张永强, 毛彦龙, 陈冲. 2018: 深基坑支护对邻近建筑物基础稳定性的数值模拟分析. 工程地质学报, 26(s1): 310-315. DOI: 10.13544/j.cnki.jeg.2018188
    引用本文: 张永强, 毛彦龙, 陈冲. 2018: 深基坑支护对邻近建筑物基础稳定性的数值模拟分析. 工程地质学报, 26(s1): 310-315. DOI: 10.13544/j.cnki.jeg.2018188
    ZHANG Yongqiang, MAO Yanlong, CHEN Chong. 2018: NUMERICAL SIMULATION ANALYSIS OF DEEP FOUNDATION PIT SUPPORT FOR THE STABILITY OF ADJACENT BUILDING FOUNDATION. JOURNAL OF ENGINEERING GEOLOGY, 26(s1): 310-315. DOI: 10.13544/j.cnki.jeg.2018188
    Citation: ZHANG Yongqiang, MAO Yanlong, CHEN Chong. 2018: NUMERICAL SIMULATION ANALYSIS OF DEEP FOUNDATION PIT SUPPORT FOR THE STABILITY OF ADJACENT BUILDING FOUNDATION. JOURNAL OF ENGINEERING GEOLOGY, 26(s1): 310-315. DOI: 10.13544/j.cnki.jeg.2018188

    深基坑支护对邻近建筑物基础稳定性的数值模拟分析

    NUMERICAL SIMULATION ANALYSIS OF DEEP FOUNDATION PIT SUPPORT FOR THE STABILITY OF ADJACENT BUILDING FOUNDATION

    • 摘要: 深基坑工程在城市建设中扮演着重要地位。在建筑物密集的城市中心开展深基坑工程,不仅确保基坑自身的安全与稳定,还要保证邻近建筑物基础的稳定。本文以某深基坑支护为例,结合有限元软件-Midas GTS NX,采用修正-莫尔-库仑本构模型,运用两种支护形式建立三维有限元模型,分析深基坑开挖与支护过程中自身支护结构、基坑周围土体以及邻近建筑物基础变形规律。分析结果表明:(1)基坑开挖过程中两种支护形式对邻近建筑物基础结构影响差异性较小,但两种支护结构内力存在明显差异性;(2)基坑开挖过程中最大的沉降位置并未发生在坑边,而是发生在距坑边2 m左右的位置处;(3)基坑开挖过程中地表沉降与距基坑边的距离近似呈线性分布。

       

      Abstract: Deep foundation pit engineering plays an important role in urban construction. To implement deep foundation pit engineering in a densely populated city center, not only ensures the safety and stability of the foundation pit itself, but also ensures the stability of the adjacent building foundation. Taking a deep foundation pit support as an example, combined with the finite element software-Midas GTS NX,the modified-molar Coulomb constitutive model is used to establish a three-dimensional finite element model using two support forms to analyze the deep foundation pit excavation and support, including the self-supporting structure, the soil surrounding the foundation pit and the deformation law of the adjacent building foundation. The results show:(1)During the excavation of the foundation pit, the two types of support forms has little difference to the adjacent building's raft foundation, but there are significant differences in the internal forces of the two supporting structures. (2)The maximum surface settlement during the excavation of the foundation pit is not at the edge of the foundation pit, but occurs at a position about 2m from the edge of the pit. (3)The surface settlement during foundation excavation is approximately linear with the distance from the edge of the foundation pit.

       

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