A method for constructing a movable horizontal safety net for a tensioned arch spatial triangular truss.

Abstract

This invention discloses a method for constructing a movable horizontal safety net for a tensioned arch spatial triangular truss, comprising the following steps: Step 1, setting up steel wire safety ropes; Step 2, fabricating the safety net; Step 3, installing the safety net; Step 4, sliding the safety net; and Step 5, reusing the safety net. This method achieves the following benefits: 1. Cost savings: The horizontal net and frame can be fabricated on the ground, reducing the investment in high-altitude machinery, making the process more logical, and allowing for repeated use, significantly reducing costs compared to fully laying the horizontal net; 2. Convenience and speed: It solves the problem of the crane boom being unable to extend across the span after the horizontal net is installed, and the reasonable movement of the horizontal net ensures both safety and improves construction efficiency; 3. Safety and reliability: The safety net can be moved according to changes in the construction position via fixed pulleys, providing a large coverage area, improved stability, and ensuring construction safety.

Description

Technical Field

[0001] This invention belongs to the field of steel structure construction, and specifically relates to a method for constructing a movable horizontal safety net for a tensioned arch spatial triangular truss. Background Technology

[0002] Tensioned arch spatial triangular trusses are widely used in steel structure buildings, often in the construction of steel structures such as coal sheds. Their overall cross-sectional shape is arched and has a bottom chord at the middle and bottom. The cross-section of the truss is triangular rather than rectangular.

[0003] High-altitude operations after truss installation are the most crucial part. After the existing truss is in place, purlins need to be installed. The safety net currently used has the same structure as conventional trusses, which is a horizontal net fully laid in the middle of the truss height. On the one hand, the construction cost is high and the construction period is long. On the other hand, it causes the problem that the boom of the truck crane cannot extend to work across the span, which increases the difficulty of construction. Summary of the Invention

[0004] This invention provides a method for constructing a movable horizontal safety net for a tensioned arch spatial triangular truss. This method addresses the technical problems of current safety nets, which have the same structure as conventional trusses and are laid horizontally across the middle of the truss height. These problems result in high construction costs, long construction periods, and difficulties in extending the boom of a truck crane across the span, thus increasing the difficulty of construction.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a method for constructing a movable horizontal safety net for a tensioned arch spatial triangular truss, comprising the following steps:

[0006] Step 1: Set up the steel wire safety rope;

[0007] Several parallel steel wire safety ropes are installed at intervals along the length of the tensioned arch spatial triangular tube truss. The direction of the steel wire safety ropes is perpendicular to the length of the tensioned arch spatial triangular tube truss. The horizontal steel wire safety rope is tensioned below the lower chord in the middle of the tensioned arch spatial triangular tube truss. One end of the steel wire safety rope is fixed to the arc-shaped node below the lower chord with a U-shaped clip. The other end of the steel wire safety rope passes through the arc-shaped node at the same height on the opposite side and turns to the column base of the tensioned arch spatial triangular tube truss on that side. A safety collar is fixed on the column base. The steel wire safety rope is fixed to the safety collar with a U-shaped clip. Four fixed pulleys are installed on the steel wire safety rope through rope sleeves. Two of the fixed pulleys are located at both ends of the horizontal section of the steel wire safety rope, and the other two are located in the middle of the horizontal section of the steel wire safety rope.

[0008] Step 2: Safety net fabrication;

[0009] The safety net is made on the ground and includes a rectangular steel wire rope frame and a safety net inside the rectangular steel wire rope frame. Anti-detachment spring buckles are fixed on the outside of the steel wire rope frame. The length of the steel wire rope frame is such that the anti-detachment spring buckles on both sides are respectively fastened to the steel wire safety ropes on both sides. Steel wire traction ropes are welded to the four corners of the steel wire rope frame.

[0010] Step 3: Installation of the safety net;

[0011] After the safety net frame is made, a truck crane is used to hoist the safety net. Two safety nets are installed between the two steel wire safety ropes. The two safety nets are installed on both sides of the middle of the horizontal section of the steel wire safety rope. The installers use a ladder truck to reach one side of the safety net and hang the anti-detachment spring buckles on the steel wire safety rope point by point. After all this is done, the truck crane can release the hook.

[0012] Step 4: Slide the safety net.

