基于土压盾构的城市地铁隧道构筑过程地表沉降规律

王晓睿; 姜洪建; 朱坤; 张丰尧; 刘晓南

doi:10.3799/dqkx.2019.269

基于土压盾构的城市地铁隧道构筑过程地表沉降规律

doi: 10.3799/dqkx.2019.269

王晓睿^1,2,,
姜洪建^1,3,
朱坤¹,
张丰尧⁴,
刘晓南⁵

1.
华北水利水电大学地球科学与工程学院, 河南郑州 450045
2.
北京交通大学经管学院, 北京 100044
3.
深圳市勘察测绘院(集团)有限公司, 广东深圳 518028
4.
河南工业大学土木建筑学院, 河南郑州 450001
5.
南阳通途公路勘察设计有限公司, 河南南阳 473000

基金项目:

国家自然科学基金项目 51879245

河南省科技攻关项目 182102210062

详细信息

作者简介:
王晓睿(1975-), 男, 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

中图分类号: P642
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出版历程
- 收稿日期: 2018-09-29
- 刊出日期: 2019-12-15

Research on Ground Settlement Laws of Urban Subway Tunnel Construction Process Based on Earth Pressure Shield

1.
College of Geosciences and Engineering, 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.
Shenzhen Geotechnical Investigation and Surveying Institute(Group) Co., Ltd., Shenzhen 518028, China
4.
School of Civil Engineering and Architecture, Henan University of Technology, Zhengzhou 450001, China
5.
Nanyang Tongtu Highway Geotechnical Investigation and Surveying Co., Ltd., Nanyang 473000, China

摘要

摘要: 通过经验、理论分析和数值模拟等预测方法，并结合实测数据研究分析土压盾构施工引起的地表沉降问题.分析结果表明：预测方法估算的最大沉降值总高于实测的沉降值；Oteo方法的曲线形态更优化；当隧道埋深较浅时，Loganathan-Poulos、Sagaseta、Peck和Verruijt-Booker方法均过高估算了最大沉降量，且Loganathan-Poulos、Sagaseta和Verruijt-Booker方法给出的沉降槽偏宽；数值模拟方法比分析和经验方法更有效，可以有效模拟施工过程.根据研究结果，经验、理论分析和数值模拟方法具有一定的安全储备空间，可用于软土地层中土压盾构施工引起的地面沉降预测.
- 隧道工程 /
- 土压盾构 /
- 地表沉降 /
- 预测方法 /
- 数值模拟 /
- 岩土工程
Abstract: Through the prediction methods such as experience, theoretical analysis and numerical simulation, combined with the measured data, the ground settlement caused by the earth pressure shield construction is analyzed. The analysis results show that the maximum settlement estimated by the prediction method is always higher than the measured settlement value; the curve shape of the Oteo method is more optimized; when the tunnel depth is shallow, the Loganathan-Poulos, Sagaseta, Peck and Verruijt-Booker methods all overestimate the maximum settlement, and the settling troughs given by the Loganathan-Poulos, Sagaseta and Verruijt-Booker methods are wide; the numerical simulation method, which is more effective than the analytical and empirical method, can simulate the construction process effectively. According to the research results, the experience, theoretical analysis and numerical simulation methods have a certain safety reserve space, and these three methords can be used for ground subsidence prediction caused by earth pressure shield construction in soft soil layer.
- tunneling engineering /
- earth pressure shield /
- surface subsidence /
- prediction method /
- numerical simulation /
- geotechnical engineering

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图 1 沉降槽示意图

Fig. 1. Settling tank scheme

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图 2 有限元网格与全局坐标系

Fig. 2. Finite element mesh and global coordinate system

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图 3 地层剖面Ⅰ

Fig. 3. Stratigraphic section Ⅰ

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图 4 剖面Ⅰ横向沉降槽

Fig. 4. Section Ⅰ transverse settlement trough

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图 5 地层剖面Ⅱ

Fig. 5. Stratigraphic section Ⅱ

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图 6 剖面Ⅱ横向沉降槽

Fig. 6. Section Ⅱ transverse settlement trough

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图 7 地层剖面Ⅲ

Fig. 7. Stratigraphic section Ⅲ

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图 8 剖面Ⅲ横向沉降槽

Fig. 8. Section Ⅲ transverse settlement trough

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表 1 岩土体物理力学指标

Table 1. Rock and soil physical and mechanical indexes

土体	细粒含量(%)	粘聚力(kPa)	摩擦角(°)	土体弹性模量(MPa)
填土	15~80	5	28	10
砂土	0~25	10	35	80
黏质砂土	25~40	15	33	100
砂质黏土	40~60	25	32	130
黏土	60~85	40	30	170
塑性黏土	85~95	60	28	220

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表 2 经验公式参数值

Table 2. Empirical formula parameter values

断面	Peck		Sagaseta		Verruiit-Booker			Loganathan-Poulos			Oteo
	i (m)	Vs (%)	H (m)	Vs (%)	ε (%)	ν	H (m)	ν	H (m)	g (m)	ψ	γ (kN/m³)	E (kPa)	ν	i (m)
	i (m)	Vs (%)	H (m)	Vs (%)	ε (%)	ν	H (m)	ν	H (m)	g (m)	ψ	γ (kN/m³)	E (kPa)	ν	i (m)
Ⅰ	4.9	0.69	11.0	0.69	0.25	0.29	11.0	0.29	11.0	0.012	0.7	20.2	600	0.29	4.9
Ⅱ	6.3	0.50	14.2	0.50	0.18	0.30	14.2	0.30	14.2	0.012	0.3	20.2	467	0.30	6.3
Ⅲ	8.3	0.23	17.7	0.23	0.18	0.29	17.7	0.29	17.7	0.012	0.3	20.4	374	0.29	8.3

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参考文献(18)

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