A tunnel portal structure for road-tunnel combination section in high-cold areas

Abstract

The present invention relates to the technical field of tunnel protection, and specifically discloses a tunnel portal structure of a road-tunnel combination section in a high-cold region, comprising an arch lining, a road plate and a lifting pile assembly, wherein the arch lining is detachably connected to the road plate, and the lifting pile assembly is arranged on the lower side of the road plate, and the lower side of the road plate is fixedly connected to the upper side of the lifting pile assembly. The present invention separates the arch lining from the thick soil-containing ice layer by separating the arch lining and the road plate of the open hole, so that the change of the thick soil-containing ice layer will not affect the arch lining of the open hole, and the road plate is divided into an upper plate and a lower plate, and is connected by an elastic structure, and the supporting piles of the road plate pass through the thick soil-containing ice layer and are directly driven into the underground soil layer, and the supporting piles can be extended and retracted up and down to move the road plate up and down, so that the road plate is separated from the thick soil-containing ice layer, so that the change of the thick soil-containing ice layer will not affect the road plate, and the practicality of the portal is increased.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel protection, and specifically discloses a tunnel portal structure for a road-tunnel combination section in a high-cold region. Background Art

[0002] The route selection of road projects in my country's high-altitude and cold regions may pass through areas with thick soil-containing heavy ice layers. For the road-tunnel junction section, it will be affected by environmental changes and the temperature of tunnel construction and operation. When the thick soil-containing heavy ice layer area is deformed by temperature changes, it will cause the road to deform, crack and be damaged. In addition, when the climate warms, the thick soil-containing heavy ice layer will move to a certain extent. The existing open-cut roadbed is set on the thick soil-containing heavy ice layer, which will result in the open-cut of the tunnel not changing, but the roadbed will move with the movement of the thick soil-containing heavy ice layer, which will cause the open-cut to be damaged. A large amount of human resources will be invested in maintenance. Similar situations occur every year, resulting in huge resource consumption. Summary of the invention

[0003] In view of this, the object of the present invention is to provide a tunnel portal structure for a road-tunnel junction section in a high-altitude and cold region to solve the technical problem that the open tunnel foundation moves while the open tunnel does not move.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A tunnel portal structure for a road-tunnel combination section in a high-cold region comprises an arch lining, a road plate and a lifting pile assembly, wherein the arch lining is detachably connected to the road plate, the lifting pile assembly is arranged on the lower side of the road plate, the lower side of the road plate is fixedly connected to the upper side of the lifting pile assembly, the arch lining is consistent in shape with the lining of the tunnel, and the arch lining is directly constructed on the tunnel, and is a comeback construction based on the tunnel, and a cable structure can be arranged above the arch lining, so that when a thick soil-containing ice layer is deformed, it will not have a significant impact on the arch lining.

[0006] Preferably, a locking cavity is provided on the side of the arch lining, and a road plate locking structure is provided in the locking cavity. There are two locking cavities, which are respectively provided on the left and right sides of the arch lining. A locking groove is provided on the inner wall of the arch lining, and an upward locking hole is provided at the connection between the locking cavity and the arch lining. The locking hole passes through the locking groove, and there are four locking holes. The road plate is locked by four road plate locking structures, so that the road plate is fixed on the arch lining, thereby realizing the connection between the road plate and the arch lining. The state of the open hole at this time is used when the thick soil-containing ice layer has not changed.

[0007] Preferably, the road plate locking structure includes a locking motor, a transmission gear set, a common shaft, a bevel gear set and a locking screw, the bevel gear set is connected to the locking screw by a thread, the transmission gear set consists of a motor bevel gear, a transmission bevel gear and a flat gear, the motor bevel gear is connected to the motor shaft of the locking motor, the motor bevel gear is meshed with the helical tooth edge of the transmission bevel gear, the transmission bevel gear is coaxial with the flat gear, the bevel gear set consists of a shaft bevel gear and a threaded bevel gear, the shaft bevel gear is fixed on the common shaft, the inner wall of the threaded bevel gear is provided with a thread corresponding to the locking screw, and the rotation of the threaded bevel gear can make the locking screw move, the locking motor works to make the motor bevel gear rotate, and the common shaft rotates through the transmission bevel gear and the flat gear, thereby making the shaft bevel gear and the threaded bevel gear rotate, when the threaded bevel gear rotates, because the position of the threaded bevel gear does not change, the locking screw will move, thereby making the locking screw pass through the lock slot to achieve the locking of the road plate.

