Axis rotation method and system for large-section immersed pipe segment in narrow dry dock

Abstract

This invention relates to the field of immersed tunnel technology, and in particular to a method and system for rotating the axis of a large-section immersed tunnel segment in a narrow dry dock. This rotation method is used to rotate an immersed tunnel segment whose axis is perpendicular to the dock exit axis until its axis is collinear with the dock exit axis. The method includes: cable installation within the dock; rotation within a first angle range; changing the rotation point; and exiting the dock after rotation to the correct position. This invention features a simple cable system arrangement; only one cable modification is required during the rotation process to achieve the correct tunnel rotation. After the modification, the cable system arrangement is the same as that during the dock exit process. No modification of the already connected cables is required during dock exit. The rotation control process is simple, greatly reducing manual labor and improving construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of immersed tube tunnels, and in particular to a method and system for rotating the axis of a large-section immersed tube segment in a narrow dry dock. Background Art

[0002] The construction of immersed tube tunnel is to transport the immersed tube prefabricated in the dry dock to the construction site on the sea or river surface, and sink it into the foundation trench section by section. In the early days of prefabricating immersed tubes in the dry dock, the directions of the two ends of the immersed tube were consistent with the installation direction of the immersed tube, and there was no need to perform turning operations in the dry dock.

[0003] For the situation that the two ends of the immersed tube are inconsistent with the installation direction of the immersed tube during prefabrication, Chinese patent CN117266244A discloses a method for turning around in a large immersed tube dock. When there is not enough space reserved in the deep dock area for turning around a large immersed tube, the immersed tube is turned and moved at multiple different points, and multiple cable additions, cable changes and cable releases are performed during the process to complete the turning operation of the large immersed tube. The positioning turning point needs to be replaced multiple times during the turning process, and in addition to the winch controlling the steel cable retraction and release during the lateral movement and turning process, the high-strength cable needs to be controlled by manual tailing to protect the immersed tube. The cable arrangement is extremely complicated, the steering process control is complicated, and a huge labor cost and time cost are required.

[0004] For inland river immersed tube tunnels, the length of a single immersed tube section is short, the cross-sectional dimensions are large, and the dry dock space is also narrow. In order to rationally utilize the space in the dock, multiple sections of immersed tubes are prefabricated simultaneously. For the sections whose axial direction of the prefabricated immersed tubes is inconsistent with their installation direction, they need to be turned after the other immersed tubes are undocking. Due to the limited space in the dry dock, during the rotation process, it is necessary to avoid collision between the immersed tube and the structure in the dry dock, and to avoid interference between the cable and the outfitting on the top of the immersed tube. Therefore, a method is needed to realize the rotation of the inland river immersed tube in the dry dock with a simple cable arrangement and a small number of cable changes. Summary of the invention

[0005] In view of the deficiencies in the above-mentioned prior art, the present invention provides a method and system for rotating the axis of a large-section immersed tube section in a narrow dry dock with a simple cable arrangement and capable of realizing the rotation of the immersed tube in a limited space.

[0006] A method for rotating the axis of a large-section immersed tube section in a narrow dry dock, which is used to rotate an immersed tube whose axis is perpendicular to the undocking axis until its axis is in line with the undocking axis, wherein one end of the immersed tube close to the dock door is the rear end of the immersed tube, and the other end of the immersed tube far from the dock door is the front end of the immersed tube;

[0007] The specific steps include:

[0008] Cable in dock:

[0009] The submerged tube is floated, and the front and rear ends of the submerged tube are respectively cabled to keep the submerged tube balanced;

[0010] Rotation within the first angle range:

[0011] The immersed tube is maintained in a cable-carrying state, with the fifth mooring post at the rear end of the immersed tube close to the dock door as the rotation center, the fifth mooring post is connected to a positioning control cable, the positioning control cable provides braking force for the immersed tube and controls the position of the fifth mooring post to remain unchanged;

[0012] The second mooring post at the front end of the immersed tube away from the dock door is the rotation point, and the first cable connected to the second mooring post provides traction in the rotation tangent direction for the immersed tube; the remaining cables cooperate to control the immersed tube to rotate counterclockwise to the first angle, and at the same time control the position of the tail end of the immersed tube to avoid interference with the dry dock;

[0013] Replace the pivot point and rotate it into place:

[0014] When the immersed tube continues to rotate from the first angle, the fifth mooring post continues to be the rotation center, and the rotation point is changed from the second mooring post to the fourth mooring post at the rear end of the immersed tube close to the dock door. The sixth cable connected to the fourth mooring post provides traction in the tangential direction of rotation for the immersed tube; the remaining cables cooperate to control the immersed tube to continue to rotate counterclockwise by 90°. At this time, the axis of the immersed tube is colinear with the undocking axis, and then the immersed tube undocking operation is carried out.

[0015] The method for rotating the axis of a large-section immersed tube segment in a narrow dry dock of the technical solution is that when the large-section immersed tube segment is rotated in a limited space, it only needs to rotate around a rotation center. The cable arrangement is simple, and the immersed tube can be rotated into place only by changing the position of the rotation point. The cable arrangement for the rotation of the immersed tube is the same as the cable arrangement for the undocking process. There is no need to change the existing connected cables during undocking. The rotation control process is simple, which greatly reduces the labor input and improves the construction efficiency.

