Systematic physio-mechanical properties test and analysis, especially analysis of relationship between expansion rate, dry density, water content, and overlying pressure, are carried out.
In accordance with construction acceptance specification, temporary restraint is to apply to the expansion joint on pipeline at pressuretest after pipe installation.
管道安装后进行压力试验时，施工验收规范要求要对管道上的膨胀节进行临时约束。
3
The result of test of plane stability is analyzed as well when the expansion joint bellows are subjected to internal pressure and internal pressure together with compression deformation.