A sealed device for box culvert tunnel segments and a construction method for box culvert tunnel segments

Abstract

The present invention discloses a sealing device and construction method for box culvert tunnel segments. The sealing device for box culvert tunnel segments is used to seal the segments and includes: a steel structure member having a shape the same as or similar to the inner cross-sectional shape of the segment; an airbag disposed around the outer periphery of the steel structure member, and after inflation, both inner and outer sides of the airbag abut against the inner wall of the segment and the outer periphery of the steel structure member; the airbag is connected to an air charging and discharging device; guide wheels arranged on the outer periphery of the steel structure member and abutting against the inner wall of the segment; a water inlet provided on the steel structure member, and a valve is provided at the water inlet; an exhaust pipe penetrating both sides of the steel structure member. The technical solution provided by the present invention realizes no water ingress at both ends to generate buoyancy. At the same time, after installation, there is no need for divers to work underwater, and the device can be recovered on the water, saving manpower and improving safety performance.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater tunnel engineering, and more specifically, to a sealing device for a box culvert tunnel segment and a construction method for a box culvert tunnel segment. Background Art

[0002] When large box culvert segments or tunnel segments are installed underwater, the two ends of the entire segment need to be sealed to generate buoyancy for facilitating underwater installation operations. If the ports are not sealed, a floating crane ship with a large lifting load will be used, increasing the construction cost. Usually, a certain space is left at the port part of the segment to pre-cast bolt members, and before construction, a sealing steel frame is installed at the port to achieve overall sealing.

[0003] The currently common construction process flow:

[0004] Segment casting construction acceptance → Installation of port sealing steel frame → Overall hoisting onto the ship → Transportation to the installation site → Hoisting the segment with a floating crane → Hoisting the segment by the floating crane to the underwater installation position → Adjusting the installation accuracy → Divers diving to remove the external port sealing steel frame A → Hoisting the steel frame A out of the water → Divers going to the inner docking port of the segment to remove the sealing steel frame B → Hoisting the steel frame B out of the water → Installing other devices → Installation completed

[0005] During the whole process, there are the following disadvantages: The sealing steel frames at both ends are all made of steel structure, with large weight, and need to be fixedly connected to the joint port through fasteners; when disassembling the sealing steel frame underwater, a lot of fasteners need to be removed, increasing the workload of divers underwater; when two segments are butted, divers need to enter along the open end of the segment, and after reaching the docking interface position, the steel frame is removed. Because the segment is long and the internal water condition is complex, it is required that the life support system for divers on the water surface must be reliable, and there are also risks of operating in a narrow underwater space and the workload of removing a large number of fasteners;

[0006] For the recovery of the steel frame, a floating crane ship is needed for hoisting, and for the steel frame on the segment docking seam, it needs to be dragged out from the segment, and this work is quite difficult; currently, there are also other construction methods such as removing the steel frames at both ends after the segment is initially seated underwater and then butting the segments to avoid the above problems, but problems such as long-term hoisting load or increased secondary lifting force and difficult and inaccurate secondary installation docking are generated. Summary of the Invention

[0007] An object of the present invention is to provide a new technical solution for a sealing device and a construction method for a box culvert tunnel segment.

[0008] According to the first aspect of the present invention, a sealing device for a box culvert tunnel segment is provided for sealing the segment, including a steel structure member having a shape the same as or similar to the inner cross-sectional shape of the segment;

[0009] An airbag is disposed around the outer periphery of the steel structure member. After inflation, both the inner and outer sides of the airbag abut against the inner wall of the segment and the outer periphery of the steel structure member; the airbag is connected to an air charging and discharging device;

[0010] Guide wheels are arranged on the outer periphery of the steel structure member;

[0011] A water inlet is provided on the steel structure member, and a valve is provided at the water inlet;

[0012] An exhaust pipe penetrates through both sides of the steel structure member.

[0013] Thus, it can be seen that through the airbag, a sealed space can be formed between the sealing device for the box culvert tunnel segment and the segment. When the segment enters the water, its buoyancy is increased, enabling it to float on the water surface, reducing the force required for transporting the segment on the water. At the same time, by providing a water inlet and an exhaust port, after the segment is transported to the designated position, water can be quickly injected into the segment and air can be exhausted, reducing its buoyancy and causing it to naturally submerge to the designated position. After the segment reaches the designated position, the airbag is deflated, and the sealing device for the box culvert tunnel segment can be easily removed from the segment through the guide wheels.

