A method for erecting and arranging a high-altitude high-formwork-operation safety flat net

Abstract

This invention belongs to the field of construction safety technology, specifically a method for erecting and arranging safety nets for high-altitude, high-formwork operations. The method includes the following steps: Step 1: Prefabricate multiple safety nets suitable for the scaffold specifications; Step 2: Install a set of safety nets every N layers on the scaffold, from the bottom to the top. Each set of safety nets includes cross-shaped bracing, a horizontal safety net formed by horizontally hanging safety nets, and a vertical safety net formed by vertically hanging safety nets. The bracing is located at the bottom of the horizontal and vertical safety nets; N is a non-zero natural number. This method for erecting and arranging safety nets for high-altitude, high-formwork operations solves the technical difficulties and construction safety issues associated with safety nets in actual engineering projects, provides reference and solutions for similar engineering practices, ensures the safety and rationality of the construction process, and has good economic benefits for engineering projects.

Description

Technical Field

[0001] This invention belongs to the field of construction safety technology, specifically relating to a method for setting up and arranging a safety net for high-altitude high-formwork operations. Background Technology

[0002] As one of the pillar industries of the national economy, the construction industry has made significant contributions to its healthy development. However, it remains an accident-prone sector, particularly due to a high proportion of accidents involving falls from heights, one of the four major hazards. Implementing sound safety precautions during construction is crucial for ensuring the safety, efficiency, and quality of the entire project and preventing accidents; the proper use of safety nets is an important component of this system. In recent years, increasing attention has been paid to controlling the quality of construction safety net installation.

[0003] During construction, to ensure the safety of workers, protective measures must be implemented when buildings reach a certain height to prevent falls. Safety nets are installed to prevent people and objects from falling, or to avoid or mitigate injuries from falls and impacts. Currently, the installation and safety issues related to safety nets in construction projects remain prominent, mainly in the following aspects:

[0004] (1) The existing safety net is not firmly connected to the scaffolding, posing a significant safety hazard to construction workers.

[0005] (2) Construction workers may fall onto the steel pipes between the scaffolds, but there are currently no protective measures on the steel pipes;

[0006] (3) At the construction site, the safety net and scaffolding poles are usually fixed with tie wires for binding steel bars. However, these tie wires are very thin. If the falling object is very heavy and the force of the fall is great, the tie wire will cut the net like a knife.

[0007] (4) The pins at the joint of the disc buckle protrude upwards and there are currently no protective measures, which can easily cause damage to falling objects and people. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a method for erecting and arranging safety nets for high-altitude high-formwork operations, which can reduce safety hazards and enterprise operating costs during construction, save resources, effectively improve production efficiency, and has high practical value.

[0009] The present invention proposes a method for erecting and arranging a safety net for high-altitude high-formwork operations, comprising the following steps:

[0010] Step 1: Prefabricate multiple safety nets that are suitable for the scaffold specifications.

[0011] Step 2: Install a set of safety nets every N layers on the scaffolding, from the bottom to the top. Each set of safety nets includes cross-shaped bracing, a horizontal safety net formed by horizontally hanging safety nets, and a vertical safety net formed by vertically hanging safety nets. The bracing is located at the bottom of the horizontal and vertical safety nets. N is a non-zero natural number.

[0012] Step 3: Install soft protective hemispheres at the joints of the scaffolding with safety netting on each floor, and connect the soft protective hemispheres to the safety netting as a whole.

[0013] Preferably, in step one, when prefabricating multiple safety nets suitable for the scaffold specifications, the connection between the safety net and the scaffold upright is connected with a safety net upright buckle, and the connection between the safety net and the scaffold horizontal bar is connected with a safety net horizontal bar buckle.

[0014] Preferably, in step two, each group of safety nets is arranged in a double-layer, two-way configuration, specifically as follows:

[0015] Step 201: Hang the safety net horizontally, connect the safety net to the scaffold uprights through the safety net upright clips, and connect the safety net to the scaffold horizontal bars through the safety net horizontal bar clips to form a horizontal safety net;

[0016] Step 202: Hang the safety net vertically above the horizontal safety net, connect the safety net to the scaffold uprights through the safety net upright clips, and connect the safety net to the scaffold horizontal bars through the safety net horizontal bar clips to form a vertical safety net;

[0017] Step 203: Install tension straps at the bottom of the horizontal safety net in a cross pattern, and fix both ends of the tension straps to the steel pipes at both ends to ensure that the net is subjected to balanced force.

