Supporting and protecting pile and composed supporting and protecting row pile

Abstract

The invention discloses a supporting and protecting pile and a composed supporting and protecting row pile. The supporting and protecting pile comprises a precast concrete pile body with a reinforcingsteel bar cage composed of multiple vertical prestressed reinforcing steel bars and multiple transverse stirrups, and the cross section of the pile body is in a first rectangular shape with a first semicircular groove in one side. The supporting and protecting pile further comprises metal end plates at the two ends. Multiple through holes allowing the multiple vertical prestressed reinforcing steel bars to penetrate are formed in the metal end plates. Multiple guide insertion connection columns are arranged on one end plate, insertion connection blind holes which are in one-to-one correspondence with the multiple guide insertion connection columns are formed in the other end plate, horn mouth clamp rings with the large upper portions and the small lower portions are arranged in the holes,and each horn mouth clamp ring is composed of multiple metal elastic pieces. The long side of the supporting and protecting pile is close to the contact face of the foundation pit inner side around afoundation pit and the supporting and protecting pile and forms a ceaseless connection line extending in the length direction. The supporting and protecting pile and the composed supporting and protecting row pile have a small earth squeezing effect, are good in compactness, are large in contact area of the contact face of the foundation pit inner side around the foundation pit and the supportingand protecting pile, and are high in bending resistance.

Description

Technical field [0001] The invention relates to the technical field of building construction, in particular to a prefabricated pre-stressed reinforced concrete supporting pile used in foundation pit supporting and other projects and a supporting row of piles formed. Background technique [0002] Foundation pit support is to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit, supporting, strengthening and protecting the side walls of the foundation pit and the surrounding environment. The common foundation pit supporting structure is mainly row pile support. Among them, precast concrete circular hollow pipe piles, bored piles and SMW construction method piles are commonly used. The biggest disadvantage of circular hollow pipe piles is that they are The circular shape, even if it is arranged closely, cannot form a smooth and straight wall. The earth pressure shared by each circular supporting pile is not uniform, and th...

AI Technical Summary

Problems solved by technology

But there are still their own shortcomings: although the hollow prestressed concrete square piles are arranged close to each other, a wall with a smooth and straight wall and a good water-proof effect can be formed, and the contact surface between the wall and the inner side of the foundation pit can be directly used as a basement The outer membrane of the side wall, the support pile and the side wall of the basement form a composite wall, but the middle hole is also prone to soil plugging, which has a large soil squeezing effect in construction practice, which is likely to cause a relatively large negative impact on the surrounding environment

However, the H-shaped prestressed concrete pile cannot be manufactured by centrifugal method in the prefabrication process due to its irregular shape, so the compactness of the concrete pile is not ideal; equipment, its production cost and production difficulty are relatively high; especially in practical construction applications, only one of the two short sides of the pile body can be in contact with the contact surface inside the foundation pit, and the H-shaped prestressed concrete pile is tightly When arranged into a wall with smooth and straight walls, the contact surface of the corresponding H-shaped piles is generally only a quarter of that of the prestressed hollow square piles. When there is an error, the contact area between the piles will be smaller, so the H-shaped piles are generally arranged with a certain distance between the piles. The pile distance is affected by construction factors and cannot be guaranteed to be exactly the same. Therefore, each pile The uniformity of force on each pile is worse than that of the hollow square piles connected to form a wall, and the water-stop effect between the piles is not good.

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