tcxdvn 309 2004 công tác trắc địa trong xây dựng công trình. yêu cầu chung
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1. TIU CHUN xy dng vit nam tcXDvn 309-2004 Bin son ln 1 Cng tc trc a trong xy dng cng trnh - Yu cu chung. Surveying in construction. General requirements. 1. Phm vi p dng Tiu chun ny qui nh cc yu cu k thut v o v bn a hnh t l ln v trc a cng trnh, cung cp cc d liu chun xc dng trong thit k v thi cng xy lp, kim nh, gim st cht l ng cc cng trnh xy dng. Tiu chun ny thay th cho TCVN 3972-85. 2. Tiu chun trch dn - TCXDVN 271: 2002. Qui trnh k thut xc nh ln cng trnh dn dng v cng nghip bng ph ng php o cao hnh hc. - Tiu chun ngnh: 96 TCN 43-90. Qui phm o v bn a hnh t l 1:500; 1:1000; 1:2000; 1:5000; (phn ngoi tri). - Tiu chun ngnh 96 TCN 42-90. Quy phm do v bn a hnh t l 1:500; 1:1000; 1:2000; 1:5000; 1:10000; 1:25000; (phn trong nh). 3. K hiu dng trong tiu chun GPS H thng nh v ton cu; Sh S hiu chnh do cao mt t v mt chiu; mP Sai s trung ph ng v tr im; mH Sai s trung ph ng o cao; h Khong cao u ca ng ng mc; lch gii hn cho php; t H s c tr ng cho cp chnh xc; m Sai s trung ph ng ca mt i l ng o; t Dung sai ca cng tc trc a; Xl Dung sai ca cng tc xy lp. 4 . Quy nh chung 4.1 Cng tc trc a l mt khu cng vic quan trng trong ton b cc cng tc kho st, thit k, thi cng xy lp cng trnh trn mt bng xy dng. Chng phi c thc hin theo mt c ng hoc ph ng n k thut c ph duyt v ph hp vi tin chung ca cc giai on kho st, thit k, xy lp, nh gi n nh v bo tr cng trnh 4.2 Cng tc trc a phc v xy dng cng trnh gm 3 giai on chnh: a. Cng tc kho st trc a - a hnh phc v thit k cng trnh, bao gm : thnh lp l i khng ch mt bng v cao phc v cho vic o v bn t l ln , lp bo co nghin cu kh thi v thit k k thut thi cng. b. Cng tc trc a phc v thi cng xy lp cng trnh, bao gm: thnh lp l i khng ch mt bng v cao phc v b tr chi tit v thi cng xy lp cng trnh. Kim tra kch th c hnh hc v cn chnh cc kt cu cng trnh. o v hon cng cng trnh. c. Cng tc trc a phc v quan trc bin dng cng trnh, bao gm: thnh lp l i khng ch c s, l i mc chun v mc kim tra nhm xc nh y , chnh xc cc gi tr 2. TIU CHUN xy dng vit nam tcXDvn 309-2004 chuyn dch, phc v cho vic nh gi n nh v bo tr cng trnh. Ba cng on trn c lin quan mt thit vi nhau v cn phi c thc hin theo mt trnh t qui nh. 4.3 Vic xc nh ni dung v quy m cng tc kho st o c a hnh, yu cu chnh xc thnh lp l i khng ch thi cng v ni dung quan trc chuyn dch cng trnh l nhim v ca t chc thit k. - - Vic tin hnh kho st o c - a hnh, thnh lp l i khng ch phc v thi cng v vic t chc quan trc chuyn dch cng trnh l nhim v ca ch u t . Cng tc o c b tr cng trnh kim tra cht l ng thi cng xy lp cng trnh v o v hon cng l nhim v ca n v xy lp. 4.4 Ta v cao dng o c kho st trc a - a hnh, thit k, thi cng xy lp cng trnh phi nm trong cng mt h thng nht. Nu s dng h to gi nh th gc to phi c chn sao cho to ca tt c cc im trn mt bng xy dng u c du d ng, nu s dng to quc gia th phi s dng h ta VN2000 v kinh tuyn trc c chn sao cho bin dng chiu di ca cc cnh khng v t qu 1/50000, nu v t qu th phi tnh chuyn. Mt chiu c chn trong o c xy dng cng trnh l mt c cao trung bnh ca khu vc xy dng cng trnh. Khi hiu s cao mt t v mt chiu < 32m th c th b qua s hiu chnh Sh , nu ln hn th phi tnh s hiu chnh do cao. 4.5 Tiu chun nh gi chnh xc ca cc i l ng o trong xy dng l sai s trung ph ng. Sai s gii hn c ly bng 2 ln sai s trung ph ng. 4.6 phc v xy dng cc cng trnh ln, phc tp, v cc nh cao tng n v thi cng phi lp ph ng n k thut bao gm cc ni dung chnh nh sau: - - - - Gii thiu chung v cng trnh, yu cu chnh xc ca cng tc trc a phc v thi cng xy dng cng trnh, cc ti liu trc a a hnh c trong khu vc. Thit k l i khng ch mt bng v cao ( a ra mt s ph ng n v chn ph ng n ti u). T chc thc hin o c. Ph ng n x l s liu o c. Ph ng n x l cc vn phc tp nh cn chnh phng, thng ng ca - cc thit b, o kim tra cc khu vc quan trng vv... S b tr v cu to cc loi du mc. 4.7 Tr c khi tin hnh cc cng tc trc a trn mt bng xy dng cn nghin cu tng bnh cng trnh, kim tra cc bn v chi tit s s dng cho vic b tr cc cng trnh nh : khong cch gia cc trc, khong cch tng th, to v cao ca cc im v c s ph duy00D6t ca b phn gim st k thut ca ch u t . 4.8 i vi cc cng trnh ln c dy chuyn cng ngh phc tp v cng trnh cao tng cn phi s dng cc my mc thit b hin i c chnh xc cao nh my ton c in t, my thu chun t cn bng c b o cc nh v mia invar, my chiu ng,.... thnh lp l i khng ch c th s dng cng ngh GPS kt hp vi my ton c in t. Tt c cc thit b s dng u phi c kim tra, kim nghim v hiu chnh theo ng cc yu cu trong tiu chun hoc qui phm chuyn ngnh tr c khi a vo s dng. 5. Kho st trc a a hnh phc v thit k cng trnh 5.1 c im v yu cu chung v bn t l ln. 3. TIU CHUN xy dng vit nam tcXDvn 309-2004 5.1.1 Trn khu vc xy dng hoc qui hoch xy dng th ng o v bn t l t 1: 200; 1: 500 n 1: 5000. 