Numerical Simulation Research on the Mechanical Process of Pile-Anchor Retaining Deep Building Foundation Pit

2013 ◽  
Vol 353-356 ◽  
pp. 421-425 ◽  
Author(s):  
Bao Xue Shan ◽  
Lu Chao Liu ◽  
Cui Wei
Keyword(s):  
Numerical Simulation ◽  
Design Theory ◽  
Internal Force ◽  
Monitoring Data ◽  
Foundation Pit ◽  
Retaining Structures ◽  
Simulation Research ◽  
Mechanical Process ◽  
Economical Design ◽  
Building Foundation

In this paper, based on an actual pit excavation project, the mechanical process of excavating and retaining is simulated. Combined with the monitoring data, the stress, displacement of soil and internal force of retaining structures are analyzed, and the characteristics of deformation and force are summarized. This research offers references for safe and economical design and construction, and helps to improve the design theory of foundation pit support.

On Numerical Simulation of the Stepped Soil-Nail Wall

2013 ◽  
Vol 353-356 ◽  
pp. 692-695
Author(s):  
Chang Zhi Zhu ◽  
Quan Chen Gao
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Internal Force ◽  
Numerical Results ◽  
Analysis Model ◽  
Foundation Pit ◽  
Soil Nails ◽  
Soil Nail ◽  
Soil Nail Wall ◽  
Design And Construction

Based on an Engineering Example which was supported by the stepped soil-nail wall, a numerical analysis model was established by FLAC3D,and the process of the excavation and supporting was simulated, and the numerical results of the soil nails internal force and foundation pit deformation were obtained. The simulated result was consistent with the measured results. It shows that the method of FLAC3D numerical analysis can be used to the numerical analysis of foundation pit excavation and supporting, and it will provide the basis for the design and construction of practice project.

Foundation Pit Excavation on Surrounding Buildings Effect Analysis

2013 ◽  
Vol 300-301 ◽  
pp. 950-954
Author(s):  
Qing Zhang ◽  
He Ming Cheng ◽  
Yue Gui ◽  
Jing Cao
Keyword(s):  
Surface Deformation ◽  
Ground Surface ◽  
Internal Force ◽  
Theory Model ◽  
Interaction Theory ◽  
Foundation Pit ◽  
Effect Analysis ◽  
Change Mechanism ◽  
Building Foundation ◽  
Internal Forces

In order to analyze the effect of foundation pit excavation on surrounding buildings, this paper researched the ground surface deformation surrounding excavation engineering, analyzed the buildings additional internal forces change mechanism and the coordination of the building foundation and the ground; The damage were researched on foundation subsidence, ground tilt, surface curvature, torsion and other factors on surrounding buildings and affiliated facilities after excavation. Established an interaction theory model of the buildings foundation and ground, used the model could calculate the changes of internal force and deformation of surrounding buildings caused by foundation pit excavation by selecting the reasonable foundation settlement equation or using the measured settlement data. So this paper provided a theoretical calculation method to engineers to calculate the effect of excavation engineering on surrounding buildings.

Filed Test Studies on Internal Force of Pile in Pile-Anchor Supporting System for Deep Foundation Pit

2011 ◽  
Vol 383-390 ◽  
pp. 7713-7717
Author(s):  
Chong Fu Wu ◽  
Chang Hong Li
Keyword(s):  
Limit Equilibrium ◽  
Internal Force ◽  
Pile Head ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Building Foundation ◽  
Zero Position ◽  
Prestressed Anchor ◽  
Variation Rule

Through the field test on the laboratory building foundation pit engineering of Northeastern University at Qinhuangdao, the distribution and variation rule of steel stress and pile moment is researched and analyzed in the process of the deep foundation pit excavation. The result shows that foundation pit excavation and applied prestressed anchor are the main factors of pile internal force change, furthermore, the latter is more effective than the former. Meanwhile, the influence of top beam to steel stress and moment of pile head can not be ignored especially. The zero position of steel stress and pile moment are basically same, which lies under foundation pit bottom. The use of limit equilibrium method more economical than elastic subgrade method in design over foundation pit bottom, however, which is opposite under it.

Numerical Simulation on a Deep-Foundation Pit of Shenzhen Holiday Plaza Project

2014 ◽  
Vol 937 ◽  
pp. 433-437
Author(s):  
Yi Zheng
Keyword(s):  
Numerical Simulation ◽  
Simulation Model ◽  
Engineering Application ◽  
Horizontal Displacement ◽  
Internal Force ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Strong Basis ◽  
Deep Foundation Pit ◽  
Wall Deformation

Based on test data of the prestressed anchor cable composite soil nailing wall deformation and internal force of structure of Shenzhen Holiday Plaza foundation pit, the numerical simulation model of foundation pit is established by FLAC3D software. Through the reasonable selection of soil constitutive model and structural unit, the numerical simulation model is consistent with the project practice. The simulation results on horizontal displacement of foundation pit, the internal force of the structure, the surface layer stress and damaged form are reasonable. This does not only provide a strong basis for the optimum design of the foundation pit, but also provide a scientific guidance for engineering application.

