Standardized protective railings and matching dismantling devices for foundation pit edges

Abstract

This utility model discloses a standardized protective railing for foundation pit edges and a matching dismantling device, belonging to the field of construction safety protection technology. The protective railing includes a railing frame and a base. The railing frame includes several evenly distributed support rods and railings located between the support rods. The number of bases is the same as the number of support rods and they are correspondingly arranged. The base includes a plug and a pre-embedded fixing plate. The bottom end of the plug is pointed, and the top end is concentrically welded to the pre-embedded fixing plate. A connecting plate is welded to the bottom end of each support rod. Bolt connection holes are respectively opened on the pre-embedded fixing plate and the connecting plate at corresponding positions. The bolt connection holes on the pre-embedded fixing plate are elongated holes. The protective railing structure designed by this utility model is simple and practical, with low application cost and convenient assembly and disassembly.

Description

Technical Field

[0001] This utility model belongs to the field of construction safety protection technology, specifically involving standardized protective railings for foundation pit edges and matching dismantling devices. Background Technology

[0002] In the early stages of building construction, foundation pit construction is an essential process. Excavation requires layered and segmented excavation, and perimeter protection work must be completed before excavation to prevent safety accidents. Installing edge guardrails is the most economical and practical protective measure. Existing foundation pit guardrails come in various types. For example, patent CN108277806B discloses a foundation pit guardrail. While this guardrail offers relatively convenient length adjustment, its structure is complex, its application cost is high, and it is inconvenient to assemble and disassemble. The base is directly set on the ground, resulting in insufficient stability, and long guardrails are prone to collapse. Patent CN115162838A discloses a safety guardrail for building foundation pit construction. This patent provides a safety guardrail with a counterweight fixed inside the fixed base to improve stability. However, this method is not conducive to quick assembly and disassembly, making relocation difficult and application inconvenient. Utility Model Content

[0003] The purpose of this utility model is to provide a standardized protective railing for the edge of a foundation pit and a matching dismantling device to solve the problem of poor application effect of existing protective railings disclosed in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a standardized protective railing for the edge of a foundation pit. The protective railing includes a railing frame and a base. The railing frame includes several evenly distributed support rods and railings located between the support rods. The number of bases is the same as the number of support rods and they are correspondingly arranged. The base includes a plug and a pre-embedded fixing plate. The bottom end of the plug is pointed, and the top end is concentrically welded to the pre-embedded fixing plate. A connecting plate is welded to the bottom end of the support rod. Bolt connection holes are respectively opened at corresponding positions on the pre-embedded fixing plate and the connecting plate. The bolt connection holes on the pre-embedded fixing plate are elongated holes.

[0005] Preferably, the plug is a galvanized steel pipe with a length of not less than 800 mm and a diameter of not less than 50 mm.

[0006] Preferably, a circular perforation is formed at the center of the pre-embedded fixing plate, the diameter of which is smaller than the diameter of the plug tube, and a short rod is radially welded to the inner side of the top end of the plug tube.

[0007] Preferably, the railing is a frame structure, with two sets of connecting ears at both ends of the support frame. The two sets of connecting ears are located near the upper and lower ends of the support frame, respectively. Correspondingly, two ear plates are welded to both sides of the support rod. The connecting ears and ear plates are respectively provided with circular rectangular mounting holes, and the length directions of the mounting holes are respectively set along the horizontal and vertical directions.

[0008] This utility model also provides a matching dismantling device for a standardized protective railing at the edge of a foundation pit. The matching dismantling device includes a support frame and a pressure rod. The bottom end of the support frame is a support plate, and the top end is provided with a U-shaped clamp. The top end of the U-shaped clamp has a hinge hole that penetrates both side plates. The front part of the pressure rod is connected to the hinge hole in the U-shaped clamp at the top of the support frame by a pin. The front end of the pressure rod is connected to a steel wire rope, and the bottom end of the steel wire rope is fixed with a hook. The height of the support frame is greater than the length of the plug of the standardized protective railing at the edge of the foundation pit as described above. The hook can pass through the circular perforation in the center of the pre-embedded fixing plate to hang the short rod.

[0009] Compared with the prior art, the advantages of the standardized protective railing for foundation pit edges and the matching dismantling device provided by this utility model are as follows:

[0010] 1. The base of the guardrail provided by this utility model is made of galvanized steel pipe with a length of not less than 800mm. When in use, the base can be directly inserted into the ground. The large insertion depth can provide sufficient support for the guardrail and ensure the stability of the guardrail after installation.

