采动区墙体转动模式下非极限被动土压力试验研究  

Experimental Study on the Non-limit State Passive Earth Pressure under RB Mode Within Mining Subsidence Areas

作　　者：谢晓鹏[1] 窦国涛 曹正浩 于文杰 XIE Xiao-peng;DOU Guo-tao;CAO Zheng-hao;YU Wen-jie(School of Civil Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100011,China)

机构地区：[1]郑州航空工业管理学院土木建筑工程学院,郑州450046 [2]中科院地质与地球物理研究所,北京100011

出　　处：《科学技术与工程》2018年第25期216-223,共8页Science Technology and Engineering

基　　金：河南省科技攻关项目(182102310721);江苏省土木工程环境灾变与结构可靠性重点实验室开放基金项目(JSKL2018YB04);国家青年科学基金(51708514)资助

摘　　要：为了揭示采动区下沉盆地压缩区刚性墙体非极限被动土压力的分布规律,根据采动区下沉盆地压缩区挡墙主要发生挡墙绕墙底转动变位模式(RB模式)的特点,进行了挡墙绕墙底转动变位模式下,填土为松砂和密砂时非极限被动土压力试验,同时对比了填土为松砂和密砂挡墙平移模式时非极限被动土压力试验。研究结果表明:(1)采动区下沉盆地压缩区挡墙绕墙底转动压缩土体,侧土压力和墙体深度和位移都有关系,侧土压力、深度和位移三维曲面波动较大;(2)侧土压力随深度呈非线性分布,墙体中上部土压力较大;(3)侧土压力随挡墙位移也呈非线性分布,随着位移的增大,非极限侧土压力合力随之增大。In order to study the distribution of the lateral earth pressure under non-limited state against the wall in compression zone of mining subsidence area,Based on the characteristic that the rigid wall was turned around the bottom of the wall in compression zone,the tests of loose sand and dense sand under RB mode was carried,while the tests of loose sand and dense sand under T mode was carried too.The result shows these as follows.①under RB mode,the lateral earth pressure of wall is correlated with the depth and displacement of the wall,the 3d surface fluctuation is large;②the distribution of lateral earth pressure of wall nolinear with the depth and displacement of the wall,③the lateral earth pressure reach the maximum in the middle of the wall,the resultant of passive earth pressure increased with the displacement of the wall.

关 键 词：采动区 下沉盆地 压缩区 非极限侧土压力 

分 类 号：TD228[矿业工程—矿井建设]