Track-crossing airbag tube assembly and installation method thereof

Abstract

The present invention provides an over-track airbag tube assembly and an installation method thereof. The over-track airbag tube assembly comprises a first over-track airbag tube, the first over-track airbag tube comprises a first flexible tube body and a first ventilation joint, the first flexible tube body has a first air cavity, the first flexible tube body can expand or contract, the first ventilation joint is installed on the first end of the first flexible tube body, the first air port of the first ventilation joint is connected to the first air cavity, the first ventilation joint has a first control valve, the first control valve can control the first ventilation joint to be turned on or off, the over-track airbag tube assembly can be reused and can prevent a cable channel from being blocked.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel rail crossing tubes, in particular to a rail crossing airbag tube assembly and an installation method of the rail crossing airbag tube assembly. Background Art

[0002] In tunnel construction, it is usually necessary to set up a comprehensive chamber to install communication equipment, power equipment and other equipment. Since cable troughs are set on both sides of the center line of the tunnel, and the cables led out of the comprehensive chamber also need to be divided into two routes and laid to both sides of the comprehensive chamber, each cable is further divided into two branches and laid to the cable troughs on both sides of the center line of the tunnel. Therefore, during the tunnel construction process, it is necessary to set a track pipe at the entrance of the comprehensive chamber to connect the track pipe to the cable troughs on both sides of the center line of the tunnel, so that the cables can pass through the track pipe from one side of the cable trough to the other side of the cable trough; and when the invert and invert filling construction is carried out, the track pipe installation needs to be carried out simultaneously, so that the track pipe is buried and the invert and invert filling are carried out.

[0003] In addition, since the cables led out from the integrated chamber will be divided into two paths from the cable trough close to the integrated chamber and pass down in an outward-facing 8-shaped manner to the cable trough far from the integrated chamber, two groups of track tubes need to be installed when installing the track tubes. The two groups of track tubes are divided into two paths from the cable trough close to the integrated chamber and pass down in an outward-facing 8-shaped manner to the cable trough far from the integrated chamber. The number of track tubes included in each track tube group is set according to different technical requirements. Usually, one group of track tube groups includes 1 to 3 track tubes. Existing track tubes generally use galvanized steel pipes or high-density polyethylene pipes to provide channels for the cables to pass down in the later stage and protect the cables.

[0004] Furthermore, due to the current construction process limitations that the circumferential casting construction of the tunnel arch part requires two times of pouring and the longitudinal casting construction requires three times of pouring, each track pipe needs to be divided into multiple sections and then connected during the installation process. For example, the connection point of two adjacent sections of track pipes is set at the junction of the low side wall and the cable trough, and the connection point of two adjacent sections of track pipes is set at the construction joint of two adjacent construction sections. However, since the track pipe needs to be divided into multiple sections before being connected, the interface of each track pipe section is easily blocked by concrete during the concrete pouring construction process; secondly, in the existing track pipe installation process, if galvanized steel pipes are used, the track pipes need to be cold-pressed into designed curved arc segments through a special steel pipe bending machine, which makes the construction cost high, and the track pipes are prone to burrs when being cut and welded, which makes it easy for the cables to be pierced by the burrs during the subsequent cable threading process, posing certain safety hazards and easily causing the cables to fail; if high-density polyethylene pipes are used, although it is not easy for the burrs to pierce the cables during the cutting process, workers are still required to manually bend them on site, and due to the high hardness of high-density polyethylene pipes, it is difficult to manually bend them, and the construction operation is troublesome.

[0005] Therefore, the overall construction difficulty of the existing tunnel track pipe pre-buried construction is relatively large, the construction quality is low, the construction operation is complicated, and according to relevant construction site surveys, during the tunnel project construction acceptance stage, the rework rate of some track pipe construction is as high as 80%. It can be seen that the current tunnel track pipe pre-buried construction has major defects; in addition, since the track pipe cannot be reused and is a disposable consumable, the construction cost is relatively high. Summary of the invention

[0006] In order to solve the above problems, the main purpose of the present invention is to provide a track-crossing airbag tube assembly that can be reused and can prevent the cable channel from being blocked.

[0007] Another object of the present invention is to provide a method for installing the above-mentioned over-track airbag tube assembly.

[0008] In order to achieve the main purpose of the present invention, the present invention provides a track-crossing airbag tube assembly, which includes a first track-crossing airbag tube, the first track-crossing airbag tube includes a first flexible tube body and a first ventilation joint, the first flexible tube body has a first air cavity, the first flexible tube body can expand or contract, the first ventilation joint is installed on the first end of the first flexible tube body, the first air port of the first ventilation joint is connected to the first air cavity, the first ventilation joint has a first control valve, and the first control valve can control the first ventilation joint to be turned on or off.

[0009] As can be seen from the above, the track-crossing airbag tube assembly can replace the traditional track-crossing tube to provide an underpass for the cables during the tunnel construction process, so that the cables in the cable trough on the side of the integrated chamber away from the tunnel can be connected to the equipment in the integrated chamber by passing through it; among them, when installing the track-crossing airbag tube assembly, there is no need to use a special bending machine for bending like galvanized steel pipes, nor is there a need for workers to spend time and effort to bend it at the construction site like high-density polyethylene pipes, which reduces the construction difficulty and construction cost, and reduces the labor intensity of workers. When forming the underpass, the over-track airbag tube assembly is first installed and fixed according to the designed position, and then the first air cavity is inflated through the first ventilation joint. After the inflation is completed, the first air cavity is sealed through the first control valve to keep the first flexible tube body in an expanded state; then the inverted arch filling is poured, and when the strength of the poured inverted arch filling meets the requirements for template removal, the first air cavity is deflated through the first control valve to shrink the first flexible tube body, and then the over-track airbag tube assembly is taken out from the inverted arch filling to complete the forming of the underpass. In addition, the over-track airbag tube assembly can also be reused, thereby greatly reducing the construction cost and solving the problem that the over-track tube is easily blocked by concrete during the construction of the traditional over-track tube.

[0010] A preferred solution is that the first cross-track airbag tube also includes a second ventilation connector, which is installed on the second end of the first flexible tube body, the second air port of the second ventilation connector is connected to the first air cavity, and the second ventilation connector has a second control valve, which can control the second ventilation connector to be turned on or off.

[0011] It can be seen from the above that the provision of the second ventilation joint can appropriately increase the speed of filling and deflation of the first air cavity, thereby appropriately improving the construction efficiency.

