A method for erecting and splicing scaffolding for the side deck of an LNG ship

Abstract

The purpose of the present invention is to provide a method for erecting scaffolding and splicing construction of sections of the side deck of an LNG ship. The scaffolding erection includes the following steps: S1) erecting difficult scaffolding for starting construction of sections; S2) erecting scaffolding for starting construction of sections; S3) erecting scaffolding for acceptance before welding of sections; S4) erecting scaffolding for section removal; S5) erecting scaffolding for acceptance of section structure; S6) erecting scaffolding for acceptance of section integrity. The present invention is based on the construction sequence and acceptance requirements of the side deck sections, and adopts a step-by-step erection method. The scaffolding erection and section construction are carried out simultaneously to ensure the continuous construction of the side deck sections, improve the efficiency of the side deck section construction, avoid cross-operation in the same area vertically on the production site, prevent production chaos, ensure the construction period of the side deck sections, and improve the construction efficiency of the side deck sections of LNG ships.

Description

Technical Field

[0001] The invention relates to the technical field, and in particular to a method for erecting and splicing segmented scaffolding for a side top deck of an LNG ship. Background Art

[0002] The construction process of LNG ships must meet the requirements of the safety management and control system. In the segmented construction, the shipowner has very high requirements for the segmented scaffolding. During the operation, scaffolding must be erected according to the segmented construction process, and the scaffolding and construction personnel must not cross-operate in the vertical space.

[0003] The sheer deck section is the section of the liquid cargo tank area of ​​the LNG ship. Improving the construction efficiency of the sheer deck section is the main way to improve the construction efficiency of LNG ships. The construction method of the sheer deck section is complicated, there are many inspection links, and the demand for scaffolding is large. The progress of the section construction and scaffolding does not match, resulting in many cases of waiting for the section construction. There will be cross-operation between scaffolding and section construction, resulting in low efficiency of section construction and poor safety on the construction site.

[0004] In view of the above situation, in order to meet the construction progress of LNG ships and ensure that the scaffolding is safe for construction workers, it is necessary to carry out the step-by-step erection method of LNG side decks. The segmented construction dispatch is combined with the step-by-step erection of scaffolding to avoid longitudinal cross-operation. The segmented construction and scaffolding erection can be carried out simultaneously. The scaffolding erection method of LNG ship side decks is based on the construction sequence and acceptance requirements of the side deck segments. The step-by-step erection method is adopted. The scaffolding erection and segmented construction are carried out simultaneously to ensure the continuous construction of the side deck segments, improve the efficiency of the side deck segment construction, avoid longitudinal cross-operation in the same area of ​​the production site, prevent production chaos, ensure the construction cycle of the side deck segments, and improve the efficiency of the LNG ship side deck segment construction. Summary of the invention

[0005] The purpose of the present invention is to provide a method for erecting scaffolding in sections and a method for splicing and constructing the side deck of an LNG ship, so as to solve the problem that the scaffolding erection in the section construction process of the side deck does not meet the section progress, resulting in low section construction efficiency.

[0006] In order to achieve the above object, the technical solution of the present invention is:

[0007] A method for erecting scaffolding of a LNG ship's side deck in sections, used to assist in the construction of LNG ship's side deck in sections, the LNG ship's side deck comprises a sequentially spliced ​​section A, section C and section B, wherein the C section comprises a first splicing side, a second splicing side, a first butt joint side, a third splicing side and a second butt joint side, the A section comprises a fourth splicing side, a fifth splicing side and a sixth splicing side, the first splicing side is provided with a CA section, the second splicing side is provided with a CB section, the first butt joint side is butt jointed with the B section, the third splicing side is aligned with the fourth splicing side and a D section is provided, the second butt joint side is butt jointed with the fifth splicing side of the A section, the fifth splicing side is provided with an AB section, and the sixth splicing side is provided with an AC section; the method comprises the following steps:

[0008] Step S1) erecting the segment start scaffolding, which is to erect the joint scaffolding for closing and butting the CA segment and the CB segment to form the C segment and to erect the channel scaffolding for closing and butting the AB segment and the AC segment to form the A segment;

[0009] Step S2) scaffolding is set up in sections, which includes setting up the bow and stern channels, guardrails and ladders of the bottom plate of section D, which are used to close section A and section C on section D;

[0010] Step S3) After the A, B and C sections are closed and before the pre-welding inspection, the top guardrail and ladder are set up, the scaffolding of the joint between the B and C sections is set up, the walking passage is set up at the extension of the bottom plate of the A section, the bottom plate of the D section is basically run through, and the scaffolding construction platform is set up in the middle of each rib plate below the corner node connecting the C section and the A section in the cabin;

[0011] Step S4) erecting scaffolding for segmental debonding, which is to erect a scaffolding platform at the corner node connecting segment AB and segment AC, and erect scaffolding passages on the inclined surfaces of segment C and segment B and the deck surface of segment A before segmental debonding;

[0012] Step S5) Scaffolding erection for the segmented structure inspection, which is to erect a scaffolding passage at the lower end of segment B after the segment is removed, connect it with the runway of segment D, and replace the up and down ladders of segment D;

[0013] Step S6) erection of scaffolding for segment integrity inspection, which is to erect a scaffolding platform in the C section cabin after the segment structure inspection is passed.