5.1.2 Da vo ngha v mc ch s dng bn t l ln c th phn chia thnh hai loi: - - Bn a hnh t l ln c bn: Thnh lp theo cc qui nh chung ca c quan qun l nh n c gii quyt nhng nhim v a hnh c bn. Ni dung th hin theo qui nh ca qui phm hin hnh. Bn a hnh chuyn ngnh: Ch yu l loi bn a hnh cng trnh. Loi bn ny c thnh lp d i dng bn v mt ct c chi tit cao, dng lm ti liu c s v a hnh, a vt phc v cho kho st, thit k xy dng v s dng cng trnh. 5.1.3 Cc ph ng php ch yu c s dng thnh lp bn a hnh: - - - o v lp th v o v tng hp bng nh. o v trc tip ngoi thc a bng ph ng php ton c, ton c in t hoc kinh v kt hp o cao b mt. Bn a hnh c th v trn giy hoc th hin d i dng bn s. Ni dung ca bn ny c l u gi d i dng tp d liu v dng a hnh, a vt, to cao. 5.1.4 Ni dung ca bn a hnh t l ln cn th hin cc yu t sau: ng ng mc v cao ca tt c cc im c tr ng, (yu t a hnh); Nh ca v cc cng trnh xy dng, giao thng, h thng thu li, ng ng, ng dy cao th, in thoi, h ao, sng ngi... v cc hin t ng a cht quan st c nh cc hin t ng t gy, st l, cct v.v.... Mc chi tit ca bn tu thuc vo mc khi qut ho theo tng t l. 5.1.5 chnh xc, chi tit v y ca bn a hnh t l ln c qui nh nh sau: - chnh xc ca bn a hnh c c tr ng bi sai s trung ph ng tng hp ca v tr mt bng v cao ca im a vt v a hnh v c qui nh l : mP = 0.3 mm i vi khu vc xy dng; mP = 0.4 mm i vi khu vc t xy dng; mH = 1 3 1 4 h trong : h - khong cao u ca ng ng mc. i vi cng tc thit k, sai s v tr im t ng h gia cc a vt quan trng khng c v t qu 0.2 mm x M (M l mu s t l bn ). chi tit ca bn a hnh c c tr ng bi mc ng dng ca cc yu t biu din trn bn so vi hin trng ca chng trn mt t. Bn t l cng ln, mc chi tit i hi cng cao. Sai s do khi qut a vt r nt i vi bn t l ln khng c v t qu 0.5 mm x M y ca bn c c tr ng bi mc dy c ca cc i t ng cn o v c th biu din c trn bn , n c biu th bng kch th c nh nht ca i t ng v khong cch nh nht gia cc i t ng thc a cn c biu din trn bn . 5.1.6 Vic la chn t l bn o v cho khu vc xy dng c qui nh nh sau: T l bn a hnh cng trnh c xc nh tu thuc vo cc yu t nh : - - - - Nhim v thit k phi gii quyt trn bn Giai on thit k Mc phc tp ca a vt, a hnh Mt ca cc ng ng, dy dn... Trong c tnh n yu cu v chnh xc, chi tit v y ca bn , cc 4. TIU CHUN xy dng vit nam tcXDvn 309-2004 ph ng php thit k v b tr cng trnh. - Giai on lp lun chng kinh t k thut v thit k s b cn c bn t l 1: 10000, hoc 1: 5000. - Giai on thit k quy hoch chi tit, thit k k thut, cn s dng cc loi bn sau: a. Bn t l 1: 5000, h = 0.5m 1.0m c dng thnh lp bn c s, tng bnh khu vc thnh ph, cng nghip, thit k n khu vc xy dng; b. Bn t l 1:2000, h= 0.5m 1.0m c dng thit k k thut cng trnh cng nghip, dn dng, thu li, h thng ng dn, bn v thi cng t i tiu; - Giai on thit k k thut thi cng cn cc loi bn sau: a. Bn t l 1: 1000, h = 0.5m c dng thit k thi cng cng trnh khu vc ch a xy dng, tng bnh khu vc xy dng thnh ph, thit k chi tit cng trnh ngm, thit k qui hoch, san lp mt bng; b. Bn t l 1: 500, h = 0.5m c dng thit k thi cng cng trnh thnh ph, khu cng nghip, o v hon cng cc cng trnh; c. Bn t l 1: 200, h = 0.2m 0.5m c dng thit k thi cng cng trnh c din tch nh nh ng i hi chnh xc cao, o v hon cng cng trnh. 5.1.7 Khong cao u ca bn a hnh c xc nh da vo cc yu t sau: - Yu cu thit k v c im cng trnh; - chnh xc cn thit v cao v dc ca cng trnh; - Mc phc tp v dc ca a hnh; - Trong tr ng hp thng th ng, khong cao u c chn nh sau: h = 0.2 m ; 0.5 m cho t l 1: 200 ; 1: 500, vng ng bng; h = 0.5 m cho t l 1: 500 ; 1: 1000 vng ni; h = 0.5 m 1.0m cho t l 1: 500 ; 1: 1000 vng ng bng; 1: 2000 ; 1:5000 vng ni; h = 2.0 m cho t l 1: 2000 ; 1: 5000 vng ni. 5.1.8 Ngoi vic th hin ni dung bn trn giy m phng hin trng b mt t theo cc ph ng php truyn thng nh ni trn, cc ni dung ca bn cn c th hin d i dng tp d liu trong cc thng tin v mt t nh ta , cao ca cc im khng ch, im chi tit a hnh, a vt c biu din d i dng s v thut ton s l chng gii quyt cc yu cu c th. Loi bn ny c gi l bn s. 5.1.9 thnh lp bn s cn c 2 phn ch yu: - Phn cng gm cc my ton c in t, my tnh in t v my v bn . - Phn mm chuyn dng thnh lp bn c ci t vo my tnh in t. 5.1.10 Cc s liu ban u thnh lp bn s c th c o c trc tip trn mt t, thu thp d liu bng ph ng php o nh hoc o trn bn . - Ph ng php o c trc tip trn mt t thu thp cc d liu v to , cao cc im chi tit bng my ton c in t t ghi chp s liu