注浆水平纠偏的作用规律与影响因素研究
DOI:
作者:
作者单位:

天津大学

作者简介:

通讯作者:

中图分类号:

基金项目:

天津市自然科学基金(18JCQNJC07900);国家自然科学基金重点项目(41630641)


Study on the effect and influencing factors of the grouting on the horizontal deformation control
Author:
Affiliation:

Tianjin University

Fund Project:

Natural Science Foundation of Tianjin (No. 18JCQNJC07900); Key Program of the National Natural Science Foundation of China (No. 41630641)

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    注浆法作为补偿地层沉降的手段已取得广泛应用,目前的研究方向主要集中于注浆原理以及工程沉降纠偏等方面,对于土体参数、注浆参数对隧道水平位移控制效果的影响缺少系统研究。因此,本文基于天津某工程一现场注浆试验,采用应变法模拟注浆过程,研究了土质条件、注浆量、注浆距离、注浆长度以及注浆深度对注浆水平纠偏效果的影响。结果表明,注浆引起的土体最大水平位移位于注浆体顶部附近;土体强度、刚度参数对注浆效果影响不大,说明注浆控制水平位移的适用性较广泛;距离注浆点较近的土体水平位移随注浆量增加增长较快,较远时增长较慢,且土体水平位移随注浆距离增加衰减迅速,因此应尽量缩短注浆点与纠偏对象的距离;注浆长度较小时注浆作用范围集中且土体最大位移值较大,反之注浆作用较为分散均匀,应根据注浆距离和纠偏对象在深度上的范围选择注浆长度,最大化发挥注浆纠偏效果。

    Abstract:

    Grouting method has been widely used as a measure to compensate the ground settlement. Current research mainly focuses on the principle of grouting and the recovery of the settlement. However, the influence of soil parameters and injection parameters on the horizontal displacement of tunnel has not been systematically studied. Therefore, based on a field grouting test of a project in Tianjin, this paper used strain method to simulate the grouting process, and studied the influence of soil conditions, grouting amount, grouting distance, grouting length and grouting depth range on the horizontal deformation of soil. The results show that the maximum horizontal displacement of soil caused by grouting is located near the top of the grouted zone. Soil strength and stiffness have little influence on grouting effect, which indicates that the applicability of grouting to control horizontal displacement is wide. The horizontal displacement of soil near the grouting point increases rapidly with the increase of grouting amount and slowly when it is far from the grouting point, and the horizontal displacement of soil decreases rapidly with the increase of grouting distance. Therefore, the distance between the grouting point and the correcting object should be shortened. When the grouting length is small, the influence range of grouting is concentrated and the maximum displacement of soil is large. On the contrary, the influence of grouting is relatively dispersed and uniform. The grouting length should be selected according to the distance of grouting and the range of depth of correcting object to maximize the effect of grouting correction.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2020-09-27
  • 最后修改日期:2021-02-23
  • 录用日期:2021-02-26
  • 在线发布日期:
  • 出版日期: