PDF全文阅读

李   琳1 ,  张文涛2 ,  冯明月3

 

( 1 .  石家庄铁道大学 土木工程学院 ，石家庄 050043 ;  2.  中铁二十四局集团有限公司 ，上海 200433 ;

3 .  河北省交通规划设计院有限公司 ，石家庄 050200)

摘   要 ：为了探究大断面长距离矩形顶管施工中注浆压力 、摩阻力 、开挖面顶推力和步长对地表沉降的影响规律 ，并对施工参数优化。以济南轨道交通 4 号线段店站矩形顶管通道工程为依托 ，采用正交试验法设计数值模拟方案 ，利用 FLAC 3D 有限差分软件进行模拟分析。结果表明：顶管施工过程中地表监测数据与模拟结果基本吻合 ；步长是最敏感因素 ，开挖面顶推力为重要因素 ，注浆压力次之 ，摩阻力影响最小 ；步长与地表沉降呈正相关 ，开挖面顶推力 、注浆压力与其呈负相关 ，摩阻力在 25 kPa 前呈负相关 ，25 kPa 后呈正相关 ；最佳施工参数：步长 1 . 5 m ,  开挖面顶推力 200 kPa ,  注浆压力 230 kPa 以及摩阻力 25 kPa。研究结果可为济南地区矩形顶管法开挖地铁出入口通道提供参考。

关键词：大断面 ；长距离 ；矩形顶管 ；正交试验法 ；地表沉降

中图分类号：U455           

文献标志码：A          

 文章编号： 1005- 8249   (2025)  04- 0111- 06

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .04.021

 

LI Lin1  ,  ZHANG Wentao2 ,  FENG Mingyue3

( 1 . School of Civil Engineering , Shijiazhuang Tiedao University , Shijiazhuang 050043 , China;

2. China Railway 24th Bureau Group Corporation Limited ,  Shanghai 200433 , China;  3 . Hebei Provincial

Communications Planning , Design and Research Institute Co . , Ltd. , Shijiazhuang 050200 , China)

Abstract :  In order to explore the influence laws of grouting pressure , frictional resistance , thrust force  at the  excavation face and step length on ground surface settlement during the construction of large - section and long - distance  rectangular top  pipe , and to optimize the  construction  parameters . Taking the  rectangular top  pipe  channel  project  of the  Duandian  Station  of Jinan Metro Line 4 as the basis , the orthogonal test method was adopted to design the numerical simulation scheme , and the FLAC 3Dfinite difference software was used for simulation analysis . The  results  show  that  the  ground  surface  monitoring  data  during  the top pipe construction process are basically consistent with the simulation results;  The step length is the most sensitive factor , the thrust force at the excavation face is  an important factor , the  grouting pressure  is  the  second , and  the  frictional  resistance  has the least influence;  The step length is positively correlated with the ground surface settlement , the thrust force at the excavation face and the grouting pressure are negatively correlated with it , and the frictional resistance is negatively correlated before 25 kPa and positively  correlated after  25 kPa; The optimal construction  parameters  are : step length 1 . 5 m , thrust force at  the excavation face  200  kPa , grouting  pressure  230 kPa  and frictional  resistance 25 kPa.  The  research  results can  provide a reference for the construction of rectangular top pipe method to excavate the metro entrance and exit channel in the Jin ’an area. 

Key words :  large section;  long distance;  rectangular pipe jacking;  orthogonal text;  surface subsidence

基金项目：河北省自然科学基金优秀青年科学基金项目  (E2021210041 ) 。

作者简介：李   琳  (1998—) ,   女 ，硕士研究生 ，研究方向：岩土工程。

通信作者： 冯明月  (1981 —) ,  男 ，硕士 ，高级工程师 ，研究方向：岩土工程和地质灾害防治设计。

收稿日期：2024 - 08 - 01