Steel sleeve cast-in-situ bored pile fixing structure convenient to disassemble and assemble

Abstract

The utility model discloses a steel sleeve cast-in-situ bored pile fixing structure convenient to disassemble and assemble, which comprises a steel sleeve, and a reinforcement cage is arranged in an inner cavity of the steel sleeve; concrete is poured into an inner cavity of the steel sleeve, and the reinforcement cage is embedded in the concrete; a waist beam is arranged in the middle of the outer side of the steel sleeve, and a plurality of embedded steel bars are arranged at the position, flush with the waist beam, of the steel sleeve in the radial direction. A turn buckle is obliquely arranged on the side, close to the waist beam, of the steel sleeve, the upper end of the turn buckle is connected with the steel sleeve, and the lower end of the turn buckle is connected with the waist beam. The detachable turn buckle is arranged between the steel sleeve cast-in-situ bored pile and the concrete waist beam, so that the overall stability of the steel sleeve cast-in-situ bored pile is conveniently improved, and the problem that the steel sleeve cast-in-situ bored pile and the waist beam hanging bar are inconvenient to mount and dismount is solved; the overall stress of the waist beam, the turn buckle and the steel sleeve cast-in-situ bored pile is facilitated, a stress system is formed, cast-in-situ pile construction is facilitated, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support in construction engineering, in particular to a steel sleeve bored pile fixing structure which is easy to disassemble and assemble. Background Art

[0002] With the rapid development of urbanization, urban space is gradually optimized. There are a large number of foundation pit excavation projects in roads and municipal engineering, and the excavation of underground structures near existing buildings is increasing year by year. In order to protect the construction safety of the main structure in the foundation pit of the adjacent construction and the safety of the surrounding environment of the foundation pit to avoid landslides, it is usually necessary to set up retaining members to support or reinforce the side walls of the foundation pit. The commonly used foundation pit support structure is steel sleeve bored piles. When the foundation pit is deep, it is necessary to further set a waist beam at a certain depth below the top of the steel sleeve bored piles, so that multiple steel sleeve bored piles are connected into a whole, increasing the stiffness of the anchor and internal support.

[0003] However, the existing concrete waist beam is connected with the steel sleeve bored pile, and the concrete waist beam is generally fixed with the steel sleeve bored pile in the form of embedded reinforcement and upper hanging reinforcement. However, there is a problem that the steel casing hanging reinforcement is difficult to connect with the main reinforcement of the bored pile outside the steel casing bored pile, and the hanging reinforcement is difficult to remove, which makes the construction of the steel sleeve bored pile more troublesome. Summary of the invention

[0004] The utility model aims to provide a steel sleeve bored pile fixing structure which is easy to assemble and disassemble, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A steel sleeve bored pile fixing structure which is easy to disassemble and assemble, comprises a steel sleeve, wherein a steel cage is arranged in the inner cavity of the steel sleeve; the inner cavity of the steel sleeve is poured with concrete, wherein the steel cage is embedded in the concrete; a waist beam is arranged in the middle position of the outer side of the steel sleeve, wherein a plurality of embedded steel bars are radially arranged at a position where the steel sleeve is flush with the waist beam; a basket bolt is obliquely arranged on one side of the steel sleeve close to the waist beam, wherein the upper end of the basket bolt is connected to the steel sleeve, and the lower end of the basket bolt is connected to the waist beam.

[0007] Preferably, an angle steel is welded on the upper side of the steel sleeve close to the waist beam, wherein a mounting hole is opened on the angle steel.

[0008] Preferably, a hook is provided at the top of the waist beam, wherein the lower end of the hook is welded to the transverse main reinforcement inside the waist beam.

[0009] Preferably, the basket bolt includes a first adjusting rod, a second adjusting rod and a pull rod, wherein nuts are respectively provided at both ends of the pull rod; one end of the first adjusting rod is threadedly engaged with the nut at the upper end of the pull rod, wherein the other end of the first adjusting rod is provided with a hook, and the hook is detachably connected to the mounting hole opened on the angle steel; one end of the second adjusting rod is threadedly engaged with the nut at the lower end of the pull rod, wherein the other end of the second adjusting rod is provided with a hanging ring, and the hanging ring is detachably connected to the hook installed on the waist beam.

[0010] Preferably, the axial angle between the basket bolt and the steel sleeve is 30-45°.

[0011] Preferably, four embedded bars are provided, with two respectively provided at the upper end and the lower end of the waist beam.

