CN216920305U

CN216920305U - Foundation pit supporting tubular pile connecting structure

Info

Publication number: CN216920305U
Application number: CN202220742548.3U
Authority: CN
Inventors: 吴健全; 黄伟江; 陈伟聪; 张一帆; 刘宏; 余灿然
Original assignee: Guangdong Zhongmei Jiangnan Engineering Survey And Design Co ltd
Current assignee: Guangdong Zhongmei Jiangnan Engineering Survey And Design Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-07-08
Anticipated expiration: 2032-03-31

Abstract

The utility model discloses a foundation pit supporting tubular pile connecting structure, aiming at enhancing the bending resistance and shearing resistance of the tubular pile connecting part and improving the reliability, and the technical scheme is as follows: the utility model provides a tubular pile connection structure is strutted to foundation ditch, is including the last tubular pile and the lower tubular pile that dock in proper order, a circular bottom plate has been arranged to the level in the inside cavity of lower tubular pile, the top of circular bottom plate forms one and holds the chamber, it is equipped with a steel reinforcement cage to hold the intracavity, the lower extreme of steel reinforcement cage is located the inside cavity of lower tubular pile, the upper end of steel reinforcement cage is located the inside cavity of last tubular pile, it pours the concrete layer that is used for wrapping up the steel reinforcement cage to hold the intracavity, belongs to construction technical field.

Description

Foundation pit supporting tubular pile connecting structure

Technical Field

The utility model belongs to the technical field of construction, and particularly relates to a tubular pile connecting structure for a foundation pit support.

Background

In a foundation pit, pipe piles are often employed as support piles. Because the foundation ditch develops towards the direction of being dark, big at present, and the support tubular pile often needs to connect the stake extension to handle, and the junction of two tubular piles then can form weak position, and bending resistance shear resistance is all relatively poor, so need strengthen the processing to the junction of two tubular piles.

In order to solve the problem, CN 15329843U discloses a high-strength prestressed steel pipe pile, which comprises a steel pipe pile body, lengthened body and coupling mechanism, coupling mechanism includes pipe box and lower pipe box, the welding has the locating lever that many equidistant settings set up on the lateral wall of pipe box, the welding has a plurality of equidistant settings and the corresponding locating piece of locating lever on the lateral wall of lower pipe box, the top of locating piece inwards is provided with the constant head tank, the cover is equipped with down the retainer plate on the lateral wall on steel-pipe pile body upper portion, the cover is equipped with last retainer plate on the lateral wall of lengthened body lower part, go up the pipe box and embolia the lengthened body from top to bottom and go up the retainer plate until its bottom in close contact with, the lower pipe box embolias the steel-pipe pile body from top to bottom and fixes the retainer plate under its bottom in close contact with, the lower part correspondence of locating lever inserts in the constant head tank, and locating lever lower part and locating piece are in the same place through first bolt fixed connection.

The tubular pile adopts the connecting mechanism to reinforce the joint between the two tubular piles, the bending resistance and the shearing resistance of the joint of the two tubular piles are improved mainly through the plurality of positioning rods, the structure is complex, the overall strength is influenced certainly if the pipe sleeve is loosened along with the passage of time, and the reliability is low.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a foundation pit supporting tubular pile connecting structure, aiming at enhancing the bending resistance and shearing resistance of the tubular pile connecting part and improving the reliability.

According to a first aspect of the utility model, a foundation pit supporting tubular pile connecting structure is provided, and comprises an upper tubular pile and a lower tubular pile which are sequentially butted, wherein a circular bottom plate is horizontally arranged in an inner cavity of the lower tubular pile, a containing cavity is formed above the circular bottom plate, a reinforcement cage is arranged in the containing cavity, the lower end of the reinforcement cage is positioned in the inner cavity of the lower tubular pile, the upper end of the reinforcement cage is positioned in the inner cavity of the upper tubular pile, and a concrete layer for wrapping the reinforcement cage is poured in the containing cavity.

Among foretell excavation supporting tubular pile connection structure, still be equipped with the module of hanging that makes circular bottom plate hang in the inside cavity of tubular pile under in the inside cavity of tubular pile, hang the module including taking the horizontal pole by the up end of tubular pile under, the horizontal pole extends a plurality of montant downwards, montant and circular bottom plate fixed connection.

In foretell excavation supporting tubular pile connection structure, the horizontal pole is two, two the horizontal pole vertically intersects and forms the cross.

In the foundation pit supporting tubular pile connecting structure, one the distance between two vertical rods and two vertical rods on the cross rod is greater than the diameter of the reinforcement cage.

In foretell excavation supporting tubular pile connection structure, the distance between the up end of circular bottom plate and lower tubular pile is greater than 1.5m, the length of steel reinforcement cage is greater than 3 m.