[0013] The installers use a ladder truck to pass the steel wire rope of the safety net through the fixed pulleys at the corresponding corners and then turn it downwards. The ground personnel pull the steel wire rope to pull the safety net directly below the workers to prevent falls. After pulling it into place, the steel wire rope is temporarily fixed to the ground with counterweights or angle iron anchors to prevent the safety net from moving around randomly.

[0014] Step 5: Safe net turnover;

[0015] Safety ropes are installed in advance for the next installation span. After the safety net of the completed span is removed, it can be installed in the next installation span. Specifically, the dismantling personnel reach the binding point of the safety net using a ladder truck, and bind the steel wire rope of the truck crane to the safety net frame. The truck crane starts to lift the hook, and the dismantling personnel use the ladder truck to reach the anti-detachment hook node on the short side of the safety net. The anti-detachment hook is removed from the safety rope at each point, and the truck crane lifts the safety net to the next span. The above installation process is repeated to install the safety net.

[0016] By adopting the above technical solution, this construction method provides a unique safety net structure and a sliding component for the safety net. Two independent safety nets are cleverly arranged on the left and right sides of each span. The anti-detachment spring buckles on both sides of the safety net, in coordination with the steel wire safety rope, ensure stable installation. Furthermore, the steel wire traction rope and the fixed pulleys on the steel wire safety rope work together to achieve sliding, thus forming a completely new and unique construction method for a movable horizontal safety net. This achieves the following: 1. Cost savings: The horizontal net and frame can be fabricated on the ground, reducing the investment in high-altitude work machinery, making the process connection more reasonable, and allowing for recycling. 1. Significantly reduces costs compared to fully covering the horizontal net; 2. Convenient and quick: Solves the problem that the crane boom cannot extend out of the span after the horizontal net is installed, and allows for reasonable movement of the horizontal net, ensuring both safety and improving construction efficiency; 3. Safe and reliable: The safety net can be moved according to the construction position through fixed pulleys, covering a large area and improving stability, ensuring construction safety. It solves the technical problem that the current safety net has the same structure as the conventional truss, which is fully covered in the middle of the truss height, resulting in high construction costs and long construction period, and also causing the crane boom to be unable to extend out of the span, thus increasing the construction difficulty.

[0017] Preferably, in step one, the steel wire safety rope is 2m below the middle lower chord of the tensioned arch space triangular tube truss.

[0018] By adopting the above technical solutions, a good protective effect can be achieved.

[0019] Preferably, in step one, an intermediate support rod is fixed at the bottom end of the lower chord in the middle of the tensioned arch space triangular tube truss, and an intermediate rope loop is fixed at the bottom end of the intermediate support rod, with a steel wire safety rope passing through the intermediate rope loop.

[0020] By adopting the above technical solution, the middle support was cleverly implemented, ensuring the stability of the steel wire safety rope.

[0021] Preferably, in step one, the steel wire safety rope is tensioned by a 2-ton chain hoist before it is fixed to the bottom of the column.

[0022] By adopting the above technical solution, the tension of the steel wire safety rope is guaranteed.

[0023] Preferably, in step two, two longitudinal beams are also provided on the inner side of the safety net frame.

[0024] By adopting the above technical solutions, the safety net has good structural strength. The specifications and materials of the safety net itself can be determined according to the installation specifications, which will not be elaborated here.

[0025] Preferably, the safety net has a specification of 6m*15.5m, and the wire rope frame is made of φ12mm wire rope.

[0026] By adopting the above technical solution, the dimensions are reasonable and effective protection can be provided.

[0027] Preferably, a steel pipe is fitted over the wire rope frame, with a safety net hanging ring welded to the inside of the steel pipe and an anti-detachment spring buckle welded to the outside of the steel pipe.

[0028] By adopting the above technical solution, the installation of the safety net can ensure the position of the steel pipe is fixed, thereby ensuring the fixation of the anti-loosening spring buckle.

[0029] The beneficial effects of this invention are as follows: This construction method provides a unique safety net structure and a sliding component for the safety net. Two independent safety nets are cleverly arranged for each span. The anti-detachment spring buckles on both sides of the safety net, in coordination with the steel wire safety rope, ensure stable installation. Furthermore, the traction rope and the fixed pulleys on the steel wire safety rope work together to achieve sliding, thus forming a completely new and unique construction method for a movable horizontal safety net. This achieves the following: 1. Cost savings: The horizontal net and net frame can be fabricated on the ground, reducing the investment in high-altitude work machinery, making the process connection more reasonable, and allowing for recycling. 1. Significantly reduces costs compared to fully covering the horizontal net; 2. Convenient and quick: Solves the problem that the crane boom cannot extend out of the span after the horizontal net is installed, and allows for reasonable movement of the horizontal net, ensuring both safety and improving construction efficiency; 3. Safe and reliable: The safety net can be moved according to the construction position through fixed pulleys, covering a large area and improving stability, ensuring construction safety. It solves the technical problem that the current safety net has the same structure as the conventional truss, which is fully covered in the middle of the truss height, resulting in high construction costs and long construction period, and also causing the crane boom to be unable to extend out of the span, thus increasing the construction difficulty.

