软岩允许变形合理值现场估算  

Engineering evaluation of allowable deformation of soft rock

作　　者：吴德义[1] 程桦[1] 

机构地区：[1]安徽建筑工业学院

出　　处：《岩土工程学报》2008年第7期1029-1032,共4页Chinese Journal of Geotechnical Engineering

基　　金：安徽省科技攻关计划重大科技专项资助项目(08010302061);安徽省自然科学基金资助项目(070414173)

摘　　要：现场实测了巷道围岩两帮及顶底相对变形随时间的变化,分析了围岩变形不同阶段巷道围岩表面变形随时间的变化规律,结合支架受荷测量确定了一种软岩允许变形合理取值的简单可行现场确定方法,为充分发挥软岩自撑能力和合理确定U型棚支架支护参数提供了依据。Based on the engineering tests on relative deformation of the lateral tunnel rock and the top and bottom tunnel rock, the variation of tunnel rock deformation with time during different periods was analyzed, and the attenuating coefficients of the first creep deformation and the secondary creep deformation were obtained. The tunnel rock stability was deduced through measuring shelf support force. Combined with the attenuating coefficient of the first creep deformation and the secondary creep deformation and the shelf support force,＇a method of engineering evaluation of allowable deformation of soft rock was deduced, and it could be used to optimize the support parameters.

关 键 词：围岩表面变形 速度衰减系数 支架受荷 软岩变形合理值 

分 类 号：TU452[建筑科学—岩土工程]