[0014] Furthermore, in the step S1, the step of setting up the butt joint scaffolding for closing and butting the CA segment and the CB segment to form the C segment includes:

[0015] The CA section is placed on the tire frame, and the CB section is folded and hoisted onto the CA section. The CB section is supported and fixed with two supports, and the position of the CB section is adjusted. The ladder is used for assembly work;

[0016] After assembly, scaffolding is installed on the upper joint. Fastener-type scaffolding should be used, and the ground-type platform should be used. Ground-type scaffolding tubes should be added. The ground-type scaffolding tubes are supported on the bottom plate of the CA section and are built from the bow to the stern to form a through scaffolding platform. The scaffolding board and the joint should form a space of 600-800mm in height. Two layers of handrails should be installed on both sides of the scaffolding, and oblique reinforcement tubes should be added in the middle.

[0017] Furthermore, in step S1, the step of setting up a channel scaffolding for joining the AB section and the AC section to form the A section includes:

[0018] Butt and close the AB section with the AC section, fix them with a hand chain hoist, and use a ladder for assembly;

[0019] After assembly, scaffolding is erected from the longitudinal fillet welds from the bow to the stern. The scaffolding should be erected with fasteners, using a ground-type platform, adding ground pipes, fixing the ground scaffolding to the AB section, and two layers of handrails on both sides of the scaffolding.

[0020] Furthermore, in step S2, the steps of setting up the bow of the D-section bottom plate, the stern direction channel, the guardrail and the ladder include:

[0021] A tyre frame is installed on the bottom plate of section D, and scaffolding passages are set up at the bow and stern of the bottom plate of section D. The scaffolding should be set up with fastener-type scaffolding, and the floor-type platform should be used for setting up. Floor-standing pipes are added and fixed to the bottom plate of section D with flat clamps. Two layers of handrails are set up on both sides of the scaffolding, and oblique reinforcement pipes are added in the middle. Ladders are laid on the bow and stern sides of the scaffolding passage, and the ladders maintain an angle of 30° to 45° with the vertical direction.

[0022] Furthermore, in the step S3, it specifically includes:

[0023] Using the D-section passage scaffolding as a reference, erect and fix the A-section, B-section and C-section scaffolding, erect ladders leading to the C-section inclined plate surface in sequence, erect ladders on both sides of the bow and stern, and arrange the ladders at the corner node of the C-section cabin connecting with the A-section, and erect guardrails on both sides of the bow and stern of the C-section inclined plate surface;

[0024] Erect the joint scaffolding between Sections B and C. The scaffolding is fastened with scaffolding, and the floor-standing platform is used. Add floor-standing pipes and fix them on Section B with bent clamps. The height of the scaffolding channel is 400-600mm lower than the height of the joint. The ladders on the bow and stern sides of the joint scaffolding channel are higher than those of Section D. The ladders are fixed to the joint channel and the rigid frame, and the ladders are kept at an angle of 30° to 45° to the vertical direction.

[0025] A walking passage is set up at the extension of the bottom plate of section A. The scaffolding platform channel of section A is connected with the bow and stern scaffolding channel platforms of section D, forming a passage loop inside the channel of section D, the channel of section A and section C, so that the bottom plate of section D is basically accessible;

[0026] A scaffolding construction platform is set up in the middle of each rib below the corner node connecting the C section cabin with the A section. The scaffolding platform is intermittent and independent, and each scaffolding platform needs to be equipped with up and down ladders.

[0027] Furthermore, in step S4, a scaffolding platform is set up at the corner node connecting segment AB and segment AC. The scaffolding is set up using a fastener-type scaffolding, a ground-type platform is set up, ground-type pipes are added, and the scaffolding is fixed to the bottom plate of segment D using a flat clamp.

[0028] Furthermore, in step S4, when constructing scaffolding passages on the inclined surfaces of sections C and B and the deck surface of section A, the inclined surfaces of sections C and B are coplanar, and the scaffolding passages are constructed according to the height of the inclined surfaces before the deck surface of section A is segmented. The inclined scaffolding passages of sections C and B are constructed based on the joint scaffolding of sections C and B, and up and down ladders are installed between the scaffolding platform layers.