[0014] Optionally, there is a sealed space along the circumference inside the steel structure member, and the inner circumference of the airbag abuts against the sealed space.

[0015] Thus, it can be seen that the sealed space arranged along the circumference inside the steel structure member can further increase the buoyancy generated by the sealing device for the box culvert tunnel segment in water, so as to basically offset the overall weight of the sealing device in water. In this way, the traction force required when pulling out the segment is minimized, and even when a diver dives to operate, the sealing device can be easily moved, thus realizing lightweight underwater operation.

[0016] Optionally, a channel penetrating through both sides of the steel structure member is provided on the steel structure member, and a hemispherical buffer bladder is further provided on one side of the steel structure member. The hemispherical buffer bladder is fixed to the steel structure member through a compression flange to seal the channel.

[0017] Thus, it can be seen that the bladder has strength and elasticity, can buffer the water flow pressure and the change and fluctuation of the airbag gas pressure, and realizes the adjustment of the force balance of the segment.

[0018] Optionally, traction seats are respectively provided on both sides of the steel structure member.

[0019] Optionally, a traction rope is further included, and the traction rope is connected to the traction seat.

[0020] It can be seen that the cooperation of the traction seat and the traction rope can more conveniently and quickly drag the box culvert tunnel pipe segment sealing device.

[0021] Optionally, the guide wheels are arranged in two groups along the steel frame member, and the airbag is located between the two groups of guide wheels.

[0022] It can be seen that the stability of the box culvert tunnel pipe segment sealing device in the pipe segment is further improved by providing two sets of guide wheels, making it less likely to fall over and easier to drag.

[0023] Optionally, the inflation and deflation device is an inflation and deflation tube.

[0024] It can be seen from this that connecting the inflation and deflation equipment above the water surface through the inflation and deflation pipe can reduce the probability of failure of the inflation and deflation equipment set up underwater, and improve the stability and reliability of the device. At the same time, the inflation and deflation pipe is connected above the water surface, and the gas in the pipe section can be naturally discharged from the pipe section through the inflation and deflation pipe by relying on the underwater pressure.

[0025] According to a second aspect of the present invention, a method for constructing a box culvert tunnel pipe segment is provided, comprising the following steps:

[0026] Step 1: Use connectors to connect the two box culvert tunnel pipe segment sealing devices;

[0027] Step 2: Arrange the connected box culvert tunnel pipe segment sealing devices at both ends of the pipe segment respectively;

[0028] Step 3: Using an inflation and deflation device, inflate the airbag provided on the outer periphery of the steel frame member of the box culvert tunnel pipe segment sealing device until the inner and outer sides of the airbag completely abut against the inner wall of the pipe segment and the outer periphery of the steel frame member, and close the valves of the water inlet and exhaust pipe provided on the steel frame member to form a seal at both ends of the pipe segment;

[0029] Step 4: transport the pipe segment sealed by the box culvert tunnel pipe segment sealing device to the water surface at the location to be installed;

[0030] Step 5: Open the valves of the water inlet and the exhaust pipe, and gradually let water in and exhaust air out of the sealed space formed by the pipe segment and the box culvert tunnel pipe segment sealing device, so that the buoyancy decreases and the pipe segment sinks to the installation position;

[0031] Step 6: Deflate the airbag using the inflation and deflation device, and use the traction device to tow the box culvert tunnel pipe segment sealing device. Under the action of the traction device, the box culvert tunnel pipe segment sealing device slides out of the pipe segment by relying on the guide wheels arranged along the circumference of the steel frame member.

[0032] Optionally, a channel penetrating both sides of the steel structure member is provided on the steel structure member, and a hemispherical buffer bladder is further provided on one side of the steel structure member. The hemispherical buffer bladder is fixed to the steel structure member through a compression flange 9 to seal the channel; when connecting two box culvert tunnel segment sealing devices with a connecting member, the sides of the steel structure member equipped with the hemispherical buffer bladder are arranged opposite to each other.

