Ramp bridge removal method

Abstract

The present invention discloses a ramp bridge demolition method, which relates to the technical field of bridge demolition, wherein the ramp bridge demolition method comprises the following steps: constructing a crash barrier at the connection between the main bridge and the ramp bridge; defining a cutting line at the connection between the main bridge and the ramp bridge; using a water drill to drill a plurality of water drill holes spaced along the cutting line; using a rope saw to cut the bridge deck between any two adjacent water drill holes; breaking the bridge deck of the ramp bridge within the cutting range; returning to the step of cutting the bridge deck between any two adjacent water drill holes with a rope saw until the main bridge is completely separated from the ramp bridge; breaking the piers and piles of the ramp bridge; and demolishing the ramp bridge approach. The ramp bridge demolition method proposed by the present invention does not affect the normal passage of the main bridge during the construction process, and the rope saw cutting construction has low vibration and low noise, which effectively reduces the impact on urban traffic circulation and the surrounding environment.

Description

Technical Field

[0001] The invention relates to the technical field of bridge demolition, and in particular to a ramp bridge demolition method. Background Art

[0002] With the changes in urban traffic flow, many bridge structures built in the early days have affected the current traffic development needs. Therefore, the demolition and reconstruction of existing bridge facilities have become an important part of urban traffic planning, especially for those old ramp bridges that hinder traffic flow and affect construction. They need to be demolished and reconstructed under the premise of ensuring the normal passage of the main roads, so as to better meet the requirements of the modern transportation network.

[0003] In the context of urban traffic planning, the demolition of ramp bridges involves the complexity of traffic organization and the impact on the surrounding environment. Traditional demolition methods often require closing roads for construction, which affects the city's traffic flow. At the same time, the noise and vibration problems caused by the demolition of ramp bridges have a negative impact on the surrounding environment. Summary of the invention

[0004] The main purpose of the present invention is to propose a ramp bridge demolition method, which aims to solve the technical problems that traditional ramp bridge demolition methods often require closing roads for construction, affecting urban traffic circulation, and the noise, vibration and other problems generated have adverse effects on the surrounding environment.

[0005] To achieve the above-mentioned purpose, in the ramp bridge demolition method proposed in the present invention, the ramp bridge is connected to the main bridge, and the ramp bridge demolition method includes the following steps: constructing a crash barrier at the connection between the main bridge and the ramp bridge; defining a cutting line at the connection between the main bridge and the ramp bridge; drilling a plurality of water drill holes spaced along the cutting line by using a water drill; cutting the bridge deck between any two adjacent water drill holes by using a rope saw; breaking the bridge deck of the ramp bridge within the cutting range; returning to the step of cutting the bridge deck between any two adjacent water drill holes by using a rope saw until the main bridge is completely separated from the ramp bridge; breaking the piers and piles of the ramp bridge; and demolishing the approach of the ramp bridge.

[0006] In one embodiment, the rope saw machine includes a saw rope and two pulling components, the pulling components include a fastening block, a guide rail, a guide block and a motor, the guide block is provided with a guide groove, one end of the guide rail is connected to the fastening block, and the other end of the guide rail is passed through the guide groove, and the motor is used to drive the guide rail to slide with the corresponding guide block; the two ends of the saw rope are respectively detachably connected to the two fastening blocks.

[0007] In one embodiment, the step of using a rope saw machine to cut the bridge deck between any two adjacent water drill holes includes: respectively passing the two ends of the saw rope through any two adjacent water drill holes; respectively connecting the two ends of the saw rope to the two fastening blocks, and tightening the saw rope; and respectively driving the two guide rails to slide back and forth along the corresponding guide grooves by the two motors to drive the saw rope to reciprocate and cut the bridge deck.

[0008] In one embodiment, the pulling assembly also includes a base and an adjusting bolt, the guide block is rotatably connected to the base, the adjusting bolt is arranged at the connection between the guide block and the base, and the adjusting bolt is used to adjust the connection angle between the guide block and the base; after the step of connecting the two ends of the saw rope to the two fastening blocks respectively and tightening the saw rope, the ramp bridge demolition method also includes: fixing the base to the ground; adjusting the connection angle between the guide block and the base by the adjusting bolt to adjust the cutting angle of the saw rope.

[0009] In one embodiment, the step of breaking the bridge deck of the ramp bridge within the cutting range includes: using a crusher to crush the bridge deck concrete of the ramp bridge within the cutting range, and sprinkling water on the crushed position; using an oxygen-acetylene cutting machine to cut off the steel bars at the crushed position.

