漠大管道在沿线多年冻土区的位移监测

Displacement monitoring of Mohe-Daqing Oil Pipeline in the permafrost area

针对漠大管道在沿线多年冻土区面临的冻胀融沉灾害,提出了基于全站仪测量的管道位移监测技术。详细介绍了管道位移监测原理,设计了基准桩和标志桩结构,采取了3项措施保证基准桩的稳定。在漠大管道漠河首站-加格达奇泵站区间,选取了9个高风险区,安装了62套管道位移监测装置。2010年11月9日管道投产前采集了初始数据,2010年12月-2011年6月完成了5次数据采集,对监测数据进行分析发现:监测段管道未受到冻胀灾害的影响,部分监测段管道受到融沉灾害的影响。验证了该技术的可行性和有效性。

In allusion to the frost heaving and thaw collapse disasters of the Mohe-Daqing Oil Pipeline in the permafrost area, total station surveying-based pipeline displacement monitoring technology is proposed. Pipeline displacement monitoring principle is detailed, and structure of recovery pegs and monument and 3 measures are taken to guarantee stability of the recovery pegs. Nine high-risk areas are selected and 62 pipeline displacement monitoring devices are installed from Mohe Initial Station to Jiagedaqi Pump Station in Mohe–Daqing Oil Pipeline. Initial data were acquired before the pipeline being put into operation in November 9, 2010 and data were acquired 5 times from December 2010 to June 2011. It can be found through analysis of monitoring data that the pipeline in the monitoring section is not subject to frost heaving but part of the pipeline in the monitoring section is subject to thaw collapse disasters. The feasibility and effectiveness of the technology have been verified by application practices.