[0008] Preferably, the road plate comprises an upper plate, a lower plate and an elastic structure, wherein a plurality of the elastic structures are provided, and the plurality of elastic structures are provided between the upper plate and the lower plate, wherein the upper plate comprises a steel plate layer, a concrete layer and a telescopic structure layer, wherein the steel plate layer and the concrete layer are provided with two layers, and the two steel plate layers and the concrete layer are provided at the upper and lower sides of the telescopic structure layer, and the bottom surface of the lower plate is fixedly connected to the lifting pile assembly, and the bottom plate does not change, and the length and width of the upper plate are both smaller than the lower plate, and the two side edges of the lower plate are in contact with the two inner walls of the arch lining, and the elastic structure is similar to a shock absorbing structure, and the elastic structure can move downward when a car passes by on the upper plate, and rebound to its original position under the action of the elastic structure after the car leaves, and when the thick soil-containing ice layer is affected by the regional temperature change, the lifting pile assembly lifts and raises the road plate, and when the car passes by, the upper plate will still be pressed onto the thick soil-containing ice layer, but the thick soil-containing ice layer will not affect the road plate, thereby increasing the practicability of the equipment.

[0009] Preferably, the telescopic structure layer includes a locking block, a support column and a pushing mechanism, two locking blocks are provided, a plurality of support columns are provided, the pushing mechanism is provided in the telescopic structure layer, a gear splitting box is provided in the pushing mechanism, the gear splitting box includes a steering transmission bevel gear, a steering gear shaft and a bearing, four steering transmission bevel gears are provided, the bevel teeth of the four steering transmission bevel gears are meshed in pairs, the steering gear shaft is passed through the steering transmission bevel gear, the right side of the steering gear shaft is fixedly connected to the inner wall of the bearing, the four steering transmission bevel gears are grouped in two, namely, an X-direction gear and a Y-direction gear, the X-direction gear is a transmission gear and the Y-direction gear is a two-side splitting gear, so that the unidirectional movement around the X-axis is changed into two opposite rotations around the Y-axis, thereby realizing the splitting of the rotation and increasing the practicality of the equipment, the support column is provided between the upper and lower steel plate layers and the concrete layer to support the upper and lower steel plate layers and the concrete layer The driving mechanism comprises a telescopic motor, a gear splitting box, a coupling, a telescopic screw rod, a rotating block, a slider, a slide rail and a connecting rod, and the coupling, the telescopic screw rod, the rotating block, the slider, the slide rail and the connecting rod are all provided with two, the telescopic motor is fixedly connected to the gear splitting box through a connecting shaft, the gear splitting box and the coupling are connected through a connecting shaft, the coupling is connected to the telescopic screw rod, the telescopic screw rod and the rotating block are threadedly connected, the rotating block is fixedly connected to the slider, the slider is slidably connected to the slide rail, and the connecting rod is fixedly connected to the rotating block, and the gear splitting box is operated by the telescopic motor, and the rotation is divided into two directions by the one-way rotation under the action of the gear splitting box, and the telescopic screw rod is rotated through the coupling, thereby causing the rotating block to rotate, but under the action of the slider and the slide rail, the rotating block can only move to both sides, thereby driving the connecting rod to move to both sides, thereby pushing the locking block to move to both sides until the locking block completely enters the locking groove.

