盾构接收中钢套筒的受力变形特性与实测分析

廖少明; 门燕青; 赵国强; 徐伟忠

doi:10.11779/CJGE201611003

盾构接收中钢套筒的受力变形特性与实测分析 English Version

廖少明^{1, 2},
门燕青^1, ,,
赵国强³,
徐伟忠³

1. 同济大学地下建筑与工程系,上海 200092;
2. 同济大学岩土与地下工程教育部重点实验室,上海 200092;
3. 上海城建市政工程（集团）有限公司,上海 200065

基金项目: 国家重点基础研究发展计划（“973”计划）项目（2015CB057806）; 国家自然科学基金项目（51378389）; 山东省自然科学基金项目（ZR2014EEQ028）

详细信息

作者简介:
廖少明（1966- ）,男,博士,教授,博士生导师,主要从事隧道、基坑等地下工程设计与施工控制关键技术方面的教学和科研。E-mail: liaosm@126.com。

通讯作者:
门燕青，E-mail：menyanqing@126.com

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出版历程
- 收稿日期: 2015-07-24
- 发布日期: 2016-11-19

Mechanical behaviors and field tests of steel sleeves during shield receiving

1. Department of Geotechnical Engineering, Tongji Unviersity, Shanghai 200092, China;
2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;
3. Shanghai Urban Construction Municipal Engineering (Group) Co., Ltd., Shanghai 200065, China

摘要

摘要: 富水砂性地层中在盾构接收时极易发生涌水、涌砂等事故,是盾构施工过程中的重大风险源之一。以上海轨道交通11号线龙华路站钢套筒接收工法盾构接收的工程实践为依托,首先采用数值模拟对钢套筒在盾构接收施工期间的受力和变形规律进行了分析,然后通过钢套筒变形和防汛墙沉降的现场实测数据验证了钢套筒接收工法的可行性。结果表明,盾构推进使钢套筒结构的最大拉应力由后端板逐渐发展为筒体与地连墙连接部位的底部,筒体结构的环向应力为纵向应力的2~7倍、腰部以下的环向轴力增长明显、腰部累计变形将近10 mm,筒体底部的纵向应力增长明显、腰部的纵向弯矩变化明显。盾构推进导致筒体结构的底部外张、腰部内凹,筒体的径向变形由横鸭蛋变为竖鸭蛋并最终变为8字形,椭圆度达到3‰,但是盾构推进对后端板的应力和位移变化均不明显。筒体与地连墙间的接缝、钢套筒分块间的腰部接缝和底部接缝均是盾构接收中钢套筒结构受力和变形的薄弱部位。盾构完全进入钢套筒后,钢套筒结构的受力和变形最为不利。工程实测表明,采用钢套筒接收工法进行盾构接收安全、可行,但在工程实践中应重视腰部、底部和后端板位移实测数据的大的波动,规范施工操作并加强监控。
- 盾构隧道 /
- 钢套筒 /
- 力学行为 /
- 现场实测
Abstract: Water inrush and gushing can be easily induced during shield receiving in water rich sandy ground. Based on shield receiving practice at Longhua Station of Shanghai Metro Line 11, the rules of stress and deformation of steel sleeves are analyzed by using the FEM numerical method, and the field tests on deformation of steel sleeves and settlement of flood wall are carried out to verify the feasibility. The results show that the maximum tension stress location gradually changes from the back plate to the bottom of connection area between sleeve and diaphragm wall during shield arriving. The circumferential stress is 2 to 7 times the longitudinal stress. The mechanical states at the following locations change obviously: circumferential axial force below the spring, longitudinal axial force at the bottom and longitudinal moment at the spring, and the accumulated deformation at the spring reaches 10 mm. As the shield advances, the bottom will deform outward while the spring inward, therefore, the radial deformation of the sleeve changes from a lying duck egg to a standing duck egg, and finally similar to the shape of 8, with the ovality reaching nearly 3‰. However, the stress and strain have no significant changes at the back plate because of bracing constraint. The joints between the steel sleeve and the diaphragm wall and those at the spring and the bottom of blocks are the weak positions of steel sleeve for stress and deformation control during shield receiving, and the most disadvantage state occurs when the shield is completely into the steel sleeve. The in-situ measurements show that the steel sleeve receiving technology is safe and feasible when adopting the current design parameters. However, the large fluctuations and instability of field data at the spring, bottom and back plate should be paid great attention to, and standard operating

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参考文献(9)

[1]	LIAO S M, LI W L, FAN Y Y, et al. Model test on lateral loading performance of secant pile walls[J]. Journal of Performance of Constructed Facilities, 2014, 28(2): 391-401.
[2]	秦爱芳, 李永和. 人工土层冻结法加固在盾构出洞施工中的应用[J]. 岩土力学, 2004, 25(增刊2): 449-452. (QIN Ai-fang, LI Yong-he. Application of artificial soil freezing reinforcement method to shield tunneling setting out[J]. Rock and Soil Mechanics, 2004, 25(S2): 449-452. (in Chinese))
[3]	靳世鹤. 南京长江隧道盾构始发井深基坑降水方案设计[J]. 现代隧道技术, 2008, 45(3): 46-49. (JIN Shi-he. Dewatering plan for a deep shield lanching pit of Nanjing Yangtze River tunnel[J]. Modern Tunnelling Technology, 2008, 45(3): 46-49. (in Chinese))
[4]	李罡, 黄宏伟. 超大直径盾构水中进洞风险分析[J]. 地下空间与工程学报, 2009, 5(增刊): 1422-1426. (LI Gang, HUANG Hong-wei. Risk analysis on arriving into shaft of super large diameter shield machine under water[J]. Chinese Journal of Underground Space and Engineering, 2009, 5(S0): 1422-1426. (in Chinese))
[5]	王文灿. 冻结法和水平注浆在天津地铁盾构接收中的组合应用[J]. 现代隧道技术, 2013, 50(3): 183-190. (WANG Wen-can. Application of the freezing and horizontal grouting methods to the shield arrival for the Tianjin metro[J]. Modern Tunnelling Technology, 2013, 50(3): 183-190. (in Chinese))
[6]	陈珊东. 盾构到达接收辅助装置的使用分析[J]. 隧道建设, 2010, 30(4): 492-494. (CHEN Shan-dong. Analysis on application of steel sleeves in shield arrivals[J]. Tunnel Construction, 2010, 30(4): 492-494. (in Chinese))
[7]	郑石, 鞠世健. 泥水平衡盾构到达钢套筒辅助接收施工技术[J]. 现代隧道技术, 2010, 47(6): 51-56. (ZHENG Shi, JU Shi-jian. Technology of steel reception sleeve for slurry shield[J]. Modern Tunnelling Technology, 2010, 47(6): 51-56. (in Chinese))
[8]	王健. 盾构到达钢套筒辅助接收系统的改进设计及施工[J]. 现代交通技术, 2014, 11(4): 59-62. (WANG Jian. Improved design and construction technology of steel sleeves in shield auxiliary arriving system[J]. Modern Transportation Technology, 2014, 11(4): 59-62. (in Chinese))
[9]	赵立锋. 土压平衡盾构到达钢套筒辅助施工接收技术[J]. 铁道标准设计, 2013(8): 89-93. (ZHAO Li-feng. Auxiliary construction technology with steel sleeve used for the arrival of soil pressure balance shield[J]. Railway Standard Design, 2013(8): 89-93. (in Chinese))

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