Construction structure and construction method of underwater circular pipe

Abstract

The present invention relates to the field of building construction technology, and specifically refers to an underwater circular pipe construction structure and construction method. It includes a construction platform, a foundation trench excavation device, a stone throwing and leveling device, a backfilling device, a stone storage device, a circular pipe hoisting device, and a docking device; the foundation trench excavation device can be moved longitudinally and arranged at the longitudinal front end of the construction platform; the stone throwing and leveling device can be moved longitudinally and transversely on the construction platform; the backfilling device is arranged on the construction platform and is located longitudinally behind the stone throwing and leveling device; the stone storage device is arranged on the side of the construction platform for storing stones and transporting stones to the stone throwing and leveling device and the backfilling device; the circular pipe hoisting device can be moved longitudinally and arranged at the longitudinal rear end of the construction platform; the docking device is arranged on the circular pipe for assembling and docking adjacent circular pipes. The construction structure of the present application integrates multiple functions such as foundation trench excavation, stone throwing and leveling of the base bed, circular pipe installation, foundation trench backfilling, and construction control.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to an underwater circular pipe construction structure and a construction method. Background Art

[0002] The construction of circular pipelines on water includes multiple steps, including trench excavation, stone dumping, bed leveling, circular pipeline installation, and stone backfill. Stone dumping in trenches is often done using grab buckets, excavators, and wire mesh bags, resulting in high stone loss and low precision. Bed leveling is often done manually using the "guide rail scraper method," which involves extensive diving operations, high safety risks, and low construction efficiency. Circular pipeline installation often utilizes a conventional method using a floating crane combined with divers. Floating cranes are floating operations, susceptible to waves, currents, and other factors, limiting construction accuracy. Especially in poor wave conditions, these operations often require rushing to meet deadlines, severely impacting construction efficiency. Manual winches and other devices are often used to pull and close pipe joints, requiring extensive underwater labor and slowing construction speeds. Each of these steps requires at least one type of equipment, involving numerous types and quantities, and low levels of integration and intelligence.

[0003] Therefore, the construction of circular pipelines on water mainly has the following shortcomings:

[0004] 1. Conventional methods such as grab buckets, excavators, and wire mesh bags have low stone throwing accuracy, large stone loss, and difficult to control elevation;

[0005] 2. Manual leveling of the base bed requires a large amount of diving work, high safety risks and low construction efficiency;

[0006] 3. The installation method using floating crane + diver has low precision. When the wave and water flow conditions are poor, the work needs to be done in a rush, which limits the construction time.

[0007] 4. Hand winches and other devices are often used to connect and close pipe joints, which requires a lot of manual labor and slows the construction speed.

[0008] 5. The overall construction involves a lot of equipment, but the equipment integration and intelligence are low. Summary of the Invention

[0009] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and provide an underwater circular pipe construction structure and construction method.

[0010] The technical solution of the present invention is: an underwater circular pipeline construction structure, comprising:

[0011] A construction platform, wherein a plurality of groups of liftable pile legs are provided on the construction platform;

[0012] A foundation trench excavation device, the foundation trench excavation device being movable in the longitudinal direction and arranged at the longitudinal front end of the construction platform;

[0013] A riprap and leveling device, which can be moved longitudinally and transversely on the construction platform and is used for riprap and leveling operations;

[0014] A backfilling device is arranged on the construction platform and is located longitudinally behind the riprap and leveling device, and is used to backfill the foundation trench where the pipeline has been laid;

[0015] A stone storage device is provided on the side of the construction platform for storing stones and transporting the stones to the riprap and leveling device and the backfill device;

[0016] A round pipe lifting device, which is movable in the longitudinal direction and is arranged at the longitudinal rear end of the construction platform;

[0017] The docking device is arranged on the circular tube and is used to assemble and dock the circular tube to be assembled that is lowered into the base groove with the assembled circular tube.

[0018] According to an underwater circular pipe construction structure provided by the present application, the docking device includes:

[0019] A first clamp, which is a clamping structure for clamping and fixing the outer side of the assembled circular tube;

[0020] A second clamp, the second clamp being a clamping structure clamped and fixed on the outside of the circular tube to be assembled;

[0021] A pulling and closing jack, one end of which is fixed on the second fixture and the other end is fixed on the first fixture, is used for shrinking in the longitudinal direction to dock the two groups of round tube ports.

[0022] According to an underwater circular pipe construction structure provided by the present application, the docking device also includes a guide rod; one end of the guide rod is fixed on a second clamp of the circular pipe to be assembled, and the other end extends axially along the pipe, and the other end of the guide rod is inserted into the guide groove on the first clamp of the assembled circular pipe when two groups of adjacent circular pipes are docked.