[0012] Another preferred solution is that the first cross-track airbag tube also includes a first pair of joints and a third ventilation joint, the first pair of joints is installed on the second end of the first flexible tube body, the first end of the first pair of joints is connected with the first air cavity, the third ventilation joint is detachably installed on the second end of the first pair of joints, the third air port of the third ventilation joint can be connected with the first pair of joints, the third ventilation joint has a third control valve, and the third control valve can control the third ventilation joint to be turned on or off.

[0013] It can be seen from the above that the above design not only enables the first over-track airbag tube to have a splicing function, but also enables the third ventilation joint to appropriately increase the inflation and deflation speed of the first air cavity and appropriately improve the construction efficiency when the first over-track airbag tube is not spliced ​​with other over-track airbag tubes.

[0014] A further solution is that the over-track airbag tube assembly also includes a second over-track airbag tube and a connecting sleeve, the second over-track airbag tube includes a second flexible tube body, a fourth ventilation joint and a second pair of joints, the second flexible tube body has a second air cavity, the second flexible tube body can expand or contract, the fourth ventilation joint is installed on the first end of the second flexible tube body, the fourth air port of the fourth ventilation joint is connected to the second air cavity, the fourth ventilation joint has a fourth control valve, the fourth control valve can control the fourth ventilation joint to be turned on or off, the second pair of joints is installed on the second end of the second flexible tube body, the first end of the second pair of joints is connected to the second air cavity, the connecting sleeve can be detachably connected to the second end of the first pair of joints and the second end of the second pair of joints respectively and connect the first pair of joints and the second pair of joints.

[0015] As can be seen from the above, the above design enables the track-crossing airbag tube assembly to be used across casting sections, so as to realize the cross-casting section molding of the underpass; when the track-crossing airbag tube assembly needs to be used across casting sections, the first track-crossing airbag tube is first installed on the first casting section according to the design position and the first casting section is constructed. When the construction of the first casting section is completed and the concrete strength reaches the design requirements, the second casting section is constructed. During the construction of the second casting section, the second track-crossing airbag tube is installed on the second casting section according to the design position, and the second track-crossing airbag tube is connected to the first track-crossing airbag tube so that the first air cavity and the second air cavity are connected. Then the second casting section is constructed, and when the construction of the second casting section is completed and the concrete strength reaches the design requirements, the track-crossing airbag tube assembly is removed from the first casting section and the second casting section.

[0016] A further solution is that the over-the-track airbag tube assembly also includes a sealing ring, which is adjacent to the first pair of joints and the third ventilation joint, or the sealing ring is adjacent to the first pair of joints and the second pair of joints.

[0017] As can be seen from the above, the sealing ring can increase the air tightness of the connection between the first pair of joints and the third ventilation joints, or increase the air tightness of the connection between the first pair of joints and the second pair of joints, thereby ensuring the molding quality of the down-through channel and preventing the down-through channel from being narrowed or blocked due to air leakage in the over-track airbag tube assembly.

[0018] A further solution is that the second end of the second flexible pipe body is concave to form a receiving recess, and when the connecting sleeve connects the first pair of joints and the second pair of joints, the first pair of joints, the second pair of joints and the connecting sleeve are all located in the receiving recess.

[0019] As can be seen from the above, the setting of the accommodating recess can reduce or eliminate the gap between the first flexible tube body and the second flexible tube body when the first over-track airbag tube is connected to the second over-track airbag tube, so as to improve the overall stiffness of the over-track airbag tube assembly after inflation, and avoid the problem of shrinkage of the formed under-passing channel due to the gap between the first flexible tube body and the second flexible tube body during the concrete pouring process, thereby ensuring the molding quality of the under-passing channel.

[0020] A further solution is that the second end of the first flexible tube body is provided with a first link belt and a first ring belt, and the second end of the second flexible tube body is provided with a second link belt and a second ring belt, and when the connecting sleeve connects the first pair of joints and the second pair of joints, the first ring belt overlaps with the second ring belt and forms a accommodating cavity, and the first link belt is meshed and connected with the second link belt, and the first link belt and the second link belt are both located in the accommodating cavity.

[0021] It can be seen from the above that the first chain tooth belt provided on the first flexible tube body and the second chain tooth belt provided on the second flexible tube body can improve and ensure the firmness of the connection between the first track-crossing airbag tube and the second track-crossing airbag tube, and the first ring belt provided on the first flexible tube body and the second ring belt provided on the second flexible tube body are used to prevent the concrete from wrapping the first chain tooth belt, the second chain tooth belt, the first pair of joints, the second pair of joints and the connecting sleeve during the concrete pouring process, so that after the construction of the down-through channel is completed, the first track-crossing airbag tube and the second track-crossing airbag tube can be more conveniently disassembled.

[0022] A further solution is that the over-the-track airbag tube assembly further includes two end protection covers, and the two end protection covers are detachably mounted on both ends of the over-the-track airbag tube assembly.

[0023] As can be seen from the above, the end protection cover is used to protect the two ends of the over-track airbag tube assembly during the concrete pouring process to prevent the concrete from wrapping the valve assembly at the end of the over-track airbag tube assembly, so as to ensure that the valve assembly can switch the switch state normally after the concrete pouring is completed, and the end protection cover can also assist in the molding of the end of the underpass to ensure the molding quality of the end of the underpass.

[0024] In order to achieve another object of the present invention, the present invention provides an installation method of a track-crossing airbag tube assembly, wherein the track-crossing airbag tube assembly is the above-mentioned track-crossing airbag tube assembly, and the installation method comprises installing an inverted arch short side wall template; laying out a first track-crossing airbag tube according to a designed position, and fixing the first track-crossing airbag tube on the inverted arch; controlling a first control valve to switch to a conducting state and inflating a first air cavity to expand a first flexible tube body, and after the inflation is completed, controlling the first control valve to switch to a cut-off state; pouring concrete for inverted arch filling, and when the concrete strength of the inverted arch filling meets the template removal requirement, removing the inverted arch short side wall template, and controlling the first control valve to switch to a conducting state to shrink the first flexible tube body, and taking the first track-crossing airbag tube out of the inverted arch filling.

[0025] As can be seen from the above, the over-track airbag tube assembly can replace the traditional over-track tube to provide an underpass for the cables during the tunnel construction process, so that the cables in the cable trough on the side of the integrated chamber far away from the tunnel can be connected to the equipment in the integrated chamber by underpassing; among them, when installing the over-track airbag tube assembly, it does not need to be bent by a special bending machine like galvanized steel pipes, nor does it need to be bent by workers at the construction site in a time-consuming and laborious manner like high-density polyethylene pipes, which reduces the construction difficulty and construction cost, and reduces the labor intensity of workers. In addition, the over-track airbag tube assembly can also be reused, which greatly reduces the construction cost and solves the problem that the over-track tube is easily blocked by concrete during the construction of traditional over-track tubes.