[0029] Furthermore, in step S5, a scaffolding passage is set up at the lower end of section B. The scaffolding is set up using a fastener-type scaffolding, and a ground-type platform is used for the scaffolding. Ground-type pipes are added and fixed to section B using bent chucks. The height of the scaffolding passage is not flush with the butt joint. The scaffolding passage at the lower end of section B should be connected to the scaffolding passage of section D using scaffolding boards.

[0030] Furthermore, in step S6, after the acceptance of the segmented structure is completed, electrical outfitting and pipe outfitting are installed in the C section cabin, and a scaffolding platform is set up on the iron outfitting channel in the C section cabin. The scaffolding is set up using a fastener-type scaffolding, the scaffolding height is higher than the iron outfitting channel in the C section cabin, a floor pipe is added to the scaffolding channel, and the scaffolding platform is fixed using a bent chuck.

[0031] The present application also provides a method for constructing a segmented splicing of the side top deck of an LNG ship, which adopts the segmented scaffolding erection method of the side top deck of the LNG ship described above for auxiliary construction. The constructed side top deck of the LNG ship includes a segment A, a segment C and a segment B spliced ​​in sequence, wherein the segment C includes a first splicing side, a second splicing side, a first docking side, a third splicing side and a second docking side arranged in sequence, the segment A includes a fourth splicing side, a fifth splicing side and a sixth splicing side arranged in sequence, a CA segment is arranged on the first splicing side, a CB segment is arranged on the second splicing side, the first docking side is docked with the segment B, the third splicing side is aligned with the fourth splicing side and a D segment is arranged, the second docking side is docked with the fifth splicing side of the segment A, an AB segment is arranged on the fifth splicing side, and an AC segment is arranged on the sixth splicing side.

[0032] The scaffolding erection method and splicing construction method of the side deck segment of the LNG ship of the present invention are based on the construction sequence and acceptance requirements of the side deck segment, and adopt a step-by-step erection method. The scaffolding erection and the segment construction are carried out simultaneously to ensure the continuous construction of the side deck segment, improve the efficiency of the side deck segment construction, avoid cross-operation in the same area vertically on the production site, prevent production chaos, ensure the side deck segment construction period, and improve the efficiency of the LNG ship side deck segment construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is the schematic diagram of the docking of Section C of the side deck section in this application;

[0034] Figure 2 This is the schematic diagram of the docking of Section A of the side deck section in this application;

[0035] Figure 3 This is the schematic diagram of Section D of the side deck of this application;

[0036] Figure 4 This is a schematic diagram of the section assembly of the side deck of this application;

[0037] Figure 5 This is a schematic diagram of the section nodes of the side deck of this application;

[0038] Figure 6 The present invention is a schematic flow chart of a method for erecting segmented scaffolding on the side deck of an LNG ship according to the present invention. DETAILED DESCRIPTION

[0039] The purpose of the present invention is to provide a method for erecting scaffolding in sections of a side deck of an LNG ship, so as to solve the problem that the scaffolding erection in the section construction process of the side deck does not meet the section progress, resulting in low section construction efficiency.

[0040] In order to achieve the above object, the technical solution of the present invention is:

[0041] A method for erecting scaffolding for the side deck of an LNG ship is used to assist in the construction of the side deck of an LNG ship. The construction process of the side deck of an LNG ship can be found in Figures 1 to 5As shown. The LNG ship side top deck includes a sequentially spliced ​​A section 1, a C section 2 and a B section 3, wherein the C section 2 includes a first spliced ​​side, a second spliced ​​side, a first butt joint side, a third spliced ​​side and a second butt joint side, and the A section 1 includes a fourth spliced ​​side, a fifth spliced ​​side and a sixth spliced ​​side, the first spliced ​​side is provided with a CA section 21, the second spliced ​​side is provided with a CB section 22, the first butt joint side is butt jointed with the B section 3, the third spliced ​​side is aligned with the fourth spliced ​​side and is provided with a D section 4, the second butt joint side is butt jointed with the fifth spliced ​​side of the A section 1, the fifth spliced ​​side is provided with an AB section 11, and the sixth spliced ​​side is provided with an AC section 12.

[0042] See also Figures 1 to 5 As shown, section A 1 is the middle group of the deck sub-section, section B 3 is the middle group of the well deck, section C 2 is the middle group of the outer inclined top deck, section D 4 is the inner inclined plate assembly, and longitudinal bones are installed. Section CA 21 is the outer inclined top deck assembly, section CB 22 is the secondary middle group of the well deck, section AB 11 is the base surface, and sections A84FC, A85FC, A86FC, A87FC, and A88FC are arranged in sequence along the length direction of section AB 11; section D 4, section CA 21, section CB 22, section AB 11, and section AC 12 are all platform plates.