[0018] Preferably, the safety net upright buckle and the safety net horizontal pole buckle are both buckles with an inner layer of rubber material.

[0019] Preferably, N is a natural number from 1 to 8.

[0020] Preferably, the width of the pull strap is determined as follows:

[0021] Step A: Perform finite element simulation on a computer to construct a model of the safety net. Drop objects of different weights from different heights to determine the peak breaking load F of the safety net corresponding to multiple different strap widths. max and average breaking load F mean .

[0022] Step B, according to the formula The load fluctuation coefficient Δ of the safety net during the buffering process was calculated for several different tension belt widths.

[0023] Step C: Select the belt width corresponding to the minimum load fluctuation coefficient Δ, and determine it as the belt width w.

[0024] Preferably, the soft protective hemisphere is a rubber protective hemisphere made of rubber material. The rubber protective hemisphere has a central hole at its middle position for passing through the scaffold upright. An expansion joint is provided on one side of the rubber protective hemisphere. The bottom surface of the rubber protective hemisphere has a pin hole for engaging with the pin at the joint of the scaffold's disc buckle. The bottom surface of the rubber protective hemisphere is pressed tightly against the safety net and connected to the safety net as a whole.

[0025] The above technical solution effectively avoids the danger posed by the pins at the joint of the disc buckle by using a rubber protective hemisphere.

[0026] Preferably, the pull strap comprises a belt body made of fiber material, with perforations in both the length and width directions of the belt body. Fiberglass wire is fixedly sleeved on the inner wall of the perforations in the length direction of the belt body, and carbon fiber wire is fixedly sleeved on the inner wall of the perforations in the width direction of the belt body. The connection method at the junction of the fiberglass wire and the carbon fiber wire includes, but is not limited to, any one or more of the following methods combined: warp and weft weaving, through-fixing, and superimposed bonding.

[0027] Through the above technical solutions, carbon fiber is lightweight, high-strength, and rigid, while also possessing excellent corrosion resistance.

[0028] Fiberglass, also known as reinforced plastic, is lightweight, high-strength, corrosion-resistant, and waterproof. It is also simple to manufacture and has a wide range of applications.

[0029] Preferably, the connection between the outer surface of the fiberglass wire and the perforation is further fixedly equipped with tensile protrusions to increase friction.

[0030] Through the above technical solution, the tensile protrusions can effectively increase the friction between the fiberglass wire and the perforation, preventing the fiberglass wire from detaching from the belt when subjected to a large impact force.

[0031] Preferably, the upper surface of the belt is fixedly equipped with a rectangular array of anti-slip protrusions to increase the friction of the safety net laid on its upper surface.

[0032] An arc-shaped buckle is also fixedly installed on the lower surface of the belt along the length of the horizontal bar of the scaffold to achieve a snap-fit ​​action with the horizontal bar of the scaffold.

[0033] Through the above technical solutions, the anti-slip protrusions effectively increase the friction when the safety net is laid on the upper surface of the support belt, preventing horizontal displacement and effectively avoiding displacement between the meshes of the safety net in both the transverse and longitudinal directions, thus ensuring uniform stress distribution on the safety net as a whole. The arc-shaped buckles enable quick connection to the scaffolding.

[0034] Preferably, the safety net is composed of composite wires, which include a core wire, with copper wire spirally wound on the outer surface of the core wire, and a coating adhesive is provided in the gap between the core wire and the copper wire. Finally, the composite wires are woven into a safety net.

[0035] By using the above technical solution, a core wire with better tensile strength is used to form the center wire, which can enhance the tensile strength.

[0036] Preferably, the core wire is composed of graphene fibers, and the composite wire is prepared through the following steps:

[0037] S1. Fabrication: Graphene fibers and precursor solution are added to a screw extruder, and after washing and drying, graphene composite round fibers with a diameter of 1.2-2 mm and a density of 450-500 D are obtained.