[0016] In some embodiments of the present application, during the process of cable-carrying in the dock, the mooring posts on the four top corners of the immersed tube are connected to the winch in the dry dock:

[0017] The fourth mooring post at the front end of the immersed tube close to the dock door is connected to the sixth winch through the sixth cable, and the second mooring post at the front end of the immersed tube away from the dock door is connected to the first winch and the second winch through the first cable and the second cable respectively;

[0018] The fifth mooring post at the rear end of the immersed tube close to the dock door is connected to the positioning control winch through a positioning control cable, and the first mooring post at the rear end of the immersed tube away from the dock door is connected to the third winch and the fourth winch through the third cable and the fourth cable respectively.

[0019] In some embodiments of the present application, when the immersed tube is rotated to the first angle, in order to prevent the cables from interfering with the outfitting at the top of the immersed tube, some cables are re-routed: the third cable is connected from the first mooring post at the front end of the immersed tube to the fifth mooring post at the front end of the immersed tube, and after the re-routed, the third cable and the positioning control cable jointly control the position of the fifth mooring post to remain unchanged;

[0020] In order to maintain the stability of the rear end of the immersed tube, the second cable is connected from the second mooring bitt at the front end of the immersed tube to the first mooring bitt at the rear end of the immersed tube;

[0021] At this time, the second cable after cable modification, the third cable, the first cable, the fourth cable, the positioning control cable, and the sixth cable are the cable-carrying method when the immersed tube is undocking. There is no need to modify the above cables when the immersed tube is rotated into place and undocking.

[0022] In some embodiments of the present application, after the immersed tube is re-routed, when the distance between the fifth mooring post as the rotation center and the undocking axis is different from the distance between the rotation center and the undocking axis during undocking, the immersed tube is transversely moved in a direction perpendicular to the axis of the immersed tube, and after the transverse movement, the distance between the fifth mooring post and the undocking axis is equal to the distance between the fifth mooring post and the undocking axis during undocking;

[0023] Then continue to rotate 90° counterclockwise with the fifth mooring post as the rotation center and the fourth mooring post as the rotation point, so that the axis of the immersed tube is in line with the undocking axis.

[0024] In some embodiments of the present application, after the immersed tube is changed to a cable, the positioning control cable and the second cable are arranged in an eight-shaped pattern at the rear end of the immersed tube, and the immersed tube continues to rotate from the first angle. When the immersed tube is rotated to the second angle, the angle between the positioning control cable and the axis of the immersed tube is the same as the angle between the second cable and the axis of the immersed tube. The positioning control cable is released and the second cable is reeled in, and the length of the positioning control cable released is the same as the length of the second cable reeled in, and the undocking axis intersects with the axis of the immersed tube at the rear end of the immersed tube;

[0025] Then continue to rotate 90° counterclockwise with the fifth mooring post as the rotation center and the fourth mooring post as the rotation point, so that the axis of the immersed tube is in line with the undocking axis.

[0026] In some embodiments of the present application, before the immersed tube is rotated to the first angle for cable change, the second mooring post and the fourth mooring post at the front end of the immersed tube are connected to the first nylon cable and the second nylon cable respectively, and the first nylon cable and the second nylon cable are arranged in an eight-shaped pattern;

[0027] The first mooring post and the fifth mooring post at the rear end of the immersed tube are connected to the third nylon cable and the fourth nylon cable respectively, and the third nylon cable and the fourth nylon cable are arranged crosswise.

[0028] The first nylon cable, the second nylon cable, the third nylon cable and the fourth nylon cable make the cable arrangement at the front and rear ends of the immersed tube symmetrical, further ensuring the stability of the immersed tube during rotation.

[0029] In some embodiments of the present application, when rotating within the first angle range: the first cable reeling provides a main traction force in a tangential direction for the rotation of the front end of the immersed tube;

[0030] The second cable is released to provide a main braking force for the rotation of the immersed tube;

[0031] The third cable reeling in and the fourth cable releasing provide auxiliary braking force for the immersed tube;

[0032] The positioning control cable is in a tensioned state, controlling the position of the fifth mooring post to remain unchanged, while providing auxiliary braking force for the rotation of the immersed tube;

[0033] The sixth cable is reeled in to control the position of the front end of the immersed tube to prevent the front end of the immersed tube from colliding with the dry dock.

[0034] In some embodiments of the present application, when the immersed tube rotates counterclockwise to a third angle between the first angle and the second angle, the first nylon cable, the third nylon cable, and the fourth nylon cable are released, and the second nylon cable is retained;

[0035] When the immersed tube starts to rotate from the second angle, the second nylon cable is released, which is beneficial to controlling the position of the rear end of the immersed tube.

[0036] In some embodiments of the present application, during the process of continuing to rotate counterclockwise to the first angle, the sixth cable reeling provides a main traction force in a tangential direction for the rotation of the front end of the immersed tube;

[0037] The first cable is released to provide the main braking force for the rotation of the immersed tube;

[0038] The second cable is reeled in to provide auxiliary traction for the rotation of the immersed tube;

[0039] The fourth cable release provides auxiliary braking force for the immersed tube;

[0040] The third cable and the positioning control cable are in a tensioned state, controlling the position of the fifth mooring post to remain unchanged, while providing auxiliary braking force for the rotation of the immersed tube.

