A water bridge demolition device and a bridge demolition method thereof

Abstract

This invention provides a bridge demolition device and method for waterways, comprising a barge equipped with a cutting device. The cutting device includes a cutting support, a rotatable cutting main beam on the cutting support, and a movable cutting mechanism on the cutting main beam. The cutting mechanism includes a cutting line for cutting bridge segments and piers. This invention is applicable to protected waters where blasting is prohibited. The wire cutting process produces no dust and releases no harmful media, meeting the minimum pollution requirements for construction. The cutting main beam can be switched between horizontal and vertical states via a reversing motor. One device can complete the horizontal cutting of bridge segments and the vertical cutting of piers, solving the problem that traditional blasting methods in ecologically protected waters are not conducive to environmental protection and cannot achieve the goal of completing both horizontal and vertical cutting of bridge segments with a single device.

Description

Technical Field

[0001] This invention relates to the field of dismantling abandoned bridges, and in particular to a device and method for dismantling bridges over water. Background Technology

[0002] With increasingly stringent requirements for aquatic ecological protection, special water areas such as drinking water source protection zones and ecological conservation areas are explicitly prohibited from using blasting methods to demolish old bridges. The demolition of bridges in such water areas must strictly adhere to the construction principle of minimizing environmental pollution, and can only employ mechanical cutting processes that are dust-free and release no harmful media.

[0003] Existing equipment and methods for dismantling bridges over water have significant drawbacks: First, most cutting devices can only cut bridge segments and cannot meet the vertical cutting requirements of piers, necessitating equipment replacement, resulting in low efficiency and high operational risks. Second, the cutting line tensioning structure is simplistic, relying solely on passive tensioning, which easily leads to slackness and misalignment of the cutting line, resulting in poor cutting accuracy. Third, the main beam is a fixed structure, making angle switching impossible and failing to simultaneously handle horizontal cutting of bridge segments and vertical cutting of piers. Based on the above-mentioned shortcomings, this solution provides a low-pollution bridge demolition device and method suitable for ecological protection water areas, especially suitable for bridge demolition construction needs where blasting is prohibited. Summary of the Invention

[0004] The main objective of this invention is to provide a bridge demolition device and method for waterways, which solves the problems that traditional blasting methods in ecologically protected waters are not conducive to environmental protection and cannot achieve horizontal cutting of bridge segments and vertical cutting of bridge piers with a single device.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a water bridge demolition device, including a barge, a cutting device on the barge, a cutting support, a rotatable cutting main beam on the cutting support, a movable cutting mechanism on the cutting main beam, and a cutting line in the cutting mechanism for cutting bridge segments and piers.

[0006] In the preferred embodiment, the cutting support includes multiple columns, with crossbeams between the columns and a reversing shaft between the crossbeams. The main cutting beam is rotatably mounted on the reversing shaft.

[0007] In the preferred embodiment, the cutting main beam includes a main beam shell, a reversing motor is provided in the middle of the main beam shell, a double-output shaft reducer is provided at the output shaft end of the reversing motor, the two ends of the double-output shaft reducer are connected to the reversing shaft, and the reversing motor is used to control the cutting main beam to rotate on the reversing shaft; The main beam shell has transverse sliding grooves on both sides, which are used to install the cutting mechanism.

[0008] In the preferred embodiment, the main beam shell is also equipped with a transverse motor 1 and a transverse motor 2. The transverse motor 1 and the transverse motor 2 are arranged in parallel opposite directions. The output shaft end of the transverse motor 1 is equipped with a transverse lead screw 1, and the output shaft end of the transverse motor 2 is equipped with a transverse lead screw 2. The main beam shell has a through groove 1 on the side close to the transverse lead screw 1, and a through groove 2 on the side close to the transverse lead screw 2. The transverse lead screw 1 is used to drive the cutting assembly 1 to move, and the transverse lead screw 2 is used to drive the cutting assembly 2 to move.

[0009] In the preferred embodiment, the cutting mechanism includes a first cutting component and a second cutting component. The first cutting component and the second cutting component have the same structure and are arranged opposite to each other on the main cutting beam. The first cutting component and the second cutting component are equipped with independent power drives.

