A device for adjusting the draft of a submerged pipe and a combined submerged barge

Abstract

This utility model relates to the field of immersed tunnel construction technology, and in particular to an immersed tunnel draft adjustment device and a combined immersion barge. The adjustment device includes floating modules symmetrically arranged on both sides of the immersed tunnel; multiple connecting beams are arranged parallel above the immersed tunnel, and each connecting beam is rigidly connected to the floating module at both ends through connectors; the connector includes a cylindrical structure with a built-in jack, and the upper and lower ends of the jack are connected to the floating module and the connecting beam respectively to form a rigid frame. The jack is equipped with a displacement sensor and a control system. The displacement sensor is used to provide real-time feedback of lifting data to the control system. The lifting action of the jack can adjust the relative height of the floating module, thereby controlling the draft of the immersed tunnel and achieving rapid and precise lifting and attitude adjustment; the displacement sensor and the control system work together to automatically control the jack action based on hydrodynamic calculations, resulting in high adjustment accuracy.

Description

Technical Field

[0001] This utility model relates to the field of immersed tunnel construction technology, and in particular to an immersed tunnel draft adjustment device and a combined immersed barge, which is especially suitable for the transportation and installation of immersed tunnels. Background Technology

[0002] During the construction of immersed tunnels, the immersion barge serves as a platform for placement and can utilize its own buoyancy to help adjust the draft of the immersed tunnel or to provide additional floating stability. After the immersed tunnel is connected to the immersion barge, the barge and the immersed tunnel together form a combined structure.

[0003] The existing method of adjusting the load of immersed tubes mainly relies on adjusting the ballast water of the immersed barge to control the draft. This method takes a long time to operate and cannot be frequently adjusted during the floating process, resulting in high requirements for water depth, large amount of channel dredging, and increased construction costs and difficulties.

[0004] Therefore, how to quickly adjust the draft during the floating and transporting of the immersed tube has become an urgent problem to be solved. Utility Model Content

[0005] In order to effectively solve the technical problems in the background art, the main purpose of this utility model is to provide a immersed tube draft adjustment device and a combined immersed barge, which adopts an adjustable immersed tube draft connection device, improves construction flexibility and safety, shortens the load adjustment time, and reduces the requirements for construction environmental conditions.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A device for adjusting the draft of a submerged pipe includes:

[0008] The floating modules are symmetrically arranged on both sides of the immersed tube;

[0009] Multiple connecting beams are arranged in parallel above the immersed tube, and each connecting beam is rigidly connected to the floating module at both ends by connectors.

[0010] The connector includes a cylindrical structure with a built-in jack, the upper and lower ends of which are connected to the float module and the connecting beam to form a rigid frame.

[0011] Before and during the sinking process, the immersed tube is connected to the connecting beam via a detachable vertical connection device; before the sinking begins, the immersed tube is connected to the floating module via a detachable horizontal connection device.

[0012] When adjusting the draft of the immersed tube, the floating module's draft is increased to dmax by synchronously lifting jacks. At this point, the bottom of the immersed tube is flush with the bottom of the floating module, satisfying the following relationship:

[0013] Where B0 is the width of the immersed tube; L0 is the length of the immersed tube; d0 is the initial draft of the immersed tube; B1 is the width of the floating module, L1 is the length of the floating module; and d1 is the initial draft of the floating module.

[0014] Based on the principle of conservation of displacement volume, buoyancy redistribution is achieved by lifting with jacks: the maximum draft d of the floating module. max A dynamic balance is formed with the draft d of the immersed tube. This mechanism can reduce the draft of the immersed tube without changing the total buoyancy, significantly improving the floating and passage of the immersed tube in shallow water areas.

[0015] Furthermore, the jack is equipped with a displacement sensor and a control system, with the displacement sensor used to provide real-time feedback of lifting and lowering data to the control system.

[0016] Furthermore, the floating body module, connecting beam, and connector are modularly assembled through standardized interfaces.

[0017] Furthermore, the jack of the connector is of a hollow structure, which allows anchor rods or steel strands to be inserted through it.

[0018] Furthermore, the jack is a Haili HC / HR / YZH / YZRH / RCH / RRH hollow jack.

[0019] And / or, the jack is a YDC / YCW type tensioning jack.

[0020] Furthermore, the dimensions of the floating module are 60-80m in length, 5-10m in width, and 3-6m in depth.

[0021] The present invention also discloses a combined submerged barge, including the above-mentioned submerged pipe draft adjustment device.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The lifting action of the jacks can adjust the relative height of the floating module, thereby controlling the draft of the submerged tube and achieving rapid and precise lifting and attitude adjustment. The displacement sensor and control system work together to automatically control the jack action based on hydrodynamic calculations, resulting in high adjustment accuracy. Furthermore, the jack control system presets the maximum draft d of the floating module. max Thresholds are set to prevent over-limit operations; the vertical wire rope adopts a graded slow-release lowering technology, which, together with the anchoring system, enables the controlled lowering of the immersed tube and avoids structural impact damage caused by rapid sinking.

