A dewatering wellbore fall arrest net installation construction structure

Abstract

The application discloses a drainage well shaft anti-falling net installation construction structure, which comprises a construction structure capable of realizing inclination of the anti-falling net to a ladder. When sundries on the anti-falling net need to be collected to the side of the ladder, the end portion of a pull rope at the top of the well shaft is pulled, the middle portion of the pull rope changes direction by a pulley and pulls the bottom of the anti-falling net to be inclined to the ladder, at this time, the legs of an operator are stepped on the ladder as a force point, and the sundries are cleaned, thereby solving the problem that the operator needs to take the ladder as a force point and the sundries far from the ladder are inconvenient to clean.

Description

Technical Field

[0001] This utility model relates to an installation and construction structure for an anti-fall net in a drainage well, belonging to the field of drainage well construction technology. Background Technology

[0002] When urban drainage systems undergo pipeline construction and renovation, in order to cope with the increased drainage demand, it is necessary to rebuild the manholes connecting the new drainage pipes. Before the manhole covers are installed after the manholes are built, anti-fall nets must be installed on the manholes for protection.

[0003] The existing technology for installing fall protection nets in well shafts is described in Chinese Patent Publication No. CN208121814U. Although it discloses that the hook on the well base 1 is connected to the fall protection net to achieve the installation of the fall protection net, when there are debris on the fall protection net that needs to be cleaned, the workers need to use the ladder as the force point, and it is inconvenient to clean up debris that is far away from the ladder. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model provides an installation and construction structure for a drainage well anti-fall net.

[0005] This utility model is achieved through the following technical solution.

[0006] This utility model provides a construction structure for installing a fall-prevention net in a drainage well, comprising: A construction structure that allows the fall protection net to tilt towards the ladder.

[0007] The well shaft serves as the load-bearing foundation for the installation of the fall protection net; It also includes fall protection nets and ropes that pull the fall protection nets toward the ladder.

[0008] The inner wall of the well is pre-embedded with ladders, which are multiple ladders distributed at intervals. The multiple ladders are arranged in a vertical linear array at different axial heights on the inner wall of the well. The inner wall of the well shaft has a cement mortar plaster layer to smooth and polish the inner wall.

[0009] The top opening of the well shaft is pre-embedded with hook bolts, the hook ends of which extend into the well shaft. There are multiple hook bolts, which are distributed in a circumferential array on the inner wall surface at the same height as the top opening of the well shaft. It also includes a fall protection net, with multiple hanging points on the outer periphery of the fall protection net hooked and connected to the hook ends of the multiple hook bolts for stress.

[0010] The fall protection net is a flexible and deformable woven mesh.

[0011] It also includes a pull rope that pulls the fall protection net toward the ladder. One end of the pull rope is tied and fixed to the bottom of the fall protection net near the ladder. The pull rope is wound around a pulley, which is rotatably mounted on the ladder in the middle of the shaft. The other end of the pull rope is tied and fixed to the ladder at the top of the shaft.

[0012] The well shaft and the cement mortar plaster layer are topped with a well base, and there is a sidewalk structure on the outside of the well base.

[0013] The pedestrian walkway structure includes a compacted road base layer at the bottom, which is compacted on the site's rock and soil layers. On the compacted road base layer, a crushed stone cushion layer, a permeable concrete layer, a dry-hardened cement mortar layer, and a permeable brick layer are constructed in sequence.

[0014] The beneficial effects of this utility model are as follows: When there are debris on the fall protection net that needs to be collected towards the ladder side, pull the end of the pull rope at the top of the well shaft, so that the middle of the pull rope changes direction through the pulley and pulls the bottom of the fall protection net towards the ladder. At this time, it is convenient for the workers to step on the ladder as the force point to clean up the debris. This solves the problem that the workers need to use the ladder as the force point and it is inconvenient to clean up the debris that is far away from the ladder. Attached Figure Description

[0015] Fig. 1 This is a schematic diagram of the main cross-sectional structure of this utility model; Fig. 2 This is a top view of the present invention; In the diagram: 1-Manhole shaft; 11-Cement mortar plaster layer; 2-Ladder; 3-Hook bolt; 4-Anti-fall net; 5-Guide rope; 6-Manhole base; 7-Sidewalk structure; 71-Compacted road base; 72-Crushed stone subbase; 73-Permeable concrete layer; 74-Dry hard cement mortar layer; 75-Permeable brick layer. Detailed Implementation

[0016] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0017] like Figs. 1-2 As shown.

[0018] This application discloses a construction structure for installing a fall-prevention net in a drainage well, comprising: The well shaft 1 is constructed by concrete and brick masonry, and serves as the load-bearing foundation for the installation of the fall protection net 4. The inner wall of the well shaft 1 has a cement mortar plaster layer 11, which smooths and polishes the inner wall of the well shaft 1.

[0019] The inner wall of the well shaft 1 is pre-embedded with ladders 2. There are multiple ladders 2 distributed at intervals. The multiple ladders 2 are arranged in a vertical linear array at different axial heights on the inner wall of the well shaft 1, so that people can climb in and out of the well shaft 1 by climbing multiple ladders 2.

