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The Theoretical Analysis and Field Test of PARS

Author: BaiJinJie
Tutor: WuXiongZhi
School: Hebei University of Engineering
Course: Structural Engineering
Keywords: Pile-anchor Field Test Pile force Crown beam displacement Coulomb earth pressure
CLC: TU476
Type: Master's thesis
Year: 2009
Downloads: 85
Quote: 0
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Abstract


With modern urban construction and development and technological progress , involving more and more deep excavation works , which PARS and effectiveness of its economic rationality in deep excavation has been widely used, but their design computational theory needs to be further improved, in Handan pile-anchor retaining structure for field test data , little. In this paper, Handan City, Cornell Building deep excavation engineering as the basis, calculated from the theoretical analysis , field test , numerical simulation three aspects of pile-anchor retaining structure calculation model , force structure deformation characteristics were further explored. Theoretical analysis, the analysis of previous studies based on the results of the pile anchor retaining structure calculation model selection, acting on the supporting structure of the earth pressure and put forward their own views ; Experimental research on Handan City, Cornell Building deep foundation pile anchor pile structural displacement and force field trials , a lot of field data , obtained crown beam displacement pile and pile internal force distribution and variation ; numerical analysis , the application of ABAQUS finite element software test pit has been calculated to further explore the pile displacement factor. Combined with theoretical calculations , field experimental data and numerical results on the pile anchor a systematic study of the structure , the main conclusions and results obtained are as follows: ( 1 ) via the elastic method and the classical method of calculation of the two theories of comparative analysis , combined with the measured data , the pile-anchor support design application flexibility method is relatively static balance method is more reasonable. ( 2 ) acting on the supporting structure of the soil pressure should consider the impact of displacement , obtained Coulomb earth pressure based on theoretical considerations pile displacement earth pressure calculation formula , the calculation model more in line with the structure of the pile anchor actual stress state. ( 3 ) Field tests showed that the crown beam displacements and internal forces are present pile effects of time and space , and come to crown beam displacements and internal forces pile excavation conditions change with changes in the law occur , anchor prestress can effectively reduce crown beam displacement and pile forces . ( 4 ) application of numerical methods in ABAQUS pile-anchor retaining structure analysis and calculation is feasible displacement pile retaining structure with prestressed anchor stiffness and decreases .

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Foundation > The basis of the special form
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