Guardrail for supporting foundation pit

Abstract

The utility model discloses a guardrail for supporting a foundation pit, relates to the field of buildings, in particular to a fence, and solves the problems that an existing guardrail for supporting the foundation pit is poor in stability and prone to toppling over. According to the technical scheme, the guardrail for foundation pit supporting comprises two supporting columns and a supporting frame between the two supporting columns, anchoring structures are arranged at the lower ends of the supporting columns, the two opposite sides of the supporting frame are rotationally connected to the supporting columns respectively, a protective net is arranged in the supporting frame, a reinforcing plate is arranged on the back face of the protective net, and the reinforcing plate is connected with the supporting columns. A back face connecting base is fixedly installed on the face, back to the protective net, of the reinforcing plate, the upper end of the inclined supporting rod is rotationally connected to the back face connecting base, the length of the inclined supporting rod can be adjusted, the inclined supporting rod can be locked after being adjusted, the lower end of the inclined supporting rod is rotationally connected with a fixing base, and the fixing base is provided with a fixing structure. The device is used for being fixedly installed on the ground around a foundation pit, prevents soil, stones and the like from falling into the foundation pit, and also has a warning protection function.

Description

Technical Field

[0001] This utility model relates to the field of buildings, and more particularly to a fence, specifically a guardrail for foundation pit support. Background Technology

[0002] Pit support railings are used to prevent soil, rocks, and other debris from falling into the pit, providing a safe and stable working environment for construction workers. Pit support railings consist of fixed support posts and a protective netting installed between the support posts. The netting is typically made of high-strength, corrosion-resistant woven wire. Under severe weather conditions such as strong winds and heavy rain, the netting may be subjected to significant wind and dynamic loads. Strong impacts can cause it to break through. Since the netting relies entirely on the support posts for stability, insufficient stability in both the netting and the support posts can lead to collapse and render the railing ineffective.

[0003] To improve the stability of guardrails, diagonal braces can be added to the support posts. For example, patent CN216740956U discloses an edge guardrail including a wire mesh frame and support posts. Wire mesh is welded and fixed inside the wire mesh frame, and the support posts are welded and fixed to the wire mesh frame. Diagonal braces are provided on the sides of the support posts. The combination of the support posts and diagonal braces provides stable support for the entire guardrail. However, if the wire mesh frame is welded and fixed to the support posts, the wire mesh is easily punctured after a strong impact, and the wire mesh frame can easily detach from the support posts. Furthermore, the lower end of the diagonal braces is not fixed to the ground, and due to the inherent instability of the diagonal braces, their effect on improving the stability of the support posts is weak, making the entire edge guardrail prone to tipping over and falling. Additionally, the length of the diagonal braces is not adjustable, making them inconvenient to store and unable to adapt well to different terrain conditions.

[0004] For example, patent CN 221194548 U discloses a protective railing for foundation pit construction, including a main body of the protective railing and a first upright fixedly installed on one side of the main body of the protective railing. A second upright is fixedly installed on the other side of the main body of the protective railing. The main body of the protective railing includes a guardrail frame and a bottom sealing plate fixedly installed at the bottom of the guardrail frame. A grid frame is fixedly installed on the surface of the guardrail frame, and a counterweight grid plate is fixedly installed at the bottom of the back of the bottom sealing plate. Reinforcing diagonal braces are fixedly installed between the counterweight grid plate and the guardrail frame. In use, the main body of the protective railing is placed on the ground outside the foundation pit, and then sandbags are piled on the counterweight grid plate to press and fix the counterweight grid plate. The counterweight grid is not fixed to the ground, but is secured using sandbags. Sandbags are not effective at securing the guardrail, cannot adapt to uneven ground, and pose a risk of the guardrail tipping over and the sandbags and guardrail falling into the pit. The counterweight grid and reinforcing braces are fixed in place, making them inconvenient to store. The upper end of the reinforcing braces is connected to the guardrail frame, and the reinforcing braces do not provide sufficient support for the grid frame. The iron mesh may be punctured after a strong impact. Utility Model Content

[0005] This utility model provides a guardrail for foundation pit support, which solves the problem of poor stability and easy collapse of existing foundation pit support guardrails.

