Anti-falling device for foundation pit box culvert construction

Abstract

An anti-falling device for foundation pit box culvert construction comprises protective railings, the protective railings are arranged on the ground on the left side and the right side of a foundation pit respectively, vertical rods are evenly distributed on the protective railings, the lower portions of the vertical rods are fixed to the ground, a front transverse rod and a rear transverse rod are arranged at the top between the vertical rods on the left side and the right side, and the two ends of each transverse rod are fixed to the vertical rods on the two sides. Vertical rods are arranged below the front cross rod and the rear cross rod respectively, and a transverse pull rod is arranged between the front vertical rod and the rear vertical rod. A protective barrier which must be arranged in foundation pit construction is used as a bearing support of the anti-falling device, and a bearing frame does not need to be additionally arranged; when a construction position is replaced, the anti-falling device can be moved only by being pulled out of a vertical rod of the protective barrier, and the anti-falling device is convenient and fast to use. The safety belt is hung on the pull rod and can horizontally move along the pull rod, so that the movable range after workers hang the safety belt is greatly enlarged, frequent hanging and taking are avoided, and safety and convenience are achieved.

Description

Technical Field

[0001] This utility model relates to a fall prevention device for foundation pit box culvert construction, belonging to the field of civil engineering. Background Technology

[0002] With the increasing emphasis placed on safety in construction companies, safety belts have become essential fall protection equipment for working at heights. However, in many construction environments, there is nowhere to hang the safety belts, especially for large concrete structures such as culverts or box culverts constructed in foundation pits. The height of the top of the culvert or box culvert is often 3 to 5 meters above the top of the foundation pit, which constitutes working at height and poses a risk of falling. There is nowhere to hang the safety belt to ensure that no fall injury occurs. Currently, on construction sites, the common practice is to hang the end of the safety belt at the worker's feet. Although this can help pull the worker back in case of a fall, it does not follow the rule of "hanging high and using low" for safety belts, and the fall still occurs, which is very unsafe. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of existing technologies and provide a safety belt suspension structure for workers working at heights in the construction of box culverts in foundation pits. This increases the range of movement for workers after suspending their safety belts, improves worker safety, and is a convenient anti-fall device for box culvert construction in foundation pits.

[0004] The technical solution of the anti-fall device for foundation pit box culvert construction of this utility model is as follows: it includes guardrails, which are respectively set on the ground on the left and right sides of the foundation pit. The guardrails are evenly distributed with uprights, the lower part of which is fixed to the ground. Two horizontal bars are set at the top between the uprights on the left and right sides, and the two ends of the horizontal bars are fixed to the uprights on both sides. A vertical bar is set under the two horizontal bars, and a horizontal tie rod is set between the two vertical bars.

[0005] Furthermore, the upright has a central hole, and the crossbar has downward-facing right-angle plugs at both ends, which are inserted into the central hole of the upright through the right-angle plugs.

[0006] Furthermore, hooks are provided at both ends of the plumb line.

[0007] Furthermore, the pull rod is provided with circular ring ends at both ends.

[0008] The beneficial effects of this utility model's anti-fall device for foundation pit box culvert construction are:

[0009] I. To solve the problem of where workers working at heights have nowhere to hang their safety belts when constructing large concrete structures such as box culverts in foundation pits;

[0010] 2. The guardrails that must be installed during the foundation pit construction can be used as the load-bearing supports for the fall protection device, and there is no need to set up a separate load-bearing frame.

[0011] Third, because the guardrail in the foundation pit is used as a load-bearing support, when changing the construction position, this fall protection device can be moved simply by pulling it out of the guardrail post, which is convenient and quick.

[0012] Fourth, the vertical bar is hung on the horizontal bar, so it can move horizontally along the horizontal bar. The safety belt is hung on the tie bar, so it can move horizontally along the tie bar. This greatly increases the range of movement of the worker after hanging the safety belt, avoids frequent hanging and taking, and is safe and convenient. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of a fall prevention device for foundation pit box culvert construction according to this utility model;

[0014] Figure 2 yes Figure 1 A schematic diagram of the cross-section along the A-A direction;

[0015] Figure 3 This is a structural diagram of the crossbar;

[0016] Figure 4 This is a schematic diagram of the plumb line structure;

[0017] Figure 5 This is a structural diagram of the tie rod.

