Detachable soil nail centering support for supporting engineering

Abstract

The utility model provides a detachable soil nail centering support for supporting engineering, and belongs to the technical field of building construction. According to the technical scheme, the centering device comprises a pair of centering nuts which are coaxially arranged, and a plurality of sets of supporting frames are evenly arranged between the two centering nuts. The soil nail centering support has the advantages that the soil nail centering support is integrally designed, the round hole allowing the soil nail to penetrate through is reserved in the middle of the centering support according to the diameter of the soil nail, field installation is facilitated, meanwhile, the centering support and the soil nail rod body are fixed on site conveniently through the fastening bolt, and the soil nail centering support is simple in structure and convenient to use. The centering support can be machined and customized before site construction, the site construction efficiency can be greatly improved, then the construction progress is accelerated, meanwhile, compared with a traditional construction scheme, the installation precision is obviously improved, and the construction quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a detachable soil nail centering bracket for support engineering. Background Technology

[0002] In foundation pit support engineering, soil nailing wall support is a commonly used support method. The general construction process of soil nailing is as follows: soil nail hole drilling → soil nail fabrication and installation → grouting. The soil nail rod is generally made of steel bars. Because the diameter of the soil nail hole is larger than the diameter of the soil nail rod, in order to ensure that the soil nail is centered in the soil nail hole after installation (meeting the requirements of stress and protective layer), the existing technical solution closest to this invention adopts the method of welding centering brackets on the soil nail rod: the centering brackets are made of 6mm or 8mm steel bars, with 3 support frames at each location, distributed at 120-degree angles to each other on the soil nail rod, and the support frames are welded to the soil nail rod.

[0003] However, this technical solution has many drawbacks:

[0004] 1. The bracket needs to be fabricated on-site, which increases the workload and time required.

[0005] 2. The brackets are installed manually onto the soil nailing rods. The installation angle and accuracy are controlled manually, which can easily lead to deviations.

[0006] 3. The support frame and soil nail rod are welded together. The welding process causes burns to the soil nail rod, affecting its mechanical properties. The extent of the impact cannot be assessed.

[0007] 4. The position of the bracket cannot be adjusted after welding.

[0008] To address the shortcomings of existing technologies, this utility model provides a detachable soil nailing centering bracket for support engineering, which solves the problems mentioned in the background art. Utility Model Content

[0009] The purpose of this utility model is to provide a simple and time-saving detachable soil nail centering bracket for support engineering.

[0010] This utility model is achieved through the following measures:

[0011] A detachable soil nail centering bracket for support engineering is characterized by comprising a pair of centering nuts arranged coaxially, and several sets of support frames evenly arranged between the two centering nuts. In use, the pair of centering nuts are inserted into the outer periphery of the soil nail rod, and the support frames abut against the inner wall of the hole drilled in the soil nail to achieve centering of the soil nail.

[0012] The specific features of this utility model also include:

[0013] The support frame is provided in three sets, and the included angle between the three sets of support frames is 120 degrees.

[0014] The two ends of the support frame are respectively welded to the outer surfaces of the corresponding centering nuts on both sides, and the middle part of the support frame is bent outward to form a protrusion that abuts against the inner wall of the soil nail hole.

[0015] The centering nut has a through threaded hole on its side, and a locking bolt is installed in the threaded hole. When the centering nut is fitted onto the soil nail rod, it is locked and fixed by the locking bolt.

[0016] The support frame includes a pair of fixed rods welded to the outer surfaces of the centering nuts on both sides. A middle rod is hinged to each of the fixed rods on both sides. A long support rod is provided between the two middle rods by a bolt structure. The support rod is provided with several sets of adjustment holes for adjustment and to cooperate with the corresponding bolts. Since the soil nail holes have different diameters, when using the centering bracket, the distance between the support rod and the soil nail bracket can be adjusted by adjusting the adjustment holes to adapt to different soil nail holes.

[0017] A second locking bolt is provided near the fixed rod on the intermediate rod. The second locking bolt passes through the intermediate rod and presses against the fixed rod. In use, first adjust the angle of the intermediate rod, then fix the intermediate rod with the second locking bolt, and then install the support rod between the two intermediate rods with bolts. The second locking bolt can prevent the device from becoming unstable.

