袋装砂土加固地基并维护地下管道的模型试验研究  

Model Test Study on Packed Sand Foundation Reinforcement and Maintenance of Underground Pipeline

作　　者：李伟[1] 李福栋 郎雷 LI Wei;LI Fu-dong;LANG Lei(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China;School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]沈阳建筑大学土木工程学院,沈阳110168 [2]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《科学技术与工程》2018年第28期133-142,共10页Science Technology and Engineering

基　　金：国家自然科学基金(51308355);辽宁省自然科学基金(20170540735)资助

摘　　要：袋装砂土地基加固技术的应用十分广泛。为了研究袋装砂土对地基的加固作用及对地下管道的保护效果,进行了袋装砂土加固地基并维护地下管道的室内模型试验。试验对比了有加固和无加固地基、不同砂袋数量以及不同摆放形式下的结果,总结各组试验荷载与沉降以及荷载与应变的变化规律。试验结果表明:(1)拱形截面摆放形式结合地下管道共同作用能大幅提高地基承载力;(2)有效减少地基沉降和不均匀沉降的发生;(3)显著减小地下管道的变形。因此,袋装砂土地基加固法可应用于工程实践,能够提高地基的承载力,并有效维护地下管道设施。The application of the packed sand foundation reinforcement technology is very wide.In order to study the effect of packed sand on foundation reinforcement and underground pipeline protection,a series of laboratory tests on the packed sand foundation reinforcement and the maintenance of underground pipeline were conducted.The tests focused on the comparative analysis of the reinforced and unreinforced foundations,the different numbers of packed sand and the different storage forms,which summed up the changing rule of the load and settlement as well as the load and strain in each group.It is indicated from the experimental results that:①under the combination of arch storage form and underground pipeline,the bearing capacity of the foundation is greatly enhanced;②the foundation settlement and uneven settlement is decreased obviously;③the deformation of underground pipeline is reduced significantly.Therefore,the packed sand foundation reinforcement technology can be applied to engineering practice,which can effectively improve the bearing capacity of foundation and maintain the underground pipeline facilities.

关 键 词：袋装砂土 地基加固 地下管道 摆放形式 不均匀沉降 

分 类 号：TU75.3[建筑科学—建筑技术科学]