Expressway overpass bridge dismantling method

Abstract

The invention discloses an expressway overpass bridge dismantling method, and relates to the technical field of overpass bridge construction, the expressway overpass bridge dismantling method comprises a construction preparation stage and an arch bridge dismantling stage, the construction preparation stage comprises construction road preparation, construction water preparation, construction electricity and illumination preparation, technical preparation, material stacking and temporary site preparation, and other preparation; the arch bridge dismantling stage comprises the following steps that firstly, traffic is closed; 2, pedestrian arch bridge road protection; thirdly, the anti-throwing net and the guardrails are chiseled away; 4, removing approach bridges at the two ends; 5, the arch ring is chiseled away; sixthly, crushed materials and muck are treated; 7, cleaning work is carried out; and 8, recovering the traffic. The whole demolition process has clear steps and flows, the project is ensured to be completed on time through reasonable construction organization, a safe, efficient, environment-friendly and economical bridge demolition working mode is adopted, smooth traffic can be ensured, and the requirements of modern engineering construction and urban management are met.

Description

Technical Field

[0001] The invention relates to the technical field of overpass construction, and in particular to a method for dismantling an overpass on a highway. Background Art

[0002] In the last century, in order to solve the problem of level crossings between roads and railways, my country adopted a large number of steel-concrete composite bridge structures for highway overpasses due to the limitations of technical conditions at the time. Due to the long years of operation and the low design level under the national strength and productivity level at the time, the traffic pressure brought about by my country's more than 30 years of rapid development was not fully foreseen. In addition, the repeated prohibition of overloaded and over-limit vehicles left huge safety hazards for the overpasses built at that time. In response to the emergence of this problem, combined with the national policy of people-oriented and safety first, my country's highway overpasses are bound to enter a stage of comprehensive upgrading and renovation.

[0003] The existing technology has the following problems:

[0004] When demolishing a highway overpass, you may encounter a variety of problems, including that surrounding traffic may be disrupted during the demolition, increasing the risk of traffic accidents; if the demolition sequence or method is improper, the bridge structure may become unstable or even collapse unexpectedly; and the waste and wastewater generated during the demolition process may pollute soil and water resources. These problems may affect the construction progress, safety, cost, and surrounding environment. Summary of the invention

[0005] The present invention provides a method for dismantling a highway overpass bridge to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A method for dismantling a highway cross-line bridge includes a construction preparation stage and an arch bridge dismantling stage. The construction preparation stage includes construction road preparation, construction water preparation, construction electricity and lighting preparation, technical preparation, material stacking and temporary site preparation, and other preparations. The arch bridge dismantling stage includes the following steps:

[0008] Step 1: Close the traffic;

[0009] Step 2: Pedestrian arch bridge road protection;

[0010] Step 3: Chisel away the anti-throwing nets and guardrails;

[0011] Step 4: Dismantle the approach bridges at both ends;

[0012] Step 5: Chisel out the arch ring;

[0013] Step 6: Processing of crushed materials and slag;

[0014] Step 7: Cleaning up;

[0015] Step 8: Restore traffic.

[0016] The further improvement of the technical solution of the present invention is that ensuring the smooth flow of the construction road is the key in the preparation of the construction road. The existing national highways, high-speed roads, township roads and village roads can be used to easily enter the construction area. The main line access road is set to connect various construction points to ensure that materials and equipment can reach each construction point smoothly. For the crushing machinery at the demolition point, temporary standing sites and passages are built in advance to ensure the smooth operation of the machinery.

[0017] In the preparation of construction water, the rivers and ditches near the bridge demolition area provide a convenient source of construction water, and the supply of construction water on site can be ensured by taking water or using transport vehicles to transport water;

[0018] The above mentioned construction electricity and lighting preparation uses a generator to provide electricity for the bridge demolition construction, and high-power projection lights are arranged in advance at each demolition site. At the same time, headlights are provided for on-site construction workers to ensure lighting and safety during nighttime construction;

[0019] The technical preparation meeting will organize technical personnel to familiarize themselves with and master the relevant drawing design and construction specification requirements and drawing review records before the start of bridge demolition. The project chief engineer will organize all construction personnel to conduct corresponding plan briefings so that they can clearly understand the procedures, process flow, quality inspection control points and control standards of each construction step;