[0010] In one embodiment, the step of constructing a crash barrier at the connection between the main bridge and the ramp bridge includes: laying out a line at the connection between the main bridge and the ramp bridge to mark the position to be constructed; chiseling the concrete on the surface of the position to be constructed to expose the structural reinforcement; vertically planting the structural reinforcement to form a steel cage; and pouring concrete on the steel cage to form the crash barrier.

[0011] In one embodiment, there are two crash barriers, each crash barrier extends along the extension direction of the main bridge to separate the main bridge from the ramp bridge, and the two crash barriers are spaced apart along the extension direction of the ramp bridge.

[0012] In one embodiment, after the step of constructing a crash barrier at the connection between the main bridge and the ramp bridge, the ramp bridge demolition method further includes: constructing a protective fence around the columns of the main bridge; the protective fence is spaced apart from the columns; and a protective layer is filled between the protective fence and the columns.

[0013] In one embodiment, after the step of constructing a crash barrier at the connection between the main bridge and the ramp bridge, the ramp bridge demolition method further comprises: using an oxygen-acetylene cutting machine to cut off the railings on the ramp bridge; and breaking down the guardrails on the ramp bridge.

[0014] In one embodiment, after returning to the step of using a rope saw to cut the bridge deck between any two adjacent water-drilled holes until the main bridge and the ramp bridge are completely separated, the ramp bridge demolition method further includes: applying an anti-rust interface protective agent on the cut surface of the main bridge.

[0015] The ramp bridge demolition method proposed in the present invention separates the main bridge from the ramp bridge by setting a crash wall, and the cutting line between the ramp bridge and the main bridge is located on the side of the crash wall close to the ramp bridge, so that the ramp bridge demolition construction does not affect the normal passage of the main bridge, and effectively reduces the impact on urban traffic circulation. During the ramp bridge demolition construction, multiple water drill holes are drilled at intervals along the cutting line, and the bridge deck within the range between the two water drill holes is cut in sequence by a rope saw machine, so that the main bridge deck and the ramp bridge deck are separated from each other. After a single cutting, the ramp bridge deck within the cutting range is immediately broken, and the entire ramp bridge deck is completely demolished through multiple cutting and breaking construction. Finally, the piers and piles of the ramp bridge are broken in sequence, and the ramp bridge approach is dismantled, so that the demolition of the entire ramp bridge can be completed. A water drill is used in conjunction with a rope saw to cut and separate the main bridge deck and the ramp bridge deck. The construction speed is fast, the cutting vibration is small, and the noise is low. The ramp bridge demolition construction has little impact on the main bridge, effectively reducing interference with the main bridge traffic and reducing interference with the surrounding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the planar structure of an embodiment of a ramp bridge removal method provided by the present invention;

[0018] Figure 2 A schematic cross-sectional structure diagram of an embodiment of a ramp bridge removal method provided by the present invention;

[0019] Figure 3 A structural schematic diagram of an embodiment of a rope saw machine in a ramp bridge demolition method provided by the present invention;

[0020] Figure 4 A schematic diagram of a process flow of an embodiment of a ramp bridge dismantling method provided by the present invention.

[0021] Description of Figure Numbers:

[0022] 10. Main bridge; 20. Ramp bridge; 30. Crash barrier; 40. Cutting line; 41. Water drilling hole; 50. Rope saw machine; 51. Saw rope; 52. Fastening block; 53. Guide rail; 54. Guide block; 55. Motor; 56. Base; 57. Adjusting bolt.

[0023] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] In the context of urban traffic planning, the demolition of ramp bridges involves the complexity of traffic organization and the impact on the surrounding environment. Traditional demolition methods often require closing roads for construction, which affects the city's traffic flow. At the same time, the noise and vibration problems caused by the demolition of ramp bridges have a negative impact on the surrounding environment.

[0028] The present invention provides a ramp bridge removal method, wherein the ramp bridge 20 is connected to the main bridge 10. The ramp bridge removal method provided by the present invention comprises the following steps:

[0029] S10: constructing a crash barrier at the connection between the main bridge and the ramp bridge;

[0030] S20: drawing a cutting line at the connection between the main bridge and the ramp bridge;

[0031] S30: using a water drill to drill a plurality of water drill holes spaced apart along the cutting line;

[0032] S40: using a wire saw to cut the bridge deck between any two adjacent water drill holes;

[0033] S50: removing the bridge deck of the ramp bridge within the cutting range;

[0034] S60: Return to the step of cutting the bridge deck between any two adjacent water-bored holes by using a wire saw until the main bridge is completely separated from the ramp bridge;

[0035] S70: removing the bridge piers and piles of the ramp bridge;

[0036] S80: dismantling the approach road of the ramp bridge.