[0026] In order to achieve another object of the present invention, the installation method of the track crossing airbag tube assembly provided by the present invention can also be that the track crossing airbag tube assembly is the above-mentioned track crossing airbag tube assembly, and the installation method includes judging whether the track crossing airbag tube assembly needs to be constructed across the casting section, and if so, installing the short side wall template of the inverted arch in the first casting section; laying out the first track crossing airbag tube in the first casting section according to the designed position, and fixing the first track crossing airbag tube on the first inverted arch of the first casting section; controlling the first control valve to switch to the conducting state and inflate the first air cavity to expand the first flexible tube body, and when the inflation is completed, controlling the first control valve to switch to the cut-off state; pouring the concrete filled in the first inverted arch of the first casting section, and when the concrete strength of the first inverted arch meets the template removal requirement, removing the short side wall template of the inverted arch; constructing the second inverted arch of the second casting section, and when the concrete strength of the second inverted arch meets the template removal requirement, When the degree reaches the requirement, the second casting section is provided with the short side wall formwork of the inverted arch; the second track-crossing airbag tube is arranged according to the designed position, and the second track-crossing airbag tube is fixed on the second inverted arch; the first track-crossing airbag tube and the second track-crossing airbag tube are connected, the first control valve and / or the fourth control valve are controlled to switch to the conducting state, and the first air cavity and the second air cavity are inflated to expand the first flexible tube body and the second flexible tube body. After the inflation is completed, the first control valve and the fourth control valve are controlled to switch to the cut-off state; the concrete pouring of the second inverted arch filling of the second casting section is carried out, and when the concrete strength of the second inverted arch filling meets the requirement of template removal, the short side wall formwork of the inverted arch is removed, and the first control valve and / or the fourth control valve are controlled to switch to the conducting state to shrink the first flexible tube body and the second flexible tube body, and the track-crossing airbag tube assembly is taken out from the first inverted arch filling and the second inverted arch filling.

[0027] As can be seen from the above, the over-track airbag tube assembly can replace the traditional over-track tube to provide an underpass for the cables during the tunnel construction process, so that the cables in the cable trough on the side of the integrated chamber far away from the tunnel can be connected to the equipment in the integrated chamber by underpassing; among them, when installing the over-track airbag tube assembly, it does not need to be bent by a special bending machine like galvanized steel pipes, nor does it need to be bent by workers at the construction site in a time-consuming and laborious manner like high-density polyethylene pipes, which reduces the construction difficulty and construction cost, and reduces the labor intensity of workers. In addition, the over-track airbag tube assembly can be used across the casting section to realize the cross-casting section molding of the underpass; furthermore, the over-track airbag tube assembly can be reused, which greatly reduces the construction cost and solves the problem that the over-track tube is easily blocked by concrete during the construction of the traditional over-track tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a cross-sectional schematic diagram of a first embodiment of a track-crossing airbag tube assembly of the present invention.

[0029] Figure 2It is a cross-sectional schematic diagram of a first over-track airbag tube of a first embodiment of an over-track airbag tube assembly of the present invention.

[0030] Figure 3 It is a cross-sectional schematic diagram of the second over-track airbag tube of the first embodiment of the over-track airbag tube assembly of the present invention.

[0031] Figure 4 It is a cross-sectional schematic diagram of the first track-crossing airbag tube of the first embodiment of the track-crossing airbag tube assembly of the present invention when the first track-crossing airbag tube is used alone.

[0032] Figure 5 It is a schematic cross-sectional view of the local structure of the first embodiment of the over-track airbag tube assembly of the present invention.

[0033] Figure 6 It is a schematic cross-sectional view of the local structure of the first embodiment of the over-track airbag tube assembly of the present invention.

[0034] Figure 7 It is a cross-sectional schematic diagram of a second embodiment of a track-crossing airbag tube assembly of the present invention.

[0035] Figure 8 It is a cross-sectional schematic diagram of a third embodiment of a track-crossing airbag tube assembly of the present invention.

[0036] Fig. 9 It is a schematic diagram of installing a track-crossing airbag tube assembly according to a first embodiment of a method for installing a track-crossing airbag tube assembly of the present invention.

[0037] Fig.10 It is a reference diagram of the first construction state of the first embodiment of the installation method of the track-crossing airbag tube assembly of the present invention.

[0038] Fig.11 It is a reference diagram of the second construction state of the first embodiment of the installation method of the track-crossing airbag tube assembly of the present invention.

[0039] Fig.12 It is a reference diagram of the third construction state of the first embodiment of the installation method of the track-crossing airbag tube assembly of the present invention.

[0040] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0041] First embodiment of the cross-track airbag tube assembly

[0042] Reference Figure 1 The track-crossing airbag tube assembly 100 is used to replace the traditional track-crossing tube to form the underpass channel, so that the cable grooves on both sides of the tunnel centerline can communicate with each other through the underpass channel. The track-crossing airbag tube assembly 100 includes a first track-crossing airbag tube 1, a second track-crossing airbag tube 2, a connecting sleeve 3, a sealing ring 4 and an end protection cover 5.

[0043] Combination Figure 2 The first cross-track airbag tube 1 includes a first flexible tube body 11, a first ventilation joint 12, a first joint 13 and a third ventilation joint 14. The first flexible tube body 11 has a first air cavity 111, so that the first flexible tube body 11 can expand or contract. For example, when the first air cavity 111 is filled with gas, the first flexible tube body 11 will expand and maintain a rigidity that meets the construction requirements. When the gas in the first air cavity 111 is discharged from the first air cavity 111, the first flexible tube body 11 will contract. In addition, when the first air cavity 111 is filled with gas, the diameter of the first flexible tube body 11 is preferably 150 mm to 250 mm, and the diameter of the fully expanded first flexible tube body 11 can be adjusted and set accordingly according to the construction requirements. For example, in the present embodiment, when the first air cavity 111 is filled with gas, the diameter of the first flexible tube body 11 is 200 mm.

