CN110644534A - A buoyancy variable suspension tunnel - Google Patents

Abstract

The invention discloses a buoyancy-variable suspension tunnel which comprises a tunnel frame, a buoyancy-controllable buoyancy tank, a lane, a tunnel balance detection device, a tunnel anti-collision buoyancy tank linking device, a tunnel protective shell, an anti-collision system and an escape system, wherein the buoyancy-controllable buoyancy tank is arranged on the tunnel frame; the floating tunnel adopts a buoyancy-controllable buoyancy tank, the buoyancy of the tunnel is changed by adjusting the buoyancy tank, and the work of each part is controlled by the budget of the vehicle position and the instrument detection of a tunnel balance detection device; and the suspension tunnel construction is simple, and the structural style is simple simultaneously, and it is comparatively convenient to maintain.

Description

A buoyancy variable suspension tunnel

Technical field:

The invention belongs to the technical field of tunnel engineering, in particular to a buoyancy variable suspension tunnel, which is a suspension tunnel that can change buoyancy according to its own gravity, and is suitable for oceans, lakes and reservoirs.

Background technique:

As a new mode of transportation, floating tunnels have been studied in many countries around the world. From the perspective of spatial location, the modes of transportation across rivers, lakes and seas are long-span bridges, suspended tunnels, immersed tunnels, and undersea tunnels from top to bottom. Among them, long-span bridges, immersed tunnels, and submarine tunnels are traditional traffic structures that span rivers and lakes; immersed tunnels are prefabricated sections of tunnel sections, with temporary water stop heads at both ends of each section, and then floated to the tunnel At the axis, it is sunk in the pre-digged trench (foundation trench), the underwater connection between the pipe sections is completed, the temporary water stop head is removed, the foundation trench is backfilled to protect the immersed pipe, and the internal facilities of the tunnel are laid to form a complete underwater channel. Disadvantages of submarine tunnel construction: high construction cost, and many complex problems to be solved in the construction process, such as geology, topography, cracks in rock formations, water leakage and so on. Therefore, the total cost is also high, and the construction period is long. Disadvantages of undersea tunnels: From an ecological point of view, the opening of undersea tunnels will affect the normal living environment of marine organisms, especially undersea organisms.

Compared with the traditional traffic structures spanning rivers, lakes and seas, the suspension tunnel has unique characteristics and its own charm, and is also a very competitive option in many cases. Strength is reflected in the following aspects:

The construction of the suspension tunnel will not have a great impact on the surrounding natural environment, nor will it disturb the geological rock formations along the coast, nor will it affect the natural landscape of the construction site; the suspension tunnel can be operated around the clock, and the conference span bridge Compared with not being affected by extreme weather conditions such as tsunami, strong wind, heavy rain, dense fog, etc., it can ensure the smooth flow of urban traffic.

Suspended tunnels are generally set at 30-50m underwater. Referring to the relevant information provided by the shipping department, this setting depth has little impact on the navigation on the water surface; the floating tunnels in water are different from immersed tunnels and submarine tunnels because they are suspended in the water. , it will not be directly affected by the topography and hydrogeological conditions of the seabed.

The placement of the suspension tunnel is higher than that of the immersed tunnel and the undersea tunnel, which reduces the slope of the car during driving, improves the traffic efficiency, and also reduces the fuel consumption of the car, saves energy and protects the environment.

Scenic spots in parts of the body of water, such as lakes formed by deep canyons between mountains, can also be protected. These advantages are almost impossible to achieve with traditional crossing methods, but the suspension tunnel provides the transportation option in this water situation and is the only option.

In terms of use function, the suspension tunnel can pass cars, trains, small motor vehicles, etc., and can also allow optical fibers, communication equipment, cables, pipeline equipment, etc. that need to pass through the ocean to pass under the sea.

The shortcomings of existing suspension tunnels: At present, there is no systematic and complete theoretical system in the world. It is necessary to break through the fluid-solid coupling mechanism of long-span suspension structures, the bearing capacity characteristics of suspension tunnel structures in deep water environment, and the stability of structural support systems under severe sea conditions. and other major core scientific problems, as well as a series of engineering and technical issues such as the formulation of structural design standard systems, the research and development of new materials for high-toughness and high-strength special structures, construction techniques, construction methods, equipment manufacturing, and risk assessment in deep water complex conditions.

