环形开挖预留核心土法在杨柳垭隧道洞挖中的应用  

Application of Ring Excavation with Core Soil Reserved Method in Excavation of Yangliuya Tunnel

作　　者：杨瑞英 田艳军 YANG Ruiying;TIAN Yanjun(Third Branch of Sinohydro Bureau 10 Co., LTD, Chengdu, Sichuan, 610072)

机构地区：[1]中国水利水电第十工程局有限公司三分局

出　　处：《四川水力发电》2019年第5期90-94,共5页Sichuan Hydropower

摘　　要：大断面软弱围岩采用普通台阶法开挖若支护不及时拱部容易出现垮塌现象,从而导致施工进度缓慢,质量和安全难以得到保障。因此,隧道开挖施工必须采取合理的施工方法对质量、安全、进度进行控制。以杨柳垭隧道工程为例,介绍了大断面软弱围岩采用环形开挖预留核心土法的施工工艺、施工参数以及施工措施,有效地对隧道开挖各个环节进行控制,取得了较好的效果。If the support is not timely during large section weak surrounding rock excavation when applying normal bench cut method, the arch will collapse easily, which leads to slow of construction progress and difficult to guarantee quality and safety. Therefore, reasonable construction methods must be adopted to control the quality, safety and progress of tunnel excavation. Taking Yangliuya Tunnel Project as an example, this paper introduces the construction technology, construction parameters and construction measures of ring excavation with core soil reserved method for large section weak surrounding rock excavation, which effectively controls all processes of tunnel excavation and achieves good results.

关 键 词：大断面隧道 环形开挖 预留核心土法 杨柳垭隧道 

分 类 号：TU941[建筑科学—建筑技术科学] TU745.3