[0044] The first ventilation connector 12 is installed on the first end of the first flexible tube body 11, and the first ventilation connector 12 is preferably located on the first end surface of the first flexible tube body 11, so that the downward passage can be better formed. The first air port of the first ventilation connector 12 is connected to the first air cavity 111, and the fifth air port of the first ventilation connector 12 is used to communicate with the air pump, so that the air pump can inflate the first air cavity 111 through the first ventilation connector 12 to expand the first flexible tube body 11. The first ventilation connector 12 has a first control valve 121, which is used to control the first ventilation connector 12 to be turned on or off. For example, when the air pump inflates the first air cavity 111 through the first ventilation connector 12, the first control valve 121 is controlled to switch to the on state, thereby making the first ventilation connector 12 turned on to ensure that the air pump can inflate the first air cavity 111; after the inflation of the first air cavity 111 is completed, the first control valve 121 is controlled to switch to the off state, thereby closing the first ventilation connector 12 to prevent the gas in the first air cavity 111 from leaking from the first ventilation connector 12.

[0045] The first pair of joints 13 is installed on the second end of the first flexible tube body 11, and the first pair of joints 13 is preferably located on the second end surface of the first flexible tube body 11, so that the underpass can be better formed. The first end of the first pair of joints 13 is connected to the first air cavity 111, and the arrangement of the first pair of joints 13 enables the first over-track airbag tube 1 to be docked with the second over-track airbag tube 2, thereby enabling the over-track airbag tube assembly 100 to achieve the cross-casting section molding of the underpass.

[0046] The third ventilation joint 14 is detachably connected to the second end of the first pair of joints 13, so that when the formation of the underpass tunnel does not require the formation of the cross-casting section or the underpass tunnel can be formed only by the first cross-track airbag tube 1, the third ventilation joint 14 can be installed on the first pair of joints 13 to seal or conduct the first pair of joints 13. When the third ventilation joint 14 is installed on the first pair of joints 13, the third air port of the third ventilation pipe is connected to the second end of the first pair of joints 13, and the seventh air port of the third ventilation joint 14 can be used to communicate with the air pump, so that the air pump can inflate the first air cavity 111 through the third ventilation joint 14. The third ventilation joint 14 has a third control valve, and the third control valve is used to control the conduction or closing of the third ventilation joint 14. The setting of the third ventilation joint 14 allows the air pump to inflate the first air cavity 111 through it, so as to appropriately increase the inflation speed of the first air cavity 111, and the third ventilation joint 14 can also appropriately increase the abandonment speed of the first air cavity 111, thereby improving the construction efficiency. Among them, when the air pump inflates the first air cavity 111 through the third ventilation connector 14, the third control valve is controlled to switch to the on state, thereby making the third ventilation connector 14 conductive to ensure that the air pump can inflate the first air cavity 111; when the inflation of the first air cavity 111 is completed, the third control valve is controlled to switch to the off state, thereby closing the third ventilation connector 14 to prevent the gas in the first air cavity 111 from flowing out of the third ventilation connector 14.

[0047] In addition, the second end of the first flexible tube body 11 is provided with a first chain belt 112 and a first ring belt 113 , and the first ring belt 113 is wrapped around the outside of the first chain belt 112 , so that the first chain belt 112 is located between the first ring belt 113 and the first flexible tube body 11 .

[0048] Combination Figure 3 The second over-track airbag tube 2 is used to cooperate with the first over-track airbag tube 1 to realize the cross-casting section molding of the underpass; or when the length of the first over-track airbag tube 1 is not enough, the length of the over-track airbag tube assembly 100 can be extended by connecting with the second over-track airbag tube 2 to ensure that the over-track airbag tube assembly 100 can meet the construction requirements of the underpass. The second over-track airbag tube 2 includes a second flexible tube body 21, a fourth ventilation joint 2 and a second joint 23.

[0049] The second flexible pipe body 21 has a second air cavity 211, so that the second flexible pipe body 21 can expand or contract. For example, when the second air cavity 211 is filled with gas, the second flexible pipe body 21 will expand and maintain a rigidity that meets the construction requirements. When the gas in the second air cavity 211 is discharged from the second air cavity 211, the second flexible pipe body 21 will contract. In addition, when the second air cavity 211 is filled with gas, the diameter of the second flexible pipe body 21 is preferably equal to the diameter of the first flexible pipe body 11. For example, in the present embodiment, when the second air cavity 211 is filled with gas, the diameter of the second flexible pipe body 21 is 200 mm.

[0050] The fourth ventilation connector 2 is installed on the first end of the second flexible tube body 21, and the fourth ventilation connector 2 is preferably located on the second end surface of the second flexible tube body 21, so that the downward passage can be better formed. The fourth air port of the fourth ventilation connector 2 is connected to the second air cavity 211, and the eighth air port of the fourth ventilation connector 2 is used for connecting to the air pump, so that the air pump can also inflate the second air cavity 211 and the first air cavity 111 through the fourth ventilation connector 2 to expand the second flexible tube body 21 and the first flexible tube body 11. The fourth ventilation connector 2 has a fourth control valve 221141, which is used to control the fourth ventilation connector 2 to be turned on or off. For example, when the air pump inflates the second air cavity 211 and the first air cavity 111 through the fourth ventilation connector 2, the fourth control valve 221141 is controlled to switch to the on state, thereby making the fourth ventilation connector 2 turned on to ensure that the air pump can inflate the second air cavity 211 and the first air cavity 111; after the inflation of the second air cavity 211 and the first air cavity 111 is completed, the fourth ventilation connector 2 is controlled to switch to the off state, so that the second ventilation connector is closed, thereby making the fourth ventilation connector 2 cooperate with the first ventilation connector 12 to prevent the gas in the second air cavity 211 and / or the first air cavity 111 from leaking from the fourth ventilation connector 2 and / or the first ventilation connector 12.

[0051] The second pair of joints 23 is installed on the second end of the second flexible tube body 21, and the second pair of joints 23 is preferably located on the second end surface of the second flexible tube body 21, so that the down-passing channel can be better formed. The first end of the second pair of joints 23 is connected to the second air cavity 211. The second pair of joints 23 is arranged so that the second over-track airbag tube 2 can be docked with the first over-track airbag tube 1, so that the over-track airbag tube assembly 100 can realize the cross-casting section molding of the down-passing channel or extend the overall length of the over-track airbag tube assembly 100, so that the over-track airbag tube assembly 100 meets the molding requirements of the down-passing channel.

