Construction method of suction anchor socket

Abstract

The invention discloses a construction method of a suction anchor socket, and relates to the field of deep sea engineering. The construction method of the suction anchor socket comprises the following specific steps: S1, prefabricating the short-section box beam; S2, prefabricating the long-section box beam; s3, backstops are prefabricated, wherein the backstops comprise type I load-bearing stool prefabrication, type II load-bearing stool prefabrication and type III load-bearing stool prefabrication; s4, prefabricating a bolt; s5, prefabricating and mounting an anti-floating locking support; and S6, final assembly. According to the construction method of the suction anchor socket, the construction process is subdivided into a plurality of key steps of prefabrication of the short-section box beam, prefabrication of the long-section box beam, prefabrication of the backstop, prefabrication of the plug pin, prefabrication of the anti-floating locking support and installation, and accurate matching of all the components and stability of the whole structure are ensured. According to the construction method, the construction quality and the size precision of the suction anchor socket are ensured by accurately controlling the construction process, defining the technical requirements and optimizing tolerance management, meanwhile, the installation efficiency is improved, and the construction period is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of deep sea engineering, and in particular to a construction method of a suction anchor socket. Background Art

[0002] In the field of deep-sea engineering, suction anchors, as an important form of foundation structure, are widely used to fix offshore platforms, wind turbine bases and other heavy marine structures. Suction anchors use their unique sinking mechanism - using the principle of negative pressure to sink the anchor body into the soil layer at a predetermined depth on the seabed, thereby providing strong pull-out resistance and horizontal bearing capacity. The suction anchor socket, as a key component connecting the superstructure and the suction anchor, is directly related to the stability of the entire structure and the safety of long-term operation.

[0003] Traditional suction anchor socket construction mostly adopts on-site welding and manual assembly. This method not only has a long construction period and low efficiency, but also makes it difficult to ensure the precise matching between the components and the stability of the overall structure. In addition, due to the complexity of the marine environment, such as high salinity, strong corrosion, strong winds and waves and other harsh conditions, extremely high requirements are placed on the corrosion resistance, fatigue resistance and installation accuracy of the suction anchor socket. For this reason, we propose a construction method for the suction anchor socket. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention subdivides its construction process into multiple key steps, including prefabrication of short-section box beams, prefabrication of long-section box beams, prefabrication of stops, prefabrication of pins, prefabrication of anti-floating locking supports and installation, and ensures the precise fit between the various components and the stability of the overall structure. This method ensures the construction quality and dimensional accuracy of the suction anchor socket by precisely controlling the construction process, clarifying technical requirements, and optimizing tolerance management, while improving installation efficiency and shortening the construction period.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A construction method of a suction anchor socket, comprising the following specific steps:

[0006] S1. Prefabrication of short-section box beams: Determine the assembly and welding sequence of the web plate, upper and lower flanges and rib plates on one side of the short-section box beam, then determine the position of the internal rib plates on the cover plate, and finally assemble and weld the web plate on the other side;

[0007] S2. Prefabrication of long-section box beams: The prefabrication of long-section box beams adopts the reverse manufacturing method, adding cross braces and temporary supports above the end openings, punching measurement points on the upper flange plate before welding, and measuring the horizontality of the top of the box before and after welding;

[0008] S3. Stopper prefabrication: The stopper includes type I load-bearing stool prefabrication, type II load-bearing stool prefabrication and type III load-bearing stool prefabrication;

[0009] S4. Prefabrication of pins: There are four pins in the socket, and the construction order is the same. The pin handle sleeves on both sides are mirror images. The pins are prefabricated by machine first, and then batch machining is performed after the handles are confirmed to be compatible.

[0010] S5. Prefabrication and installation of anti-floating locking supports: Determine the prefabrication and installation of anti-floating locking supports. There are four anti-floating locking supports in total, which are divided into two types, namely type I anti-floating locking supports and type II anti-floating locking supports. The anti-floating locking supports need to be installed with latches and installed as a whole on the stopper;

[0011] S6. Final assembly: Assemble the short-section box beam, long-section box beam, stoppers, latches and anti-floating locking supports.

