Suspension bridge catwalk surface net under slide trolley, construction method and application

Abstract

The present application belongs to the catwalk construction technology field of suspension bridge, and particularly relates to a catwalk face net down sliding trolley of suspension bridge, a construction method and application. The catwalk face net down sliding trolley of suspension bridge comprises a trolley main frame, a bottom basket, a walking mechanism and a traction steel wire rope. The trolley main frame is rectangular, and a through hole is formed in the center position. The bottom basket is fixedly connected to the lower surface of the trolley main frame and faces the through hole. The walking mechanism is fixedly connected to the lower surface of the trolley main frame and is symmetric about the bottom basket. The two ends of the traction steel wire rope are connected to the trolley main frame. The present application is applied to the upper structure construction of large-span suspension bridge. During construction, the catwalk face net down sliding trolley of suspension bridge is connected to the catwalk load bearing cable between the tower anchors of the suspension bridge, and is connected to the catwalk face net when leaving, and is slid to the mid-span of the bridge with the face net. After sliding in place, the operator completes the catwalk face net connection, and then pulls back the construction trolley to the main tower through the traction steel wire rope. The present application accelerates the catwalk construction progress on the basis of safety.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of catwalk construction of suspension bridges, and particularly relates to a catwalk surface net downslide trolley for suspension bridges, a construction method and application. BACKGROUND

[0002] The catwalk is a temporary construction road that is erected below the main cable and is linear to the main cable during the construction of the suspension bridge, is an extremely important high-altitude construction platform for the upper structure work of the suspension bridge, is called the "suspended lifeline", and is used throughout the entire construction process of the upper structure. The constructors on the catwalk will complete a series of processes such as the traction of the cable, the tightening of the cable, the winding of the main cable, and the hoisting of the steel box girder. The catwalk is composed of the bearing cable, the handrail cable, the catwalk surface layer, the tower top cable turning saddle and the displacement system, the transverse passage, the portal system, and the anchoring system. For the catwalk surface net downslide, the counterweight or the self-weight is usually used for downslide, but for the upper structure construction of the large-span suspension bridge, the catwalk is long and heavy, and the conventional downslide method is difficult to use for construction. The catwalk surface net is heavy, and the required pulling force is large, so it is necessary to use the segmented downslide method to slide into place at one time. Therefore, the segmented connection personnel operation platform of the catwalk is a construction organization problem to be solved.

[0003] In the conventional suspension bridge construction process, the catwalk surface net is constructed by using the downslide method. When laying, the front end of the surface net is installed with the transverse passage or the counterweight to drive the surface net to slide down. The surface net and the section steel are clamped on the catwalk bearing cable by using the U-shaped bolt. In order to prevent the surface net from sliding down too fast, the winch is arranged on the tower top portal to pull back. The steel wire rope of the counterpulling winch is connected to the surface layer net section steel in sequence to control the downslide speed of the entire surface layer until the surface layer slides to the installation position. When the surface net slides to the gently sloping section, the self-weight cannot be used for downslide, so the pulling device is used to pull the transverse passage by the rope head until the cross section is closed. For the catwalk surface net construction of the large-span suspension bridge, if the downslide method is used for construction, as the length of the catwalk surface layer increases, the required pulling force for pulling is large, and the construction efficiency is low. If the segmented downslide direct to position method is used for construction, that is, the catwalk surface net is installed in sections, is downslid in sections, and is symmetrically installed on both sides, the construction progress of the catwalk can be accelerated, the construction efficiency is improved, and the safety of the catwalk construction is also significantly reduced. Therefore, a device that can transport the construction personnel to the position of the catwalk surface net at one time for construction operation is needed. SUMMARY

[0004] To solve the above technical problems, the present application provides a catwalk surface net downslide trolley for suspension bridges, a construction method and application.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0006] A catwalk surface net downslide trolley for suspension bridges comprises

[0007] The trolley main frame is rectangular, and a through hole for personnel to pass through is formed in the center of the trolley main frame.

[0008] The bottom basket is fixedly connected to the lower surface of the trolley main frame and faces the through hole.

