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这种工法是以超高压(200kg/cm~2左右)的压力将药液横向喷射在地基内,喷射的药液与土混合而改良地基。这种工法与喷射灌浆法不同的地方是将药液通过单一的管喷射,施工较易,机械设备紧凑,可是喷射药液的器具不简单和理论的喷流状况不同,这种高压喷流的影响半径小,形成直径40cm左右的柱状体。再有地质条件是软弱地基(砂质土N<10)(粘性土N<5)才有可能,超过这以上的坚硬地质条件成孔直径太小,达不到施工要求,施工顺序如图所示,施工机械设备如表1、2所示。
This method is based on the ultra-high pressure (200kg / cm ~ 2 or so) the pressure of liquid sprayed laterally in the foundation, the spray of liquid mixed with soil to improve the foundation. The difference between this method and jet grouting method is that the liquid medicine is sprayed through a single tube, the construction is easy and the mechanical equipment is compact. However, the apparatus for jetting the liquid medicine is not simple and the theoretical jet flow conditions are different. Impact radius is small, forming a columnar body about 40cm in diameter. Further geological conditions are weak foundation (sandy soil N <10) (clay N <5) is it possible, more than the hard geological conditions above the hole diameter is too small to reach the construction requirements, the construction sequence shown in Figure Show, construction machinery and equipment shown in Table 1,2.