[0033] Optionally, the connecting member is a steel cable or a metal truss.

[0034] According to the embodiments disclosed in the present invention, the following beneficial effects are achieved:

[0035] Buoyancy is generated by preventing water from entering both ends. To facilitate the rapid removal of the device, the seal can be released by deflating on the water surface, and the sealing device can be dragged underwater through a cable to enable the sealing device to slide and move inside the segment, making it more convenient to slide out of the segment. In this way, without the need for divers, after the segment is installed in place once, the sealing device can automatically release the seal, be towed and slid out of the segment, and be hoisted and recovered.

[0036] Other features and advantages of the present invention will become clear through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings incorporated in and constituting a part of this specification illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0038] Figure 1 It is an installation sectional view of a box culvert tunnel segment sealing device provided according to an embodiment;

[0039] Figure 2 It is a front view of a box culvert tunnel segment sealing device provided according to an embodiment;

[0040] Figure 3 It is a front view of a box culvert tunnel segment equipped with a box culvert tunnel segment sealing device provided according to an embodiment;

[0041] Figure 4 It is a first perspective structure diagram of a box culvert tunnel segment sealing device provided according to an embodiment;

[0042] Figure 5 It is a second perspective structure diagram of a box culvert tunnel segment sealing device provided according to an embodiment;

[0043] Figure 6 It is a schematic diagram of the flexible connection of a box culvert tunnel segment sealing device provided according to an embodiment;

[0044] Figure 7Schematic diagram of the rigid connection of the segment sealing device for a culvert tunnel according to an embodiment;

[0045] Figure 8 Schematic diagram of the series connection of the segment sealing device for a culvert tunnel according to an embodiment;

[0046] Figure 9 Schematic diagram of the parallel connection of the segment sealing device for a culvert tunnel according to an embodiment.

[0047] The markings in the figure are as follows:

[0048] 1 - Segment of culvert tunnel, 1a - Segment to be installed, 1b - Segment that has been installed, 2 - Airbag, 3 - Guide wheel, 4 - Exhaust pipe, 5 - Traction seat, 6 - Steel structure member, 7 - Water inlet, 8 - Hemispherical buffer bladder, 9 - Compression flange, 10 - Bolt, 11 - Inflation and deflation device, 12 - Shackle, 13 - Traction rope, 14 - Confined space, 15 - Valve, 16 - Connector, 16a - Steel cable, 16b - Metal truss, 17 - Water inlet pipe, 18 - Intermediate chamber. Detailed implementation mode

[0049] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0050] The following description of at least one exemplary embodiment is actually merely illustrative and in no way restricts the present invention or its application or use.

[0051] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification.

[0052] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0053] Embodiment 1:

[0054] As Figures 1 - 5As shown in the figure, this embodiment provides a sealing device for box culvert tunnel segments, including a steel structure member 6. The steel structure member 6 is the main structure of the sealing device for box culvert tunnel segments. In this embodiment, the steel structure member 6 is a quasi-square structure with chamfers at four corners. However, in practical applications, the shape of the steel structure member 6 can be arbitrarily set according to the inner cross-section of the box culvert tunnel segment 1 to be fitted and installed, and can be any shape and size such as circular, rectangular, etc., as long as the shape of the steel structure member 6 is the same as or similar to the inner cross-section of the box culvert tunnel segment 1 and the size is slightly smaller than the inner cross-section of the box culvert tunnel segment 1, so as to ensure that the sealing device for box culvert tunnel segments can be fitted into the box culvert tunnel segment 1 without leaving a large gap.

