CN114673088B - Construction method applied to catwalk of space main cable suspension bridge - Google Patents
Construction method applied to catwalk of space main cable suspension bridge Download PDFInfo
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- CN114673088B CN114673088B CN202210216721.0A CN202210216721A CN114673088B CN 114673088 B CN114673088 B CN 114673088B CN 202210216721 A CN202210216721 A CN 202210216721A CN 114673088 B CN114673088 B CN 114673088B
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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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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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Abstract
The invention provides a construction method applied to a catwalk of a space main cable suspension bridge, and relates to the technical field of bridge engineering. The invention comprises a catwalk installation construction method and an anti-wind system installation construction method, wherein the catwalk construction method comprises a catwalk integral construction method and a catwalk separation construction method, compared with the traditional suspension bridge, the distance value of main cables is a non-constant value, and the catwalk installation construction method can change the catwalk from integral to separated so as to adapt to the construction requirements of the suspension bridge main cable construction and the steel box girder section installation; meanwhile, the installation method of the wind-resistant system can well realize that the wind-resistant system and the catwalk of the suspension bridge are matched when the catwalk of the suspension bridge is of an integral structure, can effectively solve the problem of wind-resistant stability of the integral catwalk of the space main cable suspension bridge in a complex wind field environment, and enhances the longitudinal and transverse rigidity of the integral catwalk.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a construction method applied to a catwalk of a space main cable suspension bridge.
Background
The catwalk is a linear temporary construction passageway which is erected below the main cable and parallel to the main cable during construction of the suspension bridge. The high-altitude scaffold is a high-altitude scaffold for construction work of constructors, and is a construction platform of a main cable system and even the whole upper structure of a suspension bridge. The constructor can finish important tasks such as rope strand traction, rope adjustment, saddle shaping, rope tightening, rope clamp and sling installation, box girder hoisting, site connection, main rope winding, protection coating and the like. One of the upstream and the downstream is generally U-shaped in section, long and narrow and has some shake, so the cat walk is called, and English is catwalk. It is an extremely important temporary facility in suspension bridge construction, and the bridge will be dismantled after completion. The two main cables of the conventional suspension bridge are generally arranged in parallel, so that the catwalk for the conventional suspension bridge has a separated structure with fixed catwalk distance, and the conventional fixed catwalk cannot be applied to the suspension bridge with the fixed catwalk for forming an oval arrangement by changing the catwalk distance. And a certain number of transverse channels are arranged between the catwalk structures of the traditional suspension bridge fixed separation type, so that the catwalk wind resistance during construction is improved, and the type of wind resistance structure is not suitable for catwalk structures with variable distances.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a construction method applied to a catwalk of a space main cable suspension bridge, which is used for solving the problems in the background art.
To achieve the above and other related objects, the present invention provides a construction method for a catwalk of a space main cable suspension bridge, including an installation construction method for a catwalk and an installation construction method for an anti-wind system;
the catwalk installation construction method comprises an integral construction method of catwalk and a separation construction method of catwalk, wherein the catwalk is of an integrated structure in the integral construction process, the integral catwalk is separated into two independent catwalk through the separation construction method of catwalk, and the integral construction method of catwalk comprises the following steps:
s11, conveying the anchoring block to the tower top to be connected with the pre-buried climbing cone to finish pre-installation, anchoring the anchoring block on the tower top by using finish rolling screw steel, and connecting the anchoring beam with the large pull rod and the small pull rod after the assembly of the anchoring beam and the large pull rod and the small pull rod is finished;
s12, pre-erecting a pilot rope, and crossing the sea by towing the pilot rope by a shipThe bank is connected with a first index +.>The bank and the K bank are respectively two opposite banks of the suspension bridge, and the second guide rope is driven by the first guide rope to be erected at the +.>Between the bank and K bank, the third guide rope is driven by the second guide rope to be erected at +.>The cable diameters of the guide cable, the first guide cable, the second guide cable and the third guide cable are sequentially increased between the bank and the K bank;
s13, pulling the carrier bearing rope through the third guide ropeThe shore is towed to the K shore and anchored on the top of the K shore; after the bracket bearing rope is erected, a bracket positioning rope is erected, the bracket positioning rope is connected with a third guide rope, the bracket is hung on the bracket bearing rope, connecting points are arranged on the bracket positioning rope at intervals in the length direction, and each bracket is correspondingly connected with each connecting point;
s14, erecting catsTrack load-bearing cable, catwalk load-bearing cable is pulled from by a third guide cable pullerThe shore is towed to the K shore, two ends of the catwalk bearing rope are connected with the small pull rod, the catwalk bearing rope is sequentially erected according to the sequence of bilateral symmetry and bilateral straddling symmetry, and the erection sequence is adjusted according to the deviation condition of the main towers of the two shore in the erection process; the front end position of the catwalk bearing ropes connected with the small pull rods is provided with a deflection steel frame to adjust the distance between the catwalk bearing ropes;
s15, dragging a portal frame bearing rope;
s16, paving a catwalk surface net on the catwalk bearing rope;
s17, installing a catwalk railing and a catwalk portal, and completing installation of the whole catwalk;
the catwalk is provided with an anti-wind system under the condition of being in an integral type, and the installation construction method of the anti-wind system comprises the following steps:
s21, erecting an anti-wind cable, and utilizing a cable strand traction system to draw the anti-wind cable to the bracket;
s22, connecting a catwalk and an anti-wind cable by using an anti-wind suspender;
s23, the windshields are pulled to the vicinity of the anchoring devices by utilizing the windshields at the top of the tower and the steering device,
s24, connecting an anchor head of the anti-wind cable to a second pull rod of the anchoring device through tower crane matching, tensioning the anti-wind cable in the anchoring device through a jack, and installing an anchoring steel belt after tensioning is completed to complete the fixation of the anti-wind cable;
the catwalk separation construction method comprises the steps of first carrying out traction on a main cable strand, then installing a pushing system, and pushing the catwalk from the middle to two sides through the pushing system to form a separated catwalk structure.