[0010] In the preferred embodiment, the cutting assembly includes a cutting transverse frame, a transverse guide seat is provided on the inner side of the cutting transverse frame, the transverse guide seat is slidably connected to the transverse slide groove, and cutting guide wheel frames are symmetrically provided on the outer side of the cutting transverse frame, the cutting guide wheel frames are used to guide the direction of the cutting line; A cutting motor is also provided on the side of the cutting guide wheel frame close to the cutting transverse frame. The output shaft end of the cutting motor is equipped with a drive wheel, which is used to drive the cutting line to cut.

[0011] In the preferred embodiment, a transition wheel is provided on one side of the cutting guide wheel frame, and a tensioning groove is provided between the transition wheel and the drive wheel. A slidable tensioning wheel is provided in the tensioning groove, and a pressing wheel is provided on one side of the transition wheel. The pressing wheel is used to cooperate with the transition wheel to press the cutting line. A tension spring is also provided between the tension wheel and the tension groove. The tension spring is used to keep the tension wheel close to the cutting line.

[0012] In the preferred embodiment, a tensioning component is also provided on one side of the cutting component one and the cutting component two. The tensioning component includes a tensioning slide rail, a slidable tensioning slide block is provided on the tensioning slide rail, and a tensioning bottom frame is provided at one end of the tensioning slide rail. A transition wheel 2 is also provided between the tensioning guide rail and the drive wheel.

[0013] In the preferred embodiment, a guide rod is provided on one side of the tensioning bottom frame, the guide rod passes through the tensioning slide, and the tensioning slide is slidably connected to the guide rod; The tensioning slide is equipped with a tensioning pulley, which is used to support the cutting line. A connecting seat is also provided on one side of the tensioning pulley, and a winch is provided on one side of the tensioning bottom frame. The steel cable of the winch is connected to the connecting seat, and the winch is used to pull the tensioning pulley to tension the cutting line.

[0014] The bridge dismantling method using the above-mentioned bridge dismantling device includes: S1. Open lifting holes on the bridge segment to be demolished, then drive the barge under the bridge segment to be demolished, deploy the lifting vehicle in the next stage of the bridge segment to be demolished, and deploy the lifting vessel on one side of the bridge segment to be demolished. S2. Start the transverse motor one and transverse motor two, adjust the cutting component one and cutting component two to the preset cutting position, fit the cutting line, connect the hoisting ship to the section to be hoisted, and connect the hoisting vehicle to the uncut section with multiple steel cables. S3. After the cutting line cuts the section to be lifted, the lifting vessel loads the section to be lifted. After loading is completed, the steel cable between the lifting vehicle and the next section to be lifted is released, so that the section to be lifted is connected to the lifting hole at the release position of the lifting vehicle. S4. After the connection is completed, the section to be lifted is cut off by the cutting line and then loaded onto the lifting vessel. Repeat steps S3-S4 to complete the cutting of the bridge segment. S5. After the bridge segment cutting is completed, start the transverse motor one and transverse motor two to retract to the center, then start the reversing motor to adjust the main beam of the cut beam from horizontal to vertical, and align the cutting component one and cutting component two with the bridge pier. S6. After aligning with the pier, connect the cutting line, connect the hoisting vessel to the upper end of the pier, and then start cutting component one or cutting component two to cut the pier. The cut pier segments are then loaded by the hoisting vessel. S7. Repeat steps S1-S6 to complete the demolition of the bridge over the water.

[0015] This invention provides a device and method for dismantling bridges over water, which has the following beneficial effects: 1. This invention is applicable to protected waters where blasting is prohibited. It uses wire cutting technology, which produces no dust and releases no harmful media, meeting the requirements for minimal pollution during construction. 2. The cutting of the main beam can be switched between horizontal and vertical states by a reversing motor. One set of equipment can complete the horizontal cutting of bridge segments and the vertical cutting of bridge piers. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the construction and hoisting process of this invention; Figure 2 This is a schematic diagram of the hoisting process after the section to be hoisted has been cut according to the present invention; Figure 3 This is a top view schematic diagram of the construction and hoisting process of this invention; Figure 4 This is a schematic diagram of the layout of the cutting mechanism of the present invention; Figure 5 This is a schematic diagram of the retracting cutting mechanism of the present invention; Figure 6This is a schematic diagram of the reversing of the cutting mechanism of the present invention; Figure 7 This is a schematic diagram of the cutting mechanism of the present invention cutting a bridge pier; Figure 8 This is an isometric view of the cutting device of the present invention; Figure 9 This is an internal structural diagram of the main beam of the present invention. Figure 10 This is an isometric view of the cutting assembly of the present invention; Figure 11 This is a schematic diagram of the tensioning wheel of the present invention; Figure 12 This is a schematic diagram of the connection of the cutting lines of the present invention; Figure 13 This is a cross-sectional schematic diagram of the cutting component of the present invention.