[0023] According to an underwater circular pipe construction structure provided by the present application, a plurality of pulling and closing jacks and a plurality of guide rods are arranged on the second clamp, and the plurality of pulling and closing jacks and the plurality of guide rods are alternately arranged in sequence along the circumferential direction of the second clamp.

[0024] According to an underwater circular pipe construction structure provided by the present application, the docking device also includes a docking joint; the docking joint is an annular structure installed at the longitudinal front end of the circular pipe, one end of the docking joint is sleeved on the outside of the end of the circular pipe, and the other end is sleeved on the longitudinal rear end of the other adjacent circular pipe after the adjacent circular pipes are docked; a guide tongue is provided at the bottom of the longitudinal front end of the docking joint; the guide tongue is an arc-shaped sheet structure with a small longitudinal front end and a large longitudinal rear end.

[0025] According to an underwater circular pipeline construction structure provided by the present application, the riprap and leveling device includes:

[0026] A transverse track, both ends of which are connected to the construction platform in a longitudinally movable manner;

[0027] The first chute is a telescopically adjustable hollow pipe structure. The upper end of the first chute can be moved laterally and connected to the transverse track, and the lower end is provided with a leveling head for scraping the base trench stones.

[0028] According to an underwater circular pipe construction structure provided by the present application, the stone storage device includes a riprap storage bin and a backfill storage bin; the riprap storage bin and the backfill storage bin are respectively placed on both lateral sides of the construction platform.

[0029] A method for constructing an underwater circular pipeline is provided. The method is based on the above-mentioned construction structure and is carried out according to the following steps:

[0030] S1. Drag the construction platform to the construction area and lower the pile legs to secure the construction platform.

[0031] S2. Excavating a foundation trench in the construction water area using a foundation trench excavation device;

[0032] S3, the material transport ship is moored at the lateral side of the construction platform to transport stones into the stone storage device;

[0033] S4, adjusting the unloading position of the stone riprap and leveling device, transferring the stones in the stone storage device to the stone riprap and leveling device to rip and level the excavated foundation trench;

[0034] S5. The round pipe hoisting device hoists the round pipe to be assembled into the foundation trench that has been riprap-leveled. The diver dives and uses the docking device to dock the round pipe to be assembled with the assembled round pipe.

[0035] S6, the backfill device performs stone riprap backfill on the assembled circular pipe;

[0036] S7. Continue in sequence until all the round pipes at the current workstation are assembled, then drag the construction platform to the next construction area and continue in accordance with the above steps until all the round pipes are assembled.

[0037] According to a method for constructing an underwater circular pipe provided by the present application, in step S5, the method in which a diver dives and uses a docking device to dock the circular pipe to be assembled with the assembled circular pipe includes: arranging a first clamp and a second clamp on the outside of the circular pipe to be assembled, the circular pipe lifting device uses the first clamp and the second clamp to lower the circular pipe to be assembled, so that the circular pipe to be assembled and the assembled circular pipe are initially docked, the diver enters the water and connects the pulling jack on the second clamp of the circular pipe to be assembled with the first clamp of the assembled circular pipe, and tensions the circular pipe to be assembled by the pulling jack, so that the circular pipe to be assembled and the assembled circular pipe are docked.

[0038] According to a method for constructing underwater circular pipes provided by the present application, a circular pipe lifting device uses a first clamp and a second clamp to lower the circular pipe to be assembled, aligns the longitudinal rear end of the circular pipe to be assembled with the butt joint of the longitudinal front end of the assembled circular pipe, and places the end of the circular pipe to be assembled on the guide tongue at the front end of the butt joint. At the same time, the end of the guide rod on the second clamp of the circular pipe to be assembled passes through the guide groove on the first clamp of the assembled circular pipe, thereby completing the preliminary docking of adjacent circular pipes.

[0039] The advantages of this application are as follows: 1. The construction structure of this application integrates multiple device structures such as foundation trench excavation, stone riprap and leveling, backfilling, and hoisting on the construction platform. These device structures can complete all the processes of underwater installation of circular pipes except docking on the construction platform without introducing other large equipment and tools. The specific docking can be easily completed through the docking device on the circular pipe. The efficiency of the entire circular pipe construction is extremely high, the safety risk is low, the impact of wind, waves, and water currents is extremely small, the docking construction requires very few people, and the construction platform has a high degree of integration and intelligence.