Optionally, in S12, a guide rope is erected in advance on the K bank, anderecting a first guide rope on the shore in advance, and towing one end of the guide rope to +.>The shore is connected with the first guide rope, and then the first guide rope is driven by a winch to pull the first guide rope to the K shore; pre-erecting a second guide rope on the K bank, connecting the second guide rope with the first guide rope, driving the first guide rope by a winch to pull the second guide rope to the +.>A shore; at->And (3) erecting a third guide rope in advance on the shore, connecting the third guide rope with the second guide rope, driving the second guide rope by a winch to pull the third guide rope to the K shore, and completing the pulling.
Optionally, in S13, the brackets are uniformly arranged at intervals of 100 meters, and the bracket positioning ropes are guided by the third guide ropeAnd (3) pulling the support to the K bank, wherein when the support positioning rope is pulled out of 100 meters, one support is connected with the support positioning rope, and the support positioning rope is sequentially pulled to the top of the K bank.
Optionally, in S11, the whole assembly of the anchoring beam, the large pull rod and the small pull rod is lifted to the top of the tower by using a tower crane, and is connected with the anchoring block through a steel pin, and meanwhile, two ends of the anchoring beam are lifted on a portal of the top of the tower by using a steel rope and a chain block, and the anchoring block is adjusted to the inclination angle of the catwalk by using the chain block.
Optionally, the catwalk bearing ropes are subjected to sag adjustment in a triangular elevation measurement mode, the mid-span sag of a single bearing rope is measured in sequence, the mid-span sag adjustment is adjusted by tensioning small pull rods at two ends of the catwalk bearing ropes, and the two ends of the catwalk bearing ropes of the same mid-span are symmetrically tensioned at the same time until the corresponding sag positions are adjusted; the side-span catwalk bearing ropes are adjusted through tensioning small pull rods at the top of the tower.
Optionally, the catwalk face net is laid and is laid by adopting a sliding method, the face net is lifted to the tower top platform by the tower crane, the face net is manually conveyed to the catwalk bearing rope, then the anti-slip battens are bound and the square steel is installed, the middle span is used for laying the tower top deflection steel frame to the tower top section by using the wood boards and the face net, meanwhile, the two sides of the section are provided with the protection rails, the side span is used for laying the adjusting pull rod to the tower top section by using the wood boards and the face net, the two sides of the section are also provided with the protection rails, the counterweight is arranged at the front end of the catwalk face net when the middle span face net slides downwards, the lowering of the catwalk face layer is controlled by using the tower top winch, and when the catwalk face net cannot be freely lowered, the catwalk face net is pulled to be lowered by using the traction system.
Optionally, after the pavement layer is laid, the catwalk railing is fixedly installed by bolts, the catwalk railing is arranged on the catwalk at intervals, the railing rope and the railing rope are installed on the catwalk railing in a traction mode, and then the railing net is fixed with the catwalk bearing rope, the railing rope and the catwalk railing by using binding belts.
Optionally, the installing step of installing the catwalk door frame comprises the following steps: (1) On the K bank andassembling catwalk portal frames on the tower top approach bridges on two sides of the bank; (2) Hoisting the catwalk portal frame to the tower top, connecting the catwalk portal frame with the portal rope through a U-shaped bolt, connecting the front end of the catwalk portal with a traction steel rope, and connecting the rear end of the catwalk portal frame with a counter-pulling steel rope of a winch at the tower top; (3) Firstly, a first catwalk door frame is pulled to a midspan position, and the catwalk door frame is connected with a lower cross beam through a steel pin; (4) And installing the rest catwalk door frames to the tower tops of the midspan to the two banks and to each position of the anchorage part.