Invention content:

The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and to provide a buoyancy variable suspension tunnel, which is a suspension tunnel that completely relies on buoyancy to maintain its own balance.

The technical scheme provided by the present invention is: a buoyancy variable suspension tunnel, which is special in that it includes a tunnel frame, a buoyancy controllable buoyancy box, a lane, a tunnel balance detection device, a tunnel anti-collision buoyant box linking device, and a tunnel protective shell , collision avoidance system and escape system;

The tunnel frame is equipped with a buoyancy controllable buoyancy box, a lane and a tunnel balance detection device, the buoyancy controllable buoyancy box is fixed on the frame, the lane is connected and fixed with the buoyancy controllable buoyancy box, and a tunnel balance is set at the lower and middle position of the lane. a detection device; the tunnel frame is provided with a tunnel protection shell; the two ends of the tunnel frame are respectively connected to the anti-collision system through the tunnel anti-collision floating box link device; the two ends of the tunnel are equipped with a vehicle weight detection device;

The structural material of the tunnel frame is made of reinforced concrete, which can make the tunnel structure stronger; the external protection material of the tunnel frame is selected from carbon fiber composite material or glass fiber composite material;

The buoyancy controllable floating box is arranged at the upper, lower, left and right positions of the tunnel frame, and the buoyancy controllable floating box includes a shell, the two ends of the shell are hemispherical heads, and the shell is provided with a controllable floating box The main warehouse and the controllable floating box auxiliary warehouse, the controllable floating box auxiliary warehouse is located on both sides of the controllable floating box main warehouse; the controllable floating box main warehouse is provided with two exhaust valves; the controllable floating box The auxiliary warehouse is equipped with air inlet and outlet valve, water inlet and outlet valve and water inlet pressure pump, which can change the buoyancy of the tunnel by controlling the water inlet and outlet, and the air inlet and outlet;

The tunnel balance detection device is located under the middle of the lane, and the tunnel balance vehicle detection device adopts a gyroscope, which can provide accurate azimuth, level, position, speed and acceleration signals; each detection device detects the signal and transmits it to the computer. The computer calculates and processes, and sends out control signals;

The anti-collision system is connected with the tunnel protective shell through the tunnel anti-collision buoyancy box linking device, and the anti-collision system is composed of the internal connecting device of the anti-collision system, the anti-collision floating box protective shell, and the internal floating box of the anti-collision system; The protective shell of the collision buoyancy box is triangular, one of which is close to and fixed to the tunnel protective shell. The inner buoyancy box of the anti-collision system is in the center of the protective shell of the anti-collision buoyancy box, and the anti-collision buoyant box protection is connected to the frame through the internal connection device of the anti-collision system. The shell and the internal floating box of the anti-collision system are relatively fixed; the internal floating box of the anti-collision system is made of FRP material, and the structure of the external impacted part is guaranteed to be inward with the maximum strength without being damaged by its strength and toughness. sunken;

The tunnel anti-collision buoyant box linking device uses a common mechanical connection structure, and pins are installed on the tunnel protective shell and the anti-collision buoyant box protective shell, and connecting holes are left on the tunnel anti-collision buoyancy box link device; It is necessary to align the connection holes on the tunnel anti-collision buoyancy box linking device, and insert the pins on the tunnel protective shell and the anti-collision buoyant box protective shell to connect;

The escape system is located on both sides of the lane, and the two sides of the lane are connected to the escape cabin storage space through the escape system entrance, each escape cabin storage space stores more than two escape cabins, and the escape cabin storage space is provided with an escape cabin ejection port, which is directly connected to the sea; The escape cabin has an entrance to the escape cabin, an oxygen supply system, an escape cabin seat, and an escape cabin power system; the entrance to the escape cabin is connected to the cabin by means of a hatch that moves outside the cabin and is pressure-sealed; the oxygen supply system is divided into There are two parts, one part is an oxygen storage device, which is arranged between the shell and the escape cabin seat, and there is sufficient oxygen stored in it, and the other part is an oxygen supply device, which is installed on the escape cabin seat, and the oxygen storage device is connected with the supply device. ;The seat of the escape cabin is fixed by the seat belt; the power system of the escape cabin is placed at the bottom of the escape cabin, and the jet power and ejection are used to make the escape cabin quickly rush out of the tunnel;

A concave-convex structure is arranged on the outermost part of the tunnel interface. The concave-convex structure includes a groove for a concave-convex waterproof structure and a convex groove for a concave-convex waterproof structure. The concave-convex structure is sealed with a waterproof sealing material; When the link nut column rotates forward, it is connected with the link nut interface of another section, and turns into it; when rotating, the distance between the two tunnels is shortened, so that the convex groove of the concave-convex waterproof structure enters the groove of the concave-convex waterproof structure, and the waterproof sealing material is squeezed.