[0012] Preferably, the specific construction method of step S1 is as follows:

[0013] S101, the web plate and the lower flange plate are assembled but not welded yet;

[0014] S102, determine the position of the rib plate, the rib plate needs to have welding holes opened, but no welding is done for the time being;

[0015] S103, assemble the upper flange plate, web plate and rib plate, but do not weld them temporarily;

[0016] S104, after the parts are assembled, welding is performed. First, the web plate is welded to the lower flange plate and the upper flange plate, then the rib plate is welded to the upper flange plate and the lower flange plate, and finally the rib plate is welded to the web plate;

[0017] S105. Draw lines on the cover plate, mark the position of the internal ribs, and mark the buffer points;

[0018] S106. Assemble and weld the disconnected web on the other side. First, weld the upper and lower flanges of the web and then weld it to the rib plate. To ensure the overall assembly accuracy, only spot weld the webs at both ends.

[0019] Preferably, the specific construction method of the reverse construction method in step S2 is as follows:

[0020] S201, using the reverse manufacturing method, the upper flange plate, web plate and rib plate are only assembled but not welded. To ensure parallelism, a temporary cross brace is added above the end opening, and then a rib plate inside is welded. This rib plate has a permanent through-welding hole and is not blocked. After assembly, the three-side welding work is completed and NDT inspection is carried out;

[0021] S202, assemble the lower flange plate, web plate and rib plate;

[0022] S203. After the assembly is completed, turn over and add temporary supports to the upper and lower flanges of one side of the unreinforced plate to prevent deformation;

[0023] S204. After turning over, first mark the position of the internal ribs, weld the last weld and perform NDT inspection, then weld the web, and weld from the middle to both ends. Before welding, punch four sample measurement points on the upper flange plate. Before and after welding, measure the horizontality of the top of the box body, and ensure a tolerance of less than 5mm. Finally, weld the external ribs and end plate ribs.

[0024] Preferably, the specific construction method of step S3 is as follows:

[0025] S301, Type I load-bearing stool prefabrication, first assemble the web plate and cover plate, then assemble the two side flanges, and then assemble the rib plate. The rib plate needs to be pre-opened with welding holes, and finally the whole is welded, first weld the web plate and cover plate, then weld the flange plate, and finally weld the rib plate;

[0026] S302, Type II load-bearing bench prefabrication, first assemble the side plate and the web plate, then assemble the two side rib plates, the rib plates need to be opened with welding holes in advance, first weld the side plate and the web plate, then weld all the rib plates, then assemble the top plate and the inclined plate, and finally weld the whole, first weld the web plate, then weld the flange plate joints, and finally weld the rib plates;

[0027] S303, Type III load-bearing stool prefabrication, assemble the side plates and web plates, assemble two pairs of stiffener plates, assemble the top plate and inclined plate, and finally assemble the third pair of stiffener plates, first weld the web plates, then weld the flange plate joints, the top plate and the inclined plate, and finally weld the stiffener plates.

[0028] Preferably, the latch in step S4 is composed of a safety pin, a safety pin limit block, a safety pin sleeve cover plate, a safety pin sleeve, a baffle, a locking pin, a locking pin limit block and a locking pin sleeve, and the specific construction method of step S4 is as follows:

[0029] S401, cutting materials, bending the handle, machining holes and slotting the locking pin sleeve, locking pin and safety pin sleeve according to theoretical values, and adding a 3mm margin on the non-slotted end when cutting the sleeve;

[0030] S402, test machined parts.

