装配式钢管混凝土内支撑在盾构竖井深基坑工程中的应用

兰州理工大学学报 ›› 2020, Vol. 46 ›› Issue (6): 131-136.

装配式钢管混凝土内支撑在盾构竖井深基坑工程中的应用

郭雪源^1,2, 张明聚², 武立伟¹, 韩流涛¹

1.华北理工大学建筑工程学院, 河北唐山 063000;
2.北京工业大学北京城市交通协同创新中心, 北京 100124

收稿日期:2019-10-11 出版日期:2020-12-28 发布日期:2021-01-07
作者简介:郭雪源(1989-),男,河北唐山人,博士,讲师
基金资助:
国家自然科学基金(51538001),河北省自然科学基金(E2020209086),唐山市科技局项目(19150240E)

Engineering application of prefabricated concrete-filled tube bracing in deep excavation for shield shaft

GUO Xue-yuan^1,2, ZHANG Ming-ju², WU Li-wei¹, HAN Liu-tao¹

1. College of Civil and Architectural Engineering,North China University of Science and Technology, Tangshan 063000, China;
2. Beijing Collaborative Innovation Center for Metropolitan Transportation, Beijing University of Technology, Beijing 100124, China

Received:2019-10-11 Online:2020-12-28 Published:2021-01-07

摘要/Abstract

摘要： 针对盾构竖井内开挖深基坑时出土作业面小、基坑深度大等特点,提出一种装配式钢管混凝土(PCFT)内支撑结构.该PCFT内支撑结构由双肢矩形钢管轻集料混凝土构件和锚固件通过高强螺栓装配而成.以北京地铁17号线某盾构竖井深基坑工程为背景,开展PCFT内支撑基坑支护设计及应用.对支撑轴力、围护桩变形、桩顶位移和地表沉降进行了信息化监测,并在工程实践中总结和优化PCFT内支撑设计及施工技术.实施效果和监测结果表明:PCFT内支撑架设施工技术简便易行,在有效控制基坑稳定和周边环境安全的基础上,极大地提高了盾构竖井深基坑工程施工安全性和便利性.

关键词: 盾构竖井基坑工程, 基坑内支撑, 钢管混凝土, 装配式结构

Abstract: In view of reality of small working surface and large depth of foundation pit when a deep foundation pit is excavated in shield shaft, a prefabricated concrete filled tube (PCFT) internal bracing structure is presented. The PCFT internal bracing consists of lightweight aggregate concrete members and anchors composed of double-limb rectangular steel tubes, and assembled by high-strength bolts.Taking the deep foundation pit project of a shield shaft in Beijing Metro Line 17 as background, research on the design and application of PCFT internal bracing foundation pit support were carried out. In the study, the information monitoring of supporting axial force, retaining pile deformation, pile top displacement and surface settlement was also carried out. The design technology of PCFT internal bracing is summarized and optimized later in engineering practice. The implementation effect and monitoring results show that erection construction technology of PCFT internal bracing is simple and easy. On the basis of effectively controlling the stability of the foundation pit and the safety of the surrounding environment, the PCFT internal bracing greatly improves the safety and convenience of shield shaft deep foundation pit construction.

Key words: deep excavation of shield shaft, bracing of pit supporting, concrete-filled tube, prefabricated structure

中图分类号:

TU470
TU942

郭雪源, 张明聚, 武立伟, 韩流涛. 装配式钢管混凝土内支撑在盾构竖井深基坑工程中的应用[J]. 兰州理工大学学报, 2020, 46(6): 131-136.

GUO Xue-yuan, ZHANG Ming-ju, WU Li-wei, HAN Liu-tao. Engineering application of prefabricated concrete-filled tube bracing in deep excavation for shield shaft[J]. Journal of Lanzhou University of Technology, 2020, 46(6): 131-136.

参考文献

[1] TAN Y,WEI B,ZHOU X,et al.Lessons learned from construction of Shanghai metro stations:importance of quick excavation, prompt propping,timely casting,and segmented construction [J].Journal of Performance of Constructed Facilities,2014,29(4):04014096.
[2] WANG W D,WANG J H,LI Q,et al.Design and performance of large excavations for Shanghai Hongqiao International Airport Transport Hub using combined retaining structures [J].Journal of Aerospace Engineering,2014,28(6):A4014002.
[3] 刘树亚,潘晓明,欧阳蓉,等.用钢筋混凝土支撑代替钢支撑的深基坑支护特性研究 [J].岩土工程学报,2012,34(增刊1):309-314.
[4] XU C,CHEN Q,WANG Y,et al.Dynamic deformation control of retaining structures of a deep excavation [J].Journal of Performance of Constructed Facilities,2015,30(4):04015071.
[5] 叶建军,程大春,明军.基坑钢筋混凝土临时支撑梁绿色拆除爆破技术 [J].爆破,2017,34(1):101-107.
[6] 刘伟,董超,徐岗,等.临地铁超深基坑复杂混凝土内支撑拆除施工技术 [J].施工技术,2017,46(6):8-11.
[7] 詹集明.预制装配式基坑支护体系 [J].福建建筑,1996(1):45-47.
[8] 谢伟,胡文发.拼装式深基坑内支撑体系研究 [J].四川建筑,2002(1):55-57.
[9] PARK J S,JOO Y S,KIM N K.New earth retention system with prestressed wales in an urban excavation [J].Journal of geotechnical and geoenvironmental engineering,2009,135(11):1596-1604.
[10] 刘发前.装配式型钢内支撑稳定性设计 [J].城市道桥与防洪,2016,5(5):81-83.
[11] 沈晶晶.装配式型钢斜抛撑在基坑支护工程中的应用 [J].山西建筑,2016,42(7):98-99.
[12] 张明聚,郭雪源,马栋,等.基坑工程装配式钢管混凝土内支撑体系设计方法 [J].北京工业大学学报,2016,42(12):88-96.
[13] ZHANG Mingju,GUO Xueyuan,LI Zhanguo.Experimental study on high performance filling lightweight aggregateconcrete [C]//Fundamental Research in Structural Engineering Retrospective and Prospective.Beijing:Science Press Beijing,2016:1757-1762.