Study on coupling model for three-dimensional seepage and land subsidence of deep foundation pit dewatering

2014 ◽  
pp. 85-96
Keyword(s):  
Land Subsidence ◽  
Three Dimensional ◽  
Coupling Model ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit

Non-Linear Three-Dimensional Finite Element Analysis of Some Extremely Deep Foundation Pit Support

2013 ◽  
Vol 443 ◽  
pp. 79-83
Author(s):  
Zhen Xi Yu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Element Analysis ◽  
Deep Foundation Pit ◽  
Three Dimensional Finite Element ◽  
Support Engineering

In recent years, with the enhancement of overall national strength in China, the computer simulation technology has been developed rapidly and widely applied to engineering construction. Particularly, investment proportion of the technology in deep foundation pit engineering is immense. Yet affected by national conditions in China, the construction and application of deep foundation pit engineering have many extensive factors. It also results in insufficient vigor of finite element analysis of deep foundation pit support construction. In this way, construction problems arise frequently under the condition that there exist buildings around. With some deep foundation pit support engineering, the thesis conducts simulation analysis of the engineering through the technology of nonlinear three-dimensional finite element.Project profile

Numerical simulation of deep foundation pit dewatering and optimization of controlling land subsidence

2010 ◽  
Vol 114 (3-4) ◽  
pp. 251-260 ◽  
Author(s):  
Nianqing Zhou ◽  
Pieter A. Vermeer ◽  
Rongxiang Lou ◽  
Yiqun Tang ◽  
Simin Jiang
Keyword(s):  
Numerical Simulation ◽  
Land Subsidence ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit

scholarly journals Finite-Difference Numerical Simulation of Dewatering System in a Large Deep Foundation Pit at Taunsa Barrage, Pakistan

2019 ◽  
Vol 11 (3) ◽  
pp. 694 ◽  
Author(s):  
Ijaz Ahmad ◽  
Muhammad Tayyab ◽  
Muhammad Zaman ◽  
Muhammad Anjum ◽  
Xiaohua Dong
Keyword(s):  
Hydraulic Conductivity ◽  
Finite Difference ◽  
Three Dimensional ◽  
Rehabilitation Program ◽  
Diaphragm Wall ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Constant Head ◽  
Design Depth

This study investigates a large deep foundation pit of a hydraulic structure rehabilitation program across the Indus river, in the Punjab province of Pakistan. The total area of the construction site was 195,040 m2. Two methods, constant head permeability test and Kozeny–Carman equation, were used to determine the hydraulic conductivity of riverbed strata, and numerical simulations using the three-dimensional finite-difference method were carried out. The simulations first used hydraulic conductivity parameters obtained by laboratory tests, which were revised during model calibration. Subsequently, the calibrated model was simulated by different aquifer hydraulic conductivity values to analyze its impact on the dewatering system. The hydraulic barrier function of an underground diaphragm wall was evaluated at five different depths: 0, 3, 6, 9, and 18 m below the riverbed level. The model results indicated that the aquifer drawdown decreases with the increase in depth of the underground diaphragm wall. An optimal design depth for the design of the dewatering system may be attained when it increases to 9 m below the riverbed level.

Research on Deformation Monitoring on Supporting Structure of Deep Foundation Pit Engineering Based on GPS

2012 ◽  
Vol 239-240 ◽  
pp. 595-598
Author(s):  
Zhong Xin Liu ◽  
Xue Jian Zhang
Keyword(s):  
Effective Means ◽  
Three Dimensional ◽  
Automatic Monitoring ◽  
Deformation Monitoring ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Supporting Structure ◽  
Observation Methods ◽  
Safety Warning

High-rise building deep foundation pits affect the peripheral physiognomy deformations directly, and brings serious hidden danger．deformation monitoring on supporting structure of deep foundation pits engineering is an effective means of construction safety warning. Three-dimensional coordinates of observation points can be available by GPS high precision positioning, and it is easier to realize of continuous, real-time and automatic monitoring than conventional observation methods.

Analysis of Three-Dimensional Effects for Deep Foundation Pit with FLAC3D

2012 ◽  
Vol 256-259 ◽  
pp. 328-331
Author(s):  
Lin Zhang ◽  
Ming Xuan He
Keyword(s):  
Three Dimensional ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Dimensional Effects

Using FLAC3D Software for Analysis of Foundation Pit, the Stress that Caused by Sidewall Displacement of Foundation Pit Has Been Analyzed. the Influence Scope and its Rules of Foundation Pit Three-dimensional Effects Were Obtained.

scholarly journals Optimization method and application research of dewatering design for complicated foundation pits

2019 ◽  
Vol 275 ◽  
pp. 03001
Author(s):  
Zhengyong Liu ◽  
Biao Li
Keyword(s):  
Three Dimensional ◽  
Optimization Method ◽  
Simulation Methods ◽  
Application Research ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
System A ◽  
Economical Design ◽  
Numerical Simulation Methods

The groundwater control system of complex deep foundation pit engineering is designed based on experience and analysis of items such as dewatering, anti-inrushing, water-recharging, etc. Three-dimensional numerical simulation methods are used to optimize the design. By repeatedly adjusting the design items and simulating the working system, a safer, more reasonable and economical design scheme can be confirmed by comparing the analysed results.

Metro Station Deformation Caused by Deep Foundation Pit Construction

2014 ◽  
Vol 580-583 ◽  
pp. 1061-1064
Author(s):  
Chun Lei Xin ◽  
Bo Gao
Keyword(s):  
Numerical Simulation ◽  
Three Dimensional ◽  
Simulation Method ◽  
Main Body ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Metro Station ◽  
Deep Foundation Pit ◽  
Construction Methods ◽  
Transfer Station

Many excavation and backfill methods can be used to construct a deep foundation pit, but foundation pit construction will undoubtedly affects security of existing metro station. This research based on a transfer station of Chengdu Metro, three-dimensional numerical simulation method was used to analyze the deformation of metro station by changing construction methods of foundation pit. The results show that: (1) Both excavation and backfill methods of foundation pit have a significant effect on connection segments of metro station. (2) The main body of metro station is largely unaffected by foundation pit construction but it has been in the process of subsidence. (3) The more the construction steps of foundation pit are, the more slowly the displacement of metro station changes. The above results certainly contribute to research and develop new types of construction methods for complicated metro station.

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