[0017] In the diagram: Barge 1; Cutting device 2; Cutting bracket 201; Column 2011; Crossbeam 2012; Reversing shaft 2013; Cutting main beam 202; Main beam shell 2021; Reversing motor 2022; Transverse sliding groove 2023; Slide 1 2024; Transverse sliding screw 1 2025; Transverse sliding motor 1 2026; Transverse sliding motor 2 2027; Slide 2 2028; Transverse sliding screw 2 2029; Cutting assembly 1 203; Cutting guide wheel frame 2030; Cutting transverse sliding frame 2031; Transverse sliding nut seat 2032; Tensioning slide 2033; Transition wheel 1 2034; Transverse sliding Guide seat 2035; tensioning wheel 2036; tensioning spring 2037; cutting line 2038; drive wheel 2039; cutting motor 2040; tensioning assembly 204; tensioning slide rail 2041; transition wheel 2042; guide rod 2043; tensioning slide 2044; tensioning pulley 2045; connecting seat 2046; tensioning base frame 2047; winch 2048; pressure wheel 2049; cutting assembly 205; bridge segment 3; section to be hoisted 301; section to be cut 302; uncut section 303; hoisting hole 304; hoisting vehicle 4; hoisting boat 5; bridge pier 6. Detailed Implementation

[0018] Example 1 like Figure 1-13 As shown, a water bridge demolition device includes a barge 1, a cutting device 2 on the barge 1, a cutting support 201, a rotatable cutting main beam 202 on the cutting support 201, a movable cutting mechanism on the cutting main beam 202, and a cutting line 2038 in the cutting mechanism for cutting bridge segments 3 and piers 6.

[0019] In the preferred embodiment, the cutting support 201 includes multiple columns 2011, with crossbeams 2012 between the columns 2011 and a reversing shaft 2013 between the crossbeams 2012. The cutting main beam 202 is rotatably mounted on the reversing shaft 2013.

[0020] In the preferred embodiment, the cutting main beam 202 includes a main beam shell 2021, a reversing motor 2022 is provided at the middle position of the main beam shell 2021, and a double-output shaft reducer is provided at the output shaft end of the reversing motor 2022. The two ends of the double-output shaft reducer are connected to the reversing shaft 2013. The reversing motor 2022 is used to control the cutting main beam 202 to rotate on the reversing shaft 2013. The main beam shell 2021 has transverse sliding grooves 2023 on both sides, which are used to install the cutting mechanism.

[0021] In the preferred embodiment, the main beam shell 2021 is also equipped with a transverse motor 1 2026 and a transverse motor 2 2027. The transverse motor 1 2026 and the transverse motor 2 2027 are arranged in parallel opposite directions. The output shaft end of the transverse motor 1 2026 is equipped with a transverse lead screw 1 2025, and the output shaft end of the transverse motor 2 2027 is equipped with a transverse lead screw 2 2029. The main beam shell 2021 has a through groove 2024 on the side close to the transverse lead screw 2025, and the main beam shell 2021 has a through groove 2028 on the side close to the transverse lead screw 2028. The transverse lead screw 2025 is used to drive the cutting assembly 203 to move, and the transverse lead screw 2028 is used to drive the cutting assembly 205 to move.

[0022] In the preferred embodiment, the cutting mechanism includes a first cutting component 203 and a second cutting component 205. The first cutting component 203 and the second cutting component 205 have the same structure. The first cutting component 203 and the second cutting component 205 are arranged opposite to each other on the main cutting beam 202. The first cutting component 203 and the second cutting component 205 are equipped with independent power drives.