[0041] The present application also provides a system for rotating the axis of a large-section immersed tube section in a narrow dry dock, which rotates the immersed tube whose axis is perpendicular to the undocking axis until its axis is in line with the undocking axis, comprising:

[0042] A fifth mooring post is arranged at the rear end of the immersed tube near the dock door, a first mooring post opposite to the fifth mooring post is also arranged at the rear end of the immersed tube, a second mooring post and a fourth mooring post are arranged on both sides of the front end of the immersed tube, the first mooring post and the second mooring post are located on the side of the immersed tube away from the dock door, and the fourth mooring post and the fifth mooring post are located on the other side of the immersed tube close to the dock door;

[0043] a positioning control winch, which is arranged on a side wall of the dry dock near the rear end of the immersed tube, and is connected to the fifth mooring post through a positioning control cable, so as to provide braking force for the immersed tube and control the position of the fifth mooring post to remain unchanged;

[0044] a sixth winch, disposed on a side wall of the dry dock near the rear end of the immersed tube, near the dock door, the sixth winch being connected to the fourth bollard;

[0045] A first winch is disposed on the other side wall of the dry dock near the front end of the immersed tube, near the dock door, and the first winch is connected to the second mooring post;

[0046] A third winch is disposed on the rear wall of the dry dock away from the dock door and connected to the first mooring post or the fifth mooring post;

[0047] A second winch is arranged on the other side wall of the dry dock near the front end of the immersed tube and away from the dock door, and the second winch is connected to the second mooring post or the first mooring post;

[0048] a fourth winch, arranged on the rear wall of the dry dock away from the dock door, symmetrically distributed with the third winch on both sides of the tunnel axis, and connected to the first mooring post;

[0049] A measuring tower is provided at the rear end of the immersed tube, and the measuring tower is used to measure the position of the fifth mooring post in real time; force sensors are provided on the cables connecting each winch in the dry dock and the mooring post of the immersed tube, and the force sensors are used to measure the force of each cable during the rotation process so as to accurately control each cable.

[0050] Based on the above technical solution, the cable arrangement of the present invention is simple, and the immersed tube can be rotated into place only by changing the cable once during the rotation process. The cable arrangement after the cable change is the same as the cable arrangement during the undocking process. There is no need to change the connected cables during undocking. The rotation control process is simple, which greatly reduces the labor input and improves the construction efficiency.

[0051] The measuring tower can measure the position of the rotation center in real time so as to adjust the cable to ensure that the rotation center remains unchanged;

[0052] The force sensor can measure the force of the cable in real time, so that the immersed tube can maintain a stable rotation process in real time, improving the controllability and accuracy of the rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0054] Figure 1 It is a schematic diagram of the position distribution of the dry dock, the winch in the dry dock, and the immersed tube in the dry dock according to an embodiment of the present invention;

[0055] Figure 2 A schematic diagram of the structure of an immersed tube according to an embodiment of the present invention;

[0056] Figure 3 This is a schematic diagram of a floating cable according to an embodiment of the present invention;

[0057] Figure 4 This is a schematic diagram of the cable when the immersed tube according to an embodiment of the present invention is translated 10 meters westward;

[0058] Figure 5 This is a schematic diagram of the cable belt when the immersed tube is rotated 20 degrees according to an embodiment of the present invention;

[0059] Figure 6 This is a schematic diagram of the cable belt when the immersed tube is rotated 30 degrees according to one embodiment of the present invention;

[0060] Figure 7 This is a schematic diagram of the cable belt when the immersed tube is rotated 50 degrees according to one embodiment of the present invention;

[0061] Figure 8 A schematic diagram of an immersed tube according to an embodiment of the present invention when it moves in a direction perpendicular to the axis of the immersed tube;

[0062] Fig. 9 A schematic diagram of the distance between the fifth mooring post of an immersed tube and the undocking axis and the distance during undocking according to an embodiment of the present invention;

[0063] Fig.10 A schematic diagram of a cable belt when an immersed tube is rotated 75 degrees according to an embodiment of the present invention;

[0064] Fig.11 A schematic diagram of a cable belt when an immersed tube is rotated 75 degrees according to another embodiment of the present invention;

[0065] Fig.12 A schematic diagram of a cable belt when an immersed tube is rotated 86 degrees according to another embodiment of the present invention;

[0066] Fig.13 It is a structural schematic diagram of another embodiment of the present invention when the axis of the immersed tube and the undocking axis intersect at the tail end of the immersed tube;

[0067] Fig.14 This is a schematic diagram of the cable belt when the immersed tube according to the embodiment of the present invention is rotated 90 degrees;

[0068] Fig.15 Schematic diagram of the cable belt when the immersed tube begins to undocking according to an embodiment of the present invention

[0069] In the figure, 10, immersed tube; 11, rear end of immersed tube; 12, front end of immersed tube; 13, first mooring bitt; 14, fourth mooring bitt; 15, fifth mooring bitt; 16, second mooring bitt; 17, manhole; 18, third mooring bitt. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0071] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like 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 a limitation on the present invention.

