Field test study on large deformation control of strongly weathered carbonaceous slate tunnel in high geostress

IF 1 4区工程技术 Q4 ENGINEERING, CIVIL

Proceedings of the Institution of Civil Engineers-Transport Pub Date : 2023-03-01 DOI:10.1680/jtran.23.00001

G. Cui, Yong Xiong, D. Wang

{"title":"Field test study on large deformation control of strongly weathered carbonaceous slate tunnel in high geostress","authors":"G. Cui, Yong Xiong, D. Wang","doi":"10.1680/jtran.23.00001","DOIUrl":null,"url":null,"abstract":"The problems of large deformation often occur in strongly weathered carbonaceous slate tunnels with high geostress. In order to control the large deformation in the process of tunnel construction, the advanced drilling measure and the advanced pilot tunnel measure are proposed and relevant field tests are carried out to verify their results. Compared with conventional support measure, the advanced pilot tunnel measure has better control effect on horizontal convergence and vault settlement, which are reduced by 29.70% and 75.81% respectively. What's more, the advanced drilling measures has more advantages in the control of the maximum of surrounding rock stress and the maximum of steel frame stress, which are reduced by 77.44% and 23.12% respectively. The results show that the large deformation of strongly weathered carbonaceous slate tunnel in high geostress cannot be effectively solved by the conventional support measure, but the two advanced stress control measures can effectively reduce the deformation of the surrounding rock of the tunnel, and decrease the stress of the tunnel steel frame and surrounding rock.","PeriodicalId":49670,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Transport","volume":"25 1","pages":""},"PeriodicalIF":1.0000,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the Institution of Civil Engineers-Transport","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1680/jtran.23.00001","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}

引用次数: 0

Abstract

The problems of large deformation often occur in strongly weathered carbonaceous slate tunnels with high geostress. In order to control the large deformation in the process of tunnel construction, the advanced drilling measure and the advanced pilot tunnel measure are proposed and relevant field tests are carried out to verify their results. Compared with conventional support measure, the advanced pilot tunnel measure has better control effect on horizontal convergence and vault settlement, which are reduced by 29.70% and 75.81% respectively. What's more, the advanced drilling measures has more advantages in the control of the maximum of surrounding rock stress and the maximum of steel frame stress, which are reduced by 77.44% and 23.12% respectively. The results show that the large deformation of strongly weathered carbonaceous slate tunnel in high geostress cannot be effectively solved by the conventional support measure, but the two advanced stress control measures can effectively reduce the deformation of the surrounding rock of the tunnel, and decrease the stress of the tunnel steel frame and surrounding rock.

查看原文本刊更多论文

高地应力条件下强风化碳质板岩隧道大变形控制的现场试验研究

强风化、高地应力的碳质板岩隧道常出现大变形问题。为了控制隧道施工过程中的大变形，提出了超前钻孔措施和超前先导隧道措施，并进行了相关的现场试验验证。与常规支护措施相比，超前导洞措施对水平收敛和拱顶沉降的控制效果较好，分别减少29.70%和75.81%。先进钻孔措施在控制围岩应力最大值和钢框架应力最大值方面更有优势，分别降低了77.44%和23.12%。结果表明:强风化碳质板岩隧道在高地应力条件下的大变形不能通过常规支护措施有效解决，而两种先进的应力控制措施可有效减小隧道围岩变形，降低隧道钢框架和围岩的应力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Proceedings of the Institution of Civil Engineers-Transport 工程技术-工程：土木

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

5 months

期刊介绍： Transport is essential reading for those needing information on civil engineering developments across all areas of transport. This journal covers all aspects of planning, design, construction, maintenance and project management for the movement of goods and people. Specific topics covered include: transport planning and policy, construction of infrastructure projects, traffic management, airports and highway pavement maintenance and performance and the economic and environmental aspects of urban and inter-urban transportation systems.