CN111992991B - Processing and mounting method of rigid suspender of pedestrian suspension bridge - Google Patents
Processing and mounting method of rigid suspender of pedestrian suspension bridge Download PDFInfo
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- CN111992991B CN111992991B CN202010845717.1A CN202010845717A CN111992991B CN 111992991 B CN111992991 B CN 111992991B CN 202010845717 A CN202010845717 A CN 202010845717A CN 111992991 B CN111992991 B CN 111992991B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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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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Abstract
The invention relates to a method for processing and installing a rigid suspender of a pedestrian suspension bridge, belonging to the field of bridge engineering. The two ends of the existing steel wire rope sling or rigid pull rod sling are provided with anchor heads, the upper end of the existing steel wire rope sling or rigid pull rod sling is anchored with a main cable clamp, and the lower end of the existing steel wire rope sling or rigid pull rod sling is anchored on a main beam. If the prior art is applied to a short suspension cable with the length less than 1m, the anchor heads at the two ends of the short suspension cable occupy the length and the cost which are more than 2/3, and the cable body is used in a small amount, so that the manufacturing period and the production cost of the whole bridge are greatly increased. The processing method is used for processing the rigid suspender of the pedestrian suspension bridge, and is characterized in that: the rigid suspender of the pedestrian suspension bridge comprises a flat plate, pin shafts, pin holes and ventilation holes, wherein the pin holes are respectively formed in two ends of the flat plate, each pin shaft is installed in each pin hole, each pin shaft penetrates through the flat plate, and the ventilation holes are formed in the middle of the flat plate.
Description
Technical Field
The invention relates to a method for processing and installing a rigid suspender of a pedestrian suspension bridge, belonging to the field of bridge engineering.
Background
The suspension bridge has large spanning capacity, beautiful line shape and good economical efficiency, and is widely applied to large-span pedestrian bridges in cities and scenic spots. The suspension bridge sling is also called a suspender and is used for transmitting constant loads such as stiffening beams and the like and movable loads of bridge floors to the main cable. The length of each sling of the suspension bridge is different due to the shape of the catenary of the suspension bridge, wherein the sling in the span is the shortest, and the sling is generally called as a short sling. In the middle of the large-span vehicle bridge, the minimum length of the sling is generally designed to be 3-5 m in consideration of the fatigue damage caused by the automobile load to the short sling at the midspan position. For the pedestrian bridge, the minimum length of the sling is not specified, and if the short sling is designed to be too long, the engineering quantity of the cable tower and the sling is greatly increased, and the structure is quite uneconomical. Because the short suspension cable of the pedestrian suspension bridge is usually designed to be 1-3 m. The existing short sling generally adopts the same structure as the long sling, and a short sling structure with good applicability is not provided, so that the short sling is prone to engineering diseases such as fatigue and corrosion.
The two ends of the existing steel wire rope sling or rigid pull rod sling are provided with anchor heads, the upper end of the existing steel wire rope sling or rigid pull rod sling is anchored with a main cable clamp, and the lower end of the existing steel wire rope sling or rigid pull rod sling is anchored on a main beam. If the prior art is applied to a short suspension cable with the length less than 1m, the anchor heads at the two ends of the short suspension cable occupy the length and the cost which are more than 2/3, and the cable body is used in a small amount, so that the manufacturing period and the production cost of the whole bridge are greatly increased. In addition, for the sling with the length less than 1m, because the rigidity difference between the anchor head and the sling body is large, the sling body has large displacement relative to the anchor head under the action of load, the sling body and the anchor head cannot deform and coordinate, the joint position of the sling body and the anchor head is easy to be damaged by bending, fatigue and the like, and the safety and the durability of the structure are seriously influenced.
It should be further noted that the pin structure is only the connecting fastener of the present invention, and does not belong to the scope of the present invention. The pin shaft structure preferably adopts the most commonly used pin shaft structure with lugs on the market, and the patent number CN201420635101.1 utility model is disclosed. The lug plate type pin shaft is characterized in that a lug plate is welded on one end face of the pin shaft, the pin shaft is locked through the lug plate arranged on the section to prevent axial movement, the lug plate and the pin shaft are of an integral structure, and when the lug plate is fixed on a workpiece through a stop bolt, the pin shaft cannot rotate. The pin shaft can also adopt the structural form of patent number CN 206129821U.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a method for processing and installing a rigid suspender of a pedestrian suspension bridge, which has reasonable structural design and solves the problems of long production period, high manufacturing cost, inconsistent deformation of an anchor head and a cable body, poor applicability to a cable with the length of less than 1m and the like of the conventional short sling.