[0009] The walking mechanism is fixedly connected to the lower surface of the trolley main frame and is symmetric about the bottom basket.

[0010] The traction steel wire rope is connected to the trolley main frame at two ends.

[0011] The guardrail is fixedly connected to the upper surface of the trolley main frame.

[0012] The trolley main frame comprises two cross beams, two longitudinal beams and first panels; the two cross beams and the two longitudinal beams form a rectangular frame; the two first panels are fixedly connected to the two sides of the upper surface of the rectangular frame, and a through hole for personnel to pass through is formed between the two first panels; a pair of traction lugs is fixedly connected to the outer side wall of the cross beam on one side of the through hole; the two longitudinal beams are fixedly connected with a lifting mechanism at the center of the upper surface; and a plurality of first stiff plates are fixedly connected to the cross beam and the longitudinal beam.

[0013] The cross beam and the longitudinal beam are made of profile steel; the traction lug is an integrated structure composed of a rectangular plate and a triangular plate arranged left and right, and the top corner of the triangular plate is processed into a circular arc; a circular through hole is formed at the center of the triangular plate; and a circular ring-shaped first reinforcing steel plate is fixedly connected to the two sides of the circular through hole.

[0014] The lifting mechanism comprises a lifting lug, a stiffener and a second reinforcing steel plate; the lifting lug is an integrated structure composed of a rectangular plate and a triangular plate arranged up and down, and the top corner of the triangular plate is processed into a circular arc; a circular through hole is formed at the center of the triangular plate; and a circular ring-shaped second reinforcing steel plate is fixedly connected to the two sides of the circular through hole; and two groups of stiffeners are fixedly connected to the two sides of the bottom of the rectangular plate.

[0015] The bottom basket comprises a second panel, a distribution beam, a stand and a bottom beam; two distribution beams are arranged, and at least four bottom beams are arranged; the bottom beams form a rectangular frame, and the distribution beams are fixedly connected in the rectangular frame; a plurality of stands are arranged, and the plurality of stands are fixedly connected to the upper surface of the rectangular frame in a vertical and uniform manner; the top end of each stand is fixedly connected to the lower surface of the trolley main frame, and a horizontal rod is arranged between adjacent stands; and the second panel is laid on the rectangular frame.

[0016] The walking mechanism comprises a plurality of sets of rolling units, and the number of sets is even; the even number of sets of rolling units are evenly divided into two groups, and the two groups of rolling units are fixedly connected to the lower surface of the trolley main frame on both sides of the bottom basket.

[0017] Each set of the rolling unit comprises an ear plate, a steel wheel, a first bolt set, a second bolt set and a second stiff plate; the ear plate is provided with two plates, which are arranged on the two sides of the steel wheel, the upper part of the two plates is connected with the steel wheel through the first bolt set, and the lower part of the two plates is connected through the second bolt set; the second stiff plate is provided with four plates, which are divided into two groups, each group comprises two plates; the two groups of second stiff plates are vertically and fixedly connected to the upper part of each ear plate, and the top of each second stiff plate is flush with the top of the ear plate; the top end of the four second stiff plates is fixedly connected to the lower surface of the trolley main frame.

[0018] A catwalk surface net construction method for a suspension bridge adopts a catwalk surface net downslide trolley for a suspension bridge, and comprises the following steps,

[0019] Step one: after the single-section catwalk surface net is constructed at the top of the tower, the catwalk surface net downslide trolley for a suspension bridge is connected with the catwalk surface net, one single-section catwalk surface net is connected to the left side and the right side of the catwalk surface net downslide trolley for a suspension bridge respectively; the walking mechanism on the catwalk surface net downslide trolley for a suspension bridge is connected to the catwalk load cable between the suspension bridge towers, and is arranged behind the catwalk surface net; the traction steel wire rope is connected with the main tower winch;

[0020] Step two: the operator gets into the bottom basket;

[0021] Step three: the tower top counter-pulling winch is started, and the catwalk surface net section starts to slide down;

[0022] Step four: after being slid down to the position, the operator connects the catwalk sections through the trolley, returns to the bottom basket after the construction is completed, and pulls the catwalk surface net downslide trolley for a suspension bridge back to the main tower through the traction steel wire rope, so that the catwalk surface net downslide construction is completed.

