Immersed tube side-by-side floating deposit method

Abstract

The invention relates to the technical field of immersed tube tunnels, in particular to an immersed tube side-by-side floating deposit method which comprises the steps that a first immersed tube and a second immersed tube are prefabricated in a dry dock, the dry dock communicates with a floating transportation channel, a deposit area is arranged in the floating transportation channel and is parallel to the axis of a river channel, and foundation anchor sets are arranged at the upstream end and the downstream end of the deposit area; newly-added anchor sets are arranged on the sides, close to the dry dock, of the foundation anchor sets, and the method further comprises the following steps that S1, water is poured into the dry dock, and then the first immersed tube is transported out of the dock in a floating mode; s2, the first immersed tube is transported to a deposit area in a floating mode, and floating mooring of the first immersed tube is conducted through a foundation anchor set; s3, floating transportation and undocking of the second immersed tube: when the second immersed tube is transported to a deposit area in a floating manner, floating mooring of the second immersed tube is performed through the basic anchor group and the newly-added anchor group, and the second immersed tube and the first immersed tube are parked side by side; the foundation anchor group of the first immersed tube is effectively utilized, the arrangement of the anchor group of the second immersed tube is reduced, the construction procedure is simplified, the construction period is shortened, and the floating transportation channel area occupied by the immersed tubes is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of immersed tube tunnels, and in particular to a method for storing immersed tubes by floating. Background Art

[0002] In immersed tube tunnel projects, immersed tube segments and onshore docking segments are required. Immersed tube segments are generally prefabricated using the dry dock method. Due to the difference in the prefabrication completion time of the onshore docking segments and the immersed tube segments, and the limitations of the dry dock prefabrication site, the prefabricated segments are generally stored outside the dock. After the construction of the docking section is completed and the conditions for docking and installation are met, subsequent operations such as transportation and docking are carried out.

[0003] At present, the conventional method of storing submerged tube sections is single-section. Each submerged tube section needs to be anchored in the water with its own anchor block. Each submerged tube section will occupy a large area of ​​the floating canal. For example, a method for storing submerged tubes in narrow inland rivers with patent publication number CN113879464A is disclosed. Two tube sections are floated in different areas of the river channel using single-section storage.

[0004] However, when conventional methods are used to store two pipe sections individually, the two pipe sections are often floated separately, which will cause the submerged pipe to occupy a larger area of ​​the floating channel, affecting the normal use of the floating channel. Summary of the invention

[0005] The purpose of the present invention is to provide a method for storing submerged tubes by floating, in view of the problem in the background technology that when conventional methods are used to store two pipe sections individually, the two pipe sections are floated separately, which will cause the submerged tube to occupy a large area of ​​the floating channel, affecting the normal use of the floating channel.

[0006] The present invention provides a method for storing a submerged tube by floating, comprising a first submerged tube and a second submerged tube prefabricated in a dry dock, the dry dock being connected to a floating channel, a storage area being arranged in the floating channel, a basic anchor group being arranged at both the upstream and downstream ends of the storage area, and a new anchor group being arranged at one side of the basic anchor group close to the dry dock, and further comprising the following steps:

[0007] S1: filling the dry dock with water, and then floating the first immersed tube out of the dock;

[0008] S2: The first submerged tube is floated to the storage area, and the first submerged tube is floated by the basic anchor group;

[0009] S3: Floating and undocking the second submerged tube. When the second submerged tube is floated to the storage area, the second submerged tube is floated by the basic anchor group and the newly added anchor group, and the second submerged tube is stored side by side with the first submerged tube.

[0010] In a method for floating and storing submerged tubes of the present invention, a storage area, a basic anchor group and a newly added anchor group are first set in advance in a floating channel, and then the first submerged tube is floated to the storage area and stored by floating through the basic anchor group. When the second submerged tube is floated to the storage area, the second submerged tube is stored by floating through the basic anchor group and the newly added anchor group, and the second submerged tube is stored side by side with the first submerged tube. Since the second submerged tube is floated through the basic anchor group and the newly added anchor group, the first submerged tube and the second submerged tube are anchored to the basic anchor group together, so that the first submerged tube and the second submerged tube are stored together, the basic anchor group of the first submerged tube is effectively utilized, the setting of the anchor group of the second submerged tube is reduced, the construction process is simplified, and the construction period of the anchor group of the second submerged tube is shortened. Furthermore, the second submerged tube is stored side by side with the first submerged tube, so that the submerged tubes are stored by floating, and the floating channel area occupied by the second submerged tube and the first submerged tube is reduced, so as to facilitate the normal use of the floating channel.

[0011] Preferably, when the first immersed tube is moored, one end of the first immersed tube is connected to the basic anchor group located at the upstream end through a mooring cable group, and the other end of the first immersed tube is connected to the basic anchor group located at the downstream end through a mooring cable group;

[0012] When the second immersed tube is moored, one end of the second immersed tube is connected to the basic anchor group and the newly added anchor group at the upstream end through a mooring cable group, and the other end of the second immersed tube is connected to the basic anchor group and the newly added anchor group at the downstream end through a mooring cable group.

[0013] Through the above-mentioned floating method, the first immersed tube and the second immersed tube are stored in the direction of the water flow. During the storage period, the immersed tubes are mainly subjected to the longitudinal water flow force, and the lateral water flow force is relatively small, which effectively reduces the resistance of the water flow to the immersed tubes. At the same time, the lateral shaking of the immersed tubes in the water flow is reduced, thereby improving the stability of the immersed tubes.

[0014] Preferably, the basic anchor group includes an anchor block M1, an anchor block M2, an anchor block M3 and an anchor block M4, the anchor block M1 and the anchor block M2 are sequentially arranged at the downstream end of the storage area, and the anchor block M3 and the anchor block M4 are sequentially arranged at the upstream end of the storage area;

[0015] The newly added anchor group includes an anchor block M5 and an anchor block M6, wherein the anchor block M5 is located on a side of the anchor block M2 close to the dry dock, and the anchor block M6 is located on a side of the anchor block M4 close to the dry dock;

[0016] The mooring cable group includes a first mooring cable, a second mooring cable, a third mooring cable, a fourth mooring cable, a fifth mooring cable, a sixth mooring cable, a seventh mooring cable and an eighth mooring cable;

[0017] The first immersed tube is provided with bollards C1, C2, C3 and C4 in a clockwise direction, the bollards C1 and C2 are located at one end of the long side of the first immersed tube, and the bollards C3 and C4 are located at the other end of the long side of the first immersed tube;

[0018] The second immersed tube is provided with bollards D1, D2, D3 and D4 in a clockwise direction. The bollards D1 and D2 are located at one end of the long side of the second immersed tube, and the bollards D3 and D4 are located at the other end of the long side of the second immersed tube.

