CN115783180B - Construction method of floating dock overpass - Google Patents
Construction method of floating dock overpass Download PDFInfo
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- CN115783180B CN115783180B CN202211543697.8A CN202211543697A CN115783180B CN 115783180 B CN115783180 B CN 115783180B CN 202211543697 A CN202211543697 A CN 202211543697A CN 115783180 B CN115783180 B CN 115783180B
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- 238000007667 floating Methods 0.000 title claims abstract description 77
- 238000010276 construction Methods 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000009434 installation Methods 0.000 claims abstract description 22
- 238000003466 welding Methods 0.000 claims abstract description 22
- 238000009966 trimming Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 238000012545 processing Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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Abstract
The invention discloses a manufacturing and installing method of a floating dock overpass, and relates to the technical field of ship construction. The method comprises a manufacturing method of the floating dock overpass and an installation method of the floating dock overpass; the manufacturing method of the floating dock overpass comprises the following steps: s1: manufacturing an overpass main body; s2: simulating the folding state of the overpass, and trimming the folding port structural allowance of the upper supporting structure and the lower supporting structure; s3: an upper supporting structure, a lower supporting structure and a slewing mechanism of the overpass main body are arranged on a total assembly field; the installation method of the floating dock overpass comprises the following steps: t1: surveying a overpass folding ground-like line in a dock, and T2: and (3) accurately positioning the overpass according to the folding pattern line of the overpass, and assembling and welding the overpass on the floating dock. The construction floating dock overpass manufactured by the method has high manufacturing and folding precision, and the high-altitude construction operation is relatively less, so that the control difficulty of the safety and precision of construction is greatly reduced.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to a construction method of a floating dock overpass.
Background
The floating dock overpass is a truss type steel structure communicated with the left and right dock walls, the steel structure and the floating dock main hull are fixed by means of an upper supporting structure and a lower supporting structure, and the overpass can rotate for a certain angle under the driving of a slewing mechanism. The overpass is generally composed of a left part and a right part which are respectively fixed on a left dock wall and a right dock wall, and the two parts can be opened and closed under the drive of a slewing mechanism. When the overpass is closed, the left dock wall top deck and the right dock wall top deck of the floating dock can be communicated, so that free passing of personnel on the left dock wall top deck and the right dock wall top deck is realized.
At present, the floating dock overpass is usually prefabricated in a segmented structure of a steel structure on the field, and is respectively hoisted and folded after the prefabrication, and is assembled and welded with mechanical equipment such as a supporting structure and a rotating mechanism of the overpass when the overpass is folded, and final debugging is finished. The above manufacturing and mounting methods have the following problems: 1. the base surface of the boarding folding operation is higher, the construction difficulty is improved, and the folding precision of the overpass is difficult to control; 2. the safety control difficulty of construction is also improved by more high-altitude construction operations.
Disclosure of Invention
The invention aims to provide a construction method of a floating dock overpass, which can effectively control the construction and folding precision of the overpass, has relatively less overhead construction operation and greatly reduces the control difficulty of the safety and precision of construction.
In order to achieve the above object, the technical scheme of the present invention is as follows:
The construction method of the floating dock overpass comprises a manufacturing method of the floating dock overpass and an installation method of the floating dock overpass; the manufacturing method of the floating dock overpass comprises the following steps: s1: manufacturing an overpass main body; s2: simulating the folding state of the overpass, and trimming the folding port structural allowance of the upper supporting structure and the lower supporting structure; s3: an upper supporting structure, a lower supporting structure and a slewing mechanism of the overpass main body are arranged on a total assembly field; the installation method of the floating dock overpass comprises the following steps: t1: surveying a overpass folding ground-like line in a dock, and T2: and (3) accurately positioning the overpass according to the folding pattern line of the overpass, and assembling and welding the overpass on the floating dock.
The manufacturing method of the overpass main body in the S1 comprises the following steps: q1: the overpass assembly is divided into a platform main body, a vertical support, an inclined support and a combined support assembly; the platform body includes a head Ping Taizu stand and a tail Ping Taizu stand; q2: assembling and manufacturing, namely respectively manufacturing a platform main body, a vertical support, an inclined support and a combined support assembly divided by the Q1; q3: surveying an assembly ground sample line of the overpass main body on a total group field; q4: and (3) completing the total assembly operation of the overpass main body according to the Q3 survey overpass main body assembly ground sample line.