sau trt vo my tnh bin v bn bng cc phn mm chuyn dng. y l ph ng php c hiu qu kinh t v t c chnh xc cao. - Ph ng php o nh thu thp cc d liu ban u l ph ng php c hiu qu kinh t cao nht. Sau khi chnh l cp nh, tin hnh o cc im c tr ng ca a hnh, a vt, t ng xc nh ta , cao v m ho c tr ng ca cc im . Trong my vi tnh cc s liu c tr ng s c x l v a v h ta thng nht theo yu cu. chnh xc ca bn s gn nh ph thuc hon ton vo chnh xc ca s liu ban u. V vy khi s dng ph ng php ny th chnh xc ca bn s ph thuc vo chnh xc o nh v t l nh. - Ph ng php o trn bn th ng c s dng trong giai on lp lun chng kinh t k thut hoc thit k s b cng trnh c yu cu khng cao v chnh xc thnh lp 5. TIU CHUN xy dng vit nam tcXDvn 309-2004 bn . Do vy c th thnh lp bn s da vo s liu o trn bn a hnh t l ln nht c. Cch lm nh vy gi l s ho bn . 5.1.11 H thng phn mm chuyn dng thnh lp bn s bao gm: - Phn mm x l s liu l i khng ch khu vc o v: Phn mm ny dng s l s liu o ngoi nghip, bao gm gii m, hiu chnh tr o, bnh sai trm my, t ng xp xp im v thnh lp cu trc s liu mng l i, tnh s hiu chnh chiu hnh cho cc tr o, tnh ta gn ng cho cc im, tnh ton bnh sai v.v... - Phn mm bin tp hnh Cc s liu sau khi np vo my tnh th cn c vo cc loi m ca n c th t ng hnh thnh bn . Nh ng do tnh cht phc tp ca bn a hnh, bn mi c hnh thnh khng th trnh khi sai st. Do cn phi dng hnh thc giao din ng i - my, tin hnh gia cng, bin tp. Phn mm bin tp hnh bao gm: hnh thnh bn , bin tp, chuyn sang my v bn , chuyn sang my in. - Phn mm bin v cc k hiu v ghi ch trn bn a hnh : Phn mm ny bo m ch hnh v v cc k hiu, ng nt v cc kiu s, kiu ch. - Phn mm v cc ng ng mc: Cn c vo cc im a hnh t ng ni suy, v ng ng mc v t ng ghi ch cao. - Phn mm s ho bn a hnh: Phn mm ny bo m vic chuyn bn a hnh t l ln hin c qua my s ho thnh bn s, bao gm c ta im cc yu t ca bn , chuyn i v l u ta , biu th hnh, to s thng nht gia s liu o thc a v s liu s ho bn c thnh lp bn s. 5.2. L i khng ch o v bn t l ln 5.2.1 C s trc a o v bn t l ln l l i trc a nh n c cc cp hng v l i khng ch o v. Trn khu vc thnh ph v cng nghip l i trc a c thit k phi m bo cc ch tiu sau: - chnh xc ca mng l i khng ch cp trn phi m bo cho vic tng dy cho cp d i nhm tho mn yu cu o v bn t l ln nht v cc yu cu ca cng tc b tr cng trnh. - Mt im khng ch phi tho mn cc yu cu ca t l cn o v. - i vi khu vc nh nn s dng h ta c lp (gi nh); 5.2.2 S cp hng ca mng l i tu thuc vo din tch khu vc o v v c qui nh theo bng 1, hoc m bo chnh xc t ng ng. 5.2.3 Mt im khng ch gm cc im tam gic hng IV, ngchuyn cp 1, cp 2 o v bn ahnh t l 1/1000 1/2000 t nht l 4 im /km2 trung bnh t 8 im 12 im/ 1 km2 ; o v bn t l 1/500 mt im khng ch c th ln ti 15 im 18 im /1km2 tu theo mc xy dng ca khu vc. 5.2.4 C s cao c xy dng d i dng cao hng II, III, IV. L i hng II c thnh lp khu vc rng c chu vi ln hn 40 km, chiu di tuyn gia cc im nt khng ln hn 10 km. L i c tng dy bng cc tuyn cao hng III. Chiu di tuyn hng III c b tr gia cc im hng II khng c v t qu 15 km; chiu di gia cc im nt khng v t qu 5 km. L i hng III c tng dy bng cc tuyn cao hng IV. 6. TIU CHUN xy dng vit nam tcXDvn 309-2004 Chiu di tuyn b tr gia cc im hng II v III khng c qu 5 km. Chiu di tuyn gia cc im nt khng c qu 2 3 km. Cc im hng IV cch nhau 400m 500 m khu vc xy dng v 1 km khu vc ch a xy dng. Bng 1 - Din tch khu vc o v v cc cp hng ca mng l i khng ch Din tch o v (km )2 Khng ch c s Khng ch o v Mt bng L i nh n c Tng dy cao Mt bng cao > 200 50 200 10 50 5 10 2.5 5 1 2.5 100 ha c thnh lp bng ph ng php o cao hnh hc vi chnh xc t ng i vi thu chun hng III nh n c . i vi cc mt bng xy dng c din tch < 100 ha l i khng ch cao c thnh lp bng ph ng php o cao hnh hc vi chnh xc t ng ng vi thu chun hng IV nh 8. TIU CHUN xy dng vit nam tcXDvn 309-2004 n c . L i cao c thnh lp d i dng tuyn n da vo t nht hai mc cao cp cao hn hoc to thnh cc vng khp kn. Cc tuyn cao phi c dn i qua tt c cc im ca l i khng ch mt bng. L i khng ch mt bng v cao cn phi c c tnh chnh xc mt cch cht ch theo nguyn l s bnh ph ng nh nht. Trnh t nh gi v kt qu nh gi c nu trong c ng hoc ph ng n k thut v phi c ph duyt tr c khi thi cng. 6.9. c tr ng v chnh xc ca l i khng ch mt bng v cao phc v xy lp cng trnh c ghi trong bng 2; Cc mc phi c t v tr thun li cho vic t my v thao tc o c v c bo qun lu di s dng trong sut mt thi gian thi cng xy lp cng nh sa cha v m rng sau ny. Khi t mc nn trnh cc v tr c iu kin a cht khng n nh, cc v tr yu cu cc thit b c ti trng ng ln, cc v tr gn cc ngun nhit. V tr cc mc ca l i khng ch mt bng phc v thi cng phi c nh du trn tng bnh xy dng . 