A kind of suspension rod safety removal device and removal method

Abstract

The present invention discloses a device and method for safely dismantling a hanger, and belongs to the technical field of arch bridge structures. It includes a hanger and a beam body, and a dismantling structure is arranged around two of the hangers, and four top corners of the dismantling structure are all arranged with double-jointed channel steels; it also includes a protective net, and the protective net is arranged between adjacent double-jointed channel steels; the protective net is provided with an operation port, and when cutting the hanger, the bottom end of the double-jointed channel steel is fixedly connected to the beam body, and a steel strand is arranged on the inner side of the double-jointed channel steel, and the double-jointed channel steel and the hanger are fixedly connected through the steel strand to form a lateral constraint. The cutting operation is performed through the operation port, and a moving wheel is also arranged at the bottom of the device, so that it can be conveniently moved to the next area for operation when the dismantling is completed, and the device uses simple materials, and the dismantling process has a high degree of visualization, is safe and reliable, and is convenient for standardized construction, while ensuring the safety of the operators, and can be used cyclically.

Description

Technical Field

[0001] The invention relates to the technical field of arch bridge structures, and in particular to a hanger rod safety dismantling device and a dismantling method. Background Art

[0002] The mid-through arch bridge has been greatly developed in recent years due to its reasonable force bearing and beautiful appearance. The hanger, as the key component connecting the arch rib and the bridge system, transfers the dead load and live load borne by the bridge system to the arch rib, and is the main load-bearing component of the mid-through arch bridge.

[0003] The removal and reinforcement of existing mid-through arch bridges cannot be separated from the cutting or replacement of the hangers. At present, the hanger removal or replacement devices and methods are mainly focused on the hangers that have been disconnected by hot melting or cutting, so the hangers are already in a free state. Since the hangers generate a large tensile force at the moment of cutting, it poses a serious threat to the safety of on-site construction personnel, especially the safety of cutting personnel. The occurrence of safety hazards not only affects the subsequent construction, but also greatly increases the construction period and cost. Summary of the invention

[0004] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to propose a boom safety dismantling device and dismantling method, which can improve work efficiency and ensure the safety of operators.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The present invention provides a safe dismantling device for a boom, comprising a boom and a beam body, wherein a dismantling structure is arranged around two of the booms, and four top corners of the dismantling structure are provided with double-jointed channel steels; the device also comprises a protective net, and the protective net is arranged between adjacent double-jointed channel steels; when the boom is cut, the bottom end of the double-jointed channel steel is fixedly connected to the beam body, a steel strand is arranged on the inner side of the double-jointed channel steel, and the double-jointed channel steel is fixedly connected to the boom through the steel strand to form a lateral constraint.

[0007] The preferred technical solution of the present invention is that the demolition structure also includes a transverse channel steel, the length direction of the transverse channel steel is perpendicular to the direction of the connection line of the two suspension rods; the double-jointed channel steel is composed of two channel steel waists facing each other, and the double-jointed channel steel waist is welded to the channel legs at both ends of the transverse channel steel to form two groups of combined steel structure components.

[0008] The preferred technical solution of the present invention is that the demolition structure also includes a round tube, the double-piece channel steel channel waist is provided with a round tube hole matching the round tube, and the round tube is inserted into the round tube hole to connect the two groups of combined steel structure components.

[0009] The preferred technical solution of the present invention is that a moving wheel is fixedly provided at the bottom end of the double-jointed channel steel to facilitate workers to move the combined steel structure components for safe operation.

[0010] The preferred technical solution of the present invention is that it also includes a limiting angle steel. When the hanger is cut, the double-jointed channel steel is fixedly connected to the beam body at one end close to the beam body through the limiting angle steel.

[0011] The preferred technical solution of the present invention is that the double-jointed channel steel uses No. 20 channel steel and the transverse channel steel uses No. 10 channel steel.

[0012] The preferred technical solution of the present invention is that connecting fasteners are provided at both ends of the protective net, and the connecting fasteners are provided with through holes that cooperate with the round tube. The round tube passes through the through holes to connect the protective net and the double-jointed channel steel into a whole, so as to protect the workers during cutting.

[0013] The preferred technical solution of the present invention is that the protective net is provided with operating openings at both ends close to the double-jointed channel steel, so that workers can operate from the outside while observing the condition of the suspension rod inside.

