A method for dismantling a highway cross-line farming bridge

Abstract

The present application discloses a method for dismantling a cross-line agricultural bridge on a highway, which belongs to the field of bridge dismantling and solves the current problem that the dismantling of a cross-line agricultural bridge requires long-term traffic closure, long dismantling period and high cost. It includes: setting a Bailey beam support system next to each pier of the cross-line agricultural bridge to be dismantled, and the two ends of each Bailey beam support system are respectively connected to the foundation and the bottom of the beam body. A bridge erection machine is installed above the cross-line agricultural bridge. The beam body is divided into a plurality of blocks using the connection position between each Bailey beam support system and the beam body as a dividing line. Before lifting the block segment, a single-width temporary traffic control is performed on the highway below the block segment. Each block segment is cut, lifted, disassembled, cut, crushed and transported along the dividing line, and then the piers below the block segment are cut and crushed, and the Bailey beam support system that is no longer under stress is removed. The present application can ensure the normal passage of the highway during construction. At the same time, the dismantling period is short and the dismantling cost is low.

Description

Technical Field

[0001] The present application relates to the technical field of bridge demolition, and in particular to a method for demolishing a highway overpass agricultural bridge. Background Art

[0002] In recent years, with the rapid development of urban roads, the construction of municipal roads and other transportation facilities has been increasingly improved. More and more municipal roads need to cross highways for construction. The original highway cross-line farming bridge is very likely to conflict with the newly built municipal bridge, which requires the demolition of the original highway cross-line farming bridge. At the same time, with the increasing number of highway reconstruction and expansion projects, it is also necessary to demolish the existing cross-line farming bridges with insufficient span.

[0003] When the cross-line farming bridge is demolished, it involves the driving safety of the existing highway below, and the construction is difficult. At present, the two-way lanes of the highway are closed, and then the bridge is demolished by blasting or tilting crushing, and then the traffic is opened after it is removed. Some highways with large traffic volume and key line locations do not allow long-term traffic closures, which requires the construction of temporary auxiliary roads along both sides of the highway to divert vehicles to the auxiliary roads, and then close the main lanes. However, there are existing facilities such as high-voltage transmission lines, urban natural gas pipelines, and high-speed railways on both sides of some highways, and it is impossible to build auxiliary roads. In addition, the construction period of auxiliary roads is long and the cost is high, which is not conducive to the construction of various projects. Summary of the invention

[0004] The embodiment of the present application provides a method for dismantling a highway cross-line farming bridge, thereby solving the current problems of long-term traffic closure, long demolition period and high cost when dismantling a highway cross-line farming bridge.

[0005] The embodiment of the present invention provides a method for dismantling a highway overpass agricultural bridge, comprising:

[0006] A Bailey beam support system is respectively arranged beside each pier of the cross-line farming bridge to be demolished, and both ends of each Bailey beam support system are respectively connected to the foundation and the bottom of the beam body;

[0007] Installing a bridge erecting machine above the cross-line farming bridge;

[0008] Using the connection position between each Bailey beam support system and the beam body as a dividing line, the beam body is divided into a plurality of blocks;

[0009] Before lifting the block, temporarily controlling the traffic on the highway under the block in a single lane;

[0010] Each block segment is cut, lifted, disassembled, cut, crushed and transported along the dividing line, and then the piers under the block segment are cut and crushed, and the Bailey beam support system that is no longer under stress is removed.

[0011] In a possible implementation, the Bailey beam support system is respectively arranged beside each pier of the cross-line farming bridge to be demolished, specifically including:

[0012] A Bailey beam support system is respectively arranged beside the piers on both sides of the cross-line farming bridge to be demolished;

[0013] Two of the Bailey beam support systems are arranged beside the middle pier of the cross-line farming bridge to be demolished, and both of the Bailey beam support systems are located on the overtaking lane of the expressway.

[0014] In a possible implementation, the two Bailey beam support systems arranged next to the middle pier are respectively a three-beam Bailey beam support system and a four-beam Bailey beam support system, and the three-beam Bailey beam support system is arranged close to the pier.