[0023] The catwalk surface net downslide trolley for a suspension bridge is applied to the upper structure construction process of a long-span suspension bridge.

[0024] Beneficial effects:

[0025] (1) The catwalk surface net downslide trolley for a suspension bridge comprises a trolley main frame, a bottom basket, a walking mechanism and a traction steel wire rope, and is mainly applied to the upper structure construction process of a long-span suspension bridge. The catwalk surface net construction organization is adjusted by using the catwalk surface net downslide trolley for a suspension bridge, the construction efficiency is greatly improved, and the construction period is shortened.

[0026] (2) The catwalk surface net downslide trolley for a suspension bridge provides a personnel operation platform for catwalk surface layer downslide construction, the construction trolley runs safely and reliably along with the surface layer, and good economic benefits are created for the project and the enterprise.

[0027] (3) The present application can directly reach from the side span to the middle span to operate, greatly improving the construction progress of the catwalk on the basis of safety, and providing a safe and stable operation platform for the catwalk surface layer segmented sliding connection.

[0028] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, and to implement the content of the specification, the following will be described in detail with the preferred embodiments of the present application and in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments or prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0030] Figure 1 is the front view of the present application.

[0031] Figure 2 is the side view of the present application.

[0032] Figure 3 is the top view of the present application.

[0033] Figure 4 is the front view of the trolley main frame in the present application.

[0034] Figure 5 is the top view of the trolley main frame in the present application.

[0035] Figure 6 is the front view of the bottom basket in the present application.

[0036] Figure 7 is the side view of the bottom basket in the present application.

[0037] Figure 8 is the front view of the walking wheel in the present application.

[0038] Figure 9 is the side view of the walking wheel in the present application.

[0039] Figure 10 is the front view of the traction lug plate in the present application.

[0040] Figure 11 is the schematic view of the reinforcing steel plate in the present application.

[0041] Figure 12 is the front view of the hoisting lug plate in the present application.

[0042] Figure 13 is the side view of the hoisting lug plate in the present application.

[0043] In the figure: 1, cross beam; 2, longitudinal beam; 3, first panel; 4, traction lug; 5, hoisting lug; 6, traveling mechanism; 7, bottom basket; 8, second panel; 9, catwalk load bearing cable; 10, guardrail; 11, traction steel wire rope; 12, catwalk center line; 13, first stiffener; 14, distribution beam; 15, stand; 16, bottom beam; 17, lug; 18, steel wheel; 19, first bolt set; 20, second bolt set; 21, first reinforcing steel plate; 22, stiffener; 23, second reinforcing steel plate; 24, cross bar; 25, second stiffener. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0045] Embodiment one:

[0046] According to Figures 1-13 A catwalk face net downslide trolley for a suspension bridge shown in the figure comprises

[0047] The trolley main frame is rectangular, and a through hole for personnel to pass through is formed in the central position of the trolley main frame;

[0048] The bottom basket 7 is fixedly connected to the lower surface of the trolley main frame and faces the through hole;

[0049] The traveling mechanism 6 is fixedly connected to the lower surface of the trolley main frame and is symmetric about the bottom basket 7;

[0050] The traction steel wire rope 11 is connected to the trolley main frame at both ends.

[0051] In actual use, after the single-segment catwalk face net is constructed at the tower top position, the catwalk face net downslide trolley for a suspension bridge is connected to the catwalk face net, one single-segment catwalk face net is connected to each of the left and right sides of the catwalk face net downslide trolley for a suspension bridge; the traveling mechanism 6 on the catwalk face net downslide trolley for a suspension bridge is connected to the catwalk load bearing cable 9 between the suspension bridge tower anchors and is placed behind the catwalk face net; the traction steel wire rope 11 is connected to the main tower winch; then, the operator gets into the bottom basket 7; the tower top counter-pulling winch is started, and the catwalk face net segment starts to slide down; after the catwalk face net slides into position, the operator performs the catwalk segment connection operation through the trolley, after the construction is completed, the operator returns to the bottom basket 7, and the catwalk face net downslide trolley for a suspension bridge is pulled back to the main tower through the traction steel wire rope 11, thereby completing the downslide construction of the catwalk face net segment.