[0020] In the material stacking and temporary site preparation, ton bags and other materials are packed in advance and transported to the temporary site, and the remaining materials are transported to the site one day before the construction. The temporary site is planned to use the widened areas on both sides of the original highway to facilitate the stacking and management of materials;

[0021] The other preparations include deploying construction machinery and equipment such as breakers, excavators, loaders, oxy welding machines, and dump trucks at the temporary site in advance according to the equipment plan;

[0022] Construction workers, full-time safety officers and on-site management personnel arrive at designated locations before the road is closed to prepare for construction;

[0023] For non-high-speed demolition areas, cordons and warning signs are set up, and special personnel are arranged to guard to prevent non-construction personnel from entering;

[0024] Investigate the poles and pipelines at the demolition site in advance, relocate the poles and pipelines that may be affected, and ensure construction safety;

[0025] Key management personnel and equipment operators are equipped with walkie-talkies to facilitate on-site communication and coordination.

[0026] A further improvement of the technical solution of the present invention is that in step one, after the interchange is closed, the traffic police and the management office clear the closed area twice to ensure that all private vehicles leave the blocked area, persuade vehicles in the service area to leave and isolate and close it, use water barriers to close high-speed traffic at work sites that have been confirmed to have no private vehicles, set up warning strips and reflective signs on the outside, and prevent all unrelated external vehicles and personnel from entering the construction site during construction.

[0027] A further improvement of the technical solution of the present invention is that in the step two, the central median strip of the highway and the anti-collision guardrails on both sides of the road will be removed first, and then two layers of geotextiles will be spread on the road surface under the arch bridge, and ton bags will be laid. The paving width will be laid according to the uncontrollable maximum width in the direction of bridge collapse to prevent damage to the road surface caused by the collapse of the arch bridge, and steel plates of different sizes will be separately laid on the central median strip to protect highway pipeline equipment.

[0028] A further improvement of the technical solution of the present invention is that in step three, since the auxiliary facilities are light in weight and the overall stiffness of the bridge is not reduced when the auxiliary facilities are removed, the bridge structure is safe at this time, so they are directly removed from the bridge. During the removal, mechanical and oxygen-acetylene demolition are used.

[0029] A further improvement to the technical solution of the present invention is that in the step four, the aqueducts at both ends of the bridge are firstly broken, and the impact force generated by each section of the aqueduct during the collapse and fall process hits the arch column or arch ring, causing the entire arch bridge structure to become unstable or the arch ring to be unevenly compressed to produce structural deformation and collapse. If the upper aqueduct does not hit the pier or arch ring during the demolition process, the arch bridge structure does not undergo a large deformation and become unstable. At this time, the long-arm excavator shifts its position and continues to chisel forward the upper aqueduct, increasing the deformation caused by the uneven load on the arch ring until the uneven pressure on the arch ring reaches the limit and collapses naturally.

[0030] A further improvement of the technical solution of the present invention is that in step five, a long-arm breaker is used to chisel out the arch foot of the double-rib arch, first the arch foot on the side away from the breaker is damaged, and then the arch foot on the closer side is broken, so that one end of the arch ring falls, and the beam is broken by the force generated by the deadweight of the beam and the arch ribs.

[0031] A further improvement of the technical solution of the present invention is that in step 6, the beam body falls to the ground, firstly the concrete blocks on the side slopes on both sides are cleaned to the roadside or the road surface, then the large concrete blocks are hoisted outside the road, and some crushing hammer equipment is arranged to crush the small concrete blocks to the extent that the processing condition is met for dump truck transportation, and finally the dump truck is used as the main body, and the loader and excavator are used as auxiliary to abandon the slag and crushed materials to the temporary sites on both sides of the original road surface for classified stacking;

[0032] At the end of the cleaning work, the dust and debris generated by the crushing must be cleaned up, and the road surface must be washed with water to restore it to its original state. This process must give priority to completing the demolition construction within the planned time and ensuring the normal opening of the original highway traffic.

[0033] A further improvement of the technical solution of the present invention is that in step seven, the dust and debris generated by the crushing need to be cleaned up, and finally the road surface is washed with water to restore it to its original state. This process must give priority to completing the demolition construction within the planned time and ensuring the normal opening of the original high-speed traffic.

[0034] A further improvement of the technical solution of the present invention is that if part of the highway road surface is damaged in step eight, maintenance vehicles are sent to the site for repair in a timely manner. If there is no problem, the removed guardrails are restored, and full-width traffic is restored after all finishing work is completed.