The technical scheme adopted by the invention for solving the problems is as follows: the processing method of the rigid suspender of the pedestrian suspension bridge is used for processing the rigid suspender of the pedestrian suspension bridge, and is characterized in that: the rigid suspender of the pedestrian suspension bridge comprises a flat plate, pin shafts, pin holes and vent holes, wherein the two ends of the flat plate are respectively provided with one pin hole, each pin hole is internally provided with one pin shaft, each pin shaft is penetrated through the flat plate, and the vent holes are formed in the middle of the flat plate;
the processing method comprises the following steps:
firstly, a flat plate is formed by machining a whole steel plate, and is cut and perforated by adopting a numerical control plasma cutting technology;
secondly, the plate is required to be checked for the grade, thickness and surface quality of the steel plate before blanking, and blanking can be performed after the steel plate is qualified;
thirdly, carrying out comprehensive inspection on the numerical control machine tool before operation;
fourthly, when the edge and the opening of the steel plate are cut, firstly hoisting the steel plate to a cutting platform and fixing the steel plate in place, and removing dirt and grease on the surface of the steel plate;
fifthly, an upper pin hole, a lower pin hole and a vent hole are formed in the flat plate, the pin holes belong to small pieces relative to the vent hole, the pin holes are cut firstly, the upper pin hole and the lower pin hole are cut simultaneously, and the deformation of the component in the cutting process can be reduced by the symmetrical cutting process of the small piece first and then the large piece;
sixthly, cutting the vent hole, wherein the vent hole is a strip-shaped member, the vent hole is cut from the semicircular short edges of the upper edge and the lower edge, and then the left long edge and the right long edge are cut, and the cutting process can adjust the posture and the speed of a cutting nozzle in real time in the cutting process and improve the cutting precision;
seventhly, cutting the upper semicircular edge, the lower semicircular edge, the left edge and the right edge of the flat plate, wherein the cutting torch moves at a constant speed in cutting;
eighthly, after the cutting is finished, checking a cutting surface of the steel plate, enabling the cutting surface to have no cracks, slag inclusion and unfilled edges larger than 1mm, edging the edge of each interface of the steel plate by using a steel plate milling and grinding machine, grinding the edge to be smooth and smooth, and avoiding the occurrence of an obtuse angle.
Furthermore, the two ends of the flat plate are respectively provided with a cable clamp ear plate and a lifting lug on the beam, the cable clamp ear plate is connected with one pin shaft, and the lifting lug on the beam is connected with the other pin shaft.
And further, in the third step, whether the empty vehicle runs normally is checked according to a program, the steel plate is moved to the side in an 'empty vehicle' mode after the empty vehicle runs normally, the plasma cutting moment is checked and installed, zinc powder and a gas pipeline switch are scribed, a component installation position line is scribed according to design data, and a line and a check line are aligned.
Further, in the seventh step, the cutting nozzle and the steel plate are always kept in a vertical state during cutting.
Further, the ventilation hole is arranged in a waist-shaped structure.
Further, the central points of the two pin holes are both located on the axis of the flat plate.
Furthermore, the two ends of the flat plate are respectively provided with a cable clamp ear plate and a lifting lug on the beam, the cable clamp ear plate is connected with one pin shaft, and the lifting lug on the beam is connected with the other pin shaft.
Preferably, the pin shaft is made of 40Cr quenched and tempered alloy structural steel, and has high tensile strength, shearing strength and local extrusion strength after quenching and tempering. The stress condition of the pin shaft under the action of various stresses such as pulling, pressing, shearing, twisting and the like is complex, and 40Cr steel with better strength, toughness and wear resistance is adopted.
Further, the flat plate is vertically arranged, and the center of the cable clamp lug plate and the center of the lifting lug on the beam are both located on the axis of the flat plate.
Further, the flat plate is formed by integrally cutting a stainless steel plate or integrally casting hardened and tempered cast steel.
Furthermore, the width direction of the flat plate is the longitudinal direction of the bridge, and the length direction of the flat plate is the vertical direction of the bridge.
Furthermore, the cable clamp lug plate and the lifting lug on the beam are respectively connected with two ends of the flat plate through pin shaft anchoring.
Further, dull and stereotyped quantity is two, two dull and stereotyped parallel arrangement, lug all is the setting of monaural plate type structure on cable clamp otic placode and the roof beam, and lug is located between the both ends of two dull and stereotyped parallel arrangement respectively on the cable clamp otic placode that is the setting of monaural plate type structure and the roof beam.
Preferably, the mounting gap between the flat plate and the cable clamp lug plate and the lug on the beam is kept within 2 mm.
Further, the quantity of dull and stereotyped is one, lug all is the setting of ears plate-type structure on rope clamp otic placode and the roof beam, dull and stereotyped both ends are located respectively and are between the lug on the rope clamp otic placode and the roof beam that the ears plate-type structure set up.
Preferably, the flat plate is made of a plate with the thickness of 20-30 mm, and the contact surface of the hanger rod and the pin shaft is easy to partially bend due to the fact that the plate is too thin; the plate is too thick, the processing difficulty is larger, and the strength reduction is obvious.
Preferably, the width of the flat plate is preferably 60-80 mm, the plate is too wide, the transverse windward area is large, and the wind load effect is large; and the wide plate has poor flatness, is easy to generate in-plane bending, and has adverse effects on structural installation and stress.
Further, another technical object of the present invention is to provide a method for installing a rigid suspension rod of a pedestrian suspension bridge.
The technical purpose of the invention is realized by the following technical scheme.