[0052] The catwalk face net stage reduces the influence of the operation platform on the midspan connection construction, broadens the catwalk face net sliding construction ideas and methods, has strong practicability, reliable safety performance, and high construction efficiency.

[0053] Example Two:

[0054] According to Figure 1 and Figure 2 A catwalk face net sliding trolley of a suspension bridge, different from example one, further comprises a guardrail 10; the guardrail 10 is fixedly connected to the periphery of the upper surface of the trolley main frame.

[0055] In actual use, the setting of the guardrail 10 further ensures the safety of the operator during the construction process.

[0056] Example Three:

[0057] According to Figures 1-5 A catwalk face net sliding trolley of a suspension bridge, different from example one, the trolley main frame comprises two cross beams 1, two longitudinal beams 2 and a first panel 3; the two cross beams 1 and the two longitudinal beams 2 form a rectangular frame; the two first panels 3 are fixedly connected to the two sides of the upper surface of the rectangular frame in a symmetrical manner, and a through hole for personnel to pass through is formed between the two first panels 3; a pair of traction lugs 4 is fixedly connected to the outer side wall of the through hole side cross beam 1 in a symmetrical manner, and the traction lugs 4 are connected with the traction steel wire rope 11; a hoisting mechanism is fixedly connected to the center position of the upper surface of each longitudinal beam 2; a plurality of first stiff plates 13 are fixedly connected to the cross beam 1 and the longitudinal beam 2.

[0058] In actual use, the trolley main frame adopts the above technical solution, which ensures the connection between the trolley main frame and the bottom basket 7 and the main tower.

[0059] In specific application, the first stiff plate 13 is arranged at a position directly above the rolling unit in the walking mechanism 6, which ensures the strength required for its operation. The traction lug 4 is arranged on the cross beam 1 on the side facing the main tower, which facilitates the connection of the traction steel wire rope 11 with the winch on the main tower. In order to ensure the stability during traction, the perpendicular bisector between the two traction lugs 4 is collinear with the catwalk center line 12.

[0060] Example Four:

[0061] According to Figures 1-5 , Figure 10 and Figure 11The catwalk surface net down sliding trolley shown in the embodiment five is different from the embodiment three in that the cross beam 1 and the longitudinal beam 2 are made of profile steel; the traction lug plate 4 is an integral structure composed of left and right arranged rectangular plates and triangular plates, and the top corners of the triangular plates are processed into arc shapes; a circular through hole is formed in the center position of the triangular plate; and the two sides of the circular through hole are fixedly connected with circular ring-shaped first reinforcing steel plates 21.

[0062] In actual use, the cross beam 1 and the longitudinal beam 2 are made of profile steel, which is convenient to obtain and can well meet the strength requirement. The traction lug plate 4 adopts the above technical solution, which is convenient to connect and can avoid damage to the operating personnel and equipment caused by sharp corners.

[0063] The first reinforcing steel plates 21 are arranged to enhance the strength of the traction lug plate 4 and improve the safety factor.

[0064] Embodiment five:

[0065] According to the catwalk surface net down sliding trolley shown in the embodiments Figure 1 , Figure 3 , Figure 12 and Figure 13 , the catwalk surface net down sliding trolley is different from the embodiment three in that the hoisting mechanism includes a hoisting lug plate 5, a stiffening plate 22 and a second reinforcing steel plate 23; the hoisting lug plate 5 is an integral structure composed of up and down arranged rectangular plates and triangular plates, and the top corners of the triangular plates are processed into arc shapes; a circular through hole is formed in the center position of the triangular plate; the two sides of the circular through hole are fixedly connected with circular ring-shaped second reinforcing steel plates 23; and two groups of stiffening plates 22 are fixedly connected on the two sides of the bottom of the rectangular plate in a symmetrical manner.