[0019] Preferably, in S2, when the first immersed tube is moored, the bollard C1 is connected to the anchor block M3 through the first mooring cable, the bollard C2 is connected to the anchor block M4 through the second mooring cable, the bollard C3 is connected to the anchor block M2 through the third mooring cable, and the bollard C4 is connected to the anchor block M1 through the fourth mooring cable;

[0020] The first mooring cable and the second mooring cable are arranged crosswise, and the third mooring cable and the fourth mooring cable are arranged crosswise.

[0021] The first immersed tube is connected to anchor blocks M1, M2, M3 and M4 by mooring cables to realize four-point mooring of the first immersed tube. The torque and load are evenly distributed through the four mooring points, making the first immersed tube more stable in the water and less likely to be shaken or tilted by water flow or wind, thus avoiding the possible tilting or flipping of the first immersed tube in the water and reducing the risk of accidents during operation. At the same time, the four-point mooring system can adapt to various water environments, including sea areas or rivers with large fluctuations, ensuring the stability of the first immersed tube under different water conditions;

[0022] Furthermore, the cross-arranged mooring cables can effectively disperse and balance the torque applied to the first immersed tube, reduce the tilting or rotation of the first immersed tube in the water, and keep it stable. At the same time, the cross-cable system reduces the risk of tilting or capsizing of the first immersed tube due to uneven tension in a single direction, thereby improving the safety of operation.

[0023] Preferably, in S3, after the front end of the second immersed tube drives out of the dock door, the second immersed tube is towed by a towing rope group to turn and move, so that the second immersed tube moves toward and approaches the first immersed tube.

[0024] Preferably, in S3, when the second immersed tube is moored, the bollard D1 is connected to the anchor block M4 through the fifth mooring cable, the bollard D2 is connected to the anchor block M6 through the sixth mooring cable, the bollard D3 is connected to the anchor block M5 through the seventh mooring cable, and the bollard D4 is connected to the anchor block M2 through the eighth mooring cable;

[0025] The fifth mooring line and the sixth mooring line are arranged crosswise, and the seventh mooring line and the eighth mooring line are arranged crosswise;

[0026] A buffer pad is arranged between the second immersed tube and the first immersed tube.

[0027] The second immersed tube is connected to anchor blocks M2, M4, M5 and M6 by mooring cables to achieve four-point mooring of the second immersed tube. The torque and load are evenly distributed through the four mooring points, making the second immersed tube more stable in the water and less likely to be shaken or tilted by water flow or wind, thus avoiding the possible tilting or flipping of the second immersed tube in the water and reducing the risk of accidents during operation. At the same time, the four-point mooring system can adapt to various water environments, including sea areas or rivers with large fluctuations, ensuring the stability of the second immersed tube under different water conditions;

[0028] Furthermore, the cross-arranged mooring cables can effectively disperse and balance the moment on the second immersed tube, reduce the tilt or rotation of the second immersed tube in the water, and keep it stable. At the same time, the cross-cable system reduces the risk of tilt or capsizing of the second immersed tube due to uneven tension in a single direction, thereby improving the safety of operation.

[0029] Furthermore, a buffer pad is arranged between the second immersed tube and the first immersed tube. The buffer pad is arranged to reduce direct contact between the immersed tubes, reduce friction and impact, and protect the structure of the immersed tubes. At the same time, the buffer pad can reduce the shaking of the immersed tubes caused by water flow and avoid mutual friction between the immersed tubes.

[0030] Preferably, before the second immersed tube is undocking, a first fairlead, a second fairlead, a third fairlead and a fourth fairlead are arranged on the second immersed tube in advance, the first fairlead is close to the mooring bollard D1, the second fairlead is close to the mooring bollard D2, the third fairlead is close to the mooring bollard D3, and the fourth fairlead is close to the mooring bollard D4;

[0031] It also includes a hoisting machine set in advance on the second immersed tube, the hoisting machine set is used to control the traction rope set, and the hoisting machine set includes the first hoist, the second hoist, the third hoist, the fourth hoist, the fifth hoist, the sixth hoist, the seventh hoist and the eighth hoist;

[0032] It also includes setting up a sea anchor group in advance on one side of the storage area close to the existing waterway, and the sea anchor group includes anchor point K1, anchor point K2, anchor point K3 and anchor point K4 which are sequentially arranged along the direction of water flow.

[0033] Preferably, the traction rope group includes a first traction rope, a second traction rope, a third traction rope, a fourth traction rope, a fifth traction rope, a sixth traction rope, a seventh traction rope and an eighth traction rope;

[0034] In S3, when the second immersed tube is towed by the towing rope assembly, one end of the first towing rope is connected to the first hoist, and the other end of the first towing rope is passed around the fourth fairlead and fixed to the embankment of the dry dock;

[0035] One end of the second traction rope is connected to the second hoist, and the other end of the second traction rope is passed around the fourth fairlead and fixed to the anchor point K3;

[0036] One end of the third traction rope is connected to the third hoist, and the other end of the third traction rope is passed around the first fairlead and fixed to the anchor block M4;

[0037] One end of the fourth traction rope is connected to the fourth winch, and the other end of the third traction rope is passed around the first fairlead and the second fairlead and fixed to the mooring pile C3, and the mooring pile C3 is connected to the sea anchor K2 through a second reinforcing cable;

[0038] One end of the fifth traction rope is connected to the fifth hoist, and the other end of the fifth traction rope is passed around the second fairlead and fixed to the mooring bollard C2, and the mooring bollard C2 is connected to the anchor point K1 through a first reinforcing cable;

[0039] One end of the sixth traction rope is connected to the sixth winch, and the other end of the sixth traction rope is passed around the second fairlead and fixed to the anchor block M6;

[0040] One end of the seventh traction rope is connected to the seventh winch, and the other end of the seventh traction rope is passed around the third fairlead and fixed to the anchor point K4;

[0041] One end of the eighth traction rope is connected to the eighth winch, and the other end of the eighth traction rope is fixed to the sea anchor K2;

[0042] It also includes an auxiliary rope, one end of which is fixed to the mooring pile D1, and one end of which is connected to a winch B1 installed in the dry dock.