Optionally, the wind-resistant hanging parts at all positions select to cut fixed steel ropes with corresponding lengths from the steel rope disc by using cutting pieces according to the initial installation position conditions, and after the wind-resistant hanging parts are installed, the line shape of the wind-resistant ropes is controlled by adjusting the length of the adjusting chain on the wind-resistant hanging parts.
Alternatively, the anchoring devices are mounted at both ends of the bridge tower platform, and each steering device is mounted on the bridge tower platform between the two anchoring devices and the position of the overhead hoist projected on the bridge tower platform.
As described above, the construction method applied to the catwalk of the space main cable suspension bridge has at least the following beneficial effects:
the invention provides a construction method for a catwalk of a space main cable suspension bridge, which comprises an installation construction method of the catwalk and an installation construction method of an anti-wind system, wherein the catwalk construction method comprises an integral construction method of the catwalk and a separation construction method of the catwalk; meanwhile, the installation method of the wind-resistant system can well realize that the wind-resistant system and the catwalk of the suspension bridge are matched when the catwalk of the suspension bridge is of an integral structure, can effectively solve the problem of wind-resistant stability of the integral catwalk of the space main cable suspension bridge in a complex wind field environment, and enhances the longitudinal and transverse rigidity of the integral catwalk.
Drawings
FIG. 1 is a schematic diagram illustrating the construction of a first guide cable driven by a guide cable according to the present invention;
FIG. 2 is a schematic view showing the mating of the anchor beam and the anchor block of the present invention;
fig. 3 shows a schematic view of the arrangement of the anchoring device and the steering device according to the invention.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Please refer to fig. 1 to 3. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the invention, are included in the spirit and scope of the invention which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
The following examples are given by way of illustration only. Various embodiments may be combined and are not limited to only what is presented in the following single embodiment.
Referring to fig. 1 and 2, the invention provides a construction method applied to a catwalk of a space main cable suspension bridge, which comprises a catwalk installation construction method and an anti-wind system installation construction method; the catwalk installation construction method comprises an integral construction method of catwalk and a separation construction method of catwalk, wherein the catwalk is of an integrated structure in the integral construction process, the integral catwalk is separated into two independent catwalk through the separation construction method of catwalk, and the integral construction method of catwalk comprises the following steps:
s11, conveying the anchoring block to the tower top to be connected with the pre-buried climbing cone to finish pre-installation, anchoring the anchoring block on the tower top by using finish rolling screw steel, and connecting the anchoring beam with the large pull rod and the small pull rod after the assembly of the anchoring beam and the large pull rod and the small pull rod is finished;
s12, pre-erecting a pilot rope, and crossing the sea by towing the pilot rope by a shipThe bank is connected with a first index +.>The bank and the K bank are respectively two opposite banks of the suspension bridge, and the second guide rope is driven by the first guide rope to be erected at the +.>Between the bank and K bank, the third guide rope is driven by the second guide rope to be erected at +.>The cable diameters of the pilot cable 4-1, the first guide cable 4-2, the second guide cable and the third guide cable are sequentially increased between the banks and the K banks;
s13, pulling the carrier bearing rope through the third guide ropeThe shore is towed to the K shore and anchored on the top of the K shore; after the bracket bearing rope is erected, a bracket positioning rope is erected, the bracket positioning rope is connected with a third guide rope, the bracket is hung on the bracket bearing rope, connecting points are arranged on the bracket positioning rope at intervals in the length direction, and each bracket is correspondingly connected with each connecting point;
s14, erecting a catwalk bearing rope, wherein the catwalk bearing rope passes through a puller of a third guide rope to be pulled outThe shore is towed to the K shore, two ends of the catwalk bearing rope are connected with the small pull rod, the catwalk bearing rope is sequentially erected according to the sequence of bilateral symmetry and bilateral straddling symmetry, and the erection sequence is adjusted according to the deviation condition of the main towers of the two shore in the erection process; the front end position of the catwalk bearing ropes connected with the small pull rods is provided with a deflection steel frame to adjust the distance between the catwalk bearing ropes;
s15, dragging a portal frame bearing rope;
s16, paving a catwalk surface net on the catwalk bearing rope;
s17, installing a catwalk railing and a catwalk portal, and completing installation of the whole catwalk;
the catwalk is provided with an anti-wind system under the condition of being in an integral type, and the installation construction method of the anti-wind system comprises the following steps:
s21, erecting an anti-wind cable, and utilizing a cable strand traction system to draw the anti-wind cable to the bracket;
s22, connecting a catwalk and an anti-wind cable by using an anti-wind suspender;
s23, the windshields are pulled to the vicinity of the anchoring devices by utilizing the windshields at the top of the tower and the steering device,
s24, connecting an anchor head of the anti-wind cable to a second pull rod of the anchoring device through tower crane matching, tensioning the anti-wind cable in the anchoring device through a jack, and installing an anchoring steel belt after tensioning is completed to complete the fixation of the anti-wind cable;
the catwalk separation construction method comprises the steps of first carrying out traction on a main cable strand, then installing a pushing system, and pushing the catwalk from the middle to two sides through the pushing system to form a separated catwalk structure.
