砂卵石地层重叠盾构隧道掘进相互影响及控制措施研究

李雪; 张玉申; 王洋洋; 郭庆飞; 向乔; 龚子邦

doi:10.13204/j.gyjzG21063015

砂卵石地层重叠盾构隧道掘进相互影响及控制措施研究

doi: 10.13204/j.gyjzG21063015

1. 西南石油大学地球科学与技术学院, 成都 610500;
2. 成贵铁路有限责任公司, 成都 610500;
3. 中铁建大桥工程局集团第二工程有限公司, 广东深圳 518000

基金项目:

国家自然科学基金项目(51808469

四川省应用基础研究计划(22YYJC3133)。

52078213)

详细信息

作者简介:
李雪,男,1985年出生,博士,副教授,硕士生导师。

通讯作者:
张玉申,男,1995年出生,硕士研究生,zhyushe@163.com。

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- 文章访问数: 104
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- 被引次数: 0
出版历程
- 收稿日期: 2021-06-30

Study on Interplay of Overlapping Shield Tunnelling in Sandy Pebble Strata and Its Control Measures

1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
2. Chengdu-Guiyang Railway Co., Ltd., Chengdu 610500, China;
3. The 2nd Engineering Co., Ltd., China Railway Construction Bridge Engineering Bureau Group, Shenzhen 518000, China

摘要

摘要: 在重叠盾构隧道的掘进过程中,后掘进隧道施工会对先掘进隧道产生一定的影响,导致先掘进隧道结构发生变形,甚者影响结构安全,有必要对砂卵石地层重叠隧道掘进进行研究。以成都地铁6号线某区间重叠隧道为工程背景,首先对砂卵石地层重叠盾构隧道不同掘进模式进行分析,从地表沉降的角度分析选择先下后上为最优开挖方式,分析重叠隧道施工后导致地表沉降存在一定程度的叠加效应。为保证砂卵石地层重叠盾构隧道掘进过程的安全稳定,对隧道重叠区域注浆加固,增强隧道间土体的抗压、抗剪能力,最后通过实测数据与数值模拟结果相对比,误差均在5%以内;先掘进隧道地表沉降横向变化近似U形,后施工隧道掘进时地表沉降变化整体增加但趋于平缓,有着明显的"滞后性",注浆加固后土体变形得到控制。
- 砂卵石 /
- 重叠隧道 /
- 控制措施 /
- 现场监测
Abstract: In the tunneling process of overlapping shield tunnels, the construction of post tunnelling tunnels may have a certain influence on tunnels constructed first and cause structure deformation of the tunnels, even affect their safety. Therefore, it was necessary to study the tunnelling process of overlapping tunnels in sandy pebble strata. Based on the tunnel project of Chengdu Metro Line No.6, different tunnelling modes of overlapping shield tunnels in sandy pebble strata were analyzed, and the optimal tunnelling mode was selected from the perspective of subsidence of the earth’s surface. The superposition effect of subsidence caused by tunnelling of overlapping tunnels was analyzed. Grouting reinforcement between overlapping tunnels was performed to improve compressive and shear strength of soil between tunnels and ensure the safety and stability of shield tunnelling. Finally, by comparing the measured data with the numerical simulation results, the errors were all within 5%. The transverse subsidence of the earth’s surface above the tunnel constructed first was approximately U-shaped. Although the subsidence of the tunnel constructed first was still in evolution during the construction of post tunnelling tunnels, the changes tended to be stable and the subsidence was lagging obversely, soil deformation was under control after grouting reinforcement.
- sandy pebble /
- overlapping tunnel /
- control measure /
- field monitoring

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参考文献(24)

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