CASE STUDY: BIM AND GEOTECHNICAL PROJECT IN URBAN … · 72 million years ago by several important...
Transcript of CASE STUDY: BIM AND GEOTECHNICAL PROJECT IN URBAN … · 72 million years ago by several important...
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João Gondar, JETsj Geotecnia [email protected]
Alexandre Pinto, JETsj Geotecnia [email protected]
Catarina Fartaria, JETsj Geotecnia [email protected]
CASE STUDY: BIM AND GEOTECHNICAL PROJECT IN URBAN AREA – INFINITY TOWER, LISBON, PORTUGAL
www.jetsj.pt
VIENNA, AUSTRIA 2018CHINA-EUROPE CONFERENCE ON GEOTECHNICAL ENGINEERING
Parallel Session 10 – Underground Construction14th August 14:00-16:00Room 03/28
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TABLE OF CONTENTS
1. Introduction
2. Infinity Tower Project
3. Proposed Earth Retaining Solution
4. Design Methodology
5. Final Remarks
CHINA-EUROPE CONFERENCE ON GEOTECHNICAL ENGINEERING, VIENNA 2018
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1. INTRODUCTION
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1. INTRODUCTIONLOCATION
WW Drainage Tunnel
Site area4.600m2
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TABLE OF CONTENTS
1. Introduction
2. Infinity Tower Project
3. Proposed Earth Retaining Solution
4. Design Methodology
5. Final Remarks
CHINA-EUROPE CONFERENCE ON GEOTECHNICAL ENGINEERING, VIENNA 2018
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2. INFINITY TOWER PROJECT
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❑ The future tallest modern building
of Lisbon will feature 26 floors
and 4 basements.
❑ An iconic building in Lisbon’s
skyline with an impressive
contemporary architecture.
https://www.infinity-tower.com/
ARCHITECTURAL FEATURES
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GEOTECHNICAL FEATURES
❑ Heterogeneous Urban Fills.
❑ About 20m excavation depth
intersecting Urban Fills and the
Lisbon Volcanic Complex: mainly
basalts and clay tuffs
❑ Lisbon Volcanic Complex: formed
72 million years ago by several
important volcanic episodes,
showing mainly basaltic sheets,
volcanic tuffs, pyroclasts, volcanic
breccias, etc,
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Basalts
Tuffs
Landfills
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TABLE OF CONTENTS
1. Introduction
2. Infinity Tower Project
3. Proposed Earth Retaining Solution
4. Design Methodology
5. Final Remarks
CHINA-EUROPE CONFERENCE ON GEOTECHNICAL ENGINEERING, VIENNA 2018
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3. PROPOSED EARTH RETAINIG SOLUTION
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❑ Geotechnical and Geological: Landfills + Lisbon Volcanic Complex.
❑ Topographic: small hill.
❑ Surrounding Infrastructures: Alcantara WW Drainage Tunnel.
❑ Surrounding Infrastructures: Roads + Roadway Viaduct.
❑ Surrounding Infrastructures: Railway Line.
MAIN RESTRAINTS
WW Drainage Tunnel
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❑ The ground characterization was made through 9 boreholes with SPT
tests, continuous sampling collection for laboratory tests and
piezometers.
❑ The area is covered by a landfill deposit layer, over the Lisbon
Volcanic Complex (LVC).
❑ 4 main geotechnical Zones were established:
➢ ZG1, regarding the landfill layer;
➢ ZG2 for pyroclastic tuffs and low-quality basalts;
➢ ZG3 and ZG4 for medium to high-quality basalts.
GEOTECHNICAL AND GEOLOGICAL
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GEOTECHNICAL AND GEOLOGICAL
9 boreholes location
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GEOTECHNICAL ZONES - ZG
Geotechnical
ZoneDescription
γ
(kN/m3)
Ø’
(º)
c’
(kPa)
Es
(MPa)
ZG1 Landfill (5≤NSPT≤17) 18 30 0 15
ZG2
Pyroclastic tuffs and low-quality
basalts W4 to W3-4; F5 to F4-5
with recovery ranging from 60% e
100% e RQD=0%
22 33 50 65
ZG3
Basalts W3 to W3-2, F4 to F4-5,
with 90% recovery ranging and
20% ≤RQD≤75%, interbedded
with basalts W3-2, F4-5 with
100% recover and
47%≤RQD≤74%
22 37 80 120
ZG4Basalts W3-2 to F4-3, with 100%
recovery and 56%≤RQD≤76%22 45 100 150
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TOPOGRAPHY
❑ The existing topography, with the building location laying over a small hill,
leads to an excavation depth ranging from 18m to 7m at the opposite
alignments
Railway line
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MAIN RESTRAINTS – Topography
Railway Line + Roadway Viaduct Viaduct
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MAIN RESTRAINTS – Surrounding Infrastructures
Alcantara Stream, 1912
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MAIN RESTRAINTS – Surrounding Infrastructures
Alcantara Waste Water Drainage Tunnel, 1945
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MAIN RESTRAINTS – Surrounding Infrastructures
Alcantara Waste Water Drainage Tunnel, close to excavation pit
WW Drainage Tunnel
Excavation pit
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❑ The solution was proposed considering the existing restraints, with the following
purposes:
PROPOSED SOLUTION
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❑ The solution was proposed considering the existing restraints, with the following
purposes:
❑ Control the ground deformation;
❑ To minimize the interferences with the surrounding infrastructures and services;
❑ Improve Safety + Decrease Schedule + Decrease Costs.