[0031] Preferably, the specific processing flow of step S4 is:

[0032] a. Spot weld the locking pin limit block and push it into the sleeve to fit;

[0033] b. Spot weld the baffle or clamp it with tooling;

[0034] c. Adjust the baffle position, pull out all the locking pins, and the safety pin can pass through smoothly;

[0035] d. Push the locking pin in completely and the safety pin can pass through smoothly, indicating that the hole position is correct;

[0036] e. Spot welding of the safety pin sleeve must ensure verticality, insert the safety pin after welding to fit, and the safety pin must pass through the exposed length to a qualified standard;

[0037] f. Pull out the locking pin and fit the safety pin;

[0038] g. Locate the sleeve area, drill holes in the locking support, and assemble the spot welding sleeve after drilling the holes;

[0039] h. Push the locking pin to the bottom, insert the safety pin, check the actual position of the locking pin end face, confirm and cut off the sleeve excess, reassemble and weld the sleeve;

[0040] i. Confirm the gap between the baffles. Locking pins and safety pins must be used before and after welding.

[0041] j. Weld the latch limit block, latch handle, and sleeve cover.

[0042] Preferably, the step S6 is final assembly: determining the final assembly process, placing supports before final assembly, adjusting the angle to horizontal during the final assembly process, because the thickness of the steel plate at the joint between the long section box beam and the short section box beam is inconsistent, a transition is required during the construction process, and K-type supports are installed at both ends of the box to ensure the box spacing. Before and after welding, the spacing at both ends of the box and the overall horizontality need to be measured and meet the tolerance requirements, and finally the completed socket and cylinder are welded.

[0043] Preferably, the specific construction method of step S6 is as follows:

[0044] S601. Place supports, place box beams, set supports, measure buffer points when placing long-section box beams, and adjust the angle to horizontal;

[0045] S602, connect the box beam, place the short-section box beam at the end, level the whole, and slightly adjust the web at the connection to align the webs on both sides. First weld the web, then weld the cover plate and the bottom plate. The steel plate thickness at the joint of the long-section box beam and the short-section box beam is inconsistent, and the transition requirement of 1:4 must be met during the construction process;

[0046] S603. Assemble the frame, install the connecting bridge in the middle of the boxes on both sides, and install K-type supports at both ends. The K-type supports are welded and fixed to the wing plates and web plates on the box beam. Before and after welding the connecting bridge and the K-type supports, the distance between the two ends of the box and the overall levelness must be measured and meet the tolerance requirements. The tolerance of the levelness of the top surface of the box is controlled to be less than 5mm;

[0047] S604, assembling vertical support plates;

[0048] S605, assemble the guide plate and rib plate. The installation accuracy of the guide plate is relatively high. The tolerance of the vertical surface from the center axis needs to be controlled within 2 to 5 mm. After the assembly and adjustment dimensions are qualified, welding is temporarily stopped.

[0049] S606, welding, determining the welding sequence;

[0050] S607, installation type I anti-floating locking support;

[0051] S608, installation type III load-bearing stool;

[0052] S609, installation type II anti-floating locking support;

[0053] S610. Finally, the socket and the cylinder are welded.

[0054] The invention discloses a construction method of a suction anchor socket, which has the following beneficial effects:

[0055] 1. This method of construction of a suction anchor socket ensures the precise matching of the components and the stability of the overall structure by formulating detailed technical requirements and operating specifications. In addition, this method ensures the construction quality and dimensional accuracy of the suction anchor socket by precisely controlling the construction process, clarifying technical requirements, optimizing tolerance management, and adopting assembly technology, while improving installation efficiency and shortening the construction period;

[0056] 2. The construction method of this suction anchor socket, the standardized construction process and technical requirements can ensure the construction quality and construction accuracy, improve the economy of the project, and provide new technical ideas and solutions for the construction of deep-sea suction anchor sockets by detailed specifications of the prefabrication processes of short-section box beams, long-section box beams, stops, pins, anti-floating locking supports, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0058] Figure 1 It is a flow chart of the present invention;

[0059] Figure 2 The prefabrication process of the short-section box beam of the present invention;

[0060] Figure 3 This is the prefabrication process of the long-section box beam of the present invention;

[0061] Figure 4 This is a flow chart for prefabrication of a type I load-bearing stool of the present invention;

[0062] Figure 5 This is a flow chart for prefabrication of type II load-bearing stools of the present invention.

