A kind of open high-strength concrete prefabricated pile and its pile form, centrifugal manufacturing method

Abstract

The invention relates to an open high-strength concrete prefabricated pile in the field of pile foundation engineering, a pile form thereof, and a centrifugal manufacturing method. 1) The outer high-strength concrete prefabricated pile body (2), and on the side of the high-strength concrete prefabricated pile body (2), there is a concave surface (3) with a centrifugally formed cross-section and an arc-shaped cross-section, depending on the shape of the cross-section. , proposed pile types such as H-type piles, groove piles, corner piles, open cylindrical piles, star piles, etc., and then put forward the pile mold and forming method of one-time centrifugal forming multi-section piles, and proposed open high-strength concrete precast piles and cement The structural composition and construction method of the PMW earth-retaining and water-stop pile combined with soil piles, the open high-strength concrete prefabricated pile of the present invention has high material strength, good flexural performance, small pile driving effect, and can greatly save the cost of pile foundation engineering. , the environmental protection benefits are outstanding.

Description

technical field [0001] The invention relates to the field of pile foundation engineering. Background technique [0002] Concrete prefabricated pile is an important form of pile foundation. It is widely used due to the advantages of fast construction speed, low cost and easy quality control. Existing concrete prefabricated piles mainly include concrete prefabricated square piles, pretensioned Stressed concrete pipe piles, prestressed concrete hollow square piles and other prefabricated pile forms. Among them, pretensioned prestressed concrete pipe piles and prestressed concrete hollow square piles have been widely used in recent years because of their high concrete strength, quick manufacture, and convenience for automated production. These two types of piles adopt the centrifugal forming process, through which the concrete is compacted, and a round hole is formed in the center of the pile section. After curing, a high-strength hollow concrete pile body can be formed, so it ...

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Problems solved by technology

However, these two types of piles are both closed pile types, that is, the gap in the pile section is located inside the pile section. During the pile sinking construction process, the soil body enters the hollow position and forms a soil plug, which is difficult to reduce by using the hollow pipe in the upper part of the pile body. Squeeze the soil effect of the pile, after the soil plug is formed, the resistance of the pile into the soil and the soil extrusion effect of the pile are equal to the solid pile, so it has the obvious disadvantage of the soil extrusion effect, and the bending resistance of the pile body is poor, so the current high-strength Concrete prefabricated piles are rarely used in foundation pit enclosure, and the hollow part of the pile body section is not fully utilized to reduce the resistance of pile sinking and the soil squeezing effect of pile sinking

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