[0043] like Figure 6 As shown, the method for erecting segmented scaffolding on the side deck of an LNG ship comprises the following steps:

[0044] Step S1) erecting the segment start scaffolding, which is to erect the joint scaffolding for the CA segment 21 and the CB segment 22 to form the C segment 2 and to erect the channel scaffolding for the AB segment 11 and the AC segment 12 to form the A segment 1;

[0045] Step S2) scaffolding is set up in sections, which includes setting up the bow and stern channels, guardrails and ladders of the bottom plate of section D 4, which are used to close section A 1 and section C 2 on section D 4;

[0046] Step S3) scaffolding erection before segment welding, which is to erect top-level guardrails and ladders after segment A 1, segment B 3 and segment C 2 are closed and before pre-welding inspection, erect scaffolding for the joint between segment B 3 and segment C 2, erect a walking passage at the extension of the bottom plate of segment A 1, basically run through the bottom plate of segment D 4, and erect a scaffolding construction platform in the middle of each rib plate below the corner node (hereinafter referred to as node No. 6) connecting segment C 2 and segment A 1 in the cabin;

[0047] Step S4) erecting scaffolding for segmental debonding, which is to erect a scaffolding platform at the corner node (hereinafter referred to as node No. 7) connecting segment AB 11 and segment AC 12 before segmental debonding, and erect scaffolding passages on the inclined surfaces of segment C 2 and segment B 3 and the deck surface of segment A 1;

[0048] Step S5) Scaffolding erection for the segmented structure inspection, which is to erect a scaffolding passage at the lower end of segment B 3 after the segment is removed, connect it with the runway of segment D 4, and replace the up and down ladders of segment D 4;

[0049] Step S6) erection of scaffolding for segment integrity inspection, which is to erect a scaffolding platform in cabin 2 of segment C after the segment structure inspection is passed.

[0050] Among them, scaffolding refers to the scaffolding, and demolition refers to the dismantling of the scaffolding.

[0051] See also Figure 1 As shown, in step S1, the scaffolding for the butt joint of section C 2 of the side deck section of the construction project and the passage of section A 1 is set up as follows; that is, the steps of setting up the butt joint scaffolding for the closing and butting of section CA 21 and section CB 22 to form section C 2 include:

[0052] The docking of the side deck section C section 2 refers to the closure and docking of the CA section 21 and the CB section 22. The CA section 21 is placed on the frame, and the CB section 22 is folded and hoisted onto the CA section 21. Two supports are used to support and fix the CB section 22, and then the position of the CB section 22 is adjusted using tools such as hand winches to carry out assembly operations. Temporary climbing measures such as ladders can be used for assembly operations. After the assembly is completed, scaffolding needs to be erected to scaffold the upper joint. The scaffolding should be fastener-type scaffolding. If the floor-type platform is used, floor pipes must be added. The scaffolding pipes need to be supported on the bottom plate of the CA section 21, and a through scaffolding platform is erected from the bow to the stern. The scaffolding board and the joint should form a space of about 600-800mm in height for the safe passage of construction personnel. The width of the scaffolding is recommended to be 5-6 scaffolding boards, and the scaffolding boards cannot be overlapped. The flatness of the scaffolding platform must be ensured to meet the walking safety of personnel. The handrails on both sides of the scaffolding need to be built in two layers, with an inclined reinforcement pipe in the middle. The scaffolding walkway platform should be equipped with a solid skirting board to prevent people from sliding down. The scaffolding platform needs to be reinforced with the CA section 21 fixed ribs to ensure the stability and firmness of the scaffolding platform.

[0053] See also Figure 2As shown, in the step S1, the scaffolding of the channel of section A 1 refers to the closing of section AB 11 and section AC 12, which are fixed by hand winches. Temporary climbing measures such as ladders can be used for assembly operations. After the assembly is completed, scaffolding needs to be erected from the longitudinal fillet welds of the bow to the stern. The scaffolding should be erected with fasteners. If a floor-standing platform is used for erection, floor pipes must be added, and the scaffolding needs to be fixed to section AB 11. The width of the scaffolding is recommended to be 2-3 scaffolding boards, and the scaffolding boards cannot be overlapped. The flatness of the scaffolding platform must be guaranteed to meet the walking safety of personnel. The height of the scaffolding platform depends on the height of the longitudinal fillet weld and should meet the working height of the construction personnel. The handrails on both sides of the scaffolding need to be erected in two layers, and the scaffolding walkway platform should be equipped with firm skirting boards to prevent personnel from sliding down.

