浅埋暗挖隧道管棚支护参数的研究及应用  

Parameters for Pipe Roof Support of Shallow Bored Tunnels

作　　者：曾润忠[1] 詹涛 杨成忠[1] 

机构地区：[1]华东交通大学土木建筑学院,南昌330013 [2]南昌轨道交通集团有限公司,南昌330006

出　　处：《现代隧道技术》2018年第1期210-215,共6页Modern Tunnelling Technology

基　　金：江西省科技支撑计划重点项目(20141BBE50032)

摘　　要：文章以某下穿浅埋暗挖隧道管棚超前加固为研究对象,分析了管棚支护参数的应用理论,采用刚度折算模型,将管棚层折算为各向同性的加固体,并对单层及双层管棚的超前加固效果进行了数值模拟计算,并与监测数据进行了对比分析,在此基础上对不同直径管棚的加固效果进行了分析。分析结果表明:对于常用管棚,随着管棚直径的加大,初期支护及临时支撑的内力有明显减小,并能更好地减小地表的沉降。Based on the pipe roof advance support of a certain shallow bored tunnel, the application theory of pipe roof parameters is analyzed. Using a stiffness reduction model, the pipe roof layer is converted into an isotropic reinforcement body, a numerical simulation is conducted for the effects of single-and double-layer pipe roof advance reinforcement, and a comparison with monitoring data is carried out. An analysis of the reinforcement effects of a pipe roof with different diameters is undertaken. The results show that the internal force of the initial support and temporary support decrease with an increase of the pipe roof diameter, and surface setdement therefore decreases.

关 键 词：浅埋暗挖 隧道工程 管棚支护 支护参数 加固效果 数值模拟 

分 类 号：U455.49[建筑科学—桥梁与隧道工程]