Cable bearing type bridge demolition device adopting closed track and construction method of cable bearing type bridge demolition device

Abstract

The invention discloses a cable bearing type bridge demolition device adopting closed rails and a construction method.The cable bearing type bridge demolition device comprises two sets of assembly type supporting frames and a plurality of rail trolley assemblies, the two sets of assembly type supporting frames are oppositely distributed and arranged across a bridge, and the closed double rails are arranged on the assembly type supporting frames; rail wheels corresponding to the closed double rails are arranged at the bottoms of the rail trolley assemblies, the axis direction of the rail wheels is perpendicular to the closed double rails, rail grooves are formed in the closed double rails, the rail wheels are inserted into the rail grooves along one ends of the closed double rails, and limiting structures for limiting the rail wheels are arranged in the rail grooves. The rail wheels can move in the length direction of the rail grooves, and vertical movement of the rail wheels can be limited through the limiting structures. A bridge is divided into a plurality of to-be-disassembled bridge blocks according to the span, the bridge is cut into the plurality of to-be-disassembled bridge blocks, and the plurality of rail trolley assemblies move on the rails to sequentially hoist the to-be-disassembled bridge blocks connected with the rail trolley assemblies to the adjacent bridge abutments and crush and decompose the to-be-disassembled bridge blocks.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and in particular to a cable-supported bridge demolition device using a closed track and a construction method. Background Art

[0002] With the rapid development of my country's transportation industry, due to the influence of natural aging, heavy traffic, climate environment or natural disasters, many bridges have various quality and safety problems within their designed service life. In addition, the surge in traffic volume in recent years and the frequent occurrence of illegal overloading of heavy transport vehicles have made many bridges unable to adapt to the current surge in transportation needs and are in an overloaded operation state, which further reduces the durability and safety of bridge structures. Therefore, the service life of many bridges has been greatly shortened, and the service performance of bridges has gradually declined with the increase in service life, and even leads to the premature end of their service life. Although some bridges have undergone comprehensive technical transformation, they are still in a "sick" working state and still cannot meet the requirements of modern transportation development for bridge bearing capacity. First, many bridges built in the early stage have become obsolete due to aging, and even cracks have appeared. If they continue to be used, it is very likely to cause safety accidents, so they need to be demolished and rebuilt; second, on some major traffic routes, due to the increase in traffic volume and vehicle load, the traffic capacity and bearing capacity of the original bridges have become bottlenecks restricting local economic development, so bridges need to be rebuilt; third, in some urban construction, some old bridges and old bridges no longer meet the urban planning and layout. These bridges or bridge components that need to be retired from history are usually demolished or dismantled for recycling.

[0003] At present, the bridge engineering community has accumulated certain experience in bridge demolition design theory, construction methods and technologies. In particular, in recent years, with the research, development and utilization of static cutting technology, crushing technology, jacking technology and hoisting technology, some new construction technologies that can be used for bridge demolition have emerged. However, the demolition equipment and construction technology for bridges with restricted spaces below (i.e., when the lower part of the bridge is inaccessible, such as crossing a high canyon, the lower river cannot be supported due to navigation, flood control, etc., and the lower river management department does not allow temporary support to be set up) are still unclear.

[0004] In addition, the bridge-building machine can be used for the demolition of such bridges after modification, but the installation and removal costs of the bridge-building machine for bridge demolition are expensive, and the construction efficiency is low. Summary of the invention

[0005] In view of the above technical problems in the demolition of bridges with limited lower space, the purpose of the present invention is to provide a closed track cable-supported bridge demolition device and construction method. This solution can realize the efficient demolition of large-span bridges with limited lower space, eliminating the need to set up multiple lower supports or even use large bridge erection machines and other construction equipment in the traditional large-span bridge demolition process, thereby realizing bridge demolition and saving construction costs to a certain extent;

[0006] In addition, this solution adopts a closed double track to be connected with the track wheel, and a limiting structure for limiting the track wheel is provided in the track groove. The limiting structure can limit the vertical movement of the track wheel, so that the track trolley assembly has high stability when moving during the dismantling process, which can improve the reliability of the device.