[0012] Preferably, one end of the embedded reinforcement passes through the steel sleeve and is implanted in the steel cage, wherein the other end of the embedded reinforcement extends into the later cast waist beam.

[0013] Preferably, the embedded reinforcement is HRB400 steel bar with a diameter of 20 mm, wherein the depth of the embedded reinforcement radially embedded in the steel sleeve is 450-600 mm, and the length of the embedded reinforcement extending to the waist beam is 600-700 mm.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model installs a detachable basket bolt between the steel sleeve bored pile and the concrete waist beam, thereby facilitating the increase of the overall stability of the steel sleeve bored pile, solving the connection problem between the waist beam and the steel sleeve bored pile and the inconvenient installation and removal of the steel sleeve bored pile and the waist beam suspension bar, facilitating the overall stress of the waist beam, the basket bolt and the steel sleeve bored pile to form a stress system, facilitating the construction of the bored pile and greatly improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 yes Figure 1 An enlarged schematic diagram of the structure at point A is shown.

[0017] Among them: 1. Steel sleeve; 2. Steel cage; 3. Waist beam; 4. Embedded reinforcement; 5. Basket bolt; 501. First adjusting rod; 502. Second adjusting rod; 503. Pull rod; 504. Hook; 505. Hanging ring; 6. Angle steel; 7. Mounting hole; 8. Lifting hook. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] Please refer to Figure 1 to Figure 2 To achieve the above purpose, the utility model provides the following technical solutions:

[0020] A steel sleeve bored pile fixing structure that is easy to disassemble and assemble comprises a steel sleeve 1, wherein a steel cage 2 is arranged in the inner cavity of the steel sleeve 1; concrete is poured in the inner cavity of the steel sleeve 1, wherein the steel cage 2 is embedded in the concrete; the axes of the steel cage 2 and the steel sleeve 1 coincide, and by pouring concrete into the steel sleeve 1, the steel cage 2 and the concrete are conveniently matched to increase the stability of the entire steel sleeve bored pile, and the foundation pit wall can be reasonably stabilized; a waist beam 3 is arranged in the middle of the outer side of the steel sleeve 1, wherein a plurality of embedded steel bars 4 are radially arranged at a position where the steel sleeve 1 is flush with the waist beam 3; there are four embedded steel bars 4, wherein the upper portion of the waist beam 3 is provided with a plurality of embedded steel bars 4; Two are respectively provided at the upper and lower ends; one end of the embedded rebar 4 passes through the steel sleeve 1 and is embedded in the steel cage 2, wherein the other end of the embedded rebar 4 extends to the post-cast waist beam 3; the embedded rebar 4 is HRB400 steel bar with a diameter of 20mm, wherein the depth of the embedded rebar 4 radially embedded in the steel sleeve 1 is 450-600mm, and the length of the embedded rebar 4 extending to the waist beam 3 is 600-700mm; a basket bolt 5 is obliquely provided on one side of the steel sleeve 2 close to the waist beam 3, wherein the upper end of the basket bolt 5 is connected to the steel sleeve 1, and the lower end of the basket bolt 5 is connected to the waist beam 3, and the axial angle between the basket bolt 5 and the steel sleeve 1 is 30-45°. By installing a removable basket bolt 5 between the steel sleeve 1 and the waist beam 3, the angle between the basket bolt 5 and the steel sleeve 1 can be adjusted according to actual fixing requirements, so as to improve the overall stability of the steel sleeve bored pile, facilitate the overall stress of the waist beam 3, the basket bolt 5 and the steel sleeve 1, form a force system, and facilitate the subsequent construction of the bored pile.

[0021] See also Figure 2 As an embodiment of the utility model, an angle steel 6 is welded on the upper side of the steel sleeve 1 close to the waist beam 3, wherein a mounting hole 7 is opened on the angle steel 6; a hook 8 is provided on the top of the waist beam 3, wherein the lower end of the hook 8 is welded to the transverse main reinforcement inside the waist beam 3; the basket bolt 5 includes a first adjusting rod 501, a second adjusting rod 502 and a pull rod 503, wherein nuts are respectively provided at both ends of the pull rod 503; one end of the first adjusting rod 501 is screwed with the nut at the upper end of the pull rod 503, wherein the other end of the first adjusting rod 501 is provided with a hook 504, and the hook 504 is detachably connected to the mounting hole 7 opened on the angle steel 6; one end of the second adjusting rod 502 is screwed with the nut at the lower end of the pull rod 503, wherein the other end of the second adjusting rod 502 is provided with a hanging ring 505, and the hanging ring 505 is detachably connected to the hook 8 installed on the waist beam 3.

