港珠澳大桥供水管道伸缩补偿方案研究与应用

Research and Application of Expansion Compensation Scheme for Water Supply Pipeline of Hong Kong-Zhuhai-Macao Bridge

为了保证管道施工安装后,在使用过程中能有效的进行伸缩补偿处理,避免由于环境因素而引起的热胀冷缩或管道整体移动时造成损坏情况。港珠澳大桥交通工程通过现场检查、核算、分析,在整个项目采用集中式和分散式两种方法对桥梁段及隧道段供水管道进行伸缩补偿[1]。通过现场实践表明:集中式对起伸缩功能的构件安装要求高,难度较大,但伸缩补偿范围广,能有效的满足伸缩补偿功能[2];分散式对单个构件的伸缩范围要求不高,通过整体管道的伸缩补偿要求,计算出构件的安装数量及间距,便于实现。

In order to ensure the effectively expansion compensation processing of the pipeline in service after installation,and avoid the thermal expansion and contraction caused by environmental factors or the damage caused by overall movement of the pipeline, through on-site inspection, accounting and analysis, the expansion compensation of water supply pipeline in the bridge section and the tunnel section of the Hong Kong-Zhuhai-Macao Bridge is carried out in the whole project by centralized and dispersive methods. The field practice shows that(1) the requirement for centralized method for the installation of the expansion components is high,it is difficult,but the scope of expansion compensation is wide,which can effectively meet the expansion compensation function;(2) the requirement for the expansion range of single component is not high,through the expansion compensation requirement of the whole pipeline,the number and spacing of the components are calculated for easily realization.