[0023] In the preferred embodiment, the cutting assembly 203 includes a cutting transverse frame 2031, a transverse guide seat 2035 is provided on the inner side of the cutting transverse frame 2031, the transverse guide seat 2035 is slidably connected to the transverse slide groove 2023, and cutting guide wheel frames 2030 are symmetrically provided on the outer side of the cutting transverse frame 2031, the cutting guide wheel frames 2030 are used to guide the direction of the cutting line 2038; A cutting motor 2040 is also provided on the side of the cutting guide wheel frame 2030 close to the cutting transverse frame 2031. The output shaft end of the cutting motor 2040 is provided with a drive wheel 2039, which is used to drive the cutting line 2038 to cut.

[0024] In the preferred embodiment, a transition wheel 2034 is provided on one side of the cutting guide wheel frame 2030. A tensioning groove 2033 is provided between the transition wheel 2034 and the drive wheel 2039. A slidable tensioning wheel 2036 is provided in the tensioning groove 2033. A pressing wheel 2049 is provided on one side of the transition wheel 2034. The pressing wheel 2049 is used to cooperate with the transition wheel 2034 to press down the cutting line. A tension spring 2037 is also provided between the tensioning wheel 2036 and the tensioning groove 2033. The tension spring 2037 is used to keep the tensioning wheel 2036 close to the cutting line 2038.

[0025] In the preferred embodiment, a tensioning component 204 is also provided on one side of the cutting component 1 203 and the cutting component 205. The tensioning component 204 includes a tensioning slide rail 2041, a slidable tensioning slide block 2044 is provided on the tensioning slide rail 2041, and a tensioning bottom frame 2047 is provided at one end of the tensioning slide rail 2041. A transition wheel 2042 is also provided between the tensioning slide rail 2041 and the drive wheel 2039.

[0026] In the preferred embodiment, a guide rod 2043 is provided on one side of the tensioning base frame 2047, the guide rod 2043 passes through the tensioning slide 2044, and the tensioning slide 2044 is slidably connected to the guide rod 2043; The tensioning slide 2044 is equipped with a tensioning pulley 2045, which is used to support the cutting line 2038. A connecting seat 2046 is also provided on one side of the tensioning pulley 2045. A winch 2048 is provided on one side of the tensioning base frame 2047. The steel cable of the winch 2048 is connected to the connecting seat 2046. The winch 2048 is used to pull the tensioning pulley 2045 to tension the cutting line 2038.

[0027] The bridge dismantling method using the above-mentioned bridge dismantling device includes: S1. Open a hoisting hole on the bridge segment 3 to be demolished, then drive the barge 1 to the bottom of the bridge segment 3 to be demolished, deploy the hoisting vehicle 4 in the next stage of the bridge segment 3 to be demolished, and deploy the hoisting vessel 5 on one side of the bridge segment 3 to be demolished. S2. Start the transverse motor 1 2026 and transverse motor 2 2027, adjust the cutting component 1 203 and cutting component 2 205 to the preset cutting position, and fit the cutting line 2038. The hoisting boat 5 is connected to the section to be hoisted 301, and the hoisting vehicle 4 is connected to the uncut section 303 by multiple steel cables. S3, after the cutting line 2038 cuts the section 301 to be lifted, the lifting vessel 5 loads the section 301 to be lifted. After loading is completed, the steel cable between the lifting vehicle 4 and the next section 301 to be lifted is released, so that the section 301 to be lifted is connected to the lifting hole 304 at the release position of the lifting vehicle 4. S4. After the connection is completed, the section to be lifted 301 is cut off by the cutting line 2038 and then the lifting vessel 5 loads the section to be lifted 301. Repeat steps S3-S4 to complete the cutting of bridge segment 3. S5. After the bridge segment 3 is cut, start the transverse movement motor 1 2026 and transverse movement motor 2 2027 to move them towards the center. Then start the reversing motor 2022 to adjust the main beam 202 from horizontal to vertical. Align the cutting component 1 203 and cutting component 2 205 with the pier 6. S6. After aligning with pier 6, connect the cutting line 2038. Use the hoisting vessel 5 to connect with the upper end of pier 6, and then start the cutting component 1 203 or the cutting component 205 to cut pier 6. The cut pier 6 segments are loaded by the hoisting vessel 5. S7. Repeat steps S1-S6 to complete the demolition of the bridge over the water.

