刚性基础下柔性桩加筋复合地基室内模型试验研究  

Laboratory model test study on flexible pile reinforced composite foundation under rigid foundation

作　　者：王晶仁[1,2] 葛忻声 袁慧[1] 王凯[1] 张宇龙[3] WANG Jing-ren;GE Xin-sheng;YUAN Hui;WANG Kai;ZHANG Yu-long(Taiyuan University of Technology,Shanxi Taiyuan 030024,China;Taiyuan Longcheng Development Investment Co.,Ltd.,Taiyuan 030002,China;Shanxi Construction Engineering Co.,Ltd.,Taiyuan 030002,China)

机构地区：[1]太原理工大学,山西太原030024 [2]太原市龙城发展投资有限公司,山西太原030002 [3]山西建筑工程总公司,山西太原030000

出　　处：《广西大学学报（自然科学版）》2019年第1期108-114,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51578359)

摘　　要：为了研究刚性基础下柔性桩加筋复合地基在静力荷载下的受力性能,本文采用自行研制的室内模型试验设备,考虑是否加筋、不同桩径、格栅上预应力等影响因素,对刚性基础下柔性桩加筋复合地基开展室内模型试验研究。试验结果表明:垫层中格栅下土压力大于格栅上土压力,随着荷载增大而增大,桩径较大的复合地基中垫层格栅下土压力与上土压力之比较大;土工格栅上预应力增大,土工格栅下土压力与格栅上土压力之比减小;与未加筋的柔性桩复合地基相比,柔性桩加筋复合地基垫层中格栅下土压力与格栅上土压力之比较小,应力扩散效果更好。In order to further study the mechanical behavior of flexible pile composite foundation under rigid foundation,the laboratory model test equipment developed by the authors was used to study the flexible pile reinforced composite foundation under rigid foundation,considering the factors such as reinforcement,different pile diameter,and the prestress on the geogrid.The test results show that the soil pressure of the geogrid in the cushion was larger than the soil pressure on the geogrid,and increases with the load,and the soil pressure under the geogrid in the composite foundation with larger diameter was larger than that of the upper soil pressure.With the increase of prestress on geogrid,the ratio of soil pressure under geogrid to soil pressure on geogrid decreases.Compared with the non reinforced flexible pile composite foundation,the soil pressure under the geogrid of the flexible pile reinforced composite foundation was smaller than that on the geogrid,and the growth of stress was slower.

关 键 词：双向土工格栅 柔性桩 加筋垫层 复合地基 模型试验 

分 类 号：TU470[建筑科学—结构工程]