[0054] See also Figure 3 As shown, in step S2, the bow and stern direction channels, guardrails and ladders of the bottom plate of section D 4 are set up as follows;

[0055] The scaffolding frame is installed on the bottom plate of Section D 4. The scaffolding passage is set up in the bow and stern directions of the bottom plate of Section D 4. The scaffolding should be set up with fasteners. If the floor-type platform is used, the floor pipe must be added and fixed to the bottom plate of Section D 4 with a flat clamp. The width of the scaffolding is recommended to be 2 scaffolding boards, and the scaffolding boards cannot be overlapped. The flatness of the scaffolding platform must be ensured to meet the walking safety of personnel. The handrails on both sides of the scaffolding need to be set up in two layers, and an oblique reinforcement pipe is added in the middle. The scaffolding walkway platform should be added with a firm skirting board to prevent personnel from sliding down. Ladders should be laid on both sides of the scaffolding passage. The ladder should be kept at an angle of 30° to 45° with the vertical direction to ensure the safety of production staff climbing up and down the ladder. The ladder should be set at both ends of the passage, and materials should not be stacked next to the ladder to ensure the safety of production personnel. The ladder needs to be fixed to the scaffolding passage, and the bottom of the ladder should be fixed to the rigid frame to ensure the safety and stability of the ladder.

[0056] See also Figure 4 As shown, in step S3, after the side deck sections A 1, B 3 and C 2 are closed, before the pre-welding inspection, the top guardrail and ladder are set up, the scaffolding of the joint between B 3 and C 2 is set up, the walking passage is set up at the extension of the bottom plate of section A 1, the bottom plate of section D 4 is basically run through, and the scaffolding construction platform is set up in the middle of each rib plate below the No. 6 node in the cabin of section C 2;

[0057] According to the construction method of the side deck, the side deck is divided into sections A 1, B 3 and C 2. After the sections are closed, the construction personnel can fix each section. The scaffolding personnel use the scaffolding of the 4th channel of section D as the basis for the construction. First, the ladder leading to the inclined board of section C 2 is set up. Both the bow and stern sides need to be set up, and the position of the ladder should be arranged at the position of node 6. The cross section of node 6 can be seen when climbing the ladder, which is convenient for construction personnel to construct and for shipowners and ship inspections to conduct inspections. Guardrails should be set up on both sides of the bow and stern of the inclined board of section C 2, and skirting boards should be installed at the bottom of the guardrails to prevent construction personnel from stepping on air and sliding down.

[0058] Furthermore, in the step S3, the butt joint scaffolding of section B 3 and section C 2 is set up. The purpose of setting up the butt joint scaffolding is to facilitate the construction work of the production personnel in the butt joint area of ​​section B 3 and section C 2. The scaffolding should be set up with a fastener-type scaffolding. When using a floor-type platform for setting up, a floor pipe must be added and fixed to section B 3 with a bent chuck. The width of the scaffolding channel should be the width of 2 scaffolding boards. The height of the scaffolding channel cannot be flush with the butt joint, and the scaffolding boards cannot be overlapped. It should be lower than the height of the butt joint by about 400-600mm. The specific height of the scaffolding channel Depending on the working habits of the construction workers, ladders should be set up on the bow and stern sides of the butt joint scaffolding channel. Under normal circumstances, the butt joint scaffolding channel is higher than the bow and stern channels of Section D. To ensure the flatness of the scaffolding platform and meet the walking safety of personnel, the ladders on the bow and stern sides of the butt joint scaffolding channel should be higher than Section D 4 channels. The ladder needs to be fixed to the butt joint channel and the rigid tire frame. The ladder should maintain an angle of 30° to 45° with the vertical direction to ensure the safety of production employees climbing up and down the ladder. The ladder should be set at both ends of the channel, and materials should not be stacked next to the ladder to ensure the safety of production personnel.

[0059] Furthermore, in the step S3, a walking passage is set up at the extension of the bottom plate of section A 1, and the bottom plate of section D 4 is basically connected. The height of the holes in the ribs of section A 1 is generally more than 1 meter, which is not conducive to the passage of construction personnel. In order to facilitate the construction of construction personnel and the shipowner's ship inspection and inspection, a scaffolding platform passage is required to be set up at the extension of the bottom layer of section A 1. The ribs of section A 1 are inclined structures. In order to ensure the convenient passage of the scaffolding passage, it is recommended to set up the width of 10-12 scaffolding boards at the extension of section A 1. The specific width should be determined by the inclination angle of the ribs of section A 1. The scaffolding should be set up with fasteners. If the floor-type platform is used, a floor pipe must be added and fixed on section A 1 with a flat chuck. The height of the scaffolding passage cannot be flush with the joint, and the scaffolding boards cannot be overlapped. The flatness of the scaffolding platform must be ensured to meet the walking safety of personnel.

