Tray bearing type large-span bridge efficient dismantling device and construction method

Abstract

The invention discloses a tray bearing type large-span bridge efficient dismantling device and a construction method.The tray bearing type large-span bridge efficient dismantling device comprises two sets of assembly type supporting frames, a dismantling section lifting trolley assembly and a to-be-dismantled section lifting trolley assembly, the two sets of assembly type supporting frames are oppositely distributed and arranged across a bridge, and rails and the dismantling section lifting trolley assembly are arranged on the assembly type supporting frames; the to-be-disassembled section lifting trolley assembly is movably arranged on the rails of the two sets of assembly type supporting frames, the disassembling section lifting trolley assembly and the to-be-disassembled section lifting trolley assembly are connected with lifting ropes, the lifting ropes are connected with a tray, the bridge is divided into a plurality of to-be-disassembled bridge blocks according to the requirement, and bridge piers are arranged at the bottoms of the head to tail bridge blocks in the multiple to-be-disassembled bridge blocks. A head to-be-disassembled bridge block and a whole bridge are cut, the head to-be-disassembled bridge block is lifted away through a crane, at the moment, a disassembling section lifting trolley assembly is located above a to-be-disassembled bridge block adjacent to the head to-be-disassembled bridge block, and the to-be-disassembled section lifting trolley assembly lifts the remaining to-be-disassembled bridge through a tray.

Description

Technical Field

[0001] The invention relates to the technical field of bridge demolition, and in particular to a tray-supported large-span bridge efficient demolition device 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 when 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. In addition, the bridge erection machine can be used for such bridge demolition after modification, but the installation and disassembly costs of the bridge erection machine for bridge demolition are expensive, and the construction efficiency is low. Summary of the invention

[0004] In view of the above-mentioned technical problems in the demolition of existing bridges with limited lower space, the purpose of the present invention is to provide a pallet-supported large-span bridge efficient demolition device and construction method. This scheme can achieve efficient demolition of large-span bridges with limited lower space, eliminating the need to set up multiple lower supports in the traditional large-span bridge demolition process, and even using large bridge-building machines and other construction equipment, thereby achieving bridge demolition and saving construction costs to a certain extent.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a tray-supported large-span bridge efficient dismantling device, comprising two sets of assembled support frames, a dismantling section lifting trolley assembly, and a to-be-dismantled section lifting trolley assembly.

[0006] The two groups of assembled support frames are relatively distributed and arranged across the bridge. The assembled support frames are provided with tracks. The dismantling section lifting trolley assembly and the to-be-dismantled section lifting trolley assembly are movably arranged on the tracks of the two groups of assembled support frames. The dismantling section lifting trolley assembly and the to-be-dismantled section lifting trolley assembly are connected with a lifting rope, and the lifting rope is connected with a pallet.

[0007] The bridge is divided into a number of bridge blocks to be demolished according to the span, and the bottoms of the first and last bridge blocks to be demolished among the several bridge blocks to be demolished are provided with bridge piers, and the first bridge block to be demolished is cut from the whole bridge, and the first bridge block to be demolished is lifted away by a crane and then crushed and decomposed, at which time the demolition section lifting trolley assembly is located above the bridge blocks to be demolished adjacent to the first bridge block to be demolished, and the demolition section lifting trolley assembly lifts the remaining bridge blocks to be demolished through a pallet to ensure the stability of the uncut and separated bridges to be demolished;

[0008] The demolition section lifting trolley assembly lifts the bridge block to be demolished below it through the pallet, and cuts the bridge block to be demolished from the entire bridge. The demolition section lifting trolley assembly transports the bridge block to the abutment and breaks it up.

[0009] The demolition section lifting trolley assembly cooperates with the to-be-demolished section lifting trolley assembly. By moving on the track, the demolition section lifting trolley assembly sequentially moves all the to-be-demolished bridge blocks except the rear bridge block to be demolished and the to-be-demolished bridge blocks adjacent to the rear bridge block to be demolished to the abutment and breaks them up.

[0010] The lifting trolley assembly for the section to be demolished moves on the track and supports the remaining bridge blocks to be demolished until the lifting trolley assembly for the section to be demolished finally lifts the bridge block to be demolished adjacent to the rear bridge block to be demolished and cuts the bridge block to be demolished from the rear bridge block to be demolished. The lifting trolley assembly for the section to be demolished moves the lifted bridge block to the abutment and crushes it, and finally the rear bridge block to be demolished is lifted away by a crane and crushed, thereby completing the demolition of the entire bridge.