6.10. Vic thnh lp l i khng ch mt bng phc v thi cng xy lp cng trnh l trch nhim ca ch u t . Vic thnh lp l i phi c hon thnh v bn giao cho cc nh thu chm nht l 2 tun tr c khi khi cng xy dng cng trnh. H s bn giao gm: - - - - S l i khng ch mt bng v cao (v trn nn tng bnh mt bng ca cng trnh xy dng); Kt qu tnh ton bnh sai l i khng ch mt bng; Kt qu tnh ton bnh sai l i khng ch cao; Bng thng k to v cao ca cc im trong l i. S ha v tr cc mc ca l i khng ch khi bn giao phi lp bin bn v c ch k ca c bn giao v bn nhn. Mu bin bn bn giao ti liu c lp theo quy nh trong tiu chun ngnh 96 TCN 43-90. Bng 2 - Sai s trung ph ng khi lp l i khng ch thi cng Cp chnh c im ca i t ng xy lp Sai s trung ph ng khi lp l i 9. TIU CHUN xy dng vit nam tcXDvn 309-2004 xc o gc (") o cnh (t l) o chnh cao trn 1km thu chun (mm) 1 2 3 4 6 1 X nghip, cc cm nh v cng trnh xy dng trn phm vi ln hn 100 ha, tng ngi nh v cng trnh ring bit trn din tch ln hn 100 ha 3" 1/25000 4 2 X nghip, cc cm nh v cng trnh xy dng trn phm vi nh hn 100 ha, tng ngi nh v cng trnh ring bit trn din tch t 1ha n 10ha. 5" 1/10000 6 3 Nh v cng trnh xy dng trn din tch < 1ha . ng trn mt t v cc ng ng ngm trong phm vi xy dng. 10" 1/5000 10 4 ng trn mt t v cc ng ng ngm ngoi phm vi xy dng. 30" 1/2000 15 7. Cng tc b tr cng trnh 7.1 Cng tc b tr cng trnh nhm mc ch m bo cho cc hng mc cng trnh hoc cc kt cu ring bit c xy dng ng theo v tr thit k. Tu theo iu kin c th v l i khng ch phc v b tr v trang thit b ca nh thu, c th s dng ph ng php to vung gc, ph ng php to cc, ph ng php ng chuyn ton c, ph ng php giao hi hoc ph ng php tam gic khp kn thc hin vic b tr cng trnh. Cc s ca l i b tr cng trnh trn mt bng xy dng v nh cao tng c th tham kho ph lc A. 7.2 Tr c khi tin hnh b tr cng trnh cn phi kim tra li cc mc ca l i khng ch mt bng v cao. 7.3 Trnh t b tr cng trnh c tin hnh theo cc ni dung sau: - Lp l i b tr trc cng trnh; - nh v cng trnh; - Chuyn trc cng trnh ra thc a v gic mng cng trnh; - B tr cc trc ph ca cng trnh da trn s cc trc chnh c b tr ; - B tr chi tit cc trc dc v trc ngang ca cc hng mc cng trnh; - Chuyn trc v cao ln cc tng xy lp; - B tr cc im chi tit ca cng trnh da vo bn v thit k; - o v hon cng. 7.4 T chc thit k cn giao cho nh thu cc bn v cn thit, gm: - - - - Bn v tng mt bng cng trnh; Bn v b tr cc trc chnh ca cng trnh (c ghi kch th c, to giao im gia cc trc); Bn v mng ca cng trnh (cc trc mng kch th c mng v su); Bn v mt ct cng trnh (c cc kch th c v cao cn thit). 10. TIU CHUN xy dng vit nam tcXDvn 309-2004 Tr c khi tin hnh b tr cng trnh phi kim tra cn thn cc s liu thit k gia cc bn v chi tit so vi mt bng tng th, kch th c tng phn v kch th c ton th. Mi sai lch cn phi c bo co cho c quan thit k xem xt v chnh sa. 7.5 Yu cu chnh xc b tr cng trnh tu thuc vo: - Kch th c ca hng mc; - Vt liu xy dng ; - Tnh cht; - Hnh thc kt cu; - Trnh t v ph ng php thi cng xy lp. 7.6 7.7 b tr cng trnh cn phi s dng cc my mc, thit b c chnh xc ph hp. Tnh nng k thut ca mt s my thng dng c nu trong phn ph lc D v ph lc E. Tr c khi a vo s dng cc my cn phi c kim nghim theo ng yu cu ca qui phm v Tiu chun Ngnh do Cc o c v Bn B Ti nguyn v mi tr ng ban hnh. Cc sai s o c khi lp l i b tr trc bn ngoi v bn trong to nh hoc cng trnh v sai s ca cc cng tc b tr khc c chia thnh 6 cp chnh xc tu thuc vo chiu cao v s tng ca to nh, cc c im v kt cu, vt liu xy dng, trnh t v ph ng php thi cng cng trnh. Sai s trung ph ng cho php khi lp l i b tr cng trnh c nu bng 3. 7.8 Sai s chuyn ta v cao t cc im ca l i trc c s ln cc tng thi cng c nu bng 4. Bng 3 - Sai s trung ph ng khi lp l i b tr cng trnh Cp c im ca cc to nh, cc Sai s trung ph ng khi lp cc l i 11. TIU CHUN xy dng vit nam tcXDvn 309-2004 chnh xc cng trnh v kt cu xy dng b tr trc v sai s ca cc cng tc b tr khc o cnh o gc ( ) Xc nh chnh cao ti trm my (mm) 1 2 3 4 5 Cp 1 Cc kt cu kim loi c phay cc b mt tip xc ; cc kt cu b tng ct thp c lp ghp bng ph ng php t nh v ti cc im chu lc; cc cng trnh cao t 100m n 120m hoc c khu t 30m n 36m. 1 15000. 5 1 Cp 2 Cc to nh cao hn 15 tng; cc cng trnh c chiu cao t 60m n 100m hoc c khu t 18m n 30m. 1 10000. 