本文選題：內支撐支護　切入點：計算原理　出處：《長安大學》2014年碩士論文　論文類型：學位論文

【摘要】：基坑工程是目前巖土工程領域的難點和熱點問題之一，國內外專家學者已做了大量的分析研究工作，取得了一些有重要意義的成果。本文以實際工程項目為依托，通過對支護結構計算理論和有限元理論的歸納總結，得出了基坑開挖問題的一般性理論和計算方法。并采用MIDAS/GTS有限元軟件對基坑的分步開挖過程進行了數值仿真分析，，對基坑開挖過程中基坑及支護結構的變形與內力進行了分析研究。 本文的主要研究工作如下： 1對排樁支護的計算理論進行了較為全面、系統(tǒng)的分析和研究。對土壓力的計算理論，支護結構的計算方法及支護結構的破壞及變形機理進行了歸納總結。 2．以內蒙古赤峰市南二環(huán)項目金家寨地道橋工程為依托，利用有限元軟件midas/gts建立了模擬基坑開挖過程的有限元分析模型，對基坑受力過程進行仿真分析，模型中考慮了排樁、支撐和土體三者間的共同作用。將計算結果通規(guī)范規(guī)定進行了比較分析，確定了合理的排樁支護結構參數。 3．根據數值軟件的計算結果，研究土體本構及支護結構中的幾個重要參數對計算結果的影響規(guī)律，為深基坑支護設計中合理選取模型參數提供必要的參考依據。 4．根據以上理論的闡述和實際工程的計算，最后提出一些相應的結論和建議，為實際工程中的基坑計算的推廣應用和安全結構設計提供理論基礎和計算依據。
[Abstract]:Foundation pit engineering is one of the difficult and hot issues in the field of geotechnical engineering at present, domestic and foreign experts and scholars have done a lot of research, and obtained some important results. Based on the actual engineering project, through theoretical calculation and finite element theory of retaining structure are summarized, the problems of foundation pit the excavation of the general theory and method of calculation. And using MIDAS/GTS finite element software for foundation pit excavation process was analyzed by numerical simulation. In the process of excavation and supporting structure deformation and internal force of foundation pit excavation are analyzed.
The main research work of this paper is as follows:
1, a comprehensive and systematic analysis and research is carried out for the calculation theory of row pile support. The calculation theory of earth pressure, the calculation method of support structure and the failure and deformation mechanism of supporting structure are summarized.
2. in Inner Mongolia Chifeng City, South Second Ring Road Project Jinjiazhai tunnel bridge project, established the finite element analysis model for the simulation of excavation process by using finite element software midas/gts, the stress of excavation process simulation model considering the pile senior high school entrance examination, the interaction of soil and support among the three. The calculation results through specification the provisions of the comparative analysis, to determine the parameters of row pile retaining structure reasonable.
3., according to the calculation results of numerical software, the influence rules of several important parameters in soil constitutive and supporting structures on the calculation results are studied, which provides a necessary reference for reasonable selection of model parameters in deep foundation pit support design.
4., according to the above theory and the calculation of actual project, finally, it puts forward some corresponding conclusions and suggestions, which will provide theoretical basis and calculation basis for the popularization and application of foundation pit calculation and the design of safety structure in practical engineering.

【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU753

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本文編號：1637047