[0043] The towing rope is matched with the fairlead, which can effectively guide the towing rope through a predetermined path. In addition, the fairlead is designed to guide the towing rope to transition smoothly and reduce friction and wear.

[0044] Preferably, in S3, the step of the traction rope group traction the second immersed tube is as follows:

[0045] S31: After the second immersed tube enters the storage area, the mooring pile D1 is fixed by the auxiliary rope, the second traction rope and the eighth traction rope are reeled in, the first traction rope is loosened, and the remaining ropes are not forced, and are retracted and released in time to rotate the second immersed tube around the mooring pile D1 until the second immersed tube is parallel to the first immersed tube;

[0046] S32: Then control the fourth traction rope, the fifth traction rope and the eighth traction rope to be retracted, the first traction rope and the auxiliary rope to be loosened, and the remaining ropes to be released and retracted in time without force, so that the second immersed tube is close to the first immersed tube;

[0047] S33: adjusting the position of the second immersed tube left and right by using the second traction rope, the third traction rope, the sixth traction rope and the seventh traction rope so that the second immersed tube is aligned side by side with the first immersed tube;

[0048] S34: Control the fourth traction rope, the fifth traction rope and the eighth traction rope to reel in, and the first traction rope and the auxiliary rope to loosen, so that the second immersed tube abuts against the first immersed tube.

[0049] The second immersed tube is turned and displaced by the cooperation of the winch group, traction rope group, sea anchor group and auxiliary rope, so that the second immersed tube and the first immersed tube are placed side by side, reducing the river area occupied by the second immersed tube and the first immersed tube, so as to facilitate the normal use of the floating channel.

[0050] Preferably, after the second immersed tube is moored, all cables, all winches and all fairleads are then removed.

[0051] Preferably, the anchor block comprises an anchor block body, the bottom of each side of the anchor block body extends downward to form a toe plate, and the toe plates are sequentially connected to form a cavity with an open lower end.

[0052] The toe plate comprises a first toe plate arranged along the displacement direction of the anchor block, and the bottom of the first toe plate (551) is arranged to be inclined outward relative to the anchor block body.

[0053] Compared with the prior art, the present invention has the following beneficial effects:

[0054] The present invention provides a method for floating and storing submerged tubes. The method comprises the following steps: firstly, a storage area, a basic anchor group and a newly added anchor group are set in advance in a floating channel. Then, a first submerged tube is floated to the storage area and stored by floating through the basic anchor group. When the second submerged tube is floated to the storage area, the second submerged tube is stored by floating through the basic anchor group and the newly added anchor group. The second submerged tube is stored side by side with the first submerged tube. Since the second submerged tube is floated through the basic anchor group and the newly added anchor group, the first submerged tube and the second submerged tube are anchored to the basic anchor group together. The first submerged tube and the second submerged tube are stored together. The basic anchor group of the first submerged tube is effectively utilized, the setting of the anchor group of the second submerged tube is reduced, the construction process is simplified, and the construction period of the anchor group of the second submerged tube is shortened. Furthermore, the second submerged tube is stored side by side with the first submerged tube to realize floating and storing the submerged tubes. The area of ​​the floating channel occupied by the second submerged tube and the first submerged tube is reduced, so as to facilitate the normal use of the floating channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a schematic diagram of the dry dock and floating channel of this application.

[0056] Figure 2 This is the schematic diagram of the storage of the first immersed tube.

[0057] Figure 3 This is a schematic diagram of the second immersed tube approaching the first immersed tube.

[0058] Figure 4 yes Figure 3 Schematic diagram of the middle traction rope arrangement.

[0059] Figure 5 This is a schematic diagram of the winch and mooring pile on the immersed tube.

[0060] Figure 6 This is a schematic diagram of the second immersed tube being stored side by side with the first immersed tube.

[0061] Figure 7 This is a schematic diagram of the traction rope when the second immersed tube is stored side by side with the first immersed tube.

[0062] Figure 8 This is a schematic diagram of the mooring of the second immersed tube to the first immersed tube.

[0063] Fig. 9 yes Figure 8 Schematic diagram of the connection between the mooring bollard and the mooring cable.

[0064] Fig.10 It is a schematic diagram of the anchor block structure of this application.

[0065] Fig.11 yes Fig.10 Top view of the .

[0066] Fig.12 It is a schematic diagram of the application of the anchor block of the present application in a river channel.

[0067] Markings in the figure:

[0068] 1-traction rope group, 11-first traction rope, 12-second traction rope, 13-third traction rope, 14-fourth traction rope, 15-fifth traction rope, 16-sixth traction rope, 17-seventh traction rope, 18-eighth traction rope, 2-first immersed tube, 3-second immersed tube, 301-first fairlead, 302-second fairlead, 303-third fairlead, 304-fourth fairlead, 41-first winch, 42-second winch, 43-third winch, 44-fourth winch, 45-fifth winch, 46-sixth winch, 47-seventh winch, 48-eighth winch, 5-foundation anchor group, 6- New anchor group, 7-sea anchor group, 81-first reinforcement cable, 82-second reinforcement cable, 9-mooring cable group, 91-first mooring cable, 92-second mooring cable, 93-third mooring cable, 94-fourth mooring cable, 95-fifth mooring cable, 96-sixth mooring cable, 97-seventh mooring cable, 98-eighth mooring cable, 10-dry dock, 20-floating channel, 30-storage area, 40-auxiliary rope, 51-anchor block body, 52-traction plate, 53-anchor chain, 54-connecting pipe, 55-toe plate, 551-first toe plate, 56-cavity, 60-foundation pit, 70-backfill stone, 80-cushion, 801-cushion stone. DETAILED DESCRIPTION

[0069] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0070] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all based on the expression of the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0071] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0072] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0073] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0074] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0075] Example 1

[0076] like Figure 1-Figure 9 As shown, a method for floating storage of immersed tubes in this embodiment includes a first immersed tube 2 and a second immersed tube 3 prefabricated in a dry dock 10, the dry dock 10 is connected to a floating channel 20, a storage area 30 is provided in the floating channel 20, a basic anchor group 5 is provided at both the upstream and downstream ends of the storage area 30, and a new anchor group 6 is provided at both the side of the basic anchor group 5 close to the dry dock 10, and further includes the following steps:

[0077] S1: filling the dry dock 10 with water, and then floating out the first immersed tube 2;

[0078] S2: The first immersed tube 2 is floated to the storage area 30, and the first immersed tube 2 is floated by the basic anchor group 5;

[0079] S3: Floating out of the second immersed tube 3. When the second immersed tube 3 is floated to the storage area 30, the second immersed tube 3 is floated by the basic anchor group 5 and the newly added anchor group 6, and the second immersed tube 3 is stored side by side with the first immersed tube 2.

