莲塘隧道超大断面分岔处设计参数拟定

Design Parameters Setting of Forked Liantang Tunnel with Super-large Cross Section

为了拟定深圳市东部过境高速公路工程莲塘隧道分岔段形式及超大断面设计参数,对国内已建和在建的超大断面分岔隧道进行现场调研。搜集整理这些工程的项目概况、建设条件、设计参数以及施工方法等资料。结合莲塘隧道的实际工程条件,采用工程类比的方法,初步拟定分岔段形式及超大断面设计参数。建议莲塘隧道分岔段形式为:超大断面段-连拱段-小净距段-分离段。莲塘隧道的分岔段布置形式及施工方法、断面尺寸、支护参数的拟定为今后隧道超大断面设计提供参考和依据。

In order to determine the form of the bifurcation section of the Liantang Tunnel at Shenzhen Eastern Transit Expressway and their design parameters of the super-large cross section,a field investigation survey was conducted on the super-large cross-section forked tunnels that have been built and are under construction in China.All information including project profiles,construction conditions,design parameters,and construction methods have been collected and summarized.Combining with the actual site engineering conditions of the Liantang Tunnel,the engineering analogy method was used to preliminarily determine the form of the bifurcation section and the design parameters of this super-large section.It is suggested that the form of the bifurcation section of the Liantang Tunnel be:super-large section,multi-arch section,small clearance section and separation section.This study of the bifurcation section layout of the Liantang Tunnel,construction method,and setting of section size and construction support parameters is able to provide references and basis for the design of the super-large section tunnels in the future.