[0028] Example 2 Further explanation in conjunction with Example 1, such as Figure 1-13 The specific implementation method of a bridge demolition device for waterways, as shown in the diagram, is as follows: A barge 1 serves as a platform for waterborne construction, providing a stable foundation for the overall device. A cutting device 2 is fixedly installed on the barge 1, serving as the core execution structure for cutting bridges and piers. The cutting device 2 includes a cutting support 201, which is fixedly installed on the deck of the barge 1. The cutting support 201 includes multiple vertically arranged columns 2011, the bottom of which is fixedly connected to the deck of the barge 1. A crossbeam 2012 is fixedly installed between adjacent columns 2011, forming a stable frame structure. A reversing shaft 2013 is rotatably installed between the crossbeams 2012, with its axis horizontally arranged and perpendicular to the direction of travel of the barge 1.

[0029] A rotatable cutting main beam 202 is mounted on the cutting bracket 201. The cutting main beam 202 is fixedly sleeved on the reversing shaft 2013 and rotates synchronously with the reversing shaft 2013. The cutting main beam 202 includes a main beam shell 2021, which is a hollow rigid shell. A reversing motor 2022 is fixedly mounted in the middle of the main beam shell 2021. A double-output shaft reducer is fixedly mounted on the output shaft end of the reversing motor 2022. The two output shafts of the double-output shaft reducer are fixedly connected to the ends of the reversing shaft 2013. When the reversing motor 2022 is running, it drives the reversing shaft 2013 to rotate after the double-output shaft reducer reduces speed and increases torque. This controls the rotation of the cutting main beam 202 on the reversing shaft 2013, realizing the switching between the horizontal and vertical states of the cutting main beam 202, which is suitable for cutting bridge segments 3 and piers 6 respectively.

[0030] The outer walls on both sides of the main beam shell 2021 are provided with transverse sliding grooves 2023, which extend along the length of the main beam shell 2021 to install the cutting mechanism and provide sliding guidance. Inside the main beam shell 2021, transverse motor 1 2026 and transverse motor 2 2027 are also fixedly installed. Transverse motor 1 2026 and transverse motor 2 2027 are arranged parallel to each other. The output shaft end of transverse motor 1 2026 is fixedly connected to transverse lead screw 1 2025, and the output shaft end of transverse motor 2 2027 is fixedly connected to transverse lead screw 2 2029. Both transverse lead screw 1 2025 and transverse lead screw 2 2029 are arranged along the length of the main beam shell 2021. A through groove 2024 is provided on the side of the main beam shell 2021 close to the transverse lead screw 2025, and a through groove 2028 is provided on the side close to the transverse lead screw 2029. The transverse lead screw 2025 is used to drive the cutting assembly 203 to move, and the transverse lead screw 2029 is used to drive the cutting assembly 205 to move. The through grooves 2024 and 2028 provide through space for the moving connecting parts of the cutting assembly.

[0031] The cutting mechanism includes cutting component 1 203 and cutting component 2 205. Cutting component 1 203 and cutting component 2 205 have the same structure and are arranged opposite each other with the center of the cutting main beam 202 as the center of symmetry. Cutting component 1 203 and cutting component 2 205 are driven by independent power and can move and cut independently.

[0032] Cutting assembly 203 includes a cutting transverse frame 2031. A transverse guide 2035 is fixedly installed on the inner side of the cutting transverse frame 2031. The transverse guide 2035 is slidably engaged with a transverse slide groove 2023 to achieve sliding guidance of the cutting transverse frame 2031 along the main beam shell 2021. Cutting guide wheel frames 2030 are symmetrically arranged on the outer side of the cutting transverse frame 2031. The cutting guide wheel frames 2030 are used to guide the direction of the cutting line 2038 and ensure that the cutting line 2038 runs along a preset trajectory. A cutting motor 2040 is fixedly installed on one side of the cutting guide wheel frame 2030 close to the cutting transverse frame 2031. A drive wheel 2039 is fixedly installed at the output shaft end of the cutting motor 2040. The drive wheel 2039 and the cutting line 2038 are driven by friction. The cutting motor 2040 drives the drive wheel 2039 to rotate, which in turn drives the cutting line 2038 to run in a cycle to realize the cutting operation. The cutting line 2038 adopts the conventional wire cutting material in the construction industry and is suitable for cutting concrete and reinforced concrete.