[0060] Furthermore, in step S3, the scaffolding platform channel of section A 1 should be connected with the bow and stern scaffolding channel platforms of section D 4 to form a traffic loop inside the channel of section D 4, the channel of section A 1 and section C 2, and the segmented bottom layer is basically connected.

[0061] Furthermore, in the step S3, a scaffolding construction platform is set up in the middle of each rib below node No. 6 in cabin No. 2 of section C. A scaffolding platform needs to be set up to lower node No. 6 in cabin No. 2 of section C. The scaffolding platform is intermittent and independent. It is recommended that the width of the scaffolding platform be the width of 2 scaffolding boards. Each scaffolding platform needs to be arranged with up and down ladders to facilitate personnel to work at heights, and the up and down ladders of the scaffolding platform need to be fixed to ensure the safety of production personnel going up and down.

[0062] See also Figure 5 As shown, in the step S4, before the segment is removed, a scaffolding platform is set up at the node below No. 7. The main deck iron outfitting, generally guardrails, mooring piles and mooring holes, etc., needs to be hoisted on the main deck of node No. 7. The scaffolding should be set up with a fastener-type scaffolding. If a floor-type platform is used, a floor-standing tube must be added and fixed to the bottom plate of section D 4 with a flat chuck. The width of the scaffolding is recommended to be 2 scaffolding boards, and the scaffolding boards cannot be overlapped. The flatness of the scaffolding platform must be ensured to meet the walking safety of personnel. The height of the scaffolding platform should take into account the installation positions of outfitting parts such as guardrails, mooring piles and mooring holes, so as to facilitate the hoisting, assembly and welding operations of outfitting parts. The main deck scaffolding platform should also consider the hoisting position of the main deck to ensure that the scaffolding platform does not affect the hoisting. The scaffolding platform should have ladders for going up and down, and the ladders must be fixed to ensure the safety of personnel going up and down.

[0063] Furthermore, in step S4, scaffolding passages are set up between the inclined surfaces of section C 2 and section B 3 and the deck surface of section A 1. The inclined surfaces of section C 2 and section B 3 and the deck surface of section A 1 should be set up according to the height of the inclined surfaces before the segmental demolding. The inclined scaffolding passages of section C 2 and section B 3 should be based on the joint scaffolding of section C 2 and section B 3, taking into account the needs of segmental construction and painting construction, and the specific setting requirements are such as the setting requirements of the joint scaffolding of section C 2 and section B 3, and the up and down ladders should be installed between the scaffolding platforms to ensure the up and down passage between the scaffolding platforms on the inclined surfaces.

[0064] Further, in step S5, after the segment is debonded, a scaffolding passage is set up at the lower end of segment B 3, connected to the runway of segment D 4, and the up and down ladders of segment D 4 are replaced. The scaffolding should be set up with a fastener-type scaffolding, and a floor-type platform should be used. A floor pipe must be added and fixed to segment B 3 with a bent chuck. The height of the scaffolding passage cannot be flush with the joint, and the scaffolding boards cannot be overlapped. The flatness of the scaffolding platform must be ensured to meet the walking safety of personnel. The up and down ladders of segment D 4 need to be replaced to meet the requirements of the upper and lower segments under the state of the segmented debonded portal frame. The scaffolding passage at the lower end of segment B 3 should be connected to the scaffolding passage of segment D 4 using a scaffolding board. Inspect and reinforce all scaffolding on the segment to ensure unobstructed walking of the scaffolding on the segment.

[0065] Furthermore, in step S6, after the segmented structure is inspected, a scaffolding platform is set up in cabin 2 of section C. After the segmented structure is inspected, electrical outfitting and pipe outfitting need to be installed in cabin 2 of section C. A scaffolding platform is set up on the iron outfitting passage in cabin 2 of section C. The scaffolding should be set up with a fastener-type scaffolding. The scaffolding width should be 2-3 scaffolding boards. The specific requirements are based on the scope of construction operations. The scaffolding height should be higher than the iron outfitting passage in cabin 2 of section C, and it needs to meet the construction height requirements of production personnel. The scaffolding passage needs to add floor pipes, and the scaffolding platform is fixed with a bent chuck. The scaffolding boards cannot be overlapped. The flatness of the scaffolding platform must be ensured to meet the walking safety of personnel.

[0066] The method for erecting scaffolding for the side deck sections of an LNG ship of the present invention adopts a step-by-step erection method according to the construction sequence and acceptance requirements of the side deck sections, and the scaffolding erection and the section construction are carried out simultaneously, so as to ensure the continuous construction of the side deck sections, improve the efficiency of the side deck section construction, avoid cross-operation in the same area longitudinally at the production site, prevent production chaos, ensure the construction period of the side deck sections, and improve the construction efficiency of the side deck sections of the LNG ship.