[0006] The technical solution adopted by this utility model is as follows: a guardrail for foundation pit support, comprising two support columns and a support frame installed between the two support columns. The lower end of the support column is provided with an anchoring structure. The support frame is a rectangular frame, with opposite sides of the support frame rotatably connected to the support columns. The rotation axis of the support frame is parallel to the center line of the support column. A protective net is provided inside the support frame. A reinforcing plate is provided on the back of the protective net. Both ends of the reinforcing plate are fixedly connected to the support frame. A back connecting seat is fixedly installed on the side of the reinforcing plate facing away from the protective net. The upper end of the diagonal brace is rotatably connected to the back connecting seat. The rotation axis of the diagonal brace around the back connecting seat is parallel to the plane corresponding to the support frame and perpendicular to the center line of the support column. The length of the diagonal brace is adjustable and can be locked after adjustment. The lower end of the diagonal brace is rotatably connected to a fixing seat. The fixing seat is perpendicular to the center line of the support column around the rotation axis of the diagonal brace. The fixing seat is provided with a fixing structure.

[0007] The anchoring structure at the lower end of the support column is used to fix the lower end of the support column to the ground. Specifically, the lower end of the support column is fixedly connected to an anchor plate, which has fixing holes; or, the lower end of the support column is provided with a fixing cone.

[0008] The support frame is rotatably connected to the support column. To facilitate a quick and stable connection between the support frame and the support column, a side connecting seat is provided on the side of the support column, and a connecting ear that matches the side connecting seat is provided on the side of the support frame. The connecting ear of the support frame is located inside the side connecting seat of the support column and is rotatably connected by a connecting shaft that passes through the side connecting seat and the connecting ear.

[0009] To facilitate the installation of side connection seats on the surface of the support column, the support column is further provided with the following: the cross-section of the support column is rectangular, and at least two side connection seats are provided on one side of the support column, or at least two side connection seats are provided on two opposite sides of the support column, or at least two side connection seats are provided on two adjacent sides of the support column.

[0010] The length of the diagonal brace is adjustable and can be locked after adjustment, allowing the diagonal brace to form different inclination angles according to actual needs. Specifically: the diagonal brace includes an outer rod and an inner rod inserted into the outer rod. The upper end of the outer rod is connected to the back connecting seat, and the lower end of the inner rod is connected to the fixed seat. The insert sections of the inner rod and the outer rod are staggered with connecting holes and connected by connecting bolts.

[0011] To further prevent excessive sliding between the inner and outer rods, a matching limiting groove and a limiting block are provided between the inner and outer rods.

[0012] The back of the support frame can have only one diagonal brace or multiple braces. To further improve the support and tension fixation of the braces on the reinforcing plate, the back of the support frame has at least two diagonal braces. Each diagonal brace is connected by a connecting rod to form a diagonal bracing frame. The fixing seats at the lower ends of each diagonal brace are collinear around the rotation axis of the diagonal brace and are connected by a fixing plate. The fixing plate is provided with fixing holes or anchoring cones.

[0013] When multiple diagonal braces are installed on the back of the support frame, in order to better improve the strength of the support frame and control the total mass of the support frame and the bracing, the support frame is further provided with at least two bracing plates spaced apart. The center lines of each bracing plate are parallel to each other along the length direction and parallel to the center line of the support column. A back connecting seat is provided on the back of each bracing plate and connected to the diagonal bracing.

[0014] To make the guardrails for foundation pit support have a clear warning effect, a further step is to fix reflective warning stickers on the front of the support frame.

[0015] To make the guardrails for foundation pit support have a clear warning effect, a further step is to install warning lights at the top of the support columns.

[0016] The beneficial effects of this utility model are as follows: The lower end of the support column is equipped with an anchoring structure, which allows the support column to be fixedly installed on the ground. The centerline of the support column is generally vertical. A reinforcing plate is provided on the back of the protective net, and both ends of the reinforcing plate are fixedly connected to the support frame. The reinforcing plate improves the structural strength of the support frame and also provides auxiliary support and fixation for the protective net, making it less susceptible to penetration and more stable and safer. A diagonal brace is provided on the side of the reinforcing plate facing away from the protective net. After the lower end of the diagonal brace is fixed to the ground through the fixing structure of the fixing seat, the diagonal brace provides both support and tension fixation for the reinforcing plate, ensuring the stability of the reinforcing plate and the support frame and preventing the guardrail from tipping over. The upper end of the diagonal brace is rotatably connected to the back connecting seat, and the length of the diagonal brace is adjustable for easy storage. Attached Figure Description

[0017] Figure 1 This is a front view of one embodiment of the guardrail for foundation pit support of this utility model.

[0018] Figure 2 yes Figure 1 Rear view of the embodiment shown.

[0019] Figure 3 yes Figure 2 A sectional view of the vertical plane containing the diagonal brace.

[0020] Figure 4 This is a rear view of another embodiment of the guardrail for foundation pit support of this utility model.