A mounting method of rigid suspender of pedestrian suspension bridge is used for mounting the rigid suspender of pedestrian suspension bridge, and is characterized in that: the rigid suspender of the pedestrian suspension bridge comprises a flat plate, pin shafts, pin holes and vent holes, wherein the two ends of the flat plate are respectively provided with one pin hole, each pin hole is internally provided with one pin shaft, each pin shaft is penetrated through the flat plate, and the vent holes are formed in the middle of the flat plate;
the installation method comprises the following steps: the pin hole on the first flat plate is aligned with the pin hole on the other side of the cable clamp ear plate in parallel, the pin shaft is inserted, then the pin hole on the second flat plate is inserted into the pin shaft on the other side of the cable clamp ear plate, the position of the flat plate is adjusted, the flat plate is ensured to be parallel to the cable clamp ear plate and is perpendicular to the pin shaft, and the connection between the suspender and the main beam cable clamp is completed.
Further, the following preparation work is carried out before the rigid suspender of the pedestrian suspension bridge is installed:
firstly, erecting a main cable to a designed hollow cable shape position, marking a cable clamp position on the main cable, installing a cable clamp at a corresponding position, wherein the cable clamp adopts an upper and lower involutory lug plate type cable clamp, constructing an upper half cable clamp, constructing a lower half cable clamp, connecting and fixing the upper and lower cable clamps by adopting a screw rod, arranging a cable clamp lug plate on the lower half cable clamp, and ensuring that the cable clamp lug plate is parallel to a vertical plane when installing the lower half cable clamp;
secondly, the lug plate on the beam is of an ear plate type structure, the lug plate is welded and fixed at a designed position on the stiffening beam, stiffening plates are arranged on two side surfaces of the lug plate and are perpendicular to the lug plate and are respectively welded with the lug plate and the stiffening beam, and the stiffening plates are arranged so that the lug plate of the lug plate on the beam does not deform left and right in the construction and later operation processes, and the lateral rigidity of the lug is improved;
and thirdly, after the construction of the cable clamp on the main cable and the lifting lug on the beam is completed, the lifting lug is installed, before the lifting lug is installed, whether the installation positions of the cable clamp on the main cable and the lifting lug on the beam are accurate is retested, whether the distance from the central point of a pin hole of the cable clamp to the central point of a pin hole of the lifting lug is equal to the length between an upper pin hole and a lower pin hole of the rod is determined, and after the recheck is correct, the lifting lug can be installed.
And furthermore, the lug plate is parallel to the cable clamp lug plate and the lifting lug on the beam during installation and is vertical to the pin shaft.
Further, the ventilation hole is arranged in a waist-shaped structure.
Further, the central points of the two pin holes are both located on the axis of the flat plate.
Furthermore, the two ends of the flat plate are respectively provided with a cable clamp ear plate and a lifting lug on the beam, the cable clamp ear plate is connected with one pin shaft, and the lifting lug on the beam is connected with the other pin shaft.
Preferably, the pin shaft is made of 40Cr quenched and tempered alloy structural steel, and has high tensile strength, shearing strength and local extrusion strength after quenching and tempering. The stress condition of the pin shaft under the action of various stresses such as pulling, pressing, shearing, twisting and the like is complex, and 40Cr steel with better strength, toughness and wear resistance is adopted.
Further, the flat plate is vertically arranged, and the center of the cable clamp lug plate and the center of the lifting lug on the beam are both located on the axis of the flat plate.
Further, the flat plate is formed by integrally cutting a stainless steel plate or integrally casting hardened and tempered cast steel.
Furthermore, the width direction of the flat plate is the longitudinal direction of the bridge, and the length direction of the flat plate is the vertical direction of the bridge.
Furthermore, the cable clamp lug plate and the lifting lug on the beam are respectively connected with two ends of the flat plate through pin shaft anchoring.
Further, dull and stereotyped quantity is two, two dull and stereotyped parallel arrangement, lug all is the setting of monaural plate type structure on cable clamp otic placode and the roof beam, and lug is located between the both ends of two dull and stereotyped parallel arrangement respectively on the cable clamp otic placode that is the setting of monaural plate type structure and the roof beam.
Preferably, the mounting gap between the flat plate and the cable clamp lug plate and the lug on the beam is kept within 2 mm.
Further, the quantity of dull and stereotyped is one, lug all is the setting of ears plate-type structure on rope clamp otic placode and the roof beam, dull and stereotyped both ends are located respectively and are between the lug on the rope clamp otic placode and the roof beam that the ears plate-type structure set up.
Preferably, the flat plate is made of a plate with the thickness of 20-30 mm, and the contact surface of the hanger rod and the pin shaft is easy to partially bend due to the fact that the plate is too thin; the plate is too thick, the processing difficulty is larger, and the strength reduction is obvious.
Preferably, the width of the flat plate is preferably 60-80 mm, the plate is too wide, the transverse windward area is large, and the wind load effect is large; and the wide plate has poor flatness, is easy to generate in-plane bending, and has adverse effects on structural installation and stress.
