CN113373811A - Manufacturing method of connecting section at top of suspension bridge steel tower - Google Patents
Manufacturing method of connecting section at top of suspension bridge steel tower Download PDFInfo
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- CN113373811A CN113373811A CN202110588770.2A CN202110588770A CN113373811A CN 113373811 A CN113373811 A CN 113373811A CN 202110588770 A CN202110588770 A CN 202110588770A CN 113373811 A CN113373811 A CN 113373811A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The application provides a method for manufacturing a connecting section at the top of a steel tower of a suspension bridge, which comprises the following steps: inversely assembling the tower top connecting sections, manufacturing a jig frame for inversely assembling, and marking web positions of the tower top connecting sections and positioning points of joint positions of all sections; blanking each part required by the tower top connecting section; inversely assembling the tower top connecting section; setting out the positioning lines of the outer wall plates on the bearing plate, and installing four outer wall plates; assembling a plurality of longitudinal stiffeners; after the tower top connecting section is assembled, retesting the elevation and the corresponding coordinate point of the tower top connecting section by using a measuring instrument; and arranging a movable end milling jig frame, arranging the manufactured tower top connecting section on the movable end milling jig frame, and performing end milling on a bearing plate of the tower top connecting section. The method reduces the pre-assembly process, and can accurately position each segment; the construction environment and the welding position are optimized, and the problem that the overall precision and the welding quality of the tower top connecting section are difficult to guarantee is solved.
Description
Technical Field
The application relates to the field of buildings, in particular to a method for manufacturing a connecting section at the top of a steel tower of a suspension bridge.
Background
The top connecting section of the suspension bridge steel tower is of a top structure of the steel tower and is used for arranging a cable saddle of a main cable of the suspension bridge. The top of the tower linkage segment is connected with cable saddle bottom saddle, and the inside strengthening rib of linkage segment is intensive, and steel sheet thickness is big, and top of the tower bearing plate and cable saddle bed plate contact surface require to level, and the preparation degree of difficulty is big.
The existing manufacturing method for more connecting sections at the top of the tower is as follows: and (2) adopting single-section vertical assembly, performing combined pre-assembly after the single sections are manufactured, performing end face milling (hereinafter referred to as end milling) on each single-section bearing plate after the pre-assembly inspection is qualified, and simultaneously, because the area of each single-section bearing plate is large, the processing size range of end milling equipment is required to be larger than the size of the single-section bearing plate, otherwise, end milling cannot be performed, and further, the manufacturing requirements cannot be met.
Disclosure of Invention
One of the objectives of the present application is to provide a method for manufacturing a connecting section at the top of a suspension bridge steel tower, which aims to solve the problem of difficulty in manufacturing the existing connecting section at the top of the tower.
The technical scheme of the application is as follows:
a manufacturing method of a suspension bridge steel tower top connecting section comprises the following steps:
firstly, dividing a whole tower top connecting section into a plurality of sections according to hoisting and transporting capacity;
step two, performing inversion assembly on the tower top connecting section, manufacturing a jig frame for inversion assembly, and marking the web position of the tower top connecting section and positioning points of joint positions of all sections; after marking is finished, blanking is carried out on all parts needed by the tower top connecting section;
step three, inversely assembling the tower top connecting section: laying a top pressure bearing plate of the tower top connecting section, installing a plurality of webs and a plurality of longitudinal partition plates on the jig frame according to the marked interface positioning points of the webs, and finishing welding of connecting welding seams between the corresponding webs and the longitudinal partition plates; setting out positioning lines of the outer wall plates on the pressure bearing plate, installing four outer wall plates, and welding connecting welding seams between the corresponding outer wall plates and the web plates or the longitudinal partition plates; assembling a plurality of longitudinal stiffeners;
fourthly, after the tower top connecting section is assembled, retesting the elevation and the corresponding coordinate point of the tower top connecting section by using a measuring instrument;
step five, arranging a movable end milling jig frame, placing the manufactured tower top connecting section on the movable end milling jig frame, and performing end milling on the bearing plate of the tower top connecting section.
As one technical solution of the present application, in the second step, the inverted assembly jig is a horizontal jig.
As a technical scheme of this application, in step two, adopt numerical control cutting machine or plasma cutting machine to right each required spare part of top of the tower linkage segment carries out the unloading, spare part includes web, vertical baffle, outer wallboard and vertical stiffening rib.
