CN211898496U

CN211898496U - Pile splicing structure for precast pile and foundation bearing platform

Info

Publication number: CN211898496U
Application number: CN201922460616.8U
Authority: CN
Inventors: 陈俊; 陈浩; 刘亚军; 周军; 陈忠良
Original assignee: Shanghai Construction No 7 Group Co Ltd
Current assignee: Shanghai Construction No 7 Group Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-10
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to a pile extension structure for precast pile and basic cushion cap. The pile splicing structure comprises a first reinforcement cage and first concrete, wherein the first reinforcement cage is poured by the first concrete; the first steel bar cage comprises first steel bars and second steel bars, the first steel bars are anchored into the foundation bearing platform, and the first steel bars are formed by extending third steel bars in the precast pile towards the direction of the foundation bearing platform; the second rebar is disposed around the first rebar. Above-mentioned pile extension structure for precast pile and basic cushion cap reduces the construction degree of difficulty, reduce cost, reduces the structural modification, satisfies precast pile and tower crane foundation cushion cap reliable connection simultaneously.

Description

Pile splicing structure for precast pile and foundation bearing platform

Technical Field

The utility model relates to a construction technical field especially relates to a pile extension structure for precast pile and basic cushion cap.

Background

In the building engineering, it has become a common site to adopt precast piles in the pile foundation engineering. The precast pile is made of various materials and in various forms in factories or construction sites, and is driven, pressed or vibrated into the soil by pile sinking equipment. The precast pile can bear larger load, is firm and durable, has high construction speed, is more environment-friendly and easy to control the quality in the precast pile prefabricating process, is simple to construct, has low technical difficulty, and can be continuously constructed in the construction period. Concrete solid square piles, prestressed concrete hollow pipe piles, prestressed concrete hollow square piles and the like are commonly used.

Due to various advantages of the precast pile, the precast pile can be gradually applied to a tower crane foundation bearing pile under the condition of meeting safety conditions. In actual construction, the quality control of the precast pile mainly comprises the following steps: firstly, whether the requirement of the penetration degree or elevation specified by design can be met or not; and whether the deviation after the pile is driven is within the allowable range of the construction specification. However, the amount of engineering of the pile foundation is generally large, and during design and structural design of the pile foundation and actual construction, differences in elevation control often exist, resulting in the situation that the elevation difference exists between the elevation of the pile top and the elevation of the bearing platform. Typically, the bearing platform is constructed to meet the pile top elevation, which increases costs.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a pile splicing structure for a precast pile and a foundation cap, which aims at improving the elevation control accuracy and reducing the cost.

A pile splicing structure for a precast pile and a foundation cap comprises a first reinforcement cage and first concrete, wherein the first reinforcement cage is poured by the first concrete; the first steel bar cage comprises first steel bars and second steel bars, the first steel bars are anchored into the foundation bearing platform, and the first steel bars are formed by extending third steel bars in the precast pile towards the direction of the foundation bearing platform; the second rebar is disposed around the first rebar.

The pile splicing structure for the precast pile and the foundation bearing platform comprises a first steel reinforcement cage and first concrete, wherein the first steel reinforcement cage is cast by the first concrete, the first steel reinforcement cage comprises a first steel reinforcement and a second steel reinforcement, the first steel reinforcement is anchored into the foundation bearing platform, and the first steel reinforcement is formed by extending a third steel reinforcement in the precast pile towards the direction of the foundation bearing platform, namely, the pile splicing structure is positioned between the precast pile and the foundation bearing platform, and the second steel reinforcement is arranged around the first steel reinforcement, so that when the pile foundation design of the precast pile and the precast pile foundation of the structural design have different heights, the pile splicing structure is arranged between the precast pile foundation and the foundation bearing platform, the bearing platform does not need to be processed, the cost is reduced, and the elevation of the pile top can be met, in addition, the pile splicing structure comprises the first steel reinforcement cage and the first concrete, the first steel reinforcement cage comprises the first steel reinforcement and the second steel reinforcement, so that the strength of the pile splicing structure is ensured, and the first reinforcing bar is extended and form toward the direction of basic cushion cap by the third reinforcing bar in the precast pile, and construction convenience reduces the influence to the primary structure.

