双隧道诱发滑坡蠕滑阶段的治理措施:个案研究

IF 2 4区工程技术 Q3 ENGINEERING, GEOLOGICAL

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering Pub Date : 2023-09-14 DOI:10.1680/jgeen.22.00239

Junru Zhang, Jianchi Ma, Kaimeng Ma, Yumei Tan, Zhijian Yan, Jimeng Feng

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引用次数: 0

摘要

在地质条件复杂的地区进行隧道开挖，会导致边坡失稳，进而引发山体滑坡，对隧道衬砌的完整性构成严重威胁。针对这一问题，以韶关-新丰高速公路汉山口隧道为研究对象，采用有限差分法对隧道-滑坡系统的稳定性进行了研究。采用平面应变模型考察各种处理措施对系统的影响，采用强度折减(增量)法确定不同处理措施适用的边坡初始安全系数范围，以最大剪切应变增量为准则。“抗滑桩+锚框架梁”加固体系是最有效的解决方案，实施后日变形减少60.1%。结果表明，桩锚加固体系对滑坡蠕变具有明显的缓解作用，并可根据不同条件下的边坡临界安全系数对相应的治理措施进行分类。

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Treatment measures for the creep-slip phase of landslides induced by twin tunnels: a case study

Tunnel excavation in geologically challenging areas can lead to slope instability and consequent landslides, which pose a serious threat to the integrity of the tunnel lining. To address this issue, a study was conducted to investigate the stability of the tunnel-landslide system using the finite difference method (FDM) based on the Hanshankou Tunnel of the Shaoguan-Xinfeng Expressway. A plane strain model was used to examine the effect of various treatment measures on the system, and the strength reduction (incremental) method was employed to determine the range of initial slope safety factors applicable to different treatment measures, with the maximum shear strain increment serving as the criterion. The ‘anti-slip pile + anchor frame beam’ reinforcement system was found to be the most effective solution, reducing daily deformation by 60.1% after implementation. The results indicated that the pile-anchor reinforcement system can significantly mitigate landslide creep, and the corresponding treatment measures can be categorized based on the critical slope safety factor under different conditions.

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来源期刊

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering 工程技术-地球科学综合

CiteScore

4.40

自引率

4.50%

发文量

审稿时长

3 months

期刊介绍： Geotechnical Engineering provides a forum for the publication of high quality, topical and relevant technical papers covering all aspects of geotechnical research, design, construction and performance. The journal aims to be of interest to those civil, structural or geotechnical engineering practitioners wishing to develop a greater understanding of the influence of geotechnics on the built environment.