[0037] See also Figure 1 and Figure 4 The ramp bridge removal method proposed in the present invention is used to remove the ramp bridge 20 from the main bridge 10. When removing the ramp bridge 20, first, a crash barrier 30 is constructed on the bridge deck of the ramp bridge 20. The crash barrier 30 blocks the connection between the ramp bridge 20 and the main bridge 10 to separate the ramp bridge 20 from the main bridge 10, so as to facilitate the construction of the ramp bridge 20. Subsequently, a cutting line 40 is determined according to the connection position between the ramp bridge 20 and the main bridge 10. The cutting line 40 is located on the side of the crash barrier 30 close to the ramp bridge 20. The cutting line 40 provides positioning for the drilling of the water drilling machine 41, so that the water drilling machine 41 drills a plurality of water drill holes 41 at intervals on the cutting line 40, and each water drill hole 41 runs through the entire bridge deck. Then, the bridge deck between any two adjacent water drill holes 41 is cut by the rope saw machine 50, so that the ramp bridge 20 is separated from the main bridge 10 at the cutting line 40. After the rope saw machine 50 completes the cutting between the two water drill holes 41, the bridge deck of the ramp bridge 20 within the range between the two water drill holes 41 is immediately broken to ensure that the ramp bridge 20 is completely separated from the main bridge 10. After the breaking is completed, the next position is cut until the cutting and breaking within the length of the entire cutting line 40 are completed, and the entire bridge deck of the ramp bridge 20 is demolished. Finally, the piers and piles of the ramp bridge 20 are broken in turn, and the approach road of the ramp bridge 20 is dismantled, and the demolition of the entire ramp bridge 20 can be completed.

[0038] It should be explained that when cutting and breaking the bridge deck, the positions at both ends of the cutting line 40 are preferentially cut and broken, that is, the positions at the edge of the ramp bridge 20 are preferentially cut and broken. Preferably, two wire saws 50 are used to simultaneously cut the positions at both ends of the cutting line 40 and simultaneously break the edges of both sides of the ramp bridge 20, so that the forces on both sides of the ramp bridge 20 are more uniform during the demolition process, which helps to maintain the stability and safety of the ramp bridge 20 during the demolition process.

[0039] The ramp bridge demolition method proposed in the present invention separates the main bridge 10 from the ramp bridge 20 by setting a crash wall 30, and the cutting line 40 between the ramp bridge 20 and the main bridge 10 is located on the side of the crash wall 30 close to the ramp bridge 20, so that the demolition construction of the ramp bridge 20 does not affect the normal passage of the main bridge 10, and effectively reduces the impact on urban traffic circulation. During the demolition construction of the ramp bridge 20, a plurality of water drill holes 41 are drilled at intervals along the cutting line 40, and the bridge deck within the range between two water drill holes 41 is cut in sequence by a rope saw machine 50, so that the bridge deck of the main bridge 10 and the bridge deck of the ramp bridge 20 are separated from each other, and the bridge deck of the ramp bridge 20 within the cutting range is immediately broken after a single cutting, and the entire bridge deck of the ramp bridge 20 is completely demolished through multiple cutting and breaking construction, and finally the piers and piles of the ramp bridge 20 are broken in sequence, and the approach road of the ramp bridge 20 is dismantled, and the demolition of the entire ramp bridge 20 can be completed. A water drilling machine 41 is used in conjunction with a rope saw machine 50 to cut and separate the bridge deck of the main bridge 10 and the bridge deck of the ramp bridge 20. The construction speed is fast, the cutting vibration is small, and the noise is low. The demolition construction of the ramp bridge 20 has little impact on the main bridge 10, effectively reducing interference with the traffic on the main bridge 10 and reducing interference with the surrounding environment.

[0040] In one embodiment, the rope saw machine 50 includes a saw rope 51 and two pulling components, the pulling components include a fastening block 52, a guide rail 53, a guide block 54 and a motor 55, the guide block 54 is provided with a guide groove, one end of the guide rail 53 is connected to the fastening block 52, and the other end of the guide rail 53 is passed through the guide groove, and the motor 55 is used to drive the guide rail 53 to slide with the corresponding guide block 54; the two ends of the saw rope 51 are respectively detachably connected to the two fastening blocks 52.