Further, a balance detector is provided on the left and right buoyancy controllable floating tanks.

Further, at least three reinforcement rings are arranged inside the shell of the buoyancy controllable floating tank, and are arranged at the equal points of the shell.

The beneficial effects of the present invention are: 1. The use of foam concrete can provide a certain buoyancy for the tunnel; 2. The buoyancy controllable floating box is an important structure to maintain the upper and lower balance of the tunnel, and the buoyancy of the tunnel can be changed by adjusting the floating box. , the change of its buoyancy is determined by the test of the vehicle weight detection device at both ends of the tunnel; 3. The external protective structural material uses carbon fiber composite material, which can play a good role in waterproofing and protection; 4. The balance detection system and related The instrument can detect the balance state of the tunnel in real time through data, and generate a digital signal, which is processed by the computer system when it is opened to traffic, and generates the work order of the controllable buoyancy buoyancy box to control the controllable buoyancy box; 5. The construction of the floating tunnel is simple, and the structure is simple. Maintenance is more convenient.

Description of drawings:

Fig. 1 is the vertical sectional schematic diagram of the present invention;

Fig. 2 is the A-A sectional schematic diagram of Fig. 1;

Fig. 3 is the top schematic view of the present invention;

Fig. 4 is the front view schematic diagram of the present invention;

Fig. 5 is the B-B sectional schematic diagram of the buoyancy controllable floating tank of Fig. 1;

Fig. 6 is the C-C sectional schematic diagram of the lane of Fig. 1;

Figure 7 is a cross-sectional view of a lane of the present invention;

Fig. 8 is the structural representation of the connection nut of the present invention;

Fig. 9 is the structural representation of the connection nut interface of the present invention;

Fig. 10 is the cross-sectional structural schematic diagram of the anti-collision buoyancy box of the present invention;

11 is a horizontal cross-sectional view of the escape system of the present invention;

Fig. 12 is the A-A sectional view of Fig. 11;

Fig. 13 is the B-B sectional view of Fig. 11;

Figure 14 is a schematic diagram of the interior of the escape cabin of the present invention.

In the picture: 1 tunnel frame, 2 lane ventilation ducts, 3 buoyancy controllable pontoons, 4 lanes, 5 tunnel balance detection devices, 6 tunnel anti-collision pontoon link devices, 7 anti-collision system internal connection devices, 8 anti-collision pontoons Protective shell, 9 internal floating box of anti-collision system, 10 concave-convex waterproof structure groove, 11 concave-convex waterproof structure convex groove, 12 escape cabin, 13 escape cabin ejection port, 14 link stud, 15 tunnel protection shell, 17 link nut interface, 18 air inlet and outlet valve, 19 water inlet and outlet valve, 20 controllable floating box main compartment, 21 controllable floating box auxiliary compartment, 22 water inlet pressure pump, 23 lane ventilator, 24 nut column base, 25 thrust telescopic column, 26 turning power machine, 27 standoff fixing buckle, 28 escape system entrance, 29 escape cabin storage space, 30 escape cabin entrance, 31 oxygen supply system, 32 escape cabin seat, 33 escape cabin power system.

Detailed ways:

For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings.

As shown in Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14, a buoyancy variable suspension tunnel includes a tunnel frame 1 and a buoyancy controllable floating box 3. Lane 4, tunnel balance detection device 5, tunnel anti-collision floating box linking device 6, tunnel protection shell 15, anti-collision system and escape system; firstly prefabricate lane 4 and tunnel frame 1, and weld buoyancy controllable floating box 3 To the tunnel frame 1, install the lane 4 and the tunnel balance detection device 5 in the tunnel frame 1, install the lane ventilation duct 2 and the in-lane ventilator 23 in the space above the lane 4; install the tunnel protection shell 15 outside the tunnel frame 1; The two ends of the frame 1 are respectively connected to the anti-collision system through the tunnel anti-collision floating box link device 6;