[0007] In order to achieve the above-mentioned purpose, the cable-supported bridge dismantling device of the closed track provided by the present invention comprises two groups of assembled support frames and a plurality of track trolley assemblies, wherein the two groups of assembled support frames are relatively distributed and arranged across the bridge, the assembled support frames are provided with a closed double track, the bottom of the plurality of track trolley assemblies are provided with track wheels corresponding to the closed double track, the axis direction of the track wheels is perpendicular to the closed double track, the closed double track is provided with a track groove, the track wheel is inserted into the track groove along one end of the closed double track, a limiting structure for limiting the track wheel is provided in the track groove, the track wheel can move along the length direction of the track groove, and the vertical movement of the track wheel can be limited by the limiting structure;

[0008] The bridge is divided into a number of bridge blocks to be demolished according to the span. Among the number of bridge blocks to be demolished, except for the first and last bridge blocks to be demolished with piers at the bottom, the other bridge blocks to be demolished correspond to the number of rail trolley assemblies. The rail trolley assemblies are connected to the bridge blocks to be demolished through cables. By cutting the bridge into a number of bridge blocks to be demolished, the number of rail trolley assemblies move on the rails to lift the bridge blocks to be demolished connected thereto to the nearby abutments in turn and crush them.

[0009] Furthermore, the assembled support frame includes a first frame and a second frame. The first frame and the second frame are symmetrically distributed on the left and right sides of the bridge respectively. The bottom of one end of the first frame and the second frame is respectively provided with a rotating device connected to the abutment, and the other end of the first frame and the second frame are connected in a detachable manner.

[0010] Furthermore, the first frame and the second frame have the same structure, both comprising a horizontal frame and a vertical frame, the horizontal frame is arranged horizontally, a closed double track is arranged on the top, and a track groove is arranged in the closed double track, on which the track trolley assembly can be arranged;

[0011] The vertical frame is connected to one end of the horizontal frame, and a rotating device is provided at the bottom of the vertical frame. The rotating device is connected to the abutment, and the vertical frame can be rotated by the rotating device;

[0012] The cross frame of the first frame body is butted against the cross frame of the second frame body at the center of the bridge span and connected via a connecting pin.

[0013] Furthermore, the rail trolley assembly is composed of a first lifting trolley and a second lifting trolley having the same structure;

[0014] The first lifting trolley and the second lifting trolley both include a vehicle body, both sides of which extend vertically downward to form a connecting portion, and the connecting portion is connected to the rail wheel.

[0015] Two rotating shafts are provided at both ends of the bottom of the vehicle body, and cables are connected to the two rotating shafts respectively.

[0016] The first lifting trolley and the second lifting trolley are movably arranged on the closed double tracks in the two sets of assembled support frames through track wheels, and the cables on the two rotating shafts in the first lifting trolley cooperate with the cables on the two rotating shafts in the second lifting trolley to be hung on the four corners of the bridge block to be demolished.

[0017] The first lifting trolley and the second lifting trolley are equipped with a control device, a power device and a lifting device, and the first lifting trolley and the second lifting trolley respectively realize synchronous travel along two closed double tracks;

[0018] The power device is connected to the track wheel to provide driving force for the track wheel. The lifting device is connected to the two rotating shafts respectively and can drive the rotating shafts to rotate, so that the cable can be lifted and lowered vertically. The cable drives the bridge block to be demolished to move vertically. The control device is connected to the power device and the lifting device respectively and is used to control the power device and the lifting device.

[0019] Furthermore, the closed double track includes a first track and a second track, the first track and the second track are arranged on the top of the cross frame along the length direction of the cross frame, and the first track and the second track are arranged parallel to each other, and the first track and the second track are respectively connected with the track wheels on both sides of the vehicle body;

[0020] The first track and the second track have the same structure, both comprising a horizontally arranged bottom plate and vertical plates vertically connected to both sides of the bottom plate, wherein the bottom plate and the vertical plates are connected to form a C-shaped track groove for the track wheel to be placed;

[0021] The side walls opposite to the two vertical plates are vertically provided with first limit plates, and a gap is provided between the two first limit plates. The track wheel is composed of an upper wheel rim, a lower wheel rim, and a wheel rim connecting portion connected between the upper wheel rim and the lower wheel rim. The upper wheel rim and the lower wheel rim connecting portion form an I-shape through a connecting cross section, and a slot is formed between the upper wheel rim and the lower wheel rim.

[0022] The track wheel is located in the gap between the two first limit plates, and the two first limit plates are respectively located on both sides of the track wheel and are respectively inserted in the slots between the upper wheel rim and the lower wheel rim, so that the track wheel can move along the length direction of the first limit plates by rotating, and the first limit plates are engaged with the slots to limit the vertical movement of the track wheel, thereby preventing the track wheel from falling off.

