超大断面矩形顶管隧道施工动态变形规律

王晓睿; 周峰; 张振; 郭佳

doi:10.3799/dqkx.2016.136

超大断面矩形顶管隧道施工动态变形规律

doi: 10.3799/dqkx.2016.136

王晓睿^1,2,,
周峰³,
张振^1,4,
郭佳¹

1.
华北水利水电大学资源与环境学院，河南郑州 450045
2.
北京交通大学经管学院，北京 100044
3.
洛阳璟信公路工程科技发展有限公司，河南洛阳 471000
4.
上海隧道工程股份有限公司，上海 200000

基金项目:

国家自然科学基金资助项目 51004049

详细信息

作者简介:
王晓睿(1975-)，男，副教授，主要从事数值计算的研究及其岩石裂纹扩展方面的应用.E-mail: 1691041993@qq.com

中图分类号: P634
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出版历程
- 收稿日期: 2016-01-10
- 刊出日期: 2016-11-15

Dynamic Deformation of the Oversized Cross-Section Rectangular Pipe-Jacking Tunnel

1.
School of Resourses and Environment, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
2.
School of Economics and Management, Beijing Jiaotong University, Beijing 100044, China
3.
Luoyang Jinxin Highway Engineering Technology Development Co. Ltd., Luoyang 471000, China
4.
Shanghai Tunnel Engineering Co. Ltd., Shanghai 200000, China

摘要

摘要: 在城市地下工程建设中，新建大断面隧道近距离下穿施工对既有道路造成的扰动不可避免.分析地表变形特点及其变化规律对减小隧道施工造成的环境影响具有重大意义.结合郑州市沈庄北路-商鼎路下穿中州大道矩形顶管隧道工程的工程实践，采用现场地表变形实测统计分析并运用数值模拟方法对顶管顶进施工过程进行动态分析，揭示隧道开挖过程中的地表变化规律；数值模拟预测分析了顶管施工对既有道路的影响，从而优化施工方法和技术参数，提出相应的控制措施，并通过工程变形监测数据验证了预测分析的有效性.
- 隧道工程 /
- 矩形顶管 /
- 变形监测 /
- 数值模拟 /
- 工程地质
Abstract: This paper discusses the engineering of a rectangulan pipe jacking project for the construction of the Shenzhuang Road-Shangding Road underpass in Zhengzhou.Roads inevitably deform excavation of a new large tunnel nearby in an urban underground engineering project. It is of great significanceto analyze the characteristics of ground surface deformation and their laws change to reduce the environmental impact of tunnel construction. Combined with the engineering practice of Zhengzhou Shen Zhuang Road-Shangding Road Underpass in Zhongzhou road tunnel engineering of rectangular pipe jacking.In-situ measured statistical analysis of ground surface deformation and the numerical simulation method of dynamic process of jacking pipe jacking construction analysis, it is found in this study the laws of the surface variation in the process of tunnel excavation.Numerical simulation can be applied to predict the influence of pipe jacking construction of existing road, to optimize the construction method and technical parameters, on basis of which the corresponding control measures can be put forward.The effectiveness of the forecast analysis has been verifiedthrough the engineering deformation monitoring data in this study.
- tunnel project /
- rectangular pipe jacking /
- deformationmonitoring /
- numerical simulation /
- engineering geology

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图 1 沈庄北路-商鼎路下穿隧道平面示意

Fig. 1. Shenzhuang North road-Shangding road tunnel under the plane

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图 2 工程地质剖面

Fig. 2. Engineering geologic profile

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图 3 顶管地面监测点布置示意

Fig. 3. The pipe jacking ground monitoring arrangement

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图 4 沈庄北路隧道152 m断面处地表沉降变化曲线

Fig. 4. Shenzhuang Road surface 152 m tunnel section of the settlement variation graph

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图 5 数值计算模型网格

Fig. 5. Numerical model grid chart

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图 6 隧道开挖时的地层沉降

Fig. 6. The ground settlement when tunnel excavation

a.1.5 m; b.3.0 m; c.4.5 m; d.6.0 m; e.7.5 m; f.9.0 m; g.10.5 m; h.12.0 m; i.13.5 m; j.15.0 m

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图 7 地表沿顶管横向方向的变形(a)和纵向方向的沉降(b)

Fig. 7. Surface deformation along the transverse direction (a) and settlement of surface along the longitudinal direction (b) of the pipe jacking

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表 1 模型所含地层及材料物理参数

Table 1. Models included in the formation and the physical parameters of materials

序号	材料	属性	厚度(m)	天然容重 (KN/m³)	粘聚力 (c/kPa)	内摩擦角φ (°)	泊松比	弹性模量 (MPa)
1	杂填土	土层1	2.00	18.5	5.0	5.0	0.33	7.50
2	粉土	土层2	3.00	19.9	10.6	21.5	0.35	10.23
3	粉质粘土	土层3	10.00	19.6	22.0	15.9	0.35	12.03
4	粉砂	土层4	30.00	20.3	3.0	32.0	0.30	5.60
5	注浆	注浆材料	0.30	20.0			0.48	0.95
6	C50混凝土	管节	0.70	25.0			0.20	35 000.00
7	顶管机	钢壳	0.35	76.0			0.15	200 000.00

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