[0063] Figure 6 This is a flow chart for prefabrication of type III load-bearing stools of the present invention.

[0064] Figure 7 This is a flowchart of the bolt decomposition and prefabrication of the present invention.

[0065] Figure 8 This is a decomposition and prefabrication flow chart of the anti-floating locking support (type I) of the present invention.

[0066] Fig. 9 This is a decomposition and prefabrication flow chart of the anti-floating locking support (type II) of the present invention.

[0067] Fig.10 It is the general assembly flow chart of the present invention.

[0068] Fig.11 It is a schematic diagram of the socket structure of the present invention.

[0069] In the figure: 1. latch; 2. stopper; 3. mounting ear shaft guide; 4. anti-floating locking support; 5. connecting bridge; 6. guide plate. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0071] The embodiment of the present application provides a construction method for a suction anchor socket, which solves the problems of long construction period, low efficiency, and difficulty in ensuring precise fit between components and stability of the overall structure. The construction process is subdivided into multiple key steps of prefabrication of short-section box beams, prefabrication of long-section box beams, prefabrication of stoppers 2, prefabrication of pins 1, prefabrication of anti-floating locking supports 4, and installation, and the precise fit between components and stability of the overall structure are ensured. The method ensures the construction quality and dimensional accuracy of the suction anchor socket by accurately controlling the construction process, clarifying technical requirements, and optimizing tolerance management, while improving installation efficiency and shortening the construction period.

[0072] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0073] The embodiment of the invention discloses a construction method of a suction anchor socket.

[0074] According to the attached Figure 1 -11, including the following specific steps:

[0075] S1. Prefabrication of short-section box beams: Determine the assembly and welding sequence of the web plate, upper and lower flanges and rib plates on one side of the short-section box beam, then draw lines on the cover plate, mark the position of the internal rib plates, mark the buffer points, and finally assemble and weld the web plate on the other side;

[0076] S2. Prefabrication of long-section box beams: Determine the construction process of long-section box beams. The prefabrication adopts the reverse manufacturing method. In the prefabrication process, it is necessary to add cross braces and temporary supports above the end openings to ensure parallelism. Four sample punching measurement points are punched on the upper flange plate before welding. The horizontality of the top of the box needs to be measured before and after welding to ensure a tolerance of less than 5mm.

[0077] S3, stop 2 prefabrication: stop 2 includes type I load-bearing stool prefabrication, type II load-bearing stool prefabrication and type III load-bearing stool prefabrication;

[0078] S4, prefabrication of plug 1: There are four plugs 1 in the socket, and the construction order is the same. The plug handle sleeves on both sides are mirror images. The plug 1 is prefabricated by machining first, and then batch machining is performed after the handles are confirmed to be compatible;

[0079] S5. Prefabrication and installation of anti-floating locking support 4: Determine the prefabrication and installation of anti-floating locking support 4. There are four anti-floating locking supports 4, which are divided into two types, namely type I anti-floating locking support and type II anti-floating locking support. The anti-floating locking support 4 needs to be installed with a latch 1 and is installed as a whole on the stopper 2.

[0080] S6. Final assembly: Determine the final assembly process, place supports before final assembly, and adjust the angle to horizontal during the final assembly process. Since the thickness of the steel plate at the joint of the long-section box beam and the short-section box beam is inconsistent, a transition is required during the construction process. To ensure the box spacing, K-type supports are installed at both ends of the box. Before and after welding, the spacing at both ends of the box and the overall horizontality must be measured and meet the tolerance requirements. Finally, the completed socket and cylinder are welded.

