Connecting structure of precast concrete pipe pile and underground bearing platform

Abstract

The utility model discloses a connecting structure of precast concrete pipe piles and an underground bearing platform, which comprises a plurality of precast concrete pipe piles hammered into the ground in sequence and a bearing platform main body arranged among the plurality of concrete pipe piles, and a bearing platform reinforcement cage is arranged in the bearing platform main body; the tail end of each prefabricated concrete pipe pile is buried underground, a pile opening anchored to the bearing platform is reserved in the other end of each prefabricated concrete pipe pile, a core filling steel bar assembly is arranged in the pile opening of each prefabricated concrete pipe pile, and the core filling steel bar assemblies extend into the bearing platform steel bar cage. The core filling steel bar assembly comprises a base disc, a plurality of deformed steel bars penetrating through the base disc and a reinforcing binding belt wound between the deformed steel bars, and the base disc is installed on a pile opening of the prefabricated concrete pipe pile in an aligned mode. The core filling steel bars are directly added to the tail ends of the prefabricated concrete pipe piles and directly stretch into the bearing platform steel bars, connection is enhanced by pouring the core filling concrete, and connection between the prefabricated concrete pipe piles and the underground bearing platform is rapidly achieved in an anchoring mode.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, and in particular relates to a connection structure of a prefabricated concrete pipe pile and an underground cap. Background Art

[0002] Precast concrete pipe piles, also known as prestressed high-strength concrete pipe piles, are prefabricated in a prefabricated component processing plant, and after curing, they reach the strength required by the national standard, then transported to the construction site, driven into the soil by a pile driver, and then the foundation of the pedestal beam (slab) is poured on the top of the pile. This type of pipe pile has the advantages of high construction efficiency, controllable quality, and environmental friendliness.

[0003] Compared with the traditional cast-in-place concrete pile foundation technology, precast concrete pipe piles have significant advantages. First, the construction period of precast piles is shorter, usually shortening the time by two-thirds. Second, the cost of precast piles is lower, and the average construction and material cost per meter is lower than that of traditional methods. In addition, precast piles are more environmentally friendly because they reduce noise, dust and waste generation on the construction site. Finally, because precast piles are prefabricated in factories, the construction quality can be precisely controlled, which improves the controllability of construction quality.

[0004] On the other hand, when using prefabricated concrete piles, it is necessary to consider the connection method between the prefabricated concrete piles and the cap. In the prior art, the methods used are mainly:

[0005] Embedded plate connection: This connection method designs the end of the precast pile into a plate shape, which is connected to the cap by welding or bolting. This connection method has a reasonable design, convenient construction, and high connection strength, so it is widely used in many cases. However, this connection method requires the production of the end plate connector of the precast pile first, which increases the production process and cost. At the same time, if it is improperly processed or installed unsteadily, it may cause load transfer failure and affect the overall safety of the bridge.

[0006] Threaded connection: This connection method uses the threaded steel bar on the precast pile head, inserts it into the recycled steel bar sleeve on the cap, and tightens it with a wrench to achieve the connection. Threaded connection has the advantages of firm connection and high reliability, and is particularly suitable for heavy load transfer occasions. However, this connection method requires a length to be reserved in advance, and the length of the threaded connection is relatively long, so it is not suitable for locations with limited space.

[0007] Casing connection: Casing connection usually involves the steel casing of the precast pile head and the steel bars on the cap. The steel pipe of the precast pile head is sleeved on the steel bars on the cap, and then the precast pile head steel bars are inserted into the steel pipe, and finally fixed by welding. The advantage of casing connection is that it has a wide range of applications and can be used in places with limited space, but the connection strength is average and is not suitable for occasions where large loads are transferred. Utility Model Content

[0008] The utility model aims to provide a connection structure between a precast concrete pipe pile and an underground pedestal, by directly adding core-filling steel bars at the end of the precast concrete pipe pile, and the core-filling steel bars are directly extended into the pedestal steel bars, and the connection is strengthened by pouring core-filling concrete, and the connection between the precast concrete pipe pile and the underground pedestal is quickly achieved by anchoring.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is specifically as follows:

[0010] The connection structure of precast concrete pipe piles and underground caps comprises a plurality of precast concrete pipe piles hammered into the ground in sequence, a cap body arranged between the plurality of concrete pipe piles, a cap steel cage arranged in the cap body; the end of each precast concrete pipe pile is buried in the ground, and the other end is respectively provided with a pile opening for anchoring with the cap, and a core-filling steel bar assembly is arranged in the pile opening of each precast concrete pipe pile, and the core-filling steel bar assembly extends into the cap steel cage; the core-filling steel bar assembly comprises a base plate, a plurality of threaded steel bars respectively passing through the base plate, and a reinforcing binding belt wound between the plurality of threaded steel bars, and the base plate is aligned and installed on the pile opening of the precast concrete pipe pile.

