CN215165496U

CN215165496U - Precast pile with preset grouting pipe

Info

Publication number: CN215165496U
Application number: CN202120368986.3U
Authority: CN
Inventors: 庞作会; 胡玉银
Original assignee: Shanghai Feisheng Enterprise Management Co ltd
Current assignee: Shanghai Feisheng Enterprise Management Co ltd
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-12-14
Anticipated expiration: 2031-02-09

Abstract

The utility model discloses a precast pile with preset slip casting pipe, include a plurality of pile body of supreme coaxial setting down, wherein, be provided with an at least slip casting pipe in each pile body respectively, the bottom of bottommost pile body is provided with the stake point, and, be equipped with a plurality of grout outlet on the pipe wall of the slip casting pipe in wherein at least one pile body of a plurality of pile body. The utility model discloses a precast pile carries out the integration with pile body and slip casting pipe, consequently need not at pile sinking job site and carrying out the installation operation of slip casting pipe, also need not special protection slip casting pipe, has simplified the site labor, has improved slip casting efficiency and slip casting effect.

Description

Precast pile with preset grouting pipe

Technical Field

The utility model relates to a precast pile with preset slip casting pipe belongs to construction technical field.

Background

During the construction of a building, piles are usually constructed under the building to be built so as to support the building. The most important performance criteria for a pile is its load bearing capacity, the higher the load bearing capacity the better.

There are two general types of piles, i.e., concrete cast-in-place piles and precast piles. For the concrete bored concrete pile, the technical staff utility model discloses a back slip casting method, its mode through pouring into grout around the pile body improves the combining ability of pile body and surrounding soil body to improve the bearing capacity of stake. The post-grouting method of concrete cast-in-place pile has become one of the mature and common techniques in the field. However, for the precast pile, the grouting tool is not easy to install on the construction site, and the precast pile is easy to damage in the pile sinking process after installation, so that the post-grouting technology of the precast pile is slow in progress. Therefore, it would be necessary to develop a precast pile technology that facilitates post-grouting construction.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a precast pile who has preset slip casting pipe convenient to carry out back slip casting construction.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a precast pile with preset slip casting pipe, includes from supreme a plurality of pile body of coaxial setting down, wherein, is provided with an at least slip casting pipe in each pile body respectively, and the bottom of bottommost pile body is provided with the stake point, and, be equipped with a plurality of grout outlet on the pipe wall of the slip casting pipe in wherein at least one of a plurality of pile body.

Further: the at least one grouting pipe is uniformly arranged in the pile body.

Further: the number of the grouting pipes is two.

Further: the grout outlet is positioned on the lower pipe wall of the grouting pipe.

Further: the grout outlet holes are uniformly arranged along the pipe wall of the grouting pipe.

Further: the pile tip is a quadrangular pyramid type, a hexagonal pyramid type, a conical type or a cross-shaped pile tip.

Further: the slip casting pipe is a metal slip casting pipe or a slip casting pipe made of hard nonmetal materials.

Further: the pile body is a hollow pile body or a solid pile body.

Further: when the pile body is a hollow pile body, the pile tip is a closed pile tip.

The utility model discloses a precast pile arranges the slip casting pipe in advance in the pile body to when carrying out pile sinking construction, need not at the on-the-spot slip casting pipe of installing, and, because the slip casting pipe has set up in advance in the pile body, consequently also need not to carry out special protection to the slip casting pipe when the construction, can carry out back slip casting operation to precast pile convenient and fast ground and improve its bearing capacity, simplified the site work, improved slip casting efficiency and slip casting effect. Furthermore, the utility model discloses a precast pile structure not only is applicable to the tubular pile and also is applicable to the square pile, no matter be hollow pile or solid pile all can adopt this structure moreover, and economic nature is good, and applicable face is wide.

Drawings

Fig. 1 shows a schematic structural diagram of a precast pile with a preset grouting pipe according to the present invention;

fig. 2 shows a cross-sectional view of the pile body of the precast pile with the pre-set grouting pipe according to an embodiment of the present invention; and

fig. 3 shows a cross-sectional view of the pile body of the precast pile with the pre-grouting pipe according to another embodiment of the present invention.

Detailed Description

The following describes the embodiments of the present invention with reference to the accompanying drawings.

The utility model provides a precast pile 1 with preset slip casting pipe, as shown in fig. 1-3, it includes pile body 11, be located pile tip 12 of pile body 11 bottom and set up in an at least slip casting pipe 14 of pile body 11 inside along the axial direction of pile body 11. In the present invention, the material of the pile body 11 is not particularly limited, and concrete piles, steel piles, etc. commonly used in the field can be applied to the precast pile 1 of the present invention; in addition, the cross-sectional shape of the pile body 11 is not required, and the cross-section commonly used in the field, including but not limited to, circular, square, etc., can be adopted; whether the cross section of the pile body changes along the longitudinal direction of the pile body is not particularly limited, and for example, bamboo joint piles can be adopted. Finally, the pile body 11 can also be a hollow pile body or a solid pile body. As the grouting pipe 14, a grouting pipe made of a metal material or a hard non-metal material may be used as long as it does not affect the strength of the pile body and the construction of the pile body, whether the static pressure method or the hammering method is used for pile sinking construction, and the grouting pipe 14 may be pre-placed inside the pile body 11 by means of, for example, pouring. The number of the grouting pipes 14 in each pile body 11 may be one or several, so as to avoid the situation that the grouting pipes 14 cannot be grouted if being blocked if only one grouting pipe is provided. In the case where a plurality of grouting pipes 14 are provided, each grouting pipe 14 is preferably arranged in the pile body 11 uniformly and symmetrically with respect to the pile body 11 so as to provide uniform grouting. Further, in the present invention, two symmetrically arranged grouting pipes 14 are preferably disposed in the pile body 11.