[0023] Furthermore, the free ends of the two vertical plates extend toward each other to form second limit plates, and the two second limit plates are respectively located on both sides of the connecting part, and the two second limit plates are respectively matched with the connecting part in a clearance to limit the horizontal movement of the connecting part.

[0024] In order to achieve the above object, the present invention provides a construction method of a cable-supported bridge demolition device using a closed track, which is used for any one of the above items, and the construction method comprises:

[0025] S1: Determine the span of the bridge to be dismantled, the length and position of each bridge block to be dismantled, the weight of each bridge block to be dismantled, the construction period, etc. according to the design drawings. According to the above factors and the calculation of the structural bearing capacity, determine the structural span, rod type, assembly form, number of bridge blocks to be dismantled, number of rail trolley assemblies, wheelbase of each rail trolley assembly, lifting power tonnage, driving power tonnage and other parameters of the assembled support frame;

[0026] S2: Use a small truck crane to install the assembled support frame and the closed double track, use a boom truck to install the track trolley assembly and cables, and fix the two ends of the lifting cable on the two rotating shafts of the lifting trolley after passing through the bottom of the bridge block to be demolished. After the above work is completed, use a diamond wire saw to cut the bridge according to the designed split seam position according to the design requirements and position;

[0027] S3: Use a truck crane to lift the two bridge blocks to be demolished from the top of the piers on the left and right sides at the abutment or roadbed, and then crush and decompose them. After the crushing and decomposition is completed, use an excavator and a dump truck to transport the crushed garbage out;

[0028] S4: The two rail trolley assemblies located on the outside respectively lift the corresponding bridge blocks to be dismantled and drive along the closed double tracks to the abutments on both sides. During the process, the lifting device rotates the two rotating shafts of the lifting trolleys to simultaneously lift the segmented bridge blocks to be dismantled upwards, and the lifting height is ensured not to touch the abutments;

[0029] S5: After the two rail trolley assemblies on the outside reach the top of the abutment, they slowly lower the bridge blocks to be dismantled to the abutment and then crush them. After the crushing is completed, the crushed garbage is transported out using an excavator and a dump truck, and the corresponding rail trolley assemblies are removed at the same time;

[0030] S6: Repeat the above S4-S5 until the remaining bridge blocks to be demolished are dismantled, lifted away, and crushed;

[0031] S7: disconnecting the cross frame of the first frame from the cross frame of the second frame, and then rotating the rotating devices at one end of the first frame and the second frame to turn the first frame and the second frame to the shore for dismantling and recycling.

[0032] The cable-supported bridge demolition device and construction method of the closed track provided by the present invention can realize the efficient demolition of a large-span bridge with limited lower space, eliminating the need to set up multiple lower supports or even use large-scale bridge erection machines and other construction equipment in the traditional large-span bridge demolition process, thereby realizing bridge demolition and saving construction costs to a certain extent;

[0033] In addition, this solution adopts a closed double track to be connected with the track wheel, and a limiting structure for limiting the track wheel is provided in the track groove. The limiting structure can limit the vertical movement of the track wheel, so that the track trolley assembly has high stability when moving during the dismantling process, which can improve the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] Figure 1 A schematic diagram of the overall structure of a cable-supported bridge demolition device using a closed track provided by the present invention;

[0036] Figure 2 A schematic side structural view of a cable-supported bridge demolition device using a closed track provided by the present invention;

[0037] Figure 3 A schematic structural diagram of a first lifting trolley in a cable-supported bridge demolition device using a closed track provided by the present invention;

[0038] Figure 4 A schematic structural diagram of a first track in a cable-supported bridge demolition device using a closed track provided by the present invention;

[0039] Figure 5 A schematic diagram of the first lifting trolley of the cable-supported bridge demolition device using a closed track provided by the present invention being connected in coordination with the closed double track;

[0040] Figure 6 A schematic diagram of step 3 in the construction method of the cable-supported bridge demolition device using a closed track provided by the present invention;

[0041] Figure 7 A schematic diagram of step 4 in the construction method of the cable-supported bridge demolition device using a closed track provided by the present invention;

[0042] Figure 8 A schematic diagram of step 5 in the construction method of the cable-supported bridge demolition device using a closed track provided by the present invention.

