scholarly journals Empirical Method and Finite Element Analysis of Deep Foundation Pit Excavation in Ningbo Soft Soil

2019 ◽  
Vol 267 ◽  
pp. 032060
Author(s):  
Bo Wu ◽  
Yiyong Peng ◽  
Guowang Meng ◽  
Wei Huang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Soft Soil ◽  
Empirical Method ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Element Analysis ◽  
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

Finite Element Analysis and Investigation of Double-Row Piles Supporting Structure

2013 ◽  
Vol 838-841 ◽  
pp. 779-785
Author(s):  
Liang Gu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Maximum Shear Stress ◽  
Horizontal Displacement ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Double Row ◽  
Element Analysis ◽  
Supporting Structure

The double-row piles supporting structure is a new type of supporting and protecting for deep foundation excavation. It is widely used to in design of deep foundation pit. Now how to simply and effectively design the structure of double-row piles is in a research and discuss stage. Using the Midas GTS finite element method, the displacement and stress distribution of double-row piles in the different stages of excavation are obtained, and the horizontal displacement and stress distribution of double-row piles in the different stages of excavation are calculated. The results of Midas GTS finite element analysis as follows: (1) after the excavation of foundation pit, the horizontal displacement of pile-top is maximum. The horizontal displacement decreases gradually with depth increases. And the displacement of front row piles is larger than that of back row piles; (2) the maximum shear stress is at the distance 5m to the foundation basement. The higher bending moment at the pile-top and the distance 10m to the foundation basement are consistent with the actual monitoring date. (3) the results of finite element analysis is close to the Richard software and actual monitoring data. It is show that using the finite element analysis to analyze the double-row piles supporting structure with is veritable and credible.

Study on Composite Soil Nailing Wall in Soft Soil Area of Complex Condition with Emphasis on Analysis by Finite Element Analysis

2012 ◽  
Vol 174-177 ◽  
pp. 2020-2023 ◽  
Author(s):  
Bing Wang
Keyword(s):  
Finite Element ◽  
Soft Soil ◽  
Horizontal Displacement ◽  
Deep Foundation ◽  
Circular Area ◽  
Foundation Pit ◽  
Soil Nails ◽  
Deep Foundation Pit ◽  
Soft Soil Area ◽  
Soil Area

Based on a typical projects, the horizontal displacement in depth, horizontal displacement and vertical subsidence of pile top, and settlements of surrounding buildings are monitored with the process on digging of deep foundation pit. The study on digging process of foundation pit is analyzed by using finite element software. Using mapped meshing method, from mixing the pile near the semi-circular area (radius = 50m), the meshing appropriate encryption in order to improve the accuracy of the external semi-circular area (radius = 65m) mesh is less appropriate sparse.Layer by layer to kill the layers of the soil unit and activate the soil nails (spring element), the simulated excavation and synchronization of soil nails construction.Verify the arc form of failure surface in side of deep foundation pit in soft soil area. Which is valuable for reference to similar structure engineering of foundation pit.

Research on Seepage Characteristics of Deep Cut Canal under Dewatering Well

2013 ◽  
Vol 438-439 ◽  
pp. 588-592
Author(s):  
Kai Yun Yang ◽  
Xiang Yu Li ◽  
Lin Hao Li ◽  
Quan Long Li
Keyword(s):  
Finite Element ◽  
Element Model ◽  
Saturation Line ◽  
Deep Foundation ◽  
Seepage Field ◽  
Foundation Pit ◽  
Element Analysis ◽  
Deep Foundation Pit ◽  
Geological Conditions ◽  
Seepage Characteristics

In view of the problems of complex geological conditions with high underground water level, large permeability coefficient of soil and the presence of large seepage hazard of deep cut canal and deep foundation pit project of South-to-North Water Transfer Project, China, research on seepage characteristics of digging canals under dewatering well is carried out by finite element analysis, and the FORTRAN procedure is programmed. The three-dimensional finite element model of a digging canal is built, and the seepage field of the different conditions of the canal is simulated, the water head distribution, saturation line and leakages are obtained, and the rules and characteristics of steady seepage field under design impervious system are analyzed. The results indicate that the method can exactly determine the key overflow point and saturation line of canal, and well predict seepage field in canal. The results should be of guiding significance to design and construct retaining engineering in deep cut canal and deep foundation pit.

