A rigid connection structure of a pipe pile and a bearing platform

Abstract

The present application belongs to the field of building engineering pile foundation, and is a rigid connection structure of pipe pile and pile cap. The technical scheme is as follows: the pile top of the pipe pile extends into the lower part of the longitudinal reinforcement of the upper part of the pile cap, a supporting plate is placed in the pipe pile, and filling core concrete is poured in the space above the supporting plate; a conical ring cylinder is sleeved outside the extending section of the pipe pile extending into the pile cap, and the conical ring cylinder comprises a ring cylinder barrel, a ring cylinder bottom disc and a rib plate; the ring cylinder bottom disc is annular and located at the bottom of the ring cylinder barrel; the inner ring diameter of the ring cylinder bottom disc is the same as the inner diameter of the ring cylinder barrel; the rib plate is a triangular steel plate, and the two sides of the rib plate are respectively welded and fixed with the ring cylinder barrel and the ring cylinder bottom disc; a plurality of rib plates are arranged on the circumference of the ring cylinder barrel at intervals; the bottom longitudinal reinforcement of the pile cap is welded and fixed with the ring cylinder bottom disc; and the upper part of the ring cylinder barrel is welded and fixed with the pile top end plate of the pipe pile. The rigid connection structure is simple in principle, reliable in quality, convenient for factory prefabrication, and can realize the fixed connection and constraint between the pile top and the pile cap.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of pile foundation of construction engineering, and particularly relates to a connecting structure of pipe pile and pile cap, which can be widely applied to pile foundation of buildings subjected to horizontal load. BACKGROUND

[0002] With the rapid development of civil field in China, the situation of pile foundation subjected to horizontal load is paid more and more attention by engineering technicians in the construction of urban high-rise buildings, port wharfs, and anti-seismic engineering. The pipe pile is widely applied to the above foundation engineering due to its high single pile bearing capacity, fast construction speed, and reliable quality. In the pile foundation specification, the pile top node constraint condition needs to be considered in the calculation of horizontal bearing capacity and displacement of pile foundation, so as to determine the maximum bending moment coefficient of pile top and the horizontal displacement coefficient of pile top, and calculate the characteristic value of single pile horizontal bearing capacity. Generally, the pile top node constraint condition is between hinged and fixed states. The commonly used connecting mode is that the pile top extends into the pile cap by 5-10 cm, a supporting plate and a reinforcing bar are placed in the pipe pile, and filling core concrete is poured, that is, the supporting plate is arranged horizontally in the pipe pile, the upper part of the supporting plate is filled with concrete, and one part of the reinforcing bar is in the concrete of the pipe pile and the other part extends into the concrete of the pile cap. However, due to the complexity of site construction and the difference of operation level, the actual constraint condition is difficult to guarantee, and the hinged condition is usually calculated. Since the values of the horizontal displacement coefficient of pile top in the specification are quite different (2.441 and 0.940 respectively) when fixed and hinged, it is easy to cause the design to be too conservative and resource waste. Therefore, it has strong practical significance to develop a rigid connecting structure of pipe pile and pile cap which is simple in principle, reliable in quality, and convenient for factory prefabrication, and can realize the fixed constraint between the pile top and the pile cap. SUMMARY

[0003] The present application is provided to overcome the above-mentioned problems, and provides a rigid connecting structure of pipe pile and pile cap, which is simple in principle, reliable in quality, and convenient for factory prefabrication, and can realize the fixed constraint between the pile top and the pile cap.

[0004] The technical scheme of the present application is as follows: a rigid connecting structure of pipe pile and pile cap, the pile top of the pipe pile extends upward into the lower part of the upper longitudinal reinforcement of the pile cap, the part of the pipe pile in the pile cap is a extending-in section, and the extending-in section is filled with core concrete, characterized in that: a ring cylinder is sleeved outside the wall of the extending-in section and is fixed, the ring cylinder comprises a ring cylinder barrel, a ring cylinder bottom disc, and a rib plate; the ring cylinder bottom disc is annular, and forms an L-shaped cross section together with the ring cylinder barrel; a plurality of rib plates are arranged on the circumference of the ring cylinder barrel at intervals; the two sides of the rib plate are respectively welded and fixed with the ring cylinder barrel and the ring cylinder bottom disc; and the bottom longitudinal reinforcement of the pile cap is overlapped with the ring cylinder bottom disc and is welded and fixed.

