吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (4): 1082-1093.doi: 10.13229/j.cnki.jdxbgxb201704011

• 论文 • 上一篇    下一篇

钢塑复合筋带挡土墙病害及成因

于天来1, 郑彬双1, 李海生1, 唐泽睿1, 赵云鹏1, 2   

  1. 1.东北林业大学 土木工程学院,哈尔滨 150040;
    2.辽宁省交通规划设计院,沈阳 110166
  • 收稿日期:2016-03-01 出版日期:2017-07-20 发布日期:2017-07-20
  • 作者简介:于天来(1965-),男,教授,博士生导师.研究方向:桥梁结构设计理论及桥梁结构防灾减灾.E-mail:tianlaiyu@126.com
  • 基金资助:

    国家自然科学基金项目(51408258); 中国博士后科学基金项目(2014M560237,2015T80305); 中央高校基本科研业务费专项资金项目(JCKY-QKJC06).

Analyses of defects and causes of steel-plastic compound reinforced retaining wall

YU Tian-lai1, ZHENG Bin-shuang1, LI Hai-sheng1, TANG Ze-rui1, ZHAO Yun-peng1, 2   

  1. 1.School of Civil Engineering,Northeast Forestry University, Harbin 150040, China;
    2.Traffic Planning and Design Institute of Liaoning Province,Shenyang 110166,China
  • Received:2016-03-01 Online:2017-07-20 Published:2017-07-20

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摘要：

针对加筋土挡墙在使用过程中会出现竖向沉降、路面纵横开裂及挡墙外倾变形等病害,甚至发生局部塌陷,从而影响交通运营的问题。通过对哈尔滨市加筋土挡墙的病害调查,总结了病害的主要形态。选取典型病害段,利用MIDAS-GTS NX有限元软件,分析了填土性质、填土脱空、筋带断裂、渗水及汽车荷载等因素对运营后挡墙水平变位及筋带轴力的影响,系统地研究了加筋土挡墙病害的成因。研究认为:挡墙的病害是土压力、车辆作用、路面渗水等诸多因素综合作用的结果。填土的c、φ值是挡墙水平变位的敏感性因素,路面开裂渗水,使得填土含水量上升,导致填土的c、φ值下降,这是导致挡墙水平外倾的重要因素;筋带断裂、填土脱空及汽车荷载超载也是导致挡墙水平变形重要因素之一,本文研究成果为加筋土挡墙的养护维修与加固提供了依据。

关键词: 道路工程, 加筋土挡墙, 病害, 填土性质, 成因分析

Abstract:

Reinforced retaining wall has been widely used in highway construction, however, the vertical settlement, cross cracks of the pavement and outward-dipping deformation and other defects have occurred. These defects can even lead to partial collapse that impacts the traffic. Based on the defect survey of the reinforced retaining wall in Harbin City, the main forms of the defects are summarized. A section of road with typical defects is selected as an example to investigate the influences of fill properties, fill voids, ribbon fracture, seepage, traffic load and other factors on the horizontal deflection and the axial force using finite element software MIDAS-GTS NX. The causes of the defects of the reinforces retaining wall are systematically analyzed. Results show that the defects of the retaining wall are caused by the integrated actions of soil pressure, traffic load, pavement seepage and many other factors. The values of C and φ of the fill are the sensitive factors of the horizontal displacement of retaining wall. The pavement crack and seepage lead to the moisture increase, resulting in the decreases in C and φ, which is the factor of the outward-dipping deformation. Ribbon fracture, fill void and traffic load are important factors that lead to horizontal deformation of the retaining wall. This study may provide reference for the maintenance and strengthening of reinforced retaining walls.

Key words: road engineering, reinforced retaining wall, diseases, soil property, causes analysis

中图分类号: 

  • U441
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