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DOI: https://doi.org/10.11988/ckyyb.20250028

高压旋喷桩施工对周围地基和既有线影响研究

  • 赵文辉 ,
  • 刘星 ,
  • 张珂 ,
  • 李梓敖 ,
  • 刘家宇
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  • 兰州交通大学 土木工程学院，兰州 730070

赵文辉（1989-），男，河南商丘人，副教授，博士，主要从事路基工程等领域的研究工作。E-mail：

收稿日期: 2025-01-10

  修回日期: 2025-05-19

  网络出版日期: 2025-08-01

基金资助

国家自然科学基金(52368065)

长沙市自然科学基金(kq2402025)

兰州交通大学重点研发项目资助(LZJTU-ZDYF2305)

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Study on the Influence of High Pressure Jet Grouting Pile Construction on Surrounding Foundation and Existing Line

  • ZHAO Wen-hui ,
  • LIU Xing ,
  • ZHANG Ke ,
  • LI Zi-ao ,
  • LIU Jia-yu
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  • School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070,China

Received date: 2025-01-10

  Revised date: 2025-05-19

  Online published: 2025-08-01

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摘要

高压旋喷桩在处理黄土地区帮宽段地基时会产生挤土效应，为满足线路几何形位控制的严格性，需明确高压旋喷桩施工对既有线路的影响。基于某黄土地区实际工程的监测数据，结合圆柱孔扩张理论，研究高压旋喷桩单桩及群桩施工下土体侧向位移变化，分析高压旋喷桩施工阶段既有线沉降变化规律，探究高压旋喷桩施工对既有线服役状态的影响。结果表明：高压旋喷桩施工引起的土体侧向位移沿桩深方向整体呈减小趋势且与周围土体距桩心距离呈负相关；在0~4d0范围内，土体侧向位移随归一化径向距离增加呈明显减小趋势，而后逐渐变化缓慢；高压旋喷桩施工影响范围约为11倍成桩半径；隆起量随群桩施工呈现“双峰”型分布，且影响幅值与施工距既有路基的距离成反比。采用跳桩法施工可减弱对既有线的影响，本研究可为类似工程提供思路及建议。

关键词： 黄土地区; 高压旋喷桩; 侧向位移; 竖向变形; 服役状态

本文引用格式

赵文辉 , 刘星 , 张珂 , 李梓敖 , 刘家宇 . 高压旋喷桩施工对周围地基和既有线影响研究[J]. 长江科学院院报, 0 . DOI: 10.11988/ckyyb.20250028

Abstract

The high pressure jet grouting pile will produce soil squeezing effect when dealing with the foundation of the wide section of the loess area. In order to meet the strict control of the geometric shape and position of the line, it is necessary to clarify the influence of the construction of the high pressure jet grouting pile on the existing line. Based on the monitoring data of the practical project in the loess area, combined with the theory of cylindrical hole expansion, the lateral displacement of soil under the construction of single pile and group piles of high-pressure jet grouting pile was studied, the settlement variation law of the existing line during the construction stage of high-pressure jet grouting pile was analyzed, and the influence of the construction of high pressure jet grouting pile on the service state of the existing line was explored. The results show that the lateral displacement of the soil caused by the construction of the high-pressure jet grouting pile along the direction of the pile depth as a whole is a decreasing trend and is negatively correlated with the distance from the surrounding soil to the pile center. In the range of 0 ~ 4d0, the lateral displacement of soil decreases obviously with the increase of normalized radial distance, and then gradually changes slowly. The area of influence of the high pressure jet grouting pile construction is approximately 11 times the radius of the pile formation. The construction of high pressure jet grouting piles will cause the uplift of existing lines. The uplift amount shows a bimodal distribution with the construction of pile groups, and the magnitude of the impact is inversely proportional to the construction distance from the existing subgrade. Pile jumping construction method can reduce the influence on the existing line. This study can provide ideas and suggestions for similar engineering project.

Key words： loess area; high pressure jet grouting pile; lateral displacement; vertical deformation; service condition

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