[0014] A boom safety dismantling device and dismantling method, comprising the following steps: step S00: pre-welding double-joined channel steel and transverse channel steel into a whole to form two groups of combined steel structure components; step S10: arranging a moving wheel at one end of each group of steel structures; step S20: placing the two groups of steel structures on both sides of the boom respectively; step S30: arranging a round tube hole between four groups of vertical double-joined channel steels, passing the round tube through the double-joined channel steel and the protective net connecting fastener to form a closed structure, and connecting the steel strand, the boom and the combined steel structure component into a whole; step S40: after the combined steel structure component is positioned, the limiting angle steel and the beam body are bolted to ensure the stability of the combined steel structure component during construction; an operation port is arranged on the protective net for oxygen welding cutting and real-time observation; Step S50: heat the boom through the operation port, stretch the boom by heating it, release most of the tension, and make preliminary preparations for cutting the boom later; Step S60: observe the heating condition of the boom at all times through the operation port, and provide timely feedback to the operator. The operator adjusts the preheating position of the boom according to the feedback from the observer to ensure that the boom is evenly heated; Step S70: after the preheating of the boom is completed, test the cable tension of the preheated boom through the cable tension dynamic measuring instrument; Step S80: after the cable tension loss of the boom exceeds 80%, the operator can perform oxygen cutting through the operation port, and the cutting process adopts uniform cutting from the outside to the inside; Step S90: dismantle the device, move the device to the next position to continue the operation, and then process the boom (hot melt treatment).

[0015] The preferred technical solution of the present invention is that in step S30, the round tube can only play a limiting role. After the round tube passes through the round tube hole and the through hole of the protective net for positioning, the steel bar is inserted into the round tube or the round tube is directly replaced by the steel bar to achieve the fixing effect.

[0016] The beneficial effects of the present invention are:

[0017] (1) The safety removal device provided by the present invention has a simple structure, makes full use of common structural materials, is easy to install, disassemble and use, is detachable and recyclable; and has reasonable strength and strong size adaptability, and can be quickly installed on site, which greatly facilitates the rapid commissioning of the boom removal work;

[0018] (2) The components are easy to transport and install, can be quickly installed on site, and can be quickly installed and put into use; and the modular steel structure components are made of high-strength steel, with small structural deformation, good rigidity and stability, and long service life;

[0019] (3) Work efficiency is improved. The demolition process is highly visualized, safe and reliable, and easy to standardize. At the same time, the safety of workers is ensured. Moreover, it can be recycled and used, saving a lot of materials, which is economical and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the boom safety removal device provided in a specific embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of a combined steel structure member provided in a specific embodiment of the present invention;

[0022] Figure 3 is a side view of a boom safety removal device provided in a specific embodiment of the present invention;

[0023] Figure 4 is a top view of a boom safety removal device provided in a specific embodiment of the present invention;

[0024] In the figure:

[0025] 1. Combined steel structure components; 2. Round tube; 3. Protective net; 4. Hanger; 5. Limit angle steel; 6. Moving wheel; 7. Beam body; 8. Steel strand; 11. Double-jointed channel steel; 12. Transverse channel steel; 13. Round tube hole; 31. Connecting fastener; 32. Operating port; 111. Channel waist; 121. Channel leg; 311. Through hole. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0027] like Figure 1-4As shown, this embodiment provides a boom safety dismantling device, including booms 4 and beams 7. A dismantling structure is arranged around two booms 4, and double-jointed channel steels 11 are arranged at four top corners of the dismantling structure; a protective net 3 is also included, and the protective net 3 is arranged between adjacent double-jointed channel steels 11; when cutting the booms 4, the bottom end of the double-jointed channel steel 11 is fixedly connected to the beam 7, and a steel strand 8 is arranged inside the double-jointed channel steel 11. The double-jointed channel steel 11 and the boom 4 are fixedly connected through the steel strand 8 to form a lateral constraint. The double-jointed channel steel 11 and the protective net 3 surround the boom 4 in the middle. In order to ensure the structural strength and safe operation, the double-jointed channel steel 11 is fixed to the beam 7; in order to ensure the stability of the boom during the cutting process, the steel strand 8 arranged inside the double-jointed channel steel 11 is fixedly connected to the boom 4, and multiple layers of steel strands 8 can be arranged to connect the double-jointed channel steel 11 and the boom 4. During the cutting process, the debris and sparks generated will cause great harm to the operator. By setting the protective net, the operator can be effectively protected.

[0028] Preferably, the demolition structure also includes a transverse channel steel 12, the length direction of the transverse channel steel 12 is perpendicular to the direction of the line connecting the two hangers 4; the double-jointed channel steel 11 is composed of two channel steel waists 111 opposite to each other, and the waist 111 of the double-jointed channel steel 11 is welded to the channel legs 121 at both ends of the transverse channel steel 12 to form two groups of combined steel structure components 1; the double-jointed channel steel 11 uses No. 20 channel steel, and the transverse channel steel 12 uses No. 10 channel steel, so that the entire device constitutes a detachable structure, and the combined steel structure component 1 can be transported and installed separately, which greatly speeds up the construction progress.

