市政技术2026，Vol.44Issue(3)：295-307,318,14.DOI:10.19922/j.1009-7767.2026.03.295
砂质地层多管平行顶管扰动机制与控制对策研究
Research on the Disturbance Mechanism and Control Countermeasures of Multi-pipe Parallel Jacking in Sandy Strata
郭航 1马鹏 1宋战平 1赵旭涛 2陈锐1
作者信息
- 1. 西安建筑科技大学土木工程学院,陕西西安 710055||陕西省岩土与地下空间工程重点实验室,陕西西安 710055
- 2. 陕西建工集团股份有限公司,陕西西安 710003
- 折叠
摘要
Abstract
The disturbance mechanism of multi-pipe parallel jacking in sandy strata is complex and lacks of the tar-geted control measures,which has become a difficult problem in the field of jacking engineering.Therefore,based on the four-pipe parallel jacking project of the main drainage channel crossing the G310 road in Weinan City,Shaanxi Province,a combination of on-site monitoring,theoretical calculation and numerical simulation with the finite element analysis software of MIDAS GTS NX was adopted to systematically study the influence of jacking se-quence,pipe net spacing,excavation face pressure and grouting pressure on the multi-dimensional deformation of the ground surface,and verify the control effect of high-pressure rotary jet grouting reinforcement.The research re-sults show that considering the control of multi-dimensional ground surface deformation,the jacking sequence of Scheme 3 has the best settlement control effect,with the minimum ground surface settlement of-7.50 mm and a re-duction of 9.6％;Under the permitted engineering conditions,a pipe spacing greater than 1.0 times should be se-lected to reduce the disturbance effect;The optimal range of excavation face pressure is 0.2～0.5 MPa,and the grouting pressure should be controlled within 0.01～0.06 MPa.In terms of control measures for sandy soil settle-ment,the high-pressure rotary jet grouting reinforcement can reduce the maximum settlement value by 35.4％;In terms of the deviation between numerical simulation and on-site measurement,the deviation rate is ≤4％with good model reliability.The research results can provide theoretical reference for the optimization of construction parame-ters and deformation control in similar projects.关键词
平行顶管/砂质地层/数值模拟/地表沉降/注浆加固Key words
parallel pipe jacking/sandy strata/numerical simulation/ground surface settlement/grouting rein-forcement分类
建筑与水利引用本文复制引用
郭航,马鹏,宋战平,赵旭涛,陈锐..砂质地层多管平行顶管扰动机制与控制对策研究[J].市政技术,2026,44(3):295-307,318,14.