[0052] Preferably, the second end of the second flexible tube body 21 is concave from the end surface to form a receiving recess 212, and the second joint 23 is located in the receiving recess 212. Further, the second end of the second flexible tube body 21 is provided with a second chain tooth belt 213 and a second ring belt 214, and the second ring belt 214 is wrapped around the outside of the second chain tooth belt 213, so that the second chain tooth belt 213 is located between the second ring belt 214 and the second flexible tube body 21.

[0053] Combination Figure 5 , the connecting sleeve 3 is used to connect with the second end of the first pair of joints 13 and the second end of the second pair of joints 23 respectively, and connect the first pair of joints 13 and the second pair of joints 23, so as to make the first air cavity 111 communicate with the second air cavity 211. After the connecting sleeve 3 connects the first pair of joints 13 and the second pair of joints 23, the first pair of joints 13 and the connecting sleeve 3 are both located in the accommodating recess 212. Among them, the setting of the accommodating recess 212 can reduce or eliminate the gap between the first flexible tube body 11 and the second flexible tube body 21 when the first over-track airbag tube 1 and the second over-track airbag tube 2 are connected, so as to improve the overall stiffness of the over-track airbag tube assembly 100 after inflation, and avoid the problem of shrinkage of the underpass after molding due to the gap between the first flexible tube body 11 and the second flexible tube body 21 during the concrete pouring process, so as to ensure the molding quality of the underpass channel.

[0054] The sealing ring 4 can be installed according to the use of the over-track airbag tube assembly 100. For example, when the over-track airbag tube assembly 100 uses the first over-track airbag tube 1, the sealing ring 4 is adjacent to the first pair of joints 13 and the third ventilation joint 14; when the over-track airbag tube assembly 100 uses the first over-track airbag tube 1 and the second over-track airbag tube 2, the sealing ring 4 is located in the connecting sleeve 3 and adjacent to the first pair of joints 13 and the second pair of joints 23. The sealing ring 4 can increase the air tightness of the connection between the first pair of joints 13 and the third ventilation joint 14, or increase the air tightness of the connection between the first pair of joints 13 and the second pair of joints 23, thereby ensuring the molding quality of the down-passing channel and preventing the down-passing channel from being narrowed or blocked due to air leakage in the over-track airbag tube assembly 100.

[0055] There are two end protection covers 5 , which are detachably mounted on the connecting ends of the over-track airbag tube assembly 100 , respectively. The end protection covers 5 have a receiving position 51 . For example, when the track airbag tube assembly 100 uses the first track airbag tube 1, the two end protection covers 5 are respectively installed at the two ends of the first track airbag tube 1, so that the first end of the first flexible tube body 11 and the first ventilation joint 12 are located in the accommodation position 51 of the first end protection cover 5, and the second end of the first flexible tube body 11, the first pair of joints 13 and the third ventilation joint 14 are located in the accommodation position 51 of the second end protection cover 5; when the track airbag tube assembly uses the first track airbag tube 1 and the second track airbag tube 2, the two end protection covers 5 are respectively installed at the first end of the first flexible tube body 11 and the second end of the second flexible tube body 21, so that the first end of the first flexible tube body 11 and the first ventilation joint 12 are located in the accommodation position 51 of the first end protection cover 5, and the first end of the second flexible tube body 21 and the fourth ventilation joint 2 are located in the accommodation position 51 of the second end protection cover 5.

[0056] Combination Figure 4 When the track-crossing airbag tube assembly 100 uses the first track-crossing airbag tube 1 to form the underpass, the first pair of joints 13 and the third ventilation joint 14 are first connected, and then the first track-crossing airbag is installed and fixed according to the designed position, and then the first air cavity 111 is inflated through the first ventilation joint 12 and / or the third ventilation joint 14, and after the inflation is completed, the first air cavity 111 is sealed through the first control valve 121 and the third control valve to keep the first flexible tube body 11 in an expanded state; then, the two end protection covers 5 are respectively installed on the two ends of the first track-crossing airbag tube 1, and then the inverted arch filling is cast; when the strength of the cast inverted arch filling meets the template removal requirement, the template and the two end protection covers 5 are removed, and then the first air cavity 111 is deflated through the first control valve 121 and / or the third control valve to shrink the first flexible tube body 11, and then the track-crossing airbag tube assembly 100 is taken out from the inverted arch filling to complete the forming of the underpass.

[0057] When the rail-crossing airbag tube assembly 100 needs to be used across a casting section, the first pair of joints 13 and the third ventilation joint 14 are first connected, and then the first rail-crossing airbag is installed on the first casting section according to the designed position, and then the first air cavity 111 is inflated through the first ventilation joint 12 and / or the third ventilation joint 14. After the inflation is completed, the first air cavity 111 is sealed through the first control valve 121 and the third control valve to keep the first flexible tube body 11 in an expanded state; then, the two end protection covers 5 are respectively installed on the two ends of the first rail-crossing airbag tube 1 The first end of the first end casting section is cast, and then the first inverted arch filling of the first end casting section is cast; when the strength of the cast first inverted arch filling meets the template removal requirement, the template is removed and the inverted arch construction of the second end casting section is carried out; then, the end head protection cover 5 and the third ventilation joint 14 on the second end of the first track airbag tube 1 are removed, and the first track airbag tube 1 and the second track airbag tube 2 are connected through the connecting sleeve 3; when the connecting sleeve 3 completes the connection of the first pair of joints 13 and the second pair of joints 23, the first chain tooth belt 112 and the second chain tooth belt 213 are meshed (see Figure 6 ), and the first ring belt 113 and the second ring belt 214 overlap to form an accommodating cavity. At this time, the first chain tooth belt 112 and the second chain tooth belt 213 are both located in the accommodating cavity to prevent the concrete from wrapping the first chain tooth belt 112, the second chain tooth belt 213, the first pair of joints 13, the second pair of joints 23 and the connecting sleeve 3 during the concrete pouring process, so that after the construction of the lower passage is completed, the first track airbag tube 1 and the second track airbag tube 2 can be more conveniently disassembled; when the connection between the first track airbag tube 1 and the second track airbag tube 2 is completed, the second track airbag tube 2 is installed on the second pouring section according to the designed position, and then the first air cavity 111 and the second air cavity 211 are inflated through the first ventilation joint 12 and / or the fourth ventilation joint 2. After the inflation is completed After that, the first air cavity 111 and the second air cavity 211 are sealed by the first control valve 121 and the fourth control valve 221141, so that the first flexible tube body 11 and the second flexible tube body 21 remain in an expanded state; then, the second end protection cover 5 is installed on the first end of the second track-crossing airbag tube 2, and then the second inverted arch filling of the second casting section is cast; when the strength of the cast second inverted arch filling meets the template removal requirement, the template and the two end protection covers 5 are removed, and then the first air cavity 111 and the second air cavity 211 are deflated by the first control valve 121 and / or the fourth control valve 221141 to shrink the first flexible tube body 11 and the second head-shaped tube, and then the track-crossing airbag tube assembly 100 is taken out from the inverted arch filling to complete the molding of the underpass.