[0043] Illustration Description:

[0044] Assembled support frame 100, rail trolley assembly 200, bridge block to be dismantled 300;

[0045] The first frame 110, the horizontal frame 111, the vertical frame 112, the second frame 120, the closed double track 130, the first track 131, the bottom plate 131a, the vertical plate 131b, the first limit plate 131d, the second limit plate 131e, the second track 132, the rotating device 140, the first track trolley assembly 201, the second track trolley assembly 202, the third track trolley assembly 203, the fourth track trolley assembly 204, the first lifting Lifting trolley 210, vehicle body 211, connecting part 212, track wheel 213, upper wheel rim 213a, lower wheel rim 213b, wheel rim connecting part 213c, slot 213d, rotating shaft 214, cable 215, second lifting trolley 220, first bridge block to be demolished 310, second bridge block to be demolished 320, third bridge block to be demolished 330, fourth bridge block to be demolished 340, fifth bridge block to be demolished 350, sixth bridge block to be demolished 360. DETAILED DESCRIPTION

[0046] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific diagrams.

[0047] See also Figure 1-Figure 5 , which is a schematic structural diagram of the cable-supported bridge demolition device on a closed track provided by the present invention.

[0048] As can be seen from the drawings, the cable-supported bridge demolition device on a closed track provided by the present invention includes two components: two sets of assembled support frames 100 and a plurality of track trolley assemblies 200.

[0049] Two groups of assembled support frames 100 are relatively distributed and arranged across the bridge, and a closed double track 130 is arranged on the assembled support frames 100;

[0050] A plurality of track trolley assemblies 200 are provided with track wheels 213 corresponding to the closed double track 130 at the bottom, and the axis direction of the track wheels 213 is perpendicular to the closed double track 130. The closed double track 130 is provided with a track groove, and the track wheel is inserted into the track groove along one end of the closed double track 130. A limiting structure for limiting the track wheel 213 is provided in the track groove, and the track wheel 213 can move along the length direction of the track groove, and the vertical movement of the track wheel 213 can be limited by the limiting structure.

[0051] The bridge is divided into a number of bridge blocks 300 to be dismantled according to the span. Among the bridge blocks 300 to be dismantled, except for the first and last bridge blocks 300 to be dismantled with piers at the bottom, the remaining bridge blocks 300 to be dismantled correspond to a number of rail trolley assemblies 200, and the rail trolley assemblies 200 are connected to the bridge blocks 300 to be dismantled through cables 215. By cutting the bridge into a number of bridge blocks 300 to be dismantled, the rail trolley assemblies 200 move on the closed double track 130 to lift the bridge blocks 300 to be dismantled connected thereto to the nearby abutments in turn and break them up.

[0052] Furthermore, if Figure 1 The assembled support frame 100 includes a first frame 110 and a second frame 120. The first frame 110 and the second frame 120 are symmetrically distributed on the left and right sides of the bridge, respectively. A rotating device 140 is provided at the bottom of one end of the first frame 110 and the second frame 120 to be connected to the abutment, and the other ends of the first frame 110 and the second frame 120 are connected in a detachable manner.

[0053] Compared with the existing technology, this solution can realize the efficient demolition of large-span bridges with limited lower space, eliminating the need to set up multiple lower supports or even use large bridge erection machines and other construction equipment in the traditional large-span bridge demolition process, thereby realizing bridge demolition and saving construction costs to a certain extent;

[0054] In this solution, the rail trolley assembly 200 is arranged in the track groove of the closed double track 130 through the rail wheel 213. The limit structure in the track groove can limit the vertical movement of the rail wheel 213, so that the rail trolley assembly 200 has no derailment risk, has a large bearing capacity, and can improve the stability of the trolley during driving, reducing the risk of instability of the bridge to be demolished under construction caused by the left and right shaking of the wheels when driving on the traditional type of track.

[0055] Specifically, Figure 1 , Figure 2 The first frame 110 and the second frame 120 have the same structure, and both include a horizontal frame 111 and a vertical frame 112. The horizontal frame 111 is horizontally arranged, and a closed double track 130 is arranged on the top thereof. The closed double track 130 is provided with a track groove, and the track trolley assembly 200 can be arranged thereon;

[0056] The vertical frame 112 is connected to one end of the horizontal frame 111. A rotating device 140 is provided at the bottom of the vertical frame 112. The rotating device 140 is connected to the abutment. The vertical frame 112 can be rotated by the rotating device 140.

[0057] The cross frame 111 of the first frame 110 and the cross frame 111 of the second frame 120 are butted against each other at the center of the bridge span and are preferably connected by a connecting pin.