10 2 Cp 3 Cc to nh cao t 5 tng n 15 tng; cc cng trnh c chiu cao t 15m n 60m hoc c khu d i 18m. 1 5000 20 2,5 Cp 4 Cc to nh cao d i 5 tng; cc cng trnh c chiu cao < 15m hoc c khu < 6m. 1 3000 30 3 Cp 5 Cc kt cu g, cc l i cng trnh, cc ng x, cc ng dn ngm. 1 2000 30 5 Cp 6 Cc cng trnh bng t (trong k c cng tc quy hoch ng) 1 1000 45 10 Bng 4 - Sai s trung ph ng chuyn trc v cao ln cc mt bng xy lp 12. TIU CHUN xy dng vit nam tcXDvn 309-2004 Cc sai s Chiu cao ca mt bng thi cng xy dng (m) < 15 15 60 60 100 100 120 Sai s trung ph ng chuyn cc im, cc trc theo ph ng thng ng (mm) 2 2,5 3 4 Sai s trung ph ng xc nh cao trn mt bng thi cng xy dng so vi mt bng gc (mm) 3 4 5 5 x 7.9 chuyn to t mt bng c s ln cc mt bng lp rp trn cao c th s dng cc ph ng php: - S dng my kinh v (i vi cc nh < 5 tng); - S dng my chiu ng; ph ng php ta bng my ton c in t. - S dng cng ngh GPS. Vic chuyn to t mt bng c s ln cc mt bng lp rp t nht phi c thc hin t 3 im to thnh 1 gc vung hoc mt ng thng c th kim tra kt qu chuyn to . Nu s dng my chiu ng th phi cc l ch c kch th c khng nh hn 150mm x150mm. Ti mi v tr phi thc hin vic chiu t 3 hoc 4 v tr bn ngang ca my cch nhau 1200 (hoc 900 ) v ly v tr trung bnh ca cc ln chiu (trng tm ca tam gic u hoc ca hnh vung) to thnh c chn lm v tr cui cng s dng . Nu n v thi cng c my kinh v in t v knh ngm vung gc th c th s dng chng nh my chiu ng chuyn to t mt bng c s ln cc mt bng lp rp trn cao. 7.10 Trong qu trnh thi cng cn phi tin hnh kim tra chnh xc ca cng tc b tr cng trnh da vo cc im c s trc a. Cc lch gii hn cho php ca cng tc b tr cng trnh c tnh bng cng thc : = t.m ( 6.1) Trong : t - c gi tr bng 2; 2,5; 3 v c n nh tr c trong bn thit k xy dng hoc bn thit k cc cng tc trc a, tu thuc vo tnh cht quan trng v mc phc tp ca tng cng trnh. m - sai s trung ph ng c ly theo bng 3 v 4. 7.11 Khi bit tr c gi tr dung sai xy lp cho php ca tng hng mc cng trnh c th xc nh c dung sai ca cng tc trc a theo nguyn tc cn bng sai s: td xl 3 (6.2) trong : t - l dung sai ca cng tc trc a ; xl - l dung sai ca cng tc xy lp; S 3 - l ch 3 ngun sai s trong xy lp : Sai s do trc a, sai s do ch to, thi cng cu kin; sai s do bin dng. i vi cc cng trnh xy dng i hi chnh xc cao cn c ph ng n ring tnh dung sai v cng tc trc a. 8. Kim tra kch th c hnh hc v o v hon cng 8.1. Trong qu trnh thi cng xy lp cng trnh cc nh thu (Tng thu v cc nh thu ph) phi tin hnh o c kim tra v tr v kch th c hnh hc ca cc hng mc xy dng. y l 13. TIU CHUN xy dng vit nam tcXDvn 309-2004 cng on bt buc ca qu trnh xy dng v kim tra cht l ng sn phm. 8.2 Cng tc kim tra cc yu t hnh hc bao gm: a. b. c. Kim tra v tr ca cc hng mc, cc kt cu ring bit v h thng k thut so vi cc tham s trong h s thit k. o v hon cng v tr mt bng, cao, kch th c hnh hc ca cc hng mc, cc kt cu sau khi hon thnh giai on lp rp. o v hon cng h thng k thut ngm (thc hin tr c khi lp) 8.3 Vic o c kim tra v o v hon cng phi c thc hin bng cc my mc, thit b c chnh xc t ng ng vi cc thit b dng trong giai on thi cng. Tt c my mc ny u phi c kim nghim m bo yu cu v cht l ng theo Tiu chun Ngnh 96 TCN 43-90. 8.4 Cc yu t cn kim tra trong qu trnh thi cng xy lp, ph ng php, trnh t v khi l ng cng tc kim tra phi c xc nh tr c trong ph ng n k thut thi cng cc cng tc trc a phc v xy dng cng trnh . 8.5 Danh sch cc hng mc quan trng, cc kt cu v cc khu vc cn o v hon cng khi kim tra nghim thu do n v thit k xc nh. Vic kim tra cc kch th c hnh hc k c o v hon cng cng trnh trong tt c cc giai on thi cng xy dng cng trnh do cc nh thu thc hin. 8.6 V tr mt bng v cao ca cc hng mc, cc cu kin hoc ca cc phn ca to nh hay cng trnh v thng ng ca chng, v tr cc bu lng neo, cc bn m cn phi c xc nh t cc im c s b tr hoc cc im nh h ng ni b. Tr c khi tin hnh cng vic cn kim tra li xem cc im ny c b x dch hay khng. 8.7 chnh xc ca cng tc o c kim tra kch th c hnh hc v o v hon cng khng c ln hn 0.2 dung sai cho php ca kch th c hnh hc c cho trong cc tiu chun chuyn ngnh hoc trong h s thit k. Trong tr ng hp cng trnh c xy dng theo cc ti liu thit k c cc dung sai xy dng v ch to khng c trong qui phm hoc tiu chun chuyn ngnh th trong ph ng n k thut v cng tc trc a cn phi tin hnh c tnh chnh xc theo cc cng thc c c s khoa hc. 8.8 Kt qu o c kim tra kch th c hnh hc ca cc cng trnh v o v hon cng phi c a vo h s bo co np cho c quan t vn gim st v ch u t . 