www.hubbe l lpowersys tems .com

TRANSMISSIONTOWERS IN BRAZILA Case History: Helical Piles & Guy Anchors

®

Brazil’s demand for electricity is growing by about 4.5% per year. That means by 2021, overall demand will rise from today’s load of 472,000 GWh to a whopping 736,000 GWh—a 56% increase.

To meet this demand, the Brazilian government is building or plans to build as many as 48 new power plants over the next 10 years. Brazil is crisscrossed by rivers and all 48 plants will be hydroelectric with a combined generating capacity of 42,157 MW of power. Most of that (80%) will be generated by 18 new dams in the Amazon River Basin.

Two are already built. The Jirau dam produces 6.5 GW and Santo Antonio dam produces 6.3 GW of power. Both are in the Port Velho area.

There is just one problem.

In Brazil, the power-hungry East and Southeast is separated from the massive hydro generating plants in the Northwest by 1,475 miles (2,375 kilometers) of rugged terrain and smaller rivers. So, in addition to building new power plants, Brazil is also in a frenzy of transmission line construction. One of the largest ventures, the Rio Madeira Project, is currently under construction.

One of the largest power lines in the world is being

built in Brazil and Chance® helical piles and guy

anchors made by Hubbell Power Systems, Inc. (HPS)

are helping support the transmission towers in a

diverse array of terrains and soil conditions.

10,000 TOWERSThe Rio Madeira Project in Brazil

2

Build the Largest in BrazilBeing built by a consortium of companies, the Rio Madeira Project consists of two 600 kV DC transmission lines.

The Project will cross five Brazilian states, be supported by 10,000 towers and have approximately 47,200 miles (76,000 km) of conductor (ACSR 40/25mm). The two lines will transmit 12.8 GW of power 1,475 miles (2,375 km) from Port Velho to São Paulo.

Work on the first line began in 2011 and is nearing completion. Work on the second, parallel line started in middle of 2012 and should be completed in 2013. It will take 6,500 workers to finish and will cost approximately $1.8 billion USD (about $3.5 billion Reais).

The first line is owned by three companies: IE Madeira--formed by CTEEP (51%), Furnas (24.5%), Chesf (24.5%). The second will be owned by: NBTE--formed by Abengoa (51%), Eletrosul (24.5%), Eletronorte (24.5%).

Three companies are building the lines: Alta Energia (33%), Schahin (34%) and Toshiba (33%).

Support for all TerrainsTerrain and soil conditions vary greatly over the course of the line. As a result, tower designs vary: About 80% are single pivot, guyed towers, supported by helical anchors. About 20% are self-supporting (four legged) towers. The type of tower chosen for each location depended on geography (soil conditions) and line route (curves).

Some towers are in very remote locations making construction access difficult. When possible, center pivot, guyed towers were used, which lend themselves to the use of helical anchors.

There are three manufacturers in Brazil that produce helical anchors, but in lower quantities than HPS produces Chance® anchors. In February 2011, representatives of HPS Delmar facility in Brazil met with Alta Energia and Schahin.

Delmar is an HPS factory and distribution point for such products as arresters, cutouts and substation switches. The plant is located in Tatui, São Paulo. Delmar has been in business for more than 40 years and was acquired by HPS in 2005.

HPS suggested the tower-foundation contractors consider Chance® helical piles as an option and provided samples for testing along with quality reports and test results (including torsional loads). The contractors installed the sample helical piles down and performed compression and tension tests. They also contacted for reference other companies using Chance helical piles.

Between Schahin Engenharia and Alta Energia, both tension (SS200-square shaft) and compression (RS3500 round shaft for self support tower) were performed in Brazil under the supervision of HPS engineers.

When finished, it will be the largest transmission

line in Brazil and one of the largest in the world.

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Rio Muriaé

Rio

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R.

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Rio Macaé

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R i o nM a s o

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Rio Buranhém

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R

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RI

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R i oJ u c u r u c u

R i oI t a n h é m

Ri o

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R.

