岩土工程学报Issue(z1)：180-185,6.DOI:10.11779/CJGE2014S1031
土岩组合基坑安全风险预警标准探讨
Warning standards of safety risk for foundation pits of soil and weathered rock stratum
鲍树峰 1莫海鸿 2王友元 3杨春山 4黄海滨 1侯明勋 2陈凌伟4
作者信息
- 1. 中交四航工程研究院有限公司，广东 广州 510230
- 2. 中交交通基础工程环保与安全重点实验室，广东 广州 510230
- 3. 华南理工大学土木与交通学院，广东 广州 510641
- 4. 华南理工大学土木与交通学院，广东 广州 510641
- 折叠
摘要
Abstract
For the foundation pit consisting of soil and weathered rock stratum, at present, the warning standards of safety risk follow the existing related specifications. They lack pertinence. To more effectively guide the construction of the foundation pit consisting of soil and weathered rock stratum, the failure modes are qualitatively analyzed. Based on an related project, a typical cross section is computed using the three-dimensional finite element method and field monitoring. After synthetic analysis of the monitoring and calculated results, it is pointed out that:(1) the horizontal displacement of retaining structures is a major warning index, and the axial force of inner bracing / soil nailing / anchor bar is auxiliary; (2) the characteristic parameters of warning indexes are the maximum horizontal displacement of retaining structures, the maximum rate, the ratio of the maximum horizontal displacement to excavation depth, the ratio of axial force to earth pressure in the range of excavation depth;(3) the appropriate warning system is established, and compared with the existing related warning index, the design of the above-mentioned foundation pit is too conservative, resulting in high cost of construction, so it is necessary to optimize the design.关键词
土岩组合基坑/破坏模式/安全风险预警指标/安全风险预警标准Key words
foundation pit of soil and weathered rock stratum/failure mode/warning index/warning standard分类
建筑与水利引用本文复制引用
鲍树峰,莫海鸿,王友元,杨春山,黄海滨,侯明勋,陈凌伟..土岩组合基坑安全风险预警标准探讨[J].岩土工程学报,2014,(z1):180-185,6.
