燃气管道定向钻穿越弹性敷设管段最小曲率半径  

Minimum Curvature Radius of Gas Pipeline Directional Drilling Crossing Elastic Laying Pipe Section

作　　者：陈赐铭 CHEN Ciming

机构地区：[1]中裕(河南)能源控股有限公司,河南郑州450018

出　　处：《煤气与热力》2025年第3期I0016-I0020,I0033,共6页Gas & Heat

摘　　要：城镇燃气管道水平定向钻穿越工程中,有时穿越管段回拖前布管受障碍物影响需要弹性敷设。弹性敷设管段最小曲率半径主要影响因素为拉应力、弯曲应力以及组合应力,在组合应力校核合格的情况下,使组合应力恰好达到规范要求上限值,可确定弹性敷设管段最小曲率半径。钢管最小屈服强度、外直径对弹性敷设管段最小曲率半径影响较大。弹性敷设管段长度、钢管壁厚、弹性敷设管段与地面间的滑动摩擦系数对最小曲率半径影响较小。基于选取的工程实例,计算得到常用钢管最小曲率半径,范围为93~247 m。In the horizontal directional drilling crossing project of urban gas pipelines,sometimes the pipeline layout needs to be laid elastically due to obstacles before the pipe section is pulled back.The minimum curvature radius of elastic laying pipe sections is mainly affected by tensile stress,bending stress and combined stress.Under the condition of qualified combined stress verification,the minimum curvature radius of elastic laying pipe sections can be determined by making the combined stress exactly reach the upper limit value required by the specifications.The minimum yield strength and outer diameter of steel pipes have a significant impact on the minimum curvature radius of elastic laying pipe sections.The length of the elastic laying pipe section,the thickness of the steel pipe wall,and the sliding friction coefficient between the elastic laying pipe section and the ground have little effect on the minimum curvature radius.Based on the selected engineering example,the minimum curvature radius of commonly used steel pipes is calculated,ranging from 93 to 247 meters.

关 键 词：燃气管道 水平定向钻 布管 弹性敷设 最小曲率半径 

分 类 号：TU996.7[建筑科学—供热、供燃气、通风及空调工程]