Compared with the prior art, the invention has the following advantages:
1. the rigid suspender of the pedestrian suspension bridge is connected with the cable clamp and the beam body through the pin holes, so that the preparation process and the production cost of the sling are greatly simplified;
2. the plate-type structure manufactured by integrally cutting the flat plate obviously improves the integral rigidity and durability of the sling;
3. the aerodynamic characteristic of the sling is effectively improved through the streamline hollow design, wind-induced vibration is reduced, and permeability and attractiveness are improved;
4. the rigid suspender of the pedestrian suspension bridge has the advantages of simple structure, lower production cost and good stress effect, and has great popularization and application values in the field of pedestrian suspension bridges.
Drawings
Fig. 1 is a schematic front view of an embodiment of the present invention.
Fig. 2 is a left side view structural diagram of the embodiment of the invention.
Fig. 3 is a schematic top view of an embodiment of the present invention.
Fig. 4 is a schematic view of the cross-sectional structure a-a in fig. 1.
Fig. 5 is a schematic view of an installation elevation structure of the embodiment of the present invention.
Fig. 6 is a schematic view of a mounting side structure of an embodiment of the present invention.
In the figure: the device comprises a flat plate 1, a pin shaft 2, a pin hole 3, a vent hole 4, a cable clamp lug plate 5 and a beam upper lifting lug 6.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1 to 6, it should be understood that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the function and the achievable purpose of the present invention. In the present specification, the terms "upper", "lower", "left", "right", "middle" and "one" are used for clarity of description, and are not used to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.
Example 1.
The rigid suspender of the pedestrian suspension bridge in the embodiment comprises a flat plate 1, pin shafts 2, pin holes 3 and vent holes 4, wherein the pin holes 3 are respectively arranged at two ends of the flat plate 1, the pin shafts 2 are respectively arranged in each pin hole 3, the pin shafts 2 run through the flat plate 1, the vent holes 4 are arranged in the middle of the flat plate 1, and the vent holes 4 are arranged in a waist-shaped structure.
The central points of the two pin holes 3 in the embodiment are both located on the axis of the flat plate 1, the two ends of the flat plate 1 are respectively provided with a cable clamp lug plate 5 and a beam upper lifting lug 6, the cable clamp lug plate 5 is connected with one pin shaft 2, and the beam upper lifting lug 6 is connected with the other pin shaft 2.
In this embodiment, the flat plate 1 is vertically arranged, the center of the cable clamp lug plate 5 and the center of the lifting lug 6 on the beam are both located on the axis of the flat plate 1, the flat plate 1 is integrally formed by cutting a stainless steel plate or integrally cast by hardened and tempered cast steel, the width direction of the flat plate 1 is the longitudinal direction of the bridge, the length direction of the flat plate 1 is the vertical direction of the bridge, and the cable clamp lug plate 5 and the lifting lug 6 on the beam are respectively connected with two ends of the flat plate 1 through the anchoring of the pin shaft 2.
The quantity of dull and stereotyped 1 in this embodiment is two, two dull and stereotyped 1 parallel arrangement, and lug 6 all is the setting of monaural plate type structure on cable clamp otic placode 5 and the roof beam, and lug 6 is located between two dull and stereotyped 1's of parallel arrangement both ends on cable clamp otic placode 5 and the roof beam that are the setting of monaural plate type structure respectively.
Specifically speaking, the rigid suspender of the pedestrian suspension bridge is composed of two identical flat plates 1 which are arranged in parallel, a connecting piece for fixing can be arranged between the two flat plates 1 or not, an upper end pin shaft 2 located on the flat plate 1 is used for connecting a cable clip lug plate 5 and a sling flat plate, a lower end pin shaft 2 located on the flat plate 1 is used for connecting the sling lug plate and a lifting lug 6 on a beam, the flat plate 1 is rectangular, the upper edge and the lower edge of the flat plate are semicircular, and the circular diameter is the width of the flat plate 1.
The flat plate 1 is of a symmetrical structure about an axis, a hollow area, namely a vent hole 4, is arranged in the middle of the flat plate 1, and the hollow area is designed to reduce the weight of the structure and simplify materials; and secondly, the lateral wind area of the flat plate 1 is reduced, and the effect of cross wind on the flat plate 1 is reduced.
In order to improve the efficiency of cross wind passing through the structure and reduce wind-induced vibration, the appearance of the hollowed-out area is designed into a streamline shape, the streamline shape can improve the aerodynamic performance of the structure and can also obviously improve the permeability and the attractiveness of the structure, the appearance of the hollowed-out area is similar to that of the flat plate 1, the upper edge and the lower edge of the hollowed-out area are semicircular, and the circular radius of the hollowed-out area is the same as the hollowed-out width and the radius of the pin hole 3.
The upper and lower both ends of flat board 1 respectively are equipped with a pinhole 3 for round pin axle 2 passes and with on the rope clip otic placode 5 and the roof beam lug 6 connection moulding, on, the semi-circular centre of a circle of lower limb and the 3 centre of a circle of pinhole all pass through flat board 1's axis, the diameter ratio of pinhole 3 is slightly bigger than the diameter of round pin axle 2, make round pin axle 2 can install to take one's place conveniently, flat board 1 adopts a monoblock panel to cut the trompil, improve the wholeness and the aesthetic property of structure, flat board 1's material adopts stainless steel or high performance cast steel, improve the fatigue resistance and the corrosion resistance of jib, adopt general panel, should do measures such as zinc-plating or other corrosion protection, in order to guarantee jib structure's durability.