[0015] In a possible implementation, the step of installing a bridge erecting machine above the cross-line farming bridge specifically includes:

[0016] The bridge erecting machine is installed above the cross-line farming bridge, the front and rear fulcrums of the bridge erecting machine are located on the abutments at the front and rear ends of the cross-line farming bridge, and the middle fulcrum of the bridge erecting machine is located on the four-frame Bailey beam support system.

[0017] In a possible implementation, performing single-lane temporary traffic control on the highway below the block before lifting the block specifically includes:

[0018] Before lifting the block section, temporary single-lane traffic control is implemented on the expressway below the block section for 30 minutes.

[0019] In a possible implementation, before cutting, lifting, disassembling, cutting, crushing and transporting each of the blocks along the dividing line, the method further includes:

[0020] The back wall of the abutment of the above-mentioned cross-line agricultural bridge is demolished.

[0021] In a possible implementation, the cutting, lifting, disassembly cutting, crushing and clearing of each block along the dividing line, then cutting and crushing the piers under the block, and removing the Bailey beam support system that is no longer under stress, specifically includes:

[0022] cutting the block segment along the dividing line;

[0023] After the cutting is completed, the cut blocks are moved toward the abutment by the bridge erecting machine;

[0024] The block segments are moved out of the abutment back wall and then dismantled and cut;

[0025] After the disintegration and cutting is completed, the blocks are broken and transported;

[0026] The piers below the block segments are cut and broken, and the Bailey beam support system that is no longer under stress is removed.

[0027] In a possible implementation, the cutting of the block segments along the dividing line specifically includes:

[0028] The blocks are cut along the dividing lines using a diamond wire saw.

[0029] In a possible implementation, the beam body is divided into a plurality of blocks using the connection position between each Bailey beam support system and the beam body as a dividing line, specifically including:

[0030] The connection position between each Bailey beam support system and the beam body is used as a dividing line, and the beam body is divided into a first block section, a second block section, a third block section and a fourth block section from one end to the other.

[0031] In a possible implementation, the cutting, lifting, disassembly cutting, crushing and clearing of each block along the dividing line, then cutting and crushing the piers under the block, and removing the Bailey beam support system that is no longer under stress, specifically includes:

[0032] cutting the first block along the dividing line;

[0033] After the cutting is completed, the cut first block segment is moved toward the abutment by the bridge erecting machine;

[0034] The first block is moved out of the abutment back wall and then disassembled and cut;

[0035] After the dismantling and cutting is completed, the first block segment is broken and transported away;

[0036] cutting the second block along the dividing line;

[0037] After the cutting is completed, the cut second block segment is moved toward the abutment by the bridge erecting machine;

[0038] The second block is moved out of the abutment back wall and then disassembled and cut;

[0039] After the dismantling and cutting is completed, the second block segment is broken and transported away;

[0040] Cut and crush the first pier and the second pier under the second block section, and remove the Bailey beam support system that is no longer under stress;

[0041] cutting the fourth block along the dividing line;

[0042] After the cutting is completed, the cut fourth block is moved toward the abutment by the bridge erecting machine;

[0043] The fourth block is moved out of the abutment back wall and then disassembled and cut;

[0044] After the dismantling and cutting is completed, the fourth block is broken and transported away;

[0045] The cut third block is moved toward the abutment by the bridge erecting machine;

[0046] The third block is moved out of the abutment back wall and then disassembled and cut;

[0047] After the dismantling and cutting is completed, the third block segment is crushed and transported;

[0048] The third pier column below the third block section is cut and broken, and the Bailey beam support system that is no longer under stress is removed.

[0049] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0050] The embodiment of the present invention provides a method for dismantling a highway cross-line farming bridge, and the method for dismantling a highway cross-line farming bridge includes: setting a Bailey beam support system next to each pier of the cross-line farming bridge to be dismantled, and the two ends of each Bailey beam support system are respectively connected to the foundation and the bottom of the beam body. A bridge erection machine is installed above the cross-line farming bridge. The beam body is divided into a plurality of blocks with the connection position of each Bailey beam support system and the beam body as a dividing line. Before lifting the block segment, a single-span temporary traffic control is performed on the highway below the block segment. Each block segment is cut, lifted, disassembled and cut, and crushed and transported along the dividing line, and then the piers below the block segment are cut and crushed, and the Bailey beam support system that is no longer under stress is removed. The method for dismantling a highway cross-line farming bridge provided by the embodiment of the present application does not require complete closure of traffic during the dismantling of the cross-line farming bridge, and only single-span temporary traffic control is required, thereby ensuring the normal passage of the highway during the construction period. At the same time, there is no need to build auxiliary roads, which not only shortens the demolition period of the cross-line agricultural bridge, but also reduces the demolition cost of the cross-line agricultural bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 A flowchart of a method for dismantling a highway cross-line farming bridge provided in an embodiment of the present application;

