who wants to build high towers, has to spend time on a...

Klaus Hudelmaier · Ingenieurbüro für GrundbauBVV Spezialtiefbautechnik Vertriebs GmbHBleibtreustrasse 9, D-81479 Munich/GermanyTel.: +49-(0)89-6 65 19 30Fax: +49-(0)89-6 13 17 [email protected] ko

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OFFER

The specialist: more than 30 years of activity in special deep foundation.

His success is based on experience and reliability.

Turn his experience to your advantage! From planning

and specialist advice to applications technology com

bined with a variety of high quality specialist machi

nery, everything can be obtained from one source.

Fundamentally safe!

Klaus Hudelmaier has been active in special deep foun-

dation work for more than 30 years as contractor and

expert in the development of projects and applications

technology.

Below please find a range of outstanding projects:

2 3

Who wants to build high towers, has to spend time on a solid base.

Anton Bruckner

One of Munich’s deepest excavations! Since the possi

bility of building to great heights was limited, the

foundations had to be laid at a depth of 30 m.

OFFICE BLOCK FOR "MÜNCHNER RÜCK” REINSSURANCE, MUNICH LEOPOLDSTRASSE

The execution.

The excavation with dimensions of 80 m x 55 m, has

a depth of 31.0 m below ground level.

For securing the excavation a combination of sheet pile

walls and augered piles of 1.200 mm diameter is installed.

After an excavation depth of six metres the excavated

soil is deposited at the

south west side of the

excavation by a 4 m3

wheel loader. From there,

the excavated soil is

transported vertically

upwards by a crawler

The task.

To create the excavation for the new administration

building for "Münchner Rück” reinssurance with seven

storeys underground.

The challenge

* Buildings directly adjoining the excavation site.

* Connecting the excavation to one of Munich’s main

arterial roads.

* Regulations on environmental protection and noise

prevention require water recycling and reduction of

emissions.

* Quaternary groundwater level may not be lowered.

* Tertiary groundwater has to be unconfined.

The soil conditions.

* Two metres of concrete foundations of the previous

building.

* Underneath: gravel, tertiary sands and clay with depo-

sits of limestone.

Seven storeys down to a depth of 31 m.

Contractor for special deep foundation projects

crane with 3 m3 grab (monitored by closed-circuit tele-

vision) and loaded onto lorries. Before the lorries are

allow ed onto the road again, their tyres are cleaned in a

specially developed tyre-wash. Within 9 months 8,300

m2 of sheet pile walls and augered piles, which are

secured by 4 rows of soil anchors, are installed and

130,000 m3 of excavated soil is transported from the

jobsite.

In a 3-path filter system 100 m3 per hour of groundwater,

processing water and jetting water is turned into drinking

water again and re-circulated to groundwater via a

640 m long pipeline and 12 dry wells.

4 5

Always a great challenge: excavations for buildings

that are supposed to rise high up to the sky.

The execution.

The excavation walls for the Deutsche Bank are installed

as a combination of an interpile sheeting in the quater-

nary gravel and a slurry wall in the clay, sand and lime-

stone formations. Because of the 4.5 m thick base plate

and the underground storeys, slurry wall sections with an

installation depth of 22 m are used. The slurry wall is

secured by a total of over 10,000 m of pressure grouted

soil anchors.

The task.

To create the excavation for a building with 40 storeys

above ground level and 3 storeys underground.

The challenge.

* Directly adjacent buildings.

* Extremely difficult soil and groundwater conditions.


* Quaternary gravel with groundwater.

* Sands and clay with confined groundwater and

deposits of limestone.

Multi-storey building on good ground.

A total of 2,200 m2 of slurry wall and 1,000 m2 of inter-

pile sheeting are installed in order to create the excava-

tion for one of Germany’s architectural symbols.

During construction much attention is paid to the settle-

ment of the 4.5 m thick base plate. It is monitored by an

extensive measuring programme and – if necessary –

balanced by ballasts fixed to the base plate.

6 7

DEUTSCHE BANK (BANK OF GERMANY), FRANKFURT


Behind the excavation the timehonoured law court,

to the right a through road with heavy goods traffic,

to the left a department store. And below two adja

cent roads the tunnels of the "SBahn” (suburban

railway) and the "UBahn” (underground railway).

The execution.

Since the client wants the excavation to be completed in

the shortest possible period of time, a vibrated sheet pile

wall is chosen. In order to check the effect of the vibra-

tions on the vicinity – the law court as well as the

"S-Bahn” and "U-Bahn” – the vibrations are measured. The

measurements reveal that there is no risk of damage to

the law court due to the vibrations. The vibrations

measured in the "S-Bahn” and "U-Bahn” tunnels are below

the limits allowed for these constructions. On the basis

of these results a sheet pile wall is installed down to 16.0

m below ground level and from 11.5 m below ground level

a pile wall is built to support the bottom of the sheet pile

wall and to found the outer walls of the building.