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ri

R i o

G u a p o r é

O C E A N O

P A C Í F I C O

MATO GROSSODO SUL

PIAUÍ

CEARÁ

SERGIPE

ALAGOAS

PERNAMBUCO

PARAÍBA

RIO GRANDE DONORTE

BAHIA

TOCANTINS

MARANHÃO

MATO GROSSO

GOIÁS

SÃO PAULO

MINAS GERAIS

RIO DE JANEIRO

ES

PÍR

ITO

SA

NT

O

PARÁ

TOCANTINS

MARANHÃO

RORAIMA

AMAZONAS

ACRE

RONDÔNIA

PARÁ

AMAPÁ

Foz do Iguaçu /Foz do Iguaçu Norte

ITAIPU

I taberáIva iporã

7

1312

1312

13

12

13

12

Eunápol is

Bom Jesusda Lapa

Brumado I I

Poções

FUNIL

ITAPEBI

Ib icoaraSto. Antôniode Jesus

SALVADOR

Catu

Camaçar i I I / Camaçar i IV(12)

Ol ind ina

I tabaian inhaJard im

CíceroDantas

I tabaiana

ARACAJU

Penedo

PAULO AFONSO /Zebu (11) XINGÓ

Messias /Rio Largo I I

MaceióMACEIÓ

Rio das Éguas

Gurupi

PALMAS

LAJEADO

Barre i ras

I recê

Senhor doBonf im I I

SOBRADINHOJuazei ro I I

São João do Piauí

LUIZGONZAGA

Angel im /Angel im I I

Ribe i rão

Reci fe I I /Bongi /P i rapama I I /Suape I I (11) /Suape I I I (11) /Joai ram

Pau Ferro /Mirue i ra /Urbana (12)

RECIFE

Goianinha

Tacaimbo

CampinaGrande I I

Mussuré I I /Sta.Ri ta(11)

Bom Nome

Mi lagres

El iseu Mart ins

BOAESPERANÇA

Coremas

Icó Curra is Novos I I

Santana do Matos I I

Açu I I

Banabuiú

Quixadá

Russas I I

Mossoró I I

Nata l I I /Nata l I I I (11) /Ext remoz I I (12)

NATAL

FORTALEZA

For ta leza / For ta leza I I / P ic i I I /Delmiro Gouveia / Aqui raz I I (12) / Maracanaú (16)CauípeMassapê I I

Sobra l I I IP i r ip i r i

TERESINA

Teres ina / Teres ina I I

Per i toró

Coelho Neto

Miranda I I

SÃO LUÍS

São Luís I / São Luis I I

ISAMU IKEDA

Col inas

Por toFranco

JOÃOPESSOA

Santa Cruz I I

P icos

10

12

11

Tauá

Tomba

Gov. Mangabei ra

Paraíso

Sta. Inês

Três Mar ias

ESTREITO (11)F. Noguei ras

IPUEIRAS

Dianópol is

Porangatu

Miranor teMiracema

Para isodo Tocant ins

Guaraí

Marabá

Cotegipe / Pi tuaçu / Matatu / Narandiba (11) /Jacaracanga / Pi ra já (13)

PEIXE

10

Sapeaçu

Tocant inópol is

S. QUEBRADA (18)

TUPIRATINS

Col inasdo Tocant ins

Araguaína

Imperat r iz

18

11

10

10

L imoei ro(11)

UHE MARABÁ(18)

10

10

15

11

São Luís I I I

Balsas(10)

10

10

Pres identeDutraAçai landia

10

16

Ribe i roGonçalves

10

16

11

11

Teixe i rade Fre i tas (10)

10 11

Ford / Pólo

TERMOCEARÁ

Itacaiúnas

SERRA DA MESA

14

12

Pecém II (12)

N.S. Socorro (13)

Garanhuns (12)

12

Arapi raca I I I (12)

