浅谈直埋供热管道基于卸荷拱理论的有效埋深  

Talking about The Effective Buried Depth of Direct-buried Heating Pipeline Based on Unloading Arch Theory

作　　者：王双印 Wang Shuangyin(Xinjiang Petroleum Engineering CO.,LTD.Design Branch)

机构地区：[1]中油(新疆)石油工程有限公司设计分公司

出　　处：《区域供热》2021年第4期143-148,共6页District Heating

摘　　要：直埋供热管道在考虑土壤荷载因素时,国内做法一般取全部土层厚度重量作为管道顶部所受竖向土压力。按照普氏卸荷拱理论,当管道达到一定埋深时,管顶土层将形成卸荷拱,此时管道上部土压力小于全覆土压力。采用普氏理论计算不同管径下供热管道的卸荷拱高度,合理确定供热管道的有效埋深,并作为供热系统设计的考虑因素,其计算结果可以降低管道的摩擦力和轴向应力,提高供热管道系统稳定性。When considering the soil load factor for direct-buried heating pipeline,domestic practices generally take the thickness and weight of the entire soil layer as the vertical earth pressure.According to The Protodyakonov’s unloading arch theory,when the pipe reaches a certain buried depth,unloading arch will be formed in the soil layer on top of the pipe.At this time,the upper earth pressure of the pipe is less than that of the entire covering.Protodyakonov’s theory is used to calculate the unloading arch height of heating pipe under different diameters,so as to determine the effective buried depth of heating pipe reasonably,and take it as a factor for heating system design.The calculation results can reduce the friction force and axial stress of pipelines,and improve the stability of heating pipeline system.

关 键 词：直埋 供热管道 卸荷拱 有效埋深 

分 类 号：TU833.12[建筑科学—供热、供燃气、通风及空调工程]