A post-grouting device for prefabricated piles and its technology

Abstract

The invention relates to the technical field of foundation stabilization, in particular to a precast pile post-grouting device and a precast pile post-grouting process. The technical scheme adopted by the invention is that the precast pile post-grouting device comprises a precast pile, a stirrer, a slurry tank, a grouting pump and a grouting hose; a pile body of the precast pile is provided with a prestressed reinforcement, a spiral bar, an upper end plate and a lower end plate. The precast pile post-grouting device is characterized in that grouting holes are also formed in the precast pile, and the precast pile is also provided with grouting pipes, an upper transition pipe and a lower transition plate. Compared with the prior art, the precast pile post-grouting device and the precast pile post-grouting process have the beneficial effects that a construction process of pile tip and pile tip peripheral grouting and the arrangement form of the grouting pipes can be realized on piles with various pile diameters (large diameters and small diameters), various pile types (square piles, round piles, hollow piles and solid piles) and various pile lengths (short piles and long piles), and the problems of a post-grouting construction method of all precast pile types are solved.

Description

technical field [0001] The invention relates to the technical field of foundation reinforcement, in particular to a prefabricated pile post-grouting device and a process thereof. Background technique [0002] Prefabricated piles are building foundation components made in factories or construction sites. They are composed of various materials and forms, such as wooden piles, concrete square piles, prestressed concrete pipe piles, prestressed concrete hollow square piles, steel piles, etc. Pile driving equipment is usually used to drive, press or vibrate the piles into the soil. In civil engineering construction, prefabricated piles are mainly used in two categories: concrete prefabricated piles and steel piles. Concrete prefabricated piles can withstand large loads, are durable and fast in construction. They are one of the widely used pile types, but their construction has a great impact on the surrounding environment. Commonly used concrete solid square piles and prestresse...

AI Technical Summary

Problems solved by technology

The first one is the "sinking method of synchronous grouting static pressure prefabricated piles". To meet the needs of all piles, the increase in the side resistance of prefabricated piles is very limited, and it increases the complexity of the pile sinking process and prolongs the pile sinking cycle. After the pile sinking is completed, the grouting cannot solve the gap at the pile end caused by soil extrusion problem, especially with pile groups, and the pile sinking method is limited to static piles

The second is "post-grouting prestressed pipe pile at the bottom of the pile". This method is a new type of pipe pile with a grouting device, but it is not suitable for all prefabricated piles, and it cannot solve the problem of the soft soil below the bearing layer. The reinforcement of this kind of pile cannot achieve the purpose of overall control of settlement. This kind of pile is difficult to manufacture and popularize.

The third type is "Prestressed Concrete Pipe Pile Enlarged Head Rear Grouting Device", which is a grouting device for the enlarged head of the pipe pile. The disadvantage is that the pipe pile with the enlarged head will affect the frictional resistance of the pile body. , and increase the difficulty of pile sinking

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