谭鑫;任亚坤;周苏华;黄明华;刘晓明;姚君;

• 1:湖南大学土木工程学院
• 2:建筑安全与节能教育部重点实验室(湖南大学)
• 3:长沙市公共工程建设中心

摘要(Abstract)：

基于某基坑工程现场实测数据和数值模拟方法，对近邻既有浅基础建筑物的深基坑变形特征进行了研究。建立了结构-基础-地基共同作用的数值模型，采用考虑土体加卸载路径的土体塑性硬化本构关系，能够较好地反映基坑开挖诱发的地层变形。通过基坑现场实测数据及既有经验曲线验证了所建立数值模型的正确性，在此基础上分析了既有建筑对基坑变形特征的影响。结果表明，基坑开挖主要影响区域内的地表差异沉降导致浅基础建筑物出现转动倾斜，引起建筑基础下地基附加应力重分布，进而加剧了差异沉降。对于基坑诱发变形的预测计算有必要考虑建筑物与地基的共同作用。忽视共同作用影响则有可能低估基坑开挖引起的建筑物差异沉降而造成潜在安全风险。

关键词(KeyWords)： 安全工程;基坑;变形特征;浅基础;差异沉降;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 湖南创新型省份建设专项经费项目(2019GK1010)

作者(Authors): 谭鑫;任亚坤;周苏华;黄明华;刘晓明;姚君;

DOI: 10.13637/j.issn.1009-6094.2020.1479

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