While-drilling casing pile side sectional high-pressure grouting system and method

Abstract

The invention discloses a while-drilling casing pile side sectional high-pressure grouting system and method. The grouting system comprises a prestress concrete tube pile, an upper end socket plate, a lower end socket plate, a grouting tube, a reserved tube and a baffle control structure, wherein the upper end socket plate and the lower end socket plate are arranged at the two ends of the prestress concrete tube pile. The upper end socket plate and the adjacent lower end socket plate are connected in a welded mode, and the upper end socket plate and the lower end socket plate are provided with connecting grooves which are formed in the radial direction of the prestress concrete tube pile and stretch out of the outer wall. A plurality of sealing baffles are movably arranged at the circumferential edge of the upper end socket plate. The grouting tube is inserted into the reserved tube. The grouting tube is provided with a grout outlet communicated with the connecting grooves. A plurality of through holes are formed in each of the upper end socket plate and the lower end socket plate. By means of the while-drilling casing pile side sectional high-pressure grouting system and method, high-pressure grouting is achieved, grout can enter peripheral rock and soil more deeply in a seepage or compaction or separation mode, a pile body and the periphery rock and soil are bonded, the friction resistance on the pile side is remarkably increased, and the bearing performance of the while-drilling casing pile is further improved.

Description

technical field [0001] The invention belongs to the technical field of pile foundations in building construction, and in particular relates to a segmented high-pressure grouting system and method for the pile side of a follow-up pipe pile while drilling. Background technique [0002] Prestressed high-strength concrete pipe piles, which are economical, environmentally friendly, high-strength and stable in quality, overcome the shortcomings of high cost of steel piles, lack of corrosion resistance, large amount of raw materials for cast-in-situ piles, and inability to guarantee the quality of piles. Bearer direction development. However, the most widely used hammering method, static pressure method and pre-drilling method in the pile sinking construction of PHC pipe pile foundation cannot meet the requirements of environmental protection, high strength and stable quality due to their technical characteristics, and may easily cause damage to the pile body or environmental pollu...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problem of insufficient pressure during grouting of follow-up pipe piles while drilling, which leads to insufficient play of side friction resistance of pipe piles, the present invention provides a segmented high-pressure grouting system and method for pipe piles while drilling

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