Built-in buoyancy tank for immersed tube installation

Abstract

The utility model belongs to the technical field of immersed tube installation, and discloses a built-in buoyancy tank for immersed tube installation. The built-in buoyancy tank for mounting the immersed tube comprises a tank body, a first communicating pipe, a second communicating pipe, a first valve, a second valve and a sole timber. A watertight compartment is arranged in the box body, and the buoyancy of the built-in buoyancy box is adjusted by injecting water into the watertight compartment and draining water out of the watertight compartment. And a sole timber is arranged at the top of the box body and plays a certain role in buffering the contact between the built-in floating box and the inner wall surface of the immersed tube. In the sinking operation process of the large sinking pipe with the two open ends, the built-in buoyancy box for sinking pipe installation can be arranged in a sinking pipe tunnel, the sinking pipe is lifted underwater through buoyancy provided by the built-in buoyancy box for the sinking pipe, the underwater weight of the sinking pipe is equivalently reduced, the difficulty of adjusting the underwater position of the sinking pipe is reduced, and the sinking pipe installation efficiency is improved. And a small-tonnage crane ship can also carry out immersed tube hoisting and sinking operation, so that the engineering cost is saved, and the operation risk is reduced at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of immersed tube installation, in particular to a built-in buoyancy box for immersed tube installation. Background Art

[0002] The immersed tube method, short for prefabricated pipe segment placement, is a construction method for underwater tunnels. Due to breakthroughs in key technologies such as underwater connections, the immersed tube method has become widely adopted and is now the primary method for underwater tunnel construction. Tunnels built using this method are called immersed tube tunnels.

[0003] During underwater submerged tube installation, a crane vessel is required to hoist and lower the tubes, precisely adjusting their placement to avoid collision with surrounding structures. Large, open-ended submerged tubes are heavy underwater, making adjustment difficult. Furthermore, the installation requires a large crane vessel, resulting in high project costs.

[0004] Therefore, there is an urgent need for a safe and simple method to effectively reduce the underwater weight of large immersed tubes, reduce the difficulty of adjusting the underwater position of the immersed tubes, and enable small-tonnage crane vessels to perform lifting and sinking operations. Utility Model Content

[0005] The purpose of the utility model is to provide a built-in buoyancy box for installing a submerged tube, which utilizes the buoyancy provided by the built-in buoyancy box to the submerged tube, thereby equivalently reducing the underwater weight of the large submerged tube.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Internal pontoon for immersed tube installation, including:

[0008] A box body, wherein a watertight compartment is provided in the box body, and a first connecting pipe and a second connecting pipe communicating with the watertight compartment are further provided on the box body;

[0009] a first valve, disposed on the first communicating pipe, for controlling the opening and closing of the first communicating pipe;

[0010] a second valve, disposed on the second communicating pipe, for controlling the opening and closing of the second communicating pipe;

[0011] A block of wood is installed on the top of the box.

[0012] In one embodiment, at least two clamping members are spaced apart on the top of the box body, the block is clamped between two adjacent clamping members, and the height of the block is higher than that of the clamping members.

[0013] In one embodiment, the first connecting pipe is arranged at the first end of the box body, the first end of the second connecting pipe is arranged at the bottom of the box body, the second end of the second connecting pipe extends toward the first end of the box body to protrude from the box body, and the second valve is arranged at the second end of the second connecting pipe.

[0014] In one embodiment, the box further includes a rope fixing structure, and the rope fixing structure is used to fix the traction rope.

[0015] In one embodiment, the rope fixing structure includes a cross-shaped belt pile and ear plates, the cross-shaped belt pile is arranged on the top of the box body, and the height of the cross-shaped belt pile does not exceed the height of the pads, and multiple ear plates are respectively arranged at both ends of the box body along the length direction.

[0016] In one embodiment, a groove is provided on the top of the box body, and the cross-shaped belt pile is arranged in the groove.

[0017] In one embodiment, a reinforcement structure is provided inside the box.

[0018] In one embodiment, the reinforcement structure includes a support beam and reinforcement ribs, the support beam connects two oppositely arranged walls of the box, and multiple support beams are arranged to intersect vertically inside the box, and the reinforcement ribs are arranged on the inner wall of the box.

[0019] In one embodiment, a ladder is provided on the side of the box body, and the ladder extends from the bottom of the box body to the top of the box body.

[0020] In one embodiment, the box body includes a plurality of watertight compartments, and the plurality of watertight compartments are separated by transverse bulkheads.