In one embodiment, the diameter of the first reinforcement cage is larger than the diameter of the precast pile.

In one embodiment, the pile splicing structure has a diameter twice the diameter of the precast pile.

In one embodiment, the height of the first reinforcement cage is the difference between the elevation and the height of the precast pile.

In one embodiment, the concrete foundation further comprises a cushion layer, and the cushion layer is positioned on one side of the first concrete far away from the foundation bearing platform.

In one embodiment, the bedding layer is disposed around the periphery of the precast pile.

In one embodiment, the strength of the first concrete is greater than the strength of the second concrete poured into the precast pile.

Drawings

Fig. 1 is a schematic structural view illustrating a pile splicing structure connecting a precast pile and a foundation cap according to an embodiment.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1, an example pile splicing structure 100 includes a first reinforcement cage 110 and a first concrete 120. The pile extension structure 100 is used for the precast pile 200 and the foundation cap 300, that is, the pile extension structure 100 connects the precast pile 200 and the foundation cap 300. In the construction process, the pile extension structure 100 is directly constructed on the precast pile 200.

Specifically, the first reinforcement cage 110 is cast with the first concrete 120, i.e., the first concrete 120 is cast within the first reinforcement cage 110, forming a first concrete structure, i.e., a spliced concrete structure. The pile splicing structure 100 is obtained by casting a first concrete 120 inside the first reinforcement cage 110. In one embodiment, the strength of the first concrete 120 is greater than the strength of the second concrete poured into the precast pile 200. In other words, the strength of the concrete used for the pile extension structure 100 is greater than that of the precast pile 200, thereby ensuring the strength of the pile extension structure 100. It should be noted that the strength of the concrete used for the pile extension structure 100 may be increased by one level compared to the strength of the concrete used for the precast pile 200.

The first reinforcement cage 110 includes first reinforcements 111 and second reinforcements 112, the first reinforcements 111 are anchored into the foundation cap 300, and the first reinforcements 111 are formed by extending third reinforcements in the precast pile 200 toward the foundation cap 300. Referring to fig. 1 again, the third reinforcement in the precast pile 200 is the reinforcement cage, i.e., the steel reinforcement cage 210 of the tank core. According to the actual elevation of construction, the height of the pile extension structure 111 is determined, and the first steel bars 111 directly extend from the tank core reinforcement cage 210 to the direction of the foundation bearing platform 300 and are anchored into the foundation bearing platform 300. At this time, since the third reinforcement is a reinforcement cage of the precast pile, the first reinforcement 111 includes transverse and longitudinal reinforcements, that is, the longitudinal reinforcement in the first reinforcement 111 is anchored into the foundation cap 300 in the actual construction process. It should be noted that the first steel bar 111 may be connected to the third steel bar by welding, and the first steel bar 111 may also be a part of the third steel bar directly.

The second reinforcing bars 112 are arranged in parallel and/or perpendicular to the first reinforcing bars 111, thereby facilitating construction and saving costs while securing the strength of the precast pile 200. In this embodiment, the second reinforcing bar 112 is disposed around the first reinforcing bar 111, that is, the second reinforcing bar 112 and the first reinforcing bar 111 may be connected by welding or the like. As can be seen from the above, the first reinforcement bar 111 is a reinforcement cage, such that the second reinforcement bar 112 is arranged around the first reinforcement bar 111, i.e. a peripheral reinforcement cage is formed outside the first reinforcement bar 111, and the first reinforcement bar 112 and the second reinforcement bar 111 together form the first reinforcement cage 110 of the pile splicing structure 100. At this time, the second reinforcing bars 112 include longitudinal reinforcing bars extending in a direction from the precast pile 200 toward the foundation cap 300, and transverse reinforcing bars connected to the longitudinal reinforcing bars, which are anchored into the foundation cap 300.

