地铁盾构隧道下穿高压LNG(液化天燃气)管线距离要求及沉降控制标准探讨

Discussion on Distance Requirement and Settlement Control Standard of Metro Shield Tunnel Crossing Underneath High-pressure Liquefied Natural Gas( LNG) Pipeline

随着城市地铁及城镇高压液化燃气管线建设规模及范围的不断扩大,新建地铁隧道下穿高压LNG管线的案例越来越多,而目前国家和地方相关规范、规定对下穿高压LNG管线距离要求及变形控制标准存在不统一的情况。本文通过对规范的梳理、理论计算和案例分析等方法,总结了地铁盾构隧道下穿高压LNG管线距离要求及与实际施工水平相符的沉降控制标准计算公式,可为相关方案的制定提供理论依据。

The Metro tunnel crossing underneath high-pressure liquefied natural gas（ LNG） pipelines becomes common as the development of Metro and high-pressure LNG pipelines. The distance requirement and settlement control standard of Metro shield tunnel crossing underneath high-pressure LNG pipeline in China are not so well developed. The distance requirements and settlement control standard calculation formula of Metro shield tunnel crossing underneath high-pressure LNG pipeline are summarized and analyzed by means of theoretical calculation and case studies. The study results can provide reference for determining related requirements.