Wherein, the platform fracture between the head part Ping Taizu and the tail part Ping Taizu is arranged at the position of the plate thickness change of the platform plate and the butt joint position of the platform main plate.
The vertical support and the oblique support are divided into the same assembly by taking the length of a circular tube with the maximum processing capacity as a division basis, avoiding a complex structural area, and dividing the assembly and welding areas among the vertical support, the oblique support and the platform main body.
The vertical support and the inclined support in the Q2 are formed by welding cylinders, angle steel tools are respectively arranged at the upper end part and the lower end part of each section of cylinder, and the circle center positions of the cylinders are marked on the angle steel tools.
Wherein, overpass body equipment ground appearance line in Q3 includes: the device comprises a vertical support tube central line ground wire, an inclined support tube central line ground wire, an overpass top plate theoretical ground wire, a slewing mechanism central shaft ground wire and a calibration line.
Wherein, the total group operation of the overpass in Q4 adopts a lateral total group on the total group field.
And in T2, installing an overpass folding guide plate on the dock wall of the floating dock to be welded.
And the overpass folding ground-like line in the T1 is surveyed by the actual positions of the center line of the floating dock hull and the dock wall head closing plate.
Wherein, in T2, the floating dock overpass and the floating dock are welded through the horse board, and after the installation is finished, the horse board remains on the floating dock overpass and the floating dock.
After the technical scheme is adopted, the invention has the beneficial effects that:
the invention relates to a construction method of a floating dock overpass, which comprises a manufacturing method of the floating dock overpass and an installation method of the floating dock overpass; the manufacturing method of the floating dock overpass comprises the following steps: s1: manufacturing an overpass main body; s2: simulating the folding state of the overpass, and trimming the folding port structural allowance of the upper supporting structure and the lower supporting structure; s3: an upper supporting structure, a lower supporting structure and a slewing mechanism of the overpass main body are arranged on a total assembly field; the installation method of the floating dock overpass comprises the following steps: t1: surveying a overpass folding ground-like line in a dock, and T2: and (3) accurately positioning the overpass according to the folding pattern line of the overpass, and assembling and welding the overpass on the floating dock. According to the invention, the folding state of the overpass is simulated, so that underground cutting is realized, the overhead workload is reduced, accidents caused by long-term overhead operation are prevented, and the working efficiency is improved; through reasonable assembly order and the welding mode that set up the overpass main part, reduce overpass main part welding deformation, guarantee overpass main part preparation precision.
The manufacturing method of the antenna bridge main body in the S1 comprises the following steps: q1: the overpass assembly is divided into a platform main body, a vertical support, an inclined support and a combined support assembly; the platform body includes a head Ping Taizu stand and a tail Ping Taizu stand; q2: assembling and manufacturing, namely respectively manufacturing a platform main body, a vertical support, an inclined support and a combined support assembly divided by the Q1; q3: surveying an assembly ground sample line of the overpass main body on a total group field; q4: and (3) completing the total assembly operation of the overpass main body according to the Q3 survey overpass main body assembly ground sample line. The main structure of the overpass is divided into a plurality of groups and the groups are independently built and transported, so that the problems of long overall building period, large sectional size, difficult transportation construction and difficult control of high installation precision of the overpass structure are solved; the ground sample line is assembled by the overpass main body through surveying, so that a basis is provided for later folding, and folding precision is ensured.
The platform fracture between the head Ping Taizu stand and the tail Ping Taizu stand is arranged at the position of the plate thickness change of the platform plate and the butt joint position of the platform main plate, so that the working procedure forward to the greatest extent is realized, and the construction difficulty and the construction amount of the overpass assembly are reduced.
The vertical support and the oblique support are broken by taking the length of a circular tube with the maximum processing capacity as a dividing basis, a complex structural area is avoided, the assembly and welding areas among the vertical support, the oblique support and the platform main body are divided into the same assembly, and the complex assembly and welding operation in the overpass main body is finished in advance in the assembly stage by optimizing the assembly and division of the overpass.