[0021] Beneficial effects of the utility model:

[0022] The utility model provides a built-in buoyancy box for installing a submerged tube, comprising a box body, a first connecting pipe, a second connecting pipe, a first valve, a second valve, and a skid. A watertight compartment is provided in the box body, the first connecting pipe and the second connecting pipe are respectively connected to the watertight compartment, a first valve is provided on the first connecting pipe to control the opening and closing of the first connecting pipe, and a second valve is provided on the second connecting pipe to control the opening and closing of the second connecting pipe. The first connecting pipe can inject water into the watertight compartment, or it can inject compressed air into the watertight compartment, causing the water in the watertight compartment to be discharged from the second connecting pipe. The built-in buoyancy box adjusts its own buoyancy by injecting and draining water. Skids are provided on the top of the box body to provide a certain buffering effect on the contact between the built-in buoyancy box and the inner wall of the submerged tube. During the sinking operation of a large submerged tube with open ends, the built-in pontoons for installing the submerged tube can be arranged inside the submerged tube tunnel. The buoyancy provided by the built-in pontoons to the submerged tube is used to lift the submerged tube underwater, which effectively reduces the underwater weight of the submerged tube and the difficulty of adjusting the underwater position of the submerged tube. This allows small-tonnage crane vessels to carry out submerged tube lifting and sinking operations, saving engineering costs while reducing operational risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of the internal buoyancy box for installing a submerged tube according to an embodiment of the present utility model;

[0024] Figure 2 This is a top view of the built-in buoyancy box for installing a submerged tube according to an embodiment of the present utility model;

[0025] Figure 3 This is a side view of the internal buoyancy box for installing a submerged tube according to an embodiment of the present utility model;

[0026] Figure 4 This is a cross-sectional view of the internal buoyancy box for installing a submerged tube according to an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the operation process of the built-in pontoon for the installation of the immersed tube according to an embodiment of the present utility model;

[0028] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure at AA.

[0029] In the picture:

[0030] 1. Box body; 11. Watertight bulkhead; 12. Connector; 13. Rope fixing structure; 131. Cross-shaped belt pile; 132. Ear plate; 14. Groove; 2. First connecting pipe; 3. Second connecting pipe; 4. First valve; 5. Second valve; 6. Skid; 7. Reinforcement structure; 71. Support beam; 72. Reinforcement rib; 8. Ladder. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of this utility model, unless otherwise expressly specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, mechanical or electrical connections, direct or indirect connections through an intermediate medium, and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0033] In the description of the present utility model, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0035] like Figures 1-6As shown, the present invention provides an internal buoyancy chamber for installing a submerged tube. The internal buoyancy chamber comprises a chamber 1, a first connecting pipe 2, a second connecting pipe 3, a first valve 4, a second valve 5, and skids 6. The chamber 1 includes at least one watertight compartment 11, with the first and second connecting pipes 2 and 3 respectively communicating with the compartment 11. The first valve 4 is located on the first connecting pipe 2 to control the flow of the first connecting pipe 2; the second valve 5 is located on the second connecting pipe 3 to control the flow of the second connecting pipe 3. A water pump or air pump is connected to the first connecting pipe 2 to inject water or compressed air into the compartment 11. When compressed air is injected into the compartment 11 by the first connecting pipe 2, the water in the compartment 11 is squeezed out by the compressed air and discharged through the second connecting pipe 3. The internal buoyancy chamber adjusts its buoyancy by injecting and draining water from the compartment 11. Skids 6 are located on top of the chamber 1 to provide a buffering effect between the internal buoyancy chamber and the inner wall of the submerged tube. Furthermore, the box body 1 may be a steel shell structure, and the shape of the box body 1 is adapted to the shape of the immersed tube tunnel. For example, the box body 1 is configured to be rectangular or cylindrical.