[0080] Since the second immersed tube 3 is floated by the basic anchor group 5 and the newly added anchor group 6, the first immersed tube 2 and the second immersed tube 3 are anchored together at the basic anchor group, so that the first immersed tube 2 and the second immersed tube 3 are stored together, and the basic anchor group 5 of the first immersed tube 2 is effectively utilized, the anchor group setting of the second immersed tube 3 is reduced, the construction process is simplified, and the construction period of the anchor group of the second immersed tube 3 is shortened. Furthermore, the second immersed tube 3 and the first immersed tube 2 are stored side by side, and the immersed tubes are stored side by side by floating, thereby reducing the area of ​​the floating channel 20 occupied by the second immersed tube 3 and the first immersed tube 2, so as to facilitate the normal use of the floating channel 20.

[0081] The storage area 30 is arranged along the water flow direction, that is, the long side of the storage area 30 is along the water flow direction.

[0082] In one or more embodiments, Figure 2 , Figure 8 As shown, when the first immersed tube 2 is moored, one end of the first immersed tube 2 is connected to the basic anchor group 5 at the upstream end through the mooring cable group 9, and the other end of the first immersed tube 2 is connected to the basic anchor group 5 at the downstream end through the mooring cable group 9;

[0083] When the second immersed tube 3 is moored, one end of the second immersed tube 3 is connected to the basic anchor group 5 and the newly added anchor group 6 at the upstream end through the mooring cable group 9, and the other end of the second immersed tube 3 is connected to the basic anchor group 5 and the newly added anchor group 6 at the downstream end through the mooring cable group 9.

[0084] Through the above-mentioned floating method, the first immersed tube 2 and the second immersed tube 3 are stored in the direction of the water flow. The immersed tubes are mainly subjected to the longitudinal water flow force, and the lateral water flow force is relatively small, which effectively reduces the resistance of the water flow to the immersed tubes. At the same time, the lateral shaking of the immersed tubes in the water flow is reduced, and the stability of the immersed tubes is improved.

[0085] In an optional embodiment, if Figure 2 As shown, the basic anchor group 5 includes an anchor block M1, an anchor block M2, an anchor block M3 and an anchor block M4, wherein the anchor block M1 and the anchor block M2 are sequentially arranged at the downstream end of the storage area 30, and the anchor block M3 and the anchor block M4 are sequentially arranged at the upstream end of the storage area 30;

[0086] The connecting line between the anchor block M3 and the anchor block M4 is perpendicular to the water flow direction, and the anchor block M3 is located on the side of the anchor block M4 away from the dry dock 10;

[0087] The connecting line between the anchor block M1 and the anchor block M2 is perpendicular to the water flow direction, and the anchor block M1 is located on the side of the anchor block M2 away from the dry dock 10;

[0088] The newly added anchor group 6 includes an anchor block M5 and an anchor block M6. The anchor block M5 is located on a side of the anchor block M2 close to the dry dock 10, and the anchor block M6 is located on a side of the anchor block M4 close to the dry dock 10.

[0089] like Figure 4 As shown, the mooring cable group 9 includes a first mooring cable 91, a second mooring cable 92, a third mooring cable 93, a fourth mooring cable 94, a fifth mooring cable 95, a sixth mooring cable 96, a seventh mooring cable 97 and an eighth mooring cable 98;

[0090] like Figure 5 As shown, bollards C1, bollards C2, bollards C3 and bollards C4 are arranged on the first immersed tube 2 in a clockwise direction. Bollards C1 and bollards C2 are located at one end of the long side of the first immersed tube 2, and bollards C3 and bollards C4 are located at the other end of the long side of the first immersed tube 2.

[0091] Bollards D1, D2, D3 and D4 are arranged on the second immersed tube 3 in a clockwise direction. Bollards D1 and D2 are located at one end of the long side of the second immersed tube 3, and bollards D3 and D4 are located at the other end of the long side of the second immersed tube 3.

[0092] like Figure 1-Figure 9 As shown, the method for storing a submerged tube by floating in this embodiment comprises the following specific steps:

[0093] S1: Figure 1-Figure 2 As shown, the dry dock 10 is filled with water, and then the first immersed tube 2 is floated out of the dock;

[0094] Before the water filling work of dry dock 10, the two pipe sections are roped in the dock to control the floating posture of the two pipe sections. The ropes in the dock of the two pipe sections are 8 φ40mm high-strength nylon cables. Each cable should be tightened and tied as much as possible (with the help of winch) to prevent the submerged tube from moving during the floating process.

[0095] In an optional embodiment, the first immersed tube 2 can be undocking by towing it by an engineering barge, and the first immersed tube 2 can be floated out of the dock by cooperating with the anchors around the dry dock 10, the pipe surface and the winches arranged on the engineering barge. After being undocking, the first immersed tube 2 can be consigned to the storage area 30 by the engineering barge.

[0096] S2: Figure 2 As shown, the first immersed tube 2 is floated to the storage area 30, and the first immersed tube 2 is floated by the basic anchor group 5;

[0097] When the first immersed tube 2 is moored, the bollard C1 is connected to the anchor block M3 through the first mooring cable 91, the bollard C2 is connected to the anchor block M4 through the second mooring cable 92, the bollard C3 is connected to the anchor block M2 through the third mooring cable 93, and the bollard C4 is connected to the anchor block M1 through the fourth mooring cable 94;

[0098] The first mooring line 91 and the second mooring line 92 are arranged crosswise, and the third mooring line 93 and the fourth mooring line 94 are arranged crosswise.