The rigid suspender of the pedestrian suspension bridge is suitable for a short suspender of which the mid-span length of the suspension bridge is not more than 2m, the suspender is of a rigid structure, the capability of stretching and deforming along the axial direction is obviously reduced compared with that of a flexible suspender, and a long suspender outside the mid-span position deforms greatly under the action of live load, so that the rigid suspender cannot adapt to the deformation of the flexible suspender, and a large secondary internal force can be generated in the structure, and the main cable, the main beam and the suspender are damaged in strength; therefore, the rigid suspender of the pedestrian suspension bridge is not suitable for a long suspender outside the midspan area of the suspension bridge.
Example 2.
The rigid suspender of the pedestrian suspension bridge in the embodiment comprises a flat plate 1, pin shafts 2, pin holes 3 and vent holes 4, wherein the pin holes 3 are respectively arranged at two ends of the flat plate 1, the pin shafts 2 are respectively arranged in each pin hole 3, the pin shafts 2 run through the flat plate 1, the vent holes 4 are arranged in the middle of the flat plate 1, and the vent holes 4 are arranged in a waist-shaped structure.
The central points of the two pin holes 3 are all positioned on the axis of the flat plate 1, the two ends of the flat plate 1 are respectively provided with a cable clamp lug plate 5 and a lifting lug 6 on the beam, the cable clamp lug plate 5 is connected with one pin shaft 2, and the lifting lug 6 on the beam is connected with the other pin shaft 2.
In this embodiment, the flat plate 1 is vertically arranged, the center of the cable clamp lug plate 5 and the center of the lifting lug 6 on the beam are both located on the axis of the flat plate 1, the flat plate 1 is integrally formed by cutting a stainless steel plate or integrally cast by hardened and tempered cast steel, the width direction of the flat plate 1 is the longitudinal direction of the bridge, the length direction of the flat plate 1 is the vertical direction of the bridge, and the cable clamp lug plate 5 and the lifting lug 6 on the beam are respectively connected with two ends of the flat plate 1 through the anchoring of the pin shaft 2.
The quantity of dull and stereotyped 1 in this embodiment is one, and lug 6 all is the setting of ears plate-type structure on rope clip otic placode 5 and the roof beam, and the both ends of dull and stereotyped 1 are located respectively between lug 6 on the rope clip otic placode 5 and the roof beam that are the setting of ears plate-type structure.
Specifically, the rigid suspender of the pedestrian suspension bridge comprises a flat plate 1, an upper end pin shaft 2 located on the flat plate 1 is used for connecting a rope clamping lug plate 5 and a sling flat plate, a lower end pin shaft 2 located on the flat plate 1 is used for connecting a sling lug plate and an upper beam lifting lug 6, the flat plate 1 is rectangular, the upper edge and the lower edge of the flat plate are semicircular, and the circular diameter is the width of the flat plate 1.
The flat plate 1 is of a symmetrical structure about an axis, a hollow area, namely a vent hole 4, is arranged in the middle of the flat plate 1, and the hollow area is designed to reduce the weight of the structure and simplify materials; and secondly, the lateral wind area of the flat plate 1 is reduced, and the effect of cross wind on the flat plate 1 is reduced.
In order to improve the efficiency of cross wind passing through the structure and reduce wind-induced vibration, the appearance of the hollowed-out area is designed into a streamline shape, the streamline shape can improve the aerodynamic performance of the structure and can also obviously improve the permeability and the attractiveness of the structure, the appearance of the hollowed-out area is similar to that of the flat plate 1, the upper edge and the lower edge of the hollowed-out area are semicircular, and the circular radius of the hollowed-out area is the same as the hollowed-out width and the radius of the pin hole 3.
The upper and lower both ends of flat board 1 respectively are equipped with a pinhole 3 for round pin axle 2 passes and with on the rope clip otic placode 5 and the roof beam lug 6 connection moulding, on, the semi-circular centre of a circle of lower limb and the 3 centre of a circle of pinhole all pass through flat board 1's axis, the diameter ratio of pinhole 3 is slightly bigger than the diameter of round pin axle 2, make round pin axle 2 can install to take one's place conveniently, flat board 1 adopts a monoblock panel to cut the trompil, improve the wholeness and the aesthetic property of structure, flat board 1's material adopts stainless steel or high performance cast steel, improve the fatigue resistance and the corrosion resistance of jib, adopt general panel, should do measures such as zinc-plating or other corrosion protection, in order to guarantee jib structure's durability.
Inserting the upper end of a flat plate 1 into the middle of a cable clamp ear plate 5, and penetrating a pin shaft 2 through a pin hole 3 at the upper end of the flat plate 1 and a pin hole 3 on the cable clamp ear plate 5 to form anchoring connection of a suspender and a cable clamp; the lower end of a flat plate 1 is inserted into the middle of a double-lug plate of a lifting lug 6 on a beam, and a pin shaft 2 penetrates through a pin hole 3 arranged at the lower end of the flat plate 1 and the pin hole 3 of the lifting lug 6 on the beam to form anchoring connection of a suspender and the beam.
