Tianjin-strong high-pressure pump Co., Ltd. Tianjin-strong high-pressure pump Co., Ltd. is a company specializing in manufacturing and services by the development, production, sales, consisting of steps. Technical force, with high-quality development and design of imports anchoring Jet rig, first-class management, advanced production equipment, complete automated testing system to ensure quality of products, to provide users with high-quality products and quality service. High pressure jet grouting method for handling mud, muddy clay, clay soil, silt, loess, sand, artificial fill and other foundations. When the large particle size boulders contain more, hard clay soil, a large number of plant roots or excessive use organic matter, it should determine the extent of its use according to the results of the field test. Waterjet ground-breaking mechanism 3.1 Factors affect ground-breaking effect of the water jet. When water vapor coaxial injection, high-pressure water jet breaking effect of the soil and the water jet outlet pressure, ejection speed, nozzle diameter, the nozzle shape and other factors; and air jet velocity, flow direction and the size and other factors; and be crushed density of soil, particle size and size distribution, shear strength and other factors. As the injection pressure increases, the effective spray distance increases, but the flow of the jet stream has a greater impact on the water jet pressure. Water jet exit velocity increased energy carried increased ground-breaking effect increased. Air velocity of the jet, the smaller the rate of decay of high pressure water jet, air jet flow increases, the proliferation of the water jet is reduced, increasing the effective distance jet, can achieve better ground-breaking results, thus increasing the diameter of the pile. 3.2 waterjet damaging effects on soil. Waterjet ground-breaking effect Hydraulic Anchor Rig model, with the physical and mechanical properties of the soil medium varies. Anchorage when the injection initially rig, damaged the soil in three-pressed state water jet impingement point tables, soil by water jet punching dented deformation. JET surface and in the soil, it will generate two forces: one from the nozzle close at JET in which the plot is small, the pressure is much greater than the weight of soil stress, and thus in the soil to produce less of a shear force; one in the more distant from the nozzle, the jet pressure can not destroy the soil occurred, but can be compacted soil and squeeze the liquid portion of the jet in the soil, resulting in a squeezing pressure in the soil. For non-cohesive soil, infiltration dominant; for cohesive soils, compaction play a major role. When the water jet is moved into between soil particles, soil after being cut and destroyed. Due to the unevenness of the soil, water jet generating first into the large pores lateral squeezing pressure single-tube anchor rig offer to crack boundary chunk of soil is washed down, tumbling to less pressure at the jet stopped. Therefore, where the jet pressure is small clods will not damage occurs because of this is the existence of massive soil injection pile body.