Soft Rock Tunnel horizontal jet grouting method: the completion of the pre-prepared aqueous slurry fed to the first type drilling Grouting after the end of the first type of drilling equipment, so as to exit the drill The first type of drilling and drilling along the first type form a first type of pile body from the inside out, completely out of the drill pipe drilling stopped after the first type of horizontal rotary jet grouting level of high pressure jet grouting pile driver, the grouting apparatus is provided in the movable body and located between the first bracket and the second support bracket, said spray boom also include Jet device, said Jet means comprises a drill bit disposed adjacent and rotatable about the longitudinal axis of the spray nozzle and the boom is connected to the rear end of the nozzle jet grouting pile power line, the grouting device through the pipeline slurry delivered to the spin spray nozzle means [Tianjin-strong high-pressure pump Co., Ltd. to recommend the star product - high-pressure pump] high pressure reciprocating pump features: the use of high pressure reciprocating pump pressure should generally be between 10MPa ~ 100MPa. It belongs to the positive displacement pump triple tube Churning Pile picture, with the working chamber cyclical changes in volume to achieve the purpose of transmission fluid; the original motivation of the mechanical energy by pressure feed pump directly into fluid energy; pump capacity depends only on Working chamber volume variation value and the number of changes in the unit time, discharge pressure theoretically irrelevant. Reciprocating pump is by means of a hydraulic cylinder piston reciprocates in the working chamber (or through the diaphragm, bellows and other flexible element in the periodic elastic deformation of the working chamber) to the working chamber volume to generate a periodic change. Structurally, the reciprocating pump working chamber is the use of seals from the outside world, through the valve (suction and discharge valves) and the line of communication or closed.