[0055] An airbag is arranged circumferentially on the steel structure member 6. In this embodiment, the airbag is wound around the circumference of the steel structure member 6 in a ring shape. An air charging and discharging device 11 is connected to the airbag 2. The air charging and discharging device 11 can inflate or deflate the airbag 2. When the sealing device for box culvert tunnel segments is placed at a specified position in the box culvert tunnel segment 1, the air charging and discharging device 11 inflates the airbag 2, and the airbag 2 gradually expands. After the inflation is completed, the outer circumference of the airbag 2 completely abuts against the inner wall of the box culvert tunnel segment 1, and the inner circumference of the airbag 2 completely abuts against the outer circumference of the steel structure member 6. The airbag 2 and the steel structure member 6 cooperate to form a sealed structure at one end in the box culvert tunnel segment 1. When a sealing device for box culvert tunnel segments is arranged at each of the two ends in the box culvert tunnel segment 1, the box culvert tunnel segment 1 cooperates with two steel structure members 6 with airbags 2 to form a sealed space inside the box culvert tunnel segment 1; the airbag 2 is not limited to a ring shape, and it can be in multiple groups of shapes, as long as it can ensure that the steel structure member 6 can be completely covered by the airbag, and each independent airbag has an air charging and discharging device 11 to inflate or deflate the airbag 2. For example, the airbag 2 can be 4, and arranging one airbag 2 on each of the four sides in the circumferential direction of the steel structure member 6 can also achieve the same effect. Of course, the airbag 2 can also be 3, 5 or any other number. Preferably, the air charging and discharging device 11 is an air charging and discharging pipe connected to the airbag 2. The length of the air charging and discharging pipe is selected according to actual needs. The air charging and discharging pipe is connected to an air pump. During construction, one end of the air charging and discharging pipe connected to the airbag 2 is underwater, and the end connected to the air pump is above the water surface or at an appropriate position underwater.

[0056] To more conveniently, quickly and labor-savingly place the sealing device for box culvert tunnel segments into the box culvert tunnel segment 1 or take it out from the box culvert tunnel segment 1, guide wheels 3 are also arranged circumferentially on the steel structure member 6. When the sealing device for box culvert tunnel segments is placed into the box culvert tunnel segment 1, the guide wheels 3 abut against the inner wall of the box culvert tunnel segment 1, so that the sealing device for box culvert tunnel segments can walk along the inner wall of the box culvert tunnel segment 1 with the help of the guide wheels. Preferably, the distance between each guide wheel 3 is equal.

[0057] Furthermore, the guide wheels 3 are arranged in two groups. The two groups of guide wheels 3 are respectively arranged circumferentially upward around the steel structure member 6, and the airbag 2 is arranged between the two groups of guide wheels 3.

[0058] Optionally, the guide wheels can also be one group or multiple groups. When there is one group of guide wheels 3, they can be arranged side by side with the airbag 2, or the airbag can be arranged in two groups, and the two groups of airbags 2 are located on both sides of the guide wheels 3. The above examples are just several implementation manners of the present invention, and the present invention is not limited to the above several structures.

[0059] The water inlet 7 is located on the main body of the steel structure member 6. The water inlet 7 penetrates through both sides of the steel structure member 6. A water inlet pipe 17 can be connected to the water inlet 7, and a valve is arranged at the water inlet 7. The valve can be a manual valve or an electric valve. In this embodiment, the water inlet 7 is located at the bottom end of the steel structure member 6;

[0060] The exhaust pipe 4 is arranged on the main body of the steel structure member 6 and penetrates through both sides of the steel structure member 6. The number of exhaust pipes 4 is not limited to one. As Figure 6 shown, when two box culvert tunnel pipe joint sealing devices are respectively placed at both ends of the box culvert tunnel pipe joint 1, a sealed space is formed inside the box culvert tunnel pipe joint 1. One end of the exhaust pipe 4 located inside the sealed space of the box culvert tunnel pipe joint 1 is the air inlet end, and the other end is the air outlet end. The pipe orifice of the air inlet end is arranged closely against the inner wall of the box culvert tunnel pipe joint 1. At the same time, the position of the air inlet end of the exhaust pipe 4 can be adjusted according to the installation situation of the box culvert tunnel pipe joint 1 in the installation position to ensure that the air in the sealed space formed inside the box culvert tunnel pipe joint 1 can be discharged to the maximum extent. In this embodiment, it is preferably to arrange the exhaust pipe 4 at the upper end of the main body of the steel structure member 6, and the exhaust pipe 4 and the water inlet 7 are arranged vertically opposite to each other on the steel structure member 6.

[0061] The air outlet end of the exhaust pipe 4 needs to be connected to a trachea to the water surface to achieve exhaust.