[0053] Figure 2 A schematic diagram of the structure of the Bailey beam support system provided in the embodiment of the present application;

[0054] Figure 3 A schematic diagram of the structure of a Bailey beam support system for a cross-line agricultural bridge provided in an embodiment of the present application;

[0055] Figure 4 A schematic diagram of the structure of the bridge erection machine installation provided in the embodiment of the present application;

[0056] Figure 5 A schematic diagram of the first block cutting and clearing provided in an embodiment of the present application;

[0057] Figure 6 A schematic diagram of cutting a second block provided in an embodiment of the present application;

[0058] Figure 7 A schematic diagram of the second block segment cleaning provided in an embodiment of the present application;

[0059] Figure 8 The bridge erection machine movement diagram provided in the embodiment of the present application Figure 1 ;

[0060] Fig. 9 A schematic diagram of the cutting and removal of the fourth block provided in the embodiment of the present application;

[0061] Fig.10 A schematic diagram of the third block segment cleaning provided in the embodiment of the present application;

[0062] Fig.11 A schematic diagram of the third pier removal provided in the embodiment of the present application;

[0063] Fig.12 The bridge erection machine movement diagram provided in the embodiment of the present application Figure 2 .

[0064] Icons: 1- pier; 2- Bailey beam support system; 3- beam body; 31- first block section; 32- second block section; 33- third block section; 34- fourth block section; 4- foundation; 5- bridge erecting machine; 6- overhead crane. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] In the description of the embodiments of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present invention. The terms "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0067] like Figure 1 As shown, an embodiment of the present invention provides a method for dismantling a highway overpass agricultural bridge, comprising the following steps:

[0068] Step 101: A Bailey beam support system is set up next to each pier of the cross-line farming bridge to be demolished, and the two ends of each Bailey beam support system are connected to the foundation and the bottom of the beam body respectively. Figure 3 As shown, a Bailey beam support system 2 is arranged beside each pier 1 of the cross-line agricultural bridge to be demolished, so as to support the beam body 3, so as to avoid the cutting of the beam body 3 being affected by the overturning of the pier 1 or the lack of force on the pier 1 during the cutting process of the beam body 3, thereby ensuring the smooth demolition of the cross-line agricultural bridge. In addition, the Bailey beam support system 2 is arranged beside the pier 1 to avoid occupying other lanes and ensure the smooth passage of vehicles during the construction period. In actual application, the Bailey beam support system 2 is kept level with the upper surface of the foundation 4. Figure 2As shown, the Bailey beam support system 2 is composed of multiple layers of Bailey beams, so that the Bailey beam support system 2 is stable and easy to install. The bottom layer of Bailey beams is placed on the foundation 4, and the top layer of Bailey beams is tightly fitted with the bottom of the beam body 3. In practical applications, when the Bailey beam support system 2 is less than the height of one layer of Bailey beams during the construction process, the gap between the bottom web of the beam body 3 and the Bailey beam is filled by setting a full layer of I10 I-beams and steel plates, so that the Bailey beam support system 2 is tightly fitted with the bottom of the beam body 3, thereby ensuring that the load of the beam body 3 is evenly transferred to the Bailey beam support system 2.

[0069] Step 102: Install a bridge erecting machine above the cross-line farming bridge. In actual application, a 50-meter double-beam bridge erecting machine is installed above the cross-line farming bridge. Figure 4 As shown, the double-beam bridge erecting machine is equipped with two overhead cranes 6.

[0070] Step 103: Using the connection position between each Bailey beam support system and the beam body as a dividing line, the beam body is divided into a plurality of blocks.

[0071] Step 104: Before lifting the block, perform temporary single-lane traffic control on the highway below the block. In the actual construction process, there is no need to completely close the traffic. During the construction period, only the highway below the block to be lifted needs to be temporarily single-lane traffic controlled. The control time is short and can be performed at night when the traffic flow is small, ensuring the normal traffic on the highway during the construction period.