[0010] Preferably, the lifting pile assembly includes a base, a lifting sleeve rod, a lifting motor, a lifting gear set, a lifting screw rod and a top plate. The lifting sleeve rod is also provided with a lifting pile protection sleeve, and the lifting pile protection sleeve is fixed on the base. The lifting pile protection sleeve is suitable for protecting the structure inside the lifting pile assembly to prevent the thick soil-containing ice layer from moving when melting and then damaging the structure of the lifting pile assembly, thereby extending the service life of the open hole structure and increasing the applicability of the equipment. The outer wall of the upper half of the lifting sleeve rod is provided with a motor mounting seat, and the lifting motor is fixed to the motor mounting seat by screws. The lifting gear set includes three There are bevel gears, two of which have the same wheel diameter, and the gear shaft of the third bevel gear with a larger wheel diameter is the lifting screw, which works through the lifting motor and makes the bevel gear with a larger wheel diameter rotate through the bevel gear with the same wheel diameter, thereby moving the lifting screw, and then moving the top plate, thereby realizing the up and down movement of the lower plate, and finally realizing the movement of the upper plate. When the upper plate moves upward, the road plate is separated from the thick ice layer containing soil, so no matter how the thick ice layer containing soil changes, it will not affect the road surface and roadbed of the open hole, and the lifting pile assembly directly passes through the thick ice layer containing soil, and the base is directly built in the soil layer below the thick ice layer containing soil.

[0011] The working principle and beneficial effects of this solution are:

[0012] The present invention separates the arch lining and the road plate of the open hole from each other so that the arch lining is separated from the thick soil-containing ice layer, so that changes in the thick soil-containing ice layer will not affect the arch lining of the open hole, and the road plate is divided into an upper plate and a lower plate, which are connected by an elastic structure, and the supporting piles of the road plate are directly driven into the underground soil layer through the thick soil-containing ice layer, and the supporting piles can be extended and retracted up and down to move the road plate up and down, so that the road plate is separated from the thick soil-containing ice layer, so that changes in the thick soil-containing ice layer will not affect the road plate, thereby increasing the practicality of the tunnel gate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a tunnel portal structure of a road-tunnel combination section in a high-cold region according to the present invention (state one);

[0014] Figure 2 It is a three-dimensional structural schematic diagram of an embodiment of a tunnel portal structure of a road-tunnel combination section in a high-cold region according to the present invention (state 2);

[0015] Figure 3 This is a side view of a tunnel portal structure of a road-tunnel combination section in a high-cold region according to the present invention (state three);

[0016] Figure 4 for Figure 3 Sectional view of AA;

[0017] Figure 5It is a structural schematic diagram of a road plate locking structure in an embodiment of a tunnel portal structure of a road-tunnel combination section in a high-cold region according to the present invention;

[0018] Figure 6 It is a structural schematic diagram of a lifting pile assembly in an embodiment of a tunnel portal structure of a road-tunnel combination section in a high-cold region according to the present invention;

[0019] Figure 7 It is a schematic diagram of the internal structure of a lifting pile assembly in an embodiment of a tunnel portal structure of a road-tunnel combination section in a high-cold region according to the present invention;

[0020] Figure 8 for Figure 7 Cross-sectional view of BbB;

[0021] Fig. 9 It is a structural schematic diagram of an upper plate in an embodiment of a tunnel portal structure for a road-tunnel combination section in a high-cold region according to the present invention;

[0022] Fig.10 It is a structural schematic diagram of a pushing mechanism in an embodiment of a tunnel portal structure of a road-tunnel combination section in a high-cold region according to the present invention;

[0023] Fig.11 It is a schematic diagram of the internal structure of a gear splitter box in an embodiment of a tunnel portal structure of a road-tunnel combination section in a high-cold region according to the present invention;

[0024] The numbers in the accompanying drawings are as follows: arch lining 1, lock cavity 101, road plate locking structure 102, locking motor 1021, transmission gear set 1022, common shaft 1023, bevel gear set 1024, locking screw 1025, motor bevel gear 1026, transmission bevel gear 1027, flat gear 1028, shaft bevel gear 1029, threaded bevel gear 1030, locking groove 103, locking hole 104, road plate 2, upper plate 201, steel plate layer 2011, concrete layer 2012, telescopic structure layer 2013, locking block 2014, support column 2015, push Mechanism 2016, telescopic motor 20161, gear splitter box 20162, coupling 20163, telescopic screw 20164, rotating block 20165, slider 20166, slide rail 20167, connecting rod 20168, steering transmission bevel gear 20169, steering gear shaft 20170, bearing 20171, lower plate 202, elastic structure 203, lifting pile assembly 3, base 301, lifting sleeve rod 302, lifting motor 303, lifting gear set 304, lifting screw 305, top plate 306, lifting pile protective cover 307. DETAILED DESCRIPTION

[0025] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention.