[0067] The present application also provides a method for constructing a LNG ship's side top deck in sections, which adopts the above-mentioned method for erecting scaffolding for the LNG ship's side top deck in sections for auxiliary construction. The constructed LNG ship's side top deck includes a sequentially spliced ​​section A 1, a sequentially spliced ​​section C 2 and a sequentially spliced ​​section B 3, wherein the sequentially spliced ​​section C 2 includes a sequentially arranged first splicing side, a second splicing side, a first butt joint side, a third splicing side and a second butt joint side, the sequentially arranged fourth splicing side includes a fourth splicing side, a fifth splicing side and a sixth splicing side, the first splicing side includes a CA section 21, the second splicing side includes a CB section 22, the first butt joint side is butt jointed with the B section 3, the third splicing side is aligned with the fourth splicing side and a D section 4 is provided, the second butt joint side is butt jointed with the fifth splicing side of the A section 1, the fifth splicing side includes an AB section 11, and the sixth splicing side includes an AC section 12.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for erecting scaffolding for the segmented top deck of an LNG ship, which is used to assist the segmented splicing and construction of the top deck of an LNG ship, wherein the top deck of the LNG ship comprises a sequentially spliced ​​section A, a section C and a section B, wherein the section C comprises a first splicing side, a second splicing side, a first butt joint side, a third splicing side and a second butt joint side, the section A comprises a fourth splicing side, a fifth splicing side and a sixth splicing side, the first splicing side is provided with a CA section, the second splicing side is provided with a CB section, the first butt joint side is butt jointed with the section B, the third splicing side is aligned with the fourth splicing side and a D section is provided, the second butt joint side is butt jointed with the fifth splicing side of the section A, the fifth splicing side is provided with an AB section, and the sixth splicing side is provided with an AC section; characterized in that The method comprises the following steps: Step S1) erecting the segment start scaffolding, which is to erect the joint scaffolding for closing and butting the CA segment and the CB segment to form the C segment and to erect the channel scaffolding for closing and butting the AB segment and the AC segment to form the A segment; Step S2) scaffolding is set up in sections, which includes setting up the bow and stern channels, guardrails and ladders of the bottom plate of section D, which are used to close section A and section C on section D; Step S3) scaffolding erection before section welding, which is to erect top-level guardrails and ladders after the A, B and C sections are closed and before the pre-welding inspection, erect scaffolding for the joints between the B and C sections, erect a walking passage at the extension of the bottom plate of the A section, basically run through the bottom plate of the D section, and erect a scaffolding construction platform in the middle of each rib below the corner node connecting the C section with the A section; Step S4) erecting scaffolding for segmental debonding, which is to erect a scaffolding platform at the corner node connecting segment AB and segment AC, and erect scaffolding passages on the inclined surfaces of segment C and segment B and the deck surface of segment A before segmental debonding; Step S5) Scaffolding erection for the segmented structure inspection, which is to erect a scaffolding passage at the lower end of segment B after the segment is removed, connect it with the runway of segment D, and replace the up and down ladders of segment D; Step S6) scaffolding erection for segment integrity inspection, which is to erect a scaffolding platform in the C segment cabin after the segment structure inspection is passed; In the step S1, the step of setting up the scaffolding for the joint of the CA segment and the CB segment to form the C segment includes: placing the CA segment on a frame, hoisting the CB segment on the CA segment, using two supports to support and fix the CB segment, adjusting the position of the CB segment, and using a ladder to perform assembly operations; after the assembly is completed, scaffolding is set up for the upper joint, wherein the scaffolding should be set up with a fastener-type scaffolding, using a ground-type platform setting method, adding a ground-type scaffolding tube, and the ground-type scaffolding tube is supported on the bottom plate of the CA segment, and is set up from the bow to the stern to form a through scaffolding platform, and the scaffolding board and the joint should form a space of 600-800mm in height, and the handrails on both sides of the scaffolding should be set up in two layers, and an oblique reinforcement tube is added in the middle; In the step S1, the step of erecting the channel scaffolding for joining the AB section and the AC section to form the A section includes: joining the AB section and the AC section together, fixing them by a hand chain hoist, and using a ladder for assembly; after the assembly is completed, the scaffolding is erected from the longitudinal fillet weld of the bow to the stern, wherein the scaffolding should be erected by a fastener-type scaffolding, using a floor-type platform erection method, adding a floor-type pipe, and fixing the floor-type scaffolding with the AB section, and the handrails on both sides of the scaffolding need to be erected in two layers; In step S2, the steps of setting up the bow of the D section bottom plate, the stern direction channel, the guardrail and the ladder include: A scaffolding channel is set up on the D section bottom plate at the bow and stern of the D section bottom plate. The scaffolding should be set up with fasteners, using a floor-type platform, adding floor pipes, and fixed on the D section bottom plate with flat clamps. The handrails on both sides of the scaffolding are set up in two layers, and an oblique reinforcement pipe is added in the middle. Ladders are laid on both sides of the scaffolding channel at a 30° to 45° angle to the vertical direction; In the step S3, it specifically includes: erecting and fixing the scaffolding of sections A, B and C based on the scaffolding of section D channel, erecting ladders leading to the inclined board surface of section C in sequence, erecting ladders on both sides of the bow and stern, and the position of the ladder is arranged at the corner node position connected to section A in the cabin of section C, and erecting guardrails on both sides of the bow and stern of the inclined board surface of section C; erecting the butt joint scaffolding of sections B and C, the scaffolding is erected by fastener-type scaffolding, using a floor-type platform erection method, adding floor pipes, and fixing it on section B with a bent clamp, the height of the scaffolding channel is lower than the height of the butt joint 400-600mm, the ladders on both sides of the bow and stern of the butt joint scaffolding channel are higher than the D section channel, the ladders are fixed to the butt joint channel and the rigid tire frame, and the ladders are kept at an angle of 30° to 45° with the vertical direction; A walking passage is set up at the extension of the Section A floor plate, and the Section A scaffolding platform channel is connected with the bow and stern scaffolding channel platforms of Section D, forming a passage loop inside the Section D channel, the Section A channel and Section C, so that the Section D floor plate is basically accessible; a scaffolding construction platform is set up in the middle of each rib below the corner node connecting the Section C cabin with Section A. The scaffolding platforms are intermittent and independent, and each scaffolding platform needs to be equipped with up and down ladders.