Coupled Numerical Simulation Research on Dewatering and Land Subsidence in Deep Foundation Pit

2013 ◽  
Vol 275-277 ◽  
pp. 1549-1552 ◽  
Author(s):  
Dong Dong Zhang
Keyword(s):  
Numerical Simulation ◽  
Land Subsidence ◽  
Coupled Model ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Simulation Research ◽  
Deep Foundation Pit ◽  
Space And Time ◽  
Design And Construction

With the construction of deep and large foundation pit, land subsidence disasters caused by dewatering in deep foundation pit become very serious. Using the coupled model of foundation pit dewatering and land subsidence and putting it into foundation pit dewatering construction, analyzes and summarizes the effect of land subsidence in space and time, which will provide references for the design and construction of foundation pit dewatering.

Study on the Deformation of Supporting Structure for Foundation Pit in Strata with Rock-Soil Combination

2012 ◽  
Vol 446-449 ◽  
pp. 1797-1803
Author(s):  
Ai Jun Yao ◽  
Xin Dong Zhang ◽  
Xian Jun Zou
Keyword(s):  
Numerical Simulation ◽  
Engineering Design ◽  
Horizontal Displacement ◽  
Internal Force ◽  
Lateral Deformation ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Supporting Structure ◽  
Site Monitoring

Taking the deformation of row pile supporting structure of foundation pit in strata with rock-soil combination as the research target and taking an open cut metro deep foundation pit as an example, by in-site monitoring and numerical simulation, analyze the horizontal displacement of retaining piles and the change law of steel support axial force in the strata with rock-soil combination, and summarize the change law of row pile supporting structure in the process of excavation under the conditions of this strata, so that to provide experience and guidance for similar engineering design and construction. The results show that: the structure of foundation pit has obvious effects on deformation and internal force of supporting structure, the result obtained from numerical simulation fits well with the tendency of monitoring data changing. In which, the deformation of row pile supporting structure in the middle and upper part of soil strata is larger, the deformation of middle and lower part of soil strata is comparatively smaller, the lateral deformation of row piles to basement has a tendency of gradual decreasing by taking the interface of rock-soil as a boundary.

scholarly journals Internal Force on and Deformation of Steel Assembled Supporting Structure of Foundation Pit under Thermal Stress

2021 ◽  
Vol 11 (5) ◽  
pp. 2225
Author(s):  
Fu Wang ◽  
Guijun Shi ◽  
Wenbo Zhai ◽  
Bin Li ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Bending Moment ◽  
High Strength ◽  
Element Model ◽  
Internal Force ◽  
Foundation Pit ◽  
Dimensional Finite Element ◽  
Influence Of Temperature On ◽  
Scale Experiment ◽  
Three Dimensional Finite Element

The steel assembled support structure of a foundation pit can be assembled easily with high strength and recycling value. Steel’s performance is significantly affected by the surrounding temperature due to its temperature sensitivity. Here, a full-scale experiment was conducted to study the influence of temperature on the internal force and deformation of supporting structures, and a three-dimensional finite element model was established for comparative analysis. The test results showed that under the temperature effect, the deformation of the central retaining pile was composed of rigid rotation and flexural deformation, while the adjacent pile of central retaining pile only experienced flexural deformation. The stress on the retaining pile crown changed little, while more stress accumulated at the bottom. Compared with the crown beam and waist beam 2, the stress on waist beam 1 was significantly affected by the temperature and increased by about 0.70 MPa/°C. Meanwhile, the stress of the rigid panel was greatly affected by the temperature, increasing 78% and 82% when the temperature increased by 15 °C on rigid panel 1 and rigid panel 2, respectively. The comparative simulation results indicated that the bending moment and shear strength of pile 1 were markedly affected by the temperature, but pile 2 and pile 3 were basically stable. Lastly, as the temperature varied, waist beam 2 had the largest change in the deflection, followed by waist beam 1; the crown beam experienced the smallest change in the deflection.

scholarly journals Numerical Simulation Research on Multi-field Coupling of Underground Energy Pile

2021 ◽  
Vol 1838 (1) ◽  
pp. 012061
Author(s):  
Qihui Zhou ◽  
Zhanjun Huang ◽  
Yong Wu ◽  
Huipeng Zhang ◽  
Yufeng Shi ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Simulation Research ◽  
Energy Pile ◽  
Field Coupling

Simulation of Excavation Process for Deep Foundation Pit Base on Nonlinear Finite Element Theory

2015 ◽  
Vol 744-746 ◽  
pp. 579-583
Author(s):  
Hui Min Wang ◽  
Zhen Jian Ji ◽  
Liang Cao ◽  
Ji Yao ◽  
Shan Guang Qian
Keyword(s):  
Finite Element ◽  
Safety Evaluation ◽  
Nonlinear Finite Element ◽  
Distribution Law ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Simulation Research ◽  
Deep Foundation Pit ◽  
Excavation Process ◽  
Element Theory

Deep Pit is the main content of modern urban geotechnical engineering. In this paper, based on a deep foundation pit engineering as an example, based on the nonlinear finite element theory, conduct a numerical simulation research for foundation pit excavation process. Obtained the distribution law of pit deformation, stress distribution and the supporting structure of the internal forces, under the various processes. These provide a theoretical basis for safety evaluation of foundation pit engineering.

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