[0036] For large submerged tubes with open ends, built-in pontoons are placed inside the tube before it is lowered, and the connections between the built-in pontoons and the tube are secured. The specific working process is as follows: the tube is first placed on the deck of a semi-submersible vessel. The semi-submersible vessel slowly descends, and the tube gradually enters the water. When it dives to an appropriate depth, the floating built-in pontoons are dragged into the tunnel of the submerged tube. After the built-in pontoons are arranged inside the tube, the semi-submersible vessel continues to dive, and the weight of the tube is slowly transferred to the hook of the crane ship. After the deck of the semi-submersible vessel is separated from the tube, the semi-submersible vessel is withdrawn, and the subsequent lifting and sinking operations are carried out by the crane ship. According to the floating state of the tube, the buoyancy provided by the built-in pontoons is changed by filling and draining the watertight compartments 11, thereby adjusting the underwater posture of the tube. After the submerged tube is sunk into place and the foundation sand filling is completed, water is injected into the watertight compartment 11 through the first connecting pipe 2 until the built-in buoyancy box is close to a state of gravity and buoyancy balance, and the built-in buoyancy box is withdrawn from the submerged tube. Subsequently, compressed air is injected into the watertight compartment 11 through the first connecting pipe 2 and the water in the watertight compartment 11 is gradually discharged through the second connecting pipe 3 until the built-in buoyancy box floats to the surface. Figure 5 and Figure 6 This is a schematic diagram of the internal pontoon operation process for the immersed tube installation. Figure 5 and Figure 6 The contact and positional relationship between the internal pontoons and the submerged tube can be clearly seen during the operation. The internal pontoons provide buoyancy to the submerged tube, effectively reducing its underwater weight and the difficulty of adjusting its position. This allows even small-tonnage crane vessels to carry out the submerged tube lifting and lowering operation, saving project costs and reducing operational risks.

[0037] Further, if Figure 1 and Figure 2 As shown, at least two clips 12 are provided at intervals on the top of the box body 1. The clips are in the shape of rectangular protrusions. The skid 6 is clipped between two adjacent clips 12 and the height of the skid 6 is higher than that of the clips 12. The skid 6 is clipped between the two clips 12 so that the skid 6 can be more firmly installed on the box body 1. The height of the skid 6 is higher than that of the clips 12 so that the contact between the skid 6 and the inner wall of the immersed tube is not affected by the clips 12, ensuring that the skid 6 can play a buffering role between the built-in buoyancy box and the inner wall of the immersed tube. For example, Figure 2 As shown, the clamping members 12 are arranged in two rows along the top of the box body 1. Accordingly, two rows of skids 6 are also provided to ensure that the skids 6 can fully contact the inner wall of the immersed tube. The number of clamping members 12 can be adjusted according to the size of the box body 1. The size of the skids 6 varies with the distance between adjacent clamping members, and will not be further described here.

[0038] In one embodiment, if Figure 1 As shown, the first connecting pipe 2 is disposed at the first end of the housing 1, and the second connecting pipe 3 is disposed at the bottom of the housing 1. Both the first connecting pipe 2 and the second connecting pipe 3 are in communication with the watertight compartment 11. The second end of the second connecting pipe 3 extends toward the first end of the housing 1 and out of the housing 1. The second valve 5 is disposed at the second end of the second connecting pipe 3, i.e., the second valve 5 and the first connecting pipe 2 are disposed at the same end of the housing 1. Since a diver needs to dive underwater to manually operate the first valve 4 or the second valve 5 when filling the watertight compartment 11 with water, injecting compressed air, or draining water, the above-mentioned structural design allows the diver to dive only to one end of the housing 1 when operating the system, without having to dive to the bottom or the other end of the housing 1. This reduces the distance the diver has to travel, reduces the difficulty of the operation, and improves the safety of the operation. Furthermore, the box body 1 can be divided into multiple watertight compartments 11, and the multiple watertight compartments 11 are separated by transverse bulkheads. After one of the watertight compartments 11 is damaged, the built-in buoyancy tank can still continue to be used. Accordingly, the number of the first connecting pipe 2, the second connecting pipe 3, the first valve 4, and the second valve 5 remains consistent with the number of the watertight compartments 11.

[0039] Preferably, if Figure 1As shown, the box body 1 also includes a rope fixing structure 13 for fixing the traction rope and adjusting the position of the built-in pontoon. Specifically, the rope fixing structure 13 includes a cross-shaped belt grip pile 131 and a lug plate 132. The cross-shaped belt grip pile 131 is set at the top of the box body 1 and is used to pull the built-in pontoon and adjust its position in multiple directions outside the immersed tube. Multiple lug plates 132 are set at both ends of the box body 1 along the length direction to pull and adjust the position of the built-in pontoon inside the immersed tube. The height of the cross-shaped belt grip pile 131 does not exceed the height of the skid 6 to prevent the cross-shaped belt grip pile 131 from contacting the inner wall of the immersed tube and affecting the cushioning effect of the skid 6. Specifically, a groove 14 is opened at the top of the box body 1, and the cross-shaped belt grip pile 131 is set in the groove 14, ensuring that the cross-shaped belt grip pile 131 has sufficient height while avoiding contact between the cross-shaped belt grip pile 131 and the inner wall of the immersed tube.