[0099] S3: Figure 3-Figure 6 As shown, the second immersed tube 3 is floated out of the dock. When the second immersed tube 3 is floated to the storage area 30, the second immersed tube 3 is floated by the basic anchor group 5 and the newly added anchor group 6, and the second immersed tube 3 is stored side by side with the first immersed tube 2.

[0100] In an optional implementation manner, the second immersed tube 3 can be undocking by towing with an engineering barge, and the second immersed tube 3 can be floated out of the dry dock 10 by cooperating with the anchors around the dry dock 10, the pipe surface and the winches arranged on the engineering barge;

[0101] In S3, such as Figure 3 As shown, after the front end of the second immersed tube 3 drives out of the dock door, the second immersed tube 3 is towed by the traction rope group 1 to turn and move, so that the second immersed tube 3 moves toward and approaches the first immersed tube 2.

[0102] In an optional embodiment, if Figure 5 As shown, before the second immersed tube 3 is undocking, a first fairlead 301, a second fairlead 302, a third fairlead 303 and a fourth fairlead 304 are arranged on the second immersed tube 3 in advance, the first fairlead 301 is close to the mooring bollard D1, the second fairlead 302 is close to the mooring bollard D2, the third fairlead 303 is close to the mooring bollard D3, and the fourth fairlead 304 is close to the mooring bollard D4;

[0103] like Figure 5 As shown, it also includes a hoisting group pre-arranged on the second immersed tube 3, the hoisting group is used to control the traction rope group 1, and the hoisting group includes a first hoist 41, a second hoist 42, a third hoist 43, a fourth hoist 44, a fifth hoist 45, a sixth hoist 46, a seventh hoist 47 and an eighth hoist 48;

[0104] like Figure 1 , Figure 2 As shown, it also includes a sea anchor group 7 set in advance in the storage area 30 close to one side of the existing waterway, and the sea anchor group 7 includes anchor points K1, anchor points K2, anchor points K3 and anchor points K4 which are sequentially set along the direction of the water flow.

[0105] like Figure 3 , Figure 4As shown, the traction rope group 1 includes a first traction rope 11, a second traction rope 12, a third traction rope 13, a fourth traction rope 14, a fifth traction rope 15, a sixth traction rope 16, a seventh traction rope 17 and an eighth traction rope 18;

[0106] In S3, such as Figure 4 , Figure 5 As shown, when the second immersed tube 3 is towed by the towing rope group 1, one end of the first towing rope 11 is connected to the first hoist 41, and the other end of the first towing rope 11 passes around the fourth fairlead 304 and is fixed to the embankment of the dry dock 10;

[0107] One end of the second traction rope 12 is connected to the second hoist 42, and the other end of the second traction rope 12 is passed around the fourth fairlead 304 and fixed to the anchor point K3;

[0108] One end of the third traction rope 13 is connected to the third hoist 43, and the other end of the third traction rope 13 is passed around the first fairlead 301 and fixed to the anchor block M4;

[0109] One end of the fourth traction rope 14 is connected to the fourth hoist 44, and the other end of the third traction rope 13 is passed around the first fairlead 301 and the second fairlead 302 and fixed to the mooring pile C3, and the mooring pile C3 is connected to the sea anchor K2 through the second reinforcing cable 82;

[0110] One end of the fifth traction rope 15 is connected to the fifth hoist 45, and the other end of the fifth traction rope 15 is passed around the second fairlead 302 and fixed to the mooring pile C2, and the mooring pile C2 is connected to the anchor point K1 through the first reinforcing cable 81;

[0111] One end of the sixth traction rope 16 is connected to the sixth hoist 46, and the other end of the sixth traction rope 16 is passed around the second fairlead 302 and fixed to the anchor block M6;

[0112] One end of the seventh traction rope 17 is connected to the seventh hoist 47, and the other end of the seventh traction rope 17 is passed around the third fairlead 303 and fixed to the anchor point K4;

[0113] One end of the eighth traction rope 18 is connected to the eighth winch 48, and the other end of the eighth traction rope 18 is fixed to the sea anchor K2;

[0114] The auxiliary rope 40 is also included. One end of the auxiliary rope 40 is fixed to the mooring pile D1 , and the other end of the auxiliary rope 40 is connected to the winch B1 set on the dry dock 10 .

[0115] In S3, such as Figure 4-Figure 7 As shown, the steps of pulling the second immersed tube 3 by the pulling rope group 1 are as follows:

[0116] S31: After the second immersed tube 3 enters the storage area 30, the mooring pile D1 is fixed by the auxiliary rope 40, the second traction rope 12 and the eighth traction rope 18 are reeled in, the first traction rope 11 is loosened, and the remaining ropes are not forceful and are retracted and released in time to rotate the second immersed tube 3 around the mooring pile D1 until the second immersed tube 3 is parallel to the first immersed tube 2;

[0117] S32: Then control the fourth traction rope 14, the fifth traction rope 15 and the eighth traction rope 18 to retract, the first traction rope 11 and the auxiliary rope 40 to loosen, and the remaining cables are not forced, and are retracted and released in time to make the second immersed tube 3 close to the first immersed tube 2;

[0118] S33: The position of the second immersed tube 3 is adjusted left and right by the second traction rope 12, the third traction rope 13, the sixth traction rope 16 and the seventh traction rope 17, so that the second immersed tube 3 is aligned side by side with the first immersed tube 2;

[0119] S34: Then control the fourth traction rope 14, the fifth traction rope 15 and the eighth traction rope 18 to reel in, and the first traction rope 11 and the auxiliary rope 40 to loosen, so that the second immersed tube 3 abuts against the first immersed tube 2.

[0120] In S3, such as Figure 8 , Fig. 9 As shown, when the second immersed tube 3 is moored, the bollard D1 is connected to the anchor block M4 through the fifth mooring cable 95, the bollard D2 is connected to the anchor block M6 through the sixth mooring cable 96, the bollard D3 is connected to the anchor block M5 through the seventh mooring cable 97, and the bollard D4 is connected to the anchor block M2 through the eighth mooring cable 98;

[0121] The fifth mooring line 95 and the sixth mooring line 96 are arranged crosswise, and the seventh mooring line 97 and the eighth mooring line 98 are arranged crosswise;

[0122] A buffer pad is provided between the second immersed tube 3 and the first immersed tube 2 .