[0038] S2, stranding: a graphene composite round wire is stranded with a copper wire to form a primary strand, and then multiple primary strands are stranded together to form a composite wire;

[0039] S3, twisting: stretching and twisting the composite yarn into a roll;

[0040] S4. Warping: After the composite threads on multiple drums are led out, they are wound onto the drum one by one.

[0041] The precursor solution comprises cyanoacrylate, thermally conductive carbon fiber, dispersant, and ethanol;

[0042] The precursor solution contains 40%-55% cyanoacrylate solution by mass, 30%-38% thermally conductive carbon fiber by mass, 2%-3% dispersant by mass, and the balance being ethanol.

[0043] The beneficial effects of this invention are as follows:

[0044] 1. Compared with the conventional method of using wire ties to fix the horizontal poles of scaffolding and safety nets in engineering, this invention connects the safety net to the scaffolding uprights through safety net pole clips and to the scaffolding horizontal poles through safety net pole clips. The connection is reliable and firm, which can effectively avoid safety hazards during construction.

[0045] 2. This invention sets the inner layer of the safety net upright buckle and the safety net horizontal bar buckle as a rubber layer, which can effectively prevent the safety net from being cut when the falling object is very heavy and the falling force is large during construction.

[0046] 3. By setting a rubber protective hemisphere, the present invention can effectively avoid the danger caused by the pins at the joint of the disc buckle. Moreover, the structure of the rubber protective hemisphere is reasonably designed and is convenient and quick to install and disassemble.

[0047] 4. This invention can reduce safety hazards and enterprise operating costs during construction, save resources, and effectively improve production efficiency, thus having high practical value.

[0048] 5. By incorporating fiberglass and carbon fiber wires, this invention effectively increases the tensile strength of the pull belt 3, thereby effectively increasing its tensile strength and impact resistance in the horizontal direction.

[0049] 6. This invention will solve the technical difficulties and construction safety problems of safety nets for high-altitude high-formwork operations in actual engineering projects, and provide reference and solutions for similar engineering practices, ensuring the safety and rationality of the construction process, and bringing good economic benefits to engineering projects. Attached Figure Description

[0050] Figure 1 This is a flowchart of the method of the present invention;

[0051] Figure 2 A schematic diagram of the safety net protection structure completed using the method of the present invention;

[0052] Figure 3 This is a three-dimensional diagram of the tensioning structure of a safety net erection method for high-altitude high-formwork operations proposed in this invention.

[0053] In the diagram: 1. Horizontal safety net; 2. Vertical safety net; 3. Straps; 31. Belt body; 32. Fiberglass wire; 33. Carbon fiber wire; 34. Tensile protrusions; 35. Anti-slip protrusions; 36. Arc-shaped buckle; 4. Soft protective hemisphere. Detailed Implementation

[0054] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0055] Reference Figure 1-3 A method for erecting and arranging a safety net for high-altitude high-formwork operations includes the following steps:

[0056] Step 1: Prefabricate multiple safety nets suitable for the scaffold specifications. In specific implementation, when prefabricating multiple safety nets suitable for the scaffold specifications in Step 1, the widest part of the mesh of the safety net should not exceed 5cm.

[0057] The connection between the safety net and the scaffold upright is connected with a safety net upright buckle, and the connection between the safety net and the scaffold horizontal bar is connected with a safety net horizontal bar buckle.

[0058] This invention uses a rubber layer as the inner layer of the safety net upright clip and the safety net horizontal clip. When the object falling during construction is heavy and the force of the fall is large, it can effectively prevent the safety net from being cut.

[0059] Step 2: Install a set of safety netting every N layers on the scaffolding, from the bottom to the top. Each set of safety netting includes cross-shaped bracing 3, a horizontal safety netting 1 formed by horizontally hanging safety netting, and a vertical safety netting 2 formed by vertically hanging safety netting. The bracing 3 is located at the bottom of the horizontal safety netting 1 and the vertical safety netting 2. N is a non-zero natural number, and N is a natural number from 1 to 8.

