Foot bridge structure

Abstract

The utility model relates to a foot bridge structure, and belongs to the technical field of simple suspension bridges in bridge engineering. According to the utility model, the Bailey pieces commonly used in the industry are used as the stiffening beams and the handrails, so that the rigidity of the foot bridge can be improved, and the problems of high processing difficulty and high cost of a steel truss are solved. The deformation control measure is adopted, the vertical rigidity of the bailey piece stiffening beam can be guaranteed, the pre-camber problem is solved, meanwhile, the non-linear deformation influence generated by pin joint of the bailey pieces is eliminated, and the calculation workload of the suspension bridge is reduced; the first steel wire rope is adopted as the suspender and connected with the main cable through the steel wire rope inserting and weaving technology, connecting pieces are reduced, and cost and construction period are saved. A plurality of second steel wire ropes are adopted as the main cable, the steel wire ropes are universal products in the industry, spot goods exist in the market, and ordering and machining are not needed. The cable saddle and the cable clamp assembly are both standard components and can adapt to main cables of different specifications, and the condition of universal products is achieved.

Description

Technical Field

[0001] The utility model relates to a pedestrian bridge structure, belonging to the technical field of simple suspension bridges in bridge engineering. Background Art

[0002] Simple suspension bridges are widely used in temporary river-crossing structures with small traffic volumes due to their short construction period, mature technology, low investment, and large spanning capacity. Existing suspension bridges use two main cables as the main load-bearing members. The main cables are spanned over the main towers and then connected to the anchor cables. A saddle is arranged at the top of the main tower, a cable clamp is arranged on the main cable, the cable clamp connects the suspender, the suspender is connected to a crossbeam below, and a bridge deck is laid on the crossbeam. The saddle and the cable clamp are made of cast steel, and the specifications of the main cables are determined according to calculations. The following deficiencies exist in using the existing technology:

[0003] 1. For suspension bridges with different spans and different bridge sites calculated, different main cable specifications are used. The main cables of each bridge need to be ordered from manufacturers for production, and the production period is relatively long.

[0004] 2. The saddle and the cable clamp adopt different structural dimensions with the change of the main cable specifications, and special molds need to be manufactured and customized for casting.

[0005] 3. The connection between the suspender of the suspension bridge and the main cable needs to use casting connectors, which have the problems of long processing period and high cost.

[0006] 4. The saddle is heavy, costly, has a long processing period, and is difficult to install.

[0007] 5. Due to the high processing difficulty and cost of the steel truss stiffening girder, no stiffening girder is adopted in pedestrian suspension bridges, resulting in prominent human-induced vibration problems of the pedestrian bridge.

[0008] 6. Due to the steep terrain on both sides, the distance between the loose cable clamp and the anchor cannot be too small, resulting in a large amount of excavation work behind the bridge tower. Content of the Utility Model

[0009] The first technical problem to be solved by the utility model is to provide a pedestrian bridge structure, which can solve the human-induced vibration problem of the pedestrian bridge on the premise of improving construction convenience and saving costs.

[0010] The technical solution adopted by the present utility model to solve the above technical problems is as follows: A pedestrian bridge structure includes main cables and cable towers arranged on both banks of a river. There are two main cables arranged at intervals along the width direction of the pedestrian bridge. At the top of each cable tower, a saddle corresponding to each main cable is fixedly provided. After the two ends of the main cable cross over the saddle, they are respectively connected and fixed to the anchor cables. A cable dispersion sleeve is provided at the part of the main cable before it is connected to the anchor cable. Along the length direction of each main cable, a plurality of suspension rods extending downward are connected at intervals. The suspension rods are first steel wires. Each main cable is composed of a plurality of second steel wires arranged in parallel. The suspension rods are connected to the main cable as a whole by means of wire rope splicing technology, and the connection part between the suspension rods and the main cable is clamped and fixed by a cable clip assembly. The cable clip assembly includes clamping plates symmetrically arranged on both sides of the main cable and locking bolts for connecting and fixing the clamping plates; at the bottom of the cable tower, there is a bearing platform. A Bailey girder stiffening beam is arranged in the interval area between the cable towers on both banks of the river. The two ends of the Bailey girder stiffening beam in the length direction are respectively installed on the support seats on the upper surface of the bearing platform through brackets. The brackets are fixedly connected to the Bailey girder stiffening beam. The support seats are fixedly provided on the upper surface of the bearing platform. The brackets are arranged on the rollers on the support seats through arc-shaped groove plates. The axis of the rollers is horizontally arranged along the width direction of the pedestrian bridge; the Bailey girder stiffening beam includes two groups of Bailey girders arranged at intervals along the width direction of the pedestrian bridge. Each group of Bailey girders extends along the length direction of the pedestrian bridge and is connected as a whole. The adjacent two Bailey girders in each group of Bailey girders are connected by a Bailey girder connection assembly. The Bailey girder connection assembly includes a first female joint and a first male joint located on the upper chord, and a second female joint and a second male joint located on the lower chord. The first female joint and the first male joint are connected by a first locking pin, and the second female joint and the second male joint are connected by a second locking pin. The lower end of the suspension rod is connected to the top end of the Bailey girder stiffening beam through a suspension rod connection assembly. The suspension rod connection assembly includes a fixed base plate. On the upper surface of the fixed base plate, two upper ear plates arranged oppositely are fixedly provided. On the lower surface of the fixed base plate, two lower ear plates arranged oppositely are fixedly provided. A fixed pulley is installed between the two upper ear plates. After the lower end of the suspension rod bypasses the fixed pulley, the end of the lower end of the suspension rod and the main body of the suspension rod are fixedly connected as a whole by a wire rope clip. The two lower ear plates are respectively arranged on both sides of the upper chord, and the first locking pin simultaneously connects the two lower ear plates with the first female joint and the first male joint as a whole. The upper chords corresponding to the first female joint and the first male joint are fixedly connected to the fixed base plate through first high-strength bolts; the Bailey girder connection assembly further includes second high-strength bolts for fixedly connecting the end vertical rods of adjacent two Bailey girders together. The second high-strength bolts are arranged at intervals along the height direction of the Bailey girder; a plurality of cross beams are fixedly arranged at intervals along the length direction on the lower chord. The deck structure is installed on the upper surface of the cross beams.

