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施工技术

富水地层超深装配式竖井水下机械法掘进施工技术——以南京某沉井式停车设施建设项目为例

  • 张振光 ,
  • 徐杰 ,
  • 汪盛 ,
  • 蒋海里 ,
  • 郝亮 ,
  • 付武荣
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  • (1. 上海公路桥梁(集团)有限公司, 上海〓200433; 2. 上海城市基础设施更新工程技术研究中心, 上海〓200032; 3. 南京市建邺区高新科技投资集团有限公司, 江苏南京〓210019)
张振光(1981—),男,河南焦作人,2007年毕业于四川大学,岩土工程专业,硕士,高级工程师,长期从事盾构法与顶管法隧道施工技术、超深装配式竖井智能建造等领域的研究工作。 E-mail: light-322@163.com。 *通信作者: 徐杰, E-mail: xujie14315@hotmail.com。

网络出版日期: 2022-04-03

基金资助

上海市科学技术委员会上海工程技术研究中心与专业技术服务平台项目(20DZ2251900); 上海市青年科技英才扬帆计划(20YF1416200)

Underwater Mechanical Tunneling Technology of an UltraDeep Assembled Shaft in WaterRich Stratum: a Case Study of Sinking Shaft Underground Parking Garage in Nanjing, China

  • ZHANG Zhenguang ,
  • XU Jie ,
  • WANG Sheng ,
  • JIANG Haili ,
  • HAO Liang ,
  • FU Wurong
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  • (1.Shanghai Road and Bridge Group Co.,Ltd.,Shanghai 200433,China;2.Shanghai Engineering Research Center of Urban Infrastructure Renewal,Shanghai 200032,China;3.Nanjing Jianye District High-Tech Investment Group Co.,Ltd.,Nanjing 210019, Jiangsu,China)

Online published: 2022-04-03

摘要

针对在建筑密度大、可利用空间有限的中心城区施工超深竖井面临的一系列技术难题,介绍一种新型竖井施工工艺及全自动机械化装备施工预制装配式圆形竖井的方法,重点探讨装配式竖井管片设计及拼装、不排水掘进技术、受控下沉技术、竖井姿态控制及纠偏工艺。工程实践表明: 1)采用装配式建造理念及不排水掘进,可有效控制侧壁地层、开挖面的失稳风险以及周边地面沉降; 2)多重姿态监控系统、偏移判定标准及纠偏措施可确保竖井姿态; 3)采用超挖配合受控下沉,无卡滞及突沉风险。

本文引用格式

张振光 , 徐杰 , 汪盛 , 蒋海里 , 郝亮 , 付武荣 .

富水地层超深装配式竖井水下机械法掘进施工技术——以南京某沉井式停车设施建设项目为例

[J]. 隧道建设, 2022 , 42(3) : 492 -500 . DOI: 10.3973/j.issn.2096-4498.2022.03.019

Abstract

Ultradeep shaft construction in centrallylocated urban areas with large building density and small available space often faces a series of technical problems. Hence, a new shaftconstruction technology and automatic mechanical machine are introduced to address these problems. Based on the construction of a fullyprefabricated assembled shaft, the design and assembly of prefabricated shaft segments, undrained mechanical excavating technology, sinking control technology, shaft attitude control, and deviation correction technology are studied. The engineering practices show the following: (1) Prefabricated construction and undrained excavation can effectively control the instability risk of sidewalls and excavation faces, as well as the surface settlement. (2) Multiple attitude monitoring system with deviation judgment standards and correction measurements can ensure the shaft axis. (3) Adoption of overexcavation combined with the controlled sinking method can completely avoid sudden sinking and stagnation.
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