衡重式桩板挡墙抗倾覆稳定性离心试验研究  

Study on centrifugal tests on anti-overturning stability of sheet pile wall with relieving platform

作　　者：张明 胡荣华[3] 刘国楠 王威[4] 潘效鸿[5] Zhang Ming;Hu Ronghua;Liu Guonan;Wang Wei;Pan Xiaohong(College of Civil Engineering,Henan University of Engineering,Zhengzhou 451191,China;Shenzhen Research and Design Institute of China Academy of Railway Sciences,Shenzhen 518034,China;Developer ＆ Operator of New Industry Cities,China Fortune Land Development,Beijing 100027,China;Institute of Earthquake Resistance and Disaster Reduction,Beijing University of Technology,Beijing 100124,China;The First Branch of Shenzhen Municipal Land,Resources and Housing Administrative Bureau,Shenzhen 518034,China)

机构地区：[1]河南工程学院土木工程学院,郑州451191 [2]中国铁道科学研究院深圳研究设计院,深圳518034 [3]华夏幸福基业股份有限公司产业新城,北京100027 [4]北京工业大学抗震减灾研究所,北京100124 [5]深圳市国土资源和房产管理局直属分局,深圳518034

出　　处：《建筑结构》2018年第19期97-101,共5页Building Structure

基　　金：国家自然科学基金项目(51678017);郑州市科技发展计划(153PKJGG137).

摘　　要：设计了比例尺为50的挡墙结构模型,通过不同土质（全砂土,上部砂土、下部粉土或饱和粉土）填料的三组离心模型试验,对衡重式桩板挡墙的倾覆过程进行了研究。结果表明：1）填料为全砂时,挡墙出现第2类破裂面,且出现的位置与理论计算的位置十分接近;2）当填料砂土更换为含水量为20%的粉土时,挡墙结构位移加大（并未发生倾倒破坏）,墙后出现两个局部破裂面;3）当填料土强度进一步降低后,挡墙结构发生倾覆破坏,卸荷板范围内（包括板上方与板下方）的土体与挡墙一起发生倾覆,卸荷板的存在增强了结构的抗倾覆稳定性;4）由试验结果提出的挡墙倾覆破坏模式与数值模拟结果一致。A retaining wall model with a scale of 1∶50 was designed. Three groups of centrifugal model tests of different soils including full sand, the upper sand and the lower silt soil or saturated silt soil were conducted and the overturning process of the sheet pile wall with relieving platform was studied. The results show that： 1） when soil fillers is full sand, the second type of failure surface appears on the retaining wall, and the position of which is close to the position of theoretical calculation; 2） When the soil filler（sand） is changed into silt soil with 20% water content, the displacement of the retaining wall increases（no overturning failure）, and two local failure surfaces appear behind the retaining wall; 3） When the strength of soil filler has a further decrease, an overturning failure of the retaining wall occurs. The soil layer within a range of the relieving platform（including its above and below）overturns with the retaining wall. The existence of the relieving platform enhances the anti-overturning stability of the structure; 4） The overturning failure mode of the sheet pile wall with relieving platform proposed by the test results is consistent with the numerical simulation results.

关 键 词：公路边(滑)坡 衡重式桩板挡墙 离心试验 抗倾覆稳定性 

分 类 号：TU413[建筑科学—岩土工程]