The task.

To create a square excavation with 90 m long sides for

the "Elisenhof”, an office block and commercial centre

well situated in the centre of Munich.

The challenge.

* Immediate vicinity to the old law court.

* Main arterial road with heavy goods vehicle traffic

directly alongside the excavation.

* Two sides of the excavation border on the "S-Bahn”

and "U-Bahn” tunnels.

* Excavation depth: 14 m for four underground levels.


* Replenishments down to approx. four metres.

* Gravel down to approx. eight metres; beneath: silty,

fine sand down to a depth of 14 m.

* Below: cohesive tertiary.

* Several groundwater levels.

* First level horizon of groundwater approx. 4.0 m deep.

Gently rocking the foundations of the Law.

Three sides of the sheet pile wall are anchored by pres-

sure grouted soil anchors. On the fourth side such ancho-

rage is not possible due to the "S-Bahn” tunnel.

The solution: a steep slope remains in the excavation and

is secured by a lining. As soon as the construction reaches

the slope the lining wall between sheet pile wall and the

partly finished building is supported by struts and simul-

taneously, the slope is removed from top to bottom.

When the bottom of the foundation is reached, the rest

of the building is finished.

8 9

OFFICE BLOCK AND COMMERCIAL CENTRE "ELISENHOF”, MUNICH


Listed buildings in the direct neighbourhood. Building

foundation immersed four metres in groundwater.

A narrow jobsite in the inner city area.

The execution.

For the executing contractor a special proposal is drawn

up: surrounding the excavation by a steel sheet pile wall

secured by rearward anchorage. The sheet piles pene-

trate the deep clay stratum, so a impermeable trough is

created.

The task.

In a heavily built-up area a building is to be built with its

foundation 4 metres below groundwater level. Greatest

demands are made on the construction method for the

building requirements. Due to the buildings directly

adjoining the excavation, which are partly listed, a

method low in vibration but nevertheless economical

has to be used.

0The challenge.

* Seven metres deep excavation, groundwater level

approx. three metres below ground level.

* Lowering the groundwater level is not permissible.

* Creating the excavation as an impermeable trough.

* Precise monitoring of the vibration emissions on

adjacent buildings and observing low limits.


* Artificial replenishment down to a depth of four to

five metres.

* Underneath: an up to three metres thick stratum of

peat and silty sands.

* Down to a depth of 14 to 15 metres gravel and sands

which are followed by a very thick clay stratum.

* The groundwater level (about three metres deep)

requires an excavation created as dense trough.

For difficult building conditions there are three remedies: experience, experience, experience.

The adjacent building is listed.

Consequently, the vibration emission

may not exceed 2.0 mm/sec. As instal-

lation aid for the 16.5 m long sheet

piles in pairs low pressure jetting is

chosen. During installation emission

limits are observed. The excavation

with 4,350 m2 of sheet pile wall with

non-polluting lock sealing compound

and 2,050 m of pressure grouted soil

anchors is completed within the

period stipulated.

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5

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7

8

9

10

11

12

13

14

15

16

170 100 200 300 400 0 10 20 30 40 0 5 10

Depth [m]

Pressure [Bar] Frequency [Hz] Time

Depth [m] Depth [m]

8.00

11.70

14.20

15.30

17.30100.43

5.50

5.00

3.40

1.70

A

BGS - 7.25 110.70

112.25

102.40

117.73

7.05 GW

1.70 Silt(very sandy, soft) >4<

1.60 Silt(very sandy, soft) >4<

0.50 Peat(sandy, soft) >2<

2.50 Sand

3.70 Sand

2.50 Sand

1.10 Gravel(very sandy) >3<

2.00 Clay(sandy, silty, semisolid) >4-5<

1.70 Filling (bricks, stones, silt, gravel, sand)

starting time 18:07:50ending time 18:13:35date 24.02.1997Max. depth [m] 16,95job site 961072pile no. 15

PDE®

B IV

Cut-off wall with sheet piles

Production methods

Bored piles Sheet pile wall Deep sealing sole ashigh pressure grout injection or plastic gel injection

OK Surface = 117,70

BoEx = 110,70

Clay ~ 102

Sand, Gravel

b

Clay ~ 102

Sand, Gravel

10 11

WEIHERHOF CENTRE, KARLSRUHE


Jetting – assisted vibrating

Flushing pipes

Jetting platform

Gravel

Clay

Gravel

Clay

RIEM ARCADEN, MUNICHRIEM

The execution.

The building contractor had planned a single-phase slurry

wall with integrated sheet pile wall of 31 m depth, in

order to penetrate the impermeable clay strata. According

to the special proposal projected and worked out by

Klaus Hudelmaier the single-phase slurry wall with inte-

grated sheet pile wall is replaced by a vibrated sheet pile

wall. The sheet pile wall penetrates the impermeable

tertiary sand at 22 m below ground level.