In a third step, a plurality of webs are respectively installed on the bearing plate in parallel at intervals; the longitudinal partition plates are respectively arranged on the bearing plate in parallel in rows at intervals, the side wall of each longitudinal partition plate is sequentially and vertically welded on the side surface of the web plate, and a grid structure is formed by the longitudinal partition plates and the web plate; the longitudinal reinforcing ribs are respectively arranged on the bearing plate in parallel at intervals in rows, and the side wall of each longitudinal reinforcing rib is sequentially and vertically welded at the middle part of the side surface of the longitudinal partition plate; the four outer wall plates are arranged on the peripheral sides of the surfaces of the bearing plates in a surrounding mode and are respectively welded with the web plates, the longitudinal reinforcing ribs and the free side ends of the longitudinal partition plates.
As a technical scheme of the application, in step four, the measuring instrument comprises a level, a theodolite, a total station or a three-dimensional laser scanner.
As a technical scheme of this application, in step five, the removal end mills the bed-jig and includes adjustable portal frame and mobilizable walking bed-jig, adjustable portal frame fixed mounting in on the walking bed-jig, the top of the tower linkage segment is fixed set up in on the adjustable portal frame.
As a technical scheme of the application, the traveling jig frame comprises four gear rollers movably arranged on two gear tracks which are parallel and spaced, two rotating shafts which are parallel and spaced, four cycloidal pin gear reducers and two supports which are parallel and spaced; the rotating shaft is connected with two cycloidal pin gear speed reducers at intervals, and two ends of the rotating shaft penetrate through the cycloidal pin gear speed reducers respectively to be connected with the gear rollers in a transmission way; the support is fixedly arranged on the tops of the two cycloidal pin gear speed reducers; the adjustable portal frame is fixedly arranged on the two supports.
As a technical scheme of the application, the adjustable portal frame comprises four jacking structures, two beams which are parallel and spaced, and two longitudinal beams which are parallel and spaced; two jacking structures are arranged on the upper surface of each support at intervals; the cross beam is arranged on the top of the jacking structure, and the jacking structure is in transmission connection with the cross beam and used for driving the cross beam to lift; two ends of each longitudinal beam are respectively and vertically fixedly connected between the two cross beams and form a rectangular frame structure together with the cross beams; the adjustable portal frame is fixedly arranged on the rectangular frame structure.
As a technical scheme of the application, the jacking structure comprises four hydraulic jacks, four bases, four first supporting seats and four second supporting seats; the two hydraulic jacks are arranged on the upper surface of the support at intervals, the base is fixedly arranged on the transmission end of the top of each hydraulic jack, and the first support seat is fixedly arranged on the upper surface of the base; the second supporting seat is arranged on one side wall of the first supporting seat through a connecting shaft; the rectangular frame structure is welded on the top of the second support seat.
The beneficial effect of this application:
according to the manufacturing method of the connecting section at the top of the suspension bridge steel tower, the pre-assembly process is reduced through the integral inverted assembly technology, and each section can be accurately positioned; the construction environment and the welding positions are optimized, a large number of overhead welding positions are converted into horizontal and horizontal welding positions, and the problem that the overall precision and the welding quality of the tower top connecting section are difficult to guarantee is solved. Through setting up the removal end and milling the bed-jig, can be as required, the different end milling angle of each section of branch of quick nimble regulation guarantees the end milling precision, has effectively solved the technical problem that the large tracts of land end milling flatness of top of the tower linkage segment is difficult to guarantee, can make the machined part size not receive equipment machining dimension scope restriction simultaneously, has promoted the machining capacity scope of existing equipment greatly.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of the overall structure of an overhead connection section provided in an embodiment of the present application;
fig. 2 is an inverted assembly schematic view of a pressure bearing plate according to an embodiment of the present application;
FIG. 3 is a schematic view of an inverted assembly of a web and a longitudinal partition according to an embodiment of the present disclosure;
fig. 4 is an inverted assembly view of the outer wall panel according to the embodiment of the present application;
FIG. 5 is a schematic view of an inverted longitudinal ribbed assembly according to an embodiment of the present disclosure;
fig. 6 is a schematic perspective view of a mobile end milling jig according to an embodiment of the present application;
FIG. 7 is a schematic perspective view of an adjustable portal frame according to an embodiment of the present disclosure;
fig. 8 is a schematic end milling view of a bearing plate of a tower top connecting section provided in an embodiment of the present application.
Icon: 1-a bearing plate; 2-a web; 3-longitudinal partition board; 4-an outer wall plate; 5-longitudinal stiffeners; 6-gear track; 7-gear rollers; 8-a rotating shaft; 9-cycloidal-pin gear speed reducer; 10-a support; 11-hydraulic jack; 12-a cross beam; 13-a stringer; 14-a base; 15-a first support; 16-bolt; 17-a second support seat; 18-a connecting shaft; 19-a milling cutter disc; 20-overhead connecting section.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like refer to orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.
