The company developed a high quality and efficiency of the single-pipe sealing curtain, double and triple tube high voltage rotating drill pipe, drill the series have passed the test of the production site of the harsh environment, the effect of a successful construction. The company Jet rigs and accessories, complete sets of high spray equipment, high-pressure injection pump and accessories, high-spray trolley, double-barreled drill, drill three sets of products, specializing in high-pressure pipe ram service. Gravel piles have what effect? Its role is to: reinforcing soft ground, for improve the bearing capacity and enhance what roadbed stability sealing curtain is to reduce the settlement and differential settlement of the foundation, has an important role. Vibration Gravel Pile, which uses vibration sinking pipe piling machine as the main equipment, is an imitation of compacted sand pile of rubble manufacturing process column. The method commonly used to fill the tube section, can be uniform method extubation extubation, extubation speed is generally not more than 1.5m / min sealing curtain grouting, shrinkage-prone strata, extubation may be due to slow speed. In addition, to avoid neck, broken pile should be appropriate to expand the pile diameter, can be anti-interpolation. It refers to the so-called anti interpolation in extubation pull Jane 0.5-1.0m then sank 0.5 a pile pipe 1.0m, ....... For pile pipe has been pulled out the ground, and the filler is less than the design value can be reused play. Gravel gravel pile hammers construction process and the steps of: 1, machine in place: gravel pile drivers and vibratory hammer spring lift heavy pipes connected, close valve pile tip, aligned pile position; 2, Vibrosinking Tube: Start spring vibrating hammer sink into the earth so immersed tube under the pressure of the spring shock vibration hammer strike force and hoist; 3, into the hole, filling gravel: The process can enhance the immersed tube poured gravel hopper through the hoist; 4, pile extubation: immersed tube to the design requirements for depth, inner Gravel more than one-third of the tube length rotating water - resisting curtain before extubation. Extubation after open gravel pile pile tip end, earlier extubation control vibration 10-15s after extubation, extubation edge vibration side, each pulling 1-1.5m to stop, and so forth when entering the pile of gravel the process can be fully compacted; 5, to be a pile after completion of construction, stone hammers next shift a pile of construction.