12

Acaraú I I (12)

12

João Câmara (12)

12

Igaporã (12)

12

12

Icara iz inho

Pra ia Formosa

Aracat i I I

10

Jaguar i

Passo deLos Libres

URUGUAIANA50 MW

Alegrete 2

Maçambará

S. Vicente

SantaMar ia 3

Livramento 2

RIVERA70 MW Bagé 2 P. MÉDICI /CANDIOTA I I I (10)

Pelotas 3

Camaquã

Quinta

Marmele i ro

S.Vi tór ia do Palmar

Guaiba 2Eldorado do Sul

CHARQUEADASPólo Petroquímico

PORTOALEGRE

Porto Alegre / Viamão 3 (12)

CANOAS

Gravataí 1-2-3 / Campo Bom / Schar lauOsór io 2

Palmares

Mostarda

Taquara

Cidade Indust r ia l

S. Cruz I

V. Ai res

Lajeado 2

Caxias / Caxias 2 / Caxias 5/Caxias 6Gar iba ld i I

Farroupi lha

NovaPrata 2

SãoBorja 2

Sto. Ângelo /Sto. Ângelo I I

Missões

GARABI1 x 1100 MW1 x 1100 MW

SantaRosa

Guar i ta

Sta . Mar ta

PASSOFUNDO

MACHADINHO

ITÁ Campos Novos

Palhoça

Siderópol is

Lageado Grande

Imbi tuba

Gaspar

Ti jucasFlor ianópol is / B iguaçu

FLORIANÓPOLIS

I ta ja í I I / I ta ja íB lumenau

I lhotaPiçarras

Joinv i l le /Jo inv i l le Nor te (09)Canoinhas

Mafra

S. Mateus do Sul

CURITIBA

Ponta Grossa Sul

Are ia

G. B. MUNHOZ

S. SEGREDO

SALTOSANTIAGO

Pato Branco

Xanxerê

Herva l do Oeste

QUEBRA-QUEIXO

SALTOOSÓRIO

SALTOCAXIAS

Foz doChopin

Ponta Grossa Norte

Uberaba

Cur i t iba / Umbará / Gra lha AzulCampo do Assobio / S.J .P inhais

D. FRANCISCA

ITAÚBA

JACUÍ

PASSOREAL

Cascavel / Cascavel Oeste

Guaíra

CampoMourão

Iva iporã

Figuei raFIGUEIRAI

C. Compr ido/ Pi larz inho/ S.Qui tér ia (13)

Jaguar ia íva

G. PARIGOTDE SOUZA

Apucarana

Ib iporã

CHAVANTES

Loanda

Chuí

S.Bentodo Sul

R.Negr inho

Pelotas 1

Pelotas 2

GM

At lânt ida 2

CAMPOSNOVOS

S. Joaquim.

Rio do Sul

Jaguarão

Basi l io

10

V.Ramos Jr.Lages

Lagoa Vermelha

10

10

M.Claro

M.CLARO C.ALVES

BARRA GRANDE

S.Migueldo Oeste

FUNDÃO

S.CLARA

11

Umuarama (11)

J.Lacerda A/B/C/D

Timbó

Londr ina

Mar ingá

Assis LUCAS NOGUEIRAGARCEZ

Florestópol is

CAPIVARA

ROSANA

TAQUARUÇU

PIRAJU

Andi rá

ITAIPU

Fibraplac

N.S.RITA

Forqui lh inha (10)

Posto Fisca l

Santa Mônica

Sarandi

Tapera 2

10

10

11

Bate ias

10

13

10

Desterro

Vide i ra

10

Sal to Pi lão

10

14 JULHO

11

FOZ DOCHAPECÓ (10)

PORTOPRIMAVERA

10

Mar ingá

Candelár ia 2(13)

11

13

13

13

13

MAUÁ (11)

I ju í 2 (11)11

Rest inga (12)

12

Rest inga(12)