Through setting up angle steel frock, the centre of a circle position of mark drum on the angle steel frock to provide the basis for follow-up location.
The main assembly operation of the overpass adopts the side state main assembly on the main assembly field, and by adopting the side state main assembly, the construction of the main assembly of the overpass is convenient, and simultaneously, a good construction base surface is provided for the pre-installation of the upper and lower support structures in advance, so that the pre-installation precision is ensured.
The floating dock overpass and the floating dock are welded through the horse plates, after the installation is completed, the horse plates are reserved on the floating dock overpass and the floating dock, the folding precision of the overpass mechanism is ensured by sealing the horse plates, and meanwhile, the horse plates are reserved, so that the workload of removing the horse plates is reduced.
In summary, the construction method of the floating dock overpass solves the technical problems of large production amount and low precision of the floating dock overpass in the prior art, and the floating dock overpass produced by the construction method of the floating dock overpass has high production and installation precision, has relatively less overhead construction operation, and greatly reduces the safety control difficulty and precision control difficulty of construction.
Drawings
FIG. 1 is a schematic diagram of an overpass body overpass assembly division;
FIG. 2 is a schematic view of a cylinder structure of a vertical support and a diagonal support;
FIG. 3 is a schematic view of the B-direction structure of FIG. 2;
FIG. 4 is an enlarged view of a portion of FIG. 3A;
FIG. 5 is a schematic view of the structure of the composite support assembly;
FIG. 6 is a schematic drawing of a survey of an overpass assembly plot;
FIG. 7 is a general group operation schematic of the overpass body;
FIG. 8 is a schematic view of the mounting structure of the upper support structure, the lower support structure and the swing mechanism;
FIG. 9 is a schematic view of the mounting structure of the lower support structure;
FIG. 10 is a schematic view of the mounting structure of the upper support structure and swing mechanism;
FIG. 11 is a schematic view of the upper support structure and the lower support structure with allowance trim;
FIG. 12 is a schematic view of a guide plate mounting structure;
FIG. 13 is a schematic drawing of a overpass closure ground wire survey;
FIG. 14 is a schematic view of the installation structure of a floating dock overpass;
FIG. 15 is a schematic view of total station detection floating dock overpass installation accuracy;
In the figure: 1. the platform comprises a platform main body, 11, a head part Ping Taizu, 12, a tail part Ping Taizu, 2, a vertical support, 21, a steel plate, 22, angle steel, 221, a first right angle piece, 222, a second right angle piece, 223, a circle center, 23, an upper support structure, 24, a lower support structure, 3, an inclined support, 4, a combined support assembly, 41, a first support tube, 42, a second support tube, 51, a support tube circle center ground wire, 52, a standard clamping plate, 61, a vertical support tube center line ground wire, 62, an inclined support tube center line ground wire, 63, an overpass roof theoretical ground wire, 64, a slewing mechanism center axis ground wire, 65, a calibration wire, 7, a support tool, 8, a slewing mechanism, 9, a guide plate, 92, an overpass folding ground wire, 921, a head part Ping Taizu vertical rotation axis, 922, a tail part Ping Taizu vertical rotation axis, 923, an overpass length positioning reference line, 924, a dock wall theoretical wire, 925 and a floating dock center line.
Detailed Description
The invention is further illustrated in the following, in conjunction with the accompanying drawings and examples.
The orientations referred to in the present specification are all relative positional relationships, and do not represent absolute positional relationships, and are shown in the drawings.
A construction method of a floating dock overpass comprises a manufacturing method of the floating dock overpass and an installation method of the floating dock overpass.
1. The manufacturing method of the floating dock overpass comprises the following steps:
s1: and manufacturing the overpass main body.
The manufacturing method of the overpass main body comprises the following steps:
Q1: and (5) assembling and dividing the overpass.
As shown in fig. 1, the overpass main body structure is divided into a platform main body 1, a vertical support 2, an inclined support 3 and a combined support assembly 4 according to the structural characteristics of the overpass main body. The platform body 1 includes a head Ping Taizu stand 11 and a tail Ping Taizu stand 12. The diagonal support 3 is processed in two sections; the combined support assembly 4 comprises a first support tube 41 and a second support tube 42 arranged at an angle.