[0040] 2. The docking device of the present application includes a first clamp and a second clamp. The first clamp and the second clamp are themselves the equipment required for hoisting the round pipe. By installing a pulling and closing jack on the second clamp, the round pipe to be assembled is stretched and contracted by the pulling and closing jack, so that the round pipe to be assembled can be conveniently docked with the assembled round pipe. The docking method is simple, the docking precision is high, the number of diving construction personnel required is small, and the safety is high.

[0041] 3. The present application sets a guide rod between the second clamp and the first clamp, and uses the guide rod to guide the movement of the circular tube to be assembled, so that the circular tube to be assembled can be accurately moved to the end of the assembled circular tube, completing the precise alignment connection. The construction accuracy is extremely high, and the construction efficiency is also greatly improved, without the need for correction and adjustment processes;

[0042] 4. The present application sets multiple pulling and closing jacks and multiple guide rods on the second fixture, and arranges them alternately along the circumferential direction. This arrangement makes the force application more stable during the pulling and closing process, and the longitudinal movement of the assembled round tube is more precise without deviation, making the docking smoother.

[0043] 5. This application sets a butt joint at the front end of the round tube, and uses the guide tongue on the butt joint to guide the assembled round tubes, which facilitates the butt joint of the two sets of round tubes. The butt joint itself can be sleeved at the interface, and the stability of the butt joint is guaranteed, which greatly improves the accuracy and efficiency of the butt joint.

[0044] 6. The riprap and leveling device of the present application has a simple structure. The transverse track allows the first chute to be easily moved longitudinally and transversely within the moon pool, so that the riprap of the first chute can be precisely adjusted. The first chute can be telescopically adjusted to adapt to different depths, and the leveling head at the lower end of the first chute can scrape and level the riprap during movement. The operation is simple and the use is extremely convenient.

[0045] 7. This application divides the stone storage bin into a riprap storage bin and a backfill storage bin. The riprap storage bin supplies stones to the riprap leveling device, and the backfill storage bin supplies stones to the backfill device. The riprap storage bin and the backfill storage bin are placed on both sides of the construction platform without interfering with each other, and the efficiency of stone transportation is extremely high.

[0046] 8. The construction method of this application is extremely simple. It can carry out the processes of foundation trench excavation, stone riprap and leveling, installation, backfilling, and hoisting based on the construction platform. It has a high degree of integration and intelligence, replacing the traditional mode of collaborative operation of multiple ship machinery and equipment. The round pipe docking process is extremely simple, the entire construction process is highly efficient, and safety has been greatly improved. It is minimally affected by wind, waves, and water currents, and has great promotion value.

[0047] 9. The method for butt-jointing the ends of circular pipes in this application is extremely simple. The butt-jointing of the ends of the circular pipes underwater can be completed by pulling and closing the jacks on the first and second clamps. No large-scale tensioning equipment is required. The number of people required for underwater construction is small, the underwater operation time is shortened, the risk of underwater operation is extremely low, and the construction efficiency is high.

[0048] 10. This application first performs preliminary docking on the circular tubes to be assembled before docking them. By setting the guide rod and the guide tongue, the circular tubes to be assembled can be conveniently docked to the ends of the assembled circular tubes. The subsequent pulling jack can conveniently pull and dock the adjacent circular tubes together.

[0049] The construction structure of this application integrates multiple functions such as foundation pit excavation, base bed stone throwing and leveling, circular pipe installation, foundation pit backfilling and construction control. It has a very high degree of integration and intelligence, high construction accuracy and efficiency, and extremely low construction risk, and has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 : A top view of the construction structure of the present invention;

[0051] Figure 2 : A side view of the construction structure of the present invention;

[0052] Figure 3 : Side view of the docking structure of the present invention (preliminary docking);

[0053] Figure 4 : A top view of the docking structure of the present invention (preliminary docking);

[0054] Figure 5 : A top view of the docking structure of the present invention (completely docked);

[0055] Among them: 1—construction platform; 2—pile leg; 3—first clamp; 4—second clamp; 5—pull-and-close jack; 6—guide rod; 7—butt joint; 8—guide tongue; 9—longitudinal track; 10—transverse track; 11—moon pool; 12—first chute; 13—riprap storage bin; 14—backfill storage bin; 15—bucket; 16—second chute; 17—hoisting equipment. DETAILED DESCRIPTION

[0056] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention.

