软土地区小型构造物路段纵向差异沉降控制技术研究  

Study on Technique Controling Longitudinal Differential Settlement in Small Structure Section in Soft Soil Area

作　　者：刘军[1] 张强[1] 

机构地区：[1]江苏省交通科学研究院股份有限公司,南京211112

出　　处：《路基工程》2013年第5期113-116,共4页Subgrade Engineering

摘　　要：针对204国道盐城南段涵洞基底软基处理与相邻路基存在的差异沉降问题,提出纵向差异沉降控制技术,并以离心模拟试验和数值分析为研究手段,模拟了天然地基和水泥搅拌桩地基处理两种模型的沉降。研究结果表明:采用水泥搅拌桩处理涵洞基底软土的沉降量反而大于天然地基,因而建议以浅层换填处理为主,尽量避免深层处理。In relation to the issues arose differential settlement from soft foundation culvert at the south Yancheng Section of National Road 204 next to adjoining subgrad treatment for the bottom of e, the technique controling longitudinal differential settlement was developed and, by means of centrifugal simulation test and numerical analysis, the settlement in natural foundation and the foundation treated by cement mixing piles was simulated. The study result shows that the settlement in the soft foundation at the bottom of culvert treated by cement mixing piles is larger than that in natural foundation; therefore, it is suggested that in the shallow layer, exchanging- fill is preferable and treatment in the deep layer should be avoided with every reasonable effort.

关 键 词：软土地区 小型构造物路段 纵向差异沉降 离心模拟模型 数值分析 换填处理 

分 类 号：TU433[建筑科学—岩土工程]