[0033] A transition wheel 2034 is rotatably mounted on one side of the cutting guide wheel frame 2030. The transition wheel 2034 is used to change the direction of the cutting line 2038. A tensioning groove 2033 is formed on the cutting guide wheel frame 2030 between the transition wheel 2034 and the drive wheel 2039. A slidable tensioning wheel 2036 is installed in the tensioning groove 2033. A tensioning spring 2037 is fixedly installed between the tensioning wheel 2036 and the tensioning groove 2033. The tensioning spring 2037 is always in a compressed state, pushing the tensioning wheel 2036 to press against the cutting line 2038, compensating for the slack of the cutting line 2038 in real time, and realizing the automatic tensioning of the cutting line 2038. A pressure wheel 2049 is also rotatably mounted on the lower part of the cutting guide wheel frame 2030. The pressure wheel 2049 cooperates with the transition wheel 2034 to press the cutting line 2038 and prevent the cutting line 2038 from leaving the guide wheel track during operation.

[0034] Tensioning components 204 are provided on one side of both cutting component 1 203 and cutting component 2 205. Each tensioning component 204 includes a tensioning slide rail 2041, which is fixed to the outside of the cutting guide wheel frame 2030. A slidable tensioning slide seat 2044 is provided on the tensioning slide rail 2041, and a tensioning base frame 2047 is fixedly provided at one end of the tensioning slide rail 2041. A transition wheel 2042 is rotatably provided between the tensioning slide rail 2041 and the drive wheel 2039, guiding the cutting line 2038 to wind around the tensioning pulley 2045. A guide rod 2043 is fixedly provided on one side of the tensioning base frame 2047, passing through the tensioning slide seat 2044. The tensioning slide seat 2044 is slidably connected to the guide rod 2043, ensuring smooth and unbiased sliding of the tensioning slide seat 2044. Tensioning pulley 2045 is rotatably mounted on tensioning slide 2044. Tensioning pulley 2045 is used to support cutting wire 2038. Connecting seat 2046 is fixedly mounted on one side of tensioning slide 2044. Winch 2048 is fixedly mounted on one side of tensioning base frame 2047. The steel cable of winch 2048 is fixedly connected to connecting seat 2046. When winch 2048 winds up steel cable, it pulls tensioning slide 2044 to move along tensioning slide rail 2041, which drives tensioning pulley 2045 to tension cutting wire 2038, realizing secondary tensioning of cutting wire 2038 and improving cutting accuracy.

[0035] The specific steps are as follows: S1. Pre-drill lifting holes on the bridge segment 3 to be demolished, drive the barge 1 to the waters below the bridge segment 3 to be demolished, deploy the lifting vehicle 4 on the lower side of the bridge segment 3, and deploy the lifting vessel 5 on the waters on one side of the bridge segment 3 to complete the placement of the construction equipment.

[0036] S2. Start the transverse movement motor 1 2026 and transverse movement motor 2 2027. Transverse movement motor 1 2026 drives transverse movement screw 1 2025 to rotate, which drives cutting component 1 203 to move along transverse movement slide 2023. Transverse movement motor 2 2027 drives transverse movement screw 2 2029 to rotate, which drives cutting component 2 205 to move. After adjusting the two cutting components to the preset cutting position, the cutting line 2038 is set. The hoisting boat 5 is fixedly connected to the section to be hoisted 301. The hoisting vehicle 4 is connected to the uncut section 303 through multiple steel cables to realize the fixation and hoisting preparation of the section to be cut.

[0037] S3. Start the cutting motor 2040. The cutting motor 2040 drives the drive wheel 2039 to drive the cutting line 2038 to run in a cycle. The tension spring 2037 pushes the tension wheel 2036 to press against the cutting line 2038 in real time, completing the first-level automatic tensioning. At the same time, start the winch 2048 to pull the tension pulley 2045 to achieve the second-level tensioning of the cutting line 2038. The cutting line 2038 stably cuts the section 301 to be lifted. The cut section 301 to be lifted is loaded by the lifting vessel 5. After loading, the steel cable between the lifting vehicle 4 and the next section 301 to be lifted is released, and the section 301 to be lifted is reconnected to the lifting hole 304 at the release position of the lifting vehicle 4.