[0011] 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.

[0012] 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 horizontally arranged, and a track is provided on the top thereof, on which the track trolley assembly can be arranged;

[0013] 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;

[0014] 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.

[0015] Furthermore, the dismantling section lifting trolley assembly and the to-be-dismantled section lifting trolley assembly have the same structure, and are both composed of a first lifting trolley and a second lifting trolley with the same structure;

[0016] The first lifting trolley and the second lifting trolley are provided with a front axle and a rear axle at both ends of the bottom, respectively, and rail wheels are connected to both ends of the front axle and the rear axle. The first lifting trolley and the second lifting trolley are movably arranged on the rails in the two sets of assembled support frames through the rail wheels.

[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 tracks;

[0018] The front axle and the rear axle are respectively connected with lifting ropes, and the lifting ropes on the front axle and the rear axle of the first lifting trolley and the lifting ropes on the front axle and the rear axle of the second lifting trolley are respectively connected to the four corners of the pallet;

[0019] The power unit is connected to the track wheel to provide driving force for the track wheel. The lifting device is connected to the front axle and the rear axle respectively, and can drive the front axle and the rear axle to rotate, so that the lifting rope can be lifted vertically. The tray is used to support the bottom of the bridge block to be demolished, and the lifting rope is used to connect to the bridge block to be demolished. 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.

[0020] Furthermore, the tray is composed of overlapping polytetrafluoroethylene plates and steel plates, and four corners of the top of the polytetrafluoroethylene plates are respectively provided with connecting parts for connecting with the suspension ropes.

[0021] In order to achieve the above object, the present invention provides a construction method of a tray-supported large-span bridge efficient demolition device, which is used for any one of the above items, and the construction method comprises:

[0022] 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. Consider the above factors comprehensively and calculate the structural bearing capacity to determine the structural span, rod type, assembly form, number of bridge blocks to be dismantled, pallet size, wheelbase of each first lifting trolley and second lifting trolley, lifting power tonnage, driving power tonnage and other parameters of the assembled support frame;

[0023] S2: Use a small truck crane to install the assembled support frame and the track, use a boom truck to install the track removal section lifting trolley assembly, the section to be removed lifting trolley assembly and the lifting rope, the lifting rope is passed around and fixed on the front and rear axles of the lifting trolley respectively, the removal section lifting trolley assembly is moved to the top of the bridge block to be removed adjacent to the bridge block to be removed at the head, and the section to be removed lifting trolley assembly is installed with a tray to support the remaining bridge to be removed;

[0024] S3: Use a diamond wire saw to cut the first bridge block to be demolished and the whole bridge according to the design requirements and positions, use a truck crane to place the bridge block to be demolished at the abutment or roadbed, and crush and decompose the first bridge block to be demolished. After the crushing and decomposition is completed, use an excavator and a dump truck to transport the crushed garbage out, use a truck crane and a boom truck for manual assistance, connect the pallet to the demolition section lifting trolley assembly, and move the demolition section lifting trolley assembly to make the pallet reach the bottom of the bridge block to be demolished adjacent to the first bridge block to be demolished;

[0025] S4: Separate the adjacent bridge blocks to be dismantled from the beam sections to be dismantled by using a diamond wire saw, and lift the bridge blocks to be dismantled by the dismantling section lifting trolley assembly. When the dismantling section lifting trolley assembly moves along the track toward the abutment, the lifting device in the dismantling section lifting trolley assembly drives the front and rear axles to rotate simultaneously to lift the split beam upwards, and the lifting height is ensured not to touch the abutment.