Because the catwalk bearing rope has larger rope diameter and heavy weight, if the direct erection operation is very troublesome to construct, the formation of a traction system is realized by sequentially connecting and erecting the guide rope 4-1, the first guide rope 4-2, the second guide rope and the third guide rope with sequentially increased rope diameters, the construction operation is more convenient, the erection of a thick rope is also more facilitated, and the subsequent catwalk bearing rope and other ropes can be better pulled by sequentially pulling the small ropes with the gradual rope diameter; the catwalk bearing rope is hung on the sea surface in order to prevent the catwalk bearing rope from influencing the safety of the sea surface due to overlarge dead weight in the traction process, so that the catwalk bearing rope is supported by the bracket in the traction process, the weight of the catwalk bearing rope is transferred to the bracket bearing rope, and the sag and the tension of the catwalk bearing rope are reduced; the brackets are sequentially connected in a certain interval distance through the bracket positioning ropes, so that the distributed installation of the brackets can be realized more uniformly and effectively. The installation body is arranged on the bridge tower, the end part of the catwalk bearing rope is connected with an anchoring beam 2-1, the anchoring beam 2-1 is provided with a large pull rod 2-2, one end of the large pull rod 2-2 is provided with a connector, and the connector is connected with the hinge shaft. In the construction process of the traditional suspension bridge, the catwalk bearing rope is directly connected with the top of a cable saddle or a concrete structure after being connected with the small pull rod 2-3, and the tensile stress of the bearing rope is very large, so that the direct fixed point connection mode is unstable for a long time, the concrete structure at the top of the tower is easy to pull apart to cause serious safety accidents, the anchoring combined structure in the scheme can be applied to a space main cable suspension bridge and is connected with the top of the tower through the anchoring block 3-2, the bearing rope and the top of the tower are converted into the connection mode through the transmission in the middle of the anchoring block 3-2 in a symmetrical connection mode, the risk that the concrete structure at the top of the tower is directly pulled apart due to the stress concentration is reduced, the connection is more stable, and the accident risk of construction is reduced. The combination of the anchoring beam 2-1, the large pull rod 2-2 and the small pull rod 2-3 realizes the adjustment of the installation connection of the catwalk bearing rope, namely the adjustment of the position parameters such as length angle and the likeThe big pull rod is rotatably arranged on the anchoring block of the bridge tower to adjust the angle of the big pull rod, the big pull rod and the small pull rod are matched with the displacement of the anchoring beam, so that the length distance from the bearing rope to the tower top is changed, and the length of the bearing rope is adjusted. In order to facilitate adjustment of catwalk linearity, the catwalk is installed according to the design reference position of the big pull rod and the small pull rod in assembly, the length of the big pull rod at the middle span side is 8700mm, and the length of the small pull rod is 3700mm; the length of the big pull rod at the side of the side span is 7500mm, and the length of the small pull rod is 3700mm; the portal frame bearing ropes are separated, the K shore spans four portal frame bearing ropes, single ropes are in the same disc, and each length is 320.4725m; four portal load-bearing ropes of midspan, each length 1185.6374m, four rope reels, K bank andtwo discs on each land; />The bank spans four portal bearing ropes, single ropes and discs, and each length is 298.288m. The traction mode of the load-bearing ropes of the portal frame of the middle span and the side span is the same as that of the catwalk load-bearing ropes, the description is not repeated here, after the anchoring side span load-bearing ropes at the anchorage are pulled in place, the portal frame load-bearing ropes are placed into a cable saddle on the anchorage portal frame, and then the rope ends are connected with embedded parts on the anchorage through chicken heart rings. When the tower top is connected, the rope head of the tower top is placed in a rope saddle on the tower top portal, the rope head is connected with a tower top winch, the portal bearing is adjusted to the designed sagging degree through the winch, and the rope is used for being temporarily anchored on the tower top portal. After the load-bearing ropes of the middle span and the side span portal are adjusted to the designed sag and anchored, the load-bearing ropes of the middle span and the side span are connected by rope clamps at the top of the tower; and (5) detaching the bracket and the bracket positioning rope after the catwalk bearing rope is erected. The mid-span bracket is removed by winding one end of the positioning rope head at +.>And on the tower top winch, the rope head at the other end is released from the anchoring point and is connected with the puller. One by utilizing a traction system and a tower top winchThe bracket and the bracket positioning rope are retracted, and the bracket positioning rope is at the same time->Dismantling the tower top of the tower; the invention provides a construction method for a catwalk of a space main cable suspension bridge, which comprises an installation construction method of the catwalk and an installation construction method of an anti-wind system, wherein the catwalk construction method comprises an integral construction method of the catwalk and a separation construction method of the catwalk; meanwhile, the installation method of the wind-resistant system can well realize that the wind-resistant system and the catwalk of the suspension bridge are matched when the catwalk of the suspension bridge is of an integral structure, can effectively solve the problem of wind-resistant stability of the integral catwalk of the space main cable suspension bridge in a complex wind field environment, and enhances the longitudinal and transverse rigidity of the integral catwalk.
