我们经过改进压水试验方法,大大缩短了试验时间,现在丹江队作10公尺的试段只用8小时左右,305机最近作10公尺试段只用3小时,主要的体会有如下几点: 1.万不可将孔打完从下而上压水。1956年10月因无压水试验设备,先打完孔,等压水试验设备来到,从下而上压水时,每段压完都需回填水泥或泥球,把压过的试段封固,而水泥在孔内不易沉淀,沙子和水泥分家,沙子早沉到孔底,而水泥则漂在水位以上,这样水泥和沙子凝固时时过长且质量不好,用泥球倒实地费时较长。一个70公尺的孔压水试验(主要是逐段封孔)进行了一个多月,大大影响生产效率,后来接受教训,从上而下鑽一段压一段水,最后一次封孔才缩短了时间。 2.过去大都采取双管压水法,好处是压力较大,容易堵塞,但上下工作管费时较长而麻烦,堵塞不住时即用綵(木贡)盲目加压,把胶球压坏经常返工。后采取单管顶压式压水法,操作简便,比双管 We have improved water pressure test methods, greatly reducing the test time, and now Danjiang team for 10-meter pilot section only about 8 hours, 305 machine for the recent 10-meter pilot section only 3 hours, the main experience is as follows A few points: 1. Never hit the bottom of the hole from the pressure of water. October 1956 due to no pressure water test equipment, first hit the hole, pressure and other water testing equipment came, from the bottom of the pressure of water, each end of the pressure required to be backfilled cement or mud ball, the pressure test section And the cement in the hole is not easy to sediment, sand and cement separation, the sand early sink to the bottom of the hole, and the cement is drifting above the water level, so that cement and sand solidification from time to time and the quality is not good, mud ball down to earth It takes a long time. A 70-meter hole water pressure test (mainly by hole sealing section) for more than a month, greatly affecting the production efficiency, and later learned a lesson, from top to bottom pressure of a period of water, the last sealing shorten the time . 2. In the past to take double tube pressure water law, the advantage is more pressure, easy to plug, but up and down the work of the tube longer and troublesome, when the plug can not use color (Mugong) blindly pressure, the ball crushed Often rework. After the pressure to take a single tube pressure method, easy to operate, more than double pipe