[0072] Step 105: Cut, lift, disassemble, cut, crush and transport each block along the dividing line, then cut and crush the piers under the block, and remove the Bailey beam support system that is no longer under stress. Through the above steps, the cross-line agricultural bridge can be dismantled without building a driving auxiliary road, thereby reducing the overall construction cost and shortening the construction period. At the same time, it also avoids the damage to the surrounding ecological environment caused by the construction of the driving auxiliary road. In addition, the construction process occupies a small area and is not affected by existing facilities such as high-voltage transmission lines, natural gas pipelines, and high-speed railways on both sides of the highway, and the construction difficulty is low.

[0073] The embodiment of the present invention provides a method for dismantling a highway cross-line farming bridge, and the method for dismantling a highway cross-line farming bridge includes: setting a Bailey beam support system next to each pier of the cross-line farming bridge to be dismantled, and the two ends of each Bailey beam support system are respectively connected to the foundation and the bottom of the beam body. A bridge erection machine is installed above the cross-line farming bridge. The beam body is divided into a plurality of blocks with the connection position of each Bailey beam support system and the beam body as a dividing line. Before lifting the block segment, a single-span temporary traffic control is performed on the highway below the block segment. Each block segment is cut, lifted, disassembled and cut, and crushed and transported along the dividing line, and then the piers below the block segment are cut and crushed, and the Bailey beam support system that is no longer under stress is removed. The method for dismantling a highway cross-line farming bridge provided by the embodiment of the present application does not require complete closure of traffic during the dismantling of the cross-line farming bridge, and only single-span temporary traffic control is required, thereby ensuring the normal passage of the highway during the construction period. At the same time, there is no need to build auxiliary roads, which not only shortens the demolition period of the cross-line agricultural bridge, but also reduces the demolition cost of the cross-line agricultural bridge.

[0074] In actual application, a Bailey beam support system is set up next to each pier of the cross-line farming bridge to be demolished, including:

[0075] A Bailey beam support system is set up next to the piers on both sides of the cross-line farming bridge to be demolished.

[0076] Two Bailey beam support systems are set up next to the middle pier of the cross-line farming bridge to be demolished, and both Bailey beam support systems are located on the overtaking lane of the highway. Figure 3 As shown, two Bailey beam support systems 2 are arranged beside the middle pier 1 of the cross-line farming bridge, and both Bailey beam support systems 2 are located on the overtaking lane of the expressway, and only need to occupy a single overtaking lane, and will not affect the normal passage of other lanes.

[0077] Specifically, the two Bailey beam support systems arranged next to the middle pier are a three-beam Bailey beam support system and a four-beam Bailey beam support system, and the three-beam Bailey beam support system is arranged close to the pier. In practical applications, the three-beam Bailey beam support system is used as a temporary support for the cross-line agricultural bridge to be dismantled, so it is arranged close to the pier 1, and the four-beam Bailey beam support system is used as the middle support point for the installation of the bridge erection machine 5.

[0078] In actual application, a bridge erection machine is installed above the cross-line farming bridge, specifically including:

[0079] A bridge erecting machine is installed above the cross-line farming bridge, and the front and rear support points of the bridge erecting machine are located on the abutments at the front and rear ends of the cross-line farming bridge, and the middle support point of the bridge erecting machine is located on a four-beam Bailey beam support system.

[0080] In actual application, before lifting the block section, temporary single-lane traffic control is carried out on the highway below the block section, including:

[0081] Before lifting the block, a single-lane temporary traffic control is carried out on the highway below the block for 30 minutes. In the actual construction process, not only is the traffic control time short, but the highway does not need to be completely closed, ensuring the normal traffic of the highway during the construction period. At the same time, traffic control can be carried out on the highway according to the traffic flow on the highway, such as choosing to carry out traffic control at night when the traffic flow is small, which greatly ensures the normal traffic of the highway.

[0082] Specifically, before cutting, lifting, dismantling, cutting, crushing and transporting each block along the dividing line, it also includes:

[0083] Removing the back wall of the abutment of the cross-line farming bridge. In practical applications, removing the back wall before cutting the block segment can not only prevent the back wall from affecting the lifting of the block segment, but also prevent the diamond wire saw from getting stuck on the beam body 3 when cutting the block segment.