[0035] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0036] 1. The present invention provides a method for dismantling a highway cross-line bridge, which adopts a safe, efficient, environmentally friendly and economical bridge dismantling working method, can ensure the smoothness of traffic, and meet the needs of modern engineering construction and urban management. Through two site clearances by the traffic police and the management office, the safety of the blocked area is ensured, and the mistaken entry of social vehicles and irrelevant personnel is avoided, and the safety risks in the construction process are reduced. The entire dismantling process has clear steps and processes. Through reasonable construction organization, the project is ensured to be completed on time. After the dismantling work is completed, the traffic can be restored in time, reducing the impact of the dismantling project on the surrounding traffic.

[0037] 2. The present invention provides a method for dismantling a highway cross-line bridge, which includes laying geotextiles and ton bags under a pedestrian arch bridge and laying steel plates to protect highway pipeline equipment, thereby effectively preventing damage to the road and equipment below due to the collapse of the bridge. Lightweight ancillary facilities such as anti-throwing nets and guardrails are directly dismantled on the bridge, thereby simplifying the construction process and improving construction efficiency. When dismantling the approach bridges at both ends, the structure is made unstable or deformed by striking the arch columns or arch rings, thereby achieving controlled collapse of the bridge and reducing possible accidents during the dismantling process.

[0038] 3. The present invention provides a method for dismantling a highway cross-line bridge. A long-arm breaker is used to chisel off the arch ring, and the crushing range can be accurately controlled, reducing damage to the surrounding environment and structure. The crushed materials and slag after demolition are classified, stacked and processed, which is beneficial to subsequent recycling and utilization, reducing material waste and also beneficial to environmental protection. By using equipment such as dump trucks, loaders and excavators, the transportation and stacking of slag and crushed materials are efficiently completed, the resource utilization efficiency is improved, and the project cost is reduced by accurately controlling the demolition process and rationally utilizing resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the process of dismantling a highway overpass bridge of the present invention. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with embodiments:

[0041] Example 1

[0042] like Figure 1 As shown, the present invention provides a method for dismantling a highway cross-line bridge, including a construction preparation stage and an arch bridge dismantling stage. The construction preparation stage includes construction road preparation, construction water preparation, construction electricity and lighting preparation, technical preparation, material stacking and temporary site preparation, and other preparations. The arch bridge dismantling stage includes the following steps:

[0043] Step 1: Close the traffic;

[0044] Step 2: Pedestrian arch bridge road protection;

[0045] Step 3: Chisel away the anti-throwing nets and guardrails;

[0046] Step 4: Dismantle the approach bridges at both ends;

[0047] Step 5: Chisel out the arch ring;

[0048] Step 6: Processing of crushed materials and slag;

[0049] Step 7: Cleaning up;

[0050] Step 8: Restore traffic.

[0051] In this embodiment, through the above steps, the safety of personnel and equipment during the construction process can be ensured and the risk of accidents can be reduced. Clear steps and preparations can ensure that the construction process is carried out in an orderly manner, improve work efficiency, reasonably handle construction waste, and reduce pollution to the environment. Through reasonable construction planning and resource allocation, costs can be saved and unnecessary waste can be reduced. By restoring traffic in a timely manner, the impact on surrounding traffic and residents' lives can be reduced and social benefits can be improved. Through technical preparation and supervision, construction quality can be ensured and later repairs and rework can be avoided.

[0052] Example 2

[0053] On the basis of Example 1, the present invention provides a technical solution: preferably, ensuring the smooth flow of the construction road is the key in the preparation of the construction road. The existing national highways, high-speed roads, township roads and village roads can be used to conveniently enter the construction area. The main line access road is set to connect various construction points to ensure that materials and equipment can smoothly reach each construction point. For the crushing machinery at the demolition point, temporary station sites and passages are built in advance to ensure the smooth operation of the machinery;

[0054] In the preparation of construction water, the rivers and ditches near the bridge demolition area provide a convenient source of construction water. The supply of construction water on site can be ensured by taking water or using transport vehicles to transport water;

[0055] During the construction electricity and lighting preparation, generators were used to provide electricity for the bridge demolition construction. High-power projection lights were arranged in advance at each demolition site, and headlights were provided to on-site construction workers to ensure lighting and safety during nighttime construction.

