Research on large deformation control technology of highly weathered carbonaceous slate tunnel

IF 5.8 4区工程技术 Q1 MECHANICS

Applied Rheology Pub Date : 2023-01-01 DOI:10.1515/arh-2022-0152

G. Cui, Qinlong Chen

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Abstract

Abstract In order to further explore the large deformation control technology of high ground stress soft rock tunnel, this study takes the highly weathered carbonaceous shale section of Muzhailing tunnel as the research background, the large deformation control effect of scheme 1 “three-step method” and scheme 2 “pilot tunnel expansion method” are compared and analysed by field test and numerical simulation. The results show that the numerical simulation results are consistent with the field test, and the deformation trend of the tunnel is the same. The maximum deformation of the tunnel occurs at the middle step. From the perspective of tunnel deformation, control effect is reduced by about 10% compared with scheme 1, and the deformation of both schemes does not exceed the reserved deformation (400 mm). From the perspective of construction efficiency, the construction efficiency of scheme 2 is 23.07% lower than that of scheme 1. Taking into account the deformation control effect and construction efficiency, it is recommended that the three-step method should be adopted in the construction of this section, and the research results can provide a reference for the construction of the carbonaceous slate section of the tunnel.

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高风化碳质板岩隧道大变形控制技术研究

摘要为了进一步探索高地应力软岩巷道大变形控制技术，本研究以木寨岭隧道高风化碳质页岩段为研究背景，通过现场试验和数值模拟，对比分析方案1“三步法”和方案2“先导扩洞法”的大变形控制效果。结果表明，数值模拟结果与现场试验结果一致，隧道变形趋势基本一致。隧道的最大变形发生在中间阶段。从隧道变形来看，与方案1相比，控制效果降低约10%，且两方案变形均不超过预留变形量(400mm)。从施工效率来看，方案2的施工效率比方案1低23.07%。综合考虑变形控制效果和施工效率，建议在该断面施工中采用三步法，研究成果可为隧道碳质板岩断面施工提供参考。

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来源期刊

Applied Rheology 物理-力学

CiteScore

3.00

自引率

5.60%

发文量

审稿时长

>12 weeks

期刊介绍： Applied Rheology is a peer-reviewed, open access, electronic journal devoted to the publication in the field of applied rheology. The journal provides the readers with free, instant, and permanent access to all content worldwide; and the authors with extensive promotion of published articles, long-time preservation, language-correction services, no space constraints and immediate publication.