[0026] S5: After the lifting trolley assembly of the demolition section reaches the top of the abutment, the bridge blocks to be demolished are slowly lowered to the abutment and then crushed. After the crushing is completed, the crushed garbage is transported out using an excavator and a dump truck;

[0027] S6: The demolition section lifting trolley assembly returns along the track, and the lifting rope is lowered at the same time. The tray of the demolition section lifting trolley assembly slides along the adjacent bridge block to be demolished of the bridge block to be demolished just demolished and is suspended. At the same time, the demolition section lifting trolley assembly also slides along the bridge block to be demolished;

[0028] S7: The bridge block to be demolished held by the demolition section lifting trolley assembly is separated from the bridge block to be demolished by using a diamond wire saw, and the demolition section lifting trolley assembly lifts the bridge block to the abutment and breaks it into pieces;

[0029] S8: According to the steps of S6-S7, the remaining bridge blocks to be demolished are dismantled, lifted and crushed and decomposed in a loop until the lifting trolley assembly of the demolishing section moves all the bridge blocks to be demolished except the rear bridge block to be demolished and the bridge blocks to be demolished adjacent to the rear bridge block to be demolished to the abutment and crush and decompose them, the lifting trolley assembly of the section to be demolished lifts the bridge block to be demolished adjacent to the rear bridge block to be demolished and cuts and separates the bridge block to be demolished from the rear bridge block to be demolished, and the lifting trolley assembly of the section to be demolished moves the bridge block to be demolished it lifts to the abutment and crushes and decomposes it;

[0030] S9: Finally, a car crane is used at the abutment to lift the bridge block to be demolished at the rear and crush it. After the crushing is completed, an excavator and a dump truck are used to transport the broken garbage out. At this time, the overall demolition of the bridge is completed;

[0031] S10: 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 present invention provides a pallet-supported large-span bridge efficient dismantling device and construction method. This solution can achieve efficient dismantling of large-span bridges with limited lower space, eliminating the need to set up multiple lower supports or even use large-scale bridge-building machines and other construction equipment in the traditional large-span bridge dismantling process, thereby achieving bridge dismantling and saving construction costs to a certain extent.

[0033] Compared with the prior art, the cable-supported large-span bridge efficient demolition device and construction method provided by the present invention have the following beneficial effects:

[0034] (1) The construction equipment and method 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 achieving bridge demolition and saving construction costs to a certain extent;

[0035] (2) The construction equipment and construction method can ensure the safety and environmental protection of the entire demolition process. The main decomposition process is carried out on the shore abutment or roadbed, which can achieve accurate separation of demolition waste and realize the recycling and reuse of demolition waste;

[0036] (3) The bridge demolition device only needs two lifting trolleys and a load tray. The load tray has a two-layer structure, with the top surface layer being a polytetrafluoroethylene plate and the bottom being made of steel. The tray can reduce the sliding friction at the bottom of the beam while providing sufficient load-bearing capacity for the beam section to be demolished. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0038] Figure 1 A schematic diagram of the actual application of the tray-supported large-span bridge efficient demolition device provided by the present invention;

[0039] Figure 2 A side view of a tray-supported large-span bridge efficient dismantling device provided by the present invention;

[0040] Figure 3 A side view of a demolition section lifting trolley assembly in a pallet-supported large-span bridge efficient demolition device provided by the present invention;

[0041] Figure 4 A schematic diagram of the structure of a pallet in the pallet-supported large-span bridge efficient dismantling device provided by the present invention;

[0042] Figure 5 A schematic diagram of step 3 in the construction method of the tray-supported large-span bridge efficient dismantling device provided by the present invention;

[0043] Figure 6 A schematic diagram of step 4 in the construction method of the tray-supported large-span bridge efficient dismantling device provided by the present invention;

[0044] Figure 7 A schematic diagram of step 5 in the construction method of the tray-supported large-span bridge efficient dismantling device provided by the present invention;

[0045] Figure 8 A schematic diagram of step 6 in the construction method of the tray-supported large-span bridge efficient dismantling device provided by the present invention;

[0046] Fig. 9 A schematic diagram of step 7 in the construction method of the tray-supported large-span bridge efficient dismantling device provided by the present invention;

[0047] Illustration Description:

[0048] Assembled support frame 100, demolished section lifting trolley assembly 200, to-be-removed section lifting trolley assembly 300, to-be-removed bridge block 400;

[0049] The first frame 110, the horizontal frame 111, the vertical frame 112, the second frame 120, the track 130, the rotating device 140, the first lifting trolley 210, the front axle 211, the rear axle 212, the track wheel 213, the lifting rope 217, the pallet 218, the polytetrafluoroethylene plate 218a, the steel plate 218b, the connecting part 218c, the second lifting trolley 220, the first bridge block to be demolished 410, the second bridge block to be demolished 420, the third bridge block to be demolished 430, the fourth bridge block to be demolished 440, the fifth bridge block to be demolished 450, and the sixth bridge block to be demolished 460. DETAILED DESCRIPTION

[0050] 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 explained below with reference to specific diagrams.