[0030] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention; the main objects and other advantages of the invention may be realized and obtained by means of the embodiments particularly pointed out in the description. Attached Figure Description

[0031] Figure 1 This is a side view schematic diagram of the structure according to an embodiment of the present invention;

[0032] Figure 2 This is a top view schematic diagram of the structure of an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of the safety net according to an embodiment of the present invention;

[0034] Figure 4 This is an installation diagram of the anti-detachment spring buckle of the safety net according to an embodiment of the present invention;

[0035] Figure 5This is a schematic diagram of the intermediate support rod in an embodiment of the present invention;

[0036] Figure 6 This is a structural installation effect diagram of an embodiment of the present invention.

[0037] Attached reference numerals: 1. Tensed arch space triangular tube truss; 2. Steel wire safety rope; 3. Lower chord; 4. Column base; 5. Fixed pulley; 6. Safety net; 7. Steel wire rope frame; 8. Safety net; 9. Anti-detachment spring buckle; 10. Steel wire traction rope; 11. Intermediate support rod; 12. Intermediate rope loop; 13. Longitudinal beam; 14. Steel pipe; 15. Safety net hanging ring. Detailed Implementation

[0038] The technical solutions of the present invention will be described in detail below through embodiments. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solutions of the present invention, and should not be construed as limiting the technical solutions of the present invention.

[0039] Combination Figure 1-5 A method for constructing a movable horizontal safety net for a tensioned arch spatial triangular truss includes the following steps:

[0040] Step 1: Set up the steel wire safety rope 2;

[0041] Several parallel steel wire safety ropes 2 are arranged at intervals along the length of the tensioned arch spatial triangular tube truss 1. The direction of the steel wire safety ropes 2 is perpendicular to the length of the tensioned arch spatial triangular tube truss 1. The horizontal steel wire safety ropes 2 are tensioned below the lower chord 3 in the middle of the tensioned arch spatial triangular tube truss 1. One end of the steel wire safety rope 2 is fixed to the arc-shaped node below the lower chord 3 by a U-shaped clip. The other end of the steel wire safety rope 2 passes through the arc-shaped node at the same height on the opposite side and turns to the column base 4 of the tensioned arch spatial triangular tube truss 1 on that side. A safety collar is fixed on the column base 4. The steel wire safety rope 2 is fixed to the safety collar by a U-shaped clip. Four fixed pulleys 5 are installed on the steel wire safety rope 2 by rope sleeves. Two of the fixed pulleys 5 are located at both ends of the horizontal section of the steel wire safety rope 2, and the other two fixed pulleys 5 are located in the middle of the horizontal section of the steel wire safety rope 2.

[0042] Step 2: Construction of safety net 6;

[0043] Safety net 6 is made on the ground, including a rectangular steel wire rope frame 7 and a safety net 8 inside the rectangular steel wire rope frame 7. Anti-detachment spring buckles 9 are fixed on the outside of the steel wire rope frame 7. The length of the steel wire rope frame 7 is such that the anti-detachment spring buckles 9 on both sides are respectively fastened to the steel wire safety ropes 2 on both sides. Steel wire traction ropes 10 are welded to the four corners of the steel wire rope frame 7 respectively.

[0044] Step 3: Install safety net 6;

[0045] After the safety net 6 frame is made, a truck crane is used to hoist the safety net 6. Two safety nets 6 are installed between the two steel wire safety ropes 2. The two safety nets 6 are installed on both sides of the middle of the horizontal section near the steel wire safety rope 2. The installers use a ladder truck to reach one side of the safety net 6 and hang the anti-detachment spring buckle 9 on the steel wire safety rope 2 point by point. After all this is done, the truck crane can release the hook.

[0046] Step 4: Slide the safety net 6.