The overpass assembly is divided, so that assembly manufacturing, transferring and coating operations are facilitated; the difficulty of sectional assembly of the overpass is reduced, the workload of sectional assembly is reduced, and the principle of forward working procedure is adopted. The platform main body 1 of the overpass is divided into a head Ping Taizu stand 11 part and a tail Ping Taizu stand 12 part, so that the size of the assembly in the length direction is reduced, and the assembly is convenient for the whole transportation and coating operation. The platform break between the leading Ping Taizu stand 11 and the trailing Ping Taizu stand 12 is provided at the location where the platform deck thickness varies and the platform deck butt-joint. The platform fracture is selected at the position of the plate thickness change of the platform plate, so that the number of jointed plates during assembly and manufacture is reduced; the platform fracture is simultaneously arranged in the area where only the platform main board is in butt joint, so that the area where the complex structure needs to be welded is avoided.
The vertical support 2 and the oblique support 3 are broken by taking the cylinder length with the maximum processing capacity as a dividing basis, so that the complex structural area is avoided. Meanwhile, the assembly and welding areas between the vertical support 2, the inclined support 3 and the platform main body 1 are divided into the same assembly.
The assembly division realizes the forward movement of the working procedure to the greatest extent, and reduces the construction difficulty and the construction amount of the subsequent overpass assembly.
Q2: and (5) assembling and manufacturing.
And manufacturing a platform main body 1, a vertical support 2, an inclined support 3 and a combined support assembly 4 which are divided by the Q1.
The platform main body 1 is manufactured by a head Ping Taizu stand 11 and a tail Ping Taizu stand 12, the head Ping Taizu stand 11 and the tail Ping Taizu stand 12 are manufactured separately, and the manufacturing methods are identical, and are not described separately below.
The platform main body 1 is manufactured by adopting a positive manufacturing method, and plates around the platform main body 1 are respectively subjected to blanking, welding of flat iron rib plates and the like. When the platform main body 1 is manufactured, the platform bottom plate is jointed with the upper tire and is firmly sealed with the tire frame; then installing rib plates and side plates in sequence, and arranging anti-fall supports when the rib plates and the side plates are installed, so that construction safety is guaranteed, and small flat irons are arranged above the rib plates in advance, so that later welding with a top plate is facilitated; after the assembly is finished, the inside of the platform main body 1 is welded and then the top plate is buckled, a plug welding hole is formed in the position, which is aligned with the inner rib plate, of the top plate, the welding of the plug welding hole is finished, and the corner welding of the top plate and the side plate forms the complete platform main body 1. The platform main body 1 is separated from the jig frame into a free state after being manufactured, and then the flame is shaped so that the precision of the platform main body meets the requirements.
As shown in fig. 2, 3 and 4, the vertical support 2 and the diagonal support 3 are welded together by a cylinder, the cylinder is formed into a circle by cold bending a steel plate 21, and the welded cylinder is slit longitudinally into a cylinder. When the steel plate 21 is blanked, the longitudinal seam of the cylinder is reserved with a blank pressing amount of about 50mm, and the two ends of the cylinder are reserved with assembly adjustment allowance of 10 mm. And angle steel tools are respectively arranged at the upper end part and the lower end part of each section of cylinder, the positions of circle centers 223 of the cylinders are marked by sample punch points on the angle steel tools, and positioning references are provided for subsequent overpass assembly. The angle steel tool comprises angle steel 22, two ends of the angle steel 22 are fixed on the side wall of the cylinder through tack welding, the angle steel 22 comprises a first right angle piece 221 and a second right angle piece 222 which are arranged vertically to each other, the intersection line of the first right angle piece 221 and the second right angle piece 222 is perpendicular to the axis of the cylinder, and the top plane of the first right angle piece 221 passes through the central axis of the cylinder. The angle steel 22 at the upper end and the lower end of each section of cylinder are oppositely arranged. Circle center 223 is marked on first right angle piece 221 with a sample punch as required. For convenience in processing and transportation, the diagonal support 3 is processed in two stages.