[0072] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0073] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] The method for rotating the axis of a large-section immersed tube section in a narrow dry dock in this embodiment is used to rotate the immersed tube 10 perpendicular to the undocking axis by 90° until its axis is in line with the undocking axis, and the end of the immersed tube 10 close to the dock door is the rear end 11 of the immersed tube, and the other end of the immersed tube away from the dock door is the front end 12 of the immersed tube; Figure 2 As shown, a fifth mooring bitt 15 is arranged at the rear end 11 of the immersed tube near the dock gate, and a first mooring bitt 13 opposite to the fifth mooring bitt 15 is also arranged at the rear end 11 of the immersed tube, and a second mooring bitt 16 and a fourth mooring bitt 14 are arranged on both sides of the front end 12 of the immersed tube, respectively. The first mooring bitt 13 and the second mooring bitt 16 are located on the side of the immersed tube away from the dock gate, and the fourth mooring bitt 14 and the fifth mooring bitt 15 are located on the other side of the immersed tube close to the dock gate; a measuring tower is installed on one side of the rear end 11 of the immersed tube during the primary outfitting of the immersed tube, and the front end 12 of the immersed tube is the end of the GINA waterstop;

[0075] In this embodiment, the dry dock is an axis dry dock, the undocking axis is in line with the tunnel axis, and three sections of immersed tubes are prefabricated in the axis dry dock at the same time. Figure 1 As shown, the axes of two sections of the immersed tube are parallel to the undocking axis. The two sections are first winched out of the dock for installation, leaving space for the immersed tube perpendicular to the undocking axis to be rotated. When the immersed tube is rotated to be in line with the undocking axis, it can be directly undocking and transported to the installation position.

[0076] The immersed tube rotation specifically includes the following steps:

[0077] Cable in dock:

[0078] After the submerged tube 10 is floated, the front end 12 and the rear end 11 of the submerged tube are respectively cabled. Figure 3 As shown, the fourth mooring post 14 at the front end 12 of the immersed tube close to the dock door is connected to the sixth winch J6 in the dry dock through the sixth cable L6, and the second mooring post 16 at the front end 12 of the immersed tube away from the dock door is connected to the first winch J1 and the second winch J2 respectively through the first cable L1 and the second cable L2;

[0079] The fifth mooring post 15 at the rear end 11 of the immersed tube close to the dock door is connected to the positioning control winch J5 through the positioning control cable L5, and the first mooring post 13 at the rear end 11 of the immersed tube away from the dock door is connected to the third winch J3 and the fourth winch J4 through the third cable L3 and the fourth cable L4 respectively; at this time, the immersed tube remains balanced;

[0080] Due to the limited space in the dry dock, in this embodiment, since the front end 12 of the immersed tube is the end of the GINA waterstop, the GINA waterstop cannot collide with any of the GINA waterstops. During the rotation process, it is necessary to avoid interference between the GINA waterstop and the side wall, and sufficient safety space must be reserved at the front end of the immersed tube. Therefore, before the immersed tube is rotated, the immersed tube must be translated a certain distance toward the direction of the rear end 11 of the immersed tube, that is, westward. During the translation process, the fourth cable L4 and the positioning control cable L5 are tightened to provide traction for the immersed tube 10 to translate westward, the first cable L1 and the second cable L2 provide braking force, and the third cable L3 and the sixth cable L6 are loosened. Figure 4 As shown, in this embodiment, the immersed tube 10 is translated 10 m to the west;

[0081] Rotation within the first angle range:

[0082] The above-mentioned cable-belting state is maintained, and the fifth mooring post 15 at the rear end of the immersed tube is used as the rotation center. During the rotation process, it is only connected to one positioning control cable L5, and the positioning control cable L5 is in a tensioned state and remains motionless, providing auxiliary braking force for the immersed tube 10 and controlling the position of the fifth mooring post 15 to remain unchanged; the measuring tower at the manhole 17 at the rear end of the immersed tube measures the position of the fifth mooring post 15 in real time during the rotation process, and when the position of the fifth mooring post 15 changes, the cables are promptly controlled to reset the fifth mooring post 15;

[0083] At the front end 12 of the immersed tube, the second mooring post 16 away from the dock door is the rotation point, and the first cable L1 connected to the second mooring post 16 is reeled in to provide traction in the tangential direction when the immersed tube rotates counterclockwise; the second cable L2 connected to the second mooring post 16 is released to provide the main braking force for the rotation of the immersed tube;

[0084] The sixth cable L6 connected to the fourth mooring post 14 at the front end 12 of the immersed tube close to the dock gate is reeled in to control the position of the front end of the immersed tube to prevent the front end of the immersed tube from colliding with the dry dock and causing damage to the GINA waterstop; the second cable L2 and the sixth cable L6 are arranged in an "eight" shape to jointly control the position of the front end of the immersed tube.

[0085] The third cable L3 and the fourth cable L4 connected to the first mooring post 13 at the rear end 11 of the immersed tube provide auxiliary braking force for the immersed tube when the third cable L3 and the fourth cable L4 are released; the positioning control cable L5 and the fourth cable L4 are arranged in an eight-shaped pattern to jointly control the position of the rear end of the immersed tube.

