基于周边既有建筑物承载能力的基坑变形控制标准

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摘要邻近既有建筑物由于基坑开挖引起的土体位移作用而产生附加变形。首先提出基坑开挖对邻近既有建筑物影响的位移控制有限元分析方法(DCFEM)，通过与离心模型试验的对比，验证其合理性。然后，对新修订的上海《基坑工程技术规范》的基坑环境保护标准进行探讨，通过算例分析，指出其不合理之处。最后，考虑建筑物自身的承载能力，采用DCFEM法进行分析，提出基于周边建筑物承载能力的基坑变形控制标准。

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关键词 ：基坑工程, 建筑物承载能力, 基坑开挖, 位移控制有限元, 基坑变形控制标准

Abstract：The excavation-induced soil movements will adversely affect nearby buildings and bring additional deformation. Firstly，a three-dimensional displacement control finite element method(DCFEM) is proposed to analyze the influences of excavation of foundation pits on adjacent buildings；and the rationality of the method is proved by comparing with published centrifuge model tests. Then，the environment protection criterion for excavation，i.e. new revision Technical Code for Excavation Engineering is discussed；of which the disadvantage is shown by a case study. At last，a new deformation controlling criterion for excavation based on bearing capacity of adjacent buildings is obtained with calculation by DCFEM.

Key words： foundation pit engineering bearing capacity of buildings excavation displacement control finite element method(DCFEM) deformation controlling criterion of excavation

收稿日期: 2012-06-20

引用本文:

黄茂松1，2，朱晓宇3，张陈蓉1，2. 基于周边既有建筑物承载能力的基坑变形控制标准[J]. 岩石力学与工程学报, 2012, 31(11): 2291-2304.
HUANG Maosong1，2，ZHU Xiaoyu3，ZHANG Chenrong1，2. DEFORMATION CONTROLLING CRITERION FOR EXCAVATION BASED ON BEARING CAPACITY OF ADJACENT BUILDINGS. , 2012, 31(11): 2291-2304.

链接本文:

http://www.rockmech.org/CN/Y2012/V31/I11/2291

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