江西建材Issue(12)：299-301,3.
高速公路隧道S-Ⅲ级围岩上下台阶法开挖施工技术研究
Study on Excavation Technology of Up and Down Steps of S-Ⅲ Surrounding Rock
彭培伟1
作者信息
- 1. 中铁十七局集团有限公司,山西 太原 030000
- 折叠
摘要
Abstract
This paper studies the excavation technology of the S-Ⅲ surrounding rock of the expressway tunnel.C32 concrete is used to protect the rock,and the lock section is strengthened by pre-grouting in small pipe shed.The drilling and blasting operation is used to ensure the normal excavation outline,and the small catheter is installed to rationally grouting the surrounding rock to achieve advance reinforcement.Use the up and down step method for excavation,and take the corresponding support measures to complete the construction.The test results show that the recovery value of the rock specimens at the section is within 45;the settlement of the three test points is below 20 mm and the expectation of the surrounding rock deformation can be effectively controlled to achieve good construction effect.关键词
高速公路隧道/围岩/上下台阶法/开挖Key words
Highway tunnel/Surrounding rock/Up and down step method/Excavation分类
交通工程引用本文复制引用
彭培伟..高速公路隧道S-Ⅲ级围岩上下台阶法开挖施工技术研究[J].江西建材,2023,(12):299-301,3.
