Tray bearing type bridge demolition device adopting closed track and construction method

Abstract

The invention discloses a tray bearing type bridge demolition device adopting closed rails and a construction method.The tray bearing type bridge demolition device comprises two sets of assembly type supporting frames, a demolition section lifting trolley assembly and a to-be-demolition section lifting trolley assembly, 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 and cables are arranged at the bottom of the dismantling section lifting trolley assembly and the bottom of the to-be-dismantled section lifting trolley assembly, the cables are connected with trays, the axis direction of the rail wheels is perpendicular to the closed double rails, rail grooves are formed in the closed double rails, and the cables are connected with the trays. The rail wheels are inserted into the rail grooves along one ends of the closed double rails, 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, the vertical movement of the rail wheels can be limited through the limiting structures, the stability is high when the lifting trolley moves in the dismantling process, and the reliability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge demolition, and in particular to a pallet-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 existing bridges with limited lower space, the purpose of the present invention is to provide a tray-bearing bridge demolition device and construction method using a closed track. This solution can realize the 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 erection machines and other construction equipment, 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 lifting 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 object, the present invention provides a pallet-supported bridge dismantling device using a closed track, comprising two sets of assembled support frames, a dismantling section lifting trolley assembly, and a to-be-dismantled section lifting trolley assembly.

[0008] 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 demolished section lifting trolley assembly, the bottom of the to-be-disassembled section lifting trolley assembly is provided with track wheels corresponding to the closed double tracks and cables, the cables are connected with trays, 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;

[0009] 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;

[0010] 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 demolition section lifting trolley assembly to the abutment and breaks it up.

[0011] The demolition section lifting trolley assembly cooperates with the to-be-demolished section lifting trolley assembly, and moves on the closed double track. The demolition section lifting trolley assembly sequentially lifts all the to-be-demolished bridge blocks except the rear bridge block to be demolished and the adjacent bridge blocks to be demolished to the abutment and breaks them up.

[0012] The lifting trolley assembly for the section to be demolished moves on the closed double 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.

[0013] 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.

[0014] 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 thereof, and a track groove is arranged in the closed double track for the removal of the section lifting trolley assembly, and the section to be removed lifting trolley assembly is arranged thereon;

[0015] 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;

[0016] 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.

[0017] 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;

[0018] 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.

[0019] Two rotating shafts are provided at both ends of the bottom of the vehicle body, and cables are respectively connected to the two rotating shafts, 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 respectively connected to the four corners of the pallet;

[0020] 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;

[0021] 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 tray is used to support the bottom of the bridge block to be demolished. 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.

[0022] 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 cables.

[0023] 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;

[0024] 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;

[0025] 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.

[0026] 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.

[0027] 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.

[0028] In order to achieve the above object, the present invention provides a construction method of a tray-supported bridge demolition device using a closed track, which is used for any one of the above items, and the construction method comprises:

[0029] 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;

[0030] 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 removal section lifting trolley assembly, the section to be removed lifting trolley assembly and the cable, the cable is passed around and fixed on the two rotating shafts of the lifting trolley, 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;

[0031] 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;

[0032] S4: Separate the adjacent bridge blocks to be demolished from the beam sections to be demolished by using a diamond wire saw, and lift the bridge blocks to be demolished by the demolishing section lifting trolley assembly. When the demolishing section lifting trolley assembly is moving along the closed double track toward the abutment position, the lifting device in the demolishing section lifting trolley assembly drives two rotating shafts to rotate simultaneously to lift the split beam upwards, and the lifting height is ensured not to touch the abutment;

[0033] 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;

[0034] S6: The demolition section lifting trolley assembly returns along the closed double track, and the cable 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;

[0035] 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;

[0036] 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;

[0037] 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;

[0038] 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.

[0039] The present invention provides a tray-supported bridge demolition device and construction method using a closed track. This solution 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.

