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引松供水工程岩溶及软弱破碎地层敞开式TBM施工技术
收稿日期: 2016-08-04
修回日期: 2016-11-11
网络出版日期: 2017-03-04
Construction Technologies for Open TBM Used in Karst Areas and Softweak and Broken Grounds: Case Study of Songhua River Water Diversion Project
Received date: 2016-08-04
Revised date: 2016-11-11
Online published: 2017-03-04
引松供水工程四标段隧洞TBM法施工长度约17 km，其中7 332 m主要穿越灰岩（岩溶）、炭质板岩、断层等软弱破碎地层。为解决TBM在该类地层中掘进时TBM偏机、栽头、刀盘被糊、被卡、涌泥涌水、收敛变形引起设备被卡等难题，通过资料查阅、调研国内外现有TBM施工案例、专家咨询研讨等，对比研究多种方案；结合工程实践，提出TBM超前地质预报、钢拱架、钢筋排和喷射混凝土联合及时支护等一系列确保TBM连续施工的方案与措施。经工程验证，该方案与措施能够很好地保证TBM在岩溶及软弱破碎地层的连续掘进，为工程的顺利实施奠定了坚实的基础。本文研究得出了一系列理论及参数，可为类似工程提供借鉴和参考。
孙振川 , 陈建立 . 引松供水工程岩溶及软弱破碎地层敞开式TBM施工技术[J]. 隧道建设, 2017 , 37(2) : 215 -222 . DOI: 10.3973/j.issn.1672-741X.2017.02.014
The tunnel of No. 4 Bid Section of Songhua River Water Diversion Project bored by TBM is about 17 km; and there are total 7 332 m crosses softweak and broken areas; i.e. limestone (karst), carbonaceous slate and fracture. The TBM often deviates, pitches and jammed when boring in the abovementioned areas. In this paper, the TBM construction cases, related expert consultations and construction schemes are analyzed and studied; and then a series of countermeasures for TBM continuous construction, i.e. advanced geological prediction and support scheme of steel arch frame + rebar row + shotcreting, are proposed. The practice shows that the abovementioned technologies are feasible and rational and can guarantee the TBM continuous construction in karst areas and softweak and broken grounds.
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