中俄原油输运管道工程冻土区管壁厚度确定  

Determination of the Wall Thickness for Designing the Steel Pipe in Frozen Ground along the China-Russia Crude Oil Pipeline Route

作　　者：李勇浩[1] 吴伟[1] 郝加前[1] 温智[2] 

机构地区：[1]大庆油田工程有限公司,黑龙江大庆163712 [2]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000

出　　处：《冰川冻土》2008年第4期605-609,共5页Journal of Glaciology and Geocryology

基　　金：中国科学院知识创新工程重要方向项目“冻土区输油管道基础冻融灾害形成机制和防治技术”(KZCX2-YW-311);中国石油天然气股份有限公司技术开发项目“多年冻土地区埋设管道热、应力分析及数值模拟”资助

摘　　要：拟建中俄原油管线由漠河进入中国,经过大兴安岭多年冻土区、嫩江平原深季节冻土区至大庆.原油输运过程中由于管道与周围土体之间发生的热交换,使得原有土层中的热交换机制被打破,冻土区常温原油管道工程基础将面临融沉和冻胀灾害的双重挑战.采用理论分析和数值模拟相结合的研究方法,计算校核了原油管道的应力状况和安全性,并对遭受冻胀变形作用的管道受力状况进行了有限元数值分析,提出了壁厚的设计参数和选取原则.对于采用X65钢级螺旋缝埋弧焊钢管和直缝埋弧焊钢管的中俄原油管道工程,当管道设计压力为10 MPa时,中俄原油管道设计壁厚应不小于14.2mm.为了使管道能适应冻胀率更大的情形,管道壁厚应适当加大.The proposed China-Russia Crude Oil Pipeline enters into China at Mohe, and crosses the permafrost regions in the Da Hinggan Mountains and the seasonally-frozen-ground regions on the northern Nenjiang River Plain. The thermal regime of soils along the pipeline route will be severely disturbed due to the heat exchange between the oil flowing in the pipeline and the ambient soils. Therefore, the oil pipeline will suffer from the frost heaving and thaw settlement. Base a combination of theoretical analysis and numerical simulation, the possible stress state of the oil pipeline was analyzed and predicted, and the safety of oilpipeline was presented. Besides, the stress state of oil pipiline suffered from the frost heaving hazard was predicted by finite element numercial simulation. When the design pressure is 10 MPa, the pipe wall thickness should be no less than 14. 2 mm. However, the wall thickness could be thickened, up to 16 mm, in order to cost-effectively mitigate the significant frost hazards resulting from the frost heaving and thaw settlement of pipeline foundation soils.

关 键 词：中俄原油管道 壁厚 冻胀 

分 类 号：U173[交通运输工程]