摘要
结合土工离心模型试验、理论分析及实地调查．综合研究了土拱效应的形成机理及存在条件；分析了土中成洪洞室的稳定性；推导出土中洞室的上覆土厚度及相应的最大跨径公式。计算所得的结果与试验成果相一致。
Based on the centrifugal model test.Site investigation.and analytical analysis,the mechanism of soil arching action and its working conditions are studied.The stability of arching cave is analysised.and the relations of embedded soil depth and the ultimate arch span are presented.The results of calculation are in agreement with those of tests.
关键词
土拱
形成机理
压力拱
土工试验
soil arching,mechanism,arch span.embedment depth