[0021] Attached reference numerals: 1. Support column; 2. Support frame; 3. Protective net; 4. Reinforcing plate; 5. Rear connecting seat; 6. Diagonal brace; 6-1. Outer rod; 6-2. Inner rod; 6-3. Connecting bolt; 7. Fixing seat; 8. Anchor plate; 9. Fixing cone; 10. Side connecting seat; 11. Connecting lug; 12. Connecting shaft; 13. Connecting rod; 14. Fixing plate; 14-1. Fixing hole; 14-2. Anchoring cone; 15. Reflective warning sticker; 16. Warning light. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] This utility model relates to a guardrail for foundation pit support, which is used to fix and install on the ground around the foundation pit to prevent soil, stones, etc. from falling into the pit, and also serves as a warning and protective function. Figures 1-4 As shown, the pit support railing includes two support columns 1 and a support frame 2 installed between the two support columns 1. The support columns 1 are generally made of metal, such as steel pipe columns. An anchoring structure is provided at the lower end of the support column 1 to securely fix the lower end of the support column 1 to the ground. The anchor plate 8 is generally a steel plate and is welded and fixed to the lower end of the support column 1. For example, see... Figures 1-3 The lower end of the support column 1 is fixedly connected to an anchor plate 8. The anchor plate 8 has fixing holes, through which rivets, screws, or other fasteners are inserted and driven into the ground to fix the anchor plate 8. Alternatively, the anchor plate 8 can be fixed using anchor bolts. For another example, see... Figure 4 The lower end of the support column 1 is equipped with a fixing cone 9, which is conical or pyramidal in shape. The fixing cone 9 and the support column 1 are integral, or the fixing cone 9 is fixedly connected to the lower end of the support column 1. When the support column 1 is fixed to the ground by the fixing cone 9, a limiting ring can also be fixedly installed at the lower end of the support column 1, which serves both as a limiting function and to improve the stability of the support column 1. In order to make the guardrail for foundation pit support have a clear warning effect, a warning light 16 can also be installed at the upper end of the support column 1, for example, the warning light 16 is a solar-powered warning light.

[0024] The support frame 2 is a rectangular frame, typically made of metal pipes. A protective mesh 3, usually made of wire mesh or steel wire mesh, is installed inside the support frame 2. The protective mesh 3 is also rectangular and fixedly connected to the support frame 2 on all four sides. The opposite sides of the support frame 2 are rotatably connected to the support column 1. The rotation axis of the support frame 2 is parallel to the center line of the support column 1, meaning the axis of rotation of the support frame 2 relative to the support column 1 is parallel to the center line of the support column 1. The support frame 2 can be rotatably connected via hinges. Another rotatable connection method for quick installation is provided below. For example... Figures 1-4A side connecting seat 10 is provided on the side of the support column 1. The side connecting seat 10 is fixed to the side of the support column 1, for example, by welding. The side of the support frame 2 is provided with a connecting ear 11 that is adapted to the side connecting seat 10. The connecting ear 11 of the support frame 2 is located inside the side connecting seat 10 of the support column 1 and is rotatably connected by a connecting shaft 12 that passes through the side connecting seat 10 and the connecting ear 11. At least two connection points are provided between a support column 1 and the support frame 2, and the rotation axes of the two connection points are collinear.

[0025] Guardrails for foundation pit support are generally arranged in a straight line, and at the corners of the foundation pit, they are arranged at right angles. To facilitate the installation of side connecting seats 10 on the surface of the support column 1, the support column 1 has a rectangular cross-section, and at least two side connecting seats 10 are provided on one side of the support column 1. This support column 1 is suitable as a support column 1 at the end position; or, at least two side connecting seats 10 are provided on each of the two opposite sides of the support column 1. This support column 1 is suitable as a support column 1 in the middle of the guardrail arranged in a straight line; or, at least two side connecting seats 10 are provided on each of the two adjacent sides of the support column 1. This support column 1 is suitable as a support column 1 at the corner of the guardrail.

[0026] A protective net 3 is installed inside the support frame 2. The side of the support frame 2 closest to the ground is most likely to be impacted; therefore, the width of this side is greater than the width of the other three sides. To ensure the pit support railing has a clearly visible warning effect, reflective warning stickers 15 are fixed to the front of the support frame 2. For example, the reflective warning stickers 15 are placed on the lower edge of the front of the support frame 2. Figure 1 As shown. The reflective warning sticker 15 can prevent pedestrians or vehicles from accidentally hitting the guardrail frame 2 when the light is dim.