In this embodiment, referring to FIG. 1, in S12, a guide rope 4-1 is pre-installed on the K bank, and thenThe first leading rope 4-2 is erected in advance on the shore, and one end of the leading rope 4-1 is pulled to +.>The shore is connected with the first guide rope 4-2, and then the first guide rope 4-2 is pulled to the K shore by driving the guide rope 4-1 through a winch; a second guide rope is pre-erected on the K bank, the second guide rope is connected with the first guide rope 4-2, and the first guide rope 4-2 is driven by a winch to pull the second guide rope to the +.>A shore; at->And (3) erecting a third guide rope in advance on the shore, connecting the third guide rope with the second guide rope, driving the second guide rope by a winch to pull the third guide rope to the K shore, and completing the pulling. The guide rope 4-1 can be selected from +.>The first, second and third guide ropes 4-2, 4-1 can be selected from steel ropes phi 16, 24 and 36 in sequence, and the guide rope 4-1 can be towed from K shore to +.>The bottom of the shore is connected with a first index 4-2.
In the embodiment, in S13, the brackets are uniformly arranged at intervals of 100 meters, and the bracket positioning ropes are led out from the third guide ropeAnd (3) pulling the support to the K bank, wherein when the support positioning rope is pulled out of 100 meters, one support is connected with the support positioning rope, and the support positioning rope is sequentially pulled to the top of the K bank.
In the embodiment, in S11, the whole assembly of the anchoring beam, the large pull rod and the small pull rod is lifted to the top of the tower by using the tower crane, and is connected with the anchoring block through the steel pin, meanwhile, two ends of the anchoring beam are lifted on the portal of the top of the tower by using the steel rope and the chain block, and the inclination angle of the catwalk is adjusted by using the chain block.
In the embodiment, the catwalk bearing ropes are subjected to sag adjustment in a triangular elevation measurement mode, the mid-span sag of a single bearing rope is measured in sequence, the mid-span sag adjustment is adjusted by tensioning small pull rods at two ends of the catwalk bearing ropes, and the two ends of the catwalk bearing ropes of the same mid-span are symmetrically tensioned at the same time until the corresponding sag positions are adjusted; the side-span catwalk bearing ropes are adjusted through tensioning small pull rods at the top of the tower. After the catwalk bearing rope is erected, the catwalk line is designed in theory, but the actual sagging is inconsistent with the designed sagging due to temperature, processing errors and installation errors, so that the sagging of the catwalk bearing rope needs to be finely adjusted. The sag of each catwalk bearing rope is controlled within 3cm, and the absolute height difference is controlled within 5 cm.
In this embodiment, catwalk face net lays and adopts the method of sliding to lay, the tower crane is with face net handling to the top of the tower platform, the manual work carries the face net to catwalk bearing rope on, later carry out the ligature of antiskid batten and the installation of big or small square steel, the midspan is shifted the steelframe to the top of the tower section with plank and face net laying well earlier, set up the protection railing with this section both sides simultaneously, the side span is with adjusting lever to the top of the tower section with plank and face net laying earlier, also set up the protection railing with this section both sides, set up the counter weight at catwalk face net front end when the midspan face net gliding, utilize the hoist engine of top of the tower control catwalk face layer's the transfer, when catwalk face net can not the free transfer, utilize traction system to pull catwalk face net to transfer. After pavement of the catwalk surface layer is completed, the catwalk railing is fixedly installed through bolts, the catwalk railing is arranged on the catwalk at intervals, the handrail ropes and the railing ropes are installed on the catwalk railing in a traction mode, and then the railing nets are fixed with the catwalk bearing ropes, the railing ropes, the handrail ropes and the catwalk railing through binding belts.
In this embodiment, the installing step of installing the catwalk door frame: (1) On the K bank andassembling catwalk portal frames on the tower top approach bridges on two sides of the bank; (2) Hoisting the catwalk portal frame to the tower top, connecting the catwalk portal frame with the portal rope through a U-shaped bolt, connecting the front end of the catwalk portal with a traction steel rope, and connecting the rear end of the catwalk portal frame with a counter-pulling steel rope of a winch at the tower top; (3) Firstly, a first catwalk door frame is pulled to a midspan position, and the catwalk door frame is connected with a lower cross beam through a steel pin; (4) And installing the rest catwalk door frames to the tower tops of the midspan to the two banks and to each position of the anchorage part.
