[1]李晓龙,栗鹏超,刘小锋,等.富水粉细砂层联络通道顶管施工地表沉降分析[J].郑州大学学报(工学版),2024,45(pre):2.[doi:10. 13705 / j. issn. 1671-6833. 2025. 01. 009]
　LI Xiaolong,LI Pengchao,LIU Xiaofeng,et al.Analysis on Surface Settlement of Pipe Jacking Method for Constrution of Contact Channel in Water-rich Silty Fine Sand Layer[J].Journal of Zhengzhou University (Engineering Science),2024,45(pre):2.[doi:10. 13705 / j. issn. 1671-6833. 2025. 01. 009]
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富水粉细砂层联络通道顶管施工地表沉降分析()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
45
期数:
2024年pre
页码:
2
栏目:
出版日期:
2024-12-31

文章信息/Info

Title:
Analysis on Surface Settlement of Pipe Jacking Method for Constrution of Contact Channel in Water-rich Silty Fine Sand Layer
作者:
李晓龙1; 栗鹏超1; 刘小锋1; 孙立军2; 郭长龙2; 何况3
(1.郑州大学 水利与交通学院,河南 郑州,450001;2.中铁十四局集团有限公司,山东 济南,250101;3.郑州地铁集团有限公司,河南 郑州,450000)
Author(s):
LI Xiaolong;  LI Pengchao;  LIU Xiaofeng;  SUN Lijun;  GUO Changlong;  HE Kuang
(1. School of Water Conservancy and Civil Engineering, Zhengzhou University, Zhengzhou 450001, China 2. China Railway 14th Bureau Group Corporation Limited, Jinan 250101, China 3. Zhengzhou Metro Group Corporation Limited, Zhengzhou 450000, China)
关键词:
联络通道; 顶管法; 数值模拟; 现场监测; 地表沉降
Keywords:
Contact channel;  Mechanical pipe jacking method;  Numerical simulation;  Field monitoring;  Surface settlement
分类号:
U 231.3
DOI:
10. 13705 / j. issn. 1671-6833. 2025. 01. 009
文献标志码:
A
摘要:
为研究富水粉细砂层地铁联络通道顶管法施工对地层沉降的影响，对郑州地铁12号线08工区埋深15 m、长7.5 m的联络通道在顶管施工过程中的地面沉降进行了监测，并结合“地层-主隧道-内支撑-联络通道”体系三维数值模拟，深入分析了顶管掘进过程中地表沉降的时空演化规律。结果表明：地表沉降量随顶管机的推进逐渐增大，顶推到位后达到最大沉降值，其中台车就位、始发破洞及接收破洞阶段产生的沉降增量明显大于其它开挖阶段，设备拆除后，受卸载作用影响，地层产生一定量回弹，沉降值减小；地表沉降曲面呈漏斗状，沿垂直于联络通道中心线方向左右对称，沿平行于中心线方向不对称，最大沉降值位于纵向距离联络通道中心靠近始发端3 m处；联络通道顶管法施工对地表横向影响范围更大，地表沉降集中发生区域近似椭圆形，其长轴垂直于联络通道轴线。
Abstract:
In order to study the influence of pipe jacking method on stratum settlement of subway contact channel in water-rich silty sand layer, the ground settlement of contact channel with 15 m depth and 7.5 m length in 08 work area of Zhengzhou Metro Line 12 during pipe jacking construction was monitored, and the spatial and temporal evolution law of ground settlement during pipe jacking construction was analyzed in combination with 3-D numerical simulation of "stratum-main tunnel-inner support- contact channel " system. The ground settlement increases gradually with the pushing of pipe jacking machine, and reaches the maximum settlement value after pushing in place, in which the settlement increment produced in the stage of trolley positioning, starting hole breaking and receiving hole breaking is obviously larger than that in other excavation stages. After the equipment is dismantled, the stratum will rebound a certain amount due to unloading effect, and the settlement value will decrease. The surface settlement curve is funnel-shaped, symmetrical along the direction perpendicular to the center line of the contact channel, asymmetrical along the direction parallel to the center line, and the maximum settlement value is located 3 m away from the center of the contact channel and close to the starting end in the longitudinal direction. The horizontal influence range of the contact channel pipe jacking method on the surface is larger, and the concentrated area of the surface settlement is approximately elliptical, and its long axis is perpendicular to the axis of the contact channel

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更新日期/Last Update: 2024-10-08