[0027] A reinforcing plate 4 is provided on the back of the protective net 3, that is, the side of the protective net 3 closest to the foundation pit is equipped with a reinforcing plate 4. Both ends of the reinforcing plate 4 are fixedly connected to the support frame 2, for example, by welding. The reinforcing plate 4 provides auxiliary support and fixation for the protective net 3, making it less susceptible to penetration and ensuring its stability and safety. There may be one or more reinforcing plates 4. When there are multiple reinforcing plates 4, they are generally arranged at equal intervals, for example, between the two long sides of the rectangle corresponding to the support frame 2. A back-side connecting seat 5 is fixedly installed on the side of the reinforcing plate 4 facing away from the protective net 3, and the upper end of the diagonal brace 6 is rotatably connected to the back-side connecting seat 5. The diagonal brace 6 can rotate around the back-side connecting seat 5. The direction of rotation of the diagonal brace 6 around the back-side connecting seat 5 is parallel to the plane corresponding to the support frame 2 and perpendicular to the centerline of the support column 1, allowing the diagonal brace 6 to rotate to a state where it is tightly pressed against the back of the support frame 2. Figures 2-4As shown. The lower end of the diagonal brace 6 is rotatably connected to the fixing seat 7. The fixing seat 7 is perpendicular to the center line of the support column 1 in the direction of rotation around the axis of rotation of the diagonal brace 6. The fixing seat 7 is provided with a fixing structure. The fixing seat 7 is used to fix the lower end of the diagonal brace 6 to the ground. The fixing seat 7 can rotate around the lower end of the diagonal brace 6 to ensure that the fixing seat 7 can be in contact with the ground. For example, the fixing seat 7 is provided with fixing holes 14-1. Rivets, screws or other fasteners are inserted into fixing holes 14-1 and driven into the ground to fix the fixing seat 7, or the fixing seat 7 is fixed by anchor bolts. As another example, the fixing seat 7 is provided with anchoring cones 14-2. The anchoring cones 14-2 are conical or pyramidal in shape. The anchoring cones 14-2 are driven directly into the ground to fix the lower end of the diagonal brace 6.

[0028] The length of the diagonal brace 6 is adjustable and can be locked after adjustment. That is, the length of the diagonal brace 6 can not only be adjusted, but also remains fixed after adjustment, allowing the diagonal brace 6 to form different inclination angles. For example, see... Figures 2-4 The diagonal brace 6 includes an outer rod 6-1 and an inner rod 6-2 inserted into the outer rod 6-1. The upper end of the outer rod 6-1 is connected to the rear connecting seat 5, and the lower end of the inner rod 6-2 is connected to the fixing seat 7. The insert sections of the inner rod 6-2 and the outer rod 6-1 are staggered and connected by connecting bolts 6-3. The inner rod 6-2 and the outer rod 6-1 have different total lengths, and the connecting bolts 6-3 are connected to different connecting holes to lock the inner rod 6-2 and the outer rod 6-1. To prevent excessive sliding of the inner rod 6-2 and the outer rod 6-1, mutually adaptable limiting grooves and limiting blocks can also be provided between the inner rod 6-2 and the outer rod 6-1.

[0029] The diagonal brace 6 on the back of the support frame 2 can be a single rod or multiple rods. To improve the support and tension fixing effect of the diagonal brace 6 on the reinforcing plate 4, multiple diagonal braces 6 are generally provided. To further improve the support and tension fixing effect of the diagonal brace 6 on the reinforcing plate 4, there are at least two diagonal braces 6 on the back of the support frame 2, i.e., multiple diagonal braces 6 are provided. Each diagonal brace 6 is connected by a connecting rod 13 to form a diagonal bracing frame. Simultaneously, the fixing seats 7 at the lower ends of each diagonal brace 6 are collinear around the rotation axis of the diagonal brace 6 and connected by a fixing plate 14. That is, the fixing plate 14 connects each fixing seat 7 into a whole, and each fixing seat 7 can rotate. The fixing plate 14 is provided with fixing holes 14-1 or anchoring cones 14-2. Both fixing holes 14-1 and anchoring cones 14-2 are used to fix each fixing seat 7 to the ground. For example, in... Figures 2-4In the illustrated embodiment, the support frame 2 is provided with two reinforcing plates 4 spaced apart. The centerlines of the two reinforcing plates 4 are parallel to each other along their length and are also parallel to the centerline of the support column 1. Each reinforcing plate 4 has a back connecting seat 5 on its back side, which connects to a diagonal brace 6. When multiple diagonal braces 6 are provided on the back side of the support frame 2, in order to better improve the strength of the support frame 2 and control the total mass of the support frame 2 and the reinforcing plates 4, the number of reinforcing plates 4 is preferably consistent with the number of diagonal braces 6 and corresponds one-to-one. There are multiple reinforcing plates 4, and the centerlines of each reinforcing plate 4 are parallel to each other along their length and are also parallel to the centerline of the support column 1. Each reinforcing plate 4 has a back connecting seat 5 on its back side, which connects to a diagonal brace 6.

