铁路隧道近接工程变形控制标准梳理及工程防护措施研究OA北大核心

As the strategy for building China's strength in transportation continues to advance,people's demand for the quality of travel is increasing.Rail transit has become the lifeline for high-quality development in urbanization.Especially for intercity railways,suburban railways,and metros,which are mainly built through urban areas and are mostly laid underground,resulting in numerous urban tunnels.Due to the complex urban environment,tunnels inevitably pass above,below,or alongside existing buildings and structures such as railways,metros,highways,main urban roads,and high-rise buildings(hereinafter referred to as close-spaced engineering).How to ensure the normal operation and safety of close-spaced engineering during tunnel construction,as well as how to reasonably determine the deformation control standards for close-spaced engineering,are the focus,difficulty,and control points of urban tunnel construction.This article categorizes by adjacent railway,highway,urban rail transit,and underground pipelines,systematically sorts out the standards of related industries,and proposes protection ranges and requirements for tunnels in different environments,deformation control standards for close-spaced engineering construction.Based on the control standards and engineering experience,a set of design and construction control measures for close-spaced engineering are proposed:During the survey phase,it is necessary to ascertain the surrounding environment and geological conditions.During the design phase,on the basis of reasonably designing the route scheme and keeping enough safe clearance,adopt reasonable construction methods and reliable supporting structures,and set up effective isolation,protection,and reinforcement measures.During the construction phase,strengthen tunnel geological prediction and monitoring,and establish perfect contingency plans.