2. The method for erecting scaffolding for the side deck of an LNG ship in sections according to claim 1 is characterized in that: In step S4, a scaffolding platform is set up at the corner node connecting segment AB and segment AC. The scaffolding is set up using a fastener-type scaffolding, a ground-type platform is set up, and ground-type pipes are added, which are fixed to the bottom plate of segment D using flat clamps.

3. The method for erecting segmented scaffolding on the side deck of an LNG ship according to claim 1 is characterized in that: In step S4, when constructing scaffolding passages on the inclined surfaces of sections C and B and the deck surface of section A, the inclined surfaces of sections C and B are coplanar, and the scaffolding passages are constructed according to the height of the inclined surfaces before the deck surface of section A is segmented. The inclined scaffolding passages of sections C and B are constructed based on the joint scaffolding of sections C and B, and up and down ladders are installed between the scaffolding platform layers.

4. The method for erecting segmented scaffolding on the side deck of an LNG ship according to claim 1 is characterized in that: In step S5, a scaffolding passage is set up at the lower end of section B. The scaffolding is set up using a fastener-type scaffolding, a ground-type platform is used, ground-type pipes are added, and the scaffolding passage is fixed to section B using a bent chuck. The height of the scaffolding passage is not flush with the joint. The scaffolding passage at the lower end of section B should be connected to the scaffolding passage of section D using a scaffolding board.

5. The method for erecting segmented scaffolding on the side deck of an LNG ship according to claim 1 is characterized in that: In step S6, after the inspection of the segmented structure is completed, electrical outfitting and pipe outfitting are installed in the C section cabin, and a scaffolding platform is set up on the iron outfitting channel in the C section cabin. The scaffolding is set up using a fastener-type scaffolding, the scaffolding height is higher than the iron outfitting channel in the C section cabin, a floor pipe is added to the scaffolding channel, and the scaffolding platform is fixed with a bent clamp.

6. A method for constructing a LNG ship's side deck by segmented splicing, characterized in that: The LNG ship's side top deck segmented scaffolding erection method described in any one of claims 1 to 5 is adopted for auxiliary construction, and the constructed LNG ship's side top deck includes a segment A, a segment C and a segment B which are spliced ​​in sequence, wherein the segment C includes a first splicing side, a second splicing side, a first butt joint side, a third splicing side and a second butt joint side which are arranged in sequence, and the segment A includes a fourth splicing side, a fifth splicing side and a sixth splicing side which are arranged in sequence, a CA segment is arranged on the first splicing side, a CB segment is arranged on the second splicing side, the first butt joint side is butt jointed with the segment B, the third splicing side is aligned with the fourth splicing side and a D segment is arranged, the second butt joint side is butt jointed with the fifth splicing side of the segment A, an AB segment is arranged on the fifth splicing side, and an AC segment is arranged on the sixth splicing side.

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