[0040] In order to improve the overall strength of the built-in buoyancy tank, Figure 4 As shown, a reinforcing structure 7 is provided inside the box body 1, and the reinforcing structure 7 includes a support beam 71 and a reinforcing rib 72, wherein the support beam 71 connects two oppositely arranged walls of the box body 1 to reduce the possibility of the box body 1 being squeezed and deformed. Specifically, a plurality of support beams 71 are arranged to intersect perpendicularly inside the box body 1. For example, when the box body 1 is a rectangular box body, a plurality of support beams 71 respectively connect two oppositely arranged walls of the box body 1 along the length direction, width direction and height direction, and every two support beams 71 intersect perpendicularly with each other. A plurality of reinforcing ribs 72 are arranged at intervals on the inner wall surface of the box body 1 and extend along the length direction of the box body 1 to enhance the structural strength of the side wall of the box body 1. In this embodiment, the support beam 71 is a T-beam structure, and the reinforcing rib 72 is an angle steel. In other embodiments, the support beam 71 and the reinforcing rib 72 can be replaced with other structures with structural reinforcement effects, which will not be repeated here.

[0041] Furthermore, if Figure 3 As shown, an escalator 8 is provided on the side of the box body 1, and the escalator 8 extends from the bottom to the top of the box body 1. The staff can move to the top of the box body 1 through the escalator 8 to connect the traction rope or perform maintenance and repair work on the built-in buoyancy tank.

[0042] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. The built-in buoyancy box for immersed tube installation is characterized by: include: A box body (1), wherein a watertight compartment (11) is provided in the box body (1), and a first connecting pipe (2) and a second connecting pipe (3) communicating with the watertight compartment (11) are further provided on the box body (1); a first valve (4), provided on the first communicating pipe (2), for controlling the opening and closing of the first communicating pipe (2); a second valve (5), provided on the second communicating pipe (3), for controlling the opening and closing of the second communicating pipe (3); A wood block (6) is installed on the top of the box body (1).

2. The internal buoyancy box for immersed tube installation according to claim 1, characterized in that: At least two clamping members (12) are spaced apart on the top of the box body (1), the pad (6) is clamped between two adjacent clamping members (12), and the height of the pad (6) is higher than the height of the clamping members (12).

3. The internal buoyancy box for immersed tube installation according to claim 1, characterized in that: The first connecting pipe (2) is arranged at the first end of the box body (1), the first end of the second connecting pipe (3) is arranged at the bottom of the box body (1), the second end of the second connecting pipe (3) extends toward the first end of the box body (1) to protrude from the box body (1), and the second valve (5) is arranged at the second end of the second connecting pipe (3).

4. The internal buoyancy box for immersed tube installation according to claim 1, characterized in that: The box body (1) further comprises a rope fixing structure (13), and the rope fixing structure (13) is used for fixing the traction rope.

5. The internal buoyancy box for immersed tube installation according to claim 4, characterized in that: The rope fixing structure (13) comprises a cross-shaped belt-carrying pile (131) and an ear plate (132); the cross-shaped belt-carrying pile (131) is arranged on the top of the box body (1), and the height of the cross-shaped belt-carrying pile (131) does not exceed the height of the sleeper (6); and a plurality of ear plates (132) are respectively arranged at both ends of the box body (1) along the length direction.

6. The internal buoyancy box for installing a submerged tube according to claim 5, characterized in that: A groove (14) is provided on the top of the box body (1), and the cross-shaped belt-carrying pile (131) is arranged in the groove (14).

7. The internal buoyancy box for installing a submerged tube according to any one of claims 1 to 6, characterized in that: A reinforcement structure (7) is provided inside the box body (1).

8. The internal buoyancy box for immersed tube installation according to claim 7, characterized in that: The reinforcement structure (7) comprises a support beam (71) and a reinforcement rib (72); the support beam (71) connects two oppositely arranged walls of the box body (1); a plurality of the support beams (71) are arranged to intersect vertically inside the box body (1); and the reinforcement rib (72) is arranged on the inner wall surface of the box body (1).

9. The internal buoyancy box for installing a submerged tube according to any one of claims 1 to 6, characterized in that: An escalator (8) is provided on the side of the box body (1), and the escalator (8) extends from the bottom of the box body (1) to the top of the box body (1).

10. The internal buoyancy box for installing a submerged tube according to any one of claims 1 to 6, characterized in that: The box body (1) comprises a plurality of watertight compartments (11), and the plurality of watertight compartments (11) are separated by transverse bulkheads.

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