[0024] 2. The vertical movement of the immersed tube is controlled by a vertical connection device, which connects the crossbeam and the immersed tube to ensure stability during the sinking process. At the same time, before sinking, the immersed tube and the floating module are connected by horizontally crossed steel wire ropes to limit the horizontal displacement of the floating module. The connector uses a combination of jacks and rigid frames to provide strong support, ensure structural rigidity and stability, and enable the system to have the stability against surges and displacement during the floating process, which is especially suitable for waterway environments with complex water flow.

[0025] 3. The floating body modules, connecting beams and connectors adopt standardized interfaces to achieve modular assembly, which facilitates prefabrication, transportation and on-site assembly, effectively shortening the construction cycle; the size of the floating body modules is adapted to inland waterways, meeting the needs of different scenarios and having strong versatility.

[0026] 4. The jack has automatic control and manual switching functions. During normal construction, the intelligent control system can be used to achieve synchronous or differential adjustment to improve efficiency; in case of emergencies, it can be operated manually to ensure construction safety and progress.

[0027] 5. Various types of jacks can be selected, such as Haili hollow jacks or YDC / YCW tensioning jacks. The latter are equipped with an intelligent tensioning system to achieve fully automatic tensioning and precise parameter control, meeting the customized needs of prestressed construction. Attached Figure Description

[0028] Figure 1 This is a perspective view of the integrated structure of this utility model;

[0029] Figure 2 for Figure 1 Top view;

[0030] Figure 3 A side view of the normal floating state;

[0031] Figure 4 Side view of the draft limit state;

[0032] Figure 5 This is a diagram showing the relationship between the draft of the immersed tube and the lifting distance of the jacks.

[0033] In the diagram: 1. Floating module; 2. Connecting beam; 3. Connector; 4. Jack; 5. Submerged tube; 6. Wire rope. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0035] like Figures 1-5As shown, a submerged tube draft adjustment device includes a float module 1, a connecting beam 2, and a connector 3. The float module 1 is located on both sides of the submerged tube 4, and multiple parallel connecting beams 2 are provided between the float modules 1. Each connecting beam is rigidly connected to the float module at both ends through a retractable connector. Specifically, the connecting beam 2 is located above the submerged tube 4 and is connected to the float modules at both ends of the tube through the connector. Preferably, the float module 1, the connecting beam 2, and the connector 3 all adopt standardized interfaces to achieve modular assembly.

[0036] In addition, the connecting beam 2 and the immersed tube 4 are vertically connected by steel wire rope 5, and the immersed tube is connected to the floating bodies on both sides by horizontally crossed steel wire ropes.

[0037] Preferably, the dimensions of the floating module 1 are 60-80m in length, 5-10m in width, and 3-6m in depth, which are suitable for inland waterway requirements.

[0038] Preferably, the connector 3 includes a cylinder and a jack 31 inside it. The upper and lower ends of the jack are welded to the floating body module and the connecting beam, respectively, to form a rigid frame structure. In use, the relative height of the floating body modules on both sides is adjusted by the lifting action to control the draft of the submerged pipe.

[0039] The jacks 31 have an adjustable lifting rate of 1~5 cm / min, and are connected to displacement sensors and a control system. Multiple jacks can be raised and lowered synchronously or individually controlled manually as needed. The lifting displacement is fed back to the control system in real time via displacement sensors. Combined with hydrodynamic calculations, the required draft adjustment is automatically calculated, and the jacks are controlled to move synchronously or differentially. The jacks are equipped with a self-locking function, which automatically locks when the control system loses power to prevent accidental sinking of the immersed tube or sudden changes in attitude. They also have a manual switching function to quickly adjust the barge's attitude in case of emergencies.

[0040] Preferably, the jack 31 can be a Haili HC / HR / YZH / YZRH / RCH / RRH hollow (through) jack, and the hole in the jack can allow anchor rods, anchor cables, steel strands and shafts to pass through for stretching.

[0041] The preferred jacks are also the YDC / YCW type tensioning jacks; these jacks are equipped with an intelligent tensioning system that allows steel strands and anchor bolts to pass through the tensioning jacks during prestressed construction. Operators can manually control tensioning using an electric hydraulic pump or achieve fully automatic tensioning using intelligent tensioning equipment. Furthermore, the system is intelligently controlled via a computer chip, enabling digital setting and display of pressure, prestress, and stroke parameters. It supports synchronous tensioning, and both prestress and elongation can be dual-controlled to meet customized needs.

[0042] This utility model discloses a combined submerged barge, including the aforementioned submerged pipe draft adjustment device.

[0043] In practical use, the assembly process of a submerged pipe draft adjustment device is as follows:

[0044] The two floating modules 1, connecting beams 2, and connectors 3 can be prefabricated and transported to the site separately. The immersed tube is suspended below the barge by high-strength steel wire ropes. During on-site assembly, the bottom of the jacks is first welded to the floating modules, and then the connecting beams are hoisted to the top of the connectors for welding to form a rigid frame structure. Before and during the sinking process, the connecting beams 2 and the immersed tube 4 are connected by a detachable vertical connection device to control the immersed tube. After the sinking is completed, the vertical connection device is disassembled. Before the sinking begins, the immersed tube and the floating modules are connected by a detachable horizontal connection device to control the horizontal movement of the floating modules.