[0086] In this embodiment, the first angle is 50°. Figure 5-Figure 7 The figure shows the position of the immersed tube when it rotates 20°, 30° and 50° counterclockwise. During the rotation process, the force sensors on each cable monitor the tension of the cable in real time.

[0087] Replace the pivot point and rotate it into place:

[0088] When the immersed tube 10 continues to rotate from the first angle of 50°, the fifth mooring post 15 is still used as the rotation center, and the rotation point is changed from the second mooring post 16 to the fourth mooring post 14 at the rear end of the immersed tube close to the dock door. The sixth cable L6 connected to the fourth mooring post 14 provides traction in the counterclockwise rotation tangential direction for the immersed tube;

[0089] like Figure 7 As shown, after the immersed tube rotates to the first angle of 50°, if it continues to rotate, the third cable L3 connected to the first mooring post 13 will interfere with the measuring tower on the manhole 17 at the rear end of the immersed tube, so the third cable L3 needs to be reconnected to the fifth mooring post 15; in order to increase the stability of the rear end 11 of the immersed tube, the second cable L2 is connected from the second mooring post 16 to the first mooring post 13;

[0090] Before changing the cable, the stability of the immersed tube needs to be maintained. Therefore, the second mooring bitt 16 and the fourth mooring bitt 14 at the front end 12 of the immersed tube are connected to the first nylon cable N11 and the second nylon cable N12 respectively. The first nylon cable N11 and the second nylon cable N12 are arranged in an eight-shaped pattern. The first mooring bitt and the fifth mooring bitt 15 at the rear end 11 of the immersed tube are connected to the third nylon cable N9 and the fourth nylon cable N10 respectively. The third nylon cable N9 and the fourth nylon cable N10 are arranged in a cross pattern.

[0091] The first nylon cable N11, the second nylon cable N12, the third nylon cable N9, and the fourth nylon cable N10 make the cables at the front and rear ends of the immersed tube symmetrically arranged, further ensuring the stability of the immersed tube during rotation;

[0092] Then, the cables are changed, and the second cable L2 is connected from the second mooring post 16 of the front end 12 of the immersed tube to the first mooring post 13 of the rear end 11 of the immersed tube; the third cable L3 is connected from the first mooring post 13 of the front end 12 of the immersed tube to the fifth mooring post 15 of the front end 12 of the immersed tube. After the cables are changed, the third cable L3 and the positioning control cable L5 jointly control the position of the fifth mooring post 15 to remain unchanged;

[0093] At this time, if Figure 7 As shown, the second cable L2, the third cable L3, the first cable L1, the fourth cable L4, the positioning control cable L5, and the sixth cable L6 after the cable modification are used as the cable-carrying method when the immersed tube is undocking. When the immersed tube is rotated to the right position to undocking, there is no need to modify the cables above;

[0094] After the cable change is completed, the immersed tube 10 continues to rotate from the first angle of 50°, and continues to use the fifth mooring post 15 as the rotation center. The rotation point is changed from the second mooring post 16 to the fourth mooring post 14 at the rear end of the immersed tube close to the dock door. The sixth cable L6 connected to the fourth mooring post 14 provides traction in the counterclockwise rotation tangential direction for the immersed tube. At the same time, the second nylon cable N12 connected to the fourth mooring post 14 is reeled in; the first cable L1 connected to the second mooring post 16 is released to provide the main braking force for the rotation of the immersed tube; at the same time, the first nylon cable N11 connected to the second mooring post 16 is released, and the first nylon cable N11 and the second nylon cable N12 jointly control the position of the front end 12 of the immersed tube;

[0095] The second cable L2 connected to the first mooring post 13 is reeled in to provide auxiliary traction for the rotation of the immersed tube; at the same time, the fourth cable L4 connected to the first mooring post 13 is released to provide auxiliary braking force for the immersed tube; the fourth nylon cable N10 connected to the first mooring post 13 is released;

[0096] The third cable L3 and the positioning control cable L5 connected to the fifth mooring post 15 are in a tensioned state, controlling the position of the fifth mooring post 15 to remain unchanged, while providing auxiliary braking force for the rotation of the immersed tube; the third nylon cable N9 connected to the fifth mooring post 15 is tensioned and remains stationary; the third nylon cable N9 and the fourth nylon cable N10 are cross-arranged to jointly control the position of the rear end of the immersed tube.

[0097] As an embodiment of the present application, Figure 8 As shown in FIG. 1 , the distance D between the fifth mooring post 15 as the rotation center and the undocking axis is different from the distance D' between the rotation center and the undocking axis during undocking. To facilitate the subsequent rotation to the right position for undocking, the immersed tube is transversely moved in a direction perpendicular to the axis of the immersed tube. After the transverse movement, the distance between the fifth mooring post 15 and the undocking axis is the distance D' between the fifth mooring post 15 and the undocking axis during undocking. Fig. 9 As shown; during the lateral movement, the positioning control cable L5, the sixth cable L6 is released, the third cable L3, the fourth cable L4 is reeled in, the second cable L2, the first cable L1 is reeled in, and the fifth mooring post 15 is controlled to move eastward in a direction perpendicular to the axis of the undocking.