[0084] In actual application, each block is cut, lifted, disassembled, cut, crushed and transported along the dividing line, and then the piers under the block are cut and crushed, and the Bailey beam support system that is no longer under stress is removed, including:

[0085] The block segments are cut along the dividing line. In practical applications, the block segments are cut along the dividing line by a diamond wire saw.

[0086] After cutting, the cut block is moved toward the abutment by the bridge erecting machine. In practical applications, after the cutting of the block is completed, the cut block is moved toward the abutment closest to the block by the bridge erecting machine 5 to improve the moving efficiency of the block and shorten the demolition period of the cross-line farming bridge.

[0087] The blocks are moved out of the abutment back wall and then dismantled and cut.

[0088] After the dismantling and cutting is completed, the blocks will be broken up and transported away.

[0089] The piers under the block section are cut and broken, and the Bailey beam support system that is no longer under stress is removed.

[0090] In practical applications, the blocks are cut along the dividing line, including:

[0091] Use diamond wire saw to cut the block along the dividing line. Diamond wire saw is a tool for cutting and demolishing mines, rough materials, curved plates, large stone plates, thick concrete, irregular concrete reinforcement, bridges and roads, etc. It has the advantages of easy installation and flexible use.

[0092] In practical applications, the connection position between each Bailey beam support system and the beam body is used as the dividing line to divide the beam body into multiple blocks, including:

[0093] The connection position between each Bailey beam support system and the beam body is used as a dividing line to divide the beam body from one end to the other into a first block section, a second block section, a third block section and a fourth block section. Specifically, according to the number of Bailey beam support systems 2 set between the beam body 3 and the foundation 4, the beam body 3 is divided into four blocks.

[0094] In actual application, each block is cut, lifted, disassembled, cut, crushed and transported along the dividing line, and then the piers under the block are cut and crushed, and the Bailey beam support system that is no longer under stress is removed, including:

[0095] The first block is cut along the dividing line. In practical applications, a diamond wire saw is used to cut the dividing line of the first block 31.

[0096] After the cutting is completed, the cut first block segment is moved toward the abutment by the bridge erecting machine. In practical application, after the cutting of the first block segment 31 is completed, the bridge erecting machine 5 moves the first block segment 31 toward the abutment closest to the first block segment 31 to quickly remove the first block segment 31. Figure 5 As shown, since the first block segment 31 is closer to the left abutment, the first block segment 31 is moved toward the left abutment.

[0097] The first block section is disassembled and cut after being moved out of the abutment back wall. Specifically, when the first block section 31 is moved out of the abutment back wall by 2m to 3m, the first block section 31 moved out of the abutment back wall is disassembled and cut.

[0098] After the dismantling and cutting is completed, the first block segment is crushed and transported. In actual application, after the dismantling and cutting of the first block segment 31 is completed, the first block segment 31 is hoisted to an open area behind the abutment by a 50T crane, and then crushed and transported out of the site by an excavator, and the above steps are repeated until the first block segment 31 is completely transported.

[0099] Cut the second block along the dividing line. Figure 6 As shown, a diamond wire saw is used to cut the boundary line of the second block 32. In practical applications, since there is a highway below the second block 32, after the second block 32 is cut, the first single-width temporary traffic control is required for the highway below the second block 32, and the control time is 30 minutes.

[0100] After cutting, the second cut section is moved toward the abutment by the bridge erection machine. Figure 7 As shown, within the controlled time, the second block section 32 is lifted by the bridge erection machine 5 and moved toward the left abutment.

[0101] The second block section is disassembled and cut after being moved out of the abutment back wall. Specifically, when the second block section 32 is moved out of the abutment back wall by 2m to 3m, the second block section 32 moved out of the abutment back wall is disassembled and cut.

[0102] After the dismantling and cutting is completed, the second block segment is crushed and transported. In actual application, after the dismantling and cutting of the second block segment 32 is completed, it is hoisted to an open area behind the abutment by a 50T crane, and then crushed and transported out of the site by an excavator, and the above steps are repeated until the second block segment 32 is completely transported.