8.9 Da vo kt qu o v hon cng cng trnh v h thng cng trnh ngm ca cng trnh lp bn v hon cng. T l ca bn v hon cng c ly bng t l ca tng bnh hoc t l bn v thi cng t ng ng. Trong tr ng hp cn thit cn phi lp bng k to ca cc yu t ca cng trnh v phn ph lc. 8.10 Cc s v cc bn v hon cng lp ra theo kt qu o v hon cng s c s dng trong qu trnh bn giao v nghim thu cng trnh v l mt phn ca h s ti liu bt buc phi c nh gi cht l ng xy lp cng trnh. 8.11 Dung sai cho php v trc a khi lp gip cc kt cu b tng ct thp c sn nh cng nghip v dung sai cho php khi lp ghp cc kt cu thp nu ph lc B v ph lc C 9. Cng tc o ln, o chuyn dch nh v cng trnh 9.1 Nhng quy nh chung v o ln v o chuyn dch 14. TIU CHUN xy dng vit nam tcXDvn 309-2004 9.1.1 Vic o ln, o chuyn dch nn nh v cng trnh, cn c tin hnh theo mt ch ng trnh c th nhm cc mc ch sau: - Xc nh cc gi tr ln, chuyn dch tuyt i v t ng i ca nn nh v cng trnh so vi cc gi tr tnh ton theo thit k ca chng; - - - - Tm ra nhng nguyn nhn gy ra ln, chuyn dch v mc nguy him ca chng i vi qu trnh lm vic bnh th ng ca nh v cng trnh trn c s a ra cc gii php nh hp nhm phng ng cc s c c th xy ra; Xc nh cc thng s c tr ng cn thit v n nh ca nn v cng trnh; Lm chnh xc thm cc s liu c tr ng cho tnh cht c l ca nn t; Dng lm s liu kim tra cc ph ng php tnh ton, xc nh cc gi tr ln, chuyn dch gii hn cho php i vi cc loi nn t v cc cng trnh khc nhau. 9.1.2 Cng vic o ln v o chuyn dch nn mng ca nh v cng trnh c tin hnh trong thi gian xy dng v s dng cho n khi t c n nh v ln v chuyn dch. Vic o chuyn dch trong thi gian s dng cng trnh cn c tin hnh khi pht hin thy cng trnh xut hin cc vt nt ln hoc c s thay i r nt v iu kin lm vic ca nh v cng trnh. 9.1.3 Trong qu trnh o chuyn dch nh v cng trnh cn phi xc nh (c lp hoc ng thi) cc i l ng sau: - Chuyn dch thng ng( ln, vng, tri); - Chuyn dch ngang( chuyn dch); - nghing; - Vt nt. 9.1.4 Vic o ln v chuyn dch cng trnh c tin hnh theo cc trnh t sau: - Lp c ng hoc ph ng n k thut; - La chn thit k cu to cc loi mc chun v mc quan trc; - Phn b v tr t mc c s mt bng v cao; - Gn cc mc o ln hoc o chuyn dch cho nh v cng trnh; - S dng my o cc gi tr ln, chuyn dch ngang v nghing. - Tnh ton s l s liu v phn tch kt qu o. 9.1.5. Cc ph ng php o ln, o chuyn dch ngang v nghing nu trong c ng hoc ph ng n k thut c chn tu thuc vo yu cu chnh xc ca php o, c im cu to ca mng, c im v a cht cng trnh, a cht thu vn ca t nn, kh nng ng dng v hiu qu kinh t ca ph ng php. 9.1.6. Vic xc nh s b chnh xc o ln, o chuyn dch ngang c thc hin ph hp vi cc gi tr ln v chuyn dch ngang d tnh theo thit k c nu bng 5. Da trn c s sai s cho php o chuyn dch bng 5 xc nh chnh xc ca cc cp o; khi khng c cc s liu d tnh theo thit k th vic la chn cc cp o da vo c im ca nn t v tm quan trng ca cng trnh theo bng 6; Cp 1: o ln v chuyn dch ngang ca nh v cng trnh c xy dng trn nn t cng v na cng (thi gian s dng trn 50 nm), cc cng trnh quan trng, cc cng trnh c ngha c bit. Bng 5 - Sai s o chuyn dch i vi cc giai on xy dng v s dng cng trnh 15. TIU CHUN xy dng vit nam tcXDvn 309-2004 n v tnh bng mm Gi tr tnh ton ln v chuyn dch ngang d tnh theo thit k Giai on xy dng Giai on s dng cng trnh Loi t nn Ct t st Ct t st 1 2 3 4 5 < 50 50 100 100 250 250 500 > 500 1 2 5 10 15 1 1 2 5 10 1 1 1 2 5 1 1 2 5 10 Cp 2: o ln v chuyn dch ngang ca nh v cng trnh c xy dng trn nn ct, t st v trn nn t c tnh bin dng cao, cc cng trnh c o xc nh cc nguyn nhn h hng. Cp 3: o ln v chuyn dch ngang ca nh v cng trnh c xy dng trn nn t p, nn t yu v trn nn t b nn mnh. Bng 6 - Sai s gii hn o chuyn dch v chnh xc ca cc cp o n v tnh bng mm chnh xc ca cc cp o Sai s o chuyn dch. ln chuyn dch ngang 1 2 3 1 2 5 2 5 10 9.2. Cng tc chun b tr c khi o 9.2.1 Cng tc chun b tr c khi o ln: Cng tc chun b tr c khi o ln bng ph ng php o cao hnh hc c nu trong TCXDVN 271: 2002. 9.2.2 Cng tc chun b tr c khi o chuyn dch ngang v o nghing: Tr c khi o chuyn dch ngang v o nghing nh hoc cng trnh cn xy dng l i cc mc chun. Cc mc chun ny c coi l n nh so vi mt phng nm ngang ca cc chn ct v c th s dng cc im ny t chn my chiu ng c theo tng cao ca cc im cn o. So snh s chnh lch gia cc khong cch ngang ca cc im o s xc nh c gi tr chuyn dch ngang hoc nghing ca cng trnh theo tng h ng cc cao khc nhau. 9.2.3 Trong qu trnh o chuyn dch ngang v o nghing cn phi tin hnh nh gi n nh ca l i mc chun theo mi chu k. 9.3 Cc ph ng php o ln, o chuyn dch nh v cng trnh 9.3.1 Cc ph ng php o ln cng trnh. 9.3.1.1 Khi o ln ca nh v cng trnh c th s dng 1 trong cc ph ng php sau: 16. TIU CHUN xy dng vit nam tcXDvn 309-2004 - - - - Ph ng php o cao hnh hc; Ph ng php o cao l ng gic; Ph ng php o cao thu tnh; Ph ng php chp nh. 9.3.1.2 Ph ng php s dng ph bin o ln nh v cng trnh l ph ng php o cao hnh hc. Quy trnh k thut o v xc nh ln theo ph ng php ny c nu trong TCXDVN 271: 2002. 