岩溶区桩基破坏模式研究及稳定性分析

孙映霞; 张智浩; 王金安

doi:10.13204/j.gyjz201209021

岩溶区桩基破坏模式研究及稳定性分析

doi: 10.13204/j.gyjz201209021

1.
1. 中冶建筑研究总院有限公司,北京 100088;
2.
2. 中国京冶工程技术有限公司,北京 100088;
3.
3. 北京科技大学,北京 100083

基金项目:

岩溶地区桩基工程技术综合研究(财企【2008】221号)

详细信息

作者简介:
孙映霞，女，1985年出生，工程师.E-mail:syx111_1985@163.com

计量
- 文章访问数: 155
- HTML全文浏览量: 9
- PDF下载量: 61
- 被引次数: 0
出版历程
- 收稿日期: 2011-10-21
- 刊出日期: 2012-09-20

FAILURE PATTERN STUDY AND STABILITY ANALYSIS OF PILE FOUNDATION IN KARST AREA

1.
1. Central Research Institute of Building and Construction,MCC,Beijing 100088,China;
2.
2. China Jingye Engineering Corporation Limited,Beijing 100088,China;
3.
3. Beijing University of Science and Technology,Beijing 100083,China

摘要

摘要: 在室内模型试验的基础上,采用有限差分法对桩基荷载作用下岩溶地基的稳定性进行数值模拟分析,得出溶洞周围岩体在桩基荷载作用下内部应力、应变的变化过程及破坏面的形状和位置等,提出判断岩溶区桩基稳定性的有效判据。归纳总结岩溶区桩基及其下伏溶洞的破坏机理和破坏模式,主要包括桩基破坏和溶洞围岩破坏。破坏模式主要受溶洞大小、荷载作用位置以及溶洞顶板厚度等因素影响,其中溶洞顶板厚度为主要影响因素。
- 溶洞区 /
- 桩基 /
- 数值模拟 /
- 稳定分析 /
- 破坏模式
Abstract: Based on the indoor model test, the stability analysis of the rock mass in karst area affected by pile was carried out by numerical simulation with the finite difference method.From the calculation results, it was obtained the changing procedure of the stress and the internal strain of the rock mass around the karst cave under pile load and the failure surface position, and put forward the effective stability criterion of the pile in karst area.It was also summarized the failure mode and failure mechanism of piles foundation in karst area, including pile foundation damage and the surrounding rock mass failure of the cave.The failure mode was mainly affected by the size of the karst cave, the load location, the roof thickness, and etc, in which the roof thickness was the main influence factors
- karst areas /
- pile foundation /
- numerical simulation /
- stability analysis /
- failure patterns