软弱围岩大断面隧道开挖及加固方法

作者：张恩正

单位：重庆工程职业技术学院，重庆 402260

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中文摘要：随着我国交通及城市地下空间开发的快速发展，大断面隧道的建设需求日益增加。软弱围岩因其强度低、自稳能力差、 易变形等特点，在隧道开挖过程中极易引发围岩失稳、支护结构破坏等问题，严重影响施工安全和工程进度。综述了软弱 围岩大断面隧道开挖方法，对比分析了双侧壁导坑法（CRD 法）、中隔壁法（CD 法）和交叉中隔壁法（CRD 法）三种开 挖方法，并提出了加固围岩的措施建议。

中文关键词：软弱围岩；大断面；隧道开挖

英文摘要：With the rapid development of transportation and urban underground space development in China， the demand for the construction of large section tunnels is increasing day by day. Due to its low strength，poor selfstabilization ability，and easy deformation，weak surrounding rock is prone to instability and damage to supporting structures during tunnel excavation，seriously affecting construction safety and project progress. This article summarizes the excavation methods for large section tunnels in weak surrounding rock，compares and analyzes three excavation methods：the Double Sided Wall Pilot Pit Method，the Central Division Method，and the Cross Middle Partition Wall Method，and proposes measures and suggestions for reinforcing the surrounding rock.

英文关键词：Weak surrounding rock；Large cross-section；Tunnel excavation