盾构隧道伴行对高压管线变形的影响分析  

Analysis of Influence of Shield Tunnel Alignment on Deformation of High Pressure Pipeline

作　　者：席培胜 周冠宇 张军 XI Peisheng;ZHOU Guanyu;ZHANG Jun(College of Civil Engineering Anhui Jianzhu University,Hefei 230601,China;Anhui Urban Construction and Underground Space Engineering Technology Research Center,Hefei 230601,China)

机构地区：[1]安徽建筑大学土木工程学院,合肥230601 [2]安徽省城市建设和地下空间工程技术研究中心,合肥230601

出　　处：《四川轻化工大学学报（自然科学版）》2024年第1期79-85,共7页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：安徽省自然科学基金青年项目(2208085QE142);安徽省高等学校自然科学基金重点项目(KJ2019A0742)。

摘　　要：盾构隧道施工不可避免地会造成围岩土体扰动,进而影响地下管线的变形与沉降。当管线内部存在较大压力时,管线的变形控制就显得更加苛刻。以某区间隧道伴行氮气、氧气管线工程为依托,采用数值模拟加实地监测,分析高压管线伴行时盾构掘进对高压管线沉降的影响。结果表明:含高压管线的最大沉降值3.96 mm比无压管线的3.83 mm大4%,都控制在安全范围20 mm内,不会引起管线破裂。而管线与盾构中心线的距离是影响变形和沉降的重要因素。因此在盾构掘进时应当格外关注高压管线的沉降以及受力变形情况,尤其是靠近盾构中心线的高压管线。The construction of a shield tunnel inevitably causes disturbance of surrounding rock and soil,which in turn affect the deformation and settlement of underground pipelines.The greater pressure inside the pipeline is,the more stringent deformation control of the pipeline becomes.Relying on the nitrogen-oxygen pipeline project accompanied by a tunnel in an interval,numerical simulation and field monitoring are used to analyze the impact of shield tunneling on the settlement of high-pressure pipelines accompanying.The results show that the maximum settlement value of 3.96 mm for pipeline containing high pressure is 4%more than that of 3.83 mm for the unpressurised pipeline,which is within the safe range of 20 mm and will not cause pipeline rupture.The distance between the pipeline and the centerline of the shield is an important factor affecting the deformation and settlement.Therefore,special attention should be paid to the settlement and deformation of high-pressure pipelines during shield excavation,especially to the high-pressure pipelines close to the centerline of the shield.

关 键 词：高压管线 双线盾构 管线变形 管线伴行 Plaxis 3D 

分 类 号：TU990.3[建筑科学—市政工程]