[0018] The centering nut is a hexagonal nut. In this embodiment, the centering nut is a hexagonal head nut. The hole diameter should be adjusted according to the diameter of the soil nail rod. For easy installation, the hole diameter of the centering nut should be larger than the diameter of the soil nail rod by mm. At the same time, the hole diameter of the centering nut should not be too large to avoid the installation being unstable.

[0019] The installation steps for this centering bracket are as follows:

[0020] 1. Centering support processing: Select the centering nut according to the diameter of the soil nail rod, process the support frame according to the hole diameter of the soil nail and the outer diameter of the centering nut, and then weld it. The centering support is processed in the factory and used directly on site.

[0021] 2. Centering bracket installation: Fabricate the soil nail rods according to the design requirements, and mark the positions where the centering brackets need to be installed on the soil nail rods with chalk. Then, pass the centering brackets through the center holes of the soil nail rods and place them in the marked positions. After verifying that the positions are correct, install locking bolts on the sides of the two centering nuts. By rotating the locking bolts, the locking bolts will gradually tighten the soil nail rods to fix the centering brackets. If the position of the centering brackets needs to be adjusted after installation, loosen the locking bolts, adjust the position, and then tighten them again.

[0022] 3. Insert the soil nail rod with the centering support installed into the soil nail hole, and carry out subsequent grouting and other construction work.

[0023] The beneficial effects of this utility model are as follows:

[0024] 1. This invention does not require on-site processing; it can be pre-processed in the factory and used immediately upon on-site installation, greatly improving on-site construction efficiency.

[0025] 2. The three support frames of this invention are connected to hexagonal nuts at both ends, and the nut connection surfaces are at 120 degrees to each other, which just meets the installation angle requirements of the support frames and can improve construction accuracy.

[0026] 3. This invention avoids welding the support frame to the soil nail rod, thus mitigating the risk of damage to the soil nail rod caused by welding.

[0027] 4. This invention has a simple structure, is easy to install, and saves costs.

[0028] The original three support frames are integrated into one centering bracket and processed into a standardized product, avoiding the problems of labor-intensive and time-consuming processing and insufficient precision caused by on-site processing. At the same time, this centering bracket is not fixed to the soil nail rod by welding, but by fastening screws, which ensures that the installation is firm and can be disassembled, thereby improving on-site installation efficiency.

[0029] In summary, this application document adopts an integrated design for the soil nail centering bracket. A circular hole is left in the middle of the centering bracket according to the diameter of the soil nail so that the soil nail can pass through, which facilitates on-site installation. At the same time, the centering bracket and the soil nail rod are fastened with bolts, which facilitates on-site fixing. The centering bracket can be processed and customized before on-site construction, which can greatly improve on-site construction efficiency and thus speed up the construction progress. At the same time, the installation accuracy is significantly improved compared with the traditional construction method, ensuring the construction quality. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0031] Figure 2 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model.

[0032] Figure 3 for Figure 2 A magnified view of A in the middle.

[0033] The attached diagram is labeled as follows: 1. Support frame; 2. Soil nail rod; 3. Locking bolt one; 4. Centering nut; 5. Intermediate rod; 6. Adjustment hole; 7. Support rod; 8. Fixing rod; 9. Locking bolt two. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0037] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0038] See also Figures 1-3 A detachable soil nail centering bracket for support engineering includes a pair of centering nuts 4 arranged coaxially, and several sets of support frames 1 are evenly arranged between the two centering nuts 4. In use, the pair of centering nuts 4 are inserted into the outer periphery of the soil nail rod 2, and the support frames 1 abut against the inner wall of the soil nail hole to achieve centering of the soil nail.

[0039] The support frame 1 is provided in three sets, and the included angle between the three sets of support frames 1 is 120 degrees.

[0040] The two ends of the support frame 1 are welded to the outer surfaces of the corresponding centering nuts 4 on both sides, and the middle part of the support frame 1 is bent outward to form a protrusion that abuts against the inner wall of the soil nail hole.

[0041] The centering nut 4 has a through threaded hole on its side, and a matching locking bolt 3 is installed in the threaded hole. When the centering nut 4 is fitted onto the soil nail rod 2, it is locked and fixed by the locking bolt 3.