The structural material of the tunnel frame 1 uses reinforced concrete, which can make the tunnel structure stronger and ensure the overall stability of the tunnel; the external protection material of the tunnel frame 1 is selected from carbon fiber composite materials or glass fiber composite materials, which can well play a role in waterproofing and waterproofing. Protective effects;

There are 12 buoyancy controllable pontoons 3, which are respectively arranged on the upper, lower, left and right positions of the tunnel frame 1, 8 on the upper and lower sides, 4 on the left and right, and the 8 upper and lower pontoons are mainly used according to the size of the traffic load. , Change the buoyancy of the tunnel to maintain the depth of the tunnel in the water, the left and right 4 floating boxes are mainly used to maintain the balance of the left and right, and the balance detector is installed on the left and right buoyancy controllable floating boxes, and the left and right floating boxes are based on the signal of the balance detector. , and the tunnel balance detection device 5 is jointly detected and controlled, so as to achieve higher detection accuracy of the tunnel and the best control effect; each detection device detects the signal, transmits it to the computer, and is processed by the computer to send a control signal to change the left and right floating. The buoyancy of the box can be balanced in the horizontal direction; the buoyancy controllable floating box 3 includes a cylindrical shell, the main body of the shell is a carbon fiber structure, the two ends of the shell are hemispherical heads, and the hemispherical heads are connected by welding and sealing; The interior of the shell is divided into five compartments that are sealed with each other along the axial direction of the shell by the compartment steel plate. There are two on both sides of the main tank 20 of the floating tank, and two on one side; two exhaust valves are installed on the main tank 20 of the controllable floating tank, and the air inlet and outlet valve 18, the water inlet and outlet valves 19 and 19 are installed on the auxiliary tank 21 of the controllable floating tank. The water inlet pressure pump 22; at least 3 reinforcing rings are arranged inside the casing, and they are arranged at the equal points of the casing; the buoyancy of the floating box is adjusted through the air inlet and outlet valve 18 and the water inlet and outlet valve 19, and the buoyancy can be used to control the floating box 3 Complete the splicing and sinking of long-distance pipelines;

The tunnel balance detection device 5 is fixed under the middle of the lane 4, and the gyroscope used (futaba series gyroscope, its GY520 and jr's G750T belong to the same level, the highest end is GY701 (collecting all the functions of GY520 and gv-1 speedometer) )) is a mechanical device, the main part of which is a rotor that rotates at a very high angular speed to the rotating shaft, and the rotor is installed in a bracket; add an inner ring frame to the central axis passing through the rotor, then the gyroscope can surround the plane The two axes are free to move; then, an outer ring frame is added to the inner ring frame; this gyroscope has two gimbal rings, which can move freely around the three axes of the plane. The gyro instrument can provide accurate azimuth, level, position, speed and acceleration signals; the sensing data obtained by the sensor is used to perceive whether the tunnel is left and right balanced, and the state of the tunnel is calculated through computer analysis and calculation, so that the computer sends instructions to control the controllable The buoyancy buoyancy box 3 is used to ensure the balance of the bridge; when the tunnel tilts to the left, the computer sends an instruction to make the left buoyancy controllable buoyancy box 3 discharge water and air, and the right buoyancy controllable buoyancy box 3 enters water and air, so as to balance the tunnel ; When tilting to the right, the working principle is similar to that of tilting to the left, the right buoyancy controllable floating box 3 discharges water and air, and the left buoyancy controllable floating box 3 enters water and air;

Vehicle weight detection devices are installed at both ends of the tunnel, and the weight of vehicles entering the tunnel can be measured by referring to the existing motor vehicle weight detection system on the expressway. At the position in the tunnel, the computer sends out signal instructions to control the controllable buoyancy buoyancy box to change the buoyancy; under normal conditions, when the vehicle flow is stable, the tunnel can maintain its own stability through its own inertia. It needs to change its own buoyancy to maintain balance when passing through a large-mass vehicle;