[0011] Furthermore, one side of the base plate is connected with a detachable sleeve, and the sleeve extends into the precast concrete pipe pile.

[0012] Furthermore, the sleeve includes an outer cylinder and an inner cylinder, and the height of the outer cylinder is lower than the height of the inner cylinder.

[0013] Furthermore, a plurality of holes are arranged on the wall of the inner cylinder.

[0014] Furthermore, the end of the inner cylinder is connected to the base plate through threads.

[0015] Furthermore, the outer diameter of the outer cylinder is matched with the inner diameter of the precast concrete pipe pile.

[0016] Furthermore, the sleeve extends into the precast concrete pipe pile by 1-2 m.

[0017] Furthermore, a plurality of threaded steel bars are evenly distributed between the outer cylinder and the inner cylinder around the central axis of the sleeve.

[0018] Furthermore, core-filled concrete is poured inside the sleeve.

[0019] Furthermore, a plurality of threaded connection holes are provided on the base plate.

[0020] Compared with the prior art, the advantages of the utility model are: the utility model has a simple structure and operation composition. The height of the core concrete required is determined by the designed length of the precast concrete pipe pile, so that sleeves of different lengths can be used and connected on the base plate, and the corresponding threaded steel bars are passed through the base plate and inserted into the sleeves, and finally the concrete is directly poured. On the one hand, the embedding depth of the anchor and the size of the anchoring force will directly affect the strength of the connection. If improperly controlled, it may cause the connection to fail or the anchor to fall off; the utility model can ensure the specific length of the threaded steel bars extending into the pipe pile, ensure that it meets the design requirements, and ensure the stability of the connection. On the other hand, it can speed up the construction efficiency, and no additional prefabricated parts are required to connect the pipe pile and the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 The utility model is a structural schematic diagram of a connection structure between a precast concrete pipe pile and an underground cap.

[0023] Figure 2 The utility model is a schematic structural diagram of a sleeve of a connection structure between a precast concrete pipe pile and an underground cap.

[0024] Reference numerals:

[0025] 1. Precast concrete pipe piles; 2. Sleeve; 3. Threaded steel bar; 4. Core-filled concrete; 5. Base plate; 6. Cap body; 7. Inner tube; 8. Outer tube; 9. Holes. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present utility model, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0029] In addition, the terms “first”, “second”, “third”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0030] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connection", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0033] like Figure 1-Figure 2 As shown, the connection structure of precast concrete pipe piles and underground caps comprises a plurality of precast concrete pipe piles 1 hammered into the ground in sequence, a cap body 6 arranged between the plurality of concrete pipe piles, and a cap steel cage arranged in the cap body 6; and the end of each precast concrete pipe pile 1 is buried in the ground, and the other end is respectively left with a pile opening for anchoring with the cap, and a core-filling steel bar assembly is arranged in the pile opening of each precast concrete pipe pile 1, and the core-filling steel bar assembly extends into the cap steel cage; the core-filling steel bar assembly comprises a base plate 5, a plurality of threaded steel bars 3 respectively passing through the base plate 5, and a reinforcing binding belt wound between the plurality of threaded steel bars 3, and the base plate 5 is aligned and installed on the pile opening of the precast concrete pipe pile 1.

[0034] Compared with the prior art, in the prior art, in basement construction, prefabricated pipe piles can be used for foundation treatment to increase the stability of the basement; in high-rise buildings, prefabricated pipe piles can be used to consolidate the foundation to ensure the stability and firmness of the building structure; in commercial complex buildings, prefabricated pipe piles can be used to build parking lots, underground shopping malls and other underground spaces. After the prefabricated pipe piles are buried underground, they need to be connected to the cap, and the embedding depth and anchoring force used to connect the ground anchor will directly affect the strength of the connection. If improperly controlled, it may cause the connection to fail or the anchor to fall off. In the prior art, the anchor is basically inserted into the pipe pile to a certain depth by manual experience and poured with concrete core filling, which has a certain degree of randomness and the anchoring quality cannot be guaranteed. In the utility model, the core filling assembly used can directly determine the selected sleeve 2 depth according to the design requirements, so that the threaded rod is directly inserted into the bottom of the sleeve 2. As an anchor, it can effectively achieve the design requirements for the anchoring effect of each pipe pile, and its judgment method is unified, which can make the anchor more standard and reliable when connected.