Further, in the present application, unless expressly stated or limited otherwise, the first feature may be directly contacting the second feature or may be directly contacting the second feature, or the first and second features may be contacted with each other through another feature therebetween, not directly contacting the second feature. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example (b):
referring to fig. 1 and fig. 2 to 8, the present application provides a method for manufacturing a connecting section at the top of a steel tower of a suspension bridge, including the following steps:
firstly, dividing the whole tower top connecting section 20 into a plurality of sections according to the hoisting and transporting capacity;
step two, performing inversion assembly on the tower top connecting section 20, manufacturing a jig frame for inversion assembly, and marking the web 2 position of the tower top connecting section 20 and positioning points of joint positions of all sections; after marking is finished, blanking is carried out on all parts needed by the tower top connecting section 20;
step three, inversely assembling the tower top connecting section 20: firstly, laying a top pressure bearing plate 1 of a tower top connecting section 20, installing a plurality of webs 2 and a plurality of longitudinal partition plates 3 on a jig frame according to interface positioning points of the marked webs 2, and finishing welding of connecting welding lines between the corresponding webs 2 and the longitudinal partition plates 3; setting out the positioning lines of the outer wall plates 4 on the pressure bearing plate 1, installing the four outer wall plates 4, and finishing welding the corresponding outer wall plates 4 with the connecting welding lines between the web plates 2 or the longitudinal partition plates 3; assembling a plurality of longitudinal stiffeners 5;
fourthly, after the tower top connecting section 20 is assembled, retesting the elevation and the corresponding coordinate point of the tower top connecting section 20 by using a measuring instrument;
and step five, arranging a movable end milling jig frame, placing the manufactured tower top connecting section 20 on the movable end milling jig frame, and performing end milling on the bearing plate 1 of the tower top connecting section 20.
In step two, the inverted assembly jig may be a horizontal jig of the prior art.
Meanwhile, in the second step, each required part of the tower top connecting section 20 is blanked by using a numerical control cutting machine or a plasma cutting machine, and the part comprises a web 2, a longitudinal partition plate 3, an outer wall plate 4 and a longitudinal stiffening rib 5.
Further, in the third step, a plurality of webs 2 are respectively installed on the bearing plate 1 in parallel at intervals; the longitudinal partition plates 3 are respectively arranged on the bearing plate 1 in parallel at intervals in rows, the side wall of each longitudinal partition plate 3 is sequentially and vertically welded on the side surface of the web plate 2, and the longitudinal partition plates and the web plate 2 form a grid structure; the plurality of longitudinal reinforcing ribs are respectively arranged on the bearing plate 1 in parallel at intervals in rows, and the side wall of each longitudinal reinforcing rib is sequentially and vertically welded at the middle part of the side surface of the longitudinal partition plate 3; the four outer wall plates 4 are arranged around the surface of the pressure bearing plate 1 and are respectively welded with the free side ends of the web plate 2, the longitudinal reinforcing ribs and the longitudinal partition plates 3. The longitudinal partition plates 3, the web plates 2 and the longitudinal reinforcing ribs form a grid structure together.
In the fourth step, the measuring instrument may use a level, a theodolite, a total station or a three-dimensional laser scanner to perform measurement.
It should be noted that, in the fifth step, the movable end milling jig frame includes an adjustable portal frame and a movable traveling jig frame, the adjustable portal frame is fixedly installed on the traveling jig frame, and the tower top connecting section 20 is fixedly installed on the adjustable portal frame.
Furthermore, the walking jig frame comprises four gear rollers 7 movably arranged on two parallel spaced tracks, two parallel spaced rotating shafts 8, four cycloidal pin gear reducers 9 and two parallel spaced supports 10; two cycloidal pin gear speed reducers 9 are connected to the rotating shaft 8 at intervals, and two ends of the rotating shaft respectively penetrate through the cycloidal pin gear speed reducers 9 to be connected with gear rollers 7 in a transmission way; the support 10 is fixedly arranged on the top of the two cycloidal pin gear speed reducers 9; the adjustable portal frame is fixedly mounted on two supports 10. The support 10 is also made of a steel profile.
