圆砾泥岩复合地层泥水盾构下穿房屋沉降控制技术研究

谢雄耀; 王强; 齐勇; 李军; 于兴国

doi:10.11779/CJGE201709006

圆砾泥岩复合地层泥水盾构下穿房屋沉降控制技术研究 English Version

谢雄耀^{1, 2},
王强^{1, 2},
齐勇³,
李军^{1, 2},
于兴国³

1. 同济大学岩土及地下工程教育部重点实验室,上海 200092;
2. 同济大学地下建筑与工程系,上海 200092;
3. 中铁十六局集团北京轨道交通工程建设有限公司,北京 101100

基金项目: 上海市科学技术委员会资助计划项目（15DZ1203800）; 广西科学研究与技术开发计划项目（2015BC17047,2015AA08192）

详细信息

作者简介:
谢雄耀(1972- ),男,博士,教授,博士生导师,主要从事隧道与地下工程健康检测、风险与防灾方面的教学与研究工作。E-mail：xiexiongyao@tongji.edu.cn。

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- 收稿日期: 2016-05-29
- 发布日期: 2017-09-24

Settlement control of slurry shield tunnelling crossing adjacent buildings in mixed ground of round gravel and mudstone

XIE Xiong-yao^{1, 2},
WANG Qiang^{1, 2},
QI Yong³,
LI Jun^{1, 2},
YU Xing-guo³

1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Shanghai 200092, China;
2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
3. China Railway 16th Bureau Group Beijing Metro Engineering Construction Co., Ltd., Beijing 101100, China

摘要

摘要: 圆砾泥岩复合地层中盾构微扰动施工控制是岩土工程实践中面临的难题。南宁地铁1号线盾构下穿友爱居民小组面临圆砾与泥岩复合地层的挑战,首先对泥水盾构泥浆性能指标进行优化,采用现场试验确定了富水圆砾地层袖阀管注浆加固浆液配合比;利用自动化监测系统对盾构下穿房屋的沉降进行实时监控,并借助及时通讯工具实现穿越施工中信息化施工;定义圆砾泥岩复合地层盾构开挖面内泥岩高度与盾构机刀盘直径的比值为复合比 $\lambda$ ,分析掘进参数平均值随 $\lambda$ 的变化规律。通过现场实测结果表明：袖阀管注浆能够有效的控制建筑物沉降,自动化监测能够实时反映盾构推进导致房屋变形,为施工反馈控制提供依据,泥水盾构在圆砾泥岩复合地层中会遇到开挖仓压力波动过大,刀盘扭矩、推力增大,贯入度降低等现象。当 $\lambda \le 0.15$ 上述现象基本不发生;当 $0.15\le \lambda 0.6$ 时,参数平均值波动最剧烈,对沉降控制十分不利;当 $\lambda \ge 0.6$ 时,扭矩和总推力进一步增大,但开挖仓压力波动情况稍弱而贯入度会进一步降低。要以盾构开挖仓压力控制为指标而非追求推进速度,提高转速、降低泥浆黏度是减少参数波动的有效手段。
- 泥水盾构掘进 /
- 自动化监测 /
- 袖阀管注浆 /
- 复合比 /
- 参数分析 /
- 圆砾泥岩
Abstract: The micro-disturbed construction in mixed ground is a major challenge in the shield tunnelling construction. The Nanning metro line 1 crossing You'ai buildings is confronted with the challenge of mixed ground of round gravel and mudstone. The sleeve-valve-pipe grouting technology is applied in the round gravel with strong permeability by using the field tests to determine the mixture ratio of composite grout. The deformation monitoring of adjacent buildings and structures of shield-driven tunnels together with feedback-control during construction is the core part of the micro-disturbed construction control. The mixed ratio $\lambda$ of round gravel and mudstone is defined and the variation of tunnelling parameters is analyzed with different $\lambda$ . The measured results show that the sleeve-valve-pipe grouting is quite useful to reduce settlement. The automatic monitoring can reflect the influence of the shield tunnelling construction on the surroundings. The average values of slurry pressure, torque and total thrust significantly increase, while the penetration rate decreases when $0.15\le \lambda 0.6$ , which is quite bad for settlement control. When $\lambda \ge 0.6$ , the torque and total thrust continue to increase while the fluctuation of slurry pressure diminishes and the penetration rate is very low. The priority is to control the slurry pressure in excavation chamber and the grouting is crucial to control settlement. Moreover, it is beneficial to modify the slurry properties, to reduce the advance speed and to increase the cycle time when tunnelling in mudstone.
- shield tunnelling /
- automatic monitoring /
- sleeve-value-pipe grouting /
- mixed ratio /
- parametric analysis /
- round gravel and mudstone

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参考文献(19)

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圆砾泥岩复合地层泥水盾构下穿房屋沉降控制技术研究 English Version

作者简介: 谢雄耀(1972- ),男,博士,教授,博士生导师,主要从事隧道与地下工程健康检测、风险与防灾方面的教学与研究工作。E-mail：xiexiongyao@tongji.edu.cn。

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Settlement control of slurry shield tunnelling crossing adjacent buildings in mixed ground of round gravel and mudstone

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目录

作者简介:
谢雄耀(1972- ),男,博士,教授,博士生导师,主要从事隧道与地下工程健康检测、风险与防灾方面的教学与研究工作。E-mail：xiexiongyao@tongji.edu.cn。