[0047] The installers use a climbing vehicle to pass the steel wire traction rope 10 of the safety net 6 through the fixed pulley 5 at the corresponding corner and then turn it downwards. The ground personnel pull the steel wire traction rope 10 to pull the safety net 6 directly below the workers to prevent falls. After pulling it into place, the steel wire traction rope is temporarily fixed to the ground with counterweights or angle steel anchors to prevent the safety net 6 from moving around randomly.

[0048] Step 5: Safety net rotates 6 times;

[0049] Safety ropes are installed in advance in the next installation span. After the safety net 6 in the completed span is removed, it can be installed in the next installation span. Specifically, the dismantling personnel reach the binding point of the safety net 6 via a ladder truck, and tie the hoisting wire rope of the truck crane to the frame of the safety net 6. The truck crane starts to lift the hook, and the dismantling personnel go to the anti-detachment hook node on the short side of the safety net 6 via the ladder truck. The anti-detachment hook is removed from the safety rope at each point. The truck crane lifts the safety net 6 to the next span, and the above installation process is repeated to install the safety net 6.

[0050] This construction method provides a unique safety net structure 6 and a sliding component for the safety net 6. Two safety nets 6 are cleverly arranged on the left and right sides of each span for independent use. The anti-detachment spring buckles 9 on both sides of the safety net 6 work in coordination with the steel wire safety rope 2 to ensure stable installation. Furthermore, the traction rope works in coordination with the fixed pulleys 5 on the steel wire safety rope 2 to achieve sliding, thus forming a new and unique construction method for a movable horizontal safety net 8. This achieves the following: 1. Cost savings: The horizontal net and frame can be fabricated on the ground, reducing the investment in high-altitude machinery; the process connections are more reasonable; and it can be reused, compared to full-laying... 1. Horizontal netting significantly reduces costs; 2. Convenient and quick: It solves the problem that the crane boom cannot extend across the span after the horizontal netting is installed. Reasonable movement of the horizontal netting ensures both safety and improves construction efficiency; 3. Safe and reliable: The safety netting can be moved according to the construction position through the fixed pulleys 5 and 8, with a large coverage area and improved stability, ensuring construction safety. It solves the technical problem that the current safety netting 8 has the same structure as the conventional truss, which is to fully lay the horizontal netting in the middle of the truss height. On the one hand, the construction cost is high and the construction period is long. On the other hand, it causes the crane boom to be unable to extend across the span, which increases the construction difficulty.

[0051] In step one, the steel wire safety rope 2 is 32m lower than the middle lower chord of the tensioned arch space triangular tube truss 1, which can play a good protective role.

[0052] In step one, a middle support rod 11 is fixed at the bottom end of the lower chord 3 in the middle of the tensioned arch space triangular tube truss 1, and a middle rope loop 12 is fixed at the bottom end of the middle support rod 11. The steel wire safety rope 2 passes through the middle rope loop 12, which cleverly provides support in the middle and ensures the stability of the steel wire safety rope 2.

[0053] In step one, before the steel wire safety rope 2 is fixed to the column base 4, the steel wire safety rope 2 is tensioned by a 2-ton chain hoist to ensure the tension of the steel wire safety rope 2.

[0054] In step two, two longitudinal beams 13 are also set inside the safety net 8 frame to ensure that the safety net 6 has good structural strength. The specifications and materials of the safety net 8 itself can be specified in the installation specifications, and will not be elaborated here.

[0055] The safety net 6 has a specification of 6m*15.5m, and the wire rope frame 7 is made of φ12mm wire rope. The size is reasonable and can effectively provide protection.