JUPIÁ

MIMOSO

Sidro lândia /Sidro lândia 2(10)

Anastác io

CAMPOGRANDE

Campo Grande /Imbi russu

NovaAndradinaIv inhema

RioBr i lhante

Maracaju

Aquidauana

MundoNovo

Iguatemi

Eldorado

Navi ra í

Caarapó

Amambaí

F. I tamarat i

Jard im

B. Vis ta (12)

ÁguaClara

S. Gabr ie ldo Oeste

Camapuã

Coxim

Selv i r ia

A. Taboado

Paranaíba

Cassi lândia

COSTARICA

12

Dourados

ILHASOLTEIRA

Ribas doRio Pardo (11)

Miranda

ROSANA

Corumbá

PORTOPRIMAVERA

11

Guaíra

Ponta Porã

Por to Murt inho

Cimento Eldorado

Rio Verde

PCHPONTE ALTA

PARAÍSOPCHBURITI

Cruzal t ina

Sanesul

Chapadão

Inocência

10

10 10

10

10

10

10

Jataí

SÃO DOMINGOS (11)

11

RioBr i lhante (10)10

Iv inhema (10)10

11

Qui r inópol is

EMBORCAÇÃO

CORUMBÁ I

QUEIMADO

BRASÍLIA

Bandei rantes

Anhanguera /Cara jás

Xavantes

Goiânia Leste / Tr indade (12)

Palmei ras

Fi rminópol is

Rio Verde

GOIÂNIA

Brasí l ia Gera l /Brasí l ia Sul /Samambaia

Águas Lindas

BarroAl to

I tapac i

Niquelândia

Cia. NiquelTocant ins

SERRA DA MESA

Codemin

Planal to

PONTE DEPEDRA

ITIQUIRA IITIQUIRA I I

Couto Magalhães

GUAPORÉ

Jauru

JUBA I, I I

Nobres

Coxipó

CUIABÁ

MANSO

Nova Mutum

Lucas do Rio Verde

Sorr iso

Sinop

B. Peixe

Ribei rãoz inho

Porangatu

Rondonópol is

Pontes eLacerda

ALTOJAURU

JAURU

Q. MarcosCáceres

Poconé

Rio Verde Norte

Col ider

Matupá

Al ta Floresta

CANA BRAVA

Cachoei raAl ta I I

ITUMBIARA

Paranaíba

CACHOEIRADOURADA

Gurupi

SÃO SIMÃO

Rio das Éguas

Juína (10)

DARDANELOS (10)

10

10

PEIXE

11

Brasnor te

1010

10 10

COLÍDER (15)

SINOP (15)

TELES PIRES (15)

Juba

12

15

Luz iân ia

10

Paracatu 4

Pir ineus

I taguaçu

Edéia(10)

Barra dosCoquei ros

12

11

11

Jataí

10

10

Chapadão

Vi lhena

11

10

10

11

11

12

12

Parec is (10)

10

10

12

10

10

Coletora Centro (15)

15

SÃO MANOEL (15)

FOZ DO APIACÁS (15)

CapãoBoni to

I tararé I IIn ter lagos /Xavantes /Bandei rantes

Embu-Guaçu

PIRATININGANOVA PIRATININGA

BaixadaSul

CUBATÃOHENRY BORDEN

Nordeste

Sto. ÂngeloTi juco Preto / Leste / Ramon RF

I tapet iMogi

S.J .Campos S. CRUZ / ATLÂNTICO(10)

ANGRA

FONTES

Aparec ida

Taubaté

C. Paul is ta

Bom Jard im

Guaru lhos/Nor te /Miguel RealeJURUMIRIM

Bauru

Botucatu

Avaré

LUCAS NOGUEIRAGARCEZ

Assis

S. BárbaraSumaré

SÃO PAULOIb iúna

Edgardde Souza

Cabreúva

CampinasAnhanguera /M. Fornasaro /Centro / Pi r i tuba

M. Mir im 3

Araraquara /Araraquara 2(12)