Meanwhile, the adjustable portal frame comprises four jacking structures, two beams 12 which are parallel and spaced and two longitudinal beams 13 which are parallel and spaced; two jacking structures are arranged on the upper surface of each support 10 at intervals; the beam 12 is arranged on the top of the jacking structure, and the jacking structure is in transmission connection with the beam 12 and used for driving the beam 12 to lift; two ends of each longitudinal beam 13 are respectively vertically and fixedly connected between the two cross beams 12 and form a rectangular frame structure with the cross beams 12; the adjustable portal frame is fixedly arranged on the rectangular frame structure. In addition, the cross beam 12 and the longitudinal beam 13 are both made of sheet materials into a T-shaped steel structure, are welded with each other into a frame form, are arranged at the upper part of the second supporting seat 17 and are welded and fixed with the second supporting seat.
Further, the jacking structure comprises four hydraulic jacks 11, four bases 14, four first supporting seats 15 and four second supporting seats 17; two hydraulic jacks 11 are installed on the upper surface of the support 10 at intervals, a base 14 is fixedly installed on a transmission end on the top of each hydraulic jack 11, the base 14 is made of a steel plate, and a first support seat 15 is fixedly installed on the upper surface of the base 14 through a plurality of bolts 16; the second supporting seat 17 is mounted on one side wall of the first supporting seat 15 through a connecting shaft 18; a rectangular frame structure is welded on top of the second support seat 17.
Specifically, this first supporting seat 15 and second supporting seat 17 are made by the corrosion plate, and the aperture equals the diameter of connecting axle 18 by the middle trompil of the two, and connecting axle 18 passes the trompil of first supporting seat 15 and second supporting seat 17 and connects the two, and first supporting seat 15 and second supporting seat 17 accessible connecting axle 18 carry out free rotation, and then adjust the angle of putting of adjustable portal frame to adjust the angle of putting of top of the tower linkage segment 20.
The end milling process of the bearing plate 1 is as follows:
(1) arranging two gear tracks 6 on a horizontal foundation or a platform in front of end milling equipment, wherein the gear tracks 6 are parallel to the disc surface of a milling cutter disc 19 on the end milling equipment, and arranging two groups of walking moulding beds on the gear tracks 6;
(2) fixing the adjustable portal frame on the walking jig frame;
(3) calculating the relative height difference of the hydraulic jacks 11 at the two ends of the support 10 of the walking jig frame according to the edge milling groove angle of the member to be processed, and adjusting the jacking height of each hydraulic jack 11 according to the relative height difference;
(4) placing the member on the adjustable portal frame, and locking or spot-welding the member and the adjustable portal frame by using a clamp; after the jacking height of each hydraulic jack 11 is adjusted, driving a frame consisting of a cross beam 12 and a longitudinal beam 13 to ensure that the surface of the bearing plate 1 is vertical to the horizontal plane;
(5) adjusting end milling equipment, wherein the disc surface of the milling cutter disc 19 works vertically to the horizontal plane;
(6) the traveling jig frame runs on the gear track 6, one end of the plate is close to the milling cutter disc 19, the feeding amount of the milling cutter disc 19 is adjusted, and milling processing is started;
(7) the milling cutter disc 19 is fixed, and the walking jig frame drives the component to slowly move from one end to the other end at a constant speed until the bearing plate 1 is milled.
In conclusion, the manufacturing method of the connecting section at the top of the suspension bridge steel tower reduces the pre-assembly process and can accurately position each section through the integral inverted assembly technology; the construction environment and the welding positions are optimized, a large number of overhead welding positions are converted into horizontal and horizontal welding positions, and the problem that the overall precision and the welding quality of the tower top connecting section 20 are difficult to guarantee is solved. Through setting up the removal end and milling the bed-jig, can be as required, the different end milling angle of each section of branch of quick nimble regulation guarantees the end milling precision, has effectively solved the technical problem that 20 large tracts of land end milling planeness of top of the tower linkage segment are difficult to guarantee, can make the machined part size not receive equipment machining size scope restriction simultaneously, has promoted the machining ability scope of existing equipment greatly.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. A manufacturing method of a connecting section at the top of a suspension bridge steel tower is characterized by comprising the following steps:
firstly, dividing a whole tower top connecting section into a plurality of sections according to hoisting and transporting capacity;
step two, inverting and assembling the tower top connecting sections, manufacturing a jig frame for inverted assembly, and marking web positions of the tower top connecting sections and positioning points of joint positions of all sections; after marking is finished, blanking is carried out on all parts needed by the tower top connecting section;
step three, inversely assembling the tower top connecting section: laying a top pressure bearing plate of the tower top connecting section, installing a plurality of webs and a plurality of longitudinal partition plates on the jig frame according to the marked interface positioning points of the webs, and finishing welding of connecting welding seams between the corresponding webs and the longitudinal partition plates; setting out positioning lines of the outer wall plates on the pressure bearing plate, installing four outer wall plates, and welding connecting welding seams between the corresponding outer wall plates and the web plates or the longitudinal partition plates; assembling a plurality of longitudinal stiffeners;
fourthly, after the tower top connecting section is assembled, retesting the elevation and the corresponding coordinate point of the tower top connecting section by using a measuring instrument;
step five, arranging a movable end milling jig frame, placing the manufactured tower top connecting section on the movable end milling jig frame, and performing end milling on the bearing plate of the tower top connecting section.