In this embodiment, the wind-resistant hanging parts at various positions select to cut the fixed steel ropes with corresponding lengths from the steel rope disc by using the cutting pieces according to the initial installation position conditions, and after the wind-resistant hanging parts are installed, the line shape of the wind-resistant ropes is controlled by adjusting the length of the adjusting chain on the wind-resistant hanging parts. The length of the fixed steel rope in each wind-resistant hanging piece is determined by the length of the fixed steel rope through the field blanking, the corresponding length is cut off from the steel rope disc correspondingly to form the wind-resistant hanging piece, and after the wind-resistant hanging piece is installed, the connecting length is adjusted by means of the chain on the wind-resistant hanging piece according to the connection condition to control the line shape of the wind-resistant rope.
In this embodiment, referring to fig. 3, the anchoring devices are installed at both ends of the bridge tower platform, and each steering device is installed on the bridge tower platform between the two anchoring devices and the position of the overhead hoist projected on the bridge tower platform. Wherein the anchoring device 2 comprises an anchor, a first anchor beam, a second anchor beam, a first pull rod and a second pull rod; the anchoring piece is fixed on the tower column bearing platform; one end of the first pull rod is matched with the first anchor beam, and the other end of the first pull rod is arranged on the anchoring piece; one end of the second pull rod is matched with the second anchor beam, and the other end of the second pull rod is used for connecting an anti-wind cable; when the tension of the wind-resistant cable needs to be adjusted after the second pull rod is connected with the wind-resistant cable, an adjusting pull rod is arranged between the first anchor beam and the second anchor beam, two ends of the adjusting pull rod are respectively matched with the first anchor beam and the second anchor beam, a driving piece is arranged on the second anchor beam, and the driving piece can drive the counter-force frame to determine the distance between the first anchor beam and the second anchor beam; and after the tension of the wind resistance cable is adjusted, a plurality of anchoring connecting pieces are arranged between the first anchor beam and the second anchor beam, one end of each anchoring connecting piece is fixed on the first anchor beam, and the other end of each anchoring connecting piece is fixed on the second anchor beam. The steering device comprises an anchoring block and a single-wheel pulley, the anchoring block is connected with the single-wheel pulley, the anchoring block is fixed on a bridge tower bearing platform, and the traction rope 3-1 is matched with the single-wheel pulley. Because a certain distance is reserved between the wind-resistant rope and the anchoring device 2, the installation and connection difficulty is high, and the traction device drives the traction rope 3-1 to pull the wind-resistant rope to approach to the corresponding position of the anchoring device 2, the problem of connection between the wind-resistant rope and the anchoring device 2 is effectively solved, and meanwhile, the tension requirement of effective work of the wind-resistant rope is realized; each steering device is arranged on the bridge tower bearing platform between the two anchoring devices and the position of the tower top winch projected on the bridge tower bearing platform, the guiding direction of the traction rope 3-1 can be effectively adjusted to be finally connected with the wind resistance rope, and meanwhile the problem that the structure of the traction rope 3-1 is damaged due to the fact that the traction rope 3-1 touches a tower column or other parts in the transmission process is avoided, and the durability and the safety are better. Optionally, the steering device comprises a first steering device 3-21, a second steering device 3-22 and a third steering device 3-23, wherein the first steering device 3-21 is close to the anchoring device 2, the third steering device 3-23 and the traction device at the top of the tower are positioned on the same vertical line, the second steering device 3-22 is positioned between the first steering device 3-21 and the third steering device 3-23, and the second steering device 3-22 and the third steering device 3-23 are positioned on the same cross section of the bridge tower platform.