[0041] See also Figure 3The two ends of the saw rope 51 are respectively connected to the fastening blocks 52 in the two pulling assemblies. The fastening blocks 52 are detachably connected to the saw rope 51. The fastening blocks 52 can adjust the connection position with the saw rope 51 to keep the saw rope 51 tight at different cutting lengths, ensuring the stability of the saw rope 51 during the cutting process. One end of the guide rail 53 is connected to the fastening block 52, and the other end of the guide rail 53 is inserted into the guide groove on the guide block 54. The guide rail 53 slides along the guide groove, so that the guide rail 53 drives the saw rope 51 to move along the extension direction of the guide rail 53 through the fastening block 52, so as to guide the cutting direction of the saw rope 51. The motor 55 is used to drive the guide rail 53 in the same pulling assembly to slide along the guide groove. The two motors 55 in the two pulling assemblies drive the two guide rails 53 to slide in opposite directions at the same time, so that the saw rope 51 moves in the same direction. The two motors 55 drive the guide rail 53 to slide back and forth at the same frequency to achieve repeated movement of the saw rope 51, thereby facilitating the saw rope 51 to cut. The two ends of the saw rope 51 are detachably connected to the two fastening blocks 52, so that the saw rope 51 can be quickly replaced when it is worn or damaged, thereby reducing maintenance time.

[0042] In one embodiment, step S30 includes:

[0043] S31: inserting the two ends of the saw rope into any two adjacent water drilling holes respectively;

[0044] S32: connecting the two ends of the saw rope to the two fastening blocks respectively, and tightening the saw rope;

[0045] S33: The two guide rails are driven by the two motors to slide back and forth along the corresponding guide grooves, so as to drive the saw rope to reciprocate and cut the bridge deck.

[0046] It can be understood that the two ends of the saw rope 51 are respectively inserted into the two water drill holes 41, so that the saw rope 51 extends and cuts along the direction of the cutting line 40. After the saw rope 51 passes through the water drill hole 41, the two ends of the saw rope 51 are connected to the fastening blocks 52 of the two pulling components to ensure that the saw rope 51 remains taut during the cutting process to provide the necessary cutting force. After the saw rope 51 is fixed and tightened, the guide rail 53 is driven by the motor 55 to slide back and forth in the guide groove, thereby driving the saw rope 51 to reciprocate and realize continuous cutting of the bridge deck. The driving force of the motor 55 ensures the efficient reciprocating motion of the saw rope 51, improving the efficiency and accuracy of cutting.

[0047] In one embodiment, the pulling assembly further includes a base 56 and an adjusting bolt 57, the guide block 54 is rotatably connected to the base 56, the adjusting bolt 57 is disposed at the connection between the guide block 54 and the base 56, and the adjusting bolt 57 is used to adjust the connection angle between the guide block 54 and the base 56;

[0048] After step S32, the ramp bridge removal method further comprises the steps of:

[0049] S321: Fixing the base to the ground;

[0050] S322: Adjust the connection angle between the guide block and the base through the adjusting bolt to adjust the cutting angle of the saw rope.

[0051] Please continue reading Figure 3 The two pulling assemblies are respectively connected to the two ends of the saw rope 51, and the two pulling assemblies can be firmly connected to the ground through the two bases 56, so as to provide support for the pulling assemblies through the two bases 56. The adjusting bolt 57 is arranged at the connection between the guide block 54 and the base 56. By loosening the adjusting bolt 57, the guide block 54 can change the connection angle with the base 56, and then tightening the adjusting bolt 57 to keep the connection angle between the guide block 54 and the base 56 fixed, so that the cutting direction of the saw rope 51 can be adjusted by adjusting the fixed position of the base 56 and the connection angle between the guide block 54 and the base 56, so that the cutting angle can be adjusted according to the change of the cutting range during the cutting process, so as to ensure the flexible adjustment of the cutting angle and achieve a more precise cutting effect.

[0052] In one embodiment, step S50 includes:

[0053] S51: using a crusher to crush the bridge deck concrete of the ramp bridge within the cutting range, and at the same time, spraying water on the crushing position;

[0054] S52: Use an oxygen-acetylene cutting machine to cut the steel bars at the broken location.