[0051] The tray-supported large-span bridge efficient dismantling device provided by the present invention is installed across the bridge, and can dismantle the bridge without providing support at the bottom of the bridge, and can be well applied to the dismantling of bridges with limited lower space.

[0052] See also Figure 1-Figure 2 , which is a schematic structural diagram of the tray-supported large-span bridge efficient dismantling device provided by the present invention.

[0053] As can be seen from the diagram, the tray-supported large-span bridge efficient dismantling device provided by the present invention includes three components: two sets of assembled support frames 100, a dismantling section lifting trolley assembly 200, and a to-be-dismantled section lifting trolley assembly 300.

[0054] The two groups of assembled support frames 100 are relatively distributed and arranged across the bridge, and the assembled support frames 100 are provided with tracks 130;

[0055] The dismantling section lifting trolley assembly 200 and the to-be-dismantled section lifting trolley assembly 300 are movably arranged on the tracks 130 of the two sets of assembled support frames 100, and the dismantling section lifting trolley assembly 200 and the to-be-dismantled section lifting trolley assembly 300 are connected with a lifting rope 217, and the lifting rope 217 is connected with a tray 218.

[0056] The bridge is divided into a number of bridge blocks 400 to be demolished according to the span. The first and last bridge blocks 400 to be demolished among the several bridge blocks 400 to be demolished are provided with bridge piers at the bottom. The first bridge block 400 to be demolished is cut from the whole bridge, and the first bridge block 400 to be demolished is lifted and broken by a crane. At this time, the demolition section lifting trolley assembly 200 is located above the bridge block 400 to be demolished adjacent to the first bridge block 400 to be demolished, and the demolition section lifting trolley assembly 300 lifts the remaining bridge to be demolished through the pallet 218 to ensure the stability of the uncut and separated bridge to be demolished;

[0057] The demolition section lifting trolley assembly 200 lifts the bridge block 400 to be demolished below it through the pallet 218, and cuts the bridge block 400 to be demolished from the entire bridge. The demolition section lifting trolley assembly 200 transports the bridge block 400 to the abutment and breaks it up.

[0058] The demolition section lifting trolley assembly 200 cooperates with the to-be-dismantled section lifting trolley assembly 300, and by moving on the track 130, the demolition section lifting trolley assembly 200 sequentially moves all the to-be-dismantled bridge blocks 400 except the rear to-be-dismantled bridge block 400 and the to-be-dismantled bridge blocks 400 adjacent to the rear to-be-dismantled bridge block 400 to the abutment and breaks them up.

[0059] The lifting trolley assembly 300 of the section to be demolished moves on the track 130 and supports the remaining bridge block 400 to be demolished until the lifting trolley assembly 300 of the section to be demolished lifts the bridge block 400 to be demolished adjacent to the rear bridge block 400 to be demolished, and the lifting trolley assembly 300 of the section to be demolished cuts and separates the bridge block 400 to be demolished from the rear bridge block 400 to be demolished and moves it to the abutment and breaks it into pieces, and finally the rear bridge block 400 to be demolished is lifted away by a crane and broken into pieces, thereby completing the demolition of the entire bridge.

[0060] 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.

[0061] After the bridge is dismantled, the connection between the first frame 110 and the second frame 120 can be disconnected, and then the first frame 110 and the second frame 120 are rotated by the rotating device 140 at the bottom, so that the first frame 110 and the second frame 120 are respectively turned to the abutments on both sides for dismantling and recycling of the frames.

[0062] Compared with the existing technology, this solution can achieve efficient demolition of large-span bridges with limited lower space, eliminating the need to set up multiple lower supports or even use large bridge-building machines and other construction equipment in the traditional large-span bridge demolition process. This can achieve bridge demolition while saving construction costs to a certain extent.

[0063] Specifically, Figure 1 , Figure 2 The first frame 110 and the second frame 120 have the same structure, both of which include a horizontal frame 111 and a vertical frame 112. The horizontal frame 111 is horizontally arranged, and a track 130 is provided on the top thereof, on which a lifting trolley assembly 200 of a section to be removed can be provided, and a lifting trolley assembly 300 of a section to be removed is provided;

[0064] 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.