[0060] In step two, each safety net group adopts a double-layer, two-way arrangement, and the specific arrangement method is as follows:

[0061] Step 201: Hang the safety net horizontally, connect the safety net to the scaffold uprights through the safety net upright buckle, and connect the safety net to the scaffold horizontal bar through the safety net horizontal bar buckle to form the horizontal safety net 1;

[0062] Step 202: Hang a safety net longitudinally on the upper part of the horizontal safety net 1, connect the safety net to the scaffold uprights through the safety net upright buckle, and connect the safety net to the scaffold horizontal bar through the safety net horizontal bar buckle to form a longitudinal safety net 2.

[0063] Step 203: Install the tension straps 3 in a cross pattern at the bottom of the horizontal safety net 1, and fix both ends of the tension straps 3 to the steel pipes at both ends, so that the net bag of the safety net is subjected to balanced force.

[0064] Furthermore, both the safety net upright buckle and the safety net horizontal pole buckle are buckles with an inner layer of rubber material.

[0065] Step 3: Install soft protective hemispheres 4 at the joints of the scaffolding with safety netting on each floor, and connect the soft protective hemispheres 4 to the safety netting as a whole.

[0066] The soft protective hemisphere 4 is a rubber protective hemisphere made of rubber material. A central hole for threading onto the scaffold uprights is provided in the middle of the hemisphere. An expansion joint is provided on one side of the hemisphere. A pin hole is provided on the bottom surface of the hemisphere for engaging with the pins at the scaffold's snap-lock connection points. The bottom surface of the hemisphere is pressed tightly against the safety net and integrated with it. This invention, by using a rubber protective hemisphere, effectively avoids the danger posed by the pins at the snap-lock connection points. Furthermore, the hemisphere's structural design is reasonable, and its installation and disassembly are convenient and quick.

[0067] Furthermore, the method for determining the width of the pull strap 3 is as follows:

[0068] Step A: Perform finite element simulation on a computer to construct a model of the safety net. Drop objects of different weights from different heights to determine the peak breaking load F of the safety net corresponding to multiple different widths of the tension straps. max and average breaking load F mean ;

[0069] Step B, according to the formula The load fluctuation coefficient Δ of the safety net during the buffering process was calculated for multiple different widths of the pull strap (3);

[0070] Step C: Select the width of the tension belt 3 corresponding to the minimum load fluctuation coefficient Δ, and determine it as the width w of tension belt 3.

[0071] Furthermore, the pull strap 3 includes a belt body 31 made of fiber material. The belt body 31 has perforations in both its length and width directions. Fiberglass wire 32 is fixedly sleeved on the inner wall of the perforations in the length direction of the belt body 31. Fiberglass, also known as reinforced plastic, has the characteristics of being lightweight, high-strength, corrosion-resistant, and waterproof. Moreover, it has a simple manufacturing process and a wide range of applications.

[0072] Carbon fiber threads 33 are fixedly sleeved onto the inner wall of the perforations along the width direction of the belt body 31. Carbon fiber is lightweight, high-strength, and rigid, while also possessing excellent corrosion resistance. The connection method at the intersection of the fiberglass thread 32 and the carbon fiber thread 33 includes, but is not limited to, any combination of one or more of the following methods: warp and weft weaving, through-fixing, and overlapping bonding. By incorporating fiberglass threads 32 and carbon fiber threads 33, this invention effectively increases the tensile strength of the pull belt 3, thereby effectively increasing its horizontal tensile strength and impact resistance.

[0073] Furthermore, tensile protrusions 34 for increasing friction are fixedly installed at the connection between the outer surface of the fiberglass wire 32 and the perforation.

[0074] The tensile protrusions 34 can effectively increase the friction between the fiberglass wire 32 and the perforation, preventing the fiberglass wire 32 from detaching from the belt when subjected to a large impact force.

[0075] Furthermore, the upper surface of the belt 31 is fixedly equipped with a rectangular array of anti-slip protrusions 35 to increase the friction of the safety net laid on its upper surface.

[0076] An arc-shaped buckle 36 is also fixedly installed on the lower surface of the belt body 31 along the length direction of the horizontal bar of the scaffold, so as to realize the snap-fit ​​action with the horizontal bar of the scaffold.