[0038] S4. After the connection is completed, the cutting assembly is started again. The next segment 301 to be lifted is cut off by the cutting line 2038 and loaded by the lifting vessel 5. The segment cutting, lifting and connection operations of steps S3 to S4 are repeated to complete the cutting work of the entire bridge segment 3.

[0039] S5. After all bridge segments 3 are cut, start the transverse movement motor 1 2026 and transverse movement motor 2027 to move the cutting components 1 203 and 205 towards the middle of the main beam 202 to avoid interference with the pier 6. Then start the reversing motor 2022. The reversing motor 2022 drives the reversing shaft 2013 to rotate through the double output shaft reducer, smoothly adjusting the main beam 202 from a horizontal state to a vertical state, so that the cutting components 1 203 and 205 are precisely aligned with the pier 6.

[0040] S6. After the angle of the main beam 202 is adjusted, the cutting line 2038 is reconnected and fixedly connected to the upper end of the pier 6. The cutting component 1 203 or the cutting component 2 205 is started, and the pier 6 is vertically cut in conjunction with the double-stage tensioning structure of the cutting line 2038. The cut pier 6 segments are loaded and transported by the lifting vessel 5.

[0041] S7. Following the construction logic of steps S1 to S6, complete the cutting and hoisting operations of bridge segment 3 and pier 6 one by one, repeating the cycle until the low-pollution demolition of the entire water bridge is completed.

[0042] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A device for dismantling a bridge over water, comprising a barge (1), characterized in that: The barge (1) is equipped with a cutting device (2), which includes a cutting bracket (201), a rotatable cutting main beam (202) on the cutting bracket (201), a movable cutting mechanism on the cutting main beam (202), and a cutting line (2038) in the cutting mechanism. The cutting line (2038) is used to cut bridge segments (3) and piers (6).

2. The device for dismantling a bridge over water according to claim 1, characterized in that: The cutting support (201) includes multiple columns (2011), with crossbeams (2012) between the columns (2011) and a reversing shaft (2013) between the crossbeams (2012). The cutting main beam (202) is rotatably mounted on the reversing shaft (2013).

3. The device for dismantling a bridge over water according to claim 1, characterized in that: The cutting main beam (202) includes a main beam shell (2021), and a reversing motor (2022) is provided in the middle of the main beam shell (2021). The output shaft end of the reversing motor (2022) is provided with a double-output shaft reducer. The two ends of the double-output shaft reducer are connected to the reversing shaft (2013). The reversing motor (2022) is used to control the cutting main beam (202) to rotate on the reversing shaft (2013). The main beam shell (2021) is provided with transverse sliding grooves (2023) on both sides, which are used to install the cutting mechanism.

4. The device for dismantling a bridge over water according to claim 3, characterized in that: The main beam shell (2021) is also equipped with a transverse motor 1 (2026) and a transverse motor 2 (2027). The transverse motor 1 (2026) and the transverse motor 2 (2027) are arranged in parallel opposite directions. The output shaft end of the transverse motor 1 (2026) is equipped with a transverse lead screw 1 (2025), and the output shaft end of the transverse motor 2 (2027) is equipped with a transverse lead screw 2 (2029). The main beam shell (2021) has a through groove (2024) on the side close to the transverse lead screw (2025), and the main beam shell (2021) has a through groove (2028) on the side close to the transverse lead screw (2028). The transverse lead screw (2025) is used to drive the cutting assembly (203) to move, and the transverse lead screw (2028) is used to drive the cutting assembly (205) to move.

5. The device for dismantling a bridge over water according to claim 1, characterized in that: The cutting mechanism includes cutting component one (203) and cutting component two (205). Cutting component one (203) and cutting component two (205) have the same structure. Cutting component one (203) and cutting component two (205) are arranged opposite to each other on the cutting main beam (202). Cutting component one (203) and cutting component two (205) are equipped with independent power drives.