As shown in fig. 5, the combined support assembly 4 includes a first support tube 41 and a second support tube 42 disposed at an angle. Before the combined support assembly 4 is assembled, the center ground wire 51 of the support tube is drawn out on an assembly manufacturing site in advance and is used for assisting in determining the assembly angle of the first support tube 41 and the second support tube 42 of the combined support assembly 4. The first support tube 41 and the second support tube 42 are manufactured in accordance with the vertical support 2 and the diagonal support 3. In the manufacturing of the combined support assembly 4, the first support tube 41 and the second support tube 42 are assembled and then welded. During assembly, the first support tube 41 and the second support tube 42 are aligned with the surveyed support tube circle center ground wire 51 by taking the circle center 223 of the angle steel tool at the end part of the cylinder as a reference, so that the installation angles of the vertical support tube and the inclined support tube are ensured, and a standard clamping plate 52 is arranged at the inner part of the intersection of the first support tube 41 and the second support tube 42 and used for assisting in positioning the installation angles of the first support tube 41 and the second support tube 42.
Q3: and (5) surveying the assembled ground sample line of the overpass main body on the total group of fields.
As shown in fig. 6, the overpass body assembly plot for the overpass aggregate is surveyed with a total station on the aggregate site. Overpass body equipment ground appearance line includes: a vertical support tube central line ground wire 61, an inclined support tube central line ground wire 62, an overpass roof theoretical ground wire 63, a slewing mechanism central shaft ground wire 64 and a calibration wire 65.
Q4: and (3) completing the total assembly operation of the overpass main body according to the Q3 survey overpass main body assembly ground sample line.
As shown in FIG. 7, the overpass aggregate operations employ a lateral aggregate on the aggregate site. Before the assembly, various support tools 7 suitable for the platform main body 1, the vertical support 2, the inclined support 3 and the combined support assembly 4 are put in advance according to the assembly division condition of the overpass. In the assembly process, the platform main body 1 with the largest tire positioning is firstly assembled, and the positioning accuracy of the platform main body 1 is determined by utilizing the theoretical ground wire 63 of the upper bridge top plate, the vertical support tube central line ground wire 61 and the inclined support tube central line ground wire 62. After the platform main body 1 is precisely positioned, a rigid sealing tire is arranged, so that the safety and the precision of the vertical support 2 and the inclined support 3 are ensured to meet related requirements. And the anti-rolling tool is arranged when the oblique support 3 and the vertical support 2 participate in the total assembly, so that the total assembly safety of the support tube is ensured.
After the upper tires of all the components of the total assembly of the overpass are assembled, the whole assembly is welded and formed, a platform main body 1 is welded between a head part Ping Taizu stand 11 and a tail part Ping Taizu stand 12, one end of a vertical support 2 is welded with the tail part Ping Taizu stand 12, the other end of the vertical support 2 is welded with a first support tube 41, two sections of an inclined support 3 are mutually welded, the top of the inclined support 3 is welded with the head part Ping Taizu stand 11, and the bottom of the inclined support 3 is welded with a second support tube 42. And after welding, measuring the accuracy of the overpass main body, measuring through a calibration line 65, performing flame correction on the exceeding part, and performing subsequent operation after each accuracy index meets the requirement.
S2: the folding state of the overpass is simulated, and the structural allowance of the upper supporting structure 23 and the lower supporting structure 24 is trimmed.
As shown in fig. 11, the total station is used to measure the precision state of the dock of the left and right overpasses in advance, and the actual folding data of the dock wall are combined to simulate and analyze the precision state of the overpass, and the folding allowance of the upper support structure 23, the lower support structure 24 and the overpass main body is trimmed in advance.
S3: an upper support structure 23, a lower support structure 24 and a swing mechanism 8 are installed on the total assembly site.
As shown collectively in fig. 8, 9 and 10, the upper support structure 23, lower support structure 24 and swivel mechanism 8 are preloaded with the overpass body on site. When preassembled, the upper support structure 23 and the lower support structure 24 are consistent with the angular position relationship of the overpass, namely, the overpass is simulated to be folded with the floating dock main hull, and the overpass is positioned in the direction along the center line of the hull horizontally to the bow.