[0098] Then continue to rotate 90° counterclockwise with the fifth mooring post 15 as the rotation center and the fourth mooring post 14 as the rotation point, so that the axis of the immersed tube is in line with the axis of the undocking, as shown in FIG. Fig.10 This is a schematic diagram of the embodiment of the immersed tube after the transverse movement, when the counterclockwise rotation to 75 degrees continues, and the counterclockwise rotation to 90 degrees continues. Fig.14 As shown, the axis of the immersed tube is colinear with the axis of the undocking.

[0099] In another embodiment of the present application, Fig.11As shown in FIG. 1 , after the immersed tube 10 is rerouted at the first angle of 50°, it continues to rotate counterclockwise to 75° with the fifth mooring post 15 as the rotation center and the fourth mooring post 14 as the rotation point. At this time, the angles of the sixth cable L6, the first cable L1, the positioning control cable L5, and the second cable L2 are too large to provide sufficient force for the immersed tube. In the subsequent rotation process, in order to enable the immersed tube to rotate, Fig.11 As shown, the first nylon cable N11, the third nylon cable N9, and the fourth nylon cable N10 are released, and the second nylon cable N12 is retained;

[0100] When rotating to the second angle of 86°, Fig.12 As shown in the figure, it can be seen that the positioning control cable L5 and the second cable L2 are arranged in an "eight" shape at the front end 12 of the immersed tube, and at this time, when the angle between the positioning control cable L5 and the axis of the immersed tube is the same as the angle between the second cable L2 and the axis of the immersed tube, the positioning control cable L5 is released, and the second cable L2 is reeled in, and the length of the positioning control cable L5 being released is the same as the length of the second cable L2 being reeled in, and the undocking axis intersects the axis of the immersed tube at the tail end of the immersed tube, as shown in FIG. Fig.13 As shown;

[0101] Then continue to rotate 90° counterclockwise with the fifth mooring post 15 as the rotation center and the fourth mooring post 14 as the rotation point. Fig.14 As shown, the axis of the immersed tube is colinear with the axis of the undocking.

[0102] See also Fig.15 When the immersed tube is undocking, the second nylon cable N12 is connected from the fourth mooring bollard 14 to the second mooring bollard 16, and then the fourth mooring bollard 14 is connected to the fifth nylon cable N13, and then the third mooring bollard 18 located on the axis of the immersed tube is connected to the traction winch on the opposite bank of the river channel through the traction cable L9, and the second nylon cable N12, the fifth nylon cable N13, and the traction cable L9 provide traction for the immersed tube to be undocking.

[0103] As another embodiment of the present invention, a rotation system in an inland river immersed tube dry dock is provided, which is used to rotate an immersed tube whose axis is perpendicular to the undocking axis until its axis is in line with the undocking axis, and specifically includes:

[0104] The rear end 11 of the immersed tube is close to the dock door side and the rear end 11 of the immersed tube is also provided with a first mooring post 13 opposite to the fifth mooring post 15. The front end 12 of the immersed tube is provided with a second mooring post 16 and a fourth mooring post 14 on both sides. In this embodiment, the first mooring post 13 and the second mooring post 16 are located on the side of the immersed tube away from the dock door, and the fourth mooring post 14 and the fifth mooring post 15 are located on the other side of the immersed tube close to the dock door.

[0105] The positioning control winch J5 is arranged on one side wall of the dry dock near the rear end 11 of the immersed tube. In this embodiment, the positioning control winch J5 is located on the west side wall and is connected to the fifth mooring post 15 through the positioning control cable L5 to provide braking force for the immersed tube and control the position of the fifth mooring post 15 to remain unchanged;

[0106] The sixth winch J6 is arranged on one side wall of the dry dock near the rear end of the immersed tube, near the dock door, and is connected to the fourth mooring post 14;

[0107] The first winch J1 is arranged on the other side wall of the dry dock near the front end of the immersed tube, near the dock door, and the first winch is connected to the second mooring post 16;

[0108] A third winch J3 is arranged on the rear wall of the dry dock away from the dock door, and the third winch J3 is connected to the first mooring post 13 at 0-50 degrees and to the fifth mooring post 15 at 50-75 degrees;

[0109] The second winch J2 is arranged at the other side wall of the dry dock near the front end of the immersed tube and away from the dock door. The second winch J2 is connected to the second mooring post 16 at 0-50 degrees and is connected to the first mooring post 13 at 50-75 degrees.

[0110] a fourth winch J4, which is arranged on the rear wall of the dry dock away from the dock door, and is symmetrically distributed with the third winch on both sides of the undocking axis, and is connected to the first mooring post;

[0111] A measuring tower is provided at the manhole 17 near the fifth mooring bitt 15 at the rear end 11 of the immersed tube. The measuring tower is used to measure the position of the fifth mooring bitt 15 in real time. Force sensors are provided on the cables connecting each winch in the dry dock to the mooring bits of the immersed tube. The force sensors are used to measure the force of each cable during the rotation process so as to accurately control each cable.