[0123] After the second immersed tube 3 is moored, all cables, all winches and all fairleads are removed, such as Figure 8 .

[0124] In one or several embodiments, the pipe segment is floated to the storage area 30 through the floating channel 20, the bottom elevation of the floating channel 20 is -5.0m, the storage area 30 is arranged parallel to the river axis, the E3 and E4 pipe segments are stored side by side, the storage area is 124.5m long, 101.8m wide, and the bottom elevation is -6.5m, wherein the first immersed tube 2 of the present application refers to the E4 pipe segment, and the second immersed tube 3 refers to the E3 pipe segment.

[0125] In one or more embodiments, before the pipe segment is undocking, preparations for floating and storing the E4 pipe segment and the E3 pipe segment are carried out. The preparations include dredging the floating route and storage area of ​​the E4 / E3 pipe segment, hard sweeping and acceptance of the floating route and storage area of ​​the E4 / E3 pipe segment, multi-beam sweeping and acceptance of the floating route and storage area of ​​the E4 / E3 pipe segment, setting up the E4 / E3 mooring system, tensile testing of the E4 / E3 mooring system, dry dock cleaning, mooring in the submerged dock, water filling in the dock, leak testing, floating, dock door storage, etc.

[0126] In one or several embodiments, before the pipe segment is undocking, the pipe segment is tested for leaks and floated. The pipe segment test for leaks and floated includes two major parts: preparation work before dry dock water filling and work after dry dock water filling.

[0127] Preparation work before filling the dry dock 10

[0128] (1) Clear the mechanical equipment, materials and debris that may affect floating in the dock, check the sealing of steel sealing doors, watertight doors and short manholes on the top of the pipe; check whether the inlet, outlet and exhaust pipes are blocked, and clean the surface debris of joints and guide devices.

[0129] (2) Confirm that the pipe segment is installed in place, mainly including:

[0130] ① Outside of the pipe joint: GINA rubber waterstop, GINA rubber belt protection device, hanging embankment, mooring pile, steel sealing door, watertight door, short manhole steel casing, etc.

[0131] ②Inside the pipe section: ballast water tank, pressure drainage system, temporary lighting system and ventilation system inside the pipe, etc.

[0132] (3) Check the 250kN anchor pile and 200kN anchor:

[0133] A total of 14 anchor structures are set up around the dry dock, A1~A9 are 250kN anchors, B1~B5 are 200kN anchors. Before the E3 and E4 pipe sections are undocking, the above 14 anchor piles and their embedded wire ropes are inspected in accordance with the wire rope use specifications and anchor use specifications.

[0134] (4) Before mooring in the dock, all equipment including winches, generators, etc. shall be tested and inspected to ensure that the equipment is normal and can be operated correctly.

[0135] Work after dry dock filling

[0136] (1) Pipe joint leak test

[0137] ① Fill the dry dock with water until the pipe joint is immersed in water to a depth of 4m. The stop time shall not be less than 24 hours. Check the leakage of the end sealing door, side wall, watertight door and bottom of the immersed tube. Make marks and make written records. If there is no water leakage for 24 hours, it means that the above-mentioned structure has passed the test.

[0138] ② Add water to the pipe joint ballast water tank step by step, evenly and symmetrically, and check the water tightness of the water tank partition and both sides and the operability of the water inlet and outlet systems. After the test is completed, add water to the water tank to reach 1.05 times the amount of water required for ballast (3.5m deep), then fill the dry dock with water until the pipe joint enters the water to a depth of 8m, and repeat the leak test.

[0139] ③ Continue to fill the dry dock with water until the pipe joint is submerged more than 0.5m above the top of the pipe joint (maximum water depth of 9.7m), check the leakage of the end sealing door, watertight door, bottom of the pipe joint, top of the pipe joint and side wall, and make marks and written records. This process should not be less than 24 hours. If no leakage is found in 24 hours, it means that the pipe joint has passed the test.

[0140] (2) Pipe segment buoyancy and freeboard determination

[0141] ① Evenly and symmetrically discharge the ballast water in each ballast water tank in the pipe segment. When the water level in the water tank is close to 1.8m, the land measurement system monitors the pipe segment posture in real time. Once the pipe segment shows signs of floating, the drainage rate should be slowed down and the water level in the water tank should be adjusted according to the pipe segment posture to ensure that the pipe segment floats smoothly.

[0142] ② After the bottom of the pipe is completely separated from the bottom of the dock, the water should be drained evenly and symmetrically until the average water level in each water tank is no more than 5cm, so that the pipe section obtains the maximum freeboard value.

[0143] ③ After the submerged tube is floated, the freeboard values ​​of the four corner points of the tube section should be measured under stable conditions.

[0144] In one or several embodiments, the mooring system of the E3 and E4 pipe section storage area consists of 6 gravity anchor blocks (M1-M6) and 8 mooring cables. After the excavation of the anchor block pit is completed, 1m thick riprap is carried out on the bottom of the anchor block pit to squeeze out the silt, and then a crane ship is used to cooperate with measurement and positioning to install the anchor blocks. After the anchor blocks are installed, 3m thick gravel is backfilled in the anchor block pit.

[0145] Before the pipe segment is undocking, the mooring system of the storage area 30 shall be tested. If any problems occur during the test pulling process, they shall be recorded and solved in time. A written report shall be made for the whole process of the test pulling.

[0146] Example 2

[0147] On the basis of Example 1, Figure 10-12 In the embodiment of the present invention, a method for storing a submerged pipe by floating is described, wherein the anchor block comprises an anchor block body 51, and each side bottom of the anchor block body 51 extends downward to form a toe plate 55, and the toe plates 55 are connected in sequence to form a cavity 56 with an open lower end.

[0148] The toe plate 55 comprises a first toe plate 551 arranged along the displacement direction of the anchor block, and the bottom of the first toe plate 551 is arranged to be inclined outward relative to the anchor block body 51 .