In foretell excavation supporting tubular pile connection structure, the steel reinforcement cage is located length in the inside cavity of lower tubular pile with the steel reinforcement cage is located length in the inside cavity of last tubular pile is unanimous.

In the above-mentioned tubular pile connection structure for foundation pit support, the steel reinforcement cage includes a plurality of main muscle, a plurality of stirrup that are used for stringing the main muscle that arrange along the length direction interval of main muscle, and the distance between two adjacent stirrups is 180 and gives other money 220 mm.

One of the above technical solutions of the present invention has at least one of the following advantages or beneficial effects:

according to the utility model, the circular bottom plate is arranged in the inner cavity of the lower tubular pile to construct the accommodating cavity, then the steel reinforcement cage is placed in the accommodating cavity, the concrete layer is poured, after the concrete layer is solidified, a connecting column is formed, the lower tubular pile and the upper tubular pile are connected in series, the bending resistance and the shearing resistance of the joint of the lower tubular pile and the upper tubular pile can be effectively enhanced, the connecting column, the inner cavity of the lower tubular pile and the inner cavity of the upper tubular pile are adhered together, the lower tubular pile and the upper tubular pile cannot be easily separated, and the reliability is also improved.

Drawings

The utility model is further described below with reference to the accompanying drawings and examples;

FIG. 1 is a structural sectional view of embodiment 1 of the present invention;

fig. 2 is a top view of the inventive example 1 with the upper tube stakes removed.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The following disclosure provides many different embodiments, or examples, for implementing different aspects of the utility model.

Example 1

Referring to fig. 1 to 2, in an embodiment of the utility model, a foundation pit supporting tubular pile connecting structure includes an upper tubular pile 1 and a lower tubular pile 2 which are butted in sequence, a circular bottom plate 3 is horizontally arranged in an inner cavity of the lower tubular pile 2, an accommodating cavity is formed above the circular bottom plate 3, a reinforcement cage 4 is arranged in the accommodating cavity, the lower end of the reinforcement cage 4 is located in the inner cavity of the lower tubular pile 2, the upper end of the reinforcement cage 4 is located in the inner cavity of the upper tubular pile 1, and a concrete layer 5 for wrapping the reinforcement cage 4 is poured in the accommodating cavity;

during the construction, set up a circular bottom plate 3 in earlier the inside cavity of tubular pile 2 down and construct one and hold the chamber, then place steel reinforcement cage 4 and pour concrete layer 5 holding the intracavity, treat concrete layer 5 solidification back, just can form a spliced pole, tubular pile 2 and top tubular pile 1 are played down in the spliced pole series connection, the bending resistance shear behavior of the junction of tubular pile 2 and top tubular pile 1 under can effectively strengthening, and the inside cavity of spliced pole and lower tubular pile 2, the inside cavity of top tubular pile 1 all is the adhesion together, can not separate easily, the reliability has also obtained the improvement.

In the embodiment, the expanded concrete is adopted when the concrete layer 5 is poured, so that the shrinkage of the concrete layer 5 in the solidification process can be compensated, and the concrete layer 5 is attached to the inner cavity of the lower tubular pile 2 and the inner cavity of the upper tubular pile 1;

and in order to ensure that the circular base plate 3 has sufficient supporting force, the circular base plate 3 may be a steel plate and have a thickness of 4-5 mm.

During actual construction, because the circular bottom plate 3 needs to be kept suspended, the arrangement method of the circular bottom plate 3 is always difficult, generally, the outer diameter of the circular bottom plate 3 is equal to or slightly larger than the diameter of the inner cavity of the lower tubular pile 2, and then the circular bottom plate 3 is plugged into the inner cavity of the lower tubular pile 2, so that the circular bottom plate 3 can be clamped in the inner cavity of the lower tubular pile 2;

or, a suspension module which enables the circular bottom plate 3 to be suspended in the inner cavity of the lower tubular pile 2 is arranged in the inner cavity of the lower tubular pile 2, the suspension module comprises a cross rod 6 which is abutted against the upper end face of the lower tubular pile 2, a plurality of vertical rods 7 extend downwards from the cross rod 6, the vertical rods 7 are fixedly connected with the circular bottom plate 3, and the circular bottom plate 3 is pulled by the cross rod 6 so as not to fall;

under the structure of the suspension module, due to the existence of the cross bar 6, the reinforcement cage 4 needs to be fixed on the circular bottom plate 3 firstly, then the cross bar 6 is arranged, when the circular bottom plate 3 is arranged, the reinforcement cage 4 is put into the inner cavity of the lower tubular pile 2 together, then the upper tubular pile 1 is butted, and finally concrete is poured; and because circular bottom plate 3 can not drop, the external diameter of circular bottom plate 3 can be less than the diameter of the inside cavity of tubular pile 2 down, make the outer wall of circular bottom plate 3 laminate the inner wall of tubular pile 2 down or remain a little less than the gap with the inner wall of tubular pile 2 down can.