9.3.2 Cc ph ng php o chuyn dch ngang ca cng trnh 9.3.2.1 o ln nh v cng trnh c th s dng ring bit mt trong cc ph ng php sau hoc s dng kt hp mt s ph ng php sau: - Ph ng php h ng chun; - Ph ng php o gc - cnh. - Ph ng php o gc - cnh. 9.3.2.2 o chuyn dch ngang theo ph ng php h ng chun thc cht l o khong cch t cc im kim tra n mt phng thng ng (h ng chun) ti cc thi im khc nhau bng ph ng php o gc nh hoc ph ng php bng ngm di ng. 9.3.2.3 Trong tr ng hp khng th thnh lp c h ng chun quan trc chuyn dch ngang cn s dng mt trong cc ph ng php sau: - Ph ng php giao hi gc, giao hi cnh hoc giao hi gc cnh; - Ph ng php tam gic; - Ph ng php ng chuyn a gic. 9.3.2.4 Sai s gii hn cho php khi o chuyn dch ngang c quy nh nh sau: 1mm i vi cng trnh xy dng trn nn gc; 3mm i vi cng trnh xy dng trn nn t ct, t st v cc loi t chu nn khc; 5mm i vi cc loi p t chu p lc cao; 10mm i vi cng trnh xy dng trn nn t p, t bn chu nn km v 15mm i vi cng trnh bng t p. - - Yu cu chnh xc khi o chuyn dch ngang i vi cc cng trnh c bit c tnh ton ring trn c s thit k k thut v cng ngh ca tng cng trnh; Trong tr ng hp ch a xc nh tr c c h ng chuyn dch ca cng trnh th phi quan trc theo hai h ng vung gc vi nhau. 9.3.3. Ph ng php o nghing cng trnh 9.3.3.1 chnh xc cn thit khi o nghing cng trnh ph thuc vo loi cng trnh, chiu cao, chiu di ca cng trnh. Sai s cho php o nghing ca cc cng trnh khng c v t qu quy nh sau y: - - - i vi nn b mng ln, my lin hp: 0,00001 L i vi t ng ca cc cng trnh cng nghip v dn dng : 0,0001H i vi ng khi, thp, ct cao: 0,0005 H trong : L - chiu di ca nn b; H - chiu cao ca cng trnh. 9.3.3.2 Tu theo iu kin c th ca khu vc, chiu cao ca cng trnh v chnh xc cn thit la chn cc ph ng php o nghing sau y: 17. TIU CHUN xy dng vit nam tcXDvn 309-2004 - Ph ng php ta ; - Ph ng php o gc ngang; - Ph ng php o gc nh; - Ph ng php chiu ng; - Ph ng php o khong thin nh nh. 9.3.4 o vt nt cng trnh 9.3.4.1 Vic o c h thng s pht trin ca cc vt nt ngay t khi chng xut hin trn kt cu nh v cng trnh nhm nh gi cc c tr ng v bin dng v mc nguy him i vi qu trnh s dng cng trnh. 9.3.4.2 Khi o vt nt theo chiu di cn tin hnh theo cc chu k c nh, nh du v tr v ngy quan trc. 9.3.4.3 Khi o vt nt theo chiu rng cn phi s dng cc dung c hoc thit b chuyn dng, nh du v tr v ngy quan trc ca cc chu k. 9.3.4.4 Khi chiu rng ca vt nt ln hn 1 mm cn phi o chiu su ca n. 10. Ghi chp l u gi h s 10.1 Cc ti liu o c, tnh ton v bn a hnh t l ln phc v cho quy hoch thit k k thut thi cng xy lp cng trnh phi c l u gi d i dng bo co k thut, bn a hnh in trn giy v bn s. 10.2 Cc ti liu h s v l i khng ch thi cng, l i b tr cng trnh v cc cng tc trc a cng trnh khc phc v cho thi cng, xy lp, o v hon cng v quan trc chuyn dch cng trnh phi c tng hp, bo co, nghim thu, bn giao cho ch u t l u gi trong qu trnh xy dng v s dng cng trnh. Ph lc A (Tham kho) Cc s l i b tr cng trnh trn mt bng xy dng 18. TIU CHUN xy dng vit nam tcXDvn 309-2004 Hnh A.1- L i vung xy dng Hnh A.2- L i bao quanh theo ch gii xy dng Hnh A.3- L i a gic trung tm 19. TIU CHUN xy dng vit nam tcXDvn 309-2004 Hnh A.4 - L i b tr bn ngoi nh Hnh A.5- L i b tr bn trong nh 20. TIU CHUN xy dng vit nam tcXDvn 309-2004 Ph lc B (Tham kho) Dung sai cho php v trc a khi lp ghp cc kt cu b tng ct thp c sn nh cng nghip Ni dung Dung sai (mm) Nh mt tng Nh nhiu tng 1 2 3 lch ca trc chn mng i vi trc thit k 10 10 Sai v cao ca y mng i vi thit k 20 20 Sai v kch th c bn trong (chiu di, chiu rng ca chn mng). 20 15 Sai v v tr cc bu lng ging trn mt bng 10 10 Sai v cao u trn bu lng ging so vi thit k 20 20 lch ca ng tim ct ti tit din d i so vi trc b tr 5 5 lch ca ng tim ct so vi ng thng ng tit din trn , khi chiu cao H ca ct: D i 4,5m 10 10 T 4,5 n 15m 15 15 Trn 15m 0,001 H nh ng 35mm Sai v cao nh ct ca mi t lp (12+12n) n: th t ca t lp Sai v cao mt ta ca dm cu chy 10 10 Sai v cao cc mt ta khc trn ct nh ca gi t, ca cng son hn vo ct tr c khi lp ct, nu chiu cao ct: D i 10m Trn 10m 15 25 10 15 Sai v cao ca gi t ca cng son hn sau khi lp ct, nu chiu cao ct: D i 10m Trn 10m 5 8 5 8 lch trc panen t ng vch tit din d i i vi trc thit k 5 5 nghing ca mt phng panen t ng vch so vi ng thng ng ( tit din trn) 5 5 Chnh lch v cao mt ta ca panen t ng v vch trn lp va 10 21. TIU CHUN xy dng vit nam tcXDvn 309-2004 Ph lc B - (kt thc) Ni dung Dung sai (mm) Nh mt tng Nh nhiu tng 1 2 3 Sai v cao trn mt dm cu chy ti 2 ct gn nhau trn hng ct v ti 2 ct trong mt phng ct ngang khu 15 Sai v khong cch gia cc trc ca ng ray trong mt khu 10 Sai lch gia trc ca ng ray v trc ca dm cu chy 15 Sai lch ca trc ng ray so vi ng thng trn mt on di 40m 15 15 Sai v cao ca nh ng ray trong mt ct ngang khu : Ti gi ta Ti gia khu 15 20 Sai lch v cao ng ray t trn cc ct ln cn trong cng mt hng (L - khong cch gia cc ct) 0,001l nh ng khng qu 10mm Sai lch t ng h ca cc u ng ray k nhau theo chiu cao v trong mt phng. 2 22. TIU