The remaining method of implementation is exactly the same as in example 1 above.
The rigid suspension rod adopting one flat plate 1 is usually required to be thicker than the flat plate 1, and the suspension rod and the lifting lugs on the beam are both required to be of a double-lug plate type, so that the manufacturing process is more complicated than that of the embodiment 1, and the requirements on the precision of processing and installation are higher. Therefore, embodiment 1 is only recommended.
The rigid suspender of the pedestrian suspension bridge is suitable for a short suspender of which the mid-span length of the suspension bridge is not more than 2m, the suspender is of a rigid structure, the capability of stretching and deforming along the axial direction is obviously reduced compared with that of a flexible suspender, and a long suspender outside the mid-span position deforms greatly under the action of live load, so that the rigid suspender cannot adapt to the deformation of the flexible suspender, and a large secondary internal force can be generated in the structure, and the main cable, the main beam and the suspender are damaged in strength; therefore, the rigid suspender of the pedestrian suspension bridge is not suitable for a long suspender outside the midspan area of the suspension bridge.
Example 3.
The processing method of the rigid suspender of the pedestrian suspension bridge in the embodiment is used for processing the rigid suspender of the pedestrian suspension bridge in the embodiments 1 and 2, and the processing method comprises the following steps:
firstly, the flat plate 1 is formed by machining a whole steel plate, and a numerical control plasma cutting technology is adopted for cutting and perforating.
And secondly, the plate 1 is required to check the grade, thickness and surface quality of the steel plate before blanking, and blanking can be performed after the steel plate is qualified.
Thirdly, carrying out comprehensive inspection on the numerical control machine tool before operation; checking whether the empty vehicle runs normally according to a program, carrying out steel plate 'empty vehicle' edge walking after the empty vehicle runs normally, checking and installing plasma cutting moment, marking a zinc powder and gas pipeline switch, marking a component installation position line according to design data, and aligning the line and a check line.
And fourthly, when the edge and the opening of the steel plate are cut, firstly, the steel plate is hung on a cutting platform and fixed in place, and dirt and grease on the surface of the steel plate are removed.
Fifthly, an upper pin hole 3, a lower pin hole 3 and a vent hole 4 are formed in the flat plate 1, the pin holes 3 belong to small pieces relative to the vent holes 4, the pin holes 3 are firstly cut, the upper pin hole 3 and the lower pin hole 3 are simultaneously cut, and the deformation of the component in the cutting process can be reduced through the small piece-to-large piece cutting process and the symmetrical cutting process.
Sixthly, cutting the vent hole 4, wherein the vent hole 4 is a strip-shaped member, the vent hole is cut from the semicircular short edges of the upper edge and the lower edge, and then the left long edge and the right long edge are cut.
Seventhly, cutting the upper semicircular edge, the lower semicircular edge, the left edge and the right edge of the flat plate 1, wherein the cutting torch moves at a constant speed in cutting; the cutting nozzle and the steel plate are always kept in a vertical state during cutting.
Eighthly, after the cutting is finished, checking a cutting surface of the steel plate, enabling the cutting surface to have no cracks, slag inclusion and unfilled edges larger than 1mm, edging the edge of each interface of the steel plate by using a steel plate milling and grinding machine, grinding the edge to be smooth and smooth, and avoiding the occurrence of an obtuse angle.
The numerical control plasma arc cutting is a processing method in which a numerical control machine tool partially melts (and evaporates) a metal portion at a cut of a workpiece by using heat of a high-temperature plasma arc, and removes the molten metal by momentum of high-speed plasma to form the cut. Compared with numerical control flame cutting, the plasma cutting machining process is high in cutting speed and high in efficiency; the precision of fine plasma cutting is high, and the thermal deformation during cutting is small; the cutting field is wide, and the cutting tool can cut nonferrous metals such as copper, aluminum and the like and stainless steel; the plasma technology can eliminate the noise produced during cutting, reduces the pollution of dust, harmful gas and arc light, compares in flame cutting environmental protection more.
Example 4.
The method for installing the rigid suspender of the pedestrian suspension bridge in the embodiment is used for installing the rigid suspender of the pedestrian suspension bridge in the embodiments 1 and 2, and the installation method comprises the following steps:
firstly, erecting a main cable to a designed hollow cable shape position, marking a cable clamp position on the main cable, installing a cable clamp at a corresponding position, wherein the cable clamp adopts an upper and lower involutory lug plate type cable clamp, constructing an upper half cable clamp, constructing a lower half cable clamp, connecting and fixing the upper and lower cable clamps by adopting a screw rod, arranging a cable clamp lug plate 5 on the lower half cable clamp, and ensuring that the cable clamp lug plate 5 is parallel to a vertical plane when installing the lower half cable clamp;
secondly, the lug plate 6 on the beam is of an ear plate type structure, the lug plate is welded and fixed at a designed position on the stiffening beam, stiffening plates are arranged on two side surfaces of the lug plate and are perpendicular to the lug plate and are respectively welded with the lug plate and the stiffening beam, and the stiffening plates are arranged so that the lug plate of the lug plate on the beam does not deform left and right in the construction and later operation processes, and the lateral rigidity of the lug is improved;
and thirdly, after the construction of the cable clamp on the main cable and the lifting lug on the beam is finished, the lifting rod is installed, before the lifting rod is installed, whether the installation positions of the lifting lug 6 on the main cable clamp and the beam are accurate is retested, whether the distance from the central point of a cable clamp pin hole to the central point of a lifting lug pin hole is equal to the length between the upper pin hole and the lower pin hole 3 of the rod is determined, and after rechecking is correct, the lifting rod can be installed.