[0081] According to the attached Figure 2 As shown, the specific construction method of step S1 is as follows:

[0082] S101, the web plate and the lower flange plate are assembled but not welded yet;

[0083] S102, determine the position of the rib plate, the rib plate needs to have welding holes opened, but no welding is done for the time being;

[0084] S103, assemble the upper flange plate, web plate and rib plate, but do not weld them temporarily;

[0085] S104, after the parts are assembled, welding is performed. First, the web plate is welded to the lower flange plate and the upper flange plate, then the rib plate is welded to the upper flange plate and the lower flange plate, and finally the rib plate is welded to the web plate;

[0086] S105. Draw lines on the cover plate, mark the position of the internal ribs, and mark the buffer points;

[0087] S106. Assemble and weld the disconnected web on the other side. First, weld the upper and lower flanges of the web and then weld it to the rib plate. To ensure the overall assembly accuracy, only spot weld the webs at both ends.

[0088] According to the attached Figure 3 As shown, the specific construction method of step S2 is as follows:

[0089] S201, using the reverse manufacturing method, the upper flange plate, web plate and rib plate are only assembled but not welded. To ensure parallelism, a temporary cross brace is added above the end opening, and then a rib plate inside is welded. This rib plate has a permanent through-welding hole and is not blocked. After assembly, the three-side welding work is completed and NDT inspection is carried out;

[0090] S202, assemble the lower flange plate, web plate and rib plate;

[0091] S203. After the assembly is completed, turn over and add temporary supports to the upper and lower flanges of one side of the unreinforced plate to prevent deformation;

[0092] S204. After turning over, first mark the position of the internal ribs, weld the last weld and perform NDT inspection, then weld the web, and weld from the middle to both ends. Before welding, punch four sample measurement points on the upper flange plate. Before and after welding, measure the horizontality of the top of the box body, and ensure a tolerance of less than 5mm. Finally, weld the external ribs and end plate ribs.

[0093] According to the attached Figures 4 to 6 As shown, the specific construction method of step S3 is as follows:

[0094] S301, Type I load-bearing stool prefabrication, first assemble the web plate and cover plate, then assemble the two side flanges, and then assemble the rib plate. The rib plate needs to be pre-opened with welding holes, and finally the whole is welded, first weld the web plate and cover plate, then weld the flange plate, and finally weld the rib plate;

[0095] S302, Type II load-bearing bench prefabrication, first assemble the side plate and the web plate, then assemble the two side rib plates, the rib plates need to be opened with welding holes in advance, first weld the side plate and the web plate, then weld all the rib plates, then assemble the top plate and the inclined plate, and finally weld the whole, first weld the web plate, then weld the flange plate joints, and finally weld the rib plates;

[0096] S303, Type III load-bearing stool prefabrication, assemble the side plates and web plates, assemble two pairs of stiffener plates, assemble the top plate and inclined plate, and finally assemble the third pair of stiffener plates, first weld the web plates, then weld the flange plate joints, the top plate and the inclined plate, and finally weld the stiffener plates.

[0097] According to the attached Figure 7As shown, in step S4, the latch 1 is composed of a safety pin, a safety pin limit block, a safety pin sleeve cover plate, a safety pin sleeve, a baffle, a locking pin, a locking pin limit block and a locking pin sleeve. The specific construction method of step S4 is as follows:

[0098] S401, cutting materials, bending the handle, machining holes and slotting the locking pin sleeve, locking pin and safety pin sleeve according to theoretical values, and adding a 3mm margin on the non-slotted end when cutting the sleeve;

[0099] S402, test machined parts.

[0100] Furthermore, the specific processing flow of step S4 is as follows:

[0101] a. Spot weld the locking pin limit block and push it into the sleeve to fit;

[0102] b. Spot weld the baffle or clamp it with tooling;

[0103] c. Adjust the baffle position, pull out all the locking pins, and the safety pin can pass through smoothly;

[0104] d. Push the locking pin in completely and the safety pin can pass through smoothly, indicating that the hole position is correct;

[0105] e. Spot welding of the safety pin sleeve must ensure verticality, insert the safety pin after welding to fit, and the safety pin must pass through the exposed length to a qualified standard;

[0106] f. Pull out the locking pin and fit the safety pin;

[0107] g. Locate the sleeve area, drill holes in the locking support, and assemble the spot welding sleeve after drilling the holes;

[0108] h. Push the locking pin to the bottom, insert the safety pin, check the actual position of the locking pin end face, confirm and cut off the sleeve excess, reassemble and weld the sleeve;

[0109] i. Confirm the gap between the baffles. Locking pins and safety pins must be used before and after welding.

