A pile end post-grouting cast-in-place pile structure

Abstract

The utility model discloses a pile-end post-grouting cast-in-place pile structure, comprising a pile foundation, an outer shell being fixedly connected to the outer side of the upper surface of the pile foundation, a steel cage being fixedly connected to the upper surface of the pile foundation, the steel cage being located inside the outer shell, an intermediate steel bar being fixedly connected to the upper surface of the pile foundation, the intermediate steel bar being located at the inner center of the steel cage, a mounting tube being fixedly sleeved on the outer surface of the intermediate steel bar, a supporting plate being fixedly connected to the bottom of the mounting tube, a combination ring being slidably sleeved on the outer surface of the mounting tube, a tensioning tube being fixedly connected to the surface of one side of the combination ring, a threaded hole being provided inside one end of the tensioning tube, a tensioning threaded rod being threadedly installed inside the threaded hole, a tensioning threaded head being fixedly connected to one end of the tensioning threaded rod, which can be assembled and installed in a split manner for tensioning, and is conducive to layered arrangement, ensuring uniformity, avoiding local pressure concentration, improving safety and stability, and being conducive to construction and use.

Description

Technical Field

[0001] The utility model relates to the field of cast-in-place piles, and more specifically to a pile end post-grouting cast-in-place pile structure. Background Art

[0002] At present, in pile foundation construction, the method of post-grouting of cast-in-place piles is often used to improve the bearing capacity and pull-out resistance of the piles. The existing post-grouting cast-in-place pile construction method is to form a pile hole in the foundation soil by means of mechanical drilling, steel pipe squeezing or manual excavation, and place a steel cage in it and pour concrete to make a pile.

[0003] Authorization announcement No. CN 214530627 U discloses a post-grouting cast-in-place pile, which includes a main body structure, a steel cage and a casting pipe. The main body structure includes a casting hole, and a surrounding steel plate is arranged on the inner circumference of the casting hole; a plurality of ear plates are fixedly connected to the outer edge of the end face of the surrounding steel plate, and two ear plates are arranged as a group in an array on the end face of the surrounding steel plate around the central axis of the casting hole; a plurality of tracks are fixedly connected between each group of ear plates along the longitudinal direction of the inner circumference of the surrounding steel plate, the end face of the track is fixedly connected to the inner circumference of the surrounding steel plate, the end of the track away from the surrounding steel plate is arranged as an open structure, the tracks are grouped in pairs and are arranged opposite to each other on the inner wall of the surrounding steel plate; a plurality of sliders are arranged inside the track, and the sliders are provided with mounting grooves at the openings of the end faces of the tracks, and the size of the mounting grooves is the same as the size of the track openings.

[0004] In the above-mentioned disclosed structure, transverse tensioning bars are used to position and tighten the steel cage structure. The fixed angle and arrangement of the structure cannot adjust the tightening direction and position as needed, which easily causes misalignment interference and affects the alignment installation. It is also impossible to position in layers for uniform tightening, resulting in concentrated local pressure and poor tensile strength, which needs to be improved. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a pile end post-grouting cast-in-place pile structure, which can form an integrated structure by connecting the steel cage and the middle steel bars through the pile foundation, and connect the combined ring through the installation tube, so as to install the tensioning tube and the tensioning threaded rod, and install them on the steel cage in combination with the tensioning threaded head. The structure can be tightened by separate assembly installation, and is conducive to layered arrangement, ensuring uniformity, avoiding local pressure concentration, improving safety and stability, and facilitating construction and use.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A pile end post-grouting cast-in-place pile structure, comprising a pile foundation, an outer shell being fixedly connected to the outer side of the upper surface of the pile foundation, a steel cage being fixedly connected to the upper surface of the pile foundation, the steel cage being located inside the outer shell, an intermediate steel bar being fixedly connected to the upper surface of the pile foundation, the intermediate steel bar being located at the inner center of the steel cage, a mounting tube being fixedly sleeved on the outer surface of the intermediate steel bar, a support plate being fixedly connected to the bottom of the mounting tube, a combination ring being slidably sleeved on the outer surface of the mounting tube, the combination ring being stacked and connected to the upper surface of the support plate, a tensioning tube being fixedly connected to the surface of one side of the combination ring, a threaded hole being provided inside one end of the tensioning tube, a tensioning threaded rod being threadedly installed inside the thread of the threaded hole, a tensioning threaded head being fixedly connected to one end of the tensioning threaded rod, and the tensioning threaded head being fixedly installed on one side of the steel cage.

[0008] Furthermore, one end of the tensioning thread head is fixedly connected to a limiting block, and the limiting block is tightly connected to the inner side of the steel cage.

[0009] Furthermore, one end of the tensioning threaded head is sleeved with a combined pad, and the combined pad is pressed and connected to the outer surface of the steel cage.

