Application of a deep dense multi-branch pile forming device

Abstract

The invention relates to a pile forming device of a deep dense multi-branch pile and application thereof. The pile device comprises an excitation part, a pile forming part and a pile tip which are connected from up to down sequentially. The excitation part and the pile forming part are fixed correspondingly in a manner of hydraulic clamping or bolt connecting. The pile forming part and a multi-branch pile are the same in size. The pile forming part comprises a middle hollow round tube and multi-branch blades. The pile tip adopts a multi-segment movable structure; each movable segment is hinged with the pile forming part, closes in the process of inserting the pile forming part, and opens in the the process of lifting the pile forming part. The pile tip is pre-casted by concrete; when the pile forming part is inserted, the pre-casted pile tip is located at the bottom of the pile forming part; when the pile forming part is lifted, the pre-casted pile tip is separated from the pile forming part automatically.

Description

technical field [0001] The invention belongs to the technical field of construction, and in particular relates to a pile forming device for deep dense multi-branch piles and an application thereof. Background technique [0002] During the construction of railways, highways and other construction projects, foundation treatment is often required, and the selection of pile type and construction method directly determine the bearing capacity and economy of the pile body. The pile bearing the vertical downward load transfers the superstructure load to the deep soil (rock) layer of the foundation through the friction resistance of the side surface of the pile body and the resistance of the pile tip. Therefore, the vertical bearing capacity of the pile body is closely related to the geometric dimensions of the pile body, and in engineering projects, most of the piles mainly bear vertical loads. [0003] It can be known from engineering examples and design calculations that the lar...

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Problems solved by technology

[0008] 2. The length and size of the prefabricated toothed piles are relatively fixed. Although suitable sizes can be prefabricated in sections according to the needs of the construction site, the construction of this type of piles requires pile connection, which increases the construction process and reduces the reliability of the pile. At the same time, in the actual construction, due to the difference in the soil quality of the foundation, it is difficult to achieve the same length of all the piles on the same construction site, which will cause some piles to be cut off

[0009] 3. The prefabricated toothed piles are prefabricated in the factory, and they need to be transported long-distance when they arrive at the construction site. During the process of implanting the piles into the foundation, they need to be clamped by clamps or hammered into the piles, so the piles need to have sufficient strength. In order to ensure that there will be no breakage during transportation and construction, the choice of pile material needs to ensure the strength of the pile body, and the types of available materials are greatly limited.

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