[0056] Before the start of bridge demolition, the technical preparation meeting will organize technical personnel to familiarize themselves with and master the relevant drawing design and construction specification requirements and drawing review records, and the project chief engineer will organize all construction personnel to conduct corresponding plan briefings to make them clear about the procedures, process flow, quality inspection control points and control standards of each construction step;

[0057] Materials stacking and temporary site preparation: Ton bags and other materials are packed in advance and transported to the temporary site, and the remaining materials are transported to the site one day before construction. The temporary site is planned to use the widened areas on both sides of the original highway to facilitate the stacking and management of materials;

[0058] Other preparations include deploying construction machinery and equipment such as breakers, excavators, loaders, oxy welding machines, and dump trucks at the temporary site in advance according to the equipment plan;

[0059] Construction workers, full-time safety officers and on-site management personnel arrive at designated locations before the road is closed to prepare for construction;

[0060] For non-high-speed demolition areas, cordons and warning signs are set up, and special personnel are arranged to guard to prevent non-construction personnel from entering;

[0061] Investigate the poles and pipelines at the demolition site in advance, relocate the poles and pipelines that may be affected, and ensure construction safety;

[0062] Key management personnel and equipment operators are equipped with walkie-talkies to facilitate on-site communication and coordination.

[0063] In this embodiment, by constructing access roads, temporary standing sites and passages in advance, it is ensured that machinery and materials can smoothly reach the construction site, thereby improving construction efficiency and reducing safety risks on site. By preparing water, electricity and lighting for construction, it is ensured that there is sufficient supply of resources during the construction process, ensuring the continuity of construction and the safety of nighttime construction. Technical preparations make technical personnel and construction personnel familiar with the design, construction specifications and quality control standards of the bridge, which helps to strictly follow the standards during the construction process to ensure construction quality. Through the plan briefing, all construction personnel can clearly understand the procedures, process flow and quality control points of each construction step, which helps to carry out the construction in an orderly manner and also clarifies their respective responsibilities. By transporting materials to temporary sites in advance and making reasonable plans, it helps to stack and manage materials in an orderly manner, reducing material waste and on-site chaos. Walkie-talkies are equipped for management personnel and equipment operators to enhance on-site communication and coordination capabilities, which helps to solve construction problems in a timely manner.

[0064] Example 3

[0065] On the basis of Example 1, the present invention provides a technical solution: Preferably, in step one, after the interchange is closed, the traffic police and the management office clear the closed area twice to ensure that all social vehicles leave the blocked area, persuade vehicles in the service area to leave and isolate and close it, use water barriers to close high-speed traffic at work sites that have been confirmed to have no social vehicles, set up warning strips and reflective signs on the outside, and prevent all unrelated external vehicles and personnel from entering the construction site during construction.

[0066] In step two, the central median strip of the highway and the anti-collision guardrails on both sides of the road will be removed first, and then two layers of geotextile will be laid on the road surface under the arch bridge, followed by ton bags. The paving width will be based on the uncontrollable maximum width in the direction of bridge collapse to prevent damage to the road surface caused by the collapse of the arch bridge. Steel plates of different sizes will be added to the central median strip to protect highway pipeline equipment.

[0067] In step three, since the weight of the ancillary facilities is relatively light and the overall stiffness of the bridge does not decrease when the ancillary facilities are removed, the bridge structure is safe at this time, so they are directly removed from the bridge. During the removal, mechanical and oxygen-acetylene demolition are used.

[0068] In step 4, the aqueducts at both ends of the bridge are first demolished. The impact force generated by each section of the aqueduct during the collapse and fall hits the arch column or arch ring, causing the entire arch bridge structure to become unstable or the arch ring to be unevenly compressed and produce structural deformation and collapse. If the upper trough body does not hit the pier or arch ring during the demolition process, the arch bridge structure does not undergo significant deformation and become unstable. At this time, the long-arm excavator shifts its position and continues to chisel forward the upper trough body, increasing the deformation caused by the uneven load on the arch ring until the uneven pressure on the arch ring reaches the limit and collapses naturally.

[0069] In step five, a long-arm breaker is used to chisel off the arch foot of the double-rib arch. The arch foot on the side away from the breaker is first chiseled off, and then the arch foot on the closer side is broken, so that one end of the arch ring falls down, and the beam is broken by the force generated by the deadweight of the beam and arch ribs.

