水压试验时,对管道两端的盖堵产生压力,一般都用方术、钢板、千斤顶等支撑,管径愈大,压力也愈大,甚至必须打桩作斜撑支柱(浇筑混凝土临时挡土墙虽然比土靠背坚固,但是后拆除麻烦)。这些方法均以土为靠背,都是为了尽量减少靠背土的压缩,并增加其稳定性。在试压过程中,支撑物及靠背土都不允许发生松动,故称“静支撑法”。 In the hydrostatic test, pressure is applied to the plugs at both ends of the pipeline, which are usually supported by alchemy, steel plates, jacks, etc. The larger the diameter, the greater the pressure, and it is even necessary to piling for the bracing struts (temporary concrete retaining wall) Stronger than soil back, but later removed troublesome). These methods all use soil as a backrest to minimize the backrest soil compression and increase its stability. During the pressure testing process, the support and backrest soil are not allowed to loosen, so it is called “static support method.”