[0057] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0059] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] The present application relates to an underwater circular pipe construction structure, which is used for excavating foundation trenches, riprap and leveling, lowering pipes, connecting pipes, and backfilling foundation trenches in construction waters. The present application concentrates all the processes of underwater circular pipe construction on a construction platform, solving the problems of coordination difficulties, high construction difficulty, and high risk in the existing technology that requires multiple large-scale water equipment to cooperate with each other for underwater circular pipe construction. The construction structure of the present application that integrates all the processes has high construction efficiency, high construction precision, and low construction risk. Moreover, by concentrating all the processes on the construction platform, all the processes can be carried out in an orderly manner, with better coordination and a high degree of intelligent control. The number of underwater construction personnel is greatly reduced, the operation time of underwater construction is greatly shortened, and the risk of underwater operations is extremely small.

[0061] Specifically, such as Figures 1 to 5 As shown, the construction structure of the present application includes a construction platform 1, a foundation trench excavation device, a stone throwing and leveling device, a backfilling device, a stone storage device, a circular pipe lifting device and a docking device, wherein the construction platform 1 is the main part of the entire construction structure, and a moon pool 11 is provided in the middle of the construction platform 1 to facilitate stone throwing and leveling operations. The construction platform 1 of this embodiment is a square structure (not limited to a square structure in actual application), and retractable pile legs 2 are provided at the four corners of the construction platform 1. The construction platform 1 is supported in the construction water area by the pile legs 2. The pile legs 2 can be raised and lowered to adapt to different water depths, thereby stably fixing the construction platform 1 in the construction water area. After the circular pipe construction in the water area where the construction platform 1 is located is completed, the pile legs 2 can be retracted, and the construction platform 1 can be towed to the next construction location by a tugboat.

[0062] The foundation trench excavation device is arranged at the longitudinal front end of the construction platform 1 and can be moved longitudinally. The foundation trench excavation device includes a bucket 15. The bucket 15 can be adjusted in the longitudinal and transverse directions on the construction platform 1 (the longitudinal direction in this application refers to the longitudinal direction of the construction platform 1). Figure 1 The left and right directions in Figure 1 The vertical direction refers to the up and down direction Figure 1 After bucket 15 is lowered to the bottom of the construction water area, foundation trench can be excavated. Foundation trench is excavated longitudinally, i.e., in the construction direction. Bucket 15 is located in front of construction platform 1, which is actually in the front of the construction direction.

[0063] The riprap and leveling device is arranged on construction platform 1 and can be moved longitudinally and transversely. It is used to dump rocks into the foundation trench and level the resulting bed. The riprap and leveling device constructs a foundation for lowering circular pipes, facilitating their installation by forming a flat bed within the foundation trench. The riprap and leveling device is located longitudinally behind the foundation trench excavation device. That is, while the foundation trench excavation device excavates the foundation trench in front, the riprap and leveling device performs riprap and leveling on the excavated foundation trench behind.

[0064] The round pipe lifting device can be moved longitudinally and is set at the longitudinal rear end of the construction platform 1. The round pipe lifting device lowers the round pipe to be assembled onto the flat base bed. The round pipe lifting device is set at the longitudinal rear end of the construction platform 1 and can adjust the longitudinal and lateral displacement to facilitate the accurate lowering of the round pipe to be assembled onto the base bed.

[0065] The docking device is installed on the circular pipe and is used to assemble and dock the circular pipe to be assembled with the already assembled circular pipe in the base trench. Divers use the docking device to accurately align the circular pipe to be assembled with the already assembled circular pipe, completing the splicing process of the adjacent circular pipes. During the entire construction process, only the docking process requires divers to work underwater.

[0066] After the circular pipes are docked, the trench where the circular pipes are located needs to be backfilled. The backfilling device is arranged on the construction platform 1 and is located longitudinally behind the riprap and leveling device. It is used to backfill the trench where the pipes have been laid. The backfilling device is located between the riprap and leveling device and the circular pipe lifting device.

[0067] The present application involves two stone throwing processes during the entire construction process: one is the stone throwing in the foundation trench to form the base bed, and the other is the backfilling of the foundation trench. In these two processes, the stones in the storage bin on the construction platform 1 need to be transported to the foundation trench. The present application uses a stone storage device for stone supply. The stone storage device is set on the side of the construction platform 1 to store stones and transport the stones to the stone throwing and leveling device and the backfilling device. The stones in the stone storage device are transported by a material transport ship. The stone storage device is located on the lateral side of the construction platform 1, and the transportation of stones will not interfere with the construction of the round pipe.