[0062] Particularly, the water inlet 7 is not limited to one or two, nor is it limited to a certain fixed pipe diameter size, and its corresponding quantity and pipe diameter can be designed according to the exhaust speed;

[0063] Particularly, since the water inlet is from the bottom of the pipe joint and the exhaust is from the upper part of the pipe joint, there is a longitudinal slope when some pipe joints are installed, resulting in the entire pipe joint being inclined. When the air is not exhausted completely, there will be residual gas in the upper part of the pipe joint. Therefore, it is necessary to arrange the port of the exhaust pipe located inside the pipe joint closely against the inner upper wall of the pipe joint, or the length of the exhaust pipe 4 extending into the pipe joint can be extended, so as to achieve the maximum exhaust effect and reduce the residual gas.

[0064] A further solution is that a sealed space 14 is provided circumferentially inside the steel structure member 6 body, and the inner circumference of the airbag 2 abuts against the sealed space 14; the sealed space 14 is a sealed space composed of steel plates arranged inside the steel structure member, which can generate buoyancy in water. The magnitude of the buoyancy generated by this sealed space 14 is designed through strict stability calculations of weight and buoyancy, so as to basically offset the overall weight of the sealing device in water. In this way, the traction force used when pulling out the pipe section is minimized, and even when a diver dives for operation, it is easy to move the sealing device, thus realizing underwater light operation.

[0065] A further solution is that a channel penetrating both sides of the steel structure member 6 is provided on the steel structure member 6. Preferably, the channel is circular and is located at the center of the steel structure member 6. A hemispherical buffer bladder 8 is provided on one side of the steel structure member 6. The hemispherical buffer bladder 8 is fixed to the steel structure member 6 through a compression flange 9 to seal the channel. Preferably, the hemispherical buffer bladder 8 and the compression flange 9 are fixed through bolts 10. The bladder 8 has strength and elasticity, can buffer the water flow pressure and the pressure change fluctuation of the airbag 2 gas, and realizes the adjustment of the force balance of the pipe section. In particular, this spherical buffer bladder can also be replaced by a steel plate. Preferably, when in use, the protruding part of the hemispherical buffer bladder 8 faces the air side of the culvert tunnel pipe section 1, and the concave surface of the hemispherical buffer bladder 8 faces the outside of the culvert tunnel pipe section 1, that is, the water side after entering the water.

[0066] A further solution is that traction seats 5 are respectively provided on both sides of the steel structure member 6, and connectors are provided on the traction seats 5 to be connected to connecting members. The traction seats 5 are welded to the steel structure member 6, and there are both inside and outside of it. The inside is used for the connection and fixation between the sealing devices, and the outside is used for traction and dragging;

[0067] A further solution is that a traction rope 13 is further included, and the traction rope 13 can be connected to the traction seat 5. Preferably, the connection method is detachable. Specifically, the traction seat 5 and the traction rope 13 are connected through a shackle 12.

[0068] Embodiment 2:

[0069] As Figure 6 shown, this embodiment provides a construction method for a culvert tunnel pipe section, including the culvert tunnel pipe section sealing device described in any one of Embodiment 1. It includes the following steps:

[0070] Step 1: Connect two culvert tunnel pipe section sealing devices using a connecting member 16;

[0071] Step 2: Arrange the connected culvert tunnel pipe section sealing devices at both ends of the culvert tunnel pipe section 1 respectively;

[0072] Step 3: Use the air charging and discharging device 11 to inflate the airbag 2 arranged on the outer periphery of the steel structure member 6 of the box culvert tunnel segment sealing device until both sides of the airbag 2 are completely abutted against the inner wall of the box culvert tunnel segment 1 and the outer periphery of the steel structure member 6, and close the valves of the water inlet 7 and the exhaust pipe 4 arranged on the steel structure member 6 to form a seal at both ends of the box culvert tunnel segment 1;

[0073] Step 4: Transport the box culvert tunnel segment 1 sealed by the box culvert tunnel segment sealing device above the water surface at the installation position to be installed;

[0074] Step 5: Open the valves of the water inlet 7 and the exhaust pipe 4. The sealed space formed by the box culvert tunnel segment 1 and the box culvert tunnel segment sealing device gradually fills with water and exhausts air, the buoyancy decreases, and the segment sinks to the installation position;

[0075] Step 6: Use the air charging and discharging device 11 to deflate the airbag 2, and use the traction device to traction the box culvert tunnel segment sealing device. Under the action of the traction device, the box culvert tunnel segment sealing device slides out of the box culvert tunnel segment 1 by relying on the guide wheels 3 arranged along the circumferential direction of the steel structure member 6.