6. The device for dismantling a bridge over water according to claim 5, characterized in that: The cutting assembly (203) includes a cutting transverse frame (2031), a transverse guide (2035) is provided on the inner side of the cutting transverse frame (2031), the transverse guide (2035) is slidably connected to the transverse slide (2023), and a cutting guide wheel frame (2030) is symmetrically provided on the outer side of the cutting transverse frame (2031). The cutting guide wheel frame (2030) is used to guide the direction of the cutting line (2038). A cutting motor (2040) is also provided on the side of the cutting guide wheel frame (2030) close to the cutting transverse frame (2031). The output shaft end of the cutting motor (2040) is provided with a drive wheel (2039), which is used to drive the cutting line (2038) to cut.

7. The device for dismantling a bridge over water according to claim 6, characterized in that: A transition wheel (2034) is provided on one side of the cutting guide wheel frame (2030). A tensioning groove (2033) is provided between the transition wheel (2034) and the drive wheel (2039). A slidable tensioning wheel (2036) is provided in the tensioning groove (2033). A pressing wheel (2049) is provided on one side of the transition wheel (2034). The pressing wheel (2049) is used to cooperate with the transition wheel (2034) to press the cutting line. A tension spring (2037) is also provided between the tension wheel (2036) and the tension groove (2033). The tension spring (2037) is used to keep the tension wheel (2036) close to the cutting line (2038).

8. The device for dismantling a bridge over water according to claim 5, characterized in that: One side of the cutting component 1 (203) and the cutting component 2 (205) is also provided with a tensioning component (204). The tensioning component (204) includes a tensioning slide rail (2041), a slidable tensioning slide block (2044) is provided on the tensioning slide rail (2041), and a tensioning bottom frame (2047) is provided at one end of the tensioning slide rail (2041). A transition wheel (2042) is also provided between the tensioning slide rail (2041) and the drive wheel (2039).

9. The device for dismantling a bridge over water according to claim 8, characterized in that: A guide rod (2043) is provided on one side of the tensioning bottom frame (2047). The guide rod (2043) passes through the tensioning slide (2044), and the tensioning slide (2044) is slidably connected to the guide rod (2043). The tensioning slide (2044) is equipped with a tensioning pulley (2045), which is used to support the cutting line (2038). A connecting seat (2046) is also provided on one side of the tensioning pulley (2045). A winch (2048) is provided on one side of the tensioning base frame (2047). The steel cable of the winch (2048) is connected to the connecting seat (2046). The winch (2048) is used to pull the tensioning pulley (2045) to tension the cutting line (2038).

10. A bridge dismantling method using a bridge dismantling device according to any one of claims 1-9, characterized in that: The method includes: S1. Open a hoisting hole on the bridge segment (3) to be demolished, then drive the barge (1) to the bottom of the bridge segment (3) to be demolished, and set up a hoisting vehicle (4) in the next stage of the bridge segment (3) to be demolished, and set up a hoisting boat (5) on one side of the bridge segment (3) to be demolished. S2. Start the transverse motor one (2026) and transverse motor two (2027), adjust the cutting component one (203) and cutting component two (205) to the preset cutting position, and fit the cutting line (2038). The hoisting boat (5) is connected to the section to be hoisted (301), and the hoisting vehicle (4) is connected to the uncut section (303) by multiple steel cables. S3, after the cutting line (2038) cuts the section to be lifted (301), the lifting vessel (5) loads the section to be lifted (301). After loading is completed, the steel cable between the lifting vehicle (4) and the next section to be lifted (301) is released, so that the section to be lifted (301) is connected to the lifting hole (304) at the release position of the lifting vehicle (4). S4. After the connection is completed, the section to be lifted (301) is cut off by the cutting line (2038) and then the section to be lifted (301) is loaded by the lifting ship (5). Repeat steps S3-S4 to complete the cutting of the bridge segment (3). S5. After the bridge segment (3) is cut, start the transverse motor one (2026) and transverse motor two (2027) to move towards the center, and then start the reversing motor (2022) to adjust the main beam (202) from horizontal to vertical, and align the cutting component one (203) and cutting component two (205) with the pier (6). S6. After aligning with the pier (6), connect the cutting line (2038), use the hoisting vessel (5) to connect with the upper end of the pier (6), and then start the cutting component one (203) or the cutting component two (205) to cut the pier (6). The cut pier (6) segments are loaded by the hoisting vessel (5). S7. Repeat steps S1-S6 to complete the demolition of the bridge over the water.

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