汕汾高速公路运营期软基段桥头跳车治理的探讨  

A new Idea of Treatment for Vehicle Bumping at Bridge-head at the Soft Foundation Section of Shan-fen Expressway during Service Period

作　　者：李晓燕 李奕武 

机构地区：[1]广东汕汾高速公路有限公司,广东汕头515041 [2]广东省航运规划设计院,广州510500

出　　处：《广东公路交通》2011年第4期31-34,共4页Guangdong Highway Communications

摘　　要：以汕汾高速公路为工程背景,针对工后差异沉降引起的桥头跳车问题,分析了公路运营阶段养护过程中传统路面摊铺方案的局限性,提出了以高压旋喷桩为主的复合地基方案治理桥头跳车病害的新思路,并通过试验研究对高压旋喷桩施工工艺进行了改进,分析了设计、施工中的关键问题。Taking Shan-fen expressway as the engineering background,aiming at resolving the problem of bumping at bridge-head caused by post-construction settlement,the limitation of surface paving method for expressway maintenance during service period has been analyzed.New thinking of composite foundation method based on high-pressure rotary jet grouting piles for preventing bumping disease at bridge-head has been proposed.And an improving construction technology of jet grouting piles has been realized by experimental study,the key problems of design and construction have been discussed.The new thinking will play a significant guiding role in the maintenance of Shan-fen expressway.

关 键 词：桥头跳车 高压旋喷桩 过渡段 软基处理 

分 类 号：U416.16[交通运输工程—道路与铁道工程]