2. The method for manufacturing the overhead connecting section of the suspension bridge steel tower according to claim 1, wherein in the second step, the jig frame for inverted assembly is a horizontal jig frame.
3. The method for manufacturing the top connection section of the suspension bridge steel tower according to claim 1, wherein in the second step, a numerical control cutting machine or a plasma cutting machine is used for blanking each required part of the top connection section, wherein the part comprises a web plate, a longitudinal partition plate, an outer wall plate and a longitudinal stiffening rib.
4. The method for manufacturing the connecting section at the top of the suspension bridge steel tower according to claim 1, wherein in the third step, a plurality of webs are respectively installed on the bearing plate in parallel at intervals; the longitudinal partition plates are respectively arranged on the bearing plate in parallel in rows at intervals, the side wall of each longitudinal partition plate is sequentially and vertically welded on the side surface of the web plate, and a grid structure is formed by the longitudinal partition plates and the web plate; the longitudinal reinforcing ribs are respectively arranged on the bearing plate in parallel at intervals in rows, and the side wall of each longitudinal reinforcing rib is sequentially and vertically welded at the middle part of the side surface of the longitudinal partition plate; the four outer wall plates are arranged on the peripheral sides of the surfaces of the bearing plates in a surrounding mode and are respectively welded with the web plates, the longitudinal reinforcing ribs and the free side ends of the longitudinal partition plates.
5. The method for manufacturing the overhead connection section of the steel tower of the suspension bridge according to claim 1, wherein in step four, the measuring instrument comprises a level, a theodolite, a total station or a three-dimensional laser scanner.
6. The method for manufacturing the top connection section of the suspension bridge steel tower according to claim 1, wherein in the fifth step, the movable end milling jig comprises an adjustable portal frame and a movable traveling jig frame, the adjustable portal frame is fixedly installed on the traveling jig frame, and the top connection section is fixedly arranged on the adjustable portal frame.
7. The method for manufacturing the connecting section at the top of the suspension bridge steel tower according to claim 6, wherein the traveling jig frame comprises four gear rollers, two rotating shafts, four cycloidal pin gear reducers and two supports, wherein the four gear rollers are movably arranged on two gear tracks which are spaced in parallel; the rotating shaft is connected with two cycloidal pin gear speed reducers at intervals, and two ends of the rotating shaft penetrate through the cycloidal pin gear speed reducers respectively to be connected with the gear rollers in a transmission way; the support is fixedly arranged on the tops of the two cycloidal pin gear speed reducers; the adjustable portal frame is fixedly arranged on the two supports.
8. The method of claim 7, wherein the adjustable gantry includes four jacking structures, two parallel spaced beams and two parallel spaced stringers; two jacking structures are arranged on the upper surface of each support at intervals; the cross beam is arranged on the top of the jacking structure, and the jacking structure is in transmission connection with the cross beam and used for driving the cross beam to lift; two ends of each longitudinal beam are respectively and vertically fixedly connected between the two cross beams and form a rectangular frame structure together with the cross beams; the adjustable portal frame is fixedly arranged on the rectangular frame structure.
9. The method for manufacturing the top connecting section of the suspension bridge steel tower according to claim 8, wherein the jacking structure comprises four hydraulic jacks, four bases, four first supporting seats and four second supporting seats; the two hydraulic jacks are arranged on the upper surface of the support at intervals, the base is fixedly arranged on the transmission end of the top of each hydraulic jack, and the first support seat is fixedly arranged on the upper surface of the base; the second supporting seat is arranged on one side wall of the first supporting seat through a connecting shaft; the rectangular frame structure is welded on the top of the second support seat.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110588770.2A CN113373811B (en) | 2021-05-28 | 2021-05-28 | Manufacturing method of overhead connecting section of suspension bridge steel tower |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110588770.2A CN113373811B (en) | 2021-05-28 | 2021-05-28 | Manufacturing method of overhead connecting section of suspension bridge steel tower |
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| CN113373811B CN113373811B (en) | 2023-07-25 |
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| CN113373811B (en) | 2023-07-25 |
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