[0110] j. Weld the limit block of latch 1, handle of latch 1, and sleeve cover.

[0111] According to the attached Figures 8-9 As shown, the specific construction method of step S5 is as follows:

[0112] S501, Type I anti-floating locking bearing prefabrication;

[0113] S502, Type II anti-floating locking bearing prefabrication.

[0114] Furthermore, the specific processing flow of S501 is as follows:

[0115] a. Assemble the webs and fix them with temporary structures to ensure the spacing and verticality are qualified;

[0116] b. Install the wing plate and weld the web plate and wing plate;

[0117] c. Use the pin sleeve to confirm the opening position;

[0118] d. Spot weld the pin sleeve after opening the hole;

[0119] e. Install latch 1;

[0120] f. Install the reinforcing rib plate;

[0121] g. Prefabricated trunnion guide support;

[0122] h. Install the trunnion guide 3 support;

[0123] i. Install the guide plate 6;

[0124] The specific processing flow of S502 is as follows:

[0125] a. Prefabricated large support;

[0126] b. When assembling the supports, the distance between the two plates must be 80mm, and the tolerance must be kept within 0~+2;

[0127] c. Use the pin sleeve to confirm the opening area;

[0128] d. Through-hole opening and welding support;

[0129] e. Install latch 1;

[0130] f. Install the side panels;

[0131] g. Install the top plate.

[0132] According to the attached Fig.10 As shown, the specific construction method of step S6 is as follows:

[0133] S601. Place supports, place box beams, set supports, measure buffer points when placing long-section box beams, and adjust the angle to horizontal;

[0134] S602, connect the box beam, place the short-section box beam at the end, level the whole, and slightly adjust the web at the connection to align the webs on both sides. First weld the web, then weld the cover plate and the bottom plate. The steel plate thickness at the joint of the long-section box beam and the short-section box beam is inconsistent, and the transition requirement of 1:4 must be met during the construction process;

[0135] S603. Assemble the frame, install the connecting bridge 5 in the middle of the boxes on both sides, and install K-type supports at both ends. The K-type supports are welded and fixed to the flange and web of the box beam. Before and after welding the connecting bridge 5 and the K-type supports, the distance between the two ends of the box and the overall levelness must be measured and meet the tolerance requirements. The tolerance of the levelness of the top surface of the box is controlled to be less than 5mm.

[0136] S604, assembling vertical support plates;

[0137] S605, assemble the guide plate 6 and the rib plate. The installation accuracy of the guide plate 6 is required to be high. The tolerance of the vertical surface from the center axis needs to be controlled within 2 to 5 mm. After the assembly and adjustment dimensions are qualified, welding is temporarily stopped.

[0138] S606, welding, determining the welding sequence;

[0139] S607, installation type Ⅰ anti-floating locking support;

[0140] S608, installation type III load-bearing stool;

[0141] S609, installation type II anti-floating locking support;

[0142] S610. Finally, the socket and the cylinder are welded.

[0143] Furthermore, the specific processing flow of S606 is as follows:

[0144] a. Welding the vertical support plate welds;

[0145] b. Welding the weld between the guide plate 6 and the box body;

[0146] c. Welding ribs.

