首页期刊在线 2022年（第25卷）第10期

地铁隧道侧穿桥梁桩基工程注浆加固控制及监测管理研究

杨磊1朱富丽2张浩3

Grouting Reinforcement Control and Monitoring Management of Metro Tunnel Sidepassing Bridge Pile Foundation Engineering

YANG LeiZHU FuliZHANG Hao

作者信息:

1.1.河南信息统计职业学院建筑工程系， 450008，郑州；
2.2.河南牧业经济学院信息化办公室， 450044，郑州；
3.3.郑州大学土木工程学院， 450001，郑州
Affiliation:

Department of Architectural Engineering, Henan Vocational College of Information Statistics, 450008, Zhengzhou, China
关键词:

地铁隧道;桥梁桩基;注浆加固;监测管理
Key words:

metro tunnel;bridge pile foundation;grouting reinforcement;monitoring management
DOI:

10.16037/j.1007-869x.2022.10.031
中图分类号/CLCN:

U455.49
栏目/Col:

施工技术

摘要:

以北京某地铁隧道侧穿桥梁桩基工程为依托，结合桥梁的结构型式和水文地质条件，提出桥梁桩基注浆加固与掌子面深孔注浆等措施的综合控制方案。通过数值模拟及现场监测，对比分析了复杂地质条件下地铁隧道侧穿桥梁桩基的施工保护与变形控制。结果表明：不良地质条件下的高压注浆，会引起邻近左、右两线隧道区域发生以陡升为关键特征的瞬时位移，使桥梁下方地表及桥梁承台呈现出“M”型的抬升；掌子面超前深孔注浆是地铁隧道侧穿桥梁桩基施工的关键控制手段，尽管地表受注浆膨胀应力作用出现轻微的局部抬升，但桥梁桩基的累计沉降和倾斜均未超过规定指标；注浆工艺及注浆参数对地层变形及基桩倾斜影响较大，须着眼于现场的风险监控与管理，以便将监测数据反馈至现场指导施工。

Abstracts:

Based on a project of Beijing metro tunnel side-passing bridge pile foundation engineering, considering the bridge structure and hydrogeological conditions, a comprehensive control scheme including measures of bridge pier grouting reinforcement and tunnel face deep-hole grouting is put forward. Through numerical analysis and field monitoring, the construction protection and deformation control of metro tunnel side-passing bridge pile foundation in complex geological condition are comparatively analyzed. Results show that the high pressure grouting in unfavored geological condition will cause the instantaneous displacement with the key feature of steep rise in the area adjacent to the left and right tunnels which causes the surface and bridge cap to display the ′M′-shaped uplift. Tunnel face advanced deep-hole grouting is a key control measure for metro tunnel side-passing bridge pile foundation construction. Although slight local uplift occurs on the ground surface due to grouting expansion stress, the accumulated settlement and inclination of bridge pile foundation will not exceed the specified index. Grouting technology and parameters have a great influence on stratum deformation and foundation pile tilt, so it is necessary to focus on site risk monitoring and management, so that monitoring data can be fed back to the site for construction guidance.