[0005] Based on the above technical features: the top of the ring cylinder is flush with the top end of the pipe pile, and the upper part of the ring cylinder barrel is welded and fixed with the pile top end plate of the pipe pile.

[0006] Based on the above technical features: the core concrete is provided with the inserted rib anchoring into the pile cap.

[0007] Based on the above technical features: the rib plate is a triangular steel plate.

[0008] Based on the above technical features: the height of the ring cylinder barrel is the outer diameter of the pipe pile.

[0009] Based on the above technical features: the width of the ring cylinder bottom disc is the outer diameter of the pipe pile.

[0010] The connecting structure of the present application is a ring cylinder arranged in the pile cap, which is composed of a ring cylinder barrel for fixing and limiting the lateral displacement of the pipe pile, a ring cylinder bottom disc for limiting the longitudinal displacement of the pipe pile, and a rib plate for limiting the corner displacement of the pipe pile. The top of the ring cylinder barrel can be flush with the top surface of the pipe pile, so that the upper part of the ring cylinder barrel can be welded and fixed with the end plate of the pipe pile; the ring cylinder bottom disc is welded and fixed with the longitudinal steel bars at the bottom of the pile cap, and the core concrete is filled in the pipe pile; the pile cap steel bars, the ring cylinder, and the extended section of the pipe pile are poured with concrete to form a rigid joint. As an optimization, the inserted rib in the core concrete can be anchored into the pile cap to further reinforce the rigid joint. The pipe pile and the pile cap are connected as a whole through the ring cylinder with the rib plate. The structure can effectively limit the displacement and corner displacement of the pipe pile, and achieve the rigid connection of the pipe pile and the pile cap, thereby achieving the purpose of stabilizing the overall structure, and effectively avoiding the problems of insecurity or uneconomicalness caused by the difficulty in determining the constraint conditions and the coefficient values at the top of the pile.

[0011] Compared with the prior art, the present application effectively limits the displacement and corner displacement of the pipe pile, achieves the rigid connection of the pipe pile and the pile cap, and achieves the purpose of stabilizing the overall structure. The principle of the present application is simple, the construction is convenient, and the stress condition is reasonable. In the design and calculation process, the constraint conditions at the top of the pile can be considered. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a side view of the rigid connection structure of the pipe pile and the pile cap of the present application.

[0013] Figure 2 is a top view of the rigid connection structure of the pipe pile and the pile cap of the present application.

[0014] The reference signs in the figure are as follows: ring cylinder barrel 1, ring cylinder bottom disc 2, rib plate 3, inserted rib 4, pipe pile 5, supporting plate 6, bottom longitudinal steel bar 7, upper longitudinal steel bar 8, and pile cap 9. DETAILED DESCRIPTION

[0015] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate the present application, and are not limiting to the present application.