[0112] In this embodiment, the J1 and J2 winches are located on the east side of the dry dock, the J3 and J4 winches are located on the south side of the dry dock, and the J5 and J6 winches are located on the west side of the dry dock near the dock door;

[0113] There are also 13 cable guides in the axis dry dock, 2 cable guides are located outside the dry dock, and 2 mooring bollards. D represents the cable guide, and X represents the mooring bollard. The D3, D4, D5, and D6 cable guides are located on the east side of the dry dock, the D7 and D8 cable guides are located on the south side of the dry dock, the D9, D10, D11, and D12 cable guides are located on the west side of the dry dock, and the D14, D15, and D2 cable guides are located on the north side of the dry dock, that is, close to the dock door. D13 and D1 are located outside the dock door of the dry dock, and D14 and D15 are located on both sides of the dock door; the X1 and X2 mooring bollards are located on the inner side of the dock door.

[0114] The cable arrangement of the present invention is simple, and the immersed tube can be rotated into place only by changing the cable once during the rotation process. The cable arrangement after the cable change is the same as the cable arrangement during the undocking process. There is no need to change the connected cables during undocking. The rotation control process is simple, the labor input is greatly reduced, and the construction efficiency is improved.

[0115] The measuring tower can measure the position of the rotation center in real time so as to adjust the cable to ensure that the rotation center remains unchanged;

[0116] The force sensor can measure the force of the cable in real time, so that the immersed tube can maintain a stable rotation process in real time, improving the controllability and accuracy of the rotation.

[0117] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0118] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A method for rotating the axis of a large-section immersed pipe segment in a narrow dry dock, characterized in that: It is used to rotate the immersed tube whose axis is perpendicular to the undocking axis until its axis is in line with the undocking axis. The end of the immersed tube close to the dock gate is the rear end of the immersed tube, and the other end of the immersed tube away from the dock gate is the front end of the immersed tube: The specific steps include: Cable in dock: The submerged tube is floated, and the front and rear ends of the submerged tube are respectively cabled to keep the submerged tube balanced; Rotation within the first angle range: The immersed tube is maintained in a cable-carrying state, with the fifth mooring post at the rear end of the immersed tube close to the dock door as the rotation center, the fifth mooring post is connected to a positioning control cable, the positioning control cable provides braking force for the immersed tube and controls the position of the fifth mooring post to remain unchanged; The second mooring post at the front end of the immersed tube away from the dock door is the rotation point, and the first cable connected to the second mooring post provides traction in the rotation tangent direction for the immersed tube; the remaining cables cooperate to control the immersed tube to rotate counterclockwise to the first angle, and at the same time control the position of the tail end of the immersed tube to avoid interference with the dry dock; Replace the pivot point and rotate it into place: When the immersed tube continues to rotate from the first angle, the fifth mooring post is continued as the rotation center, and the rotation point is changed from the second mooring post to the fourth mooring post at the rear end of the immersed tube close to the dock door, and the sixth cable connected to the fourth mooring post provides traction in the rotation tangent direction for the immersed tube; the remaining cables cooperate to control the immersed tube to continue to rotate counterclockwise by 90°, at which time the axis of the immersed tube is in line with the undocking axis, and then the immersed tube undocking operation is performed; During the process of cable-carrying in the dock: the fourth mooring post at the front end of the immersed tube close to the dock door is connected to the sixth winch through the sixth cable, and the second mooring post at the front end of the immersed tube away from the dock door is connected to the first winch and the second winch through the first cable and the second cable respectively; The fifth mooring post at the rear end of the immersed tube close to the dock door is connected to the positioning control winch through the positioning control cable, and the first mooring post at the rear end of the immersed tube away from the dock door is connected to the third winch and the fourth winch through the third cable and the fourth cable respectively; When the immersed tube is rotated to the first angle, in order to prevent the cables from interfering with the outfitting at the top of the immersed tube, some cables are re-routed: the third cable is connected from the first mooring post at the front end of the immersed tube to the fifth mooring post at the front end of the immersed tube. After the re-routed, the third cable and the positioning control cable jointly control the position of the fifth mooring post to remain unchanged; In order to maintain the stability of the rear end of the immersed tube, the second cable is connected from the second mooring bitt at the front end of the immersed tube to the first mooring bitt at the rear end of the immersed tube; At this time, the second cable after the cable change, the third cable, the first cable, the fourth cable, the positioning control cable, and the sixth cable are used as the cable-bearing method when the immersed tube is undocking. When the immersed tube is rotated to the right position to undocking, there is no need to change the cables above; After the immersed tube is re-routed, when the distance between the fifth mooring post as the rotation center and the undocking axis is different from the distance between the rotation center and the undocking axis during undocking, the immersed tube is transversely moved in a direction perpendicular to the axis of the immersed tube, and after the transverse movement, the distance between the fifth mooring post and the undocking axis is equal to the distance between the fifth mooring post and the undocking axis during undocking; Then continue to rotate 90° counterclockwise with the fifth mooring post as the rotation center and the fourth mooring post as the rotation point, so that the axis of the immersed tube is in line with the undocking axis.

