CN210031776U

CN210031776U - Prefabricated RPC tubular pile structure of flute formula type

Info

Publication number: CN210031776U
Application number: CN201920372575.4U
Authority: CN
Inventors: 罗小勇; 程俊峰; 李玲玲; 申智勇; 郭旭强
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2019-03-22
Filing date: 2019-03-22
Publication date: 2020-02-07
Anticipated expiration: 2029-03-22

Abstract

The utility model provides a prefabricated RPC tubular pile structure of flute formula type, includes by the RPC preparation, be equipped with the precast pile body structure of steel reinforcement cage in, the outside integrated into one piece of precast pile body structure has a plurality of concrete ribs of laying improvement precast pile body structural strength along the axial, the internal surface and the surface of precast pile body structure have all been painted waterproof coating layer. The utility model provides a RPC tubular pile simple structure, intensity is high, has greatly improved the problem that the pile foundation subsides, utilizes active concrete mobility good, intensity rigidity is big and bear advantages such as dynamic height for prefabricated RPC tubular pile surface tooth groove rib has high strength, can bear great pile week soil pressure and not destroyed by the extrusion, can provide mechanical bite-force and frictional resistance betterly simultaneously, has greatly improved the vertical and level of RPC tubular pile to the atress performance. Meanwhile, the composite waterproof coating coated on the outer surface of the pile can provide a certain protection effect for RPC tooth groove ribs on the periphery of the pile.

Description

Prefabricated RPC tubular pile structure of flute formula type

Technical Field

The utility model relates to a prefabricated RPC tubular pile structure of flute formula type belongs to the civil engineering field.

Background

At present, in bridge engineering or building engineering, the pile foundation structure has obvious effect and higher use value. However, the large settlement, especially the uneven settlement of the pile foundation, can cause the originally statically indeterminate structure to generate large secondary internal force, which causes the structure to crack or even damage; particularly, the requirement on the anti-settling capacity of the pile foundation is higher in a soft soil area. For the friction type pile foundation, the pile length is usually increased to obtain larger frictional resistance, so the manufacturing cost is greatly increased, the pile foundation is more easily pulled up and damaged by the influence of other effects such as underground water and the like on a building on the water surface, the upper structure can be seriously damaged by the pile foundation, and the later maintenance and correction cost is high and the construction difficulty is large. The traditional precast pile generally adopts a solid square pile and a tubular pile, which have poor strength and can not provide great mechanical biting force and frictional resistance. Meanwhile, the settlement or the pull-up of the existing piles causes the destruction of the superstructure, and the friction type piles generally require an increase in pile length to secure sufficient soil resistance, thereby causing an increase in construction costs.

Meanwhile, in some bridge projects mainly affected by horizontal transverse action, pile foundations are easy to crack and break due to steel bar yielding under the action of horizontal load. At the moment, larger transverse resistance is required to be provided by increasing the transverse rigidity of the pile, the conventional method is to increase the sectional area of the pile foundation, and the measure not only makes the pile foundation clumsy and is not easy to hammer and drive into construction; meanwhile, the cost of the pile foundation is greatly increased. Various problems brought by the pile foundation provide higher requirements for the mechanical property of the pile foundation structure, the problem of settlement is solved, and meanwhile, the problems of difficult cracking and steel bar yielding damage under the action of horizontal load are solved, so that higher requirements are provided for bridge engineering designers.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to above conventional pile foundation inhomogeneous settlement and make its upper structure produce the secondary internal force and it receive horizontal load effect down and the fracture destroys the scheduling problem, provide a novel prefabricated RPC tubular pile structure of flute type.

In order to solve the above technical problem, the specific embodiment of the present invention is: the utility model provides a prefabricated RPC tubular pile structure of flute formula type, includes by the RPC preparation, be equipped with the precast pile body structure of steel reinforcement cage in, the outside integrated into one piece of precast pile body structure has a plurality of concrete ribs of laying in order to improve precast pile body structural strength along the axial, the internal surface and the surface of precast pile body structure have all been scribbled waterproof coating layer. The RPC material has the advantages of high rigidity and strength, high bearing capacity, difficult cracking and corrosion and the like.

Furthermore, the concrete ribs are arranged at equal intervals, and the concrete ribs extend from the top surface of the precast pile body structure to the bottom surface of the precast pile body structure.

Further, the precast pile body structure comprises a pile body and a pile bottom, wherein the pile bottom is in an inverted cone shape.

Further, the cross section of the concrete rib is trapezoidal.

Furthermore, the waterproof coating layer is composed of polymer cement-based waterproof coating.

Furthermore, the reinforcement cage is formed by uniformly distributing and binding longitudinal stress bars, stirrups and frame stress bars.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses simply, reasonable in design, intensity is high, has greatly improved the problem that the pile foundation subsides, utilizes active concrete (RPC) mobility good for the easy shaping of stake foundation structure, the intensity of RPC, rigidity are big simultaneously, make prefabricated RPC tubular pile surface concrete rib have high strength, can bear great stake week soil pressure and not destroyed by the extrusion, can provide mechanical interlock and frictional resistance betterly, greatly improved the atress performance of precast pile body structure. Meanwhile, the diameter of the pile is reduced, the using amount of building materials such as concrete and steel bars is reduced, and material cost is saved. In addition, the composite waterproof coating coated on the outer surface and the inner surface of the precast pile body structure can provide a certain protection effect for concrete ribs on the periphery of the precast pile body structure.