[0068] The specific construction is carried out according to the following steps:

[0069] S1, drag the construction platform 1 to the construction water area, lower the pile legs 2 to fix the construction platform 1;

[0070] S2. Excavating a foundation trench in the construction water area using a foundation trench excavation device;

[0071] S3, the material transport ship is moored at the lateral side of the construction platform 1 to transport stones into the stone storage device;

[0072] S4, adjusting the unloading position of the stone riprap and leveling device, transferring the stones in the stone storage device to the stone riprap and leveling device to rip and level the excavated foundation trench;

[0073] S5. The round pipe hoisting device hoists the round pipe to be assembled into the foundation trench that has been riprap-leveled. The diver dives and uses the docking device to dock the round pipe to be assembled with the assembled round pipe.

[0074] S6, the backfill device performs stone riprap backfill on the assembled circular pipe;

[0075] S7. Continue in sequence until all the round pipes at the current workstation are assembled, then drag the construction platform 1 to the next construction area and continue in accordance with the above steps until all the round pipes are assembled.

[0076] That is, the construction process of this application is: the foundation trench excavation device at the front end of the construction platform 1 excavates the foundation trench, the stone throwing and leveling device behind the foundation trench excavation device throws stones into the excavated foundation trench to level the base bed, the round pipe lifting device lifts the round pipe to be assembled and lowers it onto the leveled base bed, the docking device docks the round pipe to be assembled with the assembled round pipe, and the backfilling device backfills the foundation trench where the assembled round pipe is located. The entire construction process is extremely smooth and orderly. Taking into account the sequential progress of the construction processes, this application makes targeted designs for the orientations between the various devices to avoid interference between processes and improve construction efficiency.

[0077] The present application lowers the circular tube into the base trench, which can be a single circular tube lowered into the base trench, which is then joined together in the longitudinal direction to form a single longitudinal pipe structure, or multiple circular tubes can be lowered into the base trench, which are arranged in parallel in the transverse direction, and multiple circular tubes in the longitudinal direction are joined together to form an integral pipe, and finally multiple independent longitudinal pipes are formed in the base trench.

[0078] In some embodiments of the present application, the above-mentioned docking device is optimized. Specifically, Figures 3-5 As shown, the docking device includes a first clamp 3, a second clamp 4 and a pulling jack 5. The first clamp 3 and the second clamp 4 are hoist-type clamp structures arranged at intervals along the axial direction on the outside of the round tube. The first clamp 3 and the second clamp 4 are part of the round tube lifting structure. Before lifting, the first clamp 3 and the second clamp 4 are first fixed to the outside of the round tube to be assembled, and then connected to the round tube lifting device through a lifting rope. The round tube lifting device lifts the round tube to be assembled onto the base bed. During the actual docking assembly, the first clamp 3 remains on the outside of the assembled round tube, and the first clamp 3 and the second clamp 4 remain on the outside of the round tube to be assembled. After the docking assembly is completed, the second clamp 4 on the round tube to be assembled and the first clamp 3 on the outside of the assembled round tube can be removed.

[0079] One end of the pull-and-close jack 5 is fixed to the second clamp 4, and the other end is fixed to the first clamp 3. It is used to retract longitudinally to mate the two sets of circular tube ends. The pull-and-close jack 5 is installed on the second clamp 4. After the circular tubes to be assembled are lowered into place, the pull-and-close jack 5 follows the second clamp 4 into the water. The diver then securely connects the other end of the pull-and-close jack 5 to the first clamp 3 on the assembled circular tubes, and then activates the pull-and-close jack 5 to tension the joint.

[0080] The specific docking process is as follows: a first clamp 3 and a second clamp 4 are arranged on the outside of the circular tube to be assembled; the circular tube lifting device uses the first clamp 3 and the second clamp 4 to lower the circular tube to be assembled, so that the circular tube to be assembled and the assembled circular tube are initially docked; the diver enters the water and connects the pulling jack 5 on the second clamp 4 of the circular tube to be assembled with the first clamp 3 of the assembled circular tube; the circular tube to be assembled is tensioned by the pulling jack 5, so that the circular tube to be assembled and the assembled circular tube are docked.

[0081] The connection between the pulling jack 5 and the first clamp 3 on the assembled round pipe can be Figures 3-5 As shown in the figure, the free end of the pull-together jack 5 is provided with a hook, which is hooked onto the fixing buckle on the first clamp 3 on the assembled circular tube to complete the connection of the pull-together jack 5. After the end of the circular tube to be assembled is connected to the end of the assembled circular tube, the pull-together jack 5 can be removed from the first clamp 3 of the assembled circular tube, or the second clamp 4 on the outer side of the circular tube to be assembled and the first clamp 3 of the assembled circular tube can be removed simultaneously, and then used for clamping and installing the next section of circular tube.

