Plug hole type decompression drainage pipe pile and its preparation process

Abstract

The invention provides a plug hole type pressure-reducing and draining tube pile. The tube pile comprises a tube pile body and a pile cap, wherein at least a row of plug holes axially distributed along the tube pile body are formed on the tube pile body; plugs are arranged in the plug holes; and traction ropes are connected at the ends, which are positioned on the inner wall of the tube pile body, of the plugs and extend to the top of the tube pile body in a tube of the tube pile body. A preparation process comprises the following steps of: reserving through hollow holes as the plug holes around a formwork, welding steel rods around the through hollow holes, and then manufacturing the plugs; and placing a reinforcement cage in the formwork, inserting the plugs into the reserved hollow holes on the formwork to push against an inner formwork and be exposed out of the formwork, pulling out the traction ropes from the inner formwork of the tube pile along the pile body, then binding the plugs on the formwork with steel wires and placing concrete, carrying out prestress tensioning and centrifugal shaping after film combination, then carrying out autoclave curing, shearing off the steelwires binding the formwork after the strength is achieved, releasing the mould by using a release agent, flattening the plugs exposed out of the pile body along the pile body, and welding the pile cap.

Description

Technical field [0001] The process relates to a pipe pile that considers the pipe pile plug hole and uses a plug for decompression and drainage and a preparation process. Background technique [0002] In the foundation design and construction, the precast reinforced concrete pipe pile has the characteristics of high single pile bearing capacity, fast construction speed, short construction period, easy control and assurance of project quality, and low cost. However, prefabricated reinforced concrete pipe piles are soil-squeezing piles. During the construction process, the piles need to be drained out of the same volume of soil, especially in saturated soft soils with large compressibility and small permeability. It will cause extremely high excess pore water pressure, which will greatly change the stress field in the surrounding soil. This may cause the soil around the pile to uplift and horizontal displacement, and the adjacent pile heads will rise and shift. Phenomenon, and the...

AI Technical Summary

Problems solved by technology

However, prefabricated reinforced concrete pipe piles are soil-extruding piles. During the construction process, the same volume of soil needs to be displaced during pile sinking, especially in saturated soft soil with high compressibility and low permeability coefficient. It will cause extremely high ultra-static pore water pressure, which will cause great changes in the stress field in the surrounding soil, which may cause the soil around the pile to bulge and move in the horizontal direction, and the pile head of the adjacent pile will float and shift phenomenon, and the floating and offset will gradually increase with time, which will also affect the next construction

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