[0058] In summary, it can be seen that the track crossing airbag tube assembly provided by the present invention can replace the traditional track crossing pipe to provide an underpass for cables during tunnel construction, so that the cables in the cable trough on the side of the integrated chamber away from the tunnel can be connected to the equipment in the integrated chamber by passing underpass; in addition, the track crossing airbag tube assembly can also be reused, thereby greatly reducing the construction cost and solving the problem that the track crossing pipe is easily blocked by concrete during the construction of traditional track crossing pipes.

[0059] Second embodiment of the track-crossing airbag tube assembly

[0060] Reference Figure 7 The difference between this embodiment and the first embodiment of the track-crossing airbag tube assembly is that:

[0061] In this embodiment, the first pair of joints, the third ventilation joint, the second cross-track airbag tube and the connecting sleeve are cancelled, and a second ventilation joint 62 is installed on the second end of the first flexible tube body 61, and the second ventilation joint 62 is located on the second end surface of the first flexible tube body 61. The second air port of the second ventilation joint 62 is connected to the first air cavity, and the second ventilation joint 62 has a second control valve 621, which can control the second ventilation joint 62 to be turned on or off.

[0062] When the over-track airbag tube assembly does not include a second over-track airbag tube, by directly setting a second ventilation joint 62 on the second end of the first flexible tube body 61, the structure of the first over-track airbag tube 6 can be better simplified, and the setting of the second ventilation joint 62 can appropriately increase the inflation and deflation speed of the first air cavity 611, thereby appropriately improving the construction efficiency.

[0063] The third embodiment of the track-crossing airbag tube assembly

[0064] Reference Figure 8 The difference between this embodiment and the second embodiment of the track-crossing airbag tube assembly is that:

[0065] In this embodiment, the second ventilation connector and the second track airbag tube are eliminated, so that the second end of the first flexible tube body 71 is sealed by itself. Although the second ventilation connector will reduce the inflation and deflation speed of the first air cavity 711 to a certain extent, it can make the structure of the first track airbag tube 7 simpler and more convenient for the production of the track airbag tube assembly.

[0066] First embodiment of the installation method of the over-track airbag tube assembly

[0067] This embodiment takes the over-the-track airbag tube assembly described in the first embodiment of the over-the-track airbag tube assembly as an example to illustrate the installation method of the over-the-track airbag tube assembly. Figures 9 to 12 The installation method of the cross-track airbag tube assembly is as follows:

[0068] First, determine whether the track-crossing airbag tube assembly 81 needs to be constructed across the casting section. If so, first install the inverted arch short side wall templates 83 at both ends of the first inverted arch cast in the first casting section 801.

[0069] Next, the first pair of joints and the third ventilation joint of the first track-crossing airbag tube 81 are connected, and then the first track-crossing airbag tube 81 is laid out on the first inverted arch of the first casting section 801 according to the designed position to ensure the circumferential position and longitudinal position of the first track-crossing airbag tube 81, and then the first track-crossing airbag tube 81 is fixed on the first inverted arch. When fixing the first track-crossing airbag tube 81, a steel bar can be used to make an annular fixing ring to simply fix the first flexible tube body, so as to ensure that the overall curvature of the first track-crossing airbag tube 81 after inflation meets the design requirements.

[0070] Next, at least one air pump is used to connect with the first ventilation connector and / or the third ventilation connector of the first cross-rail airbag tube 81, and the corresponding control valve is controlled to switch to the on state. For example, when the first ventilation connector and the third ventilation connector are both connected to the air pump, the first control valve and the third control valve are controlled to switch to the on state. Subsequently, the air pump is controlled to inflate the first air cavity through the first ventilation connector and / or the third ventilation connector to expand the first flexible tube body.

[0071] Next, the position of the first flexible tube body is precisely adjusted and fixed for a second time to ensure the position accuracy of the first flexible tube body; then, the first control valve and the third control valve are controlled to switch to the cut-off state, the connection between the air pump and the first cross-track airbag tube 81 is removed, and two end protection covers 8111 are respectively installed on the two ends of the first flexible tube body. Among them, the end protection cover 8111 and the first flexible tube body can be wrapped with transparent tape to prevent concrete from entering the end protection cover 8111 during the concrete pouring process.

[0072] Next, the first inverted arch filling 841 of the first pouring section 801 is poured with concrete. When the concrete strength of the first inverted arch filling 841 meets the requirements for formwork removal, the relevant formwork (such as the inverted arch short side wall formwork 83, the inverted arch filling end formwork, etc.) is removed.

[0073] Next, the second inverted arch 822 is constructed on the second pouring section 802 , and when the concrete strength of the second inverted arch 822 reaches the requirement, the inverted arch low side wall formwork 83 is installed on the second pouring section 802 .

[0074] Next, the end protection cover 8111 and the third ventilation joint on the second end of the first flexible tube body are removed, and the first pair of joints and the second pair of joints of the second track airbag tube 82 are fixedly connected by a connecting sleeve; then, the first chain tooth belt and the second chain tooth belt are connected, and the first ring belt and the second ring belt are overlapped. The overlapping part of the first ring belt and the second ring belt can be wrapped with a transparent tape to prevent the concrete from entering the accommodation cavity formed by the first ring belt and the second ring belt during the concrete pouring process, thereby better preventing the concrete from wrapping the chain tooth belt, the connecting sleeve, the first pair of joints and the second pair of joints, etc.

[0075] After the connection between the first over-track airbag tube 81 and the second over-track airbag tube 82 is completed, the second over-track airbag tube 82 is arranged on the second inverted arch 822 of the second casting section 802 according to the designed position to ensure the reversing position and longitudinal position of the second over-track airbag tube 82, and then the second over-track airbag tube 82 is fixed on the second inverted arch 822. When fixing the second over-track airbag tube 82, a ring-shaped fixing ring made of steel bars can also be used to simply fix the second flexible tube body to ensure that the overall curvature of the inflated second over-track airbag tube 82 meets the design requirements.