[0058] Furthermore, if Figure 1 As shown, in this example, a large span bridge to be demolished is divided into six bridge blocks 300 to be demolished for cutting and separation, namely a first bridge block 310 to be demolished, a second bridge block 320 to be demolished, a third bridge block 330 to be demolished, a fourth bridge block 340 to be demolished, a fifth bridge block 350 to be demolished, and a sixth bridge block 360 to be demolished;

[0059] The first bridge block 310 to be demolished and the sixth bridge block 360 to be demolished are provided with bridge piers at the bottom;

[0060] Corresponding to the second bridge block 320 to be demolished, the third bridge block 330 to be demolished, the fourth bridge block 340 to be demolished, and the fifth bridge block 350 to be demolished, in this example, there are provided a first rail trolley assembly 201, a second rail trolley assembly 202, a third rail trolley assembly 203, and a fourth rail trolley assembly 204;

[0061] Assuming the span of the bridge is L (the distance between the expansion joints at both ends of the bridge), the length of the two blocks on the top of the piers on both sides is recommended to be 0.5m + bearing width + 0.5m, and the length of the remaining blocks is determined according to the design and calculation requirements. Assuming the lengths of each block are L1, L2, L3, L4, L5, L6, (L1+L2+L3+L4+L5+L6=L, and assuming Lmax=Max(L1, L2, L3, L4, L5, L6)); the structural span of the assembled support frame 100 is designed to be Lmax+L+Lmax; the wheelbase of the rail trolley assembly 200 is the length of the segmented block that the trolley needs to lift minus 1m. Taking the wheelbase of the first rail trolley assembly 201 lifting the second bridge block 320 to be dismantled as an example, the wheelbase of the first rail trolley assembly 201 should be adjusted to: L2 car=L2-1.

[0062] In such actual application, a small truck crane is used to install the assembled support frame 100, and the length of the assembled support frame 100 exceeding the expansion joint on each side is controlled to be Lmax; then the rail trolley assembly 200 and the cable 215 are installed, and the position of the lifting trolley and the cable 215 is controlled to be 0.5m away from the position of each partition joint to ensure construction safety.

[0063] In actual application of this example, the first bridge block 310 to be dismantled and the sixth bridge block 360 to be dismantled on the tops of the bridge piers on the left and right sides are first lifted off and then broken and decomposed. Figure 6 As shown, after the crushing and decomposition is completed, the crushed garbage is transported out using excavators and dump trucks.

[0064] The first rail trolley assembly 201 and the fourth rail trolley assembly 204 are responsible for lifting the second bridge block 320 to be demolished and the fifth bridge block 350 to be demolished, respectively lifting the corresponding bridge blocks to be demolished, and driving along the closed double track 130 to the abutment position. The construction steps are as follows: Figure 7 shown.

[0065] The first rail trolley assembly 201 is responsible for lifting the second bridge block 320 to be demolished and the fifth bridge block 350 to be demolished. After the fourth rail trolley assembly 204 reaches the top of the abutment, it slowly lowers the second bridge block 320 to be demolished and the fifth bridge block 350 to the abutment, and then crushes them. After the crushing is completed, an excavator and a dump truck are used to transport the crushed garbage out, and the corresponding lifting trolley is removed at the same time, such as Figure 8 shown.

[0066] Finally, the remaining third bridge block 330 and the fourth bridge block 340 to be demolished are dismantled, lifted off and crushed by the second rail trolley assembly 202 and the third rail trolley assembly 203. If there are more blocks, the same steps can be followed to repeat the dismantling, lifting and crushing of the remaining blocks until all the blocks are dismantled.

[0067] Specifically, Figure 2 , Figure 3 In this solution, the rail trolley assembly 200 is specifically composed of a first lifting trolley 210 and a second lifting trolley 220 having the same structure;

[0068] The first lifting trolley 210 and the second lifting trolley 220 both include a vehicle body 211. Both sides of the vehicle body 211 extend vertically downward to form a connecting portion 212. The connecting portion 212 is connected to a track wheel 213.

[0069] Two shafts 214 are provided at both ends of the bottom of the vehicle body 211, and cables 215 are connected to the two shafts 214 respectively.