[0065] 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.

[0066] Furthermore, if Figure 1As shown, in this example, a large span bridge to be demolished is divided into six bridge blocks 400 to be demolished for cutting and separation, namely a first bridge block 410 to be demolished, a second bridge block 420 to be demolished, a third bridge block 430 to be demolished, a fourth bridge block 440 to be demolished, a fifth bridge block 450 to be demolished, and a sixth bridge block 460 to be demolished;

[0067] The first bridge block 410 to be demolished and the sixth bridge block 460 to be demolished are provided with bridge piers at the bottom;

[0068] 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 demolition section lifting trolley assembly 200 is the length of the segmented block that the trolley needs to lift minus 1m. Taking the wheelbase of the second bridge block 420 to be demolished as an example, the wheelbase of the first rail trolley assembly 201 should be adjusted to: L2 car=L2-1.

[0069] 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 dismantling section lifting trolley assembly 200, the lifting trolley assembly 300 of the section to be dismantled and the lifting rope 217 are installed, and the dismantling section lifting trolley assembly 200 only installs the lifting rope 217 and does not install the pallet 218 for the time being; the four corners of the pallet 218 of the lifting trolley assembly 300 of the section to be dismantled are respectively fixed to the front and rear axles of the lifting trolley assembly 300 of the section to be dismantled through the two ends of the lifting rope 217, and the distance between the position of the lifting trolley assembly 300 of the section to be dismantled and the lifting rope 217 is controlled to be 0.5m from the position of the separation joint to ensure construction safety.

[0070] In actual application of this example, the demolition section lifting trolley assembly 200 is located above the second bridge block 420 to be demolished, and the demolition section lifting trolley assembly 300 hoists the third bridge block 430 to be demolished through a pallet, and then the first bridge block 410 to be demolished on the top of the left pier is cut off from the entire bridge, and the first bridge block 410 to be demolished is lifted away by a crane and then crushed and decomposed;

[0071] The third bridge block 430 to be dismantled is hoisted by the to-be-dismantled section lifting trolley assembly 300, so that the remaining bridge is stable. At this time, the dismantling section lifting trolley assembly 200 lifts the second bridge block 420 to be dismantled below it to the abutment through the pallet 218 and breaks it into pieces;

[0072] Then, the demolition section lifting trolley assembly 200 and the to-be-dismantled section lifting trolley assembly 300 move toward the sixth to-be-dismantled bridge block 460, the demolition section lifting trolley assembly 200 hangs the third to-be-dismantled bridge block 430, and the to-be-dismantled section lifting trolley assembly 300 hangs the fourth to-be-dismantled bridge block 440;

[0073] The third bridge block 430 to be dismantled is cut off from the entire bridge, and the dismantling section lifting trolley assembly 200 lifts the third bridge block 430 to be dismantled to the abutment and breaks it up. Similarly, the dismantling section lifting trolley assembly 200 lifts the fourth bridge block 440 to be dismantled to the abutment and breaks it up.

[0074] Finally, the lifting trolley assembly 300 of the section to be demolished lifts the fifth bridge block 450 to be demolished, cuts and separates the fifth bridge block 350 from the sixth bridge block 460 to be demolished, and the lifting trolley assembly 300 of the section to be demolished lifts the fifth bridge block 450 to the abutment for crushing and decomposing it. Finally, the sixth bridge block 460 to be demolished with piers at the bottom is lifted and crushed and decomposed by a crane, thereby completing the overall demolition of the bridge.

[0075] Specifically, Figure 2 , Figure 3 In this solution, the dismantling section lifting trolley assembly 200 and the to-be-dismantled section lifting trolley assembly 300 have the same structure, and are both composed of a first lifting trolley 210 and a second lifting trolley 220 of the same structure;

[0076] The first lifting trolley 210 and the second lifting trolley 220 are provided with a front axle 211 and a rear axle 212 at both ends of the bottom, and rail wheels 213 are connected to both ends of the front axle 211 and the rear axle 212. The first lifting trolley 210 and the second lifting trolley 220 are movably arranged on the rails 130 in the two sets of assembled support frames 100 through the rail wheels 213.

