空洞的存在对浅基础承载力与沉降的影响分析被引量：15

STUDY ON BEARING CAPACITY AND SETTLEMENT OF SHALLOW FOUNDATION WITH VOID

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摘要空洞的位置、形状、大小以及地基土的类型等诸因素都会对浅基础的承载力和沉降产生影响。利用一系列的二维弹塑性有限元方法分析一个空洞存在时其位置对浅基础承载力与沉降的影响,并对其发生机制进行研究。研究结果表明:空洞对浅基础承载力与沉降的影响存在一个极限范围。只有当空洞存在于这个影响极限范围之内时,空洞的存在才会显著地影响基础的承载力和沉降。另外,基于有限元量化分析结果,还提出一个简单实用的浅基础承载力的空洞影响效果计算方法。 Several factors, such as the void location and the void shape, affect the beating capacity behavior of shallow foundation. The cavity effect on the bearing capacity of strip foundation above a void is investigated analytically by using the elastoplastic 2D FEM. The relation between load and settlement of shallow foundation is analyzed for different conditions of the void： and the failure mechanism of ground is also examined. The analytical results indicate that there is a critical effect region for the void under the shallow foundation. Only when the void is located within this region, the beating capacity and settlement of strip foundation vary considerably with the void location. In addition, based on the above finite element results, a simple calculation method is proposed for the cavity effect on the bearing capacity of strip foundation.

作者彭芳乐清住真高伟大内正敏

机构地区同济大学岩土及地下工程教育部重点实验室日本白石(建设)公司技术本部

出处《岩石力学与工程学报》 EI CAS CSCD 北大核心 2007年第6期1123-1131,共9页 Chinese Journal of Rock Mechanics and Engineering

基金国家自然科学基金资助项目(50679056) 上海市曙光计划基金项目(05SG25)

关键词土力学空洞浅基础承载力数值分析 soil mechanics void shallow foundation bearing capacity numerical analysis

分类号 TU41 [建筑科学—岩土工程]

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