期刊论文

Stability Analysis and Evaluation of Cave Foundation under the Role of Groundwater in Karst Area

中文

山地学报

Journal of Mountain Research

1008-2786

2008

26

4

453-458

10.3969/j.issn.1008-2786.2008.04.012

山西省自然科学基金(2006011077);山西省留学基金(20060024)

本校为其他机构

岩溶区路桥基础稳定性分析与评价是目前国内外高速公路建设的重大技术难题之一.目前,对溶洞地基稳定性评价研究多集中在塌陷发育机理及预防等定性评价方面,少见定量评价.在弹塑性力学基本理论基础上,首先分析地基中溶洞洞壁周围土体的应力状态,判别应力集中影响范围,再利用莫尔一库仑强度准则对溶洞地基稳定性计算模型进行改进,最后,以沪蓉国道主干线K198+189.85花石板1#大桥桥基稳定性评价为例,验证了该改进模型的可行性和可靠性.并进一步研究了基础底面尺寸、埋深、溶洞洞体形状以及地下水位埋深对溶洞稳定性的影响,揭示了该类溶洞塌陷破坏的机理.研究表明,改进模型是可行的,基础底面尺寸越小...

It is one of the important technique problems of expressway construction to analyze and evaluate the stability of roadbed and bridge fundations in karst region at home and abroad.Currently,the stability evaluation of cave foundation is mostly focus on the quantitative evaluation,such as the collapse mechanism and prevention,while the qualitative assessment is rare.Based on the plastoelasticity theory,firstly analyze the stress state of the cave wall-surrounding body in the foundation,distinguish the stress concentration influence area,then improve the cave foundation stability computation mode...