In summary, the invention provides a construction method for a catwalk of a space main cable suspension bridge, which comprises an installation construction method of the catwalk and an installation construction method of an anti-wind system, wherein the catwalk construction method comprises an integral construction method of the catwalk and a separation construction method of the catwalk, compared with the traditional suspension bridge, the distance value of main cables is a non-constant value, and the installation construction method can change the catwalk from integral to separation to adapt to the construction requirements of main cable construction of the suspension bridge and steel box girder section installation; meanwhile, the installation method of the wind-resistant system can well realize that the wind-resistant system and the catwalk of the suspension bridge are matched when the catwalk of the suspension bridge is of an integral structure, can effectively solve the problem of wind-resistant stability of the integral catwalk of the space main cable suspension bridge in a complex wind field environment, and enhances the longitudinal and transverse rigidity of the integral catwalk. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. The construction method applied to the catwalk of the space main cable suspension bridge is characterized by comprising an installation construction method of the catwalk and an installation construction method of an anti-wind system;
the catwalk installation construction method comprises an integral construction method of catwalk and a separation construction method of catwalk, wherein the catwalk is of an integrated structure in the integral construction process, the integral catwalk is separated into two independent catwalk through the separation construction method of catwalk, and the integral construction method of catwalk comprises the following steps:
s11, conveying the anchoring block to the tower top to be connected with the pre-buried climbing cone to finish pre-installation, anchoring the anchoring block on the tower top by using finish rolling screw steel, and connecting the anchoring beam with the large pull rod and the small pull rod after the assembly of the anchoring beam and the large pull rod and the small pull rod is finished;
s12, pre-erecting a pilot rope, and crossing the sea by towing the pilot rope by a shipThe bank is connected with a first index +.>The bank and the K bank are respectively two opposite banks of the suspension bridge, and the second guide rope is driven by the first guide rope to be erected at the +.>Between the bank and K bank, the third guide rope is driven by the second guide rope to be erected at +.>The cable diameters of the guide cable, the first guide cable, the second guide cable and the third guide cable are sequentially increased between the bank and the K bank;
s13, pulling the carrier bearing rope through the third guide ropeThe shore is towed to the K shore and anchored on the top of the K shore; after the bracket bearing rope is erected, a bracket positioning rope is erected, the bracket positioning rope is connected with a third guide rope, the bracket is hung on the bracket bearing rope, connecting points are arranged on the bracket positioning rope at intervals in the length direction, and each bracket is correspondingly connected with each connecting point;
s14, erecting a catwalk bearing rope, wherein the catwalk bearing rope passes through a puller of a third guide rope to be pulled outThe shore is towed to the K shore, the two ends of the catwalk bearing cable are connected with the small pull rod,the catwalk bearing ropes are sequentially erected according to the sequence of bilateral symmetry and bilateral span symmetry, and the erection sequence is adjusted according to the deviation condition of the main towers on the two sides in the erection process; the front end position of the catwalk bearing ropes connected with the small pull rods is provided with a deflection steel frame to adjust the distance between the catwalk bearing ropes;
s15, dragging a portal frame bearing rope;
s16, paving a catwalk surface net on the catwalk bearing rope;
s17, installing a catwalk railing and a catwalk portal, and completing installation of the whole catwalk;
the catwalk is provided with an anti-wind system under the condition of being in an integral type, and the installation construction method of the anti-wind system comprises the following steps:
s21, erecting an anti-wind cable, and utilizing a cable strand traction system to draw the anti-wind cable to the bracket;
s22, connecting a catwalk and an anti-wind cable by using an anti-wind suspender;
s23, utilizing a windlass at the top of the tower to be matched with a steering device to pull the wind resistance cable to the vicinity of the anchoring device;
s24, connecting an anchor head of the anti-wind cable to a second pull rod of the anchoring device through tower crane matching, tensioning the anti-wind cable in the anchoring device through a jack, and installing an anchoring steel belt after tensioning is completed to complete the fixation of the anti-wind cable;
the catwalk separation construction method comprises the steps of firstly installing a space main cable clamp, then installing a pushing system, and pushing the catwalk from the middle to two sides through the pushing system to form a separated catwalk structure.
2. The construction method applied to the catwalk of the space main cable suspension bridge according to claim 1, wherein the construction method comprises the following steps:
in S12, a guide rope is erected in advance on the K bank, anderecting a first guide rope on the shore in advance, and towing one end of the guide rope to +.>The bank is connected with the first guide ropeThen driving the guide rope to pull the first guide rope to the K bank through the winch; pre-erecting a second guide rope on the K bank, connecting the second guide rope with the first guide rope, driving the first guide rope by a winch to pull the second guide rope to the +.>A shore; at->And (3) erecting a third guide rope in advance on the shore, connecting the third guide rope with the second guide rope, driving the second guide rope by a winch to pull the third guide rope to the K shore, and completing the pulling.
3. The construction method applied to the catwalk of the space main cable suspension bridge according to claim 1, wherein the construction method comprises the following steps:
in S13, the brackets are uniformly arranged at intervals of 100 meters, and the bracket positioning ropes are led out from the third guide ropeAnd (3) pulling the support to the K bank, wherein when the support positioning rope is pulled out of 100 meters, one support is connected with the support positioning rope, and the support positioning rope is sequentially pulled to the top of the K bank.
4. The construction method applied to the catwalk of the space main cable suspension bridge according to claim 1, wherein the construction method comprises the following steps:
in S11, the whole assembly of the anchoring beam, the large pull rod and the small pull rod is lifted to the top of the tower by utilizing the tower crane and is connected with the anchoring block through a steel pin, meanwhile, two ends of the anchoring beam are lifted on a portal at the top of the tower by utilizing a steel rope and a chain block, and the anchoring block is adjusted to the inclination angle of the catwalk by utilizing the chain block.
5. The construction method applied to the catwalk of the space main cable suspension bridge according to claim 1, wherein the construction method comprises the following steps:
the catwalk bearing ropes are subjected to sag adjustment in a triangular elevation measurement mode, the mid-span sag of a single bearing rope is measured in sequence, the mid-span sag adjustment is adjusted by tensioning small pull rods at two ends of the catwalk bearing ropes, and the two ends of the catwalk bearing ropes of the same mid-span are symmetrically tensioned at the same time until the corresponding sag positions are adjusted; the side-span catwalk bearing ropes are adjusted through tensioning small pull rods at the top of the tower.
