Gear-shaped precast concrete segment pile

Abstract

The invention discloses a gear-shaped precast concrete segment pile comprising a plurality of pile segments, wherein pile segments are sequentially and fixedly connected with each other; the cross-sections of the pile segments are gear-shaped, and the pile segments are in a hollow structure with communicated inner cavities; a soil-taking channel and a guide structure are arranged in the inner cavities of the pile segments, and the inner cavities are also used as the soil-taking channel; the guide structure comprises a branch arm and a guide hole used for allowing a guide rod to pass through; and a plurality of through holes for air or water ejection are also arranged on a side wall of the pile segment. Because of the above structural design, the obtained gear-shaped precast concrete segment pile has the beneficial effects of high single-pile bearing force and the like.

Description

technical field [0001] The invention relates to the technical field of bridge construction on soft soil foundations, in particular to a gear-shaped prefabricated concrete segment pile. Background technique [0002] At present, the pile foundation of bridges on soft ground usually adopts the form of prefabricated piles or bored piles of equal diameter, and the cross-section generally adopts square or tubular shape. [0003] Restricted by construction equipment and geological conditions, the size of general concrete prefabricated piles is small (less than 600mm in diameter). Generally, hammering or vibrating pile sinking technology is used, and the main problems are: [0004] 1) The diameter of the concrete prefabricated pile is small, and the bearing capacity of a single pile is low, so the number of piles required is large. However, when the number of piles is large, the soil on the side of the piles will be squeezed when the piles are pressed, which will easily cause late...

AI Technical Summary

Problems solved by technology

However, when there are many piles, the soil on the side of the piles will be squeezed when the piles are pressed, which will easily cause lateral displacement or displacement of the constructed piles and affect the construction.

[0005] 2) The vibratory pile sinking process is limited by the limitations of construction equipment, and is generally only suitable for pile foundations of small buildings

The cross-sectional area of ​​the pile is relatively small, and the length is relatively short (generally less than 30 meters), which cannot meet the bearing capacity requirements of the bridge pile foundation.

[0006] 3) With the continuous improvement of urban environmental protection requirements, the construction of driven piles such as hammering is no longer suitable for use in urban areas due to negative effects such as noise and vibration.

[0008] 1) On-site pouring of concrete is required, and the construction speed is slow. Generally, the construction period of a pile takes 2 to 3 days, and the construction quality cannot be effectively controlled

[0009] 2) The construction process of bored piles has problems such as the mud generated during construction will pollute the environment, which does not meet environmental protection requirements

[0010] 3) During construction in soft soil foundation environment, if there is a little carelessness, the wall of the pile hole is easy to collapse and cause an accident

[0011] 4) The strength of underwater pouring concrete is generally not high, and basically can only reach C30

[0012] To sum up, there is currently no good solution for how to realize large-diameter bridge pile foundations on soft soil foundations

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