[0040] 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

[0041] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0042] Figure 1 A front view schematic diagram of the structure of a tray-supported bridge demolition device using a closed track provided by the present invention;

[0043] Figure 2 A schematic side structural view of a tray-supported bridge demolition device using a closed track provided by the present invention;

[0044] Figure 3 A schematic diagram of the structure of a pallet in a pallet-supported bridge demolition device using a closed track provided by the present invention;

[0045] Figure 4 A schematic structural diagram of a first lifting trolley in a pallet-supported bridge demolition device using a closed track provided by the present invention;

[0046] Figure 5 A schematic structural diagram of the first track in the tray-supported bridge demolition device using a closed track provided by the present invention;

[0047] Figure 6 A schematic diagram of the first lifting trolley in the tray-supported bridge demolition device using a closed track provided by the present invention being connected in coordination with the closed double track;

[0048] Figure 7 A schematic diagram of step 3 in the construction method of the tray-supported bridge demolition device using a closed track provided by the present invention;

[0049] Figure 8 A schematic diagram of step 4 in the construction method of the tray-supported bridge demolition device using a closed track provided by the present invention;

[0050] Fig. 9 A schematic diagram of step 5 in the construction method of the tray-supported bridge demolition device using a closed track provided by the present invention;

[0051] Fig.10 A schematic diagram of step 6 in the construction method of the tray-supported bridge demolition device using a closed track provided by the present invention;

[0052] Fig.11 A schematic diagram of step 7 in the construction method of the pallet-supported bridge demolition device using a closed track provided by the present invention.

[0053] Illustration Description:

[0054] Assembled support frame 100, demolished section lifting trolley assembly 200, to-be-removed section lifting trolley assembly 300, to-be-removed bridge block 400;

[0055] 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 vehicle body 211, the connecting part 212, the track wheel 213, the upper wheel rim 213a, the lower wheel rim 213b, the wheel rim connecting part 213c, the slot 213d, the rotating shaft 214, the cable 215, the tray 216, the polytetrafluoroethylene plate 216a, the steel plate 216b, the connecting part 216c, the second lifting trolley 220, the second lifting trolley 220, the first bridge block 410 to be demolished, the second bridge block 420 to be demolished, the third bridge block 430 to be demolished, the fourth bridge block 440 to be demolished, the fifth bridge block 450 to be demolished, and the sixth bridge block 460 to be demolished. DETAILED DESCRIPTION

[0056] 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.

[0057] See also Figure 1-Figure 6 , which is a schematic structural diagram of a pallet-supported bridge demolition device using a closed track provided by the present invention.

[0058] As can be seen from the diagram, the pallet-supported bridge dismantling device using a closed track 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.

[0059] 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;

[0060] The dismantling section lifting trolley assembly 200 and the to-be-dismantled section lifting trolley assembly 300 are provided with a track wheel 213 corresponding to the closed double track 130 and a cable 215 at the bottom, the cable 215 is connected with a tray 216, the axis direction of the track wheel 213 is perpendicular to the closed double track 130, the closed double track 130 is provided with a track groove, the track wheel 213 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, 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;

[0061] 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 away by a crane and then broken and decomposed. 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 216 to ensure the stability of the uncut and separated bridge to be demolished;

[0062] The demolition section lifting trolley assembly 200 lifts the bridge block 400 to be demolished below it through the pallet 216, 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.

[0063] The demolition section lifting trolley assembly 200 cooperates with the to-be-demolished section lifting trolley assembly 300, and by moving on the closed double track 130, the demolition section lifting trolley assembly 200 sequentially lifts all the to-be-demolished bridge blocks 400 except the rear to-be-demolished bridge block 400 and the to-be-demolished bridge blocks 400 adjacent to the rear to-be-demolished bridge block 400 to the abutment and crushes and decomposes them.

[0064] The lifting trolley assembly 300 of the section to be demolished moves on the closed double track 130 and supports the remaining bridge to be demolished until the lifting trolley assembly 300 of the section to be demolished lifts the bridge block 400 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 lifting trolley assembly 300 of the section to be demolished moves the lifted bridge block 400 to the abutment and crushes it, and finally lifts the rear bridge block 400 to be demolished away by a crane and crushes it, thereby completing the demolition of the entire bridge.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] In addition, in the present solution, the demolished section lifting trolley assembly 200 and the to-be-disassembled section lifting trolley assembly 300 are arranged in the track groove of the closed double track 130 through the track wheel 213. The limiting structure in the track groove can limit the vertical movement of the track wheel 213, so that the demolished section lifting trolley assembly 200 and the to-be-disassembled section lifting trolley assembly 300 have no risk of derailment, have a large bearing capacity, and can improve the stability of the trolley during driving, and reduce the risk of instability of the bridge to be demolished caused by the left and right shaking of the wheels when driving on the traditional type of track.

[0069] 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 arranged horizontally, and a closed double track 130 is arranged on the top thereof. The closed double track 130 is provided with a track groove, and a section lifting trolley assembly 200 can be removed, and a section lifting trolley assembly 300 to be removed is arranged thereon;

[0070] 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.

[0071] 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.

[0072] Furthermore, if Figure 1 As 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;

[0073] 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;

[0074] 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.