[0011] 2. The pre-embedded fixing plate of the base of the guardrail provided by this utility model has elongated bolt connection holes. When assembling with the support rod, it is convenient to adjust the position of the support rod. Even if there is a slight deviation in the installation position of the base, the position of the guardrail installed above can be adjusted to ensure the neatness and aesthetics of the guardrail after installation.

[0012] 3. The guardrail provided by this utility model has round rectangular mounting holes on the ear plate connecting the guardrail and the support rod. The length directions of the two mounting holes are different, so the installation position of the guardrail can be adjusted in the horizontal and vertical directions through the two mounting holes, which is convenient to use.

[0013] 4. This utility model also provides a matching dismantling device for the guardrail. By hooking the short rod at the top of the base tube body with the hook connected to the front end of the pressure rod, the base can be easily pulled out by pressing the rear end of the pressure rod, thus realizing the quick dismantling of the guardrail. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the standardized protective railing for the edge of the foundation pit according to this utility model;

[0015] Figure 2 This is a schematic diagram of the base of the standardized protective railing for the edge of the foundation pit according to this utility model;

[0016] Figure 3 This is a schematic diagram of the supporting dismantling device for the standardized protective railing at the edge of the foundation pit of this utility model.

[0017] In the diagram: 1. Base, 2. Guardrail frame, 11. Plug, 12. Embedded fixing plate, 13. Bolt connection hole, 14. Short pole, 21. Support rod, 22. Guardrail, 23. Connecting ear, 24. Ear plate, 25. Mounting hole, 31. Support frame, 32. Pressure rod, 33. Wire rope, 34. Hook, 35. U-shaped clamp, 36. Pin shaft, 37. Support plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0019] Please see Figure 1 , 2 As shown, this utility model provides an embodiment of a standardized protective railing for foundation pit edges. In this embodiment, the protective railing includes a railing frame 2 and a base 1. The railing frame 2 includes several evenly distributed support rods 21 and fence-like railings 22 located between adjacent support rods 21. The surfaces of the support rods 21 and railings 22 are respectively sprayed with warning colors. The number of bases 1 is the same as the number of support rods 21, and they are arranged in a one-to-one correspondence. The base 1 includes a plug 11 and a pre-embedded fixing plate 12. The plug 11 is a galvanized steel pipe with a length of not less than 800 mm and a diameter of not less than 50 mm. Its bottom end is beveled at 45° and pointed. The top end of the plug 11 is concentrically welded to the pre-embedded fixing plate 12. The pre-embedded fixing plate 12 is made of 5 mm thick steel plate and has a circular perforation at its center. The diameter of the circular perforation is smaller than the pipe diameter of the plug 11. A short rod 14 is radially welded to the inner side of the top end of the plug 11.

[0020] The bottom end of the support rod 21 of the guardrail frame 2 is welded with a connecting plate. The connecting plate and the pre-embedded fixing plate 12 are the same size and are also made of 5mm thick steel plate. There are 4 bolt connection holes 13 on each of the two corresponding positions. The 4 bolt connection holes 13 on the pre-embedded fixing plate 12 are elongated holes. The pre-embedded fixing plate 12 and the connecting plate are fastened together by bolts passing through the bolt connection holes. To ensure the stability of the connection, double-layer washers are set on the bolts.

[0021] The railing 22 is a frame structure, with two sets of connecting ears 23 welded to the left and right ends of its support frame. The two sets of connecting ears 23 are located near the upper and lower ends of the support frame, respectively. Correspondingly, two ear plates 24 are welded to both sides of the support rod 21. The connecting ears 23 and ear plates 24 are respectively provided with round rectangular mounting holes 25. The mounting holes 25 on the connecting ears 23 of the railing 22 are set horizontally, while the mounting holes 25 on the ear plates 24 of the support rod 21 are set vertically. The connecting ears 23 and the corresponding ear plates 24 are connected and fixed by bolts passing through the corresponding mounting holes 25. Example 2