The upper support structure 23, the lower support structure 24 and the swing mechanism 8 are manufactured as standard components, and the manufacturing process will not be described in detail. When the upper support structure 23, the lower support structure 24 and the slewing mechanism 8 are preassembled with the main body of the overpass on the field, the axes of the upper support structure 23 and the lower support structure 24 should be ensured to be on the same straight line, namely, each point of the axes should fall on the central axis ground wire 64 of the slewing mechanism surveyed in the step S1, the preassembled accuracy is determined by using the auxiliary measurement of the total station, and the error should not exceed 1mm. After preassembling, the rotation axes of the upper support structure 23 and the lower support structure 24 should be marked by light targets on the rotation axes of the upper support structure 23 and the lower support structure 24 at positions which are striking and convenient for measurement in the dock, so that positioning measurement is convenient when the overpass is folded. Meanwhile, a disposable light target is attached to the bottom plate of the main body of the overpass, and one position is arranged every 10m or so from the rotation axis of the overpass as a reference, so that the measurement and positioning of the overpass are facilitated.
The upper supporting structure 23, the lower supporting structure 24 and the slewing mechanism 8 are temporarily sealed and welded with the main body of the overpass by using channel steel or angle steel after the upper supporting structure 23, the lower supporting structure 24 and the slewing mechanism 8 are preassembled with the main body of the overpass on the site and the precision meets the requirements.
2. The installation method of the floating dock overpass comprises the following steps:
T1: and (5) surveying and scribing a overpass folding ground sample line in the dock.
T2: and (3) accurately positioning the overpass according to the folding pattern line of the overpass, and assembling and welding the overpass on the floating dock.
As shown in fig. 11, 12, 13, 14 and 15, the dock wall body of the floating dock welded with the overpass should be welded before the overpass is integrally docked. And measuring the structure folding deviation conditions of the upper and lower support structures 23 and 24 of the floating dock, and installing a bridge folding guide plate 9 on the floating dock wall to be welded of the upper and lower support structures 23 and 24 of the floating dock in advance, wherein the guide plate 9 is used for assisting in rapid positioning of bridge folding and also used as a sealing plate tool after accurate positioning of the bridge.
And (5) surveying the overpass closure ground wire 92 in the overpass closure dock in advance, and placing a high-type supporting tool. The overpass closing ground line 92 mainly comprises a head Ping Taizu vertical rotation axis 921, a tail Ping Taizu vertical rotation axis 922, an overpass length positioning reference line 923, a dock wall theoretical line 924 and a floating dock central line 925. When the ground wire is surveyed, the actual positions of the center line 925 of the floating dock and the front seal plate of the dock wall are surveyed so as to ensure the folding precision of the overpass.
The main structure of the overpass carries the upper supporting structure 23, the lower supporting structure 24 and the slewing mechanism 8 to be integrally hoisted and folded in the dock, the axle centers of the upper supporting structure 23 and the lower supporting structure 24 of the overpass are measured to mark the light targets, and the accurate positioning size of the overpass is determined by aligning the axle center ground wires of the dock. And meanwhile, the folding positioning precision of the main body of the overpass platform is determined by measuring the alignment condition of the half-width theoretical line of the overpass platform and the center line 925 of the floating dock, and the positioning size of the overpass is checked by measuring the length direction of the overpass.
And after the overpass positioning is finished, the overpass and the floating dock body are sealed and welded and fixed by utilizing the precisely-blanking horse plate at the positions of the top deck of the overpass body, the upper supporting structure 23 and the lower supporting structure 24. The sealing horse board can be permanently reserved, and the workload related to horse board excision is reduced. And after the sealing of the overpass is finished, other overpass related equipment and outfitting pieces are installed, and finally the opening and closing debugging operation of the overpass is finished.
The construction method of the floating dock overpass solves the technical problems of large production amount and low precision of the overpass main body and the floating dock overpass installation in the prior art, and the construction method of the floating dock overpass has high production and folding precision, relatively less overhead construction operation and greatly reduces the safety control difficulty of construction.
The present invention is not limited to the above-described specific embodiments, and various modifications may be made by those skilled in the art without inventive effort from the above-described concepts, and are within the scope of the present invention.