[0018] In the diagram: 1. Guardrail; 2. Upright post; 3. Horizontal bar; 4. Vertical bar; 5. Tie bar; 6. Center hole; 7. Right-angle plug; 8. Hook; 9. Circular end; 10. Excavation pit; 11. Ground; 12. Box culvert. Detailed Implementation

[0019] This utility model relates to a fall prevention device for foundation pit box culvert construction, such as... Figure 1 — Figure 5 As shown, the guardrail includes a guardrail 1, which is respectively installed on the ground 11 on the left and right sides of the foundation pit 10. The guardrail 1 is evenly distributed with uprights 2, the lower part of the uprights 2 is fixed to the ground 11, and two horizontal bars 3 are installed at the top between the uprights 2 on the left and right sides. The two ends of the horizontal bars 3 are fixed to the uprights 2 on both sides. A vertical bar 4 is installed under the two horizontal bars 3, and a horizontal tie bar 5 is installed between the two vertical bars 4.

[0020] Furthermore, the upright 2 has a central hole 6, and the crossbar 3 has downward-facing right-angle plugs 7 at both ends, and the crossbar 3 is inserted into the central hole 6 of the upright 2 through the right-angle plugs 7.

[0021] Furthermore, hooks 8 are respectively provided at both ends of the vertical rod 4.

[0022] Furthermore, the pull rod 5 is provided with circular end caps 9 at both ends.

[0023] This utility model discloses a fall prevention device for foundation pit box culvert construction.

[0024] Step 1: Bend both ends of a steel bar into circular loops 9 to serve as tie rods 5;

[0025] Step 2: Bend both ends of a steel bar into hooks 8 to serve as plumb rods 4. Make two in total.

[0026] Step 3: Bend both ends of a steel bar into right-angle plugs 7 to serve as crossbars 3, and make two of them;

[0027] Step 4: Connect the circular end 9 of one end of the pull rod 5 to the hook 8 at the bottom of a vertical pipe 8, and connect the circular end 9 of the other end of the pull rod 5 to the hook 8 at the bottom of another vertical rod 8.

[0028] Step 5: Insert the right-angle plugs 7 at both ends of the horizontal bar 3 across the pit 10 and into the middle holes 6 of the uprights 2 on both sides of the pit 10. Repeat this step for the second horizontal bar 3 at a suitable distance from the guardrail uprights 1 above the working surface.

[0029] Step 6: Connect the vertical bar 4 and tie bar 5 together to the two horizontal bars 3, that is, use the hook 8 on the top of the vertical bar 4 to hang directly on the horizontal bar 3, thus forming the anti-fall device for the construction of the foundation pit box culvert.

[0030] When workers are working on top of the box culvert 12, they can attach their safety belts to the tie rod 5 of this device to prevent falls. When it is necessary to change the protected area, four workers can simultaneously pull the two horizontal bars 3 from the uprights 2 of the guardrail 1, move them to the construction area that needs protection, and then insert the right-angle plug 7 of the horizontal bar 3 into the middle hole 6 of the upright 2.

Claims

1. A fall prevention device for construction of a foundation pit box culvert, comprising guardrails (1), the guardrails being respectively installed on the ground (11) on the left and right sides of the foundation pit (10), the guardrails (1) being evenly distributed with uprights (2), the lower part of the uprights (2) being fixed to the ground (11), characterized in that: Two horizontal bars (3) are set at the top between the left and right uprights (2). The two ends of the horizontal bars (3) are fixed to the uprights (2) on both sides. A vertical bar (4) is set under the two horizontal bars (3) respectively, and a horizontal tie bar (5) is set between the two vertical bars (4).

2. The anti-fall device for foundation pit box culvert construction as described in claim 1, characterized in that: The upright (2) has a central hole (6), and the crossbar (3) has downward-facing right-angle plugs (7) at both ends. The crossbar (3) is inserted into the central hole (6) of the upright (2) through the right-angle plugs (7).

3. The anti-fall device for foundation pit box culvert construction as described in claim 1, characterized in that: The vertical rod (4) is provided with hooks (8) at both ends.

4. The anti-fall device for foundation pit box culvert construction as described in claim 1, characterized in that: The pull rod (5) is provided with circular end caps (9) at both ends.

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