| 吴坤铭.拉锚地连墙支护深基坑的稳定性分析与优化设计[J].安徽建筑大学学报,2021,29(): |
| 拉锚地连墙支护深基坑的稳定性分析与优化设计 |
| On the Stability Analysis and Optimal Design of Deep Foundation Pit Supported by Diaphragm Wall |
| 投稿时间：2021-05-21 修订日期：2021-06-29 |
| DOI： |
| 中文关键词: 有限元法 拉锚地连墙 稳定性分析 优化设计 |
| 英文关键词: finite element method diaphragm wall stability analysis optimal design |
| 基金项目:安徽高校自然科学研究重点项目（KJ2019A0620） |
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| 中文摘要: |
| 拉锚地连墙是进行深基坑支护的一种重要型式，分析拉锚地连墙支护深基坑在开挖施工过程中的稳定性，并进行拉锚地连墙的优化设计对深基坑工程具有重要的理论指导意义。论文采用有限元法对拉锚地连墙支护深基坑进行开挖过程的稳定性分析及优化设计。以板单元模拟地连墙，以界面单元模拟地连墙与周边岩土体的接触面，采用点对点锚杆单元与嵌入式排梁单元分别模拟预应力锚杆的自由段及锚固段。在稳定性分析过程中，考虑了不同施工工况下预应力锚杆的设置，进行了塑性及安全稳定性分析。工程算例分析表明，有限元法可以充分考虑基坑与拉锚地连墙支护结构的几何模型、荷载、结构单元和界面特性等，基于有限元法能较好地进行拉锚地连墙深基坑支护结构的优化设计。 |
| 英文摘要: |
| Diaphragm wall is an important type of deep foundation pit support. The stability analysis of deep foundation pit supported by diaphragm wall during the excavation and construction process and the optimal design during deep foundation pit engineering process have important theoretical guiding significance. The paper uses the finite element method to analyze the stability of the excavation process and optimize the design of the deep foundation pit supported by diaphragm wall. The slab element is used to simulate the diaphragm wall. The interface unit is used to simulate the contact surface between the wall and the surrounding rock and soil. The point-to-point anchor unit and the embedded row of beam unit are used to simulate the free section and the anchor section of the prestressed anchor respectively. In the process of stability analysis, the setting of prestressed anchor rods under different construction conditions is considered, and plasticity and safety stability analysis are carried out. The analysis of engineering examples shows that the finite element method can fully consider the geometric model, load, structural unit and interface characteristics of the deep foundation pit supported by diaphragm wall. Based on the finite element method, the optimal design of the supporting structure of the deep foundation pit supported by diaphragm wall can be better carried out. |
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