[0020] The top opening of the well shaft 1 is pre-embedded with hook bolts 3, the hook ends of which extend into the well shaft 1. Multiple hook bolts 3 are arranged in a circumferential array on the inner wall surface of the top opening of the well shaft 1 at the same height. The well shaft 1 also includes a fall arrest net 4, with multiple hook points on its outer periphery connected to the hook ends of the multiple hook bolts 3 for stress application. The fall arrest net 4 is a flexible, deformable woven mesh.

[0021] It also includes a pull rope 5 that pulls the fall protection net 4 towards the ladder 2. One end of the pull rope 5 is tied and fixed to the bottom of the fall protection net 4 near the ladder 2. The pull rope 5 is wound and installed on a pulley. The pulley can rotate and roll on the ladder 2 located in the middle of the shaft 1. The other end of the pull rope 5 is tied and fixed to the ladder 2 located at the top opening of the shaft 1.

[0022] When debris on the fall arrest net 4 needs to be collected towards the ladder 2, pull the end of the rope 5 at the top of the shaft 1. This causes the middle of the rope 5 to be pulled in a different direction by a pulley, causing the bottom of the fall arrest net 4 to tilt towards the ladder 2. This makes it easier for workers to step on the ladder 5 as a support point to clear the debris. This solves the problem that workers need to use the ladder as a support point and it is inconvenient to clear debris that is far away from the ladder.

[0023] During routine debris collection, the pull rope 5 can be pulled to tilt the bottom of the fall protection net 4 toward the ladder 2, allowing the debris to be collected and gathered in one place. After pulling the rope 5, wrap it around the ladder 2 at the top opening of the well shaft 1 several times, and then tie it in place to ensure that the fall protection net 4 remains tilted toward the ladder 2 for a long time.

[0024] A manhole base 6 is placed on top of the manhole shaft 1 and the cement mortar plaster layer 11, and a sidewalk structure 7 is located outside the manhole base 6. The sidewalk structure 7 includes a compacted road base 71 at the bottom, which is compacted and constructed on the site's rock and soil layers. A crushed stone cushion layer 72, a permeable concrete layer 73, a dry-hardened cement mortar layer 74, and a permeable brick layer 75 are constructed sequentially on the compacted road base 71. The permeable brick layer 75 is constructed on the permeable concrete layer 73 through the dry-hardened cement mortar layer 74.

Claims

1. A construction structure for installing a fall-prevention net in a drainage well shaft, characterized in that, include: A construction structure that allows the fall protection net (4) to tilt towards the ladder (2); The well shaft (1) serves as the load-bearing foundation for the installation of the fall protection net (4); It also includes a fall protection net (4) and a pull rope (5) that pulls the fall protection net (4) toward the ladder (2); The top opening of the well shaft (1) is pre-embedded with hook bolts (3), the hook ends of the hook bolts (3) extend into the well shaft (1), there are multiple hook bolts (3), and the multiple hook bolts (3) are distributed in a circumferential array at intervals on the inner wall surface of the top opening of the well shaft (1) at the same height; it also includes a fall protection net (4), and multiple hanging points on the outer periphery of the fall protection net (4) are hooked and connected to the hook ends of the multiple hook bolts (3) to bear force.

2. The installation and construction structure for the anti-fall net in the drainage well shaft as described in claim 1, characterized in that: The inner wall of the well shaft (1) is pre-embedded with ladders (2), which are multiple ladders (2) distributed at intervals. The multiple ladders (2) are arranged in a vertical linear interval array at different axial heights on the inner wall of the well shaft (1).

3. The installation and construction structure for the anti-fall net in the drainage well shaft as described in claim 2, characterized in that: The inner wall of the well shaft (1) is covered with a cement mortar plaster layer (11) to smooth and polish the inner wall of the well shaft (1).

4. The installation and construction structure for the anti-fall net in the drainage well shaft as described in claim 1, characterized in that: The fall protection net (4) is a flexible and deformable woven net.

5. The installation and construction structure for the anti-fall net in the drainage well shaft as described in claim 1, characterized in that: One end of the pull rope (5) is tied and fixed to the bottom of the fall protection net (4) near the ladder (2). The pull rope (5) is wound and installed on the pulley, which is rotatably and rollingly installed on the ladder (2) in the middle of the shaft (1). The other end of the pull rope (5) is tied and fixed to the ladder (2) at the top opening of the shaft (1).

6. The installation and construction structure for the anti-fall net in the drainage well shaft as described in claim 3, characterized in that: A well base (6) is placed on top of the well shaft (1) and the cement mortar plaster layer (11), and a sidewalk structure (7) is located on the outside of the well base (6).

7. The installation and construction structure for the anti-fall net in the drainage well shaft as described in claim 6, characterized in that: The pedestrian walkway structure (7) includes a compacted road base (71) at the bottom, which is compacted on the rock and soil layer on site. A crushed stone cushion layer (72), a permeable concrete layer (73), a dry hard cement mortar layer (74) and a permeable brick layer (75) are constructed on the compacted road base (71) in sequence.

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