[0103] Cut and break the first and second piers under the second block, and remove the Bailey beam support system that is no longer under stress. Figure 7 As shown, the first pier is on the left and the second pier is in the middle. Diamond wire saw and portable impact drill are used to cut and crush the first and second piers, and the Bailey beam support system 2 and construction fence next to the first pier are removed. The broken pieces of the first pier and the Bailey beam are hoisted out of the site by a crane, and the third and fourth spans of the cross-line agricultural bridge to be removed are used as temporary transportation channels to remove the broken pieces of the second pier. Figure 8 As shown, a second single-lane temporary traffic control is carried out on the expressway for 30 minutes to complete the mobile operation of the bridge erecting machine 5.

[0104] The fourth block is cut along the dividing line. In practical applications, the dividing line of the fourth block 34 is cut by a diamond wire saw.

[0105] After the cutting is completed, the cut fourth block segment is moved toward the abutment by the bridge erecting machine. In practical application, when the cutting of the fourth block segment 34 is completed, the fourth block segment 34 is moved toward the abutment closest to the fourth block segment 34 by the bridge erecting machine 5, so as to quickly remove the fourth block segment 34. Fig. 9 As shown, since the fourth block segment 34 is closer to the right abutment, the fourth block segment 34 is moved toward the right abutment.

[0106] The fourth block section is disassembled and cut after being moved out of the abutment back wall. Specifically, when the fourth block section 34 is moved out of the abutment back wall by 2m to 3m, the fourth block section 34 moved out of the abutment back wall is disassembled and cut.

[0107] After the dismantling and cutting is completed, the fourth block section is crushed and transported. In actual application, after the dismantling and cutting of the fourth block section 34 is completed, it is hoisted to an open area behind the abutment by a 50T crane, and then crushed and transported out of the site by an excavator, and the above steps are repeated until the fourth block section 34 is completely transported.

[0108] The cut third block is moved toward the abutment by the bridge erection machine. Fig. 9As shown, since there is a highway below the third block 33, after the third block 33 is cut, it is necessary to carry out a third single-lane temporary traffic control on the highway below the third block 33 for 30 minutes. Fig.10 As shown, within the controlled time, the third block section 33 is lifted by the bridge erection machine 5 and moved toward the right abutment.

[0109] The third block section is disassembled and cut after being moved out of the abutment back wall. Specifically, when the third block section 33 is moved out of the abutment back wall by 2m to 3m, the third block section 33 moved out of the abutment back wall is disassembled and cut.

[0110] After the dismantling and cutting is completed, the third block segment is crushed and transported. In actual application, after the dismantling and cutting of the third block segment 33 is completed, it is hoisted to an open area behind the abutment by a 50T crane, and then crushed and transported out of the site by an excavator, and the above steps are repeated until the third block segment 33 is completely transported.

[0111] The third pier under the third block is cut and crushed, and the Bailey beam support system that is no longer under stress is removed. Specifically, a diamond wire saw and a portable impact drill are used to cut and crush the third pier, and the Bailey beam support system 2 and the construction fence next to the third pier are removed. Then, a crane is used to lift the fragments of the third pier and the Bailey beam out of the site. Fig.11 This is a schematic diagram of the third pier after removal. Fig.12 As shown, the fourth single-lane temporary traffic control is finally carried out on the expressway for 30 minutes. The moving operation of the bridge erecting machine 5 is completed within the control time. After the movement is completed, a 50T crane is used to lift the remaining Bailey beams and enclosure facilities out of the site.

[0112] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0113] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A method for dismantling a highway cross-line farming bridge, characterized in that: include A Bailey beam support system is respectively arranged beside each pier of the cross-line farming bridge to be demolished, and both ends of each Bailey beam support system are respectively connected to the foundation and the bottom of the beam body; The Bailey beam support system is respectively set up beside each pier of the cross-line farming bridge to be demolished, specifically including: A Bailey beam support system is respectively arranged beside the piers on both sides of the cross-line farming bridge to be demolished; Two of the Bailey beam support systems are arranged beside the middle pier of the cross-line farming bridge to be demolished, and both of the Bailey beam support systems are located on the overtaking lane of the expressway; Installing a bridge erecting machine above the cross-line farming bridge; Using the connection position between each Bailey beam support system and the beam body as a dividing line, the beam body is divided into a plurality of blocks; Before lifting the block, temporarily controlling the traffic on the highway under the block in a single lane; Each block segment is cut, lifted, disassembled, cut, crushed and transported along the dividing line, and then the piers under the block segment are cut and crushed, and the Bailey beam support system that is no longer under stress is removed.