To sum up, the utility model provides a RPC tubular pile simple structure, intensity is high, has greatly improved the problem that the pile foundation subsides, utilizes active concrete mobility good, intensity rigidity greatly reaches advantages such as bearing capacity height for prefabricated RPC tubular pile surface tooth slot rib has high strength, can bear great pile week soil pressure and not destroyed by the extrusion, can provide mechanical bite force and frictional resistance betterly, has greatly improved the vertical and level of RPC tubular pile to the atress performance. Meanwhile, the composite waterproof coating coated on the outer surface and the inner surface of the pile can provide a certain protection effect for RPC tooth groove ribs on the periphery of the pile. The utility model provides a RPC tubular pile can be prefabricated in the mill, treat to transport after the prefabrication is accomplished the scene hoist squeeze into can, have construction convenience, practice thrift the characteristics of cost.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a cross-sectional view of the pile body of the present invention;

in the figure: 1, pile body; 2, pile bottom; 3-concrete ribs; 4-waterproof coating layer; 5, prefabricating a pile body structure; 6-inner surface; 7-a reinforcement cage;

Detailed Description

The following provides a more detailed description of the present invention with reference to the accompanying drawings and detailed description.

As shown in fig. 1-2, a prefabricated RPC tubular pile structure of flute profile type, includes prefabricated pile body structure, prefabricated pile body structure 5 comprises pile body 1, pile bottom 2.

In this embodiment, 2 is the back taper at the bottom of the pile, and sets up in the lower part of precast pile body, and pile body periphery is provided with the outstanding concrete rib 3 of a plurality of from top to bottom, concrete rib 3 equidistant ground extend to the bottom of the pile by the pile bolck always.

In the embodiment, the pile body 1 and the pile bottom 2 are both made of reactive concrete (RPC) materials; and waterproof coating layers 4 are coated on the outer surface and the inner surface 6 of the precast concrete tubular pile. The waterproof coating layer 4 is mainly made of polymer cement-based waterproof coating.

In this embodiment, dispose vertical atress muscle, stirrup and frame muscle in the precast pile body structure and form steel reinforcement cage 7, atress muscle, stirrup and frame muscle are symmetrical homogeneity and distribute in the steel reinforcement cage.

A manufacturing and construction method of a tooth-groove type prefabricated RPC tubular pile structure comprises the following steps: (1) prefabrication of a pouring mold: and designing and manufacturing a required tubular pile structure mould according to various parameters such as the stress performance, the section size and the form of the RPC concrete tubular pile required in the actual engineering and by combining the actual parameters. (2) Prefabricating an RPC tubular pile reinforcement cage: and determining required reinforcing steel bars according to the stress performance, design parameters and the like of the tubular pile, and binding the reinforcing steel bars such as the longitudinal stress bar, the hoop bar, the frame stress bar and the like into a reinforcement cage according to requirements. (3) Pouring of an RPC pipe pile structure: and (3) placing the bound reinforcement cage into a pouring mold, pouring reactive concrete (RPC) into the mold, and placing the poured mold on a centrifuge for centrifugal molding. (4) Curing and painting waterproof paint: removing the die in the formed RPC pipe pile, and then performing later steam curing on the RPC pipe pile; and after the RPC pipe pile structure is steamed, spraying waterproof paint on the whole length of the outer surface and the inner surface of the pipe pile. (5) Piling: after the maintenance of the RPC pipe pile and the coating of the waterproof paint are finished, connecting the prefabricated RPC pipe pile with the pile top through a pile hammer, installing and hoisting the prefabricated RPC pipe pile to push downwards, and enabling the prefabricated RPC concrete pipe pile to sink quickly.

The above is only the preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.

Claims

1. The utility model provides a prefabricated RPC tubular pile structure of flute formula type, its characterized in that includes by the RPC preparation, be equipped with the precast pile body structure of steel reinforcement cage in, the outside integrated into one piece of precast pile body structure has a plurality of concrete ribs of laying in order to improve precast pile body structural strength along the axial, the internal surface and the surface of precast pile body structure have all been scribbled waterproof coating layer.

2. The pre-cast RPC pipe pile structure of claim 1, wherein the concrete ribs are made of RPC material.

3. The pre-cast RPC pipe pile structure of claim 1, wherein the concrete ribs are arranged at equal intervals and extend from the top surface of the pre-cast pile body structure to the bottom surface of the pre-cast pile body structure.

4. The pre-fabricated RPC pipe pile structure of claim 1, wherein the pre-fabricated pile body structure comprises a pile body and a pile bottom, and the pile bottom is in an inverted cone shape.

5. The slot-type prefabricated RPC pipe pile structure of claim 1, wherein the cross section of the concrete rib is trapezoidal.

6. The slot-type prefabricated RPC pipe pile structure of claim 1, wherein the waterproof coating layer is made of polymer cement-based waterproof coating.

7. The slot type prefabricated RPC tubular pile structure of claim 1, wherein the reinforcement cage is formed by uniformly distributed and bound longitudinal stress bars, stirrups and frame stress bars.