隧道下穿高压管道沉降控制标准分析

Standard analysis of settlement control for tunnel crossing underneath high-pressure pipeline

伴随地铁隧道和高压燃气管道的加速建设,新建地铁隧道工程下穿高压燃气管道的案例也逐渐增多。而我国相关规范只给出了有关高压管道的曲率半径的控制指标,实际工程常以沉降变形作为高压管道的控制指标,而且绝大多数的控制标准缺乏理论依据。本文依据规范规定的弹性敷设管道的曲率半径计算公式以及修正的沉降槽宽度计算公式,从理论上推导出高压管道沉降控制标准计算公式,结合模型分析和实测结果,验证了理论分析结果的可靠性。

Cases of new subway tunnels crossing underneath high-pressure gas pipelines is increasing with the accel- erated construction of metro tunnels and high-pressure gas pipelines. The Chinese specifications only describe the radius of curvature of the high-pressure pipeline control parameters. The settlement deformation has been widely used as control parameters have no sufficient theoretical background. Based on the curvature radius of elastic pipe- line laying standard calculation formula and the modified settlement groove width formula, a settlement control standard calculation formula has been proposed, and combined with the model analysis and measured results, the reliability of the theoretical analysis is verified, which provides a theoretical formula for the reference similar crossing engineering.