[0010] Furthermore, a locking nut is threadedly installed at one end of the tightening thread head, and the locking nut is pressed and connected to one side of the combined pad. The limit block is connected by the tightening thread head. Combined with the combined pad and the locking nut, the joint can be locked and fixed after positioning, which is convenient for combined installation and tightening.

[0011] Furthermore, a countersunk hole is provided on one end surface of the mounting tube, and a positioning screw is installed on the internal thread of the countersunk hole.

[0012] Furthermore, the positioning screws are located at two sides of the installation tube, and the positioning screws are tightly connected to the outer surface of the middle steel bar.

[0013] Furthermore, the installation tube has three layers and is connected to the outer surface of the middle steel bar at equal intervals. It can be locked and fixed by connecting positioning screws through countersunk holes, and will not interfere with the combination ring sleeve, making it easy to install and use.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] (1) This scheme connects the steel cage and the middle steel bar through the pile foundation to form an integrated structure, and connects the combined ring through the installation tube to install the tensioning tube and the tensioning threaded rod, which are installed on the steel cage in combination with the tensioning threaded head. The steel cage can be installed in a split combination for tensioning, and is conducive to layered arrangement, ensuring uniformity, avoiding local pressure concentration, improving safety and stability, and facilitating construction and use.

[0016] (2) By tightening the threaded head to connect the limit block, combined with the combination pad and the locking nut, it can be locked and fixed after positioning, which is convenient for combined installation and tightening.

[0017] (3) The positioning screws can be connected through the countersunk holes to lock the installation and fix it without interfering with the combined ring sleeve, making it easy to install and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a partial schematic diagram of the installation tube connection of the utility model;

[0020] Figure 3 It is a partial structural diagram of the tightening thread head connection of the utility model;

[0021] Figure 4 It is a partial structural diagram of the positioning screw connection of the utility model.

[0022] Description of the numbers in the figure:

[0023] 1 pile foundation, 11 outer shell, 12 steel cage, 13 middle steel bar, 14 installation tube, 15 support plate, 16 combination ring, 17 tensioning tube, 18 threaded hole, 19 tensioning threaded rod, 2 tensioning threaded head, 21 limit block, 22 combination pad, 23 locking nut, 24 countersunk hole, 25 positioning screw. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0025] Example 1

[0026] See also Figure 1 , Figure 2 and Figure 3A pile end post-grouting cast-in-place pile structure comprises a pile foundation 1, an outer shell 11 is fixedly connected to the outer side of the upper surface of the pile foundation 1, a steel cage 12 is fixedly connected to the upper surface of the pile foundation 1, the steel cage 12 is located inside the outer shell 11, an intermediate steel bar 13 is fixedly connected to the upper surface of the pile foundation 1, the intermediate steel bar 13 is located at the inner center of the steel cage 12, a mounting tube 14 is fixedly sleeved on the outer surface of the intermediate steel bar 13, a support plate 15 is fixedly connected to the bottom of the mounting tube 14, a combination ring 16 is slidably sleeved on the outer surface of the mounting tube 14, the combination ring 16 is stacked and connected to the upper surface of the support plate 15, a tensioning tube 17 is fixedly connected to the surface of one side of the combination ring 16, a threaded hole 18 is provided inside one end of the tensioning tube 17, a tensioning threaded rod 19 is installed with the internal thread of the threaded hole 18, a tensioning threaded head 2 is fixedly connected to one end of the tensioning threaded rod 19, and the tensioning threaded head 2 is fixedly installed on one side of the steel cage 12.

[0027] One end of the tensioning thread head 2 is fixedly connected to the limiting block 21, and the limiting block 21 is tightly connected to the inner side of the steel cage 12. One end of the tensioning thread head 2 is sleeved with a combination pad 22, and the combination pad 22 is tightly connected to the outer surface of the steel cage 12. One end of the tensioning thread head 2 is threadedly installed with a locking nut 23, and the locking nut 23 is tightly connected to one side of the combination pad 22. By connecting the limiting block with the tensioning thread head, combining the combination pad and the locking nut, it can be locked and fixed after positioning, which is convenient for combined installation and tightening. During installation, the installation tube 14 can be sleeved on the middle steel bar 13, and can be installed in layers. , and then the combination ring 16 is put on the installation tube 14, which can be installed in a stacked manner and positioned on the support plate 15, and the combination ring 16 can be rotated to adjust the direction, and multiple tensioning tubes 17 can be adjusted to different angles to avoid mutual interference, which is conducive to precise alignment installation, and then the tensioning threaded rod 19 can be rotated to adjust the length, and the tensioning threaded head 2 can be inserted into the interior of the steel cage 12 and penetrated to the outside, and then the combination pad 22 is connected from the outside and then the locking nut 23 is connected to lock the fixed position, so as to tighten and fix, facilitate uniform tightening at multiple points, improve strength and stability, and facilitate combined use.