[0045] In operation, the jacks can be used to press down the floating modules on both sides. The increased pressure on the floating modules leads to a deeper draft and increased displacement, thus altering the overall buoyancy distribution of the submerged barge system. This effectively reduces the draft of the suspended tunnel section, enabling precise lifting and attitude control of the tunnel.

[0046] The process of adjusting the draft of the immersed tube is as follows: When the immersion barge is floated to a shallower area, all the jacks are lifted simultaneously. At this time, the vertical steel wire rope connecting the crossbeam and the immersed tube plays the role of lifting the immersed tube, reducing the draft of the immersed tube and increasing the draft of the floating modules on both sides. However, the floating modules themselves have a shallow draft and will not exceed the draft of the immersed tube. That is, at the draft limit, the floating modules on both sides have the same draft as the immersed tube and are flush with the bottom.

[0047] Immersed tube placement process: Anchor the immersed tube, untie the steel wire ropes that restrict horizontal movement between the floating modules on both sides and the immersed tube, and slowly lower the vertical steel wire rope between the connecting beam and the immersed tube.

[0048] The working principle of this invention, which uses a connector to adjust the draft of the submersible pipe, is as follows:

[0049] Based on the buoyancy and drainage volume balance relationship between the submerged barge and the immersed tube, the following assumptions are made:

[0050] 1) The initial draft of the immersed tube is d0, the width of the immersed tube is B0, and the length is L0;

[0051] 2) The initial draft of each floating module is d1, the width is B1, and the length is L1; under the adjusted draft limit state, the floating modules on both sides have the same draft as the submerged tube, which is d; the maximum draft of the floating module is d. max ;

[0052] If we disregard the discharge of ballast water by the floating modules, the buoyancy of the immersed tube and the floating modules remains constant throughout the process, meaning the total drainage volume remains constant. Adjusting the draft of the immersed tube by using the floating modules on both sides reduces the draft of the immersed tube by increasing the draft of the floating modules. The initial drainage volume formula for the immersed tube and the floating modules is as follows:

[0053] (Formula 1)

[0054] Adjust the discharge volume at the draft limit:

[0055] (Formula 2)

[0056] Since the drainage volume is the same before and after the adjustment, i.e., V0=V, the maximum draft of the floating module is...

[0057] (Formula 3)

[0058] The maximum draft adjustment of the immersed tube is .

[0059] To verify the adjustability of this integrated structure, the following parameters were selected for simplified calculations and examples:

[0060] Assuming the length of the submerged barge and the immersed tube is the same, taken as 100m; the width of the immersed tube is 40m, and the initial draft is 5.00m. Floating pontoons, each 10m wide, are placed on both sides of the submerged barge, with an initial draft of 1.00m. The changes in the draft of the immersed tube are calculated by applying different degrees of jacking (i.e., lifting) to the pontoons, as shown in Table 1.

[0061] Table 1

[0062]

[0063] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for adjusting the draft of a submerged pipe, characterized in that, include: The floating modules are symmetrically arranged on both sides of the immersed tube; Multiple connecting beams are arranged in parallel above the immersed tube, and each connecting beam is rigidly connected to the floating module at both ends through a retractable connector. The connector includes a cylindrical structure with a built-in jack. The upper and lower ends of the jack are connected to the float module and the connecting beam, respectively, to form a rigid frame. The jack is equipped with a displacement sensor and a control system. The displacement sensor is used to provide real-time feedback of lifting data to the control system. Before and during the sinking process, the immersed tube is connected to the connecting beam via a detachable vertical connection device; before the sinking begins, the immersed tube is connected to the floating module via a detachable horizontal connection device. When adjusting the draft of the immersed tube, the buoy module is increased to d using jacks. max At this point, the immersed tube is flush with the bottom of the floating module, satisfying the following relationship: ； Wherein, B0 is the width of the immersed tube; L0 is the length of the immersed tube; d0 is the initial draft of the immersed tube; B1 is the width of the floating module; L1 is the length of the floating module; and d1 is the initial draft of the floating module.

2. The submerged pipe draft adjustment device as described in claim 1, characterized in that: The floating body module, connecting beam, and connector are modularly assembled through standardized interfaces.

3. The immersed tube draft adjustment device as described in claim 1, characterized in that: The connector's jack has a hollow structure, allowing anchor bolts or steel strands to be inserted through it.

4. The submerged pipe draft adjustment device as described in claim 3, characterized in that: The jacks used are Haili HC / HR / YZH / YZRH / RCH / RRH hollow jacks; And / or, the jack is a YDC / YCW type tensioning jack.

5. The submerged pipe draft adjustment device as described in claim 1, characterized in that: The dimensions of the floating module are 60-80m in length, 5-10m in width, and 3-6m in depth.

6. A modular submersible barge, characterized in that: Includes the submerged pipe draft adjustment device as described in any one of claims 1 to 5.

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