[0042] The support frame 1 includes a pair of fixing rods 8 welded to the outer surfaces of the centering nuts 4 on both sides. A middle rod 5 is hinged to each of the two fixing rods 8. A long support rod 7 is provided between the two middle rods 5 by a bolt structure. The support rod 7 is provided with several sets of adjustment holes 6 for adjustment and to cooperate with the corresponding bolts. Since the soil nail holes have different diameters, when using the centering support, the distance between the support rod 7 and the soil nail support can be adjusted by adjusting the adjustment holes 6 to adapt to different soil nail holes.

[0043] A locking bolt 29 is provided near the fixed rod 8 on the intermediate rod 5. The locking bolt 29 passes through the intermediate rod 5 and presses it against the fixed rod 8. In use, first adjust the angle of the intermediate rod 5, then fix the intermediate rod 5 with the locking bolt 29, and then install the support rod 7 between the two intermediate rods 5 with bolts. The locking bolt 29 can prevent the device from becoming unstable.

[0044] The centering nut 4 is a hexagonal head nut. In this embodiment, the centering nut 4 is a hexagonal head nut. The hole diameter should be adjusted according to the diameter of the soil nail rod. For easy installation, the hole diameter of the centering nut should be 5mm larger than the diameter of the soil nail rod. At the same time, the hole diameter of the centering nut should not be too large to avoid the installation and fixation being unstable.

[0045] The installation steps for this centering bracket are as follows:

[0046] 1. Centering bracket processing: Select centering nut 4 according to the diameter of soil nail rod 2, process support frame 1 according to the hole diameter of soil nail and the outer diameter of centering nut 4, and then weld it. The centering bracket is processed in the factory and used directly on site.

[0047] 2. Centering bracket installation: Fabricate the soil nail rods according to the design requirements, and mark the positions where the centering brackets need to be installed on the soil nail rods 2 with chalk. Then, pass the centering brackets through the center holes of the soil nail rods 2 and place them in the marked positions. After verifying that the positions are correct, install locking bolts 3 on the sides of the two centering nuts 4. By rotating the locking bolts 3, the locking bolts 3 will gradually tighten the soil nail rods 2, thereby fixing the centering brackets. After installation, if the position of the centering brackets needs to be adjusted, loosen the locking bolts 3, adjust the position, and then tighten them again.

[0048] 3. Insert the soil nail rod 2, with the centering support installed, into the soil nail hole, and carry out subsequent grouting and other construction work.

[0049] The technical features of this utility model not described can be implemented by or by using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this utility model, and this utility model is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model should also be within the protection scope of this utility model.

Claims

1. A detachable soil nailing centering bracket for support engineering, characterized in that, It includes a pair of centering nuts (4) arranged coaxially, and several sets of support frames (1) are evenly arranged between the two centering nuts (4); The support frame (1) is provided in three sets, and the included angle between the three sets of support frames (1) is 120 degrees; The support frame (1) includes a pair of fixing rods (8) respectively welded to the outer surfaces of the centering nuts (4) on both sides. A middle rod (5) is hinged to each of the fixing rods (8) on both sides. A long strip support rod (7) is provided between the middle rods (5) on both sides by a bolt structure. The support rod (7) is provided with a number of adjustment holes (6) for adjustment and cooperating with the corresponding bolts.

2. The detachable soil nailing centering bracket for support engineering according to claim 1, characterized in that, The two ends of the support frame (1) are respectively welded to the outer surfaces of the corresponding centering nuts (4) on both sides, and the middle part of the support frame (1) is bent outward to form a protrusion that abuts against the inner wall of the soil nail hole.

3. The detachable soil nailing centering bracket for support engineering according to claim 1, characterized in that, The centering nut (4) has a through threaded hole on its side, and a locking bolt (3) is provided in the threaded hole.

4. The detachable soil nail centering bracket for support engineering according to claim 1, characterized in that, A locking bolt 2 (9) is provided on the intermediate rod (5) near the fixed rod (8). The locking bolt 2 (9) passes through the intermediate rod (5) and presses against the fixed rod (8).

5. The detachable soil nailing centering bracket for support engineering according to claim 1, characterized in that, The centering nut (4) is a hexagonal head nut.

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