Claims

1. A guardrail for foundation pit support, comprising two support columns (1) and a support frame (2) installed between the two support columns (1), wherein the lower end of the support column (1) is provided with an anchoring structure, the support frame (2) is a rectangular frame, and the opposite sides of the support frame (2) are rotatably connected to the support column (1), the rotation axis of the support frame (2) is parallel to the center line of the support column (1), and a protective net (3) is provided inside the support frame (2), characterized in that: The back of the protective net (3) is provided with a reinforcing plate (4). The two ends of the reinforcing plate (4) are fixedly connected to the support frame (2). The side of the reinforcing plate (4) facing away from the protective net (3) is fixedly installed with a back connecting seat (5). The upper end of the diagonal brace (6) is rotatably connected to the back connecting seat (5). The direction of the diagonal brace (6) around the rotation axis of the back connecting seat (5) is parallel to the plane corresponding to the support frame (2) and perpendicular to the center line of the support column (1). The length of the diagonal brace (6) can be adjusted and locked after the length is adjusted. The lower end of the diagonal brace (6) is rotatably connected to a fixing seat (7). The direction of the fixing seat (7) around the rotation axis of the diagonal brace (6) is perpendicular to the center line of the support column (1). The fixing seat (7) is provided with a fixing structure.

2. The guardrail for foundation pit support as described in claim 1, characterized in that: The lower end of the support column (1) is fixedly connected to the anchor plate (8), and the anchor plate (8) is provided with fixing holes; or, the lower end of the support column (1) is provided with a fixing cone (9).

3. The guardrail for foundation pit support as described in claim 1, characterized in that: A side connecting seat (10) is provided on the side of the support column (1), and a connecting ear (11) adapted to the side connecting seat (10) is provided on the side of the support frame (2). The connecting ear (11) of the support frame (2) is located inside the side connecting seat (10) of the support column (1) and is rotatably connected by a connecting shaft (12) that passes through the side connecting seat (10) and the connecting ear (11).

4. The guardrail for foundation pit support as described in claim 3, characterized in that: The support column (1) has a rectangular cross-section. At least two side connecting seats (10) are provided on one side of the support column (1), or at least two side connecting seats (10) are provided on two opposite sides of the support column (1), or at least two side connecting seats (10) are provided on two adjacent sides of the support column (1).

5. The guardrail for foundation pit support as described in claim 1, characterized in that: The diagonal brace (6) includes an outer rod (6-1) and an inner rod (6-2) inserted into the outer rod (6-1). The upper end of the outer rod (6-1) is connected to the back connecting seat (5), and the lower end of the inner rod (6-2) is connected to the fixing seat (7). The inner rod (6-2) and the outer rod (6-1) are provided with staggered connecting holes and connected by connecting bolts (6-3).

6. The guardrail for foundation pit support as described in claim 5, characterized in that: The inner rod (6-2) and the outer rod (6-1) are provided with mutually compatible limiting grooves and limiting blocks.

7. The guardrail for foundation pit support as described in any one of claims 1 to 6, characterized in that: There are at least two diagonal braces (6) on the back of the support frame (2). Each diagonal brace (6) is connected by a connecting rod (13) to form a diagonal brace frame. The fixing seats (7) at the lower end of each diagonal brace (6) are collinear around the rotation axis of the diagonal brace (6) and connected by a fixing plate (14). The fixing plate (14) is provided with fixing holes (14-1) or anchoring cones (14-2).

8. The guardrail for foundation pit support as described in claim 7, characterized in that: The support frame (2) is provided with at least two reinforcing plates (4) at intervals. The center lines of each reinforcing plate (4) are parallel to each other along the length direction and are parallel to the center line of the support column (1). A back connecting seat (5) is provided on the back of each reinforcing plate (4) and connected to the diagonal brace (6).

9. The guardrail for foundation pit support as described in any one of claims 1 to 6, characterized in that: A reflective warning sticker (15) is fixed to the front of the support frame (2).

10. The guardrail for foundation pit support as described in any one of claims 1 to 6, characterized in that: A warning light (16) is provided at the upper end of the support column (1).

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