The anti-collision system is connected to the tunnel protective shell 15 through the tunnel anti-collision buoyancy box linking device 6, and the anti-collision system is composed of the anti-collision system internal connecting device 7, the anti-collision floating box protective shell 8, and the anti-collision system internal floating box 9, which are installed in the anti-collision system. Both sides of the tunnel; the anti-collision buoyancy box protective shell 8 is triangular, one of which is close to and fixed on the tunnel protective shell 15, and the floating box 9 inside the anti-collision system is in the center of the anti-collision floating box protective shell 8, passing through the interior of the anti-collision system The connecting device 7 connects the frame to connect the anti-collision buoyancy box protective shell 8 and the inner buoyant box 9 of the anti-collision system to make the two relatively fixed; the main function of the anti-collision system is to provide buoyancy and reduce the impact of various underwater situations on the tunnel to prevent Reduce the damage of the tunnel; the internal floating box 9 of the collision avoidance system adopts FRP material (Fiber Reinforced Polymer, or Fiber Reinforced Plastic, FRP for short) is made of reinforced fiber materials, such as glass fiber, carbon fiber, aramid fiber, etc., A composite material formed by winding, molding or pultrusion with a matrix material; according to different reinforcing materials, common fiber reinforced composite materials are divided into glass fiber reinforced composites (GFRP), carbon fiber reinforced composites (CFRP) and Aramid fiber reinforced composite material (AFRP); because fiber reinforced composite material has the following characteristics: (1) high specific strength, large specific modulus; (2) material properties can be designed: (3) corrosion resistance and durability performance Good; (4) The thermal expansion coefficient is similar to that of concrete; these characteristics make FRP materials meet the needs of modern structures to develop large spans, towering, heavy loads, light weight and high strength, and work in harsh conditions, as well as modern building construction. Therefore, it is more and more widely used in various civil buildings, bridges, highways, marine, hydraulic structures and underground structures and other fields; with its advantages of light weight, corrosion resistance and high mechanical strength, it can To ensure a certain safety of the tunnel; this structure dissipates energy through the internal and external structures. When encountering waves and other conditions, the deformation of the external structure dissipates energy and dissipates energy. Under the premise of being damaged, it will sag inward with the maximum strength, and the outer box structure will take advantage of the excellent properties of complete elasticity and low strain rate of the FRP material, by slowly releasing the deformation energy to push back the external impact work to form the reaction work of the floating box. The impact force is further consumed; the inner structure of the floating box 9 in the anti-collision system is designed with lower rigidity and weaker constraints than the outer structure. When the outer structure of the floating box is impacted, the inner structure is more rigid than the outer structure. Large extrusion deformation space, when the outer structure is impacted, when the remaining part of the energy is transmitted to the inner member through the connecting structure of the inner and outer structures, the inner structure absorbs the periphery of the floating box through its larger deformation energy dissipation and dissipation The remaining kinetic energy after the energy dissipation of the box structure; the tunnel anti-collision floating box link device 6 uses a common mechanical connection structure, and pins are installed on the tunnel protective shell 15 and the anti-collision floating box protective shell 8, and the tunnel anti-collision floating box is linked. A connecting hole is left on the device 6; During installation, it is only necessary to align the connection holes on the tunnel anti-collision buoyancy box linking device 6, and the pins on the tunnel protective shell 15 and the anti-collision buoyant box protective shell 8 can be inserted and connected;

The escape system is located on both sides of the lane 4, and the two sides of the lane 4 are connected to the escape cabin storage space 29 through the escape system entrance 28. Each escape cabin storage space 29 stores more than two escape cabins 12, and the escape cabin storage space 29 is above the escape cabin ejection. The port 13 can be directly connected to the sea; the escape cabin 12 has an escape cabin entrance 30, an oxygen supply system 31, an escape cabin seat 32, and an escape cabin power system 33; the escape cabin entrance 30 adopts a hatch door that moves outside the cabin The oxygen supply system 31 is divided into two parts, one part is an oxygen storage device, which is arranged between the shell and the escape cabin seat, and there is sufficient oxygen stored in it, and the other part is an oxygen supply device. It is arranged on the seat of the escape cabin, and the oxygen storage device is connected with the supply device; the seat 32 of the escape cabin is fixed by a safety belt, which can ensure the safety of personnel on the seat of the escape cabin; the power system 33 of the escape cabin is placed in The bottom of the escape pod 12 uses jet power and ejection to make the escape pod 12 quickly rush out of the tunnel;

