Pi-shaped concrete pile

Abstract

The invention discloses a pi-shaped concrete pile which is made of concrete and comprises a pile body with a pi-shaped cross section. The pile body is composed of a cross beam located on the upper portion of the pile body and a supporting leg component located on the lower portion of the pile body and connected with the cross beam, the two sides of the cross beam are provided with a first connecting portion and a second connecting portion playing a connection role respectively, a gap is formed between matching faces of the first connecting portion and the second connecting portion, the matching faces are matched in shape in an abutting against mode, and the gap is filled with concrete grout and water-stopping rubber bars or sealing materials. The cross section of the pile body is in the pi shape, and the pile body has high bending resistance and high shear resistance in structural stress, and has a certain load bearing function. In addition, the connecting portions on the two sides are equivalent to buckling plates, the gap can be formed between the connecting portions after connectors are spliced and can be filled with the grout materials or other connecting materials, the water stopping effect and connecting strength can be guaranteed, and the pile can be used as a permanent supporting structure.

Description

technical field [0001] The invention relates to a concrete pile for soil retaining, slope protection and enclosure structures, in particular to a π-shaped concrete pile. Background technique [0002] Usually, due to the small distance between high-rise buildings, the excavation of foundation pits sometimes cannot be excavated by sloping. For the stability of the foundation pit and the safety of the surrounding buildings, it is necessary to carry out retaining support for the foundation pit; In the construction of high-grade highways, bridges, railway-highway interchanges and culverts, retaining support structures are also required. [0003] At present, the methods for foundation pit support mainly include bored piles and underground diaphragm walls. The economic cost of the shallow foundation pit foundation is relatively high; at present, some domestic foundation pit foundations also use steel sheet piles as foundation pit support materials. Although they can be used contin...

AI Technical Summary

Problems solved by technology

[0004] Diaphragm wall, the structure is suitable for water-saturated soft stratum, saturated muddy soil layer, etc.; in such soil layer, diaphragm wall can effectively block groundwater, but its cost is very high, and it is suitable for key municipal projects, not Applicable to general high-rise buildings and other projects

[0005] Bored piles use row pile walls to retain soil and waterproof, and realize foundation pit enclosure. It is not suitable for deep foundation pit engineering, the quality control is unstable, and the gaps between piles are easy to cause water and soil loss, especially in high-rise In soft clay soil areas with water level, appropriate construction measures need to be taken according to engineering conditions to solve the problem of water retention, and the piles are mainly formed by pile top crown beams and surrounding sandalwood as a whole, so the relative integrity is relatively poor

[0006] SMW (Soil Mixing Wall) construction method pile is to insert H-shaped steel or other types of stiff materials into the cement-soil mixing pile to enhance the bending and shearing resistance of the cement-soil mixing pile; although this method is faster than the construction speed of the underground diaphragm wall , occupies less land, but the cost of the process is higher than that of the enclosure pile, the amount of steel is large, and the construction is complicated

[0007] Steel sheet pile is a commonly used pile for underground maintenance structures. Although it has high bearing capacity, the pile diameter limit is small, so it is not suitable for deep foundation pit engineering, and its engineering volume is large, and its retaining pressure performance is not as superior as that of underground diaphragm wall. not low

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