PROPOSED SOLUTION
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❑ The solution was proposed considering the existing restraints, with the following
purposes:
❑ Control the ground deformation;
❑ To minimize the interferences with the surrounding infrastructures and services;
❑ Improve Safety + Decrease Schedule + Decrease Costs.
❑ Bored Pilled Wall solution with 600mm diameter pile and a plan space ranging
between 0.80m and 1.20m.
❑ The total pile’s depth ranges from 21.60m to 10.30m, all with a minimum
embedment length of 4.00m.
PROPOSED SOLUTION
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❑ The ground between the piles will be lined by a shotcrete layer of 150mm
minimum thickness
❑ Geodrain pipes with 3m length will be installed with a minimum of 3.60m plan
distance in order to ensure the ground drainage.
PROPOSED SOLUTION
Piles Ø0,60m1,2m 1,2m
Lining layer
Ventilation and drainage boxSolution plan
Geodrain pipes
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❑ In the west view, the wall will be braced by one level of temporary ground
anchors to be installed at level -2 with 3.60m plan space.
❑ The remaining excavation alignments will be stabilized with slab bands of 12m
width and 0.35m minimum thickness, compatible with both the architecture
and structural solutions.
PROPOSED SOLUTION
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❑ The slab bands will be
supported by vertical steel
profiles HEB260 embed in
600mm bored piles, 4m
below the excavation final
level.
PROPOSED SOLUTION
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❑ The slab bands will be
supported by vertical steel
profiles HEB260 embed in
600mm bored piles, 4.00m
below the bottom level of
excavation.
❑ The slab bands above level
-2 will be supported by
slimmer slab strips of
aboute 7m width that will
react against the piles wall
at the west view.
PROPOSED SOLUTION
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TABLE OF CONTENTS
1. Introduction
2. Infinity Tower Project
3. Proposed Earth Retaining Solution
4. Design Methodology
5. Final Remarks
CHINA-EUROPE CONFERENCE ON GEOTECHNICAL ENGINEERING, VIENNA 2018
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4. DESIGN METHODOLOGY
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DESIGN METHODOLOGYP
rep
ara
tio
n
Units
Phasing
Levels
Geolocation
To
po
gra
ph
yEarthworks quantities
Restraints
Str
uc
ture
Bored Piles
Slab bands
RC beams
Steel profiles
Ground anchors A
na
lysis
Plaxis
SAP2000
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DESIGN METHODOLOGY
BIM
Information
“n”DModels
Inter-operability
Collaboration
Level of Development
(LoD)
❑ Information
Centralized in the 3D objects.
❑ “n”D Models
Time (4D), Budget (5D), Sustainability and
facility management (6D and 7D).
❑ Interoperability
Capacity to seamlessly exchange information
within different platforms.
❑ Collaboration
Promotes an early stage design team-up.
❑ Level of Development
Level of information associated with the objects.
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❑ Among the elements received was
the architecture project geometry
in a 3D BIM model.
❑ The existing topography was
modeled in the BIM software.
DESIGN METHODOLOGY
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❑ Among the elements received was
the architecture project geometry
in a 3D BIM model.
❑ The existing topography was
modeled in the BIM software.
❑ The architecture model was linked
to the file and the geographic
position of the surface was
coordinated with the architecture
model and the existing lot
boundary and topography.
DESIGN METHODOLOGY
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DESIGN METHODOLOGY
❑ The modeling of the bored piles wall was done
according to the architecture 3D BIM model.
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DESIGN METHODOLOGY
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❑ The solution was evaluated using the geotechnical software (PLAXIS2D)
❑ Displacements and efforts were estimated and analyzed considering the
geotechnical zones and correspondent parameters.
DESIGN METHODOLOGY
Plaxis Output
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SAP2000 MODEL IMPORTED FROM A 3D BIM FILE
❑ The geometry of the slabs were exported to a structural analysis software
(SAP2000) using an IFC file type.
❑ Loads obtained from the PLAXIS2D were introduced on the SAP2000 model
and the deformations compatibility was checked on a iterative way
SAP2000 Model
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TABLE OF CONTENTS
1. Introduction
2. Infinity Tower Project
3. Proposed Earth Retaining Solution
4. Design Methodology
5. Final Remarks
CHINA-EUROPE CONFERENCE ON GEOTECHNICAL ENGINEERING, VIENNA 2018
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5. FINAL REMARKS
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❑ The use of BIM methodology allowed an accurate coordination with the
architecture and others engineering projects and promoted efficiency in terms
of project documentation, especially when changes were needed.
❑ The interoperability among software allowed that the geometry from the 3D
BIM model could be exported.
❑ The 3D visualization of the project and the restrains helped to find out the best
engineering solutions, including the compatibility check between the several
architecture and engineering solutions.
❑ The BIM model will be a very useful at both the construction and the building
maintenance / management under operation phases
FINAL REMARKS
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CHINA-EUROPE CONFERENCE ON GEOTECHNICAL ENGINEERING, VIENNA 2018
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