The Finite Element Analysis of the Deep Foundation Pit Excavation and the Model Test

2011 ◽  
Vol 368-373 ◽  
pp. 542-548
Author(s):  
Chi Yan ◽  
Ri Song Qin ◽  
Hong Yue Sun
Keyword(s):  
Finite Element ◽  
Strength Theory ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Element Analysis ◽  
Finite Element Program ◽  
Deep Foundation Pit ◽  
Calculation Results ◽  
Element Program ◽  
Fracture Theory

The fracture theory of soil was a new developing problem in recent year. In this paper, the basic principle of fracture mechanics and the strength theory of soil were combined, and the soil-cracking strength theory was adopted to build a constitutive relation for cracked soils. In order to use such theory and to analyze how the cracked soils effect on retaining structure, we developed an elastoplastic finite element program. Finally, the calculation results from this program were compared with the surveying measured in model testing.

Finite Element Study on Ring-Beam Supporting Structure of Deep Foundation Pit in Coastal Soft Soil Area

2012 ◽  
Vol 256-259 ◽  
pp. 1908-1911 ◽  
Author(s):  
Xi Yuan Liu ◽  
Wen Peng Cai ◽  
Ji Zhou ◽  
Xin Yan Wang
Keyword(s):  
Finite Element ◽  
Soft Soil ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Supporting Structure ◽  
Soil Settlement ◽  
Soft Soil Area ◽  
Stress And Deformation ◽  
Soil Area

Ring-beam supporting technology is increasingly used in coastal soft soil area. Based on a foundation pit supporting case of general hospital in Tianjin, the 3-dim finite element construction was simulated with MIDAS/GTS. According to the calculation, the stress and deformation characteristics of deep foundation pit supporting structure under the ring-beam action in soft soil area, and the surrounding soil settlement is analyzed. The final foundation pit supporting solution is selected between two different schemes. The analysis method and conclusions are useful for design and construction of other similar projects.

The Deformation Behavior Analysis for Deep Foundation Pit in Soft Soil Area Considering Seepage-Consolidation Coupling

2014 ◽  
Vol 926-930 ◽  
pp. 712-715
Author(s):  
Li Qiao Cao
Keyword(s):  
Finite Element ◽  
Deformation Behavior ◽  
Soft Soil ◽  
Biot Theory ◽  
Three Dimension ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Element Analysis ◽  
3D Finite Element ◽  
3D Finite Element Method

After a literature survey, the application of 3D seepage-consolidation coupling FEM model based on Biot theory and Cam-Clay model for simulating deep excavation dewatering in soft soil is studied. A foundation pit in East-China is taken as an example and 3D finite element method is used to simulate the dewatering and excavation. Through the 3D finite element analysis, the three-dimension numerical method can be applied to study the deformation behavior of foundation pit and surrounding soil. The numerical simulation experience and data presented in the paper can be refereed in the design, construction and research of similar projects.

The Analysis on Monitoring Data and Finite Element Simulation of the Deep Foundation Pit in Tianjin

2011 ◽  
Vol 243-249 ◽  
pp. 2543-2547
Author(s):  
Shi Lun Feng ◽  
Yong Han ◽  
Jun Li ◽  
Pu Lin Li ◽  
Jie Liu
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Retaining Wall ◽  
Soft Soil ◽  
Monitoring Data ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Element Simulation ◽  
Excavation Process

Through the analysis on monitoring data of the deep foundation pit in Tianjin, it was observed that the lateral deformation of the retaining wall at the corner was smaller than the deformation in the middle. Based on the analysis of the results drawn from finite element simulation of the excavation process and the monitoring data, appropriate supporting structure stiffness parameters values used in Plaxis and Qimingxing are recommended for designing deep foundation pits in soft soil area.

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