[0082] In order to make the force applied by the pulling and closing jacks 5 smoother and more stable and avoid deviations in non-longitudinal directions, in this embodiment, multiple pulling and closing jacks 5 and multiple guide rods 6 are arranged on the second clamp 4, and the multiple pulling and closing jacks 5 and multiple guide rods 6 are arranged alternately in sequence along the circumferential direction of the second clamp 4.

[0083] In a further embodiment of the present application, a guide structure is provided during the round tube docking process, such as Figures 3-5 As shown, the docking device also includes a guide rod 6, one end of which is fixed to the second fixture 4 of the circular tube to be assembled, and the other end of which extends axially along the tube. When two sets of adjacent circular tubes are docked, the other end of the guide rod 6 is inserted into the guide groove of the first fixture of the already assembled circular tube. The coordinated structure of the guide rod 6 and the guide groove can limit the relative displacement of the second fixture 4 of the circular tube to be assembled and the first fixture 3 of the already assembled circular tube in the non-axial direction, allowing the circular tube to be assembled to move axially, thereby significantly improving docking accuracy.

[0084] In addition, this embodiment also provides another guide structure at the end of the round tube, such as Figures 3-5 As shown, the docking device also includes a docking joint 7, which is an annular structure installed at the longitudinal front end of the circular tube. One end of the docking joint 7 is sleeved on the outside of the end of the circular tube, and the other end is sleeved on the longitudinal rear end of the other adjacent circular tube after the adjacent circular tubes are docked. A guide tongue 8 is provided at the bottom of the longitudinal front end of the docking joint 7. The guide tongue 8 is an arc-shaped sheet structure with a small longitudinal front end and a large longitudinal rear end.

[0085] After the adjacent circular tubes are butt-jointed, the butt joint 7 is a ring-shaped structure that is sleeved on the interface position. The butt joint 7 itself has a guiding function. The exception guide tongue 8 can further limit the non-axial relative displacement between the circular tube to be assembled and the assembled circular tube, making it convenient for the circular tube to be assembled to be accurately butted to the end of the assembled circular tube.

[0086] The specific construction process is as follows: the pipe hoisting device uses the first clamp 3 and the second clamp 4 to lower the pipe to be assembled, aligning the longitudinal rear end of the pipe to be assembled with the longitudinal front end of the pipe already assembled, so that the end of the pipe to be assembled rests on the guide tongue 8 at the front end of the pipe already assembled, and at the same time, the end of the guide rod 6 on the second clamp 4 of the pipe to be assembled passes through the guide groove on the first clamp 3 of the pipe already assembled, completing the preliminary docking of the adjacent pipes. After the preliminary docking, a gap is left between the pipe to be assembled and the already assembled pipe, and then the tensioning jack 5 is used to tension and contract to complete the docking of the pipe to be assembled and the ends of the already assembled pipe.

[0087] In some embodiments of the present application, the present embodiment optimizes the above-mentioned riprap leveling device, specifically, Figures 1-2 As shown, the riprap and leveling device has a transverse track 10 and a first chute 12. Trolleys are provided at both ends of the transverse track 10. The transverse ends of the transverse track 10 can be moved longitudinally on the construction platform 1 through the trolleys (this movement can be driven by a cylinder, a motor, or a traction and tensioning drive, as long as relative movement can be achieved).

[0088] The first chute 12 is a telescopically adjustable hollow pipe structure. It includes a fixed upper end and a movable lower end. The upper end of the fixed upper end is laterally movable and connected to the transverse track 10. The upper end of the movable upper end is vertically movable and sleeved on the lower end of the fixed upper end. The length of the entire first chute 12 can be adjusted by adjusting the length of the movable upper end extending into the lower end of the fixed upper end. The position of the movable lower end for unloading materials can be adjusted by adjusting the position of the transverse track 10 along the longitudinal track 9 and the position of the upper end of the fixed upper end on the transverse track 10. The first chute 12 of this embodiment is located within the moon pool 11 and can be freely moved within the moon pool 11. After the riprap and leveling work in the construction area is completed, the position of the first chute 12 can be adjusted to a corner of the moon pool 11 to avoid affecting subsequent construction.

[0089] The lower end of the first chute 12 is provided with a leveling head for scraping the stones in the base trench. In fact, a leveling head is provided at the lower end of the movable cylinder. The leveling head moves in the base trench with the first chute 12, scraping the riprap in the base trench to form a flat base bed.