[0066] In actual use, the arrangement of the hoisting mechanism facilitates the installation and dismounting of the catwalk surface net down sliding trolley on the catwalk load bearing cable 9.

[0067] The hoisting mechanism adopts the above technical solution, which guarantees the strength requirement thereof and thus guarantees the safety of the hoisting process.

[0068] Embodiment six:

[0069] According to the catwalk surface net down sliding trolley shown in the embodiments Figures 1-3 , Figure 6 and Figure 7The difference between the catwalk face net under sliding trolley shown in the embodiment and the embodiment one is that the bottom basket 7 comprises a second panel 8, a distribution beam 14, a stand column 15 and a bottom beam 16; the distribution beam 14 is provided with two beams at least, the bottom beam 16 is provided with four beams at least, the bottom beam 16 forms a rectangular frame, the distribution beam 14 is fixedly connected in the rectangular frame; the stand column 15 is provided with a plurality of stand columns, the plurality of stand columns 15 are fixedly connected in the upper surface of the rectangular frame perpendicularly and uniformly, the top end of each stand column 15 is fixedly connected with the lower surface of the trolley main frame, and the horizontal connecting rod 24 is horizontally connected between the adjacent stand columns 15; and the second panel 8 is laid on the rectangular frame.

[0070] In actual use, the bottom basket 7 is used for the back and forth transportation of the operating personnel from the side span to the middle span.

[0071] The bottom basket 7 adopts the above technical scheme, which is not only simple in structure, but also safe.

[0072] Embodiment seven:

[0073] According to the catwalk face net under sliding trolley shown in the embodiments Figure 1 , Figure 2 , Figure 8 and Figure 9 The difference between the catwalk face net under sliding trolley shown in the embodiment and the embodiment one is that the walking mechanism 6 comprises a plurality of sets of rolling units, and the number of sets is even, the even sets of rolling units are evenly divided into two groups, and the two groups of rolling units are fixedly connected on the lower surfaces of the trolley main frames on both sides of the bottom basket 7 symmetrically.

[0074] In actual use, the catwalk bearing cable 9 is provided with two groups left and right, and the number of the catwalk bearing cables 9 of the two groups is the same. The rolling unit in the technical scheme establishes a connection relationship with each catwalk bearing cable 9, so as to ensure the stability of the sliding of the catwalk face net under sliding trolley of the suspension bridge.

[0075] Embodiment eight:

[0076] According to the catwalk face net under sliding trolley shown in the embodiments Figure 1 , Figure 2 , Figure 8 and Figure 9The difference between the catwalk surface net sliding trolley shown in the embodiment and the embodiment seven is that each set of the rolling unit comprises an ear plate 17, a steel wheel 18, a first bolt set 19, a second bolt set 20 and a second stiff plate 25; the ear plate 17 is provided with two plates, the two ear plates 17 are arranged on the two sides of the steel wheel 18, the upper part of the two ear plates 17 is connected with the steel wheel 18 through the first bolt set 19, and the lower part of the two ear plates 17 is connected through the second bolt set 20; the second stiff plate 25 is provided with four plates, the four second stiff plates 25 are divided into two groups, each group comprises two plates; the two groups of second stiff plates 25 are respectively fixedly connected to the upper part of each ear plate 17 perpendicularly, and the top of each second stiff plate 25 is flush with the top of the ear plate 17; the top end of the four second stiff plates 25 is fixedly connected to the lower surface of the trolley main frame.

[0077] The rolling unit in the embodiment is provided with 10 sets; in actual use, the number of the rolling units is determined according to the number of the catwalk load bearing cables 9.

[0078] The steel wheel 18 in the embodiment adopts an inner groove steel wheel, which has better containment for the catwalk load bearing cable 9, so that the rolling of the steel wheel 18 on the catwalk load bearing cable 9 is safer.