[0070] In this way, the first lifting trolley 210 and the second lifting trolley 220 are movably arranged on the closed double tracks 130 in the two sets of assembled support frames 100 through the track wheels 213, and the cables 215 on the two rotating shafts 214 in the first lifting trolley 210 cooperate with the cables 215 on the two rotating shafts 214 in the second lifting trolley 220 to be hung on the four corners of the bridge block 300 to be demolished, so that the stability of the bridge block 300 to be demolished can be ensured when it moves;

[0071] The first lifting trolley 210 and the second lifting trolley 220 are equipped with a control device, a power device and a lifting device, and the first lifting trolley 210 and the second lifting trolley 220 are respectively driven synchronously along two closed double tracks 130;

[0072] The power unit is connected to the track wheel 213 to provide driving force for the track wheel 213. The lifting device is connected to the two rotating shafts 214 respectively, and can drive the rotating shafts 214 to rotate, so that the cable 215 can be vertically raised and lowered. The cable 215 drives the bridge block 300 to be demolished to move vertically. The control device is connected to the power unit and the lifting device respectively, and is used to control the power unit and the lifting device.

[0073] In this solution, a closed double track 130 is used to cooperate with the track wheels 213 on both sides of the vehicle body 211 to achieve stable and reliable movement. The closed double track 130 is arranged on the top of the cross frame 111 in the first frame 110 and the second frame 120;

[0074] like Figure 2 , Figure 4 The closed double track 130 includes a first track 131 and a second track 132. The first track 131 and the second track 132 are arranged on the top of the horizontal frame 111 along the length direction of the horizontal frame 111, and the first track 131 and the second track 132 are arranged parallel to each other. The first track 131 and the second track 132 are respectively connected with the track wheels 213 on both sides of the vehicle body 211;

[0075] The first track 131 and the second track 132 have the same structure, both including a horizontally arranged bottom plate 131a and vertical plates 131b vertically connected to both sides of the bottom plate 131a. The bottom plate 131a and the vertical plates 131b are connected to form a C-shaped track groove for the track wheel 213 to be placed.

[0076] The first limiting plates 131d are vertically disposed on the opposite side walls of the two vertical plates 131b, and a gap is disposed between the two first limiting plates 131a. Figure 3 The track wheel 213 is composed of an upper wheel rim 213a, a lower wheel rim 213b and a wheel rim connecting portion 213c connected between the upper wheel rim 213a and the lower wheel rim 214b. The upper wheel rim 213a and the lower wheel rim 213b and the wheel rim connecting portion 213c are connected to form an I-shaped cross section, and a slot 213d is formed between the upper wheel rim 213a and the lower wheel rim 213b.

[0077] The track wheel 213 is located in the gap between the two first limiting plates 131a. The two first limiting plates 131a are respectively located on both sides of the track wheel 213 and are respectively inserted in the clamping groove 213d between the upper wheel rim 213a and the lower wheel rim 213b. In this way, the track wheel 213 can move along the length direction of the first limiting plates 131d by rotating, and the first limiting plates 131d are clamped with the clamping grooves 213d to limit the vertical movement of the track wheel 213, so as to prevent the track wheel 213 from falling off.

[0078] The track wheel 213 and the closed double track 130 of the above structure form a double track by adopting the first track 131 and the second track 132. Through snap-fitting, the two track wheels 213 are respectively arranged on the first track 131 and the second track 132 in a laterally movable and vertically immovable manner, which can greatly improve the stability of the track trolley assembly 200 during movement.

[0079] In order to further improve the stability of the rail trolley assembly 200 during movement, the free ends of the two vertical plates 131b extend toward each other to form second limit plates 131e. The two second limit plates 131e are respectively located on both sides of the connecting part 212. The two second limit plates 131e are respectively matched with the connecting part 212 with a gap to limit the horizontal movement of the connecting part 212.

[0080] Based on the cable-supported large-span bridge efficient demolition device formed by the above scheme, this scheme also provides a construction method, and the construction steps are as follows:

[0081] S1: Determine the span of the bridge to be demolished, the length and position of each bridge block 300 to be demolished, the weight of each bridge block 300 to be demolished, the construction period, etc. according to the design drawings. According to the above factors and the calculation of the structural bearing capacity, determine the structural span, rod type, assembly form, number of each bridge block 300 to be demolished, number of rail trolley assemblies 200, wheelbase of each rail trolley assembly 200, lifting power tonnage, driving power tonnage and other parameters of the assembled support frame 100;

[0082] S2: Use a small truck crane to install the assembled support frame 100 and the closed double track 130, use a boom truck to install the track trolley assembly 200 and the cable 215, and the lifting cable 215 passes around the bottom of the bridge block 300 to be demolished and then fixes the two ends of the lifting cable 215 on the two rotating shafts 214 of the lifting trolley respectively. After the above work is completed, the bridge is cut according to the design requirements and position using a diamond wire saw according to the designed split seam position (such as Figure 1 The figure shows the design position of the separation seam and the relative position of each device);

