相似理论在溶洞顶板稳定性数值分析中的应用  

Application of Similarity Theory to Numerical Analysis on Roof Stability of Karst Cave

作　　者：车平[1] 黄宏伟[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《地下空间与工程学报》2007年第4期617-622,共6页Chinese Journal of Underground Space and Engineering

基　　金：交通部西部交通建设科技项目资助课题(200231800018)

摘　　要：溶洞顶板稳定与否是多方面因素综合影响的结果。将相似理论应用于溶洞顶板稳定性的数值计算中,通过正交分析得到了各影响因素与临界安全厚跨比的相互关系。通过对大量数值模型计算结果的多因素回归分析,得出了临界安全厚跨比的计算方程,该方程既考虑了基础与洞室的几何因素,同时也考虑了岩体的力学因素。经工程实例检验,所得计算方程具有一定的适用性与可靠性。通过以上研究表明,相似理论可有效应用于岩土工程数值计算中。Roof stability is influenced by the multi - factor. In this paper, the similarity theory was applied to the numerical analysis, through orthogonal test, the relation among the factors influencing the roof stability of karst cave has been studied. Through the analysis on the results of numerical simulation, a calculation formula of estimating the safe thickness of the roof was obtained. In the calculation formula the diversified factors relating to the roof stability have been considered. Finally, the applicability and reliability of the calculation formula is verified by the engineering examples. Above research result indicates that the similarity theory can be effectively applied to the numerical analysis of geotechnical engineering.

关 键 词：溶洞 顶板稳定性 数值模拟 相似理论 

分 类 号：TU473.1[建筑科学—结构工程]