Preferably, the number of the cross rods 6 is two, and the two cross rods 6 are vertically intersected to form a cross, so that better supporting force is achieved; in actual construction, a groove for embedding the cross bar 6 may be provided on the upper end surface of the lower pile 2 or the lower end surface of the upper pile 1.

Preferably, one of the cross rods 6 is provided with two vertical rods 7, and the distance between the two vertical rods 7 is greater than the diameter of the reinforcement cage 4, so that the four vertical rods 7 can surround the periphery of the reinforcement cage 4, and have a positioning function, and the reinforcement cage 4 can be stably fixed on the circular bottom plate 3 by matching with the cross rod 6.

In a specific embodiment, steel bars can be used as the vertical bars 7 and the cross bars 6, and the vertical bars 7 and the circular bottom plate 3 and the vertical bars 7 and the cross bars 6 are fixed together by welding.

In order to ensure that the concrete layer 5 can be effectively connected with the lower tubular pile 2 and the upper tubular pile 1, the reinforcement cage 4 needs to have a certain length in the inner chambers of the lower tubular pile 2 and the upper tubular pile 1, the limit of the length depends on the distance between the circular bottom plate 3 and the upper end face of the lower tubular pile 2, in the embodiment, the distance between the circular bottom plate 3 and the upper end face of the lower tubular pile 2 is greater than 1.5m, and the length of the reinforcement cage 4 is greater than 3 m.

Preferably, the length of the reinforcement cage 4 in the inner cavity of the lower tubular pile 2 is the same as the length of the reinforcement cage 4 in the inner cavity of the upper tubular pile 1, so that the stress of the subsequent concrete layer 5 is more balanced;

as a specific expression form of this embodiment, the distance between the circular bottom plate 3 and the upper end surface of the lower tubular pile 2 is 2m, and the length of the reinforcement cage 4 is 4 m.

In this embodiment, the reinforcement cage 4 includes a plurality of main reinforcements 41, and a plurality of stirrups 42 arranged at intervals along the length direction of the main reinforcements 41 and used for stringing the main reinforcements 41, and the distance between two adjacent stirrups 42 is 180 mm and 220mm, so that the reinforcement cage 4 has better strength; preferably, the distance between two adjacent stirrups 42 is 200 mm.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a foundation ditch support tubular pile connection structure, is including last tubular pile (1) and lower tubular pile (2) that dock in proper order, its characterized in that, a circular bottom plate (3) have been arranged to the level in the inside cavity of lower tubular pile (2), the top of circular bottom plate (3) forms one and holds the chamber, it is equipped with a steel reinforcement cage (4) to hold the intracavity, the lower extreme of steel reinforcement cage (4) is arranged in the inside cavity of lower tubular pile (2), the upper end of steel reinforcement cage (4) is arranged in the inside cavity of last tubular pile (1), it pours concrete layer (5) that are used for the parcel to live steel reinforcement cage (4) to hold the intracavity.

2. The foundation pit support tubular pile connecting structure according to claim 1, characterized in that be equipped with in the inside cavity of lower tubular pile (2) and make circular bottom plate (3) hang the module of hanging in the inside cavity of lower tubular pile (2), hang the module including taking horizontal pole (6) at the up end of lower tubular pile (2), horizontal pole (6) extend down a plurality of montant (7), montant (7) and circular bottom plate (3) fixed connection.

3. The foundation pit support tubular pile connecting structure according to claim 2, wherein the number of the cross rods (6) is two, and the cross rods (6) vertically intersect to form a cross.

4. The foundation pit support tubular pile connecting structure according to claim 3, wherein one of the cross rods (6) is provided with two vertical rods (7) and the distance between the two vertical rods (7) is greater than the diameter of the reinforcement cage (4).

5. The foundation pit support tubular pile connecting structure according to claim 1, wherein the distance between the circular bottom plate (3) and the upper end face of the lower tubular pile (2) is greater than 1.5m, and the length of the reinforcement cage (4) is greater than 3 m.

6. A foundation pit support tubular pile connecting structure according to claim 5, characterized in that the length that steel reinforcement cage (4) is located in the inner cavity of lower tubular pile (2) is the same as the length that steel reinforcement cage (4) is located in the inner cavity of upper tubular pile (1).

7. The foundation pit support tubular pile connecting structure according to claim 1, wherein the reinforcement cage (4) comprises a plurality of main reinforcements (41), and a plurality of stirrups (42) which are arranged along the length direction of the main reinforcements (41) at intervals and are used for stringing the main reinforcements (41), and the distance between two adjacent stirrups (42) is 180-220 mm.