[0026] The following is further described in detail through specific implementation methods:

[0027] Example

[0028] like Figure 1-11 As shown, a tunnel portal structure of a road-tunnel combination section in a high-cold region includes an arch lining 1, a road plate 2 and a lifting pile assembly 3. The arch lining 1 is detachably connected to the road plate 2, and the lifting pile assembly 3 is arranged on the lower side of the road plate 2. The lower side of the road plate 2 is fixedly connected to the upper side of the lifting pile assembly 3. It is further explained that the arch lining 1 has the same shape as the lining of the tunnel, and the arch lining 1 is directly built on the tunnel, which is a re-entry type construction based on the tunnel, and a cable structure can be arranged above the arch lining 1, so that when the thick soil-containing ice layer is deformed, it will not cause a significant impact on the arch lining 1.

[0029] A locking cavity 101 is provided on the side of the arch lining 1, and a road plate locking structure 102 is provided in the locking cavity 101. There are two locking cavities 101, which are respectively provided on the left and right sides of the arch lining 1. To further explain, a locking groove 103 is provided on the inner wall of the arch lining 1, and an upward locking hole 104 is provided at the connection between the locking cavity 101 and the arch lining 1. The locking hole 104 penetrates the locking groove 103, and there are four locking holes 104. The road plate is locked by four road plate locking structures 102, so that the road plate 2 is fixed on the arch lining 1, and the connection between the road plate 2 and the arch lining 1 is realized. The state of the open hole at this time is used when the thick soil-containing ice layer has not changed.

[0030] The road plate locking structure 102 includes a locking motor 1021, a transmission gear set 1022, a common shaft 1023, a bevel gear set 1024 and a locking screw 1025. The locking motor 1021 is fixedly connected to the transmission gear set 1022, the transmission gear set 1022 is fixedly connected to the common shaft 1023, the common shaft 1023 is fixedly connected to the bevel gear set 1024, and the bevel gear set 1024 is connected to the locking screw 1025 by threads. Further description, the transmission gear set 1022 is composed of a motor bevel gear 1026, a transmission bevel gear 1027 and a flat gear 1028. The motor bevel gear 1026 is connected to the motor shaft of the locking motor 1021. The motor bevel gear 1026 is meshed with the helical teeth of the transmission bevel gear 1027. The transmission bevel gear 1027 is coaxial with the flat gear 1028. The bevel gear set 1024 is composed of a shaft bevel gear 1029 and a threaded bevel gear 1030. The shaft bevel gear 1029 is fixed on the common shaft 1023. The inner wall of the threaded bevel gear 1030 is provided with a screw threaded bevel gear 1030. 25 corresponding threads, and then the rotation of the threaded bevel gear 1030 can make the locking screw 1025 move, and the locking motor 1021 works, so that the motor bevel gear 1026 rotates, and the common shaft 1023 is rotated through the transmission bevel gear 1027 and the flat gear 1028, and then the shaft bevel gear 1029 and the threaded bevel gear 1030 rotate. When the threaded bevel gear 1030 rotates, because the position of the threaded bevel gear 1030 does not change, the locking screw 1025 will move, and then the locking screw 1025 passes through the lock slot 103 to lock the road plate.

