小导管预支护作用机理与效果分析  

Study on Mechanism and Effect of Small Duct Presupporting Technology

作　　者：范永慧 戴俊[2] 李岳[2] 

机构地区：[1]中交远洲交通科技集团有限公司,石家庄050051 [2]西安科技大学建筑与土木工程学院,西安710054

出　　处：《工业安全与环保》2012年第9期79-82,共4页Industrial Safety and Environmental Protection

摘　　要：小导管预支护是隧道施工中常用的一种超前支护技术。对小导管预支护加固机理和作用效应进行分析,通过建立预支护系统的串、并联模型,明确了小导管预支护各单元间的相互关系,采用FLAC三维数值模拟方法对小导管预支护效果进行分析,通过比较不同工况对拱顶竖向位移的影响,表明小导管注浆预支护在控制拱顶沉降、维持围岩稳定上发挥了重要作用。The small duct pre-supporting technology is one of the advanced support patterns in tunnel engineering construction.This paper analyzes the reinforcement mechanism and action effect of small duct pre-supporting and clarifies the interrelationship among various small duct pre-supporting units by building the serial parallel connection model of pre-supporting system.Then by the three-dimensional numerical simulation of FLAC method,the support effect of small duct pre-supporting is presented.Finally by comparing the impact on vertical displacement of vault under different working conditions,it illustrates that small duct grouting support plays an important role in controlling vault settlement and maintaining the stability of surrounding rock.

关 键 词：隧道 小导管 预支护效果 

分 类 号：U455.7[建筑科学—桥梁与隧道工程]