BARIRI

IBITINGA

PROMISSÃO

Ita jubá 3SantaCabeça

NILOPEÇANHA

PEREIRAPASSOS

Magé

Adr ianópol is / S. José

RIO DE JANEIRO

Jacarepaguá

RochaLeão

ILHA DOSPOMBOS

JUIZ DE FORA

Juizde Fora

Barbacena I I

I tu t inga

Conselhe i roLafa ie te 1

OuroPreto 2

Pimenta

São Gonçalodo Pará

NOVAAVANHANDAVA

MARIMBONDO

VOLTAGRANDE

PORTOCOLÔMBIA

JAGUARA

L.C.BARRETO

M.DE MORAIS

FURNAS

Ribei rãoPreto

Poços deCaldas

São Gotardo 2

NOVAPONTE

MIRANDA

BomDespacho 3

BELOHORIZONTE

Neves

IGARAPÉ

Barre i ro 1B. deCocais I I

João Monlevade I I

Taquar i l

I tab i ra I I Nova Era

GUILMANAMORIM

CANDONGA

MASCARENHAS

Ipat inga I /Mesqui ta /Usiminas

AIMORÉS

C. Pena

VITÓRIA

Guarapar iCachoei ro

Campos

NORTE FLUMINENSEMACAÉ MERCHANT

PORTOESTRELA

Gov.Valadares I I

SALTOGRANDE

TRÊS MARIAS

Várzea da Palma 1

MontesClaros I I

ÁGUAVERMELHA

CACHOEIRADOURADA

Paranaíba

ITUMBIARA

TRÊS IRMÃOS

TAQUARUÇU

Vespasiano 2

IRAPÉ

Jandi ra (12)

10 Mat ipó

Emboque/Granada

Cachoei raEncober ta

PontePalest ina

Ubá

UsinaMaur íc io

CataguasesLeopold ina

AlémParaíba

Guary

Valpara isoF.Paul is ta

Pres.Prudente

Catanduva1 e 2

São José doRio Preto

Votuporanga

Jales

Araxá

Sacramento

Uberaba

Patrocín io

Patosde Minas

Uber lândia

Janaúba

Mocambinho

MontesClaros I

Pi rapora 2

Diamant ina

Teóf i loOtoni

PadreParaíso

Jequi t inhonha

Araçuaí

NovaVenécia

L inhares

João Neiva

SUÍÇA

11

11

Paracatu 4

CAPIVARA

CHAVANTES

JUPIÁ

Londr ina

EMBORCAÇÃO

Oeste

ILHASOLTEIRA

PIRAJU

Viana 2

Jaguar ia íva

10

SANTA CLARA

Coromandel

Vazante

Paracatu 1

João Pinhei ro

Bocaiúva

Unai 3

TAQUARUÇU

11

Verona

12

Estre i to

At iba ia 2 (10) 12

N. Iguaçu (12)

11

11

QUEIMADO

15

15

I ta t iba (12)

12

Araras (10)

Mirassol 2 (10)

10

Getu l ina (10)

PORTOPRIMAVERA

SÃO SIMÃO

S.Dumont (11)

Bate ias

Luziân ia

10

I tab i r i to 2 (12)12

12

12

PadreFia lho (12)

12

14

1111

BAGUARI

10

Gerdau

Sal to (12)

12

12

Gra jaú

12

SIMPLÍCIO(11)

11

11

Gurupi

PALMAS

Teres ina / Teres ina I I

Per i toró

Coelho Neto

SÃO LUÍS

Transamazônica

Santarém

Açai landia

Rurópol is

Vi la do Conde

Guamá

BELÉM Santa Mar ia

ISAMU IKEDA

Col inas

Sta. Inês

Três Mar ias

Mãe do Rio

ParagominasTai lândia

Cametá

F. Noguei ras

Ribei roGonçalves

Rio Vermelho

Xinguara

Redenção

S. Fél ix XinguTucumã

Dianópol is

Porangatu

Miranor teMiracema

Para isodo Tocant ins

Araguaína

Marabá

AMAPÁ

18

I ta i tuba

ESTREITO (11)

