摘要
与CJJ/T 81—98《城镇直埋供热管道工程技术规程》相比,CJJ/T 81—2013《城镇供热直埋热水管道技术规程》在计算土壤与保温管之间单位长度摩擦力(以下简称单位长度摩擦力)时,考虑了地下水位的影响。介绍CJJ/T 81—2013《城镇供热直埋热水管道技术规程》中单位长度摩擦力的计算方法。分析地下水位对敞沟分段预热安装的预热段长度、覆土预热安装的一次性补偿器间距、分支处热位移设计计算的影响。
Compared with the Technical Specifi- cation for Directly Buried Heating Pipeline Engineering in City( CJJ/T 81 -98), the Technical Specification for Directly Buried Hot-water Heating Pipeline in City (CJJ/T 81 -2013) considers the influence of groundwater level when the unit length friction force between soil and insulation pipe (hereinafter referred to as unit length friction) is calculated. The method of calculating the unit length friction force between soil and insulating pipe in the Technical Specification for Directly Buried Hot-water Heating Pipeline in City( CJJ/T 81 - 2013) is introduced. The influence of the underground water level on the preheating section length for the sectional preheating installation in open trench, the onetime compensator spacing of preheating installation of covering soil and the calculation of the thermal displacement at the branch is analyzed.
出处
《煤气与热力》
2018年第8期4-6,共3页
Gas & Heat
关键词
地下水位
直埋供热管道
单位长度摩擦力
underground water level
directly buried heating pipeline
unit length friction force