[0076] Next, at least one air pump is used to dock with the first ventilation connector of the first over-track airbag tube 81 and / or the fourth ventilation connector of the second over-track airbag tube 82, and the corresponding control valve is controlled to switch to the on state. When the air pump is docked with the first ventilation connector of the first over-track airbag tube 81, the end protection cover 8111 on the first end of the first over-track airbag tube 81 needs to be removed first. Subsequently, the air pump is controlled to inflate the first air cavity and the second air cavity through the first ventilation connector and / or the fourth ventilation connector to expand the first flexible tube body and the second flexible tube body.

[0077] Next, the position of the second flexible tube body is precisely adjusted and fixed for a second time to ensure the position accuracy of the second flexible tube body; then, the first control valve and the fourth control valve are controlled to switch to the cut-off state, the connection between the air pump and the over-track airbag tube assembly 81 is removed, and the end protection cover 8111 is installed on the second end of the second flexible tube body. Transparent tape can be used to wrap the end protection cover 8111 and the second flexible tube body to prevent concrete from entering the end protection cover 8111 during the concrete pouring process.

[0078] Then, the concrete of the second inverted arch filling 842 of the second pouring section 802 is poured. When the concrete strength of the second inverted arch filling 842 meets the requirements for formwork removal, the relevant formwork (such as the inverted arch short side wall formwork 83, the inverted arch filling end formwork, etc.) is removed; then, the end head protection cover 8111 is removed, the first control valve and / or the fourth control valve are controlled to switch to the conducting state, the first flexible tube body and the second flexible tube body are contracted, and the track-crossing airbag tube assembly is taken out from the first inverted arch filling 841 and the second inverted arch filling 842, so as to form the underpass 85.

[0079] Next, the ditch cable trough 86 can be constructed for the first casting section 801. When constructing the ditch cable trough 86, the first high-density polyethylene tube 87 can be connected to the first port formed by the track-crossing airbag tube in the first casting section 801; then, the first high-density polyethylene tube 87 is fixed and the template of the ditch cable trough 86 is installed; finally, the casting construction of the ditch cable trough 86 is carried out.

[0080] Next, the ditch cable trough 86 can be constructed for the second casting section 802. When constructing the ditch cable trough 86, the second high-density polyethylene tube 88 can be firstly connected with the second port formed by the track airbag tube in the second casting section 802; then, the second high-density polyethylene tube 88 is fixed and the template of the ditch cable trough 86 is installed; finally, the casting construction of the ditch cable trough 86 is carried out.

[0081] From the above, it can be seen that the over-track airbag tube assembly can replace the traditional over-track tube to provide an underpass for the cables during the tunnel construction process, so that the cables in the cable trough on the side of the integrated chamber far away from the tunnel can be connected to the equipment in the integrated chamber by underpassing; among them, when installing the over-track airbag tube assembly, it does not need to be bent by a special bending machine like galvanized steel pipes, nor does it need to be bent by workers at the construction site in a time-consuming and laborious manner like high-density polyethylene pipes, which reduces the construction difficulty and construction cost, and reduces the labor intensity of workers. In addition, the over-track airbag tube assembly can be used across the casting section to realize the cross-casting section molding of the underpass; furthermore, the over-track airbag tube assembly can be reused, which greatly reduces the construction cost and solves the problem that the over-track tube is easily blocked by concrete during the construction of the traditional over-track tube.

[0082] Second embodiment of the installation method of the over-track airbag tube assembly

[0083] This embodiment takes the over-the-track airbag tube assembly of any one of the first to third embodiments as an example to illustrate the installation method of the over-the-track airbag tube assembly. The installation method of the over-the-track airbag tube assembly is as follows:

[0084] First, determine whether the over-track airbag tube assembly needs to be constructed across the casting section. If not, first install the arch low side wall templates at both ends of the first arch cast in the casting section.

[0085] Next, the first track-crossing airbag tube is laid out on the inverted arch of the casting section according to the designed position (wherein, if the track-crossing airbag tube assembly in the first implementation of the track-crossing airbag tube assembly is used for construction, the first pair of joints and the third ventilation joint of the first track-crossing airbag tube need to be connected first.) to ensure the circumferential position and longitudinal position of the first track-crossing airbag tube, and then the first track-crossing airbag tube is fixed on the inverted arch. When fixing the first track-crossing airbag tube, a steel bar can be used to make an annular fixing ring to simply fix the first flexible tube body to ensure that the overall curvature of the first track-crossing airbag tube after inflation meets the design requirements.

[0086] Next, an air pump is used to connect with the first over-track airbag tube, so that the air pump inflates the first air cavity, thereby expanding the first flexible tube body. Wherein, if the over-track airbag tube assembly in the first implementation of the over-track airbag tube assembly is used for construction, the air pump can be connected to the first ventilation connector and / or the third ventilation connector; if the over-track airbag tube assembly in the second implementation of the over-track airbag tube assembly is used for construction, the air pump can be connected to the first ventilation connector and / or the second ventilation connector; if the over-track airbag tube assembly in the third implementation of the over-track airbag tube assembly is used for construction, the air pump is connected to the first ventilation connector.

[0087] Next, the position of the first flexible tube body is precisely adjusted and fixed for a second time to ensure the position accuracy of the first flexible tube body; then, all control valves are in the cut-off state, the connection between the air pump and the first cross-track airbag tube is removed, and two end protection covers are installed on both ends of the first flexible tube body. Transparent tape can be used to wrap the end protection cover and the first flexible tube body to prevent concrete from entering the end protection cover during the concrete pouring process.

[0088] Next, the concrete pouring of the inverted arch filling of the pouring section is carried out. When the concrete strength of the inverted arch filling meets the requirements for formwork removal, the relevant formwork (such as the inverted arch low side wall formwork, the inverted arch filling end formwork, etc.) is removed; then, the end head protection cover is removed, the control valve is switched to the conducting state, the first flexible tube body is contracted, and the track-crossing airbag tube assembly is taken out from the inverted arch filling, thereby forming an underpass.

[0089] Next, the trench cable trough construction can be carried out on the casting section. During the trench cable trough construction, high-density polyethylene pipes are used to connect the two ends of the track airbag pipe at the construction positions of the trench cable troughs on both sides; then, the high-density polyethylene pipes are fixed and the trench cable trough template is installed; finally, the trench cable trough is cast.

