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Study on the Displacement of the Surrounding Soil Mass in Foundation Excavation Engineering

Author: LiJia
Tutor: XiaBaiRu
School: Chinese Geology University (Beijing)
Course: Geological Engineering
Keywords: Deep foundation Distortion Control Digital photography Measuring rope method Calculation methods
CLC: TU753
Type: Master's thesis
Year: 2011
Downloads: 93
Quote: 0
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Abstract


Urban Underground Space Development and construction of high-rise buildings , and had a lot of deep excavation . Deep foundation works are mostly in the city are in the dense buildings , narrow construction site the pit surrounding buildings higher deformation requirements , design theory , ( intensity control design ) Pit difficult to meet environmental requirements . In recent years, many scholars in the pit engineering deformation control do a lot of research about pit during excavation pit deformation pit surrounding ground displacement and near the building deformation among relations law , there are many problems to be solved . This article rely on the China Academy of Building Research the urban underground space construction impact on the surrounding environment and control technology research \the structure of the different forms of deformation , the displacement of the soil behind the retaining structure research , and through the the Yunnan \observed surrounding soil displacement and settlement , through a comprehensive analysis of the two trials , the following conclusions : 1 , retaining structures , surface subsidence in the same deformation mode curve shape . Surface subsidence increases with the increase in the overall amount of displacement of retaining structures . The size of the amount of deformation of the retaining structure of the range of surface subsidence can be ignored . 2 , retaining structures in the same deformation mode , with the change of the retaining structures displacement area , the maximum surface subsidence and retaining structures displacement is proportional to the area , but the same maximum displacement position . 3 different types of soil ( sandy soil or clayey soil ) , retaining structure displacement form of the same , the sandy soil of the ground subsidence greater than clay, small sphere of influence than the cohesive soil and maximum points to the distance of the baffle less than cohesionless soil , cohesive soil ground subsidence curves gentle than the sandy soil . This paper, a calculation method to determine the three unknown parameters , the prediction of surface subsidence pit excavation . This article by indoor model test and field test concluded forecast pit excavation of soil around the deformation as well as the influence of the surrounding buildings have a certain referential significance .

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CLC: > Industrial Technology > Building Science > Construction > The project and the type of work > Foundation engineering
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