PEIXE

11

LAJEADO

TUPIRATINS

Guaraí

TUCURUÍTUCURUÍ

Moju

Tapajós CURUÁ-UNA

Al tamira

Pres identeDutra

Balsas(10)

UHE MARABÁ(18)

10

15

Miranda I I

IPUEIRAS

12

10

Ut inga

Miramar (12)

12

10

16

Por toFranco

Tocant inópol is

Imperat r iz

1116

I taca iúnas11S. QUEBRADA (18)

14

Encruzo Novo (12)

12

Al tamira

Jurupar i (12)

Transamazônica

CURUÁ-UNA

Rurópol is

MANAUS

Vi la do Conde

Guamá

Ut inga

BELÉM Santa Mar ia /Castanhal (10)

BALBINA

Abunã

Guajará-Mir im

Ar iquemes

Jaru

J i -Paraná

PORTOVELHO

SAMUEL

RIO BRANCO

BOA VISTA

Sta. Elena

Tartarugalzinho

C. NUNES

SANTANA MACAPÁ

Oiapoque (12)

Mãe do Rio

Paragominas

Moju

Tai lândia

Cametá

Xinguara 2

Redenção

S. Fél ix XinguTucumã

Marabá

Serra doNavio

Calçoene

11Manacapuru(11)

I tacoat iara (12)

I randuba(11)

Pimenta Bueno

11

11

Amapá

UHE MARABÁ(18)

BELO MONTE (15)

STO. DO JARI (15)

Santarém

Ita i tuba

Tapajós

Cara jás

Or ix iminá (12)

TUCURUÍ

12

Epi tac io lândia

11

Xingu (12)

12

12

12

12

12

12

Laranjal (12)

Vi lhena

12

Univers idade (13)13

12

12

12

12

12

12

11

S. ANTÔNIO (12)

JIRAU (13)

P.F iguei redo

Carnot (12)

13

I taca iúnas

12

12

12

12

14

Miramar (12)

12

10

16

Imperat r iz

Macapá (12)

11

11

11

1111

11

11

11

11

Lechuga (12)

14

In tegradora

12

15

J. Teixe i ra (12) /Mauá I I I (12)

12

15

15

SÃO LUIS DO TAPAJÓS(16)

JATOBÁ (19)

CACHOEIRA DO CAÍ (19)

JAMANXIM (19)

CACHOEIRA DOS PATOS (19)

CHACORÃO (19)

JARDIM DO OURO (19)

15

5º

O L

N

S

0º

-5º

-10º

-15º

-20º

-25º

-30º

-75º -70º -65º -60º -55º -50º -45º -40º -35º

-25º

TRÓPICO DE CAPRICÓRNIO

-20º

-15º

-10º

-5º

0ºEQUADOR

-35º-5º

-40º-45º-50º-55º-60º-65º-70º

-30º

Usina Hidre lé t r ica

Usina Hidre lé t r ica Planejada

Usina Térmica

Usina Térmica Planejada

Subestação

Subestação Planejada

Conversora

Conversora Planejada

50 0 50 100 150 200 250 km

Escala 1 : 5.000.000

Pro jeção Pol icônicaMer id iano Centra l : 54 W. Gr.

LEGENDA

LINHAEXISTENTE

750 kV

600 kV CC

500 kV

440 kV

345 kV

230 kV

138 kV

69 kV

LINHAPLANEJADA

TENSÃO DEOPERAÇÃO

M I N I S T É R I O D E M I N A S E E N E R G I A

DIRETORIA DE PLANEJAMENTO E ENGENHARIA

SISTEMA ELÉTRICO BRASILEIROCONFIGURAÇÃO 2019

08/2010

DEPARTAMENTO DE PLANEJAMENTO DE TRANSMISSÃO

Fonte: PDE 2010/2019 - MME Obs: Algumas datas foram atual izadas de acordocom os Lei lões de Transmissão da Aneel

SUPERINTENDÊNCIA DE TRANSMISSÃO

Capi ta l

Some tower locations were very remote and a challenge to access.

