Study on the Construction Technology of Shield-Driven Shaft Inserted by Shallow-Buried Subway over Urban Comprehensive Tunnel
The construction of tube gallery interspersed with subway,such as demolition project,foundation pit support and structure safety,is difficult and complicated,and the requirements for construction quality are extremely high.This paper is based on the reconstruction section of the comprehensive pipe corridor of the new city in the south of Nanjing,it is analyzed that there are many kinds of interference in the tube gallery,such as over-span shallow subway,demolishing part of shield tunnel,uneven bearing capacity of foundation,adjacent road and foundation pit of building.In the case of complicated surrounding engineering structure and limited working space,the foundation pit support should be improved by making full use of some shield wells in the original subway,and the structural form should be optimized to avoid structural conflicts,the safety quality and progress of subway engineering,road engineering,building engineering and pipe gallery engineering are ensured by adopting the measures of soft and hard foundation treatment.In order to meet the technical requirements of different types of projects and optimize the construction design as far as possible,this paper provides effective solutions for similar underground projects,which can be used for reference.
utility tunnelfoundation pit safetyshallow-buried subwaydemolition of shield wells
NETL
NSTL
万方数据