[0149] When setting the anchor block in the floating channel 20, the anchor block body 51 is placed on the cushion layer 80 at the bottom of the foundation pit 60, the toe plate 55 is in contact with the cushion layer 80, and the backfill stone 70 is filled between the foundation pit 60 and the anchor block body 51. In the process of the anchor chain 53 pulling the anchor block body 51 to move, the backfill stone 70 filled between the anchor block body 51 and the foundation pit 60 will generate an external reaction force opposite to the displacement direction on the anchor block body 51, making it difficult for the anchor block body 51 to be pulled out. At the same time, when the anchor block body 51 moves, the bottom of the first toe plate 551 is inclined outwardly relative to the anchor block body 51, so that the outer side surface of the first toe plate 551 forms a A gradually outwardly offset inclined surface, so that when the anchor block body 51 is pulled, the first toe plate 551 can be embedded in the cushion layer 80 at the bottom of the foundation pit 60, and then the cushion stone 801 can enter the cavity 56. During the displacement of the anchor block body 51, the cushion stone 801 will generate a cavity reaction force on the cavity 56 that is opposite to the displacement direction. As the displacement increases, the cushion stone 801 entering the cavity 56 increases, and the cavity 56 reaction force generated is greater. Furthermore, in the process of the anchor block body 51 being pulled and gradually embedded in the cushion layer 80, the backfill stone 70 and the cushion stone 801 will both generate friction on the anchor block body 51, causing the anchor block body 51 to be pulled tighter and tighter.

[0150] In the present application, the mooring cable of the mooring cable group 9 is connected to the anchor chain 53, the first toe plate 551 is connected to the towing plate 52, and the anchor chain 53 is connected to the towing plate 52. During the storage process of the first immersed tube 2 and the second immersed tube 3, the anchor block body 51 tightens the immersed tube through the anchor chain 53 and the mooring cable to resist the force of the flowing water on the immersed tube, so that the immersed tube can float and be stored in the storage area 30.

[0151] In the present application, the anchor blocks of this embodiment constitute a basic anchor group 5 and a newly added anchor group 6.

[0152] like Fig.10 , Fig.11 As shown, the lower thickness of the first toe plate 551 is smaller than the upper thickness of the first toe plate 551, so that the inner side surface of the first toe plate 551 forms a slope that gradually shifts outward from top to bottom, so that when the first toe plate 551 is embedded in the cushion layer 80 of the foundation pit 60, the cushion layer stone 801 can be more conveniently inserted into the cavity 56.

[0153] like Fig.10 , Fig.11As shown, a connecting pipe 54 is opened at the top of the anchor block body 51, and the connecting pipe 54 is connected to the inner cavity 56 of the anchor block. When the anchor block is installed, the air in the cavity 56 when the anchor block enters the water is discharged through the connecting pipe 54, thereby facilitating the installation of the anchor block and avoiding the formation of bubbles at the top of the cavity 56 when the anchor block is installed, which interferes with the underwater installation operation of the anchor block, thereby improving the installation efficiency of the anchor block. Furthermore, a plurality of connecting pipes 54 are arranged on the top of the anchor block body 51 to improve the exhaust capacity of the connecting pipe 54.

[0154] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for storing a submerged tube by floating, comprising a first submerged tube (2) and a second submerged tube (3) prefabricated in a dry dock (10), characterized in that: The dry dock (10) is connected to a floating channel (20), a storage area (30) is arranged in the floating channel (20), a basic anchor group (5) is arranged at the upstream end and the downstream end of the storage area (30), and a new anchor group (6) is arranged on the side of the basic anchor group (5) close to the dry dock (10), and the following steps are also included: S1: filling the dry dock (10) with water, and then floating the first immersed tube (2) out of the dock; S2: Floating the first immersed tube (2) to the storage area (30), and floating the first immersed tube (2) by means of the basic anchor group (5); S3: The second immersed tube (3) is floated out of the dock. When the second immersed tube (3) is floated to the storage area (30), the second immersed tube (3) is floated by the basic anchor group (5) and the newly added anchor group (6), and the second immersed tube (3) is stored side by side with the first immersed tube (2).

2. A method for storing submerged tubes by floating according to claim 1, characterized in that: When the first immersed tube (2) is moored, one end of the first immersed tube (2) is connected to the basic anchor group (5) located at the upstream end through a mooring cable group (9), and the other end of the first immersed tube (2) is connected to the basic anchor group (5) located at the downstream end through a mooring cable group (9); When the second immersed tube (3) is moored, one end of the second immersed tube (3) is connected to the basic anchor group (5) and the newly added anchor group (6) located at the upstream end through the mooring cable group (9), and the other end of the second immersed tube (3) is connected to the basic anchor group (5) and the newly added anchor group (6) located at the downstream end through the mooring cable group (9).

3. A method for storing submerged tubes by floating according to claim 2, characterized in that: The basic anchor group (5) includes an anchor block M1, an anchor block M2, an anchor block M3 and an anchor block M4, wherein the anchor block M1 and the anchor block M2 are sequentially arranged at the downstream end of the storage area (30), and the anchor block M3 and the anchor block M4 are sequentially arranged at the upstream end of the storage area (30); The newly added anchor group (6) includes an anchor block M5 and an anchor block M6, wherein the anchor block M5 is located on a side of the anchor block M2 close to the dry dock (10), and the anchor block M6 is located on a side of the anchor block M4 close to the dry dock (10); The mooring cable group (9) comprises a first mooring cable (91), a second mooring cable (92), a third mooring cable (93), a fourth mooring cable (94), a fifth mooring cable (95), a sixth mooring cable (96), a seventh mooring cable (97) and an eighth mooring cable (98); The first immersed tube (2) is provided with a mooring bollard C1, a mooring bollard C2, a mooring bollard C3 and a mooring bollard C4 in a clockwise direction, the mooring bollard C1 and the mooring bollard C2 being located at one end of the long side of the first immersed tube (2), and the mooring bollard C3 and the mooring bollard C4 being located at the other end of the long side of the first immersed tube (2); A mooring bollard D1, a mooring bollard D2, a mooring bollard D3 and a mooring bollard D4 are arranged on the second immersed tube (3) in a clockwise direction, the mooring bollard D1 and the mooring bollard D2 are located at one end of the long side of the second immersed tube (3), and the mooring bollard D3 and the mooring bollard D4 are located at the other end of the long side of the second immersed tube (3).