[0035] One side of the base plate 5 is connected with a detachable sleeve 2, and the sleeve 2 extends into the precast concrete pipe pile 1. The sleeve 2 includes an outer tube 8 and an inner tube 7, and the height of the outer tube 8 is lower than that of the inner tube. Through the detachable sleeve 2, the end of the inner tube 7 is connected to the base plate 5 by threading, and the sleeve 2 of different depths can be adapted according to the specific depth of the pipe pile, and its structure is more flexible. And the sleeve 2 is divided into an inner tube 7 and an outer tube 8, wherein a plurality of holes are arranged on the wall of the inner tube 7, so that the concrete of the inner tube 7 and the outer tube 8 is more uniform during pouring.

[0036] The outer diameter of the outer cylinder 8 is matched with the inner diameter of the precast concrete pile 1. The outer cylinder 8 is attached to the inner wall of the precast concrete pile 1, and the entire sleeve 2 is inserted into the precast concrete pile 1 by 1-2m. A plurality of threaded steel bars 3 are evenly distributed between the outer cylinder 8 and the inner cylinder 7 around the central axis of the sleeve 2. The sleeve 2 is poured with core-filling concrete 4.

[0037] The base plate 5 is provided with a plurality of threaded connection holes.

[0038] During specific use, first, according to specific design requirements, the sleeve 2 of the corresponding depth is connected to the bottom of the base plate 5, and the threaded steel bar 3 is passed into the sleeve 2 to form a core-filled steel bar assembly, and the base plate 5 is installed in the precast concrete pipe pile 1 that has been buried underground, and then the pouring operation is carried out to form a concrete core, and the upper part of the threaded steel bar 3 is inserted into the steel cage of the pedestal and the pedestal is poured, so that the overall anchoring structure is more stable and reliable.

[0039] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. The connection structure of precast concrete pipe piles and underground cap is characterized by: The invention comprises a plurality of precast concrete pipe piles (1) hammered into the ground in sequence, a cap body (6) arranged between the plurality of concrete pipe piles, a cap steel cage arranged in the cap body (6); the end of each precast concrete pipe pile (1) is buried in the ground, and the other end is respectively provided with a pile opening for anchoring with the cap, and a core-filling steel bar assembly is arranged in the pile opening of each precast concrete pipe pile (1), and the core-filling steel bar assembly extends into the cap steel cage; the core-filling steel bar assembly comprises a base plate (5), a plurality of threaded steel bars (3) respectively passing through the base plate (5), and a reinforcing binding belt wound between the plurality of threaded steel bars (3), and the base plate (5) is aligned and installed on the pile opening of the precast concrete pipe pile (1).

2. The precast concrete pipe pile and underground cap connection structure according to claim 1 is characterized in that: One side of the base plate (5) is connected with a detachable sleeve (2), and the sleeve (2) extends into the precast concrete pipe pile (1).

3. The precast concrete pipe pile and underground cap connection structure according to claim 2 is characterized in that: The sleeve (2) comprises an outer cylinder (8) and an inner cylinder (7), and the height of the outer cylinder (8) is lower than that of the inner cylinder.

4. The precast concrete pipe pile and underground cap connection structure according to claim 3 is characterized in that: A plurality of holes are arranged on the wall of the inner cylinder (7).

5. The precast concrete pipe pile and underground cap connection structure according to claim 3 is characterized in that: The end of the inner cylinder (7) is connected to the base plate (5) via threads.

6. The precast concrete pipe pile and underground cap connection structure according to claim 3 is characterized in that: The outer diameter of the outer cylinder (8) is adapted to the inner diameter of the precast concrete pipe pile (1).

7. The precast concrete pipe pile and underground cap connection structure according to claim 2, characterized in that: The sleeve (2) extends into the precast concrete pipe pile (1) within 1-2 m.

8. The precast concrete pipe pile and underground cap connection structure according to claim 1, characterized in that: A plurality of threaded steel bars (3) are evenly distributed around the central axis of the sleeve (2) and between the outer cylinder (8) and the inner cylinder (7).

9. The precast concrete pipe pile and underground cap connection structure according to claim 7, characterized in that: Core-filling concrete (4) is poured inside the sleeve (2).

10. The precast concrete pipe pile and underground cap connection structure according to claim 1, characterized in that: The base plate (5) is provided with a plurality of threaded connection holes.

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