[0070] In step 6, the beam falls to the ground. First, the concrete blocks on the slopes on both sides are cleaned to the roadside or the road surface. Then, the large concrete blocks are hoisted outside the road. Some crushing hammer equipment is arranged to crush the small concrete blocks. The degree of processing is to meet the conditions for dump truck transportation. Finally, the dump truck is used as the main body, and the loader and excavator are used as auxiliary to transport the slag and crushed materials to the temporary sites on both sides of the original road surface for classification and stacking;

[0071] At the end of the cleaning work, the dust and debris generated by the crushing must be cleaned up, and the road surface must be washed with water to restore it to its original state. This process must give priority to completing the demolition construction within the planned time and ensuring the normal opening of the original highway traffic.

[0072] In step seven, the dust and debris generated by the crushing must be cleaned up, and finally the road surface must be washed with water to restore it to its original state. This process must give priority to completing the demolition construction within the planned time and ensuring the normal opening of the original highway traffic.

[0073] If part of the highway road surface is damaged in step eight, maintenance vehicles will be sent to the site for repairs in a timely manner. If there are no problems, the removed guardrails will be restored. After all the finishing work is completed, full traffic will be restored.

[0074] In this embodiment, the safety of the blocked area is ensured through two clearances by the traffic police and the management office, and the mistaken entry of social vehicles and irrelevant personnel is avoided, reducing the safety risks in the construction process. The entire demolition process has clear steps and processes. Through reasonable construction organization, the project is ensured to be completed on time. After the demolition work is completed, the traffic can be restored in time, reducing the impact of the demolition project on the surrounding traffic. Geotextiles and ton bags are laid under the pedestrian arch bridge road, and steel plates are added to protect high-speed pipeline equipment, effectively preventing the collapse of the bridge from damaging the roads and equipment below. Lightweight ancillary facilities such as anti-throwing nets and guardrails are directly removed on the bridge, which simplifies the construction process and improves Construction efficiency: when the approach bridges at both ends are demolished, the arch columns or arch rings are hit to make the structure unstable or deformed, and the collapse of the bridge is achieved in a controlled manner, reducing possible accidents during the demolition process. The arch rings are removed by using long-arm breaker hammers, which can accurately control the crushing range and reduce damage to the surrounding environment and structure. The crushed materials and slag after demolition are classified, stacked and processed, which is conducive to subsequent recycling and reduces material waste. It is also beneficial to environmental protection. The transportation and stacking of slag and crushed materials are efficiently completed by using equipment such as dump trucks, loaders and excavators, which improves resource utilization efficiency and reduces engineering costs by accurately controlling the demolition process and rationally utilizing resources.

[0075] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A method for dismantling a highway overpass, characterized in that: It includes the construction preparation stage and the arch bridge demolition stage. The construction preparation stage includes construction road preparation, construction water preparation, construction electricity and lighting preparation, technical preparation, material stacking and temporary site preparation, and other preparations. The arch bridge demolition stage includes the following steps: Step 1: Close the traffic; Step 2: Pedestrian arch bridge road protection; Step 3: Chisel out the anti-throwing nets and guardrails; Step 4: Dismantle the approach bridges at both ends; Step 5: Chisel out the arch ring; Step 6: Processing of crushed materials and slag; Step 7: Cleaning up; Step 8: Restore traffic.

2. A method for dismantling a highway overpass according to claim 1, characterized in that: In the preparation of the construction road, ensuring the smooth flow of the construction road is the key. The existing national highways, Minggao Roads, township roads and village roads can be used to easily enter the construction area. The main line access road is set up to connect various construction sites to ensure that materials and equipment can reach each construction site smoothly. For the crushing machinery at the demolition site, temporary stations and passages are built in advance to ensure the smooth operation of the machinery. In the preparation of construction water, the rivers and ditches near the bridge demolition area provide a convenient source of construction water, and the supply of construction water on site can be ensured by taking water or using transport vehicles to transport water; The above mentioned construction electricity and lighting preparation uses a generator to provide electricity for the bridge demolition construction, and high-power projection lights are arranged in advance at each demolition site. At the same time, headlights are provided for on-site construction workers to ensure lighting and safety during nighttime construction; The technical preparation meeting will organize technical personnel to familiarize themselves with and master the relevant drawing design and construction specification requirements and drawing review records before the start of bridge demolition. The project chief engineer will organize all construction personnel to conduct corresponding plan briefings so that they can clearly understand the procedures, process flow, quality inspection control points and control standards of each construction step; In the material stacking and temporary site preparation, ton bags and other materials are packed in advance and transported to the temporary site, and the remaining materials are transported to the site one day before the construction. The temporary site is planned to use the widened areas on both sides of the original highway to facilitate the stacking and management of materials; The other preparations include deploying construction machinery and equipment such as breakers, excavators, loaders, oxy welding machines, and dump trucks at the temporary site in advance according to the equipment plan; Construction workers, full-time safety officers and on-site management personnel arrive at designated locations before the road is closed to prepare for construction; For non-high-speed demolition areas, cordons and warning signs are set up, and special personnel are arranged to guard to prevent non-construction personnel from entering; Investigate the poles and pipelines at the demolition site in advance, relocate the poles and pipelines that may be affected, and ensure construction safety; Key management personnel and equipment operators are equipped with walkie-talkies to facilitate on-site communication and coordination.