[0022] In the above-described scheme, the hook 504 at the upper end of the first adjusting rod 501 is hung into the mounting hole 7 opened on the angle steel 6, and then the hanging ring 505 at the lower end of the second adjusting rod 502 is hung into the hook 8 provided on the waist beam 3, and then the pull rod 503 is rotated to drive the nuts at both ends of the pull rod 503 to rotate, so that the first adjusting rod 501 and the second adjusting rod 502 are contracted under the rotation of the pull rod 503, and the first adjusting rod 501 and the second adjusting rod 502 respectively form a force system with the angle steel 7 and the hook 8, so that the waist beam 3 and the basket bolt 5 and the steel sleeve 1 are subjected to force as a whole, the deformation of the foundation pit is controlled, and the subsequent construction of the steel sleeve bored pile is convenient; after the construction is completed, it is only necessary to rotate the pull rod 503 to control the first adjusting rod 501 and the second adjusting rod 502 to open, and remove the basket bolt 5, which is easy to use, solves the problem of inconvenient installation and removal of the steel sleeve 1 and the waist beam 3 suspension bar, and greatly improves work efficiency.

[0023] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications fall within the protection scope of the present invention.

Claims

1. A steel sleeve bored pile fixing structure that is easy to assemble and disassemble, comprising a steel sleeve (1), wherein a steel cage (2) is arranged in the inner cavity of the steel sleeve (1); characterized in that: The inner cavity of the steel sleeve (1) is poured with concrete, wherein the steel cage (2) is embedded in the concrete; a waist beam (3) is provided at the middle position of the outer side of the steel sleeve (1), wherein a plurality of embedded steel bars (4) are radially arranged at a position where the steel sleeve (1) is flush with the waist beam (3); a basket bolt (5) is obliquely provided on one side of the steel sleeve (1) close to the waist beam, wherein the upper end of the basket bolt (5) is connected to the steel sleeve (1), and the lower end of the basket bolt (5) is connected to the waist beam (3).

2. The steel sleeve bored pile fixing structure that is easy to assemble and disassemble according to claim 1 is characterized in that: An angle steel (6) is welded to the upper side of the steel sleeve (1) close to the waist beam (3), wherein a mounting hole (7) is provided on the angle steel (6).

3. The steel sleeve bored pile fixing structure that is easy to disassemble and assemble according to claim 1 is characterized in that: A hook (8) is provided at the top end of the waist beam (3), wherein the lower end of the hook (8) is welded to the transverse main reinforcement inside the waist beam (3).

4. The steel sleeve bored pile fixing structure that is easy to assemble and disassemble according to claim 1 is characterized in that: The basket bolt (5) includes a first adjusting rod (501), a second adjusting rod (502) and a pull rod (503), wherein nuts are respectively provided at both ends of the pull rod (503); one end of the first adjusting rod (501) is screwed with the nut at the upper end of the pull rod (503), wherein the other end of the first adjusting rod (501) is provided with a hook (504), and the hook (504) is detachably connected to the mounting hole (7) provided on the angle steel (6); one end of the second adjusting rod (502) is screwed with the nut at the lower end of the pull rod (503), wherein the other end of the second adjusting rod (502) is provided with a hanging ring (505), and the hanging ring (505) is detachably connected to the hook (8) installed on the waist beam (3).

5. The steel sleeve bored pile fixing structure that is easy to assemble and disassemble according to claim 1 is characterized in that: The axial angle between the turnbuckle bolt (5) and the steel sleeve (1) is 30-45°.

6. The steel sleeve bored pile fixing structure that is easy to disassemble and assemble according to claim 1 is characterized in that: The implanted bars (4) are provided with four bars, of which two bars are respectively provided at the upper end and the lower end of the waist beam (3).

7. The steel sleeve bored pile fixing structure that is easy to assemble and disassemble according to claim 6 is characterized in that: One end of the embedded reinforcement (4) passes through the steel sleeve (1) and is embedded in the steel cage (2), wherein the other end of the embedded reinforcement (4) extends into the waist beam (3).

8. The steel sleeve bored pile fixing structure that is easy to disassemble and assemble according to claim 7 is characterized in that: The embedded reinforcement (4) is a HRB400 steel bar with a diameter of 20 mm, wherein the embedded reinforcement (4) is radially embedded in the steel sleeve (1) to a depth of 450 to 600 mm, and the embedded reinforcement (4) extends to a length of 600 to 700 mm to the waist beam (3).

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