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Fully satisfied, the contractors placed their first order in August 2011. Of the helical piles used on the first line, 50% are Chance® brand. The first line of the Rio Madeira project has 4300 towers. Of that, 3440 are guyed towers, with 1800 supported by Chance SS200 helical piles. Of 860 self-supporting towers, 250 are supported by Chance RS3500 helical piles.

Advantages Add UpBrazilian utilities and contractors have been using concrete, driven-pile and precast tower foundations for several years. While technically efficient, these approaches have some disadvantages.

Since most of the towers are in remote locations, helical piles worked very well, and can be used in diverse soil conditions. Very sandy soil at some sites along the route would impede the installation of concrete foundations. Holes dug in sandy soil tends to cave in and require not only shoring but larger mass. Transportation obstacles to other sites would have impaired delivery of concrete and all its related equipment. These problems were overcome by helical piles, requiring one relatively small installation machine and fewer workers. This resulted in significantly lower total labor costs to install helical piles compared to a large concrete foundation for a single tower.

concrete/precast/driven pile

• Requires a lot of cement

• Requires a lot of water

• Requires large earth moving equipment

• Requires large workforce

• Significant vibration (Driven Pile)

• Large impact on environment

• Difficult to install in some weather conditions

helical pile

• Requires no cement

• Requires no water

• Requires small tractor or backhoe with drive head

• Requires small workforce

• No vibration

• Very little impact on environment

• Can be installed in any weather conditions.

Comparison of Foundation Types

Extension rods allow the drive head to drill the helical piles deeply into the ground, until the proper torque is reached.

Helical foundations are easier and faster to install than traditional, concrete foundations. They also require significantly less material and far fewer workers.

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5

Testing and ConfidenceAfter installation, the contractors tested the majority of the helical piles. On the four legged towers that rest on helical piles, the contractors tested one of the five to seven piles for each leg. On the center pivot towers, the contractors tested every guyed foundation.

Testing was necessary for two reasons. First, the Brazilian government required it as part of the construction contract. Second, this was the first time the contractors had worked with this type of foundation system and they wanted to confirm the piles would work in the various soil conditions.

Testing did reveal a few problems that illustrate the importance of having accurate soil information. At some sites, soil conditions were deceiving. At one such location, a helical pile had been installed to the correct torque resistance, but testing pulled it out. To remedy that, the contractor simply installed the helical pile deeper. At another site, subterranean cavities forced the engineers to abandon a center pivot design and put in a self-supporting tower due to those soil conditions.

All problems were resolved by correcting testing procedures, changing the tower design or readjusting drilling depths (torque).

Circuitous Delivery RouteHPS manufactures Chance® helical piles in Centralia, Missouri, but the product needed to go to the wilds of Brazil. This required an interesting materials delivery route.

First packed in crates in Missouri, the helical piles then shipped to a US port and by sea to Santos, the largest port in Brazil. From there, shipments were delivered by trucks over the 150 miles (240 km) to the HPS Delmar facility. From there, the materials were transported to staging areas and construction sites across Brazil — including some destinations as far as 1,800 miles (3,000 km).

There were no shipping or delivery problems. Everything arrived on time. Orders were placed well in advance, so HPS could plan manufacturing and transportation. At first, sources in Brazil made deliveries sooner than HPS. By the end of the project, Chance® helical piles were delivered ahead of schedule and faster than those of local competitors.

This high level of service and product performance bodes well for future projects to employ Chance® helical piles and guy anchors. Their value as a solution for difficult site and soil conditions was well received.