[0077] 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 the two tracks 130;

[0078] The front axle 211 and the rear axle 212 are respectively connected with a lifting rope 217, and the lifting rope 217 on the front axle 211 and the rear axle 212 in the first lifting trolley 210 and the lifting rope 217 on the front axle 211 and the rear axle 212 in the second lifting trolley 220 are respectively connected to the four corners of the tray 218;

[0079] 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 front axle 211 and the rear axle 212 respectively, and can drive the front axle 211 and the rear axle 212 to rotate, so that the lifting rope 217 can be lifted vertically. The tray 218 is used to support the bottom of the bridge block 400 to be demolished. 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.

[0080] The above-mentioned suspension rope 217 is preferably a steel wire rope in this solution;

[0081] like Figure 4 The pallet 218 is composed of overlapping polytetrafluoroethylene plates 218a and steel plates 218b. The four corners of the top of the polytetrafluoroethylene plates 218a are respectively provided with connecting parts 218c for connecting with the suspension rope 217. The pallet 218 with such a structure can reduce the sliding friction at the bottom of the beam while providing sufficient bearing capacity for the beam section to be dismantled.

[0082] Based on the tray-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:

[0083] S1: Determine the span of the bridge to be demolished, the length and position of each bridge block 400 to be demolished, the weight of each bridge block 400 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 400 to be demolished, size of the pallet 218, wheelbase of each first lifting trolley 210 and second lifting trolley 220, lifting power tonnage, driving power tonnage and other parameters of the assembled support frame 100;

[0084] S2: Use a small truck crane to install the assembled support frame 100 and the track 130, use a boom truck to install the track removal section lifting trolley assembly 200, the section to be removed lifting trolley assembly 300 and the lifting rope 217, the lifting rope 217 is passed around and fixed on the front and rear axles of the lifting trolley respectively, the removal section lifting trolley assembly 200 is moved to the top of the bridge block 400 adjacent to the bridge block 400 to be removed at the head, and the section to be removed lifting trolley assembly 300 is installed with a tray 218 to support the remaining bridge to be removed, such as Figure 1 ;

[0085] S3: According to the design requirements and positions, the diamond wire saw is used to cut the first bridge block 400 to be demolished and the bridge as a whole, and the bridge block 400 to be demolished is crushed and decomposed at the abutment or roadbed position by a truck crane. After the crushing and decomposition is completed, the crushed garbage is transported out by an excavator and a dump truck, and the truck crane and the boom truck are used for manual assistance to connect the pallet 218 to the demolition section lifting trolley assembly 200, and the demolition section lifting trolley assembly 200 is moved so that the pallet 218 reaches the bottom of the bridge block 400 to be demolished adjacent to the first bridge block 400 to be demolished, such as Figure 5 shown.

[0086] S4: The bridge blocks 400 to be demolished adjacent to the first bridge block 400 to be demolished are separated from the beam sections to be demolished by using a diamond wire saw, and the demolished section lifting trolley assembly 200 lifts the bridge block 400 to be demolished. When the demolished section lifting trolley assembly 200 moves along the track 130 toward the abutment position, the lifting device 214 in the demolished section lifting trolley assembly 200 drives the front axle 211 and the rear axle 212 to rotate simultaneously to lift the segmented beam upwards, and the lifting height is ensured not to touch the abutment (generally 20 cm higher than the abutment). The construction steps are as follows: Figure 6 As shown;

[0087] S5: After the demolition section lifting trolley assembly 200 reaches the top of the abutment, the bridge block 400 to be demolished is slowly lowered to the abutment and then crushed. After the crushing is completed, an excavator and a dump truck are used to transport the crushed garbage out. Figure 7 As shown;

[0088] S6: The dismantling section lifting trolley assembly 200 returns along the track 130, and the lifting rope 217 is lowered. Figure 5 As shown, the tray 218 of the demolition section lifting trolley assembly 200 slides along and hangs the adjacent bridge block 400 to be demolished of the just-dismantled bridge block 400, and at the same time, the demolition section lifting trolley assembly 300 also slides along the bridge block 400 to be demolished, as shown in FIG. Figure 8 shown.

