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Composite soil nailing stability and deformation of soft soil area

Author: ChenJian
Tutor: ZhangYangSong
School: Nanjing University of Technology and Engineering
Course: Structural Engineering
Keywords: composed soil nails stability deformation FEM strength reduction method
CLC: TU470.3
Type: Master's thesis
Year: 2007
Downloads: 144
Quote: 1
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Abstract


The technique of strut frame made of composed soil nails comes from the combination of the developing technique of strut frame made of soil nails and other traditional methods of strut frame. It is certificated in the engineering practice that this technique not only is economically easy to control and completed, such as the other methods of strut frame, but also breaks the applicability of common method of strut frame, which assures the wider applicability and foreground of the technique of strut frame made of composed soil nails.In this thesis, with regard to the stability and deformation of the strut frame made of composed soil nails in soft clay foundation pit, the studies listed below are carried out, considering current research and design status of the soil nailed retaining structure.1、This paper begins with the concept of the strut frame made of composed soil nails, analyzing the composition and the technique of the construction of the strut frame made of composed soil nails.2、According to the constructional feature of the constitution of the soil nails, the computation mode of the strut frame made of composed soil nails is set up to analyze the strut frame made of composed soil nails when it is stressed. With the engineering data, the strut frame made of composed soil nails is analyzed with FEM including the stability and deformation of the strut frame made of composed soil nails.3、The stability of the strut frame made of composed soil nails is discussed by 3D FEM with strength reduction method.4、The hardening soil model is introduced to simulate the characteristics of soils under the unloading condition. With 3D FEM the deformation of the strut frame made of composed soil nails is studied, including horizontal displacement and vertical displacement of the bottom and the top of the foundation pit.5、Considering different factors, for example ,the variation of the length and the separation of the soil nails, and the diametric of the mixing piles on the strut frame made of composed soil nails is how to affect the stability and deformation of the strut frame made of composed soil nails.

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Foundation > The foundation and basis for the theory and computational > Calculation, analysis
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