[0075] 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 cable 215 are installed, and the dismantling section lifting trolley assembly 200 only installs the cable 215 and does not install the tray 216 for the time being; the four corners of the tray 216 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 cable 215, and the distance between the position of the lifting trolley assembly 300 of the section to be dismantled and the cable 215 is controlled to be 0.5m from the position of the separation joint to ensure construction safety.

[0076] 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;

[0077] 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 216 and breaks it into pieces;

[0078] 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;

[0079] 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.

[0080] 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.

[0081] Specifically, Figure 2 , Figure 4 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;

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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 connected to the four corners of the tray 216 respectively;

[0086] 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;

[0087] 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 lifted and lowered vertically. The tray 216 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.

[0088] The cable 215 is preferably a steel wire rope in this solution;

[0089] like Figure 3 The tray 216 is composed of overlapping polytetrafluoroethylene plates 216a and steel plates 216b. The four corners of the top of the polytetrafluoroethylene plates 216a are respectively provided with connecting parts 216c for connecting with the cables 215. The tray 216 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.

[0090] 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;

[0091] like Figure 2 , Figure 5The 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;

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] Based on the above scheme, the pallet-supported bridge demolition device using a closed track is constructed. This scheme also provides a construction method. The construction steps are as follows:

[0098] 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 216, 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;

[0099] 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 removal section lifting trolley assembly 200, the section to be removed lifting trolley assembly 300 and the cable 215, the cable 215 is passed around the two rotating shafts 214 respectively fixed on the lifting trolley, 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 216 to support the remaining bridge to be removed, such as Figure 1 ;

[0100] 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 216 to the demolition section lifting trolley assembly 200, and the demolition section lifting trolley assembly 200 is moved so that the pallet 216 reaches the bottom of the bridge block 400 to be demolished adjacent to the first bridge block 400 to be demolished, such as Figure 7 shown.

[0101] S4: Separate the adjacent bridge blocks 400 to be demolished from the beam sections to be demolished by using a diamond wire saw, and lift the bridge blocks 400 to be demolished by the demolishing section lifting trolley assembly 200. When the demolishing section lifting trolley assembly 200 moves toward the abutment position along the closed double track 130, the lifting device 214 in the demolishing section lifting trolley assembly 200 drives the two rotating shafts 214 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 8 As shown;

[0102] 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. Fig. 9 As shown;

[0103] S6: The dismantling section lifting trolley assembly 200 returns along the closed double track 130, while lowering the cable 215. Figure 5 As shown, the tray 216 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. Fig.10 shown.

[0104] 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.11 ;

[0105] 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;

[0106] 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;

[0107] 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.

[0108] 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 pallet-supported bridge demolition device using a closed track, 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 closed double tracks, the demolished section lifting trolley assembly, the bottom of the to-be-disassembled section lifting trolley assembly is provided with track wheels corresponding to the closed double tracks and cables, the cables are connected to a tray, 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, 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 demolition section lifting trolley assembly to the abutment and breaks it up. The demolition section lifting trolley assembly cooperates with the to-be-demolished section lifting trolley assembly, and moves on the closed double track. The demolition section lifting trolley assembly sequentially lifts all the to-be-demolished bridge blocks except the rear bridge block to be demolished and the adjacent bridge blocks to be demolished to the abutment and breaks them up. The lifting trolley assembly for the section to be demolished moves on the closed double 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 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 tray-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 for the removal of the section lifting trolley assembly, and the section to be removed lifting trolley assembly is 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 tray-supported bridge demolition device using a closed track 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 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 respectively connected to the two rotating shafts, 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 respectively connected to the four corners of the pallet; 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 tray is used to support the bottom of the bridge block to be demolished. 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 tray-supported bridge demolition device using a closed track according to claim 1 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 cables.

6. The tray-supported bridge demolition device using a closed track according to claim 1 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.

7. The tray-supported bridge demolition device using a closed track according to claim 6 is 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.

8. A construction method of a pallet-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. 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; 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 removal section lifting trolley assembly, the section to be removed lifting trolley assembly and the cable, the cable is passed around and fixed on the two rotating shafts of the lifting trolley, 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 demolished from the beam sections to be demolished by using a diamond wire saw, and lift the bridge blocks to be demolished by the demolishing section lifting trolley assembly. When the demolishing section lifting trolley assembly is moving along the closed double track toward the abutment position, the lifting device in the demolishing section lifting trolley assembly drives two rotating shafts 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 closed double track, and the cable 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.

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