[0079] Embodiment nine

[0080] A catwalk surface net construction method of a suspension bridge, which adopts a catwalk surface net sliding trolley of a suspension bridge, comprises the following steps,

[0081] Step one: after the single-section catwalk surface net is constructed at the tower top position, the catwalk surface net sliding trolley of the suspension bridge is connected with the catwalk surface net, one single-section catwalk surface net is connected to each of the left and right sides of the catwalk surface net sliding trolley of the suspension bridge; the walking mechanism 6 on the catwalk surface net sliding trolley of the suspension bridge is connected to the catwalk load bearing cable 9 between the suspension bridge towers and is placed behind the catwalk surface net; the traction steel wire rope 11 is connected with the main tower winch;

[0082] Step two: the operator gets into the bottom basket 7;

[0083] Step three: the tower top counter-pulling winch is started, and the catwalk surface net section starts to slide down;

[0084] Step four: after being slid down to the position, the operator connects the catwalk sections through the trolley, returns to the bottom basket 7 after the construction is completed, and pulls the catwalk surface net sliding trolley of the suspension bridge back to the main tower through the traction steel wire rope 11, so that the catwalk surface net sliding construction of one section is completed.

[0085] The present application is designed based on a segmented catwalk surface layer structure system. By using the method, the catwalk surface net can be segmented and slid into place at one time, the operating personnel can connect the segments when the catwalk surface net sliding trolley reaches the position of the catwalk surface net, and the catwalk surface net sliding trolley can return to the tower after the connection is completed.

[0086] The use of the catwalk surface net sliding trolley adjusts the catwalk surface net construction organization, greatly improves the construction efficiency, shortens the construction period, provides an operating platform for the catwalk surface layer sliding construction, and makes the construction trolley run safely and reliably with the surface layer, thereby creating good economic benefits for the project and the enterprise.

[0087] Example ten:

[0088] The application of the catwalk surface net sliding trolley for a suspension bridge applies the catwalk surface net sliding trolley for a suspension bridge to the construction process of the superstructure of a long-span suspension bridge.

[0089] The catwalk surface net sliding trolley for a suspension bridge can segment and slide the catwalk surface net into place at one time, which greatly improves the construction efficiency and shortens the construction period compared with the method of laying from the side span to the midspan bit by bit in the prior art, thereby creating good economic benefits for the project and the enterprise, and being worthy of popularization and application.

[0090] In the case of no conflict, those skilled in the art can combine the technical features related in the above examples according to the actual situation to achieve the corresponding technical effects. For various combinations, this will not be described one by one.

[0091] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0092] In addition, the descriptions of "first", "second", etc. in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features.

[0093] The above is only the preferred embodiments of the present application, and the present application will not be limited to these embodiments shown in the text, but will conform to the widest scope consistent with the principles and novel features disclosed in the text. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still belongs to the scope of the technical solutions of the present application.