4. A method for storing submerged tubes by floating according to claim 3, characterized in that: In S2, when the first immersed tube (2) is moored, the bollard C1 is connected to the anchor block M3 through the first mooring cable (91), the bollard C2 is connected to the anchor block M4 through the second mooring cable (92), the bollard C3 is connected to the anchor block M2 through the third mooring cable (93), and the bollard C4 is connected to the anchor block M1 through the fourth mooring cable (94); The first mooring cable (91) and the second mooring cable (92) are arranged crosswise, and the third mooring cable (93) and the fourth mooring cable (94) are arranged crosswise.

5. A method for storing submerged tubes by floating according to claim 4, characterized in that: In S3, after the front end of the second immersed tube (3) drives out of the dock door, the second immersed tube (3) is towed by a towing rope group (1) to turn and move, so that the second immersed tube (3) moves toward and approaches the first immersed tube (2).

6. A method for storing submerged tubes by floating according to claim 5, characterized in that: In S3, when the second immersed tube (3) is moored, the bollard D1 is connected to the anchor block M4 through the fifth mooring cable (95), the bollard D2 is connected to the anchor block M6 through the sixth mooring cable (96), the bollard D3 is connected to the anchor block M5 through the seventh mooring cable (97), and the bollard D4 is connected to the anchor block M2 through the eighth mooring cable (98); The fifth mooring cable (95) and the sixth mooring cable (96) are arranged crosswise, and the seventh mooring cable (97) and the eighth mooring cable (98) are arranged crosswise; A buffer pad is provided between the second immersed tube (3) and the first immersed tube (2).

7. A method for storing submerged tubes by floating according to claim 6, characterized in that: Before the second immersed tube (3) is undocking, a first fairlead (301), a second fairlead (302), a third fairlead (303) and a fourth fairlead (304) are arranged on the second immersed tube (3) in advance, wherein the first fairlead (301) is close to the mooring bollard D1, the second fairlead (302) is close to the mooring bollard D2, the third fairlead (303) is close to the mooring bollard D3, and the fourth fairlead (304) is close to the mooring bollard D4; It also includes a hoisting machine group pre-arranged on the second immersed tube (3), the hoisting machine group is used to control the traction rope group (1), and the hoisting machine group includes a first hoist (41), a second hoist (42), a third hoist (43), a fourth hoist (44), a fifth hoist (45), a sixth hoist (46), a seventh hoist (47) and an eighth hoist (48); It also includes a sea anchor group (7) arranged in advance at the storage area (30) close to one side of the existing waterway, wherein the sea anchor group (7) includes an anchor point K1, an anchor point K2, an anchor point K3 and an anchor point K4 arranged in sequence along the direction of the water flow.

8. A method for storing submerged tubes by floating according to claim 7, characterized in that: The traction rope set (1) comprises a first traction rope (11), a second traction rope (12), a third traction rope (13), a fourth traction rope (14), a fifth traction rope (15), a sixth traction rope (16), a seventh traction rope (17) and an eighth traction rope (18); In S3, when the second immersed tube (3) is towed by the towing rope group (1), one end of the first towing rope (11) is connected to the first hoist (41), and the other end of the first towing rope (11) is passed around the fourth fairlead (304) and fixed to the embankment of the dry dock (10); One end of the second traction rope (12) is connected to the second hoist (42), and the other end of the second traction rope (12) is passed around the fourth fairlead (304) and fixed to the anchor point K3; One end of the third traction rope (13) is connected to the third hoist (43), and the other end of the third traction rope (13) is passed around the first fairlead (301) and fixed to the anchor block M4; One end of the fourth traction rope (14) is connected to the fourth winch (44), and the other end of the third traction rope (13) is passed around the first fairlead (301) and the second fairlead (302) and fixed to the mooring pile C3, and the mooring pile C3 is connected to the sea anchor K2 via a second reinforcing cable (82); One end of the fifth traction rope (15) is connected to the fifth hoist (45), and the other end of the fifth traction rope (15) is passed around the second fairlead (302) and fixed to the mooring pile C2, and the mooring pile C2 is connected to the anchor point K1 through a first reinforcing cable (81); One end of the sixth traction rope (16) is connected to the sixth winch (46), and the other end of the sixth traction rope (16) is passed around the second fairlead (302) and fixed to the anchor block M6; One end of the seventh traction rope (17) is connected to the seventh winch (47), and the other end of the seventh traction rope (17) is passed around the third fairlead (303) and fixed to the anchor point K4; One end of the eighth traction rope (18) is connected to the eighth winch (48), and the other end of the eighth traction rope (18) is fixed to the sea anchor K2; It also includes an auxiliary rope (40), one end of which is fixed to the mooring pile D1, and one end of which is connected to a winch B1 provided on the dry dock (10).

9. A method for storing submerged tubes by floating according to claim 8, characterized in that: In S3, the steps of using the traction rope group (1) to pull the second immersed tube (3) are as follows: S31: After the second immersed tube (3) enters the storage area (30), the mooring pile D1 is fixed by the auxiliary rope (40), the second traction rope (12) and the eighth traction rope (18) are reeled in, the first traction rope (11) is loosened, and the remaining ropes are free of force and retracted and released in time, so that the second immersed tube (3) is rotated around the mooring pile D1 until the second immersed tube (3) is parallel to the first immersed tube (2); S32: Then, the fourth traction rope (14), the fifth traction rope (15) and the eighth traction rope (18) are controlled to be retracted, the first traction rope (11) and the auxiliary rope (40) are loosened, and the remaining cables are not tensioned and are retracted and released in time, so that the second immersed tube (3) is close to the first immersed tube (2); S33: adjusting the position of the second immersed tube (3) left and right by using the second traction rope (12), the third traction rope (13), the sixth traction rope (16) and the seventh traction rope (17) so that the second immersed tube (3) is aligned side by side with the first immersed tube (2); S34: Then control the fourth traction rope (14), the fifth traction rope (15) and the eighth traction rope (18) to reel in, and the first traction rope (11) and the auxiliary rope (40) to loosen, so that the second immersed tube (3) abuts against the first immersed tube (2).

10. A method for storing submerged tubes by floating according to claim 3, characterized in that: The anchor block comprises an anchor block body (51), the bottom of each side of the anchor block body (51) extends downward to form a toe plate (55), the toe plates (55) are connected in sequence and enclose a cavity (56) with an open lower end. The toe plate (55) comprises a first toe plate (551) arranged along the displacement direction of the anchor block, and the bottom of the first toe plate (551) is arranged to be inclined outward relative to the anchor block body (51).

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