Claims (9)
1. The construction method of the floating dock overpass is characterized by comprising a manufacturing method of the floating dock overpass and an installation method of the floating dock overpass;
The manufacturing method of the floating dock overpass comprises the following steps:
s1: manufacturing an overpass main body;
The manufacturing method of the overpass main body comprises the following steps:
q1: the overpass assembly is divided into a platform main body, a vertical support, an inclined support and a combined support assembly;
The combined support assembly comprises a first support tube and a second support tube which are arranged at a certain angle, and the platform main body comprises a head part Ping Taizu and a tail part Ping Taizu;
Q2: assembling and manufacturing, namely respectively manufacturing a platform main body, a vertical support, an inclined support and a combined support assembly divided by the Q1;
q3: surveying an assembly ground sample line of the overpass main body on a total group field;
q4: completing the total assembly operation of the overpass main body according to the Q3 survey overpass main body assembly ground sample line;
A platform main body is welded between the head part Ping Taizu and the tail part Ping Taizu, one end of the vertical support is welded with the tail part platform in an assembling way, the other end of the vertical support is welded with the first support tube, two sections of the inclined support are welded with each other, the top of the inclined support is welded with the head part platform in an assembling way, and the bottom of the inclined support is welded with the second support tube;
s2: simulating the folding state of the overpass, and trimming the folding port structural allowance of the upper supporting structure and the lower supporting structure;
s3: an upper supporting structure, a lower supporting structure and a slewing mechanism of the overpass main body are arranged on a total assembly field;
the installation method of the floating dock overpass comprises the following steps:
T1: the overpass is surveyed and the ground pattern is folded in the dock,
T2: and (3) accurately positioning the overpass according to the folding pattern line of the overpass, and assembling and welding the overpass on the floating dock.
2. The method of claim 1, wherein the platform break between the head Ping Taizu and tail Ping Taizu is provided at a location where the deck plate thickness varies and at a location where the deck plate abuts.
3. The method for constructing a floating dock overpass according to claim 1, wherein the vertical support and the diagonal support are divided into the same group by the length of the round pipe with the maximum processing capacity as the dividing basis, avoiding the complex area of the structure, and the assembling and welding areas between the vertical support, the diagonal support and the platform main body.
4. The construction method of the floating dock overpass according to claim 1, wherein the vertical support and the diagonal support in Q2 are formed by welding cylinders, angle steel tools are respectively installed at the upper end and the lower end of each cylinder, and the center positions of the cylinders are marked on the angle steel tools.
5. The method of constructing a floating dock overpass of claim 1, wherein said overpass body assembly spline of Q3 comprises: the device comprises a vertical support tube central line ground wire, an inclined support tube central line ground wire, an overpass top plate theoretical ground wire, a slewing mechanism central shaft ground wire and a calibration line.
6. The method of claim 1, wherein the overall group work of the overpass in Q4 is a side-mounted overall group on the overall group site.
7. The method of claim 1, wherein the bridge folding guide plate is installed on the dock wall to be welded in T2.
8. The method of claim 1, wherein the survey overpass in T1 is performed by folding the geodesic line at the actual location of the hull centreline of the floating dock and the dock wall top seal.
9. The method for constructing a floating dock overpass of claim 1, wherein the floating dock overpass and the floating dock are welded by a horse plate in T2, and the horse plate remains on the floating dock overpass and the floating dock after the installation is completed.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628610A (en) * | 2008-07-18 | 2010-01-20 | 上海船厂船舶有限公司 | Method for positioning dockyard overbridge |
| CN109533196A (en) * | 2018-11-15 | 2019-03-29 | 青岛北海船舶重工有限责任公司 | A kind of hull steel structured hinge installation method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2009055A (en) * | 1977-09-05 | 1979-06-13 | Walters R G | A Floating Dock |
| JP6177332B2 (en) * | 2012-09-21 | 2017-08-09 | ソレタンシュ フレシネＳｏｌｅｔａｎｃｈｅ Ｆｒｅｙｓｓｉｎｅｔ | Dock building apparatus and construction method using the building apparatus |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628610A (en) * | 2008-07-18 | 2010-01-20 | 上海船厂船舶有限公司 | Method for positioning dockyard overbridge |
| CN109533196A (en) * | 2018-11-15 | 2019-03-29 | 青岛北海船舶重工有限责任公司 | A kind of hull steel structured hinge installation method |
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