[0076] Construction process of using the box culvert tunnel segment airbag sealing device:

[0077] Segment manufacturing and acceptance → Install sealing devices on both sides → Connect pipeline valve parts → Inflate the sealing device to achieve sealing → Integrally transport to the semi-submersible ship → Transport to the installation site → The semi-submersible ship dives → The segment floats → The small floating crane ship is in place to assist in hoisting and positioning → Open the water inlet of the sealing device → The sealed cavity fills with water and exhausts air, the buoyancy decreases → The segment dives → The segments are docked and seated on the bottom → The inner cavity of the segment fills with water and exhausts air completely → Deflate the sealing device → Traction the sealing device → Hoist and recover the sealing device → Installation completed.

[0078] Furthermore, a channel penetrating both sides of the steel structure member 6 is provided on the steel structure member 6, and a hemispherical buffer bladder 8 is also provided on one side of the steel structure member 6. The hemispherical buffer bladder 6 is fixed to the steel structure member 6 through a compression flange 9 to seal the channel; when connecting two box culvert tunnel segment sealing devices using the connecting member 16, the sides of the steel structure member 6 with the hemispherical buffer bladder 8 installed are arranged opposite to each other.

[0079] Furthermore, the connecting member 16 is a steel cable 16a or a metal truss 16b.

[0080] Specifically, the box culvert tunnel segment sealing devices are respectively arranged at both ends of the box culvert tunnel segment 1. After achieving sealing, an airtight "chamber" in the middle part is formed, and external water cannot enter the inner cavity of the segment, thereby displacing water to generate buoyancy.

[0081] 1a is the segment to be installed, and 1b is the segment that has been installed

[0082] At both ends of 1a, a set of the sealed device for the box culvert tunnel segment is arranged respectively.

[0083] The air charging and discharging pipes on the sealed devices for the box culvert tunnel segments at both ends of the box culvert tunnel segment 1 are extended to the control equipment on the water surface.

[0084] For the sealed device on the inner side ( Figure 6 the left side), the exhaust pipe and the water inlet are not used, so they should be closed in advance.

[0085] For the sealed device on the outer side ( Figure 6 the right side), the exhaust pipe and the water inlet are used, so the exhaust pipe line should be connected to the water surface in advance for convenient exhaust. At the same time, the valve 15 of the water inlet is opened. Preferably, the valve 15 adopts a solenoid valve, which can realize remote control of the solenoid valve on the water surface to realize automatic opening and closing of the water inlet 7 underwater.

[0086] Furthermore, the two sealed devices are fixed and connected:

[0087] As Figure 6 shown, it is a flexible connection: the steel cable 16a is tightened through the shackles 12 at both ends; the shackles 12 and the towing rope 13 are installed on the towing seat 5 outside the port to realize towing.

[0088] In this way, when the sealed device for the box culvert tunnel segment is unsealed, the sealed device for the box culvert tunnel segment on the towing side can drive the other sealed device for the box culvert tunnel segment to move out along the inner side of the wall of the box culvert tunnel segment 1 at the same time.

[0089] As Figure 7 shown, a further solution is that the connecting member 16 adopts a rigid connection method, specifically connected through the metal truss 16b. When the sealed device is unsealed, the sealed device outside can drive the internal towing device to move out along the inner side of the wall at the same time. The advantage of this method is that the two sealed devices are fixed on both sides by strengthening the truss structure strength, reducing the force on the airbag 2, and the sealing positioning in the box culvert tunnel segment 1 is accurate; it is convenient for hoisting after being pulled out as a whole.

[0090] As Figure 8 shown, because buoyancy is generated in the sealed cavity when every two sealed devices are used in pairs, for relatively long segments, the sealed devices for the box culvert tunnel segments can be used in series. The ballast water is filled into the middle compartment 18 through the water inlet pipe 17, which is beneficial to the stability of the segment and convenient for operations such as transportation, hoisting, and installation.

