土工基础

›› 2015, Vol. 29 ›› Issue (5): 30-34.

• 工程实录 • 上一篇    下一篇

桩板墙支挡结构半填半挖路基不均匀沉降影响因素及其控制标准

谷柏森，王家强   

  1. （苏交科集团股份有限公司，南京 210017）
  • 收稿日期:2014-10-31 出版日期:2015-10-20 发布日期:2015-11-06
  • 作者简介:谷柏森（1978-），男，工程师，研究方向为隧道与地下工程的设计与理论研究。

Factors Causing Differential Settlements and the Mitigation Measures in the Transition Zone of Cut and Fill Area of a Sheet Pile Supported Embankment

GU Bosen, WANG Jiaqiang   

  1. (Jiangsu Transportation  Institute Group., Ltd., Nanjing 210017)
  • Received:2014-10-31 Online:2015-10-20 Published:2015-11-06

摘要： 半填半挖路基由于挖方和填方岩(土)物理、力学性质、固结时间不同，密实度存在差异，工后往往会出现明显的不均匀沉降现象。桩板墙支挡结构半填半挖路基不均匀沉降变形主要由地基在填方荷载作用下发生的固结变形、路基填方在自身荷载作用下发生的压缩变形以及公路路基在行车荷载作用下发生的累计塑性变形等三个部分组成。当半填半挖路基间的不均匀沉降达到一定数值时，就会导致路面内的拉应力超过路面的极限抗拉强度，最终导致路面产生龟裂和破坏，影响公路的正常营运。结合绵茂公路桩板墙支挡结构半填半挖路基工程，分析了〖JP+3〗桩板墙支挡结构半填半挖路基不均匀沉降的影响因素，提出了桩板墙支挡结构半填半挖路基不均匀沉降控制标准。

关键词: 半填半挖路基, 不均匀沉降, 影响因素, 控制标准

Abstract:
〖WT5”HZ〗Abstract\ 〖WTBZ〗The differential settlement after the construction is usually observed in the transition zone between the fill and cut area in a sheet pile supported embankment due to the differences in the physical and mechanical properties, consolidation time as well as density among the cut and fill areas. The different settlement in a sheet pile supported embankment is consisted of settlement in the consolidation settlement in the fill area, compression deformation under the self-weight and the plastic deformation under the vehicle loading. The tension cracks and failure will occur in the pavement when the large differential settlement is induced and the tension limits of the pavement is exceeded. The normal operation of the roadway will be adversely affected. The factors that affecting the differential settlement in the sheet pile supported embankment in the Mianhe Highway are presented in this paper.

Key words: Embankment with Fill and Cut Transition, Differential Settlements, Affecting Factors, Mitigation Measures