The pile extension structure 100 for the precast pile 200 and the foundation cap 230 includes a first reinforcement cage 110 and a first concrete 120, the first reinforcement cage 110 is cast by the first concrete 120, the first reinforcement cage 110 includes a first reinforcement 111 and a second reinforcement 112, the first reinforcement 111 is anchored into the foundation cap, and the first reinforcement 111 is formed by extending a third reinforcement in the precast pile in a direction toward the foundation cap, that is, the pile extension structure 100 is located between the precast pile 200 and the foundation cap 300, the second reinforcement 112 is disposed around the first reinforcement 111, so that when the pile design of the precast pile and the precast pile of the structural design have a difference in elevation, the pile extension structure is disposed between the precast pile and the foundation cap without processing the cap, thereby reducing the cost and satisfying the elevation of the pile top, in addition, the pile extension structure includes the first reinforcement cage 110 and the first concrete 120, the first reinforcement cage 110 includes the first reinforcement 111 and the second reinforcement 112, thereby guarantee the intensity of pile extension structure, and first reinforcing bar 111 is extended and form toward the basic cushion cap direction by the third reinforcing bar in the precast pile, and construction convenience reduces the influence to the primary structure.

In an embodiment, the diameter of the first reinforcement cage 110 is larger than the diameter of the precast pile 200, thereby ensuring the strength of the pile extension structure 100. Further, the pile extension 100 may have a diameter twice that of the precast pile 200. Wherein the diameter of the precast pile 200 is determined according to on-site construction.

In one embodiment, the height of the first reinforcement cage 110 is the difference between the elevation and the height of the precast pile. That is, the height of the precast pile 200 according to the structural design cannot meet the elevation due to factors such as site construction, and the pile extension structure 100 is provided on the pre-fabricated pile 200, so that the height of the precast pile 200 meets the design requirement.

Further, in an embodiment, the pile connecting structure 100 further comprises a cushion layer 130, and the cushion layer 130 is located on a side of the first concrete 120 away from the foundation cap 300. That is, the spacer 130 is used to encapsulate the first concrete 120. Further, the cushion layer 130 may be disposed around the periphery of the precast pile 200, so that the pile splicing structure 100 and the precast pile 200 are formed as a single body, further ensuring strength.

By adopting the pile splicing structure 100, the construction difficulty is reduced, the cost is reduced, the structural modification is reduced, and the reliable connection of the precast pile and the tower crane foundation bearing platform is met.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A pile splicing structure for a precast pile and a foundation pile cap is characterized by comprising a first reinforcement cage and first concrete, wherein the first reinforcement cage is poured by the first concrete; the first steel bar cage comprises first steel bars and second steel bars, the first steel bars are anchored into the foundation bearing platform, and the first steel bars are formed by extending third steel bars in the precast pile towards the direction of the foundation bearing platform; the second rebar is disposed around the first rebar.

2. A pile splicing structure according to claim 1, wherein the diameter of the first reinforcement cage is larger than the diameter of the precast pile.

3. Pile splicing structure according to claim 2, wherein the diameter of the pile splicing structure is twice the diameter of the precast pile.

4. A pile splicing structure according to any one of claims 1-3, wherein the height of the first reinforcement cage is the difference between the elevation and the height of the precast pile.

5. A pile splicing structure according to any one of claims 1 to 3, further comprising a backing layer located on the side of the first concrete remote from the foundation cap.

6. A pile splicing structure according to claim 5, wherein the bedding layer is disposed around the periphery of the precast pile.

7. A pile splicing structure according to claim 1, wherein the strength of the first concrete is greater than the strength of the second concrete poured into the precast pile.