Diameter rotary jet grouting reliability solidification body (length) by the soil affect appearance was one punch irregular spray jet grouting drilling rig, hard soil consolidation diameter (length) smaller package of jet grouting rig number money, high-pressure jet grouting of integrity, uniformity must be higher than normal static pressure grouting. In addition, consolidation body in excellent (no concrete erosion) environment 2015 New Jet rig, increasing strength, the strength of the rate of increase continued to more than 10 years. Measured increase by 1.5 times and even 10 years later. So Jet rig, so long as no concrete in groundwater erosion and not cold (ie freezing temperature not lower than minus 200C) condition, quality and reliable consolidated body can be used as a permanent foundation and seepage curtain. Strong high-pressure pump Co., Ltd. Tianjin poly tunnel construction, backfilling grout consolidation grouting