A concave-convex structure is arranged on the outermost surface of the tunnel interface, and the concave-convex structure includes a concave-convex waterproof structure groove 10 and a concave-convex waterproof structure convex groove 11. In the concave-convex structure, high-strength composite rubber is used as the waterproof sealing material at the interface; the rotating power machine 26 rotates to push the thrust The telescopic column 25 is extended, pushes the nut column base 24 to rotate forward along the nut column fixing buckle 27, and is connected with the link nut interface 17 of another section when the link nut column 14 rotates forward. The convex groove 11 of the waterproof structure enters the groove 10 of the concave-convex waterproof structure, so that the waterproof rubber is squeezed to achieve a sealing effect;

The connection of the suspension tunnel mainly uses the nut-type connection structure to connect the two ends. One section of the tunnel is connected with the telescopic nut column through the connection structure. The connection structure is the rotating power machine 26 and the thrust telescopic column 25, and the other section of the tunnel is left with corresponding The position of the nut interface, when connecting, the rotating power machine 26 and the thrust telescopic column 25 are activated at the same time, so as to push the nut column to rotate forward, and then enter the nut interface of the corresponding end; six connecting structure columns are set at each tunnel interface, basically six positions It is distributed evenly to ensure its safety; the concave-convex structure is used on the outermost surface of the tunnel interface, and the sealing effect is good; in addition, the connecting structure should be used as the strongest position in the tunnel, with titanium alloy as the main material, supplemented by other metals;

All the above components are connected with the tunnel frame and are fixed on the frame, and then poured with foam concrete to fill the space of each component, but leave a channel for subsequent workers to carry out construction when filling; the entire tunnel is poured with foam concrete , greatly improving the stability and safety of the suspension tunnel.

In the buoyancy variable suspension tunnel of the present invention, the entrance and exit of the tunnel should be at a certain distance from the coast and the shore, leaving a section of the onshore tunnel, which is mainly to install the device for the weight of the vehicle, and the ability to accurately measure the weight of the vehicle is the key to maintaining the balance of the tunnel; The two ends of the floating tunnel are closed. Use materials that can be dismantled inside to block the key pipeline openings and the traffic space at both ends; when the tunnel is not connected to the connecting part during the sinking process, ensure that no water enters the interior, so that the interior The working environment is normal; in the process of tunnel descending, the construction vessel is fixed, and the sinking and ascending are controlled by changing its own buoyancy, which greatly reduces the difficulty of construction; when the tunnel sinks to a suitable position, the tunnel is suspended by control, Through the connection of the construction ship, the tunnel is kept stable and moved slowly, so that the unconnected part of the tunnel is slowly approached to the connected part, and it is slowly combined, so that the groove of the concave-convex waterproof structure and the convex groove of the concave-convex waterproof structure are aligned, and then Start the rotating power machine to rotate the link nut column into the link nut interface, and press the concave-convex structure to achieve the sealing and waterproof effect by rotating force; in the connected part, construction personnel enter and remove the sealing material, so that the interior can be opened to traffic normally; repeat the above installation process, Make connections for each segment.

It should be understood that the technical features not described in detail in this specification belong to the prior art. The above embodiments are only to describe the preferred embodiments of the invention, but do not limit the scope of the invention. On the premise of not departing from the design spirit of the invention, various modifications made by ordinary engineers and technicians in the art to the technical solutions of the invention and improvements, all should fall within the protection scope determined by the claims of the present invention.

Claims (3)