[0055] It should be noted that a crusher is used to crush the bridge deck concrete that has been cut by the wire saw 50. During the crushing process, water is sprayed on the crushing position to suppress dust flying and reduce pollution to the surrounding environment. After the concrete is crushed, an oxygen-acetylene cutter is used to efficiently cut the exposed steel bars, thereby completely dismantling the bridge deck of the entire ramp bridge 20.

[0056] In one embodiment, step S10 includes:

[0057] S11: laying out the line at the connection between the main bridge and the ramp bridge to determine the position to be constructed;

[0058] S12: Chiseling the concrete on the surface of the location to be constructed to expose the structural reinforcement;

[0059] S13: vertically planting the structural reinforcement to form a reinforcement cage;

[0060] S14: pouring concrete on the steel cage to form the crash barrier.

[0061] It should be noted that the crash barrier 30 is used to separate the main bridge 10 from the ramp bridge 20, and the crash barrier 30 serves as a temporary guardrail of the main bridge 10. The crash barrier 30 adopts a reinforced concrete structure, which ensures that the crash barrier 30 has a certain structural strength, so as to provide protection for vehicles passing on the main bridge 10. By implanting the bottom steel bars of the crash barrier 30 into the structural bars of the main bridge 10, the steel bars in the crash barrier 30 are firmly connected with the structural bars of the main bridge 10, and then pouring concrete into the steel cage, the crash barrier 30 and the main bridge 10 form an integrated structure, ensuring that the crash barrier 30 has good structural strength and stability.

[0062] In one embodiment, there are two crash barriers 30 , each crash barrier 30 extends along the extension direction of the main bridge 10 to separate the main bridge 10 from the ramp bridge 20 , and the two crash barriers 30 are spaced apart along the extension direction of the ramp bridge 20 .

[0063] See also Figure 2 Each crash barrier 30 extends along the extension direction of the main bridge 10, and both ends of each crash barrier 30 extend to the guardrails on both sides of the main bridge 10. The two crash barriers 30 are spaced along the extension direction of the ramp bridge 20 to form a continuous protective barrier, further improving the protective performance and providing protection for vehicles passing on the main bridge 10.

[0064] In one embodiment, after step S10, the ramp bridge removal method further includes:

[0065] S101: constructing a protective fence around the pillars of the main bridge; the protective fence is spaced apart from the pillars;

[0066] S102: Fill a protective layer between the protective fence and the pillar.

[0067] It should be noted that the protective fence is formed by a plurality of steel pipes wrapped around the outside of the columns. Each steel pipe extends vertically, and the bottom of each steel pipe extends 0.3m below the ground. The bottom of each steel pipe extends to below the deck of the main bridge 10. The multiple steel pipes are connected by fasteners, and the multiple steel pipes are connected with short steel pipes extending horizontally. The short steel pipes are arranged on the multiple steel pipes to form an integrated protective fence through multiple vertical steel pipes and horizontal short steel pipes. The protective fence serves as the outer protective structure of the column. A protective layer is filled between the protective fence and the column, thereby providing protection for the column of the main bridge 10 and preventing the construction machinery from bumping against the main bridge 10 during the demolition of the ramp bridge 20. In one embodiment, the diameter of the steel pipe is 48mm, the distance between the protective fence and the column is 0.5m, and the protective layer uses anti-collision foam material.

[0068] In one embodiment, after step S10, the ramp bridge removal method further includes:

[0069] S103: using an oxygen-acetylene cutting machine to cut off the railings on the ramp bridge;

[0070] S104: Remove the guardrail on the ramp bridge.

[0071] It can be explained that the lateral concrete protection structure of the ramp bridge 20 is the guardrail, and the metal structure connected to the guardrail is the railing. After the construction of the crash barrier 30 and before the cutting of the main bridge 10 and the ramp bridge 20, the railing on the ramp bridge 20 is first cut off to facilitate the recycling of the railing. Then the guardrail of the concrete structure is broken, and all the auxiliary structures on the ramp bridge 20 are dismantled to facilitate the subsequent demolition of the bridge deck.

[0072] In one embodiment, after step S60, the ramp bridge removal method further includes:

[0073] S61: Applying an anti-rust interface protective agent to the cut surface of the main bridge. It can be understood that by timely carrying out an anti-rust treatment on the cut surface of the main bridge 10 after the ramp bridge 20 is dismantled, the structural safety of the main bridge 10 is ensured. Applying an anti-rust interface protective agent can not only effectively prevent the cut surface from rusting due to exposure, but also extend the service life of the main bridge 10 and maintain the integrity of its overall structure.