[0029] Preferably, a moving wheel 6 is fixed at the bottom end of the double-jointed channel steel 11 to facilitate workers to move the combined steel structure component 1 for safe operation. Especially for continuous operation, the protective net 3 on one side can be removed by pulling out the round tube 2, so that it can be conveniently moved to the next area for operation.

[0030] Preferably, it also includes a limiting angle steel 5. When cutting the suspension rod 4, the double-jointed channel steel 11 is fixedly connected to the beam body 7 at one end thereof through the limiting angle steel 5, thereby ensuring the strength and stability of the entire demolition device during operation.

[0031] Preferably, connecting fasteners 31 are provided at both ends of the protective net 3, and the connecting fasteners 31 are provided with through holes 311 that cooperate with the circular tube 2. The circular tube 2 passes through the through holes 311 to connect the protective net 3 and the double-jointed channel steel 11 into a whole. Through the connecting fasteners 31 and the circular tube 2, the protective net can be disassembled, which is convenient for workers to move and transport the entire device.

[0032] Preferably, in order to enable workers to work more safely under the protection of the protective net 3, operation openings 32 are opened at both ends of the protective net 3 close to the double-jointed channel steel 11, so that workers can operate from the outside and observe the situation of the internal suspension rod 4 at the same time, so as to adjust the operation in time according to the actual situation.

[0033] A device and method for safely dismantling a boom, comprising the following steps: Step S00: pre-weld and connect the double-jointed channel steel 11 and the horizontal channel steel 12 into a whole to form two groups of modular steel structure components 1; Step S10: set a moving wheel 6 at one end of each group of steel structures; Step S20: place the two groups of steel structures on both sides of the boom 4 respectively; Step S30: set a round tube hole 13 between the four groups of vertical double-jointed channel steels 11, pass the round tube 2 through the double-jointed channel steel 11 and the protective net 3 to connect the fastener 31 to form a closed structure, and connect the steel strand 8, the boom 4 and the modular steel structure component 1 into a whole; Step S40: after the modular steel structure component 1 is positioned, the limiting angle steel 5 and the beam body 7 are bolted to ensure that the modular steel structure component 1 is stable during construction; an operating port 32 is set on the protective net 3 for oxygen welding cutting and real-time observation; Step S50: heat the boom 4 through the operating port 32, and elongate the boom 4 by heating to release most of it. The tension is applied to prepare for the subsequent cutting of the boom 4; step S60: the heating condition of the boom 4 is constantly observed through the operation port 32, and timely feedback is given to the operator. The operator adjusts the preheating position of the boom 4 according to the feedback information from the observer to ensure that the boom 4 is evenly heated; step S70: after the preheating of the boom 4 is completed, the preheated cable tension of the boom 4 is tested by the cable tension dynamic measuring instrument; step S80: after the cable tension loss of the boom 4 exceeds 80%, the operator can perform oxygen cutting through the operation port 32, and the cutting process adopts uniform cutting from the outside to the inside; step S90: the device is dismantled, and the device is moved to the next position to continue the operation, and the boom 4 is subsequently subjected to hot-melt treatment; the boom safety dismantling device used in this method is detachable and recyclable, and the boom 4 is preheated through the external operation port 32 to increase the elongation of the boom, thereby reducing the internal force of the boom and reducing the disturbance to the surrounding environment when the boom breaks.

[0034] Preferably, in step S30, the circular tube 2 can only play a limiting role. After the circular tube 2 passes through the circular tube hole 13 and the through hole 311 of the protective net 3 to be positioned, the steel bars are inserted into the circular tube 2 or the circular tube 2 is directly replaced with the steel bars to achieve the fixing effect. The limiting method of the circular tube 2 enhances the flexibility of the device, the device spacing can be adjusted in time, it has greater dimensional adaptability, and simultaneously enhances the overall stability of the structure.