1. A variable buoyancy suspension tunnel, characterized in that it comprises a tunnel frame (1), a buoyancy controllable floating box (3), a lane (4), a tunnel balance detection device (5), and a tunnel anti-collision floating box linking device (6), tunnel protection shell (15), anti-collision system and escape system; The tunnel frame (1) is provided with a buoyancy controllable buoyancy box (3), a lane (4) and a tunnel balance detection device (5), the buoyancy controllable buoyancy box (3) is fixed on the frame (1), and the lane ( 4) It is connected and fixed with the buoyancy controllable floating box (3), and a tunnel balance detection device (5) is provided at the lower and middle position of the lane (4); the tunnel frame (1) is provided with a tunnel protection shell (15); The two ends of the tunnel frame (1) are respectively connected to the anti-collision system through the tunnel anti-collision floating box link device (6); the two ends of the tunnel are equipped with vehicle weight detection devices; The structural material of the tunnel frame (1) uses reinforced concrete, which can make the tunnel structure stronger; the external protection material of the tunnel frame (1) is selected from carbon fiber composite materials or glass fiber composite materials; The buoyancy controllable buoyancy box (3) is arranged at the upper, lower, left and right positions of the tunnel frame (1). The buoyancy controllable buoyancy box (3) includes an outer shell, and both ends of the outer shell are hemispherical heads. The casing is provided with a controllable floating box main compartment (20) and a controllable floating box auxiliary compartment (21), and the controllable floating box subsidiary compartments (21) are located on both sides of the controllable floating box main compartment (20); The controllable floating tank main compartment (20) is provided with two exhaust valves; the controllable floating tank auxiliary compartment (21) is provided with an air inlet and outlet valve (18), a water inlet and outlet valve (19) and a water inlet pressure The pump (22) changes the buoyancy of the tunnel by controlling the water in and out, and the air in and out; The tunnel balance detection device (5) is located below the middle of the lane (4), and the tunnel balance vehicle detection device (5) adopts a gyroscope, and the gyroscope can provide accurate azimuth, level, position, speed and acceleration signals; each detection device The signal is detected, transmitted to the computer, and processed by the computer to send out the control signal; The anti-collision system is connected with the tunnel protective shell (15) through the tunnel anti-collision buoyancy box linking device (6), and the anti-collision system is composed of the anti-collision system internal connecting device (7), the anti-collision buoyant box protective shell (8), The anti-collision system is composed of an internal floating box (9); the anti-collision floating box protective shell (8) is triangular, one side of which is close to and fixed on the tunnel protective shell (15), and the internal floating box (9) of the anti-collision system is in the shape of a triangle. The center of the anti-collision floating box protective shell (8) is connected to the anti-collision floating box protective shell (8) and the anti-collision system inner floating box (9) through the connection frame of the internal connecting device (7) of the anti-collision system, so that the two are relatively fixed. ; The internal floating box (9) of the anti-collision system is made of FRP material, and the structure of the external impacted part is guaranteed to be dented inward with the maximum strength without being damaged by its strength and toughness; The tunnel anti-collision buoyancy box linking device (6) uses a common mechanical connection structure, and pins are installed on the tunnel protective shell (15) and the anti-collision buoyant box protective shell (8). (6) There are connecting holes; when installing, only need to align the connecting holes on the tunnel anti-collision floating box linking device (6), the pins on the tunnel protective shell (15) and the anti-collision floating box protective shell (8) , you can insert the connection; The escape system is located on both sides of the lane (4), and the two sides of the lane (4) are connected to the escape cabin storage space (29) through the escape system entrance (28), and each escape cabin storage space (29) stores more than two escape cabins (12 ), the escape cabin storage space (29) has an escape cabin ejection port (13), which is directly connected to the sea; the escape cabin (12) has an escape cabin entrance (30), an oxygen supply system (31), and an escape cabin seat. The chair (32), the escape cabin power system (33); the escape cabin entrance (30) is connected to the cabin body by means of a hatch that moves outside the cabin and is pressure-sealed; the oxygen supply system (31) is divided into two parts, one of which is The oxygen storage device is arranged between the shell and the escape cabin seat (32), and sufficient oxygen is stored therein, and the other part is an oxygen supply device, which is arranged on the escape cabin seat (32), and the oxygen storage device is in phase with the supply device. connection; the seat of the escape cabin (32) is fixed by a seat belt; the power system (33) of the escape cabin is placed at the bottom of the escape cabin (12), and uses jet power and ejection to make the escape cabin (12) quickly rush out of the tunnel; A concave-convex structure is arranged on the outermost surface of the tunnel interface, and the concave-convex structure includes a concave-convex waterproof structure groove (10) and a concave-convex waterproof structure convex groove (11). The concave-convex structure is sealed with a waterproof sealing material; Rotate along the nut column fixing buckle (27) in the front, when the link nut column (14) rotates forward, it is connected with the link nut interface (17) of another section, and turns into it; when rotating, the distance between the two tunnels is shortened, so that the concave and convex The convex groove (11) of the waterproof structure enters the groove (10) of the concave-convex waterproof structure, and the waterproof sealing material is squeezed. 2 . The variable buoyancy suspension tunnel according to claim 1 , wherein a balance detector is provided on the left and right buoyancy controllable floating tanks ( 3 ). 3 . 3. A buoyancy variable suspension tunnel according to claim 1, characterized in that, at least three reinforcing rings are provided inside the shell of the buoyancy controllable floating box (3), and are arranged on the outer shell of the shell. Equivalent point.

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