foundation improvement of historical buildings by micro ... · 7th ism workschop 2006,...

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Foundation improvement ofhistorical buildings by micro piles

Museum Island Berlin,St. Kolumba Cologne

Dipl.-Ing. Klaus DietzDr.-Ing. André Schürmann

Dietz Geotechnik Consult GmbH, Hilden, GermanyStump Spezialtiefbau GmbH, Langenfeld, Germany

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structuring

1. introduction

2. micro pile as foundation improvement element

3. case histories3.1 Museum Island, Berlin3.2 St. Kolumba, Cologne

4. conclusions

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Stump-system steel-tube pile

Stump-system composite pile

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Load bearing systems and wall connections

Wall-recess

tensionanchor

micro pile

mortar connectionbeam

plug in girder

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Museum Island, Berlin

New Museum

Erected 1841 – 1855

Destroyed WW II

Renovation 1990 - 2009

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Museum Island, Berlin

New Museum

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„Mudde“muddy soil

dense-medium sand

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History of St. Kolumba

church before WW II church short before renovation

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concept of new

Diözesanmuseum

above the ruins

of St. Kolumba

by

Peter Zumtor

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Foundation concept new Diözesanmuseum

cross section digging field

RB +12,919

OK Kuppel+12,919

+0,073

bestehende Kapelle

Ø 298,5 x 30 mm

GEWI-PfahlØ 32 mm

GEWI-PfahlØ 63,5 mm

GEWI-Mehrstabpfahl2 x 40 mm + 1 x 50 mmGEWI-Pfahl Ø63,5 mm

Ø 298,5 x 30 mm

Grabungsfeld

RB +12,919

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preparing investigations

before

masonry core

after grouting

test drilling

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preparing investigations

execution of pile test

Kraft - Verschiebungsdiagramm, Pfahl G1

0

5

10

15

20

25

30

0 500 1000 1500 2000 2500 3000 3500 4000

Kraft [kN]

Ver

schi

ebun

g [m

m]

proaf load 4000 kNpile test equipment

disp

lace

men

t[m

m]

Load displacement diagram, test pile G1Load [kN]

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View arrangement of implants and nailcolumns

internal column

support constructionimplant

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implant in theoutside walls(cross section and view, detail implantcoupling)

Steel tupe 298,5x 30mm

Steel tubeextension

Reinforcedconrete Beam

Masonrynew building

GEWI single bar-or multi bar-pile

Bend securingGEWI-pile2x 32mm

Ground level

High-quality steel tube

Existing masonryof ruin

Top ofexcavation

Old foundation arch

Gravel

VaultPre-stabilizationof masonry

+7,14m top of implant

Bottom level implant

Cross-section View

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view masonry column and cross section implant

Steel tube (298,5 x 30 mm)Special-steel-protection tube (330 x 5 mm)

GEWI-pile

grout

Steel-tubeProtection tube

Cross section

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5

1

2

3

4

Pile production

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Core drilling through the old walls

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drilling for pile installation

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foundation nailcolumns digging field

□ 350/350/30 mm+12,26

10 StahlrohrØ 289,5 x 30mm

10 Brandschutz

420/420/60 mm

Ankerbolzen

Pagel Verguss

7036

36

verdichtete Anschüttung (Kies)

Kontermutter

AnkermutterAnkerplatte

Sauberkeitsschicht

KunststoffripprohrDistanzhalter

Bohrung Ø 220 mm

GEWI-Pfahl Ø 63,5 mmmit doppeltem Korrosionsschutz

Pfahlneigung 10° zur Vertikalen

Einb

i nd e

t i efe

t =

6 m im

ge w

a ch s

e ne n

Kie

s /S a

n d

Einbindetiefe t = 6m im gewachsenen Kies/Sand

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Drilling for micro piles at the chapel and on the digging field

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conclusions

• introduction of project specific measures• quality safety programme

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Thank you for yourattention