Aligning a pin hole 3 on a first flat plate 1 and a pin hole 3 of a cable clamp ear plate 5 in parallel, inserting an upper pin shaft 2, then penetrating the pin hole 3 of a second flat plate 1 into the pin shaft 2 on the other side of the cable clamp ear plate 5, adjusting the position of the flat plate 1, ensuring that the flat plate 1 is parallel to the cable clamp ear plate 5 and is vertical to the pin shaft 2, and completing the connection between a suspender and a main beam cable clamp; when the lug plate is installed, the lug plate is parallel to the cable clamp lug plate 5 and the lifting lug 6 on the beam and is vertical to the pin shaft 2.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (7)
1. A processing method of rigid suspender of pedestrian suspension bridge is used for processing rigid suspender of pedestrian suspension bridge, and is characterized in that: the rigid suspender of the pedestrian suspension bridge comprises a flat plate (1), pin shafts (2), pin holes (3) and vent holes (4), wherein the two ends of the flat plate (1) are respectively provided with one pin hole (3), each pin hole (3) is internally provided with one pin shaft (2), the pin shafts (2) are penetrated through the flat plate (1), the vent holes (4) are arranged in the middle of the flat plate (1),
the cable clamp lug plate (5) and the beam upper lifting lug (6) are respectively arranged at two ends of the flat plate (1), the cable clamp lug plate (5) is connected with one pin shaft (2), the beam upper lifting lug (6) is connected with the other pin shaft (2), and the cable clamp lug plate (5) and the beam upper lifting lug (6) are respectively connected with two ends of the flat plate (1) in an anchoring manner through the pin shafts (2);
the processing method comprises the following steps:
firstly, a flat plate (1) is formed by machining a whole steel plate, and is cut and perforated by adopting a numerical control plasma cutting technology;
secondly, the plate (1) is used for checking the grade, the thickness and the surface quality of the steel plate before blanking, and blanking can be performed after the steel plate is qualified;
thirdly, carrying out comprehensive inspection on the numerical control machine tool before operation;
fourthly, when the edge and the opening of the steel plate are cut, firstly hoisting the steel plate to a cutting platform and fixing the steel plate in place, and removing dirt and grease on the surface of the steel plate;
fifthly, an upper pin hole (3), a lower pin hole (3) and a vent hole (4) are formed in the flat plate (1), the pin holes (3) belong to small parts relative to the vent hole (4), the pin holes (3) are cut firstly, the upper pin hole (3) and the lower pin hole (3) are cut simultaneously, and the deformation of the component in the cutting process can be reduced by the symmetrical cutting process of the small parts and then the large parts;
sixthly, cutting the vent hole (4), wherein the vent hole (4) is a strip-shaped member, the vent hole is cut from the semicircular short edges of the upper edge and the lower edge, then the left long edge and the right long edge are cut, and the cutting process adjusts the posture and the speed of a cutting nozzle in real time in the cutting process and improves the cutting precision;
seventhly, cutting the upper semicircular edge, the lower semicircular edge, the left edge and the right edge of the flat plate (1) at last, wherein the cutting torch moves at a constant speed in the cutting process;
eighthly, after the cutting is finished, checking a cutting surface of the steel plate, enabling the cutting surface to be free of cracks, slag and unfilled edges larger than 1mm, edging the edge of each interface of the steel plate by using a steel plate milling and grinding machine, polishing the edge to be smooth and smooth, and avoiding the occurrence of an obtuse angle.
2. The method for processing the rigid suspension rod of the pedestrian suspension bridge according to claim 1, wherein: and in the third step, whether the empty vehicle runs normally is checked according to a program, the steel plate is moved to the side of the empty vehicle after the empty vehicle runs normally, a plasma cutting moment is checked and installed, zinc powder and a gas pipeline switch are scribed, a component installation position line is scribed according to design data, and a line and a check line are aligned.
3. The method for processing the rigid suspension rod of the pedestrian suspension bridge according to claim 1, wherein: and seventhly, the cutting nozzle and the steel plate are always kept in a vertical state during cutting.
4. The method for processing the rigid suspension rod of the pedestrian suspension bridge according to claim 1, wherein: the quantity of dull and stereotyped (1) is two, two dull and stereotyped (1) parallel arrangement, lug (6) all are the setting of monaural plate type structure on cable clamp otic placode (5) and the roof beam, and lug (6) are located between the both ends of two parallel arrangement's dull and stereotyped (1) respectively on cable clamp otic placode (5) and the roof beam that are the setting of monaural plate type structure.