In order to minimize water ingress below the bottom of

the sheet pile wall and to close the jetting gap which is

necessary for installing the sheet piles, the jetting water

Project development

is replaced by bento-

nite suspension on the

last few metres. Thus,

the sheet pile wall is

tightly joined with the surrounding soil.

The impermeability of the sheet pile wall trough with the

immense dimensions of 330 m x 180 m is further

im proved by the fact that the locks of the sheet pile wall

are sealed with a sealing compound.

The pre-calculated amount of 160 l/sec remaining water

is reduced by 25%.

In his function as technical advisor Klaus Hudelmaier

is as much admired as he is wellknown as executing

contractor. He willingly offers others his vast experi

ence in special deep foundation. This often makes

building projects easier and thus cheaper.

The task.

To enclose the excavation as an impermeable trough.

Installation of a single-phase slurry wall, complete with

sheet piles, secured by two rows of soil anchors.

The challenge.

* Dimensions of the excavation 330 m x 180 m.

* Installation of lining walls in very densely compacted

gravel and sands.

* Short deadline for completion.


* Replenishments to a depth of four metres.

* Gravel to a depth of approx. eight metres.

* Underneath: silty, fine sand to a depth of 14 metres.

* Below these strata: clay and fine sands in alternating

strata.

Well-advised thanks to vast experience.

12 13

The execution.

The original plan projected costly soil exchange drillings

in order to install the sheet piles. Upon Klaus Hudelmaier’s

proposal jetting assisted vibrating with a strong vibrator

and a basic machine with rope crowd system is used for

installing 5,100 m2 of sheet piles. At some points the

tertiary clay-silt has to be penetrated down to a depth of

Project development

three metres! A situation which makes the highest demands

on material and machinery.

Thanks to Klaus Hudelmaier’s many years of experience,

especially concerning the selection of the machines to be

used, all sheet piles can be installed in time and the building

project is completed at a much lower cost.

Soft wood flood planeHard wood flood plane

Wieland-Kanal 14m3/s

Power plant

Städtlegraben

90m3 /s

Städtlegr.

(vertie

ft)

UIAG-Kanal

ILLER

Restructuring Distance

AU

DIETENHEIMSeepage water drain pipe

Gießen - Extension

Gießen

70-180l/s

Special building projects require special consultation.

For restoring a section of the River Iller at Illertissen

a soil formation causes great difficulties.

The task.

In the course of the restoration of an Iller section for-

ming the natural border between Bavaria and Baden-

Württemberg, drop structures have to be installed into

the river on a distance of 6 kilometres (3.7 miles).

The challenge.

* Sheet pile wall penetrating clay down to a depth of

three metres.

* Selecting the appropriate vibrator and fitting sheet

pile profiles.


Beneath a two to four metres thick stratum of gravel

tertiary formations are situated. They consist of hard,

almost impenetrable clay-silt.

5.100 m2 of sheet piles – and all is in a state of flux

14 15

DROP STRUCTURE IN THE RIVER ILLER AT ILLERTISSEN

In close cooperation with the equipment producing

company LIEBHERRWerk Nenzing GmbH and Dieseko’s

Piling + Vibro Equipment, Klaus Hudelmaier offers his

customers extensive and competent advice as well as

complete support in applications technology.

A combination offering a competent link between

applications technology and equipment technology.

EQUIPMENT TECHNOLOGY

Consultation.

* On special technical solutions

* On applications technology

* On the selection of equipment

* On job scheduling

That is the way to carry out building projects

perfectly.

Phone: +49(0)896 65 19 30

Email: k.hudelmaier@bvvspezialtiefbau.de

Everything from one source. Consultation – selection of applications technology – selection of equipment.

Salesrental

16 17

Since 1 April 1995, Klaus Hudelmaier is managing partner of

the BVV Spezialtiefbautechnik Vertriebs GmbH in Munich,

which he also founded.

Born in 1942, he first learned bricklaying after leaving

school.

After finishing studies to be a civil engineer at the colleges

of Stuttgart and Munich he held various professional posi-

tions in special deep foundation companies, among others

as construction manager and assessor in the foundation

laboratory of the Sager & Woerner company, as managing

director of the TerraGrundbau GmbH and as partner and

managing director of the Techno Grundbau GmbH in

Munich.

Personal data.

VITA KLAUS HUDELMAIER

18

In 1988 he opened his own engineering company for foun-

dation and soil mechanics.

Since many years a close cooperation in the field of equip-

ment development and application systems in special deep

foundation exists between Liebherr-Werk Nenzing GmbH,

Dieseko Verhuur B.V. in Sliedrecht, his engineering company

and BVV.

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