[0147] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A construction method for a suction anchor socket, characterized in that: The specific steps include: S1. Prefabrication of short-section box beams: Determine the assembly and welding sequence of the web plate, upper and lower flanges and rib plates on one side of the short-section box beam, then determine the position of the internal rib plates on the cover plate, and finally assemble and weld the web plate on the other side; S2. Prefabrication of long-section box beams: The prefabrication of long-section box beams adopts the reverse manufacturing method, adding cross braces and temporary supports above the end openings, punching measurement points on the upper flange plate before welding, and measuring the horizontality of the top of the box before and after welding; S3, stopper (2) prefabrication: stopper (2) includes type I load-bearing stool prefabrication, type II load-bearing stool prefabrication and type III load-bearing stool prefabrication; S4. Prefabrication of the plug (1): The socket has four plugs (1) in total, and the construction sequence is the same. The plug handle sleeves on both sides are mirror images. The plugs (1) are prefabricated by machining one set first, and then batch machining is performed after the handles are confirmed to be compatible. S5. Prefabrication and installation of anti-floating locking support (4): Determine the prefabrication and installation of anti-floating locking support (4). There are four anti-floating locking supports (4) in total, which are divided into two types, namely type I anti-floating locking supports and type II anti-floating locking supports. The anti-floating locking supports (4) need to be installed with latches (1) and are installed as a whole on the stopper (2); S6. General assembly: The short-section box beam, the long-section box beam, the stopper (2), the latch (1) and the anti-floating locking support (4) are generally assembled.

2. A construction method for a suction anchor socket according to claim 1, characterized in that: The specific construction method of step S1 is as follows: S101, the web plate and the lower flange plate are assembled but not welded yet; S102, determine the position of the rib plate, the rib plate needs to have welding holes opened, but no welding is done for the time being; S103, assemble the upper flange plate, web plate and rib plate, but do not weld them temporarily; S104, after the parts are assembled, welding is performed. First, the web plate is welded to the lower flange plate and the upper flange plate, then the rib plate is welded to the upper flange plate and the lower flange plate, and finally the rib plate is welded to the web plate; S105. Draw lines on the cover plate, mark the position of the internal ribs, and mark the buffer points; S106. Assemble and weld the disconnected web on the other side. First, weld the upper and lower flanges of the web and then weld it to the rib plate. To ensure the overall assembly accuracy, only spot weld the webs at both ends.

3. The construction method of a suction anchor socket according to claim 1, characterized in that: The specific construction method of the reverse construction method in step S2 is as follows: S201, using the reverse manufacturing method, the upper flange plate, web plate and rib plate are only assembled but not welded. To ensure parallelism, a temporary cross brace is added above the end opening, and then a rib plate inside is welded. This rib plate has a permanent through-welding hole and is not blocked. After assembly, the three-side welding work is completed and NDT inspection is carried out; S202, assemble the lower flange plate, web plate and rib plate; S203. After the assembly is completed, turn over and add temporary supports to the upper and lower flanges of one side of the unreinforced plate to prevent deformation; S204. After turning over, first mark the position of the internal ribs, weld the last weld and perform NDT inspection, then weld the web, and weld from the middle to both ends. Before welding, punch four sample measurement points on the upper flange plate. Before and after welding, measure the horizontality of the top of the box body, and ensure a tolerance of less than 5mm. Finally, weld the external ribs and end plate ribs.

4. The construction method of a suction anchor socket according to claim 1, characterized in that: The specific construction method of step S3 is as follows: S301, Type I load-bearing stool prefabrication, first assemble the web plate and cover plate, then assemble the two side flanges, and then assemble the rib plate. The rib plate needs to be pre-opened with welding holes, and finally the whole is welded, first weld the web plate and cover plate, then weld the flange plate, and finally weld the rib plate; S302, Type II load-bearing bench prefabrication, first assemble the side plate and the web plate, then assemble the two side rib plates, the rib plates need to be opened with welding holes in advance, first weld the side plate and the web plate, then weld all the rib plates, then assemble the top plate and the inclined plate, and finally weld the whole, first weld the web plate, then weld the flange plate joints, and finally weld the rib plates; S303, Type III load-bearing stool prefabrication, assemble the side plates and web plates, assemble two pairs of stiffener plates, assemble the top plate and inclined plate, and finally assemble the third pair of stiffener plates, first weld the web plates, then weld the flange plate joints, the top plate and the inclined plate, and finally weld the stiffener plates.