[0056] A steel pipe 14 is fitted onto the steel wire rope frame 7. A safety net hanging ring 15 is welded to the inside of the steel pipe 14, and an anti-detachment spring buckle 9 is welded to the outside of the steel pipe 14. The installation of the safety net 8 can ensure that the position of the steel pipe 14 is fixed, thereby ensuring the fixation of the anti-detachment spring buckle 9.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for constructing a movable horizontal safety net for a tensioned arch spatial triangular truss, characterized in that: Includes the following steps, Step 1: Set up the steel wire safety rope (2); Several parallel steel wire safety ropes (2) are installed at intervals along the length of the tensioned arch spatial triangular tube truss (1). The direction of the steel wire safety ropes (2) is perpendicular to the length of the tensioned arch spatial triangular tube truss (1). The horizontal steel wire safety ropes (2) are tensioned below the lower chord (3) in the middle of the tensioned arch spatial triangular tube truss (1). One end of the steel wire safety rope (2) is fixed to the arc-shaped node below the lower chord (3) by a U-shaped clip. The other end of the steel wire safety rope (2) is... After passing the arc-shaped node at the same height on the opposite side, it turns to the column base (4) of the tensioned arch space triangular tube truss (1) on this side. A safety collar is fixedly installed on the column base (4). The steel wire safety rope (2) is fixed to the safety collar by a U-shaped clip. Four fixed pulleys (5) are installed on the steel wire safety rope (2) through the rope sleeve. Two of the fixed pulleys (5) are located at both ends of the horizontal section of the steel wire safety rope (2), and the other two fixed pulleys (5) are located in the middle of the horizontal section of the steel wire safety rope (2). Step 2: Safety net (6) fabrication; The safety net (6) is made on the ground and includes a rectangular wire rope frame (7) and a safety net (8) inside the rectangular wire rope frame (7). Anti-detachment spring buckles (9) are fixed on the outside of the wire rope frame (7). The length of the wire rope frame (7) is such that the anti-detachment spring buckles (9) on both sides are respectively fastened to the wire safety ropes (2) on both sides. Wire traction ropes (10) are welded to the four corners of the wire rope frame (7). Step 3: Install the safety net (6); After the safety net (6) frame is made, a truck crane is used to hoist the safety net (6). Two safety nets (6) are installed between two steel wire safety ropes (2). The two safety nets (6) are installed on both sides of the middle of the horizontal section near the steel wire safety rope (2). The installers use a ladder truck to reach one side of the safety net (6) and hang the anti-detachment spring buckles (9) on the steel wire safety rope (2) point by point. After all are completed, the truck crane can release the hook. Step 4: Slide the safety net (6); The installers use a climbing vehicle to pass the steel wire traction rope (10) of the safety net (6) through the fixed pulley (5) at the corresponding corner and then turn it downwards. The ground personnel pull the steel wire traction rope (10) to pull the safety net (6) directly below the workers to prevent falls. After pulling it into place, the steel wire traction rope (10) is temporarily fixed to the ground with counterweights or angle steel anchors to prevent the safety net (6) from moving randomly. Step 5: Safety net (6) turnover; Safety ropes are set up in advance in the next installation span. After the safety net (6) of the completed span is removed, it can be installed in the next installation span. Specifically, the dismantling personnel reach the binding point of the safety net (6) by using a ladder truck, and tie the hoisting wire rope of the truck crane to the frame of the safety net (6). The truck crane starts to lift the hook, and the dismantling personnel reach the anti-detachment hook node of the short side of the safety net (6) by using a ladder truck. The anti-detachment hook and safety rope are removed point by point. The truck crane lifts the safety net (6) to the next span and repeats the above installation process to install the safety net (6).

2. The method for constructing a movable horizontal safety net for a tensioned arch spatial triangular truss according to claim 1, characterized in that: In step one, the steel wire safety rope (2) is 2m lower than the middle lower chord (3) of the tensioned arch space triangular tube truss (1).

3. The method for constructing a movable horizontal safety net for a tensioned arch spatial triangular truss according to claim 2, characterized in that: In step one, a middle support rod (11) is fixed at the bottom end of the lower chord rod (3) in the middle of the tensioned arch space triangular tube truss (1), and a middle rope loop (12) is fixed at the bottom end of the middle support rod (11). The steel wire safety rope (2) passes through the middle rope loop (12).

4. The method for constructing a movable horizontal safety net for a tensioned arch spatial triangular truss according to claim 3, characterized in that: In step one, the steel wire safety rope (2) is tensioned by a 2-ton chain hoist before it is fixed to the bottom of the column (4).

5. The method for constructing a movable horizontal safety net for a tensioned arch spatial triangular truss according to claim 4, characterized in that: In step two, two longitudinal beams (13) are also installed inside the safety net (8) frame.

6. The method for constructing a movable horizontal safety net for a tensioned arch spatial triangular truss according to claim 5, characterized in that: The safety net (6) has a specification of 6m*15.5m, and the wire rope frame (7) is a φ12mm wire rope.

7. The method for constructing a movable horizontal safety net for a tensioned arch spatial triangular truss according to claim 6, characterized in that: The steel wire rope frame (7) is fitted with a steel pipe (14), and a safety net hanging ring (15) is welded to the inside of the steel pipe (14), and an anti-detachment spring buckle (9) is welded to the outside of the steel pipe (14).

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