[0022] like Figure 3 As shown, this utility model also provides a matching dismantling device for a standardized protective railing at the edge of a foundation pit. The dismantling device includes a support frame 31 and a pressure rod 32. A support plate 37 is concentrically welded to the bottom end of the support frame 31, and a U-shaped clamping plate 35 is welded to the top end. The top end of the U-shaped clamping plate 35 has a hinge hole that penetrates both side plates. The front part of the pressure rod 32 is connected to the hinge hole between the two side plates of the U-shaped clamping plate 35 at the top end of the support frame 31 by a pin 36. A steel wire rope 33 is fixedly connected to the front end of the pressure rod 32, and a hook 34 is fixed to the bottom end of the steel wire rope 33. The height of the support frame 31 is greater than the length of the plug 11 of the standardized protective railing at the edge of the foundation pit described in Embodiment 1. The hook 34 can pass through the circular through hole in the center of the pre-embedded fixing plate 12 to hook the short rod 14 at the top of the plug 11. By pressing the rear end of the pressure rod 32, the plug 11 can be pulled out from the ground by the steel wire rope and the hook 34.

[0023] In this embodiment, when setting up the standardized guardrail at the edge of the foundation pit, first mark the edge of the foundation pit where the guardrail is to be set, and mark the setting position of each base 1. Drive the plug 11 of the base 1 into the ground according to the marked point. The connecting bolt passes through the bolt connection hole 13 on the pre-embedded fixing plate 12 from bottom to top. When setting up the base 1, it is necessary to leave adjustment space for the connecting bolt on the bottom surface of the pre-embedded fixing plate 12. Then connect the support rod 21 of the guardrail frame 2. After adjusting the distance between adjacent support rods 21, drive the base 1 completely into the ground and tighten the connecting bolt. Finally, use bolts to connect and fasten the guardrail 22 between adjacent support rods 21 through the connecting ear 23 and ear plate 24.

[0024] When dismantling the guardrails, first remove the railings 22 of each guardrail frame 2, then remove the support rods 21 from the bases, and finally use the matching dismantling device provided in Embodiment 2 to pull out each base 1. When using the matching dismantling device, use the hook 34 to hang the short rod 14 at the top of the plug 11, and then press down hard on the rear end of the pressure rod 32. With the help of leverage, the plug 11 can be easily pulled out from the ground. The matching dismantling device only needs to pull most of the tube of the plug 11 out of the ground, and the remaining part can be directly pulled out by the operator by holding the top of the base 1.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A standardized protective railing for the edge of an excavation pit, characterized in that, The guardrail includes a guardrail frame and a base. The guardrail frame includes several evenly distributed support rods and railings located between the support rods. The number of bases is the same as the number of support rods and is correspondingly arranged. The base includes a plug and a pre-embedded fixing plate. The bottom end of the plug is pointed and the top end is concentrically welded to the pre-embedded fixing plate. The bottom end of the support rod is welded with a connecting plate. The pre-embedded fixing plate and the connecting plate are respectively provided with bolt connection holes at corresponding positions. The bolt connection holes on the pre-embedded fixing plate are elongated holes.

2. The standardized protective railing for the edge of the foundation pit according to claim 1, characterized in that: The plug is a galvanized steel pipe with a length of not less than 800 mm and a diameter of not less than 50 mm.

3. The standardized protective railing for the edge of the foundation pit according to claim 2, characterized in that: A circular perforation is opened at the center of the pre-embedded fixing plate. The diameter of the circular perforation is smaller than the diameter of the plug tube. A short rod is radially welded to the inner side of the top end of the plug tube.

4. The standardized protective railing for the edge of the foundation pit according to claim 3, characterized in that: The railing is a frame structure, with two sets of connecting ears at both ends of the support frame. The two sets of connecting ears are located near the upper and lower ends of the support frame, respectively. Correspondingly, two ear plates are welded to both sides of the support rod. The connecting ears and ear plates are respectively provided with circular rectangular mounting holes, and the length directions of the mounting holes are respectively set along the horizontal and vertical directions.

5. A matching dismantling device for standardized protective railings at the edge of foundation pits, characterized in that: The supporting dismantling device includes a support frame and a pressure rod. The bottom end of the support frame is a support plate, and the top end is provided with a U-shaped clamp. The top end of the U-shaped clamp has a hinge hole that penetrates both side plates. The front part of the pressure rod is connected to the hinge hole of the U-shaped clamp at the top of the support frame by a pin. The front end of the pressure rod is connected to a steel wire rope, and the bottom end of the steel wire rope is fixed with a hook. The height of the support frame is greater than the length of the plug of the standardized protective railing at the edge of the foundation pit as described in claim 4. The hook can pass through the circular perforation in the center of the pre-embedded fixing plate to hang the short rod.

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