土工离心机路堤地基弯沉式差异沉降控制装置研制与试验  

Development and test of control device with geltechnical centrifugal for deflection type differential settlement of embankment foundation

作　　者：陈虎[1] 罗强[1] 孟伟超[1] 

机构地区：[1]西南交通大学高速铁路线路工程教育部重点实验室,四川成都610031

出　　处：《实验技术与管理》2013年第12期96-100,共5页Experimental Technology and Management

基　　金：铁道部科技研究开发计划项目(2008G031-4);国家973计划课题(2013CB036204)

摘　　要：为研究路堤地基弯沉式差异沉降在路堤中的传递扩散规律及对路基面不均匀变形的影响机制,在土工离心机模型箱内研制了一套可以在离心机运转条件下实现地基差异沉降的实时精确控制装置。该装置主要包括位移控制系统、支撑墩及差异沉降控制板。该装置使用方便,沉降位移控制精度高,多次控制沉降板沉降可实现地基差异沉降逐渐发展的全过程模拟。弯沉式差异沉降对路基面不均匀变形的影响,主要受其沿线路纵向分布长度和路堤高度的比值影响,随比值的增大路基面不均匀变形折角与差异沉降幅值基本成线性关系。With local depression, the embankment foundation is easy to produce deflection type differential settlement. A control device in geotecbnical centrifuge model box which can achieve the deflection type differential settlement of embankment foundation under centrifugal loading conditions is developed to investigate the transfer and diffusion low for deflection type differential settlement of embankment foundation and also the influence mechanism on the uneven deformation of subgrade surface. The device consists of settlement control device, support device and differential settlement control boards. The device is easy to use with high precision. The whole process simulation of the foundation differential settlement can be achieved by repeatedly controlling the settlement plate deformation. The influence on uneven deformation of subgrade surface is mainly caused by the ratio of deflection type differential settlement distribution length along the route and embankment height, with the increase of the ratio the uneven deformation slope of subgrade surface has linear relationship with amplitude of embankment foundation differential settlement.

关 键 词：土工离心机 地基差异沉降 路基面不均匀变形 控制装置 

分 类 号：TU411-33[建筑科学—岩土工程]