[0090] In some other embodiments of the present application, the present embodiment optimizes the above-mentioned stone storage device. Specifically, Figures 1-2As shown, the stone storage device includes a riprap storage bin 13 and a backfill storage bin 14 , and the riprap storage bin 13 and the backfill storage bin 14 are respectively placed on both sides of the construction platform 1 .

[0091] The riprap storage bin 13 corresponds to the riprap leveling device and supplies stones to the riprap leveling device through a belt structure. The backfill storage bin 14 corresponds to the backfill device and supplies stones to the backfill device through a belt structure.

[0092] The riprap storage bin 13 and the backfill storage bin 14 are both storage structures with a larger top and a smaller bottom. The material transport ship is moored at the lateral side of the construction platform 1, and the stones are transported to the corresponding riprap storage bin 13 and backfill storage bin 14 through a belt structure. The riprap storage bin 13 and the backfill storage bin 14 are placed on both lateral sides of the construction platform 1, and the transportation of stones will not interfere with the progress of other processes.

[0093] In a further embodiment of the present application, the above-mentioned backfilling device is optimized. Figures 1-2 As shown, the backfilling device of this embodiment includes a plurality of second chutes 16 arranged at intervals along the transverse direction. The second chutes 16 are located longitudinally rearward of the moon pool 11. The upper end of the second chute 16 is connected to the construction platform 1, and the lower end is retractable. The second chute 16 can adjust the direction and angle of material discharge to facilitate all-round backfilling operations on the foundation pit.

[0094] In some embodiments of the present application, the above-mentioned foundation trench excavation device and round pipe hoisting device are optimized. Figures 1-2 As shown, in this embodiment, two longitudinal tracks 9 are provided on the construction platform 1. The two longitudinal tracks 9 are suspended above the construction platform 1 and are located on either side of the moon pool 11 in the center of the construction platform 1. The longitudinal ends of the longitudinal tracks 9 extend beyond the construction platform 1. The longitudinal section of the longitudinal tracks 9 located in the longitudinal front of the construction platform 1 is installed with a foundation trench excavation device, while the longitudinal section of the longitudinal tracks 9 located in the longitudinal rear of the construction platform 1 is installed with a round pipe lifting device.

[0095] The trench excavation device includes an excavation track located at the front end of the longitudinal track 9. The excavation track is arranged in a transverse direction, and a bucket 15 is arranged on the excavation track so as to be laterally movable. The longitudinal movement of the excavation track on the longitudinal track 9 and the transverse movement of the bucket 15 on the excavation track allow the bucket 15 to adjust the excavation position.

[0096] The round tube lifting device includes a lifting track provided at the rear end of the longitudinal track 9. In this embodiment, there are two lifting tracks, each of which is movably connected to the longitudinal track. Each set of lifting tracks is equipped with a lifting device 17 that can move laterally. The longitudinal movement of the lifting track on the longitudinal track 9 and the lateral movement of the lifting device 17 on the lifting track facilitate the adjustment of the lifting position of the lifting device 17.

[0097] In this embodiment, a support frame is provided at the longitudinal rear end of the construction platform 1, such as Figure 2 As shown, the support frame is located below the longitudinal track 9 and is used to store round tubes. When the round tubes need to be hoisted, the hoisting equipment 17 on the longitudinal track 9 can be used to hoist the round tubes. The two sets of hoisting equipment 17 cooperate with each other to hoist the round tubes.

[0098] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for constructing a circular underwater pipeline, characterized by: The construction is carried out using an underwater circular pipe construction structure; the construction structure comprises: A construction platform (1), wherein the construction platform (1) is provided with a plurality of groups of pile legs (2) capable of being raised and lowered; A foundation trench excavation device, the foundation trench excavation device being movable in the longitudinal direction and being arranged at the longitudinal front end of the construction platform (1); A riprap and leveling device, which is arranged on a construction platform (1) and can be moved longitudinally and transversely, and is used for riprap and leveling operations; A backfilling device is arranged on the construction platform (1), and is located longitudinally behind the riprap and leveling device, and is used to backfill the foundation trench where the pipeline has been laid; A stone storage device, the stone storage device being arranged on the side of the construction platform (1) for storing stones and transporting the stones to the riprap and leveling device and the backfill device; A round pipe lifting device, the round pipe lifting device being movable in the longitudinal direction and being arranged at the longitudinal rear end of the construction platform (1); A docking device is provided on the round tube and is used to assemble and dock the round tube to be assembled placed in the base groove with the assembled round tube; The construction method is carried out according to the following steps: S1, dragging the construction platform (1) to the construction water area, lowering the pile legs (2) to fix the construction platform (1); S2. Excavating a foundation trench in the construction water area using a foundation trench excavation device; S3, the material transport ship is moored at the lateral side of the construction platform (1) to transport the stone into the stone storage device; S4, adjusting the unloading position of the stone riprap and leveling device, transferring the stones in the stone storage device to the stone riprap and leveling device to rip and level the excavated foundation trench; S5. The round pipe hoisting device hoists the round pipe to be assembled into the foundation trench that has been riprap-leveled. The diver dives and uses the docking device to dock the round pipe to be assembled with the assembled round pipe. S6, the backfill device performs stone riprap backfill on the assembled circular pipe; S7, proceed in sequence until all the round pipes at the current workstation are assembled, then drag the construction platform (1) to the next construction area and proceed according to the above steps until the construction of all the round pipes is completed.