The international and interpersonal experience of this iconic undertaking

established strong ties between all parties involved. Those relationships

formed a working foundation certain to continue building in concert with

Brazil’s next power line ventures.

Extensive testing was done on the helical piles, including tension tests.

Contractors also ran compression tests.

Extension

Lead Section

Guy Adapter

CHANCE® Square Shaft (SS) Helical Product Ratings

Product SeriesTorque Rating

ft-lbs (Nm)Ultimate Tension Strength*

kip (kN)

Uplift/Compression Capacity Limit**

kip (kN)

SS5 5,500 (7 500) 70 (312) 55 (245)

SS150 7,000 (9 500) 70 (312) 70 (312)

SS175 10,500 (14 200) 100 (445) 110 (489)

SS200 16,000 (21 700) 150 (668) 150 (668) ***

SS225 23,000 (31 200) 200 (890) 200 (890) ***

* Based on Mechanical Strength of Coupling

** Based on Torque Rating – Uplift/Compression Capacity Limit = Torque Rating x Kt.

“Default” Kt for Type SS = 10 ft-1 (33 m-1)

*** Based on Mechanical Strength of Coupling Bolt

Higher Compression Capacities Available with Helical Pulldown® Micropile

Load capacities to 200,000 lb.Torque capacities to 20,000 ft-lb.

Five performance sizes are suited to a wide range of soil conditions.

Chance® helical guying anchors and foundation piles work together to provide adequate lateral support and resistance to overturning moments.

• Draw on our 100 years of anchoring leadership in the industry

• Call on us for our expert anchor-engineering application support

• Utilize our copyrighted HeliCAP® Helical Capacity Design Software

• Get our unmatched manufacturing capacity, capability and in-stock inventory

Square Shaft guy anchors deliverfor heavy loads in tough soils

®

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Product SeriesTorque Rating

ft-lbs (Nm)Ultimate Tension Strength*

kip (kN)

Uplift/Compression Capacity Limit**

kip (kN)

RS2875.203 5,500 (7 500) 60 (267) 49.5 (220)

RS2875.276 8,000 (10 846) 90 (400) 72 (320)

RS3500.300 13,000 (17 600) 120 (534) 91 (405)

RS4500.337 23,000 (31 200) 140 (623) 138 (614)

RS6625.280 40,000 (54 233) 200 (890) 200 (890)

RS8625.250 60,000 (81 349) 300 (1 334) 300 (1 334)

* Based on Mechanical Strength of Coupling

** Based on Torque Rating – Uplift/Compression Capacity Limit = Torque Rating x Kt

“Default” Kt for Type RS2875 Series = 9 ft-1 (30 m-1); for Type RS3500.300 = 7 ft-1 (23 m-1);

for Type RS4500.337 = 6 ft-1 (20 m-1);

for Type RS6225.280 = 5 ft-1 (13 m-1);

for Type RS8624.250 = 4 ft-1 (13 m-1);

CHANCE® Round Shaft (RS) Helical Product Ratings

Soil and load-matched capacities:Any load. Anywhere.

To match a wide range of site conditions, Chance® foundations include single-piece and extendable designs.

Helix plates of mill-specified high-strength steel distribute the up-lift and compression forces.

The central shaft transfers horizontal shear, torsion and bending loads to surrounding soils.

Properly selected helical-pile foundation groups can support virtually any transmission structure loads in any soil conditions.

Instant Foundation® helical pilesgo places concrete piers cannot

®

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About Hubbell Power SystemsHubbell Power Systems (HPS) manufactures a wide variety of transmission, distribution, substation, OEM and telecommunications products used by utilities. HPS products are also used in the civil construction, transportation, gas and water industries. Our product line includes construction and switching products, tools, insulators, arresters, pole line hardware, cable accessories, test equipment, transformer bushings and polymer precast enclosures and equipment pads.

Hubbell has a policy of continuous product improvement. We reserve the right to change design and specifications without notice.

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