First, the technical performance Grouting technology is a traditional and effective underground engineering reinforcement construction method, even if it is relatively new, advanced "freezing method", but also in the local need to combine grouting reinforcement. At present, more equipment is used in grouting construction. The rated pressure is about 1.5 ~ 2MPa and the flow rate is 0.4 ~ 3m3 / h. The UB8 mortar pump developed in our hospital during the Ninth Five-Year Plan period has high pressure , The delivery of large and uniform flow, can transport a certain amount of sand slurry, the need to maintain the work less frequently, with superior performance, the construction of hydraulic projects in the construction of much favor, after a lot of practice has proved that the product The following reliable performance indicators can be achieved: Rated pressure: 6MPa (design pressure 8Mpa) Rated flow: 8m3 / h Horizontal conveying distance: 300m (mortar) Second, the structure introduced by the motor drive through a reducer with a specific trajectory of the cam rotation, Push the piston forward. Pistons in the return cylinder and valve chamber relative to form a vacuum, the slurry from the hopper through the suction tube into the lower valve chamber and the cylinder. As the piston moves forward, the pressure in the working cylinder and the valve chamber increases. The piston cylinder pushes the mortar in the working cylinder and the valve chamber out of the upper valve chamber. In this way, the mortar is continuously pumped out continuously. Third, the construction method grouting method There are two kinds of pure pressure grouting and circulating grouting. General soil grouting large amount of suction slurry, the use of pure pressure grouting; fractured rock mass suction small, the use of circulating grouting. According to the grouting material, it can be divided into single grouting and double grouting. Two-fluid gel time is longer, both in the tank after mixing with a single pump injection, known as single gun injection. Gel time is medium (2 ~ 5min), double-liquid pump in the hole after the injection of mixed, known as the injection of 1.5 guns; gel time is short, the double pump with double pump into the bottom of the hole after the injection, said For two guns injection. Single shot grouting and double grouting in the injection of a single shot with a mortar pump (hereinafter referred to as single-pump grouting), two-shot grouting injection 1.5 shots and two shots are required two mortar pump (hereinafter referred to as Double pump grouting). The actual construction of the soil and grouting materials according to different installation and configuration of equipment, there are four possible grouting combination configuration, namely: single-pump pure pressure grouting, single-pump circulating grouting, double-pump pure pressure injection Pulp, double pump circulating grouting. After grouting, the equipment must be cleaned immediately to prevent the equipment from condensing in the equipment. Mortar pump flow through the - valve adjustment to meet the slurry ratio design requirements.