5. The method for processing the rigid suspension rod of the pedestrian suspension bridge according to claim 1, wherein: the quantity of dull and stereotyped (1) is one, lug (6) all are the setting of ears plate-type structure on cable clamp otic placode (5) and the roof beam, the both ends of dull and stereotyped (1) are located respectively and are between lug (6) on the cable clamp otic placode (5) and the roof beam that the ears plate-type structure set up.
6. A mounting method of a rigid suspender of a pedestrian suspension bridge, which is used for mounting the rigid suspender of the pedestrian suspension bridge, and is characterized in that: the rigid suspender of the pedestrian suspension bridge comprises a flat plate (1), pin shafts (2), pin holes (3) and vent holes (4), wherein the two ends of the flat plate (1) are respectively provided with one pin hole (3), each pin hole (3) is internally provided with one pin shaft (2), the pin shafts (2) are penetrated through the flat plate (1), and the vent holes (4) are arranged in the middle of the flat plate (1);
before the rigid suspender of the pedestrian suspension bridge is installed, the following preparation works are carried out:
firstly, erecting a main cable to a designed hollow cable shape position, marking a cable clamp position on the main cable, installing a cable clamp at a corresponding position, wherein the cable clamp adopts an upper and lower involutory lug plate type cable clamp, constructing an upper half cable clamp firstly, constructing a lower half cable clamp, connecting and fixing the upper and lower cable clamps by adopting a screw rod, arranging a cable clamp lug plate (5) on the lower half cable clamp, and ensuring that the cable clamp lug plate (5) is parallel to a vertical plane when the lower half cable clamp is installed;
secondly, the lug plate on the beam (6) is of a lug plate type structure, the lug plate is welded and fixed at a designed position on the stiffening beam, stiffening plates are arranged on two side surfaces of the lug plate, the stiffening plates are perpendicular to the lug plate and are respectively welded with the lug plate and the stiffening beam, and the stiffening plates are arranged so that the lug plate of the lug on the beam does not deform left and right in the construction and later operation processes, and the lateral rigidity of the lug is improved;
thirdly, after the construction of the cable clamp on the main cable and the lifting lug on the beam is finished, the lifting rod is installed, before the lifting rod is installed, whether the installation positions of the cable clamp on the main cable and the lifting lug (6) on the beam are accurate or not is re-measured, whether the distance from the central point of a cable clamp pin hole to the central point of a lifting lug pin hole is equal to the length between an upper pin hole and a lower pin hole (3) of the rod or not is re-measured, and after the re-check is correct, the lifting rod can be installed;
the installation method comprises the following steps: the pin hole (3) on the first flat plate (1) aligns with the pin hole (3) of the cable clamp ear plate (5) in parallel, the pin shaft (2) is inserted, then the pin hole (3) of the second flat plate (1) penetrates into the pin shaft (2) on the other side of the cable clamp ear plate (5), the position of the flat plate (1) is adjusted, the flat plate (1) is ensured to be parallel to the cable clamp ear plate (5) and is vertical to the pin shaft (2), and the connection between the suspender and the main beam cable clamp is completed.
7. The method of installing a rigid suspension bridge boom of claim 6, wherein: when the lug plate is installed, the lug plate is parallel to the cable clamp lug plate (5) and the lifting lug (6) on the beam and is vertical to the pin shaft (2).
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| CN113026530A (en) * | 2020-12-31 | 2021-06-25 | 武汉鑫拓力工程技术有限公司 | Connecting structure of suspender and bridge |
| CN113235461B (en) * | 2021-04-15 | 2022-10-28 | 江苏法尔胜缆索有限公司 | Method for repairing suspension bridge cable clamp ear hole and box girder ear hole |
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| JP2018115444A (en) * | 2017-01-17 | 2018-07-26 | 株式会社エム・テック | Bridge pier removal method |
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| SU1011765A1 (en) * | 1981-12-22 | 1983-04-15 | Ярославский политехнический институт | Joint between hanger and load-carrying cable of suspension bridge |
| CN101298754B (en) * | 2008-05-16 | 2012-06-20 | 上海市政工程设计研究总院 | Pin abut type lifting rope |
| CN201424626Y (en) * | 2009-05-23 | 2010-03-17 | 巨力索具股份有限公司 | Stainless steel hanger rod |
| US9784001B1 (en) * | 2011-05-03 | 2017-10-10 | Paul Kristen, Inc | Adjustable scaffolding suspension assembly |
| CN102873504A (en) * | 2011-07-12 | 2013-01-16 | 朱晓东 | Machining method for suspender of stabilizer bar for coach accessory |
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| CN110820518B (en) * | 2019-11-16 | 2021-03-02 | 中交路桥建设有限公司 | Machining and hoisting method for steel arch bridge suspender |
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| CN1576116A (en) * | 2003-07-22 | 2005-02-09 | 姜镇熙 | Pillar anchor and method for manufacturing the same |
| JP2018115444A (en) * | 2017-01-17 | 2018-07-26 | 株式会社エム・テック | Bridge pier removal method |
| CN206859057U (en) * | 2017-02-09 | 2018-01-09 | 江苏法尔胜缆索有限公司 | New spatial cable suspension rope bridge crane Cable Structure |
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