3. A method for dismantling a highway overpass according to claim 1, characterized in that: In the step 1, after the interchange is closed, the traffic police and the management office clear the closed area twice to ensure that all private vehicles leave the blocked area, persuade vehicles in the service area to leave and isolate and close it, use water barriers to close high-speed traffic at work sites that have been confirmed to have no private vehicles, set up warning strips and reflective signs on the outside, and prevent all unrelated external vehicles and personnel from entering the construction site during construction.

4. A method for dismantling a highway overpass according to claim 1, characterized in that: In the step 2, the central median strip of the highway and the anti-collision guardrails on both sides of the road will be removed first, and then two layers of geotextile will be laid on the road surface under the arch bridge, and ton bags will be laid. The paving width will be laid according to the uncontrollable maximum width in the direction of bridge collapse to prevent damage to the road surface caused by the collapse of the arch bridge. In addition, steel plates of different sizes will be added to the central median strip to protect highway pipeline equipment.

5. The method for dismantling a highway overpass according to claim 1, characterized in that: In the step three, since the auxiliary facilities are light in weight and the overall stiffness of the bridge is not reduced when the auxiliary facilities are removed, the bridge structure is safe at this time, so they are directly removed from the bridge. During the removal, mechanical and oxygen-acetylene demolition are used.

6. A method for dismantling a highway overpass according to claim 1, characterized in that: In the step 4, the aqueducts at both ends of the bridge are first demolished. The impact force generated by each section of the aqueduct during the collapse and fall process hits the arch column or arch ring, causing the entire arch bridge structure to become unstable or the arch ring to be unevenly compressed and produce structural deformation and collapse. If the upper trough body does not hit the pier or arch ring during the demolition process, the arch bridge structure does not undergo significant deformation and become unstable. At this time, the long-arm excavator shifts its position and continues to chisel forward the upper trough body, increasing the deformation caused by the uneven load on the arch ring until the uneven pressure on the arch ring reaches the limit and collapses naturally.

7. The method for dismantling a highway overpass according to claim 1, characterized in that: In step five, a long-arm breaker is used to chisel off the arch foot of the double-rib arch. The arch foot on the side away from the breaker is first chiseled, and then the arch foot on the side closer is broken, so that one end of the arch ring falls down, and the beam is broken by the force generated by the deadweight of the beam and the arch ribs.

8. The method for dismantling a highway overpass according to claim 1, characterized in that: In step 6, the beam falls to the ground, and the concrete blocks on the slopes on both sides are first cleaned to the roadside or the road surface, and then the large concrete blocks are hoisted outside the road, and some crushing hammer equipment is arranged to crush the small concrete blocks to the extent that the dump truck can be loaded and transported. Finally, the dump truck is used as the main body, and the loader and excavator are used as auxiliary to transport the slag and crushed materials to the temporary sites on both sides of the original road surface for classification and stacking; At the end of the cleaning work, the dust and debris generated by the crushing must be cleaned up, and the road surface must be washed with water to restore it to its original state. This process must give priority to completing the demolition construction within the planned time and ensuring the normal opening of the original highway traffic.

9. The method for dismantling a highway overpass according to claim 1, characterized in that: In step seven, the dust and debris generated by the crushing must be cleaned up, and the road surface must be washed with water to restore it to its original state. This process must give priority to completing the demolition construction within the planned time and ensuring the normal opening of the original highway traffic.

10. The method for dismantling a highway overpass according to claim 1, characterized in that: If part of the highway road surface is damaged in step eight, maintenance vehicles will be sent to the site for repair in a timely manner. If there are no problems, the removed guardrails will be restored. After all the finishing work is completed, full traffic will be restored.

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