2. The method for rotating the axis of a large-section immersed pipe segment in a narrow dry dock according to claim 1, characterized in that: After the immersed tube is changed to a cable, the positioning control cable and the second cable are arranged in an eight-shaped pattern at the rear end of the immersed tube, and the immersed tube continues to rotate from the first angle. When the immersed tube rotates to the second angle, the angle between the positioning control cable and the axis of the immersed tube is the same as the angle between the second cable and the axis of the immersed tube. The positioning control cable is released and the second cable is reeled in. The length of the positioning control cable released is the same as the length of the second cable reeled in. The undocking axis intersects the axis of the immersed tube at the rear end of the immersed tube. Then continue to rotate 90° counterclockwise with the fifth mooring post as the rotation center and the fourth mooring post as the rotation point, so that the axis of the immersed tube is in line with the undocking axis.

3. The method for rotating the axis of a large-section immersed pipe segment in a narrow dry dock according to claim 2, characterized in that: When the immersed tube is rotated to the first angle before changing the cable, the second mooring post and the fourth mooring post at the front end of the immersed tube are connected to the first nylon cable and the second nylon cable respectively, and the first nylon cable and the second nylon cable are arranged in an eight-shaped pattern; The first mooring post and the fifth mooring post at the rear end of the immersed tube are connected to the third nylon cable and the fourth nylon cable respectively, and the third nylon cable and the fourth nylon cable are arranged crosswise. The first nylon cable, the second nylon cable, the third nylon cable and the fourth nylon cable make the cable arrangement at the front and rear ends of the immersed tube symmetrical, further ensuring the stability of the immersed tube during rotation.

4. The method for rotating the axis of a large-section immersed pipe segment in a narrow dry dock according to claim 3, characterized in that: When rotating within the first angle range: the first cable is reeled in to provide the main traction force in the tangential direction for the rotation of the front end of the immersed tube; The second cable is released to provide a main braking force for the rotation of the immersed tube; The third cable reeling in and the fourth cable releasing provide auxiliary braking force for the immersed tube; The positioning control cable is in a tensioned state, controlling the position of the fifth mooring post to remain unchanged, while providing auxiliary braking force for the rotation of the immersed tube; The sixth cable is reeled in to control the position of the front end of the immersed tube to prevent the front end of the immersed tube from colliding with the dry dock.

5. The method for rotating the axis of a large-section immersed pipe segment in a narrow dry dock according to claim 3, characterized in that: When the immersed tube rotates counterclockwise to a third angle between the first angle and the second angle, the first nylon cable, the third nylon cable, and the fourth nylon cable are released, and the second nylon cable is retained; When the immersed tube starts to rotate from the second angle, the second nylon cable is released, which is beneficial to controlling the position of the rear end of the immersed tube.

6. The method for rotating the axis of a large-section immersed pipe segment in a narrow dry dock according to claim 5, characterized in that: During the process of continuing to rotate counterclockwise to the first angle, the sixth cable reeling provides a main traction force in a tangential direction for the rotation of the front end of the immersed tube; The first cable is released to provide the main braking force for the rotation of the immersed tube; The second cable is reeled in to provide auxiliary traction for the rotation of the immersed tube; The fourth cable release provides auxiliary braking force for the immersed tube; The third cable and the positioning control cable are in a tensioned state, controlling the position of the fifth mooring post to remain unchanged, while providing auxiliary braking force for the rotation of the immersed tube.

7. A system for rotating the axis of a large-section immersed tube segment in a narrow dry dock, using the method for rotating the axis of a large-section immersed tube segment in a narrow dry dock as described in any one of claims 1 to 6, to rotate the immersed tube whose axis is perpendicular to the undocking axis until its axis is in line with the undocking axis, characterized in that: include: A fifth mooring post is arranged at the rear end of the immersed tube near the dock door, a first mooring post opposite to the fifth mooring post is also arranged at the rear end of the immersed tube, a second mooring post and a fourth mooring post are arranged on both sides of the front end of the immersed tube, the first mooring post and the second mooring post are located on the side of the immersed tube away from the dock door, and the fourth mooring post and the fifth mooring post are located on the other side of the immersed tube close to the dock door; a positioning control winch, which is arranged on a side wall of the dry dock near the rear end of the immersed tube, and is connected to the fifth mooring post through a positioning control cable, so as to provide braking force for the immersed tube and control the position of the fifth mooring post to remain unchanged; a sixth winch, disposed on a side wall of the dry dock near the rear end of the immersed tube, near the dock door, the sixth winch being connected to the fourth bollard; A first winch is disposed on the other side wall of the dry dock near the front end of the immersed tube, near the dock door, and the first winch is connected to the second mooring post; A third winch is disposed on the rear wall of the dry dock away from the dock door and connected to the first mooring post or the fifth mooring post; A second winch is arranged on the other side wall of the dry dock near the front end of the immersed tube and away from the dock door, and the second winch is connected to the second mooring post or the first mooring post; a fourth winch, arranged on the rear wall of the dry dock away from the dock door, symmetrically distributed with the third winch on both sides of the tunnel axis, and connected to the first mooring post; A measuring tower is provided at the rear end of the immersed tube, and the measuring tower is used to measure the position of the fifth mooring post in real time; force sensors are provided on the cables connecting each winch in the dry dock and the mooring post of the immersed tube, and the force sensors are used to measure the force of each cable during the rotation process so as to accurately control each cable.

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