In the pile sinking construction process, the precast pile 1 can include a plurality of pile bodies 11 coaxially stacked from bottom to top as required, when the precast pile 1 includes two or more pile bodies 11, the pile tip 12 is located at the bottom of the bottommost pile body 13, the pile tip 12 can adopt a quadrangular pyramid type, a hexagonal pyramid type, a conical type, a cross type or other types of pile tips common in the field according to actual needs, and a plurality of slurry outlet holes 141 with the aperture of 5mm-8mm are arranged at the preferable lower position of the grouting pipe 14 in at least one pile body 13 of the plurality of pile bodies along the pipe wall of the grouting pipe 14, and the slurry outlet holes 141 are preferably uniformly arranged along the pipe wall of the grouting pipe 14. As shown in fig. 2-3, which respectively show the sectional views of the bottommost pile body 13 and the other pile bodies 11 in the precast pile 1, the precast pile 1 is a square hollow pile with a cavity 10, the grouting pipe 14 is located outside the cavity 10 (fig. 2), and the grouting pipe 14 of the bottommost pile body 13 is provided with a grouting hole 141 (fig. 3).

The utility model discloses as above during the precast pile is sinking pile construction, work as when the precast pile is hollow precast pile, promptly, when having cavity 10 in the pile body 11, stake point 12 adopts the stake point of remaining silent, and all the other stake ends then adopt the steel sheet welding to seal. When two adjacent pile bodies 11 are connected, the steel plates at the end parts of the pile bodies 11 are welded from the periphery of the pile bodies, so that even if the grouting pipes 14 in the two adjacent pile bodies 11 are not welded or are in butt joint with deviation at the pile connecting part, cement paste flows from top to bottom in the grouting pipes 14 in the subsequent grouting process, the cement paste does not flow into the pile body cavity at the pile connecting part and does not flow into soil outside the pile, namely, the cement paste only flows to one section of the lower part of the bottommost section of the grouting pipe in the grouting pipes 14, then flows out of the pile from the grouting holes 141 of the section of the grouting pipe, and then flows to the upper part and the periphery, and does not flow into the pile body cavity at the bottom of the pile. When the precast pile 1 is a solid precast pile, compared with the hollow precast pile, the precast pile 1 does not need a closed pile tip, so that the construction is simpler and more convenient. In addition, whether the hollow precast pile or the solid precast pile is adopted, a valve (not shown) is further arranged on a grouting pipe at the pile top (namely, the grouting pipe 14 in the topmost pile body 11) so as to be closed immediately after grouting is finished, and backflow of cement slurry is prevented.

The present invention has been described in detail with reference to the preferred embodiments. However, variations and additions to the embodiments will become apparent to those of ordinary skill in the art upon a reading of the foregoing description. It is the intention of the applicant that all such variations and additions fall within the scope of the claims. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless otherwise defined, all terms (including technical and scientific terms) used herein are the same as commonly understood by one of ordinary skill in the art to which this invention belongs. Any modification and improvement of the product, substitution and use of the same or similar substances in the patent scope or category, shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a precast pile with preset slip casting pipe, includes a plurality of pile body from supreme coaxial setting down, its characterized in that: the pile body is internally provided with at least one grouting pipe, wherein the bottom of the bottommost pile body is provided with a pile tip, and the pipe wall of the grouting pipe in at least one of the pile bodies is provided with a plurality of grout outlet holes.

2. A precast pile with preplaced grout tubes as set forth in claim 1, wherein: the at least one grouting pipe is uniformly arranged in the pile body.

3. A precast pile with preplaced grout tubes as set forth in claim 2, wherein: the number of the grouting pipes is two.

4. A precast pile with preplaced grout tubes as set forth in claim 1, wherein: the grout outlet is positioned on the lower pipe wall of the grouting pipe.

5. A precast pile with preplaced grout tubes as set forth in claim 4, wherein: the grout outlet holes are uniformly arranged along the pipe wall of the grouting pipe.

6. A precast pile with preplaced grout tubes as set forth in claim 1, wherein: the pile tip is a quadrangular pyramid type, a hexagonal pyramid type, a conical type or a cross-shaped pile tip.

7. A precast pile with preplaced grout tubes as set forth in claim 1, wherein: the slip casting pipe is a metal slip casting pipe or a slip casting pipe made of hard nonmetal materials.

8. A precast pile with preplaced grout pipes according to any one of claims 1 to 7, wherein: the pile body is a hollow pile body or a solid pile body.

9. A precast pile with preplaced grout tubes as set forth in claim 8, wherein: when the pile body is a hollow pile body, the pile tip is a closed pile tip.