[0031] The road plate 2 includes an upper plate 201, a lower plate 202 and an elastic structure 203. There are multiple elastic structures 203, which are arranged between the upper plate 201 and the lower plate 202. The upper plate 201 includes a steel plate layer 2011, a concrete layer 2012 and a telescopic structure layer 2013. The steel plate layer 2011 and the concrete layer 2012 are each provided with two layers, and the two steel plate layers 2011 and the concrete layer 2012 are arranged on the upper and lower sides of the telescopic structure layer 2013. To further illustrate, the bottom surface of the lower plate 202 is fixedly connected to the lifting pile assembly 3, and the bottom plate will not change. The length and width of the upper plate 201 are smaller than the lower plate 202. The two side edges of the lower plate 202 are in contact with the two inner walls of the arch lining 1. The elastic structure 203 is similar to a shock-absorbing structure. The elastic structure 203 can move downward when a car passes by the upper plate 201, and rebound to its original position under the action of the elastic structure 203 after the car leaves. When the thick soil-containing ice layer is affected by the regional temperature change, the lifting pile assembly 3 lifts and raises the road plate 2. When a car passes by, the upper plate will still be pressed onto the thick soil-containing ice layer, but the thick soil-containing ice layer will not affect the road plate 2, thereby increasing the practicability of the equipment.

[0032] The telescopic structure layer 2013 includes a locking block 2014, a support column 2015 and a pushing mechanism 2016. There are two locking blocks 2014, and there are multiple supporting columns 2015. The pushing mechanism 2016 is arranged in the telescopic structure layer 2013. Both sides of the pushing mechanism 2016 are fixedly connected to the two locking blocks 2014. A gear dividing box 20162 is arranged in the pushing mechanism 2016. Further description, the support column 2015 is arranged between the upper and lower steel plate layers 2011 and the concrete layer 2012 to support the upper and lower steel plate layers 2011 and the concrete layer 2012, the pushing mechanism 2016 includes a telescopic motor 20161, a gear splitting box 20162, a coupling 20163, a telescopic screw rod 20164, a rotating block 20165, a slider 20166, a slide rail 20167 and a connecting rod 20168, and the coupling 20163, the telescopic screw rod 20164, the rotating block 20165, the slider 20166, the slide rail 20167 and the connecting rod 20168 are each provided with two, the telescopic motor 20161 is fixedly connected to the gear splitting box 20162 by a connecting shaft, the gear splitting box 20162 is connected to the coupling 20163 by a connecting shaft, and the coupling 20163 is connected to the telescopic screw rod 20164. 164 is connected, the telescopic screw rod 20164 is connected to the rotating block 20165 through a threaded connection, the rotating block 20165 is fixedly connected to the slider 20166, the slider 20166 is slidably connected to the slide rail 20167, the connecting rod 20168 is fixedly connected to the rotating block 20165, and the telescopic motor 20161 works to make the gear dividing box 20162 work. Under the action of the gear dividing box 20162, the rotation is divided into two directions from one direction, and the telescopic screw rod 20164 is rotated through the coupling 20163, thereby making the rotating block 20165 rotate. However, under the action of the slider 20166 and the slide rail 20167, the rotating block 20165 can only move to both sides, thereby driving the connecting rod 20168 to move to both sides, and then pushing the locking block 2014 to move to both sides until the locking block 2014 completely enters the locking groove 103.

[0033] The gear splitting box 20162 includes a steering transmission bevel gear 20169, a steering gear shaft 20170 and a bearing 20171. There are four steering transmission bevel gears 20169, and the bevel teeth of the four steering transmission bevel gears 20169 are meshed in pairs. The steering gear shaft 20170 is passed through the steering transmission bevel gear 20169, and the right side of the steering gear shaft 20170 is fixedly connected to the inner wall of the bearing 20171. Further explanation: the four steering transmission bevel gears 20169 are grouped in two, namely, an X-direction gear and a Y-direction gear. The X-direction gear is a transmission gear and the Y-direction gear is a two-way split gear, so that the unidirectional movement around the X-axis is changed into two opposite rotations around the Y-axis, realizing the rotation splitting and increasing the practicality of the equipment.