2. The method for dismantling a highway overpass agricultural bridge according to claim 1, characterized in that: The two Bailey beam support systems arranged beside the middle pier are respectively a three-beam Bailey beam support system and a four-beam Bailey beam support system, and the three-beam Bailey beam support system is arranged close to the pier.

3. The method for dismantling a highway overpass agricultural bridge according to claim 2, characterized in that: The bridge erection machine is installed above the cross-line farming bridge, specifically comprising: The bridge erecting machine is installed above the cross-line farming bridge, the front and rear fulcrums of the bridge erecting machine are located on the abutments at the front and rear ends of the cross-line farming bridge, and the middle fulcrum of the bridge erecting machine is located on the four-beam Bailey beam support system.

4. The method for dismantling a highway overpass agricultural bridge according to claim 1, characterized in that: The single-lane temporary traffic control on the highway below the block section before lifting the block section specifically includes: Before lifting the block section, temporary single-lane traffic control is implemented on the expressway below the block section for 30 minutes.

5. The method for dismantling a highway overpass agricultural bridge according to claim 1, characterized in that: Before cutting, lifting, dismantling, cutting, crushing and transporting each block along the dividing line, the process also includes: The back wall of the abutment of the cross-line farming bridge is demolished.

6. The method for dismantling a highway overpass agricultural bridge according to claim 1, characterized in that: The cutting, lifting, disassembly cutting, crushing and clearing of each block along the dividing line, then cutting and crushing the piers under the block, and removing the Bailey beam support system that is no longer under stress, specifically includes: cutting the block segment along the dividing line; After the cutting is completed, the cut blocks are moved toward the abutment by the bridge erecting machine; The block segments are moved out of the abutment back wall and then dismantled and cut; After the disintegration and cutting is completed, the blocks are broken and transported; The piers below the block segments are cut and broken, and the Bailey beam support system that is no longer under stress is removed.

7. The method for dismantling a highway overpass agricultural bridge according to claim 6, characterized in that: The cutting of the block segments along the dividing line specifically includes: The blocks are cut along the dividing lines using a diamond wire saw.

8. The method for dismantling a highway overpass agricultural bridge according to claim 1, characterized in that: The connection position between each Bailey beam support system and the beam body is used as a dividing line to divide the beam body into a plurality of blocks, specifically including: The connection position between each Bailey beam support system and the beam body is used as a dividing line, and the beam body is divided into a first block section, a second block section, a third block section and a fourth block section from one end to the other end.

9. The method for dismantling a highway overpass agricultural bridge according to claim 8, characterized in that: The cutting, lifting, disassembly cutting, crushing and clearing of each block along the dividing line, then cutting and crushing the piers under the block, and removing the Bailey beam support system that is no longer under stress, specifically includes: cutting the first block along the dividing line; After the cutting is completed, the cut first block segment is moved toward the abutment by the bridge erecting machine; The first block is moved out of the abutment back wall and then disassembled and cut; After the dismantling and cutting is completed, the first block segment is broken and transported away; cutting the second block along the dividing line; After the cutting is completed, the cut second block segment is moved toward the abutment by the bridge erecting machine; The second block is moved out of the abutment back wall and then disassembled and cut; After the dismantling and cutting is completed, the second block segment is broken and transported away; Cut and crush the first pier and the second pier under the second block section, and remove the Bailey beam support system that is no longer under stress; cutting the fourth block along the dividing line; After the cutting is completed, the cut fourth block is moved toward the abutment by the bridge erecting machine; The fourth block is moved out of the abutment back wall and then disassembled and cut; After the dismantling and cutting is completed, the fourth block is broken and transported away; The cut third block is moved toward the abutment by the bridge erecting machine; The third block is moved out of the abutment back wall and then disassembled and cut; After the dismantling and cutting is completed, the third block segment is crushed and transported; The third pier column below the third block section is cut and broken, and the Bailey beam support system that is no longer under stress is removed.

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