CHUN xy dng vit nam tcXDvn 309-2004 Ph lc C (Tham kho) Dung sai cho php v trc a khi lp ghp cc kt cu thp Ni dung Dung sai (mm) Nh mt tng Nh nhiu tng 1 2 3 lch ca trc ct so vi trc thit k ( tit din d i) 5 lch ca trc so vi ng thng ng ( tit din trn), khi ct: D i hoc bng 15m 15 Trn 15m 1/1000 chiu cao ca ct nh ng khng ln qu 35mm vng ca ct ( cong ca ct) 1/750 chiu cao ca ct nh ng khng qu 15mm Sai v cao mt ta ca ct so vi cao thit k 5 Sai v cao ch ta ca dn v dm 20 cong (vng ) ca cc on thng trong cnh chu nn so vi mt phng ca dn hoc dm 1/750 chiu di on nh ng khng qu 15mm. Sai phm v khong cch gia hai ng trc ca 2 dn ti thanh cnh th ng 15 Sai phm v khong cch gia 2 x g 5 23. TIU CHUN xy dng vit nam tcXDvn 309-2004 Ph lc D (Tham kho) Mt s my ton c in t thng dng Vit Nam D.1. Cc my ton c in t chnh xc trung bnh (s dng b tr cng trnh ra thc a, o kim tra v tr v kch th c hnh hc, o v hon cng) Tn my Hng v n c ch to o gc o cnh Trng l ng kch th c Ghi ch phn gii bn SSTP o gc ngang/ng SSTP o cnh Tm hot ng xa nht 1 2 3 4 5 6 7 8 TC 307 Leica Thu S 1" 7"/7" -Ch chun (2mm +2ppm) - Ch nhanh : (5mm +2ppm). 3 km i vi thi tit trung bnh TCR 307 c ch o khng g ng d i 80m v o laser c g ng xp x 5000m TC 305 Leica Thu S 1" 5"/5" (2mm +2ppm); (5mm +2ppm). -nt- -nt- SET5E (F,S) SOKKIA Nht Bn 1" 5"/5" (5mm +3ppm). 2000m 3 g ng 5,5 kg 236 x193x 150 Mi sn xut Power SE1100 c tnh nng t ng t 0TM 350 NIKON Nht Bn 1" 5"/5" (5mm +5ppm). 2000m 3,5kg 156x 160 x 350 GTS- 6E TOPCON Nht Bn 1" 5"/5" (3mm +3ppm). 2000m 3 g ng 5,9kg D.2. Cc my ton c in t chnh xc (s dng o cc l i khng ch mt bng) Tn my Hng v n c ch to o gc o cnh Trng l ng kch Ghi ch 24. TIU CHUN xy dng vit nam tcXDvn 309-2004 th c phn gii bn SSTP o gc ngang/ng SSTP o cnh Tm hot ng xa nht 1 2 3 4 5 6 7 8 TC 303 Leica Thu S 1" 3"/3" (2mm +2ppm) 3000 m TCR 303 c ch o khng g ng SET2B SOKKIA Nht Bn 1" 2"/2" (2mm +2ppm). 4200 m 10kg DTM 750 NIKON Nht Bn 1" 2"/2" (2mm +2ppm). 3500m GTS-4 TOPCON Nht Bn 1" 2"/2" (2mm +2ppm) 3700m 5,9kg D.3. Cc my ton c in t chnh xc cao (s dng o cc l i khng ch c chnh xc cao v quan trc bin dng cng trnh) Tn my Hng v n c ch to o gc o cnh Ghi ch phn gii bn SSTP o gc ngang/ng SSTP o cnh Tm hot ng xa nht 1 2 3 4 5 6 7 TCA 2003 TC 2003 Leica Thu S -nt- 0,1" 0,1" 1"/1" 1"/1" (1mm +1ppm) -nt- 2,5 km n 3,5 km -nt- o t ng 500m, chnh xc 2mm n 3mm o t ng 200m, chnh xc n 1mm 25. TIU CHUN xy dng vit nam tcXDvn 309-2004 Ph lc E (Tham kho) Phn cp cc my thu bnh thng dng Vit Nam E.1. Cc my thu bnh c chnh xc trung bnh ( s dng b tr cc im theo cao trn cc cng trnh xy dng, o thu chun hng IV tr xung). Tn my Hng v n c ch to ng knh Gi tr phn khong bt thu SSTP o chnh cao 1km (i v v) Ghi ch phng i Khong cch ngn nht Bt thu di Bt thu trn 1 2 3 4 5 6 7 8 Ni025 Canh Zeiss Jen c 20 x 1,5m T ng cn bng 8n/2mm T ng iu chnh B2 Nht Bn 28 x 1,8m AX-1 NIKON Nht Bn 18 x T ng cn bng 10n/2mm 5 T ng iu chnh trong phm v 12' E.2. Cc my thu bnh chnh xc ( s dng o dn cc tuyn thu chun t hng III tr xung, dng b tr cc cng trnh v cao i hi chnh xc cao) Tn my Hng v n c ch to ng knh Gi tr phn khong bt thu SSTP o chnh cao 1km (i v v) Ghi ch phng i Khong cch ngn nht Bt thu di Bt thu trn 1 2 3 4 5 6 7 8 Ni0302 5 Canh Zeiss Jen c 25 x 1,8m 30"/2mm 8n/2mm 26. TIU CHUN xy dng vit nam tcXDvn 309-2004 Tn my Hng v n c ch to ng knh Gi tr phn khong bt thu SSTP o chnh cao 1km (i v v) Ghi ch phng i Khong cch ngn nht Bt thu di Bt thu trn 1 2 3 4 5 6 7 8 KONI 007 Canh Zeiss Jen c 32 x 2,2m T ng cn bng 8n/2mm AZ- 2/2S NIKON Nht Bn 24 x 0,75m T ng cn bng 10n/2mm 2mm/1 km AP-7 NIKON Nht Bn 28 x 0,75m T ng cn bng 10n/2mm 2mm/1 km AT-G4 TOPCON Nht Bn 26 x 1,60m T ng cn bng 10n/2mm 2mm/1 km AT-M3 TOPCON Nht Bn 26 x 0,00m T ng cn bng 10n/2mm 2mm/1 km E.3. Cc my thu bnh chnh xc cao ( s dng o dn cc tuyn thu chun chnh xc cao ) Tn my Hng v n c ch to ng knh Gi tr phn khong bt thu SSTP o chnh cao 1km (i v v) Ghi ch phng i Khong cch ngn nht Bt thu di Bt thu trn 1 2 3 4 5 6 7 8 NI004 Canh Zeiss Jen c 44 x 3,0m 10"/2mm 2n/2mm 0.5mm/1 km NAK2 LEICA Thy S 40 x 0.9m T ng cn bng 8n/2mm 0,7mm 0,3mm Khng c Micrometer C Micrometer 27. TIU CHUN xy dng vit nam tcXDvn 309-2004 Ph lc E - (kt thc) Tn my Hng v n c ch to ng knh Gi tr phn khong bt thu SSTP o chnh cao 1km (i v v) Ghi ch 1 2 3 4 5 6 7 8 AS-2 NIKON Nht Bn 34 x /43 1.0m T ng cn bng 10n/2mm 0,8mm 0,4mm Khng c Micrometer C Micrometer AT-G1, (G2) TOPCON Nht Bn 32 x 1.0m T ng cn bng 8n/2mm 0,7mm 0,4mm Khng c Micrometer C Micrometer