[0034] The lifting pile assembly 3 includes a base 301, a lifting sleeve rod 302, a lifting motor 303, a lifting gear set 304, a lifting screw rod 305 and a top plate 306. The base 301 is fixedly connected to the lifting sleeve rod 302, the lifting sleeve rod 302 is fixedly connected to the lifting motor 303, the lifting motor 303 is fixedly connected to the lifting gear set 304, the lifting gear set 304 is fixedly connected to the lifting screw rod 305, and the lifting screw rod 305 is fixedly connected to the top plate 306. To further illustrate, a motor mounting seat is provided on the outer wall of the upper half of the lifting sleeve 302, and the lifting motor 303 is fixed to the motor mounting seat by screws. The lifting gear set 304 includes three bevel gears, two of which have the same wheel diameter, and the gear shaft of the third bevel gear with a larger wheel diameter is the lifting screw 305. The lifting motor 303 works and the bevel gear with a larger wheel diameter is rotated by the bevel gear with the same wheel diameter, thereby moving the lifting screw 305, and then moving the top plate 306, thereby realizing the up and down movement of the lower plate 202, and finally realizing the movement of the upper plate 201. When the upper plate 201 moves upward, the road plate 2 is separated from the thick soil-containing ice layer, so no matter how the thick soil-containing ice layer changes, it will not affect the road surface and roadbed of the open hole, and the lifting pile assembly 3 directly passes through the thick soil-containing ice layer, and the base 301 is directly built in the soil layer below the thick soil-containing ice layer.

[0035] A lifting pile protection sleeve 307 is also provided outside the lifting sleeve rod 302, and the lifting pile protection sleeve 307 is fixed on the base 301. Further explanation, the lifting pile protection sleeve 307 is suitable for protecting the structure inside the lifting pile assembly 3, preventing the thick soil-containing ice layer from moving when melting and then damaging the structure of the lifting pile assembly 3, thereby extending the service life of the open hole structure and increasing the applicability of the equipment.

[0036] The following is an explanation of the method for using the tunnel portal structure of the road-tunnel combination section in the high-cold region:

[0037] S1, in the season when the deep soil-containing ice layer has not changed, the telescopic motor 20161 works to make the gear splitter box 20162 work. Under the action of the gear splitter box 20162, the rotation is divided from one-way to two-way, and the telescopic screw rod 20164 is rotated through the coupling 20163, thereby making the rotating block 20165 rotate. However, under the action of the slider 20166 and the slide rail 20167, the rotating block 20165 can only move to both sides, thereby driving the connecting rod 20168 to move to both sides, and then pushing the locking block 2014 to move to both sides until the locking block 2014 completely enters the locking groove 103;

[0038] S2, after the locking block 2014 completely enters the locking groove 103, the locking motor 1021 works to make the motor bevel gear 1026 rotate, and the common shaft 1023 rotates through the transmission bevel gear 1027 and the flat gear 1028, thereby making the shaft bevel gear 1029 and the threaded bevel gear 1030 rotate. When the threaded bevel gear 1030 rotates, since the position of the threaded bevel gear 1030 remains unchanged, the locking screw 1025 moves, thereby making the locking screw 1025 pass through the locking groove 103 to lock the road plate. At this time, the two sides of the road plate are fixed to the two sides of the arch lining 1, and the lifting pile assembly 3 is used to support the road plate;

[0039] S3, when the regional temperature affects the thick soil-containing ice layer, the steps of S1 and S2 are executed in reverse, so that the road plate is separated from the arch lining 1, and the lifting motor 303 works, and the bevel gear with a larger wheel diameter is rotated through the bevel gear with the same wheel diameter, so that the lifting screw 305 moves, and then the top plate 306 moves, and finally the upper plate 201 moves upward to separate from the thick soil-containing ice layer. At this time, no matter how the thick soil-containing ice layer changes, it will not affect the road plate, and when a car passes by, the upper plate will be appropriately pressed down a short distance, and rebound under the action of the elastic structure 203 after the car leaves.

[0040] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the present invention.

