复合地层下穿高铁矩形顶管盾构隧道的施工稳定性

宁茂权; 晋学辉; 刘朝钦; 麻建飞; 崔光耀

doi:10.11858/gywlxb.20220592

复合地层下穿高铁矩形顶管盾构隧道的施工稳定性

doi: 10.11858/gywlxb.20220592

宁茂权^{1, 2,},
晋学辉²,
刘朝钦²,
麻建飞³,
崔光耀^4,*, ,

1.
中铁第四勘察设计院集团有限公司, 湖北武汉　430064
2.
海峡（福建）交通工程设计有限公司, 福建福州　350004
3.
北京交通大学土木建筑工程学院, 北京　100044
4.
北方工业大学土木工程学院, 北京　100144

基金项目: 国家自然科学基金（52178378）；中铁第四勘察设计院集团有限公司科技研究开发项目（2020K143）

详细信息

作者简介:
宁茂权（1972－），男，硕士，高级工程师，主要从事隧道与地下工程的勘察设计研究.E-mail：ninmquan12@126.com

通讯作者:
崔光耀（1983－），男，博士，教授，主要从事隧道与地下工程研究. E-mail：cyao456@163.com

中图分类号: O342; U45
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出版历程
- 收稿日期: 2022-05-23
- 修回日期: 2022-06-11
- 刊出日期: 2022-12-05

Construction Stability of Rectangular Pipe Jacking Shield Tunnel Crossing High-Speed Railway in Composite Stratum

NING Maoquan^{1, 2
,},
JIN Xuehui²,
LIU Chaoqin²,
MA Jianfei³,
CUI Guangyao^{4,*
, ,}

1.
China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430064, Hubei, China
2.
Haixia Traffic Engineering Design Co., Ltd., Fuzhou 350004, Fujian, China
3.
School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
4.
School of Civil Engineering, North China University of Technology, Beijing 100144, China

摘要

摘要: 为保证矩形顶管盾构隧道下穿高铁近接施工的稳定性，以某火车站东侧地下通道工程为例，采用ABAQUS有限元分析软件建立了复合地层下穿高铁矩形顶管盾构隧道近接施工的精细化计算模型，分析了硬岩比、埋深因子和管节因子对复合地层顶管盾构隧道近接下穿施工时地表位移、轨道变形、管节收敛和安全系数的影响。结果表明：随着复合地层硬岩比的增加、埋深因子的减小和管节因子的增加，矩形顶管盾构隧道施工时的地层位移极值、地表沉降、上覆高铁轨道变形和管节收敛逐渐减小，管节安全系数逐渐增加，复合地层矩形顶管盾构隧道的施工稳定性提升。研究结果可为类似工程施工提供参考。
- 矩形顶管盾构隧道 /
- 复合地层 /
- 施工稳定性 /
- 近接施工
Abstract: To ensure the construction stability of rectangular pipe jacking shield tunnel, taking the underground passage project on the east side of a railway station as the case study, the refined model of rectangular pipe jacking shield tunnel under high-speed railway in composite stratum was established using the finite element software ABAQUS. The effects of hard rock ratio, buried depth and pipe joint factors on surface displacement, track deformation, pipe joint convergence and safety factor were analyzed. The results show that with the increase of hard rock ratio in composite stratum, the decrease of buried depth factor and the increase of pipe joint factor, the extreme value of stratum displacement, surface settlement, the overlying high-speed rail track deformation and pipe joint convergence gradually decrease, the safety factor of pipe joint gradually increases, and the construction stability of rectangular pipe jacking shield in composite stratum becomes better and better. The research conclusion can provide reference for similar projects.
- rectangular pipe jacking shield /
- composite stratum /
- construction stability /
- close-space construction

HTML全文

图 1 矩形地下通道与高铁的位置关系

Figure 1. Location relationship between rectangular underpass and high-speed railway

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图 2 复合地层

Figure 2. Composite stratum

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图 3 计算模型

Figure 3. Numerical model

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图 4 监测系统

Figure 4. Monitoring system

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图 5 矩形顶管盾构在不同硬岩比复合地层中顶进后的位移云图

Figure 5. Displacement nephogram of rectangular pipe jacking shield after jacking in composite strata with different hard rock ratios

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图 6 地表中心点沉降、轨道变形和管节的位移收敛曲线

Figure 6. Settlement at the center of the surface, track deformation and segment convergence

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图 7 轨道的应力-距离曲线

Figure 7. Stress-distance curves of track

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图 8 管节安全系数

Figure 8. Safety factor of segments

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图 9 埋深因子ζ_C的影响

Figure 9. Influence of buried depth factor ζ_C

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图 10 不同ζ_C下轨道的应力-距离曲线

Figure 10. Stress-distance curves of track with different ζ_C

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图 11 管节因子ζ_d的影响

Figure 11. Influence of segment factor ζ_d

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图 12 不同ζ_d下轨道的应力曲线

Figure 12. Stress curves of strack with different ζ_d

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表 1 计算工况

Table 1. Calculation cases

Influence factor	Value of influence factor	Impact factor	Value of impact factor
Burial depth	C₀=4.2 m	ζ_C= C/C₀	1.00，1.50，2.00
Hard rock ratio	h₀=7.65 m	n= h/h₀	0，0.25，0.50，0.75，1.00
Length of pipe joint	d₀=1.8 m	ζ_d= d/d₀	1.00，2.00，3.00

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表 2 计算参数

Table 2. Calculation parameters

Structure	Density/(kg·m⁻³)	Elastic modulus/MPa	Poisson’s ratio	Internal friction angle/(°)	Cohesion/MPa
Soft rock	1860	210	0.37	18	0.0005
Hard rock	2500	6000	0.25	45	1
Track	7800	2.06×10⁵	0.23
Ballast	2500	130	0.35
Segment	2500	3.45×10⁴	0.25
Sleeper	2450	3.15×10⁴	0.20
Foundation	2300	2.80×10⁴	0.33

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