[Tianjin-strong high-pressure pump Co., Ltd. to recommend the star product] quality control due to the high pressure spraying pile construction difficult, according to the engineering construction rules formulated in strict compliance with anchor construction jet grouting rig manufacturers, in order to ensure the construction quality. 1. The cement should be product certification and product quality certification documents can be used. 2. Churning Pile strength must meet the design requirements. 3. Surveying: Construction axis tolerance of 1cm. Measuring ground elevation aperture to allow deviation of less than 1cm double pipe jet grouting anchor rig, given hole tolerance of no more than 2cm. Aligned with the central axis of the drill hole to allow deviation does not exceed 2cm. [Tianjin-strong high-pressure pump Co., Ltd. to recommend the star product] What is double-tube method? Double tube method is to use a double grouting pipe dual channel. After two heavy drilling grouting pipe to a predetermined depth of soil anchoring Jet rig, through a coaxial bottom of the tube side of the double nozzles while spraying a jet of high-pressure slurry and air attack destroyed two medium soil. That high-pressure mud pump high-pressure generating device is ejected slurry 20KPa about triple tube anchoring Jet rig, from high-speed spray nozzle, and use about 0.7KPa pressure compressed air is ejected from the outer nozzle. High pressure in the joint action of the slurry and its outer airflow, energy destroy the soil increases significantly, the final form of the larger consolidated body in the soil.