微风化泥质粉砂岩地基承载性状现场试验及数值仿真  

Field test and numerical simulation of bearing properties of slightly weathered argillaceous silt sandstone foundation

作　　者：桑松魁 白晓宇[1,2] 张明义[1,2] 牟洋洋 Sang Songkui1;Bai Xiaoyu1,2;Zhang Mingyi1,2;Mu Yangyang1(1. School of Civil Engineering, Qingdao University of Technology, Qingdao 266033 ; 2. Collaborative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao University of Technology, Qingdao.)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]青岛理工大学蓝色经济区工程建设与安全协同创新中心,山东青岛266033

出　　处：《工程建设》2018年第4期1-5,10,共6页Engineering Construction

基　　金：国家自然科学基金项目(51708316;51778312);山东省重点研发计划项目(2017GSF16107);山东省自然科学基金项目(ZR2016EEQ08);山东省高等学校科技计划项目(J16LG02);青岛市应用基础研究计划项目(16-5-1-39-jch)

摘　　要：以烟台莱阳某工程依托,对该工程的泥质粉砂岩进行了静载荷试验与FLAC^(3D)有限元分析。试验结果表明:其中1条p-s曲线有明显的比例极限,可依此作为泥质粉砂岩的承载力极限。而其它2条p-s曲线属于缓变型,均没有明显的比例极限,应取最大加荷值作为地基承载力极限值。p-s曲线图中可看出试验点的最终沉降量较小,反映了岩质较致密、压缩性小、承载力较为稳定,从而说明泥质粉砂岩是很好的持力层。通过FLAC^(3D)进行数值模拟所得结果与实测结果非常接近,从而表明采用FLAC^(3D)进行模拟泥质粉砂岩时是可行的。Based on a project of Laiyang,Yantai,the static load test and a FLAC^（3D） finite element analysis of the muddy siltstone for the project were carried out. The experimental results show that,one of the p-s curves has a significant ratio limit,which can be used as the limit of the bearing capacity of argillaceous siltstone,while the other two p-s curves are graded,and there are no obvious proportional limits,the maximum loading value should be taken as the limit value of the bearing capacity of the foundation. It can be seen from the p-s curve that the final settlement of the test point is small,reflecting that the rock is relatively compact,the compressibility is small,and the bearing capacity is relatively stable and indicating that the muddy siltstone is a good holding layer. The result of numerical simulation by FLAC^（3D） is very close to the measured results,which shows that it is feasible to simulate the muddy siltstone with FLAC^（3D） .

关 键 词：泥质粉砂岩 静载荷试验 地基承载力 FLAC3D 数值模拟 

分 类 号：TU470[建筑科学—结构工程]