Three-Dimensional Numerical Investigations of Ground Movements of Taipei 101 Deep Excavation

國立中興大學水土保持學系研究所九十九學年度第二學期

專討四授課老師 : 陳文福 教授指導老師 : 林德貴 教授

學生 : 蔡怡臻 學號 : 7098042018

2011/6/10土石流防災中心地下室

Methodology

Soil Model

Field Description and Construction

Introduction

OutlineOutline

2

Introduction

3

IntroductionIntroduction

Based on the actual construction sequences, a three-dimensional (3-D) deformation analysis was performed to simulate the ground movement of deep excavation in Taipei 101 construction project. In 3-D analysis, an optimized geometry model and mesh density was adopted according to the convergence study to achieve a computation with high efficiency and accuracy.

This paper is divided into three parts: data collection, calibration of 3-D numerical model of Taipei 101 deep excavation and investigations of various numerical models.

4

Methodology

5

Flow ChartFlow Chart

6

Data Collection of Taipei 101 Deep Excavation

Site Investigations and Soil Tests(1) boring and exploration of subsoil(2) laboratory tests (DST, TRT, PMT)(3) field tests (SPT, PM, LLT, VST)

Deep Excavation Construction(1) tower zone and podium zone(2) construction sequence(3) diaphragm wall (D-wall)(4) buttress wall(5) supporting system (bottom-up and top-down)(6) bored pile foundation

Monitoring and Instrumentation(1) lateral displacement(2) ground settlement(3) pore water pressure(4) internal force of diaphragm wall and supporting strut

Data Processing(1) photos (construction and field site)(2) lateral displacement-depth(3) ground settlement-distance(4) pore water pressure-time(5) material model parameters (soil, reinforced concrete, steel structure)

A

B

Calibration of 3-D Numerical Model of Taipei 101 Deep Excavation

Establishment of 3-D Numerical Model(1) full-scale (tower zone &podium zone)(2) retaining system(3) supporting system(4) foundation system

Numerical Results Coincidewith Measurements

(1) soil model parameters(2) structural model parameters

(1) dimension of geometry(2) initial condition(3) boundary condition(4) construction sequences

Parametric Study of Deep Excavation(1) soil model parameters(2) structral model parameters

Sensitivity Analysis(1) lateral movement – depth(2) ground settlement - distance

Evaluation of the Effects of Soil and Structural Model Parameters

Sensitivity Parameters(1) (h)soil

(1) (h)structure

Yes

No Noadjustment adjustment

B

7

Flow ChartFlow Chart

Field Description and Construction

8

Brief of deep excavation of Taipei 101 Brief of deep excavation of Taipei 101 construction projectconstruction project

9

Excavation configuration and selected Excavation configuration and selected zones and sections for numerical analyseszones and sections for numerical analyses

10

Podium Tower

Construction ProcedureConstruction Procedure

11

Soil Model

12

SoilSoil ModelModel

13

Soft Soil Creep Model

Hardening Soil Model with small strain

Mohr-Coulomb

Soil ModelSoil Model

14

Hardening Soil Model with small strain

Soil ModelSoil Model

15

Soft Soil Creep Model

Cc

Cs

C α

16

17