5. The construction method of a suction anchor socket according to claim 1, characterized in that: In step S4, the latch pin (1) is composed of a safety pin, a safety pin stop block, a safety pin sleeve cover plate, a safety pin sleeve, a baffle, a locking pin, a locking pin stop block and a locking pin sleeve. The specific construction method of step S4 is as follows: S401, cutting materials, bending the handle, machining holes and slotting the locking pin sleeve, locking pin and safety pin sleeve according to theoretical values, and adding a 3mm margin on the non-slotted end when cutting the sleeve; S402, test machined parts.

6. A construction method for a suction anchor socket according to claim 5, characterized in that: The specific processing flow of step S4 is as follows: a. Spot weld the locking pin limit block and push it into the sleeve to fit; b. Spot weld the baffle or clamp it with tooling; c. Adjust the baffle position, pull out all the locking pins, and the safety pin can pass through smoothly; d. Push the locking pin in completely and the safety pin can pass through smoothly, indicating that the hole position is correct; e. Spot welding of the safety pin sleeve must ensure verticality, insert the safety pin after welding to fit, and the safety pin must pass through the exposed length to a qualified standard; f. Pull out the locking pin and fit the safety pin; g. Locate the sleeve area, drill holes in the locking support, and assemble the spot welding sleeve after drilling the holes; h. Push the locking pin to the bottom, insert the safety pin, check the actual position of the locking pin end face, confirm and cut off the sleeve excess, reassemble and weld the sleeve; i. Confirm the gap between the baffles. Locking pins and safety pins must be used before and after welding. j. Weld the stopper of the latch (1), the handle of the latch (1), and the sleeve cover.

7. The construction method of a suction anchor socket according to claim 1, characterized in that: The specific construction method of step S5 is as follows: S501, Type I anti-floating locking bearing prefabrication; S502, Type II anti-floating locking bearing prefabrication.

8. The construction method of a suction anchor socket according to claim 1, characterized in that: The step S6 is general assembly: determine the general assembly process, place supports before general assembly, adjust the angle to horizontal during the general assembly process, because the thickness of the steel plate at the joint of the long section box beam and the short section box beam is inconsistent, a transition is required during the construction process, and K-type supports are installed at both ends of the box to ensure the box spacing. Before and after welding, the spacing at both ends of the box and the overall horizontality must be measured and meet the tolerance requirements, and finally the completed socket and cylinder are welded.

9. The construction method of a suction anchor socket according to claim 1, characterized in that: The specific construction method of step S6 is as follows: S601. Place supports, place box beams, set supports, measure buffer points when placing long-section box beams, and adjust the angle to horizontal; S602, connect the box beam, place the short-section box beam at the end, level the whole, and slightly adjust the web at the connection to align the webs on both sides. First weld the web, then weld the cover plate and the bottom plate. The steel plate thickness at the joint of the long-section box beam and the short-section box beam is inconsistent, and the transition requirement of 1:4 must be met during the construction process; S603, assemble the frame, install the connecting bridge (5) in the middle of the boxes on both sides, and install K-type supports at both ends. The K-type supports are welded and fixed to the flange and web of the box beam. Before and after welding the connecting bridge (5) and the K-type supports, the distance between the two ends of the box and the overall levelness must be measured and meet the tolerance requirements. The tolerance of the levelness of the top surface of the box is controlled to be less than 5mm. S604, assembling vertical support plates; S605, assembling the guide plate (6) and the rib plate. The guide plate (6) has a high installation accuracy requirement. The vertical surface single side distance tolerance of the center axis needs to be controlled within 2 to 5 mm. After the assembly and adjustment dimensions are qualified, welding is temporarily stopped. S606, welding, determining the welding sequence; S607, installation type Ⅰ anti-floating locking support; S608, installation type III load-bearing stool; S609, installation type II anti-floating locking support; S610. Finally, the socket and the cylinder are welded.

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