2. A method for constructing an underwater circular pipe according to claim 1, characterized in that: The docking device comprises: A first clamp (3), the first clamp (3) being a clamping structure for clamping and fixing the outer side of the assembled circular tube; A second clamp (4), the second clamp (4) is a clamping structure that is clamped and fixed on the outside of the circular tube to be assembled; A pulling and closing jack (5) is fixed at one end on the second clamp (4) and at the other end on the first clamp (3), and is used for shrinking in the longitudinal direction to dock the two groups of round tube ends.

3. A method for constructing an underwater circular pipe according to claim 2, characterized in that: The docking device further comprises a guide rod (6); one end of the guide rod (6) is fixed to the second clamp (4) of the circular tube to be assembled, and the other end extends axially along the pipe. When two sets of adjacent circular tubes are docked, the other end of the guide rod (6) is inserted into the guide groove on the first clamp of the assembled circular tube.

4. A method for constructing an underwater circular pipe according to claim 3, characterized in that: A plurality of pulling and closing jacks (5) and a plurality of guide rods (6) are arranged on the second clamp (4), and the plurality of pulling and closing jacks (5) and the plurality of guide rods (6) are alternately arranged in sequence along the circumferential direction of the second clamp (4).

5. The method for constructing an underwater circular pipe according to claim 3, wherein: The docking device further comprises a docking joint (7); the docking joint (7) is an annular structure installed at the longitudinal front end of the circular tube, one end of the docking joint (7) is sleeved on the outer side of the end of the circular tube, and the other end is sleeved on the longitudinal rear end of the other adjacent circular tube after the adjacent circular tubes are docked; a guide tongue (8) is provided at the bottom of the longitudinal front end of the docking joint (7); the guide tongue (8) is an arc-shaped sheet structure with a small longitudinal front end and a large longitudinal rear end.

6. The method for constructing an underwater circular pipeline according to claim 1, wherein: The riprap leveling device comprises: A transverse track (10), both ends of which are connected to the construction platform (1) so as to be movable in the longitudinal direction; The first chute (12) is a telescopically adjustable hollow pipe structure. The upper end of the first chute (12) is connected to the transverse track (10) and can be moved in the transverse direction. The lower end is provided with a leveling head for leveling the base groove stone.

7. The method for constructing an underwater circular pipeline according to claim 1, wherein: The stone storage device comprises a riprap storage bin (13) and a backfill storage bin (14); the riprap storage bin (13) and the backfill storage bin (14) are respectively placed on two lateral sides of the construction platform (1).

8. The method for constructing an underwater circular pipeline according to claim 5, wherein: In step S5, the diver dives and uses the docking device to dock the circular tube to be assembled with the assembled circular tube, and the method includes: arranging a first clamp (3) and a second clamp (4) on the outside of the circular tube to be assembled, the circular tube lifting device uses the first clamp (3) and the second clamp (4) to lower the circular tube to be assembled, so that the circular tube to be assembled and the assembled circular tube are preliminarily docked, the diver enters the water and connects the pulling jack (5) on the second clamp (4) of the circular tube to be assembled with the first clamp (3) of the assembled circular tube, and tensions the circular tube to be assembled by the pulling jack (5), so that the circular tube to be assembled and the assembled circular tube are docked.

9. A method for constructing an underwater circular pipeline according to claim 8, characterized in that: The round tube hoisting device uses the first clamp (3) and the second clamp (4) to lower the round tube to be assembled, aligns the longitudinal rear end of the round tube to be assembled with the longitudinal front end of the assembled round tube (7), places the end of the round tube to be assembled on the guide tongue (8) at the front end of the butt joint (7), and simultaneously makes the end of the guide rod (6) on the second clamp (4) of the round tube to be assembled pass through the guide groove on the first clamp (3) of the assembled round tube, thereby completing the preliminary docking of the adjacent round tubes.

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