[0074] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A ramp bridge demolition method, characterized in that: The ramp bridge is connected to the main bridge, and the ramp bridge removal method comprises the steps of: Constructing a crash barrier at the connection between the main bridge and the ramp bridge; Delineating a cutting line at the connection between the main bridge and the ramp bridge; Drilling a plurality of water drill holes spaced apart along the cutting line using a water drill; Cutting the bridge deck between any two adjacent water drill holes using a wire saw; Breaking the bridge deck of the ramp bridge within the cutting range; Returning to the step of cutting the bridge deck between any two adjacent water-drilled holes by using a wire saw, until the main bridge is completely separated from the ramp bridge; Demolishing the bridge piers and piles of the ramp bridge; The approach road of the ramp bridge is removed.

2. The ramp bridge demolition method according to claim 1, characterized in that: The rope saw machine includes a saw rope and two pulling components, and the pulling components include a fastening block, a guide rail, a guide block and a motor. The guide block is provided with a guide groove, one end of the guide rail is connected to the fastening block, and the other end of the guide rail is passed through the guide groove. The motor is used to drive the guide rail to slide with the corresponding guide block; the two ends of the saw rope are respectively detachably connected to the two fastening blocks.

3. The ramp bridge demolition method according to claim 2, characterized in that: The step of cutting the bridge deck between any two adjacent water drill holes by using a rope saw comprises: Passing the two ends of the saw rope through any two adjacent water drill holes respectively; Connecting two ends of the saw rope to the two fastening blocks respectively, and tightening the saw rope; The two guide rails are driven by the two motors to slide back and forth along the corresponding guide grooves, so as to drive the saw rope to reciprocate and cut the bridge deck.

4. The ramp bridge demolition method according to claim 3, characterized in that: The pulling assembly further includes a base and an adjusting bolt, the guide block is rotatably connected to the base, the adjusting bolt is arranged at the connection between the guide block and the base, and the adjusting bolt is used to adjust the connection angle between the guide block and the base; After the step of respectively connecting the two ends of the saw rope to the two fastening blocks and tightening the saw rope, the ramp bridge removal method further includes: Fixing the base to the ground; The connection angle between the guide block and the base is adjusted by the adjusting bolt to adjust the cutting angle of the saw rope.

5. The ramp bridge demolition method according to claim 1, characterized in that: The step of breaking the bridge deck of the ramp bridge within the cutting range comprises: Using a crusher to crush the bridge deck concrete of the ramp bridge within the cutting range, and at the same time spraying water on the crushing position; Use an oxygen-acetylene cutter to cut away the steel bars at the broken location.

6. The ramp bridge dismantling method according to any one of claims 1 to 5, characterized in that: The step of constructing a crash barrier at the connection between the main bridge and the ramp bridge comprises: Laying out a line at the connection between the main bridge and the ramp bridge to indicate the position to be constructed; Chiseling the concrete on the surface of the location to be constructed to expose the structural reinforcement; Vertically planting the structural reinforcement to form a reinforcement cage; Concrete is poured on the steel cage to form the crash barrier.

7. The ramp bridge dismantling method according to any one of claims 1 to 5, characterized in that: There are two crash barriers, each of which extends along the extension direction of the main bridge to separate the main bridge from the ramp bridge, and the two crash barriers are spaced apart along the extension direction of the ramp bridge.

8. The ramp bridge dismantling method according to any one of claims 1 to 5, characterized in that: After the step of constructing a crash barrier at the connection between the main bridge and the ramp bridge, the ramp bridge removal method further comprises: A protective fence is constructed around the pillars of the main bridge; the protective fence is spaced apart from the pillars; A protective layer is filled between the protective fence and the pillar.

9. The ramp bridge dismantling method according to any one of claims 1 to 5, characterized in that: After the step of constructing a crash barrier at the connection between the main bridge and the ramp bridge, the ramp bridge removal method further comprises: Using an oxygen-acetylene cutting machine to cut off the railings on the ramp bridge; Break down the guardrail on the ramp bridge.

10. The ramp bridge dismantling method according to any one of claims 1 to 5, characterized in that: After returning to the step of cutting the bridge deck between any two adjacent water-bored holes by using a wire saw until the main bridge is completely separated from the ramp bridge, the ramp bridge removal method further includes: An anti-rust interface protective agent is applied on the cut surface of the main bridge.

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