[0083] S3: Use a truck crane to lift the two bridge blocks 300 to be dismantled from the tops of the bridge piers on the left and right sides at the abutment or roadbed, and then crush and decompose them. Figure 6 As shown in the figure, after the crushing and decomposition is completed, the crushed garbage is transported out using an excavator and a dump truck;

[0084] S4: The two rail trolley assemblies 200 located on the outside respectively lift the corresponding bridge blocks 300 to be dismantled and drive along the closed double track 130 to the abutments on both sides. During the process, the lifting device rotates the two rotating shafts 214 of the lifting trolley and simultaneously rotates to lift the segmented bridge blocks 300 to be dismantled upwards. The lifting height is ensured not to touch the abutment (generally 20 cm higher than the abutment). The construction steps are as follows: Figure 7 As shown;

[0085] S5: After the two outer rail trolley assemblies 200 reach the top of the abutment, they slowly lower the bridge block 300 to the abutment and then crush it. After the crushing is completed, the crushed garbage is transported out using an excavator and a dump truck, and the corresponding rail trolley assemblies 200 are removed at the same time. Figure 8 As shown;

[0086] S6: Repeat the above S4-S5 until the remaining bridge blocks 300 to be dismantled are dismantled, lifted away, and crushed;

[0087] S7: disconnecting the cross frame 111 of the first frame 110 from the cross frame 111 of the second frame 120, and then rotating the rotating device 140 at one end of the first frame 110 and the second frame 120 to turn the first frame 110 and the second frame 120 to the shore for dismantling and recycling.

[0088] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A cable-supported bridge demolition device using a closed track, characterized in that: It comprises two groups of assembled support frames and several track trolley assemblies, wherein the two groups of assembled support frames are relatively distributed and arranged across the bridge, the assembled support frames are provided with closed double tracks, the bottoms of the several track trolley assemblies are provided with track wheels corresponding to the closed double tracks, the axis direction of the track wheels is perpendicular to the closed double tracks, the closed double tracks are provided with track grooves, the track wheels are inserted into the track grooves along one end of the closed double tracks, a limiting structure for limiting the track wheels is provided in the track grooves, the track wheels can move along the length direction of the track grooves, and the limiting structure can limit the vertical movement of the track wheels; The bridge is divided into a number of bridge blocks to be demolished according to the span. Among the number of bridge blocks to be demolished, except for the first and last bridge blocks to be demolished with piers at the bottom, the other bridge blocks to be demolished correspond to the number of rail trolley assemblies. The rail trolley assemblies are connected to the bridge blocks to be demolished through cables. By cutting the bridge into a number of bridge blocks to be demolished, the number of rail trolley assemblies move on the rails to lift the bridge blocks to be demolished connected thereto to the nearby abutments in turn and crush them.

2. The cable-supported bridge demolition device using a closed track according to claim 1 is characterized in that: The assembled support frame includes a first frame and a second frame. The first frame and the second frame are symmetrically distributed on the left and right sides of the bridge respectively. The bottom of one end of the first frame and the second frame is respectively provided with a rotating device connected to the abutment, and the other end of the first frame and the second frame are connected in a detachable manner.

3. The cable-supported bridge demolition device using a closed track according to claim 2 is characterized in that: The first frame and the second frame have the same structure, both comprising a horizontal frame and a vertical frame. The horizontal frame is arranged horizontally, and a closed double track is arranged on the top thereof. The closed double track is provided with a track groove, and the track trolley assembly can be arranged thereon; The vertical frame is connected to one end of the horizontal frame, and a rotating device is provided at the bottom of the vertical frame. The rotating device is connected to the abutment, and the vertical frame can be rotated by the rotating device; The cross frame of the first frame body is butted against the cross frame of the second frame body at the center of the bridge span and connected via a connecting pin.