[0077] The anti-slip protrusions 35 effectively increase the friction when the safety net is laid on the upper surface of the tension belt 3, preventing horizontal displacement and effectively avoiding displacement between the meshes of the safety net in both the transverse and longitudinal directions, thus ensuring uniform stress distribution on the safety net as a whole. Meanwhile, the arc-shaped buckle 36 enables quick connection to the scaffolding.

[0078] The safety net is composed of composite wires, each including a core wire with copper wire spirally wound around its outer surface. Adhesive is applied between the core wire and the copper wire, and the composite wires are then woven into the safety net. Using a core wire with higher tensile strength to form the center line enhances the tensile strength.

[0079] Furthermore, the core wire is composed of graphene fibers, and the composite wire is prepared through the following steps:

[0080] S1. Fiber preparation: Graphene fibers and precursor solution are added to a screw extruder, and after washing and drying, graphene composite round fibers with a diameter of 1.2-2 mm and a density of 450-500 D are obtained.

[0081] S2, stranding: a graphene composite round wire is stranded with a copper wire to form a primary strand, and then multiple primary strands are stranded together to form a composite wire.

[0082] S3, twisting: stretching and twisting the composite yarn into a roll.

[0083] S4. Warping: After the composite threads on multiple drums are led out, they are wound onto the drum one by one.

[0084] The precursor solution includes cyanoacrylate, thermally conductive carbon fiber, dispersant, and ethanol.

[0085] The precursor solution contains 40%-55% cyanoacrylate solution by mass, 30%-38% thermally conductive carbon fiber by mass, 2%-3% dispersant by mass, and the balance being ethanol.

[0086] Cyanoacrylate is an important component of instant adhesives, suitable for bonding small areas of metal wires or other materials with high strength. It can effectively connect the core wire to the copper wire, and the dispersant ensures uniform dispersion of the materials, facilitating thorough mixing. The resulting composite wire exhibits strong tensile strength.

[0087] This invention reduces safety hazards and operational costs during construction, saves resources, and effectively improves production efficiency, demonstrating high practical value. Compared to the conventional method of using wire ties to fix scaffold horizontal poles and safety nets in engineering projects, connecting the safety net to the scaffold uprights via safety net upright clips and to the scaffold horizontal poles via safety net horizontal pole clips ensures a reliable and secure connection, effectively avoiding safety hazards during construction. This invention solves the technical challenges and construction safety issues associated with safety nets in high-altitude, high-formwork operations in practical engineering projects, providing reference and solutions for similar engineering practices, ensuring the safety and rationality of the construction process, and resulting in good economic benefits for engineering projects.

[0088] 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 equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for erecting and arranging a safety net for high-altitude high-formwork operations, characterized in that: Includes the following steps: Step 1: Prefabricate multiple safety nets suitable for the scaffold specifications; Step 2: Install a set of safety nets every N layers on the scaffolding, from the bottom to the top. Each set of safety nets includes cross-shaped bracing (3), a horizontal safety net (1) formed by horizontally hanging safety nets, and a vertical safety net (2) formed by vertically hanging safety nets. The bracing (3) is located at the bottom of the horizontal safety net (1) and the vertical safety net (2); N is a non-zero natural number. The method for determining the width of the pull strap (3) is as follows: Step A: Perform finite element simulation on a computer to construct a model of the safety net. Drop objects of different weights from different heights to determine the peak breaking load F of the safety net corresponding to multiple different widths of the tension straps (3). max and average breaking load F mean ; Step B, according to the formula The load fluctuation coefficient Δ of the safety net during the buffering process was calculated for multiple different widths of the pull strap (3); Step C: Select the width of the tension band (3) corresponding to the minimum load fluctuation coefficient Δ, and determine it as the width w of the tension band (3); Step 3: Install soft protective hemispheres (4) at the joints of the disc-lock nodes of the scaffolding with safety netting on each floor, and connect the soft protective hemispheres (4) to the safety netting as a whole; The safety net is composed of composite wires, which include a core wire, with copper wire spirally wound on the outer surface of the core wire. The gap between the core wire and the copper wire is also covered with adhesive. Finally, the composite wires are woven into a safety net. The core wire is composed of graphene fibers, and the composite wire is prepared through the following steps: S1. Fabrication: Graphene fibers and precursor solution are added to a screw extruder, and after washing and drying, graphene composite round fibers with a diameter of 1.2-2 mm and a density of 450-500 D are obtained. S2, stranding: a graphene composite round wire is stranded with a copper wire to form a primary strand, and then multiple primary strands are stranded together to form a composite wire; S3, twisting: stretching and twisting the composite yarn into a roll; S4. Warping: After the composite threads on multiple drums are led out, they are wound onto the drum one by one. The precursor solution comprises cyanoacrylate, thermally conductive carbon fiber, dispersant, and ethanol; The precursor solution contains 40%-55% cyanoacrylate solution by mass, 30%-38% thermally conductive carbon fiber by mass, 2%-3% dispersant by mass, and the balance being ethanol.