[0091] As Figure 9 shown, for the composite segment with multiple holes, the parallel connection method is adopted for sealing. Pairs of the sealed devices for the box culvert tunnel segments are placed at the corresponding segment openings for sealing according to actual requirements.

[0092] In summary, the box culvert tunnel segment sealing device and construction method provided by the present invention achieve no water inflow at both ends to generate buoyancy. To facilitate the rapid removal of the device, the seal can be released by deflating on the water surface, and the sealing device can be dragged underwater by a cable to enable the sealing device to slide and move within the segment and more conveniently slide out of the segment. In this way, without the need for divers, after the segment is installed in place once, the sealing device can automatically release the seal, be traction-slid out of the segment, and be hoisted and recovered.

[0093] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A box culvert tunnel segment sealing device for sealing the segment, characterized in that, Including: A steel structure member having a shape identical or similar to the inner cross-sectional shape of the pipe segment; An airbag disposed around the outer periphery of the steel structure member, the airbag being connected to an air charging and discharging device; after inflation, both the inner and outer sides of the airbag abut against the inner wall of the pipe segment and the outer periphery of the steel structure member; Guide wheels arranged on the outer periphery of the steel structure member; A water inlet provided on the steel structure member, the water inlet being provided with a valve; An exhaust pipe passing through both sides of the steel structure member; There is a sealed space along the circumference inside the steel structure member, and the inner circumference of the airbag abuts against the sealed space; A passage passing through both sides of the steel structure member is provided on the steel structure member, and a hemispherical buffer bladder is further provided on one side of the steel structure member, and the hemispherical buffer bladder is fixed to the steel structure member through a compression flange to seal the passage; Traction seats are respectively provided on both sides of the steel structure member.

2. The box culvert tunnel segment sealing device according to claim 1, characterized in that It further includes a towing rope connected to the towing seat.

3. The segment sealing device for box culvert tunnel according to claim 2, wherein The guide wheels are arranged in two groups along the steel structure member, and the airbag is located between the two groups of guide wheels.

4. The box culvert tunnel segment sealing device according to claim 3, characterized in that, The air charging and discharging device is an air charging and discharging pipe.

5. The construction method of the box culvert tunnel segment sealing device according to claim 1, characterized in that, Including the following steps: Step 1: Connect two box culvert tunnel pipe segment sealing devices using a connecting member; Step 2: Respectively arrange the connected box culvert tunnel pipe segment sealing devices at both ends of the pipe segment; Step 3: Use the air charging and discharging device to inflate the airbag disposed around the outer periphery of the steel structure member of the box culvert tunnel pipe segment sealing device until both the inner and outer sides of the airbag completely abut against the inner wall of the pipe segment and the outer periphery of the steel structure member, and close the valves of the water inlet and the exhaust pipe provided on the steel structure member to form a seal at both ends of the pipe segment; Step 4: Transport the pipe segment sealed by the box culvert tunnel pipe segment sealing device above the water surface at the installation position to be installed; Step 5: Open the valves of the water inlet and the exhaust pipe, the sealed space formed by the pipe segment and the box culvert tunnel pipe segment sealing device gradually fills with water and exhausts air, the buoyancy decreases, and the pipe segment sinks to the installation position; Step 6: Use the air charging and discharging device to deflate the airbag, use the traction device to tow the box culvert tunnel pipe segment sealing device, and under the action of the traction device, the box culvert tunnel pipe segment sealing device slides out of the pipe segment by relying on the guide wheels arranged along the circumference of the steel structure member.

6. The construction method of the box culvert tunnel segment sealing device according to claim 5, characterized in that, A passage passing through both sides of the steel structure member is provided on the steel structure member, and a hemispherical buffer bladder is further provided on one side of the steel structure member, and the hemispherical buffer bladder is fixed to the steel structure member through a compression flange to seal the passage; when connecting two box culvert tunnel pipe segment sealing devices using a connecting member, the sides of the steel structure member where the hemispherical buffer bladders are installed are arranged opposite to each other.

7. The construction method of the box culvert tunnel segment sealing device according to claim 5, characterized in that, The connecting member is a steel cable or a metal truss.

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