不同开挖方式地下硐室压力拱的演变机理研究  

Research on the Evolution Mechanism of Pressure Arch of Underground Cavern Excavated in Different Ways

作　　者：王云飞[1] 李长洪[1] 郑晓娟[2] 夏树威 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]焦作师范高等专科学校政法系,河南焦作市454000 [3]河南省建筑科学研究有限公司八所,河南郑州450053

出　　处：《矿业研究与开发》2009年第3期12-14,20,共4页Mining Research and Development

基　　金：国家自然科学基金资助项目(50074002)

摘　　要：对不同开挖方式地下工程压力拱的发展演变过程进行了分析。分析结果表明,随着开挖的进行,地下工程拱顶部压力拱内边距变化不大而压力拱的厚度在增加;地下硐室两帮、底板中部压力拱内边距较大;核心土对硐室拱脚处压力拱的内边距有较大影响;分步开挖可使压力拱内边距减小而对压力拱厚度影响较小,即可使压力拱向硐室边沿移近。The evolution of pressure arch of underground engineering excavated in different ways was analyzed. The results of analysis showed that with progress of excavation the space between two the inner borders of pressure arch on the top of underground engineering changed little, but the thickness of the pressure arch was increasing; tbe space between two the inner borders of pressure arch was larger in the middle of the floor and the two sides of underground cavern engineering than other part ;core -soil had a greater effect on the space between two the inner borders of pressure arch on the base of underground cavern engineering;step- by- step excavation could make the space between two the inner borders of pressure arch reduce, but had a little impact on the thickness of pressure arch, that is, could make the pressure arch closer to the edge of underground cavern engineering.

关 键 词：地下工程 硐室开挖 压力拱 数值模拟 

分 类 号：TU456[建筑科学—岩土工程]