6. The construction method applied to the catwalk of the space main cable suspension bridge according to claim 1, wherein the construction method comprises the following steps:
the catwalk face net is paved by adopting a sliding method, the face net is lifted to a tower top platform by a tower crane, the face net is manually conveyed to a catwalk bearing rope, then the anti-slip battens are bound and square steel is installed, a middle span is used for paving a tower top deflection steel frame to a tower top section by using a wood plate and the face net, meanwhile, two sides of the section are provided with protection rails, an adjusting pull rod is paved to the tower top section by using the wood plate and the face net, two sides of the section are also provided with the protection rails, a counterweight is arranged at the front end of the catwalk face net when the middle span face net slides downwards, the lowering of the catwalk face layer is controlled by using a tower top winch, and when the catwalk face net cannot be freely lowered, the catwalk face net is pulled by using a traction system.
7. The construction method for the catwalk of the space main cable suspension bridge, which is disclosed in claim 6, is characterized in that:
after pavement of the catwalk surface layer is completed, the catwalk railing is fixedly installed through bolts, the catwalk railing is arranged on the catwalk at intervals, the handrail ropes and the railing ropes are installed on the catwalk railing in a traction mode, and then the railing nets are fixed with the catwalk bearing ropes, the railing ropes, the handrail ropes and the catwalk railing through binding belts.
8. The construction method applied to the catwalk of the space main cable suspension bridge according to claim 1, wherein the construction method comprises the following steps:
installing the catwalk door frame: (1) On the K bank andassembling catwalk portal frames on the tower top approach bridges on two sides of the bank; (2) Hoisting catwalk door frame to towerThe top is connected with the portal rope through a U-shaped bolt, the front end of the catwalk portal is connected with a traction steel rope, and the rear end of the catwalk portal is connected with a counter-pulling steel rope of a winch at the top of the catwalk; (3) Firstly, a first catwalk door frame is pulled to a midspan position, and the catwalk door frame is connected with a lower cross beam through a steel pin; (4) And installing the rest catwalk door frames to the tower tops of the midspan to the two banks and to each position of the anchorage part.
9. The construction method applied to the catwalk of the space main cable suspension bridge according to claim 1, wherein the construction method comprises the following steps:
the wind-resistant hanging pieces at all positions select to cut fixed steel ropes with corresponding lengths from the steel rope disc by using cutting pieces according to the initial installation position conditions, and after the wind-resistant hanging pieces are installed, the line shape of the wind-resistant ropes is controlled by adjusting the length of an adjusting chain on the wind-resistant hanging pieces.
10. The construction method applied to the catwalk of the space main cable suspension bridge according to claim 1, wherein the construction method comprises the following steps:
the anchoring devices are arranged at two ends of the bridge tower bearing platform, and each steering device is arranged on the bridge tower bearing platform between the two anchoring devices and the position of the overhead winch projected on the bridge tower bearing platform.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6429505A (en) * | 1987-07-24 | 1989-01-31 | Ishikawajima Harima Heavy Ind | Method of adjusting catwalk at time of erection of suspension bridge cable through method of air spinning construction |
| CN105401527A (en) * | 2015-12-11 | 2016-03-16 | 中交一公局第三工程有限公司 | Construction method for anchoring catwalk and catwalk anchoring device |
| CN205205679U (en) * | 2015-12-11 | 2016-05-04 | 中交一公局第三工程有限公司 | Catwalk anchor |
| CN108487039A (en) * | 2018-02-28 | 2018-09-04 | 济南城建集团有限公司 | Self-anchored suspension bridge and its cat road separate type construction method |
| CN110424269A (en) * | 2019-08-16 | 2019-11-08 | 中铁二院工程集团有限责任公司 | A kind of end bay construction method of three branch mailbox girder cableway platform |
-
2022
- 2022-03-07 CN CN202210216721.0A patent/CN114673088B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6429505A (en) * | 1987-07-24 | 1989-01-31 | Ishikawajima Harima Heavy Ind | Method of adjusting catwalk at time of erection of suspension bridge cable through method of air spinning construction |
| CN105401527A (en) * | 2015-12-11 | 2016-03-16 | 中交一公局第三工程有限公司 | Construction method for anchoring catwalk and catwalk anchoring device |
| CN205205679U (en) * | 2015-12-11 | 2016-05-04 | 中交一公局第三工程有限公司 | Catwalk anchor |
| CN108487039A (en) * | 2018-02-28 | 2018-09-04 | 济南城建集团有限公司 | Self-anchored suspension bridge and its cat road separate type construction method |
| CN110424269A (en) * | 2019-08-16 | 2019-11-08 | 中铁二院工程集团有限责任公司 | A kind of end bay construction method of three branch mailbox girder cableway platform |
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