[0028] Example 2

[0029] See also Figure 1 , Figure 2 and Figure 4A pile end post-grouting cast-in-place pile structure comprises a pile foundation 1, an outer shell 11 is fixedly connected to the outer side of the upper surface of the pile foundation 1, a steel cage 12 is fixedly connected to the upper surface of the pile foundation 1, the steel cage 12 is located inside the outer shell 11, an intermediate steel bar 13 is fixedly connected to the upper surface of the pile foundation 1, the intermediate steel bar 13 is located at the inner center of the steel cage 12, a mounting tube 14 is fixedly sleeved on the outer surface of the intermediate steel bar 13, a support plate 15 is fixedly connected to the bottom of the mounting tube 14, a combination ring 16 is slidably sleeved on the outer surface of the mounting tube 14, the combination ring 16 is stacked and connected to the upper surface of the support plate 15, a tensioning tube 17 is fixedly connected to the surface of one side of the combination ring 16, a threaded hole 18 is provided inside one end of the tensioning tube 17, a tensioning threaded rod 19 is installed with the internal thread of the threaded hole 18, a tensioning threaded head 2 is fixedly connected to one end of the tensioning threaded rod 19, and the tensioning threaded head 2 is fixedly installed on one side of the steel cage 12.

[0030] A countersunk hole 24 is provided on one end surface of the mounting tube 14, and a positioning screw 25 is installed on the internal thread of the countersunk hole 24. The positioning screws 25 are located on both sides of the mounting tube 14, and the positioning screws 25 are tightly connected to the outer surface of the middle steel bar 13. The mounting tube 14 has three layers, and is connected to the outer surface of the middle steel bar 13 at equal intervals. The positioning screws are connected through the countersunk hole, which can be locked and fixed, and will not interfere with the combination ring sleeve connection, which is convenient for installation and use. After the mounting tube 14 is sleeved and installed, the positioning screws 25 can be tightened with a tool to tighten the positioning screws 25, so as to tighten the connection to the middle steel bar 13 to avoid loosening, which is convenient for installation and use.

[0031] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A pile post-grouting cast-in-place pile structure, comprising a pile foundation (1), an outer shell (11) is fixedly connected to the outer side of the upper surface of the pile foundation (1), and a steel cage (12) is fixedly connected to the upper surface of the pile foundation (1), characterized in that: The steel cage (12) is located inside the outer shell (11); the upper surface of the pile foundation (1) is fixedly connected with an intermediate steel bar (13); the intermediate steel bar (13) is located at the inner center of the steel cage (12); the outer surface of the intermediate steel bar (13) is fixedly sleeved with a mounting tube (14); the bottom of the mounting tube (14) is fixedly connected with a support plate (15); the outer surface of the mounting tube (14) is slidably sleeved with a combination ring (16); the combination ring (16) is stacked and connected to the upper surface of the support plate (15); one side surface of the combination ring (16) is fixedly connected with a tensioning tube (17); a threaded hole (18) is provided inside one end of the tensioning tube (17); a tensioning threaded rod (19) is threadedly installed inside the threaded hole (18); one end of the tensioning threaded rod (19) is fixedly connected with a tensioning threaded head (2); the tensioning threaded head (2) is fixedly installed on one side of the steel cage (12).

2. A pile tip post-grouting cast-in-place pile structure according to claim 1, characterized in that: One end of the tightening threaded head (2) is fixedly connected to a limiting block (21), and the limiting block (21) is tightly connected to the inner side of the steel cage (12).

3. The pile tip post-grouting cast-in-place pile structure according to claim 1, characterized in that: One end of the tensioning threaded head (2) is sleeved with a combined pad (22), and the combined pad (22) is tightly connected to the outer surface of the steel cage (12).

4. The pile tip post-grouting cast-in-place pile structure according to claim 1, characterized in that: A locking nut (23) is threadedly mounted on one end of the tightening threaded head (2), and the locking nut (23) is pressed and connected to one side of the combined pad (22).

5. The pile tip post-grouting cast-in-place pile structure according to claim 1, characterized in that: A countersunk hole (24) is provided on one end surface of the installation cylinder (14), and a positioning screw (25) is installed on the internal thread of the countersunk hole (24).

6. A pile tip post-grouting cast-in-place pile structure according to claim 5, characterized in that: The positioning screws (25) are located at two sides of the installation tube (14), and the positioning screws (25) are tightly connected to the outer surface of the middle steel bar (13).

7. The pile tip post-grouting cast-in-place pile structure according to claim 1, characterized in that: The installation tube (14) has three layers and is connected to the outer surface of the middle steel bar (13) at equal intervals.

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