[0016] In the description of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0018] In addition, in the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0019] As shown in Figure 1 and Figure 2 , the top of the pipe pile 5 extends into the lower part of the upper longitudinal reinforcement 8 of the pile cap 9, and the upper longitudinal reinforcement 8 of the pile cap 9 can be arranged through the top of the pile. The part of the pipe pile 5 in the pile cap 9 is the inserted section. The support plate 6 is placed in the pipe pile 5, the core concrete in the inserted section can be poured through the support plate 6, the ring cylinder is sleeved outside the inserted section of the pipe pile 5 and fixed, the ring cylinder includes a ring cylinder barrel 1, a ring cylinder bottom plate 2 and a rib plate 3; the ring cylinder bottom plate 2 is annular and located at the bottom of the ring cylinder barrel 1, and forms an L-shaped cross section together with the ring cylinder barrel 1; the rib plate 3 is a triangular steel plate, two sides of the rib plate 3 are respectively welded and fixed with the ring cylinder barrel 1 and the ring cylinder bottom plate 2; a plurality of rib plates 3 are arranged on the circumference of the ring cylinder barrel 1, and the rib plates are generally uniformly distributed to increase the rigidity of the ring cylinder. The top elevation of the ring cylinder can be the same as or lower than the top elevation of the pipe pile 5, as long as the rigidity requirement is met. If the top elevation of the ring cylinder is the same as the top elevation of the pipe pile 5, the upper part of the ring cylinder barrel 1 is welded and fixed with the pile top end plate of the pipe pile 5, which is convenient for construction. The shape of the rib plate 3 is not limited, and is preferably triangular as shown in Figure 1 The bottom longitudinal reinforcement 7 of the pile cap 9 is welded and fixed with the ring cylinder bottom plate 2.

[0020] The pile top end plate is a part of the pipe pile and is a conventional component; placing the support plate in the pipe pile and pouring the core concrete are the prior art and can be implemented according to the prior art in the present application. The reinforcing bar 4 is an optimization of the present application, and is anchored in the core concrete of the pipe pile and in the concrete of the pile cap 9, thereby strengthening the rigid connection between the pipe pile and the pile cap.

[0021] The ring cylinder barrel 1, the ring cylinder bottom plate 2 and the rib plate 3 can be welded as a whole ring cylinder when pre-fabricated in the factory.

[0022] As an optimization, the height of the ring cylinder barrel 1 is the same as the outer diameter of the pipe pile; the width of the ring cylinder bottom plate 2 is the same as the outer diameter of the pipe pile. The ring cylinder barrel 1 is preferably welded and fixed in the range of the pile top of one pile diameter of the pipe pile, and the width of the ring cylinder bottom plate 2 is also preferably wide to one pile diameter.

[0023] The above only describes the preferred embodiments of the present application, and it should be noted that, for those skilled in the art, several improvements and replacements can be made without departing from the technical principles of the present application, and these improvements and replacements should also be considered within the protection scope of the present application.

Claims

1. A rigid connection structure of a pipe pile and a pile cap, a pile top of a pipe pile (5) is upwardly extended into a lower part of an upper longitudinal reinforcement (8) of a pile cap (9), a part of the pipe pile (5) in the pile cap (9) is an extended section, and the extended section is filled with core concrete, characterized in that: A ring sleeve is sleeved outside the wall of the protruding section and fixed, the ring sleeve comprises a ring sleeve barrel (1), a ring sleeve bottom plate (2) and a rib plate (3); the ring sleeve bottom plate (2) is annular and forms an L-shaped cross section together with the ring sleeve barrel (1); a plurality of rib plates (3) are arranged on the circumference of the ring sleeve barrel (1) at intervals; the two sides of the rib plate (3) are respectively welded and fixed with the ring sleeve barrel (1) and the ring sleeve bottom plate (2); the bottom longitudinal reinforcement (7) of the bearing platform (9) is overlapped and welded with the ring sleeve bottom plate (2); the top of the ring sleeve is flush with the top end of the pipe pile (5), the upper part of the ring sleeve barrel (1) is welded and fixed with the pile top end plate of the pipe pile (5); the insert (4) in the core concrete is anchored into the bearing platform (9).

2. The rigid connection structure of a pipe pile and a pile cap according to claim 1, characterized in that: The rib plate (3) is a triangular steel plate.

3. The rigid connection structure of a pipe pile and a pile cap according to claim 1, characterized in that: The height of the ring sleeve barrel (1) is the outer diameter of the pipe pile (5).

4. The rigid connection structure of a pipe pile and a pile cap according to claim 1 or 3, characterized in that: The width of the ring sleeve bottom plate (2) is the outer diameter of the pipe pile (5).

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