[0090] As can be seen from the above, the over-track airbag tube assembly can replace the traditional over-track tube to provide an underpass for the cables during the tunnel construction process, so that the cables in the cable trough on the side of the integrated chamber far away from the tunnel can be connected to the equipment in the integrated chamber by underpassing; among them, when installing the over-track airbag tube assembly, it does not need to be bent by a special bending machine like galvanized steel pipes, nor does it need to be bent by workers at the construction site in a time-consuming and laborious manner like high-density polyethylene pipes, which reduces the construction difficulty and construction cost, and reduces the labor intensity of workers. In addition, the over-track airbag tube assembly can also be reused, which greatly reduces the construction cost and solves the problem that the over-track tube is easily blocked by concrete during the construction of traditional over-track tubes.

[0091] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cross-track airbag tube assembly, characterized in that: The invention comprises a first cross-track airbag tube, wherein the first cross-track airbag tube comprises: A first flexible pipe body, wherein the first flexible pipe body has a first air cavity, and the first flexible pipe body can expand or contract; A first ventilation connector, wherein the first ventilation connector is mounted on the first end of the first flexible pipe body, wherein the first air port of the first ventilation connector is connected to the first air cavity, and wherein the first ventilation connector has a first control valve, and wherein the first control valve can control the first ventilation connector to be turned on or off; A first pair of joints, the first pair of joints being mounted on the second end of the first flexible pipe body, the first end of the first pair of joints being in communication with the first air cavity; A third ventilation joint, the third ventilation joint is detachably mounted on the second end of the first pair of joints, a third air port of the third ventilation joint is communicable with the first pair of joints, the third ventilation joint has a third control valve, and the third control valve can control the third ventilation joint to be turned on or off; The cross-track airbag tube assembly also includes: A second cross-track airbag tube, the second cross-track airbag tube comprises a second flexible tube body, a fourth ventilation joint and a second pair of joints, the second flexible tube body has a second air cavity, the second flexible tube body can expand or contract, the fourth ventilation joint is installed on the first end of the second flexible tube body, the fourth air port of the fourth ventilation joint is communicated with the second air cavity, the fourth ventilation joint has a fourth control valve, the fourth control valve can control the fourth ventilation joint to be turned on or off, the second pair of joints is installed on the second end of the second flexible tube body, and the first end of the second pair of joints is communicated with the second air cavity; A connecting sleeve, which can be detachably connected to the second end of the first pair of joints and the second end of the second pair of joints respectively and connects the first pair of joints and the second pair of joints.

2. The track-crossing airbag tube assembly according to claim 1, characterized in that: The first cross-track airbag tube also includes: A second ventilation connector is installed on the second end of the first flexible tube body, a second air port of the second ventilation connector is connected to the first air cavity, and the second ventilation connector has a second control valve, which can control the second ventilation connector to be turned on or off.

3. The track-crossing airbag tube assembly according to claim 1, characterized in that: The over-track airbag tube assembly further includes a sealing ring, which is adjacent to the first pair of joints and the third ventilation joint, or adjacent to the first pair of joints and the second pair of joints.

4. The track-crossing airbag tube assembly according to claim 1, characterized in that: The second end of the second flexible pipe body is concavely formed with a receiving recess. When the connecting sleeve connects the first pair of joints and the second pair of joints, the first pair of joints, the second pair of joints and the connecting sleeve are all located in the receiving recess.

5. The track-crossing airbag tube assembly according to claim 3, characterized in that: The second end of the first flexible tube body is provided with a first link belt and a first ring belt, and the second end of the second flexible tube body is provided with a second link belt and a second ring belt. When the connecting sleeve connects the first pair of joints and the second pair of joints, the first ring belt overlaps with the second ring belt and forms a accommodating cavity. The first link belt is meshed and connected with the second link belt, and the first link belt and the second link belt are both located in the accommodating cavity.

6. The track-crossing airbag tube assembly according to any one of claims 1 to 5, characterized in that: The over-the-track airbag tube assembly further comprises two end protection covers, and the two end protection covers are detachably mounted on the two ends of the over-the-track airbag tube assembly respectively.

7. The installation method of the over-track airbag tube assembly is characterized by: The over-the-track airbag tube assembly is the over-the-track airbag tube assembly according to claim 1 or 2, and the installation method comprises: Install the inverted arch low side wall formwork; Laying out the first track-crossing airbag tube according to the designed position, and fixing the first track-crossing airbag tube on the invert; Controlling the first control valve to switch to the on state and inflate the first air cavity to expand the first flexible tube body, and when the inflation is completed, controlling the first control valve to switch to the off state; Concrete pouring for the inverted arch filling is performed. When the concrete strength of the inverted arch filling meets the requirement for formwork removal, the formwork of the short side wall of the inverted arch is removed, and the first control valve is controlled to switch to a conducting state to shrink the first flexible tube body, and the first track-crossing airbag tube is taken out from the inverted arch filling.

8. The installation method of the over-track airbag tube assembly is characterized by: The over-the-track airbag tube assembly is the over-the-track airbag tube assembly according to any one of claims 1, 4 to 7, and the installation method comprises: Determine whether the cross-track airbag tube assembly needs to be constructed across the casting section, and if so, install the inverted arch low side wall template in the first casting section; Laying out the first track-crossing airbag tube in the first casting section according to the designed position, and fixing the first track-crossing airbag tube on the first invert of the first casting section; Controlling the first control valve to switch to the on state and inflate the first air cavity to expand the first flexible tube body, and when the inflation is completed, controlling the first control valve to switch to the off state; Casting concrete for filling the first inverted arch of the first casting section, and when the strength of the concrete filled in the first inverted arch meets the requirement for removing the formwork, removing the formwork of the short side wall of the inverted arch; The second inverted arch of the second pouring section is constructed, and when the concrete strength of the second inverted arch reaches the requirement, the inverted arch low side wall formwork is installed on the second pouring section; Laying out the second cross-track airbag tube according to the designed position, and fixing the second cross-track airbag tube on the second inverted arch; The first over-track airbag tube and the second over-track airbag tube are connected, the first control valve and / or the fourth control valve are controlled to switch to a conducting state, and the first air cavity and the second air cavity are inflated to expand the first flexible tube body and the second flexible tube body. When the inflation is completed, the first control valve and the fourth control valve are controlled to switch to a cut-off state; Concrete pouring of the second inverted arch filling of the second pouring section is performed. When the concrete strength of the second inverted arch filling meets the requirement for formwork removal, the formwork of the short side wall of the inverted arch is removed, and the first control valve and / or the fourth control valve are controlled to switch to a conducting state to shrink the first flexible tube body and the second flexible tube body, and the track-crossing airbag tube assembly is taken out from the first inverted arch filling and the second inverted arch filling.

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