Claims

1. A tunnel portal structure for a road-tunnel junction in a high-cold region, characterized by: It includes an arch lining, a road plate and a lifting pile assembly, the arch lining is detachably connected to the road plate, the lifting pile assembly is arranged on the lower side of the road plate, and the lower side of the road plate is fixedly connected to the upper side of the lifting pile assembly; the arch lining is consistent with the lining shape of the tunnel, and the arch lining is directly built on the tunnel; a locking cavity is provided on the side of the arch lining, and a road plate locking structure is provided in the locking cavity, and two locking cavities are provided, which are respectively provided on the left and right sides of the arch lining; a locking groove is provided on the inner wall of the arch lining, and an upward locking hole is provided at the connection between the locking cavity and the arch lining, the locking hole passes through the locking groove, and there are four locking holes, and the road plate is locked by four road plate locking structures so that the road plate is fixed on the arch lining. The state of the open hole at this time is used for deep soil ice When the layer does not change; the road plate locking structure includes a locking motor, a transmission gear set, a common shaft, a bevel gear set and a locking screw, the locking motor is fixedly connected to the transmission gear set, the transmission gear set is fixedly connected to the common shaft, the common shaft is fixedly connected to the bevel gear set, and the bevel gear set is connected to the locking screw by a thread; the road plate includes an upper plate, a lower plate and an elastic structure, the elastic structure is provided with a plurality of, and the plurality of elastic structures are arranged between the upper plate and the lower plate, the upper plate includes a steel plate layer, a concrete layer and a telescopic structure layer, the steel plate layer and the concrete layer are each provided with two layers, and the two steel plate layers and the concrete layer are arranged on the upper and lower sides of the telescopic structure layer; the bottom surface of the lower plate is fixed to the lifting pile assembly The upper plate is connected, the length and width of the upper plate are smaller than the lower plate, the two side edges of the lower plate are in contact with the two inner walls of the arch lining, the elastic structure can enable the upper plate to move downward when a car passes by on the upper plate, and rebound to its original position under the action of the elastic structure after the car leaves, when the thick soil-containing ice layer is affected by the regional temperature change, the lifting pile assembly lifts and raises the road plate, and when the car passes by, the upper plate will still be pressed onto the thick soil-containing ice layer; the lifting pile assembly includes a base, a lifting sleeve rod, a lifting motor, a lifting gear set, a lifting screw and a top plate, the base is fixedly connected to the lifting sleeve rod, the lifting sleeve rod is fixedly connected to the lifting motor, the lifting motor is fixedly connected to the lifting gear set, and the lifting gear set is fixedly connected to the lifting screw The lifting screw is fixedly connected to the top plate; a motor mounting seat is provided on the outer wall of the upper half of the lifting sleeve, and the lifting motor is fixed to the motor mounting seat by screws. The lifting gear set includes three bevel gears, two of which have the same wheel diameter, and the gear shaft of the third bevel gear with a large wheel diameter is the lifting screw. The lifting motor works and the bevel gear with the same wheel diameter is used to rotate the bevel gear with a large wheel diameter, thereby moving the lifting screw, and then moving the top plate, thereby realizing the up and down movement of the lower plate, and finally realizing the movement of the upper plate. When the upper plate moves upward, the road plate is separated from the deep soil-containing ice layer, and the lifting pile assembly directly passes through the deep soil-containing ice layer, and the base is directly built in the soil layer below the deep soil-containing ice layer.

2. The tunnel portal structure for the road-tunnel junction section in high-cold areas according to claim 1 is characterized by: The telescopic structure layer includes a locking block, a supporting column and a pushing mechanism, wherein two locking blocks are provided, a plurality of supporting columns are provided, the pushing mechanism is arranged in the telescopic structure layer, the two sides of the pushing mechanism are fixedly connected to the two locking blocks, and a gear dividing box is arranged in the pushing mechanism.

3. The tunnel portal structure for the road-tunnel junction section in high-cold areas according to claim 2 is characterized by: The gear splitter box includes a steering transmission bevel gear, a steering gear shaft and a bearing. There are four steering transmission bevel gears, and the bevel tooth edges of the four steering transmission bevel gears are meshed in pairs. The steering gear shaft is passed through the steering transmission bevel gear, and the right side of the steering gear shaft is fixedly connected to the inner wall of the bearing.

4. The tunnel portal structure for the road-tunnel junction section in high-cold areas according to claim 3 is characterized by: A lifting pile protection sleeve is also sleeved on the lifting sleeve rod, and the lifting pile protection sleeve is fixed on the base.

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