4. The cable-supported bridge demolition device using a closed track according to claim 1, characterized in that: The rail trolley assembly is composed of a first lifting trolley and a second lifting trolley with the same structure; The first lifting trolley and the second lifting trolley both include a vehicle body, both sides of which extend vertically downward to form a connecting portion, and the connecting portion is connected to the rail wheel. Two rotating shafts are provided at both ends of the bottom of the vehicle body, and cables are connected to the two rotating shafts respectively. The first lifting trolley and the second lifting trolley are movably arranged on the closed double tracks in the two sets of assembled support frames through track wheels, and the cables on the two rotating shafts in the first lifting trolley cooperate with the cables on the two rotating shafts in the second lifting trolley to be hung on the four corners of the bridge block to be demolished. The first lifting trolley and the second lifting trolley are equipped with a control device, a power device and a lifting device, and the first lifting trolley and the second lifting trolley respectively realize synchronous travel along two closed double tracks; The power device is connected to the track wheel to provide driving force for the track wheel. The lifting device is connected to the two rotating shafts respectively and can drive the rotating shafts to rotate, so that the cable can be lifted and lowered vertically. The cable drives the bridge block to be demolished to move vertically. The control device is connected to the power device and the lifting device respectively and is used to control the power device and the lifting device.

5. The cable-supported bridge demolition device using a closed track according to claim 4 is characterized in that: The closed double track includes a first track and a second track, wherein the first track and the second track are arranged on the top of the horizontal frame along the length direction of the horizontal frame, and the first track and the second track are arranged parallel to each other, and the first track and the second track are respectively connected with the track wheels on both sides of the vehicle body; The first track and the second track have the same structure, both comprising a horizontally arranged bottom plate and vertical plates vertically connected to both sides of the bottom plate, wherein the bottom plate and the vertical plates are connected to form a C-shaped track groove for the track wheel to be placed; The side walls opposite to the two vertical plates are vertically provided with first limit plates, and a gap is provided between the two first limit plates. The track wheel is composed of an upper wheel rim, a lower wheel rim, and a wheel rim connecting portion connected between the upper wheel rim and the lower wheel rim. The upper wheel rim and the lower wheel rim connecting portion form an I-shape through a connecting cross section, and a slot is formed between the upper wheel rim and the lower wheel rim. The track wheel is located in the gap between the two first limit plates, and the two first limit plates are respectively located on both sides of the track wheel and are respectively inserted in the slots between the upper wheel rim and the lower wheel rim, so that the track wheel can move along the length direction of the first limit plates by rotating, and the first limit plates are engaged with the slots to limit the vertical movement of the track wheel, thereby preventing the track wheel from falling off.

6. The cable-supported bridge demolition device using a closed track according to claim 5, characterized in that: The free ends of the two vertical plates extend toward each other to form second limit plates. The two second limit plates are respectively located on both sides of the connecting part. The two second limit plates are respectively matched with the connecting part in a clearance to limit the horizontal movement of the connecting part.

7. A construction method of a cable-supported bridge demolition device using a closed track, characterized in that: include: S1: Determine the span of the bridge to be dismantled, the length and position of each bridge block to be dismantled, the weight of each bridge block to be dismantled, the construction period, etc. according to the design drawings. According to the above factors and the calculation of the structural bearing capacity, determine the structural span, rod type, assembly form, number of bridge blocks to be dismantled, number of rail trolley assemblies, wheelbase of each rail trolley assembly, lifting power tonnage, driving power tonnage and other parameters of the assembled support frame; S2: Use a small truck crane to install the assembled support frame and the closed double track, use a boom truck to install the track trolley assembly and cables, and fix the two ends of the lifting cable on the two rotating shafts of the lifting trolley after passing through the bottom of the bridge block to be demolished. After the above work is completed, use a diamond wire saw to cut the bridge according to the designed split seam position according to the design requirements and position; S3: Use a truck crane to lift the two bridge blocks to be demolished from the top of the piers on the left and right sides at the abutment or roadbed, and then crush and decompose them. After the crushing and decomposition is completed, use an excavator and a dump truck to transport the crushed garbage out; S4: The two rail trolley assemblies located on the outside respectively lift the corresponding bridge blocks to be dismantled and drive along the closed double tracks to the abutments on both sides. During the process, the lifting device rotates the two rotating shafts of the lifting trolleys to simultaneously lift the segmented bridge blocks to be dismantled upwards, and the lifting height is ensured not to touch the abutments; S5: After the two rail trolley assemblies on the outside reach the top of the abutment, they slowly lower the bridge blocks to be dismantled to the abutment and then crush them. After the crushing is completed, the crushed garbage is transported out using an excavator and a dump truck, and the corresponding rail trolley assemblies are removed at the same time; S6: Repeat the above S4-S5 until the remaining bridge blocks to be demolished are dismantled, lifted away, and crushed; S7: disconnecting the cross frame of the first frame from the cross frame of the second frame, and then rotating the rotating devices at one end of the first frame and the second frame to turn the first frame and the second frame to the shore for dismantling and recycling.

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