2. The method for erecting and arranging a safety net for high-altitude high-formwork operations according to claim 1, characterized in that: In step one, when prefabricating multiple safety nets suitable for the scaffold specifications, the connection between the safety net and the scaffold upright is connected with a safety net upright buckle, and the connection between the safety net and the scaffold horizontal bar is connected with a safety net horizontal bar buckle.

3. The method for erecting and arranging a safety net for high-altitude high-formwork operations according to claim 2, characterized in that: In step two, each safety net group adopts a double-layer, two-way arrangement, and the specific arrangement method is as follows: Step 201: Hang the safety net horizontally, connect the safety net to the scaffold uprights through the safety net upright buckle, and connect the safety net to the scaffold horizontal bar through the safety net horizontal bar buckle to form a horizontal safety net (1); Step 202: Hang a safety net vertically on the upper part of the horizontal safety net (1), connect the safety net to the scaffold uprights through the safety net upright buckle, and connect the safety net to the scaffold horizontal bar through the safety net horizontal bar buckle to form a vertical safety net (2). Step 203: Install the pull straps (3) at the bottom of the horizontal safety net (1) in a cross shape, and fix the two ends of the pull straps (3) to the steel pipes at both ends respectively, so that the net bag of the safety net is subjected to balanced force.

4. The method for erecting and arranging a safety net for high-altitude high-formwork operations according to claim 3, characterized in that: Both the safety net uprights and the safety net horizontal poles have a rubber inner layer.

5. The method for erecting and arranging a safety net for high-altitude high-formwork operations according to claim 4, characterized in that: N is a natural number from 1 to 8.

6. The method for erecting and arranging a safety net for high-altitude high-formwork operations according to claim 1, characterized in that: The soft protective hemisphere (4) is a rubber protective hemisphere made of rubber material. The middle position of the rubber protective hemisphere is provided with a central hole for passing through the scaffold upright. An expansion joint is provided on one side of the rubber protective hemisphere. The bottom surface of the rubber protective hemisphere is provided with a pin hole for engaging with the pin at the joint of the scaffold's disc buckle node. The bottom surface of the rubber protective hemisphere is pressed against the safety net and connected to the safety net as a whole.

7. The method for erecting and arranging a safety net for high-altitude high-formwork operations according to claim 1, characterized in that: The pull strap (3) includes a belt body (31) made of fiber material. The belt body (31) has perforations in both its length and width directions. A fiberglass wire (32) is fixedly sleeved on the inner wall of the perforation in the length direction of the belt body (31), and a carbon fiber wire (33) is fixedly sleeved on the inner wall of the perforation in the width direction of the belt body (31). The connection method at the junction of the fiberglass wire (32) and the carbon fiber wire (33) includes, but is not limited to, any one or more of the following methods: warp and weft weaving, through fixing, and superimposed bonding. The connection between the outer surface of the fiberglass wire (32) and the perforation is also fixedly equipped with tensile protrusions (34) to increase friction. The upper surface of the belt (31) is fixedly equipped with a rectangular array of anti-slip protrusions (35) to increase the friction of the safety net laid on its upper surface; An arc-shaped buckle (36) is also fixedly installed on the lower surface of the belt body (31) along the length direction of the horizontal bar of the scaffold, so as to realize the snap-fit ​​action with the horizontal bar of the scaffold.

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