[0089] S7: The bridge block 400 to be demolished held by the demolition section lifting trolley assembly 200 is separated from the bridge to be demolished by using a diamond wire saw, and the demolition section lifting trolley assembly 200 lifts the bridge block 400 to the abutment and breaks it into pieces. Fig. 9 ;

[0090] S8: According to the steps of S6-S7, the remaining bridge blocks 400 to be demolished are dismantled, lifted and crushed in a loop until the demolition section lifting trolley assembly 200 moves all the bridge blocks 400 to be demolished except the rear bridge block 400 to be demolished and the bridge blocks 400 to be demolished adjacent to the rear bridge block 400 to be demolished to the abutment and crushes and decomposes them, the section to be demolished lifting trolley assembly 300 lifts the bridge block 400 to be demolished adjacent to the rear bridge block 400 to be demolished and cuts and separates the bridge block 400 to be demolished from the rear bridge block 400 to be demolished, and the section to be demolished lifting trolley assembly 300 moves the bridge block 400 to be demolished that it lifts to the abutment and crushes and decomposes it;

[0091] S9: Finally, a car crane is used at the abutment position to lift and crush the bridge block 400 to be demolished at the rear, and after crushing, an excavator and a dump truck are used to transport the crushed garbage out, and the overall demolition of the bridge is completed at this time;

[0092] S10: 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.

[0093] 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 tray-supported long-span bridge efficient demolition device, characterized in that: It includes two sets of assembled support frames, a lifting trolley assembly for the dismantled section, and a lifting trolley assembly for the section to be dismantled. The two groups of assembled support frames are relatively distributed and arranged across the bridge. The assembled support frames are provided with tracks. The dismantling section lifting trolley assembly and the to-be-dismantled section lifting trolley assembly are movably arranged on the tracks of the two groups of assembled support frames. The dismantling section lifting trolley assembly and the to-be-dismantled section lifting trolley assembly are connected with a lifting rope, and the lifting rope is connected with a pallet. The bridge is divided into a number of bridge blocks to be demolished according to the span, and the bottoms of the first and last bridge blocks to be demolished among the several bridge blocks to be demolished are provided with bridge piers, and the first bridge block to be demolished is cut from the whole bridge, and the first bridge block to be demolished is lifted away by a crane and then crushed and decomposed, at which time the demolition section lifting trolley assembly is located above the bridge blocks to be demolished adjacent to the first bridge block to be demolished, and the demolition section lifting trolley assembly lifts the remaining bridge blocks to be demolished through a pallet to ensure the stability of the uncut and separated bridges to be demolished; The demolition section lifting trolley assembly lifts the bridge block to be demolished below it through the pallet, and cuts the bridge block to be demolished from the entire bridge. The demolition section lifting trolley assembly transports the bridge block to the abutment and breaks it up. The demolition section lifting trolley assembly cooperates with the to-be-demolished section lifting trolley assembly. By moving on the track, the demolition section lifting trolley assembly sequentially moves all the to-be-demolished bridge blocks except the rear bridge block to be demolished and the to-be-demolished bridge blocks adjacent to the rear bridge block to be demolished to the abutment and breaks them up. The lifting trolley assembly for the section to be demolished moves on the track and supports the remaining bridge blocks to be demolished until the lifting trolley assembly for the section to be demolished lifts the bridge block to be demolished adjacent to the rear bridge block to be demolished and cuts the bridge block to be demolished from the rear bridge block to be demolished. The lifting trolley assembly for the section to be demolished moves the lifted bridge block to the abutment and crushes it, and finally the rear bridge block to be demolished is lifted away by a crane and crushed, thereby completing the demolition of the entire bridge.

2. The tray-supported long-span bridge efficient demolition device 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 tray-supported long-span bridge efficient demolition device 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 track is arranged on the top thereof, on which the track trolley assembly can be arranged; 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 tray-supported large-span bridge efficient demolition device according to claim 1 is characterized in that: The dismantling section lifting trolley assembly and the to-be-dismantled section lifting trolley assembly have the same structure, and are both composed of a first lifting trolley and a second lifting trolley of the same structure; The first lifting trolley and the second lifting trolley are provided with a front axle and a rear axle at both ends of the bottom, respectively, and rail wheels are connected to both ends of the front axle and the rear axle. The first lifting trolley and the second lifting trolley are movably arranged on the rails in the two sets of assembled support frames through the rail wheels. 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 tracks; The front axle and the rear axle are respectively connected with lifting ropes, and the lifting ropes on the front axle and the rear axle of the first lifting trolley and the lifting ropes on the front axle and the rear axle of the second lifting trolley are respectively connected to the four corners of the pallet; The power unit is connected to the track wheel to provide driving force for the track wheel. The lifting device is connected to the front axle and the rear axle respectively, and can drive the front axle and the rear axle to rotate, so that the lifting rope can be lifted vertically. The tray is used to support the bottom of the bridge block to be demolished, and the lifting rope is used to connect to the bridge block to be demolished. 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.