Claims

1. A catwalk face net under slide trolley for a suspension bridge catwalk, characterized in that: Comprising The trolley main frame is a rectangle, and a through hole for personnel to pass through is formed in the center position of the trolley main frame; The bottom basket (7) is fixedly connected to the lower surface of the trolley main frame and faces the through hole; The walking mechanism (6) is fixedly connected to the lower surface of the trolley main frame and is symmetric about the bottom basket (7); The traction steel wire rope (11) has two ends respectively connected with the trolley main frame; The trolley main frame comprises two cross beams (1), two longitudinal beams (2) and a first panel (3); the two cross beams (1) and the two longitudinal beams (2) form a rectangular frame; two first panels (3) are fixedly connected to the two sides of the upper surface of the rectangular frame, and a through hole for personnel to pass through is formed between the two first panels (3); a pair of traction lugs (4) are fixedly connected to the outer side wall of the cross beam (1) on one side of the through hole, and the traction lugs (4) are connected with the traction steel wire rope (11); one hoisting mechanism is fixedly connected to the upper surface center position of each longitudinal beam (2); a plurality of first stiff plates (13) are fixedly connected to the cross beam (1) and the longitudinal beam (2); The hoisting mechanism comprises a hoisting lug (5), a stiffener (22) and a second reinforcing steel plate (23); the hoisting lug (5) is an integral structure composed of a rectangular plate and a triangular plate arranged in an up-down manner, and the top corner of the triangular plate is processed into a circular arc shape; a circular through hole is formed in the center position of the triangular plate; a circular ring-shaped second reinforcing steel plate (23) is fixedly connected to the two sides of the circular through hole; two groups of stiffeners (22) are fixedly connected to the two sides of the bottom of the rectangular plate in a symmetrical manner; The bottom basket (7) comprises a second panel (8), a distribution beam (14), a stand column (15) and a bottom beam (16); two distribution beams (14) are arranged, and at least four bottom beams (16) are arranged, the bottom beams (16) form a rectangular frame, and the distribution beams (14) are fixedly connected in the rectangular frame; a plurality of stand columns (15) are arranged, the plurality of stand columns (15) are fixedly connected in a vertical and uniform manner to the upper surface of the rectangular frame, the top end of each stand column (15) is fixedly connected to the lower surface of the trolley main frame, and a horizontal rod (24) is horizontally connected between adjacent stand columns (15); the second panel (8) is laid on the rectangular frame; The walking mechanism (6) comprises a plurality of sets of rolling units, and the number of sets is even; the even number of sets of rolling units are evenly divided into two groups, and the two groups of rolling units are fixedly connected to the lower surfaces of the trolley main frames on the two sides of the bottom basket (7) in a symmetrical manner; Each set of the rolling unit comprises an ear plate (17), a steel wheel (18), a first bolt set (19), a second bolt set (20) and a second stiff plate (25); the ear plate (17) is provided with two, which are arranged on the two sides of the steel wheel (18), the upper part of the two ear plates (17) is connected with the steel wheel (18) through the first bolt set (19), and the lower part of the two ear plates (17) is connected through the second bolt set (20); the second stiff plate (25) is provided with four, which are divided into two groups, each group has two; the two groups of second stiff plates (25) are respectively fixedly connected to the upper part of each ear plate (17) perpendicularly, and the top of each second stiff plate (25) is flush with the top of the ear plate (17); the top end of the four second stiff plates (25) is fixedly connected to the lower surface of the trolley main frame.

2. The catwalk deck net under slide trolley of claim 1, wherein: It also comprises a guardrail (10); the guardrail (10) is fixedly connected to the periphery of the upper surface of the trolley main frame.

3. The catwalk deck net downslide trolley of claim 1, wherein: The cross beam (1) and the longitudinal beam (2) adopt a profile steel; the traction ear plate (4) is an integral structure composed of a left and right arranged rectangular plate and a triangular plate, and the top corner of the triangular plate is processed into a circular arc shape; a circular through hole is formed in the center position of the triangular plate; the two sides of the circular through hole are fixedly connected with a circular ring-shaped first reinforcing steel plate (21).

4. A method for constructing a catwalk deck net of a suspension bridge, characterized by: The catwalk face net down sliding trolley of the suspension bridge adopts the catwalk face net down sliding trolley of the suspension bridge of any one of claims 1-3, comprising the following steps, Step one: after the single-section catwalk face net is constructed at the tower top position, the catwalk face net down sliding trolley of the suspension bridge is connected with the catwalk face net, one single-section catwalk face net is connected to each of the left and right sides of the catwalk face net down sliding trolley of the suspension bridge; the walking mechanism (6) on the catwalk face net down sliding trolley of the suspension bridge is connected to the catwalk load cable (9) between the suspension bridge towers, and is placed behind the catwalk face net; the traction steel wire rope (11) is connected with the main tower winch; Step two: the operator gets into the bottom basket (7); Step three: the tower top counter-pulling winch is started, and the catwalk face net section starts to slide down; Step four: after sliding to the position, the operator connects the catwalk sections through the trolley, returns to the bottom basket (7) after the construction is completed, and pulls the catwalk face net down sliding trolley of the suspension bridge back to the main tower through the traction steel wire rope (11), thereby completing the catwalk face net down sliding construction.

5. The application of the catwalk face net under the slide trolley of the suspension bridge, characterized in that: The catwalk face net down sliding trolley of the suspension bridge of any one of claims 1-3 is applied to the upper structure construction process of a large-span suspension bridge.

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