[0035] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. A boom safety removal device, characterized in that: It comprises a suspension rod (4) and a beam body (7), wherein a dismantling structure is arranged around the two suspension rods (4), and the four top corners of the dismantling structure are all provided with double-jointed channel steels (11); It also includes a protective net (3), wherein the protective net (3) is arranged between adjacent double-jointed channel steels (11); When the suspension rod (4) is cut, the bottom end of the double-jointed channel steel (11) is fixedly connected to the beam body (7), a steel strand (8) is arranged inside the double-jointed channel steel (11), and the double-jointed channel steel (11) and the suspension rod (4) are fixedly connected via the steel strand (8) to form a lateral constraint; The demolition structure further comprises a transverse channel steel (12), the length direction of the transverse channel steel (12) being perpendicular to the direction of the line connecting the two suspension rods (4); The double-jointed channel steel (11) is composed of two oppositely disposed channel steel waists (111), and the channel waists (111) of the double-jointed channel steel (11) are welded to the channel legs (121) at both ends of the transverse channel steel (12) to form two groups of assembled steel structure components (1); It also includes a limiting angle steel (5). When the suspension rod (4) is cut, the end of the double-jointed channel steel (11) close to the beam body (7) is fixedly connected to the beam body (7) through the limiting angle steel (5).

2. The boom safety removal device according to claim 1, characterized in that; The demolition structure also includes a round tube (2), and the groove waist of the double-jointed channel steel (11) is provided with a round tube hole (13) that matches the round tube (2), and the round tube (2) is inserted into the round tube hole (13) to connect the two groups of combined steel structure components (1).

3. The boom safety removal device according to claim 1, characterized in that: The bottom end of the double-jointed channel steel (11) is fixedly provided with a moving wheel (6) to facilitate workers to move the combined steel structure component (1) for safe operation.

4. The boom safety removal device according to claim 1, characterized in that: The double-jointed channel steel (11) uses a No. 20 channel steel, and the transverse channel steel (12) uses a No. 10 channel steel.

5. The boom safety removal device according to claim 2, characterized in that: Connecting fasteners (31) are provided at both ends of the protection net (3), and the connecting fasteners (31) are provided with through holes (311) that cooperate with the round tube (2). The round tube (2) passes through the through holes (311) to connect the protection net (3) and the double-jointed channel steel (11) into a whole, so as to protect the workers during cutting.

6. The boom safety removal device according to claim 1, characterized in that: The protective net (3) is provided with operation openings (32) at both ends close to the double-jointed channel steel (11), so that workers can operate from the outside while observing the condition of the suspension rod (4) inside.

7. A method for safely removing a boom, using the apparatus for safely removing a boom as claimed in any one of claims 1 to 6, characterized in that: The method comprises the following steps: Step S00: pre-welding the double-jointed channel steel (11) and the transverse channel steel (12) into a whole to form two groups of assembled steel structure components (1); Step S10: arranging a moving wheel (6) at one end of each group of assembled steel structure components (1); Step S20: placing two groups of assembled steel structure components (1) on both sides of the suspension rod (4) respectively; Step S30: a circular tube hole (13) is provided between four groups of vertical double-jointed channel steels (11), a circular tube (2) is passed through the double-jointed channel steels (11), a protective net (3) is passed through the connecting fastener (31) to form a closed structure, and the steel strand (8) and the suspension rod (4) are connected to the assembled steel structure member (1) to form a whole; Step S40: After the combined steel structure component (1) is positioned, the limiting angle steel (5) and the beam body (7) are bolted to ensure the stability of the combined steel structure component (1) during the construction process; an operating port (32) is provided on the protective net (3) for oxygen welding cutting and real-time observation; Step S50: heating the suspension rod (4) through the operating port (32), thereby extending the suspension rod (4) by increasing the temperature and releasing most of the tension, thus making preliminary preparations for the subsequent cutting of the suspension rod (4); Step S60: The heating condition of the suspension rod (4) is constantly observed through the operation port (32), and timely fed back to the operator. The operator constantly adjusts the preheating position of the suspension rod (4) according to the feedback information from the observer to ensure that the suspension rod (4) is evenly heated; Step S70: After the preheating of the suspension rod (4) is completed, the cable force after preheating of the suspension rod (4) is tested by a cable force dynamic measuring instrument; Step S80: After the rope force loss of the suspension rod (4) exceeds 80%, the operator can perform oxygen cutting through the operation port (32), and the cutting process adopts uniform cutting from the outside to the inside; Step S90: the device is dismantled and moved to the next position to continue the operation, and the suspension rod (4) is subsequently processed (hot melt processing).

8. A method for safely removing a boom according to claim 7, characterized in that: In step S30, the circular tube (2) may only play a limiting role. After the circular tube (2) passes through the circular tube hole (13) and the through hole (311) of the protective net (3) to be positioned, the steel bar is inserted into the circular tube (2) or the circular tube (2) is directly replaced by the steel bar to achieve the fixing effect.

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