5. The tray-supported long-span bridge efficient demolition device according to claim 3 is characterized in that: The tray is composed of overlapping polytetrafluoroethylene plates and steel plates. The four corners of the top of the polytetrafluoroethylene plates are respectively provided with connecting parts for connecting with the suspension ropes.

6. A construction method for a tray-supported large-span bridge efficient demolition device, characterized in that: include: S1: Determine the span of the bridge to be demolished, the length and position of each bridge block to be demolished, the weight of each bridge block to be demolished, the construction period, etc. according to the design drawings. Consider the above factors comprehensively and calculate the structural bearing capacity to determine the structural span, rod type, assembly form, number of bridge blocks to be demolished, pallet size, wheelbase of each first lifting trolley and second lifting trolley, 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 track, use a boom truck to install the track removal section lifting trolley assembly, the section to be removed lifting trolley assembly and the lifting rope, the lifting rope is passed around and fixed on the front and rear axles of the lifting trolley respectively, the removal section lifting trolley assembly is moved to the top of the bridge block to be removed adjacent to the bridge block to be removed at the head, and the section to be removed lifting trolley assembly is installed with a tray to support the remaining bridge to be removed; S3: Use a diamond wire saw to cut the first bridge block to be demolished and the whole bridge according to the design requirements and positions, use a truck crane to place the bridge block to be demolished at the abutment or roadbed, and crush and decompose the first bridge block to be demolished. After the crushing and decomposition is completed, use an excavator and a dump truck to transport the crushed garbage out, use a truck crane and a boom truck for manual assistance, connect the pallet to the demolition section lifting trolley assembly, and move the demolition section lifting trolley assembly to make the pallet reach the bottom of the bridge block to be demolished adjacent to the first bridge block to be demolished; S4: Separate the adjacent bridge blocks to be dismantled from the beam sections to be dismantled by using a diamond wire saw, and lift the bridge blocks to be dismantled by the dismantling section lifting trolley assembly. When the dismantling section lifting trolley assembly moves along the track toward the abutment, the lifting device in the dismantling section lifting trolley assembly drives the front and rear axles to rotate simultaneously to lift the split beam upwards, and the lifting height is ensured not to touch the abutment. S5: After the demolition section lifting trolley assembly reaches the top of the abutment, the bridge blocks to be demolished are slowly lowered to the abutment and then crushed. After the crushing is completed, the crushed garbage is transported out using an excavator and a dump truck; S6: The demolition section lifting trolley assembly returns along the track, and the lifting rope is lowered at the same time. The tray of the demolition section lifting trolley assembly slides along the adjacent bridge block to be demolished of the bridge block to be demolished just demolished and is suspended. At the same time, the demolition section lifting trolley assembly also slides along the bridge block to be demolished; S7: The bridge block to be demolished held by the demolition section lifting trolley assembly is separated from the bridge block to be demolished by using a diamond wire saw, and the demolition section lifting trolley assembly lifts the bridge block to the abutment and breaks it into pieces; S8: According to the steps of S6-S7, the remaining bridge blocks to be demolished are dismantled, lifted and crushed and decomposed in a loop until the lifting trolley assembly of the demolishing section moves all the bridge blocks to be demolished except the rear bridge block to be demolished and the bridge blocks to be demolished adjacent to the rear bridge block to be demolished to the abutment and crush and decompose them, the lifting trolley assembly of the section to be demolished lifts the bridge block to be demolished adjacent to the rear bridge block to be demolished and cuts and separates the bridge block to be demolished from the rear bridge block to be demolished, and the lifting trolley assembly of the section to be demolished moves the bridge block to be demolished it lifts to the abutment and crushes and decomposes it; S9: Finally, a car crane is used at the abutment to lift the bridge block to be demolished at the rear and crush it. After the crushing is completed, an excavator and a dump truck are used to transport the broken garbage out. At this time, the overall demolition of the bridge is completed; S10: 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.

Images