[0011] Furthermore, the two upper ear plates are arranged at intervals along the length direction of the pedestrian bridge.

[0012] Furthermore: The first high-strength bolt has a bolt upper nut arranged on the upper surface of the fixed base plate and a bolt lower nut arranged on the lower surface of the upper chord; the end vertical rods of two adjacent Bailey trusses are respectively a female joint vertical rod and a male joint vertical rod, and the second high-strength bolt is provided with an inner bolt nut and an outer bolt nut on both sides of the female joint vertical rod, and an inner bolt nut and an outer bolt nut on both sides of the male joint vertical rod.

[0013] Furthermore: The lower chords of the two groups of Bailey trusses are connected by wind-resistant tie rods; the end of the cross beam is connected to the upper chord on the same side by a diagonal brace.

[0014] Furthermore: The second wire ropes corresponding to the same main cable have the same diameter specification, the number of the second wire ropes corresponding to the same main cable is M, and the number of the second wire ropes accommodated by the cable clamp assembly is N. When the value of M is less than the value of N, there are N - M filling short wire ropes arranged in the cable clamp assembly. The filling short wire ropes have the same diameter specification as the second wire ropes, and the cable clamp assembly clamps and fixes the overall formed by the splicing part of the first wire rope, the second wire ropes and the filling short wire ropes.

[0015] Furthermore: The saddle includes a rubber saddle with a first arc surface on the upper surface and a horizontal surface on the bottom surface. The first arc surface is in an arched shape arched upward. There are multiple layers of arc-shaped steel plates arranged at intervals in the rubber saddle. The arc-shaped steel plates and the first arc surface are coaxial, and the central axis corresponding to the first arc surface extends along the width direction of the pedestrian bridge.

[0016] Furthermore: The loose cable sleeve is sleeved on the side of the cable tower far from the cable anchor.

[0017] Furthermore: The end of the cross beam is correspondingly connected with a wind cable stay. The wind cable stay is correspondingly connected with a wind cable main cable. The two ends of the wind cable main cable are anchored to the wind cable anchor block, and the wind cable anchor block is arranged on both banks of the river corresponding to the pedestrian bridge.

[0018] The main process steps during the implementation of the present utility model are as follows:

[0019] 1. According to the number of the second wire ropes corresponding to the designed main cable, evenly arrange the cable anchors on both banks at the bridge site, and construct the cable anchors according to the conventional process;

[0020] 2. Construct the cable tower by the conventional method and install the saddle on the top of the cable tower;

[0021] 3. Perform pre-tensioning on the second wire ropes corresponding to the main cable; erect the main cable and connect it to the cable anchors on both banks; at the same time, install the loose cable sleeve on the inner side of the bridge span (i.e., on the side of the cable tower far from the cable anchor);

[0022] 4. Process the connecting piece (fixed base plate + upper ear plate + lower ear plate + fixed pulley) between the suspender and the Bailey truss, and connect the lower end of the first wire rope corresponding to the suspender to the fixed pulley through the cooperation of wire rope clips;

[0023] 5. Connect the upper end of the first steel wire rope corresponding to the suspender rod to the main cable through the steel wire rope splicing process, and install the cable clamp assembly;

[0024] 6. Install Bailey plate stiffening beams (all Bailey plate standard components are installed at this stage, only the first and second high-strength bolts are reserved and not installed);

[0025] 7. Install the bridge deck structure;

[0026] 8. Install the first high-strength bolt and the second high-strength bolt to achieve Bailey plate stiffness locking.

[0027] The beneficial effect of the utility model is that the Bailey plate commonly used in the industry is used as a stiffening beam and a railing, which can improve the stiffness of the pedestrian bridge and avoid the problem of difficulty and high cost in processing steel trusses. The traditional standard Bailey plate is pinned at the male and female joints of the upper chord and the lower chord, and the pedestrian bridge needs to set a pre-camber. In the bridge state, the Bailey plate as a stiffening beam cannot provide vertical stiffness within its pinned deformation range. The utility model adopts deformation control measures (a combination of the first high-strength bolt and the second high-strength bolt) to ensure the vertical stiffness of the Bailey plate stiffening beam, solve the pre-camber problem, and eliminate the nonlinear deformation effect caused by the Bailey plate pin connection, reducing the calculation workload of the suspension bridge (in order to make full use of the vertical stiffness of the Bailey plate, if the first high-strength bolt and the second high-strength bolt of the utility model are not provided, the total amplitude of the upward and downward changes is more than 1m, and the Bailey plate does not provide vertical stiffness when changing in this range). The utility model adopts a first steel wire rope as a hanger, and utilizes the steel wire rope splicing technology to connect with the main cable, thereby reducing connectors, saving costs and construction period. The utility model adopts multiple second steel wire ropes as the main cable. The steel wire rope is a common product in the industry, and is available on the market, so there is no need to order and process it. The saddle and cable clamp components in the utility model are all standard components, which can adapt to main cables of different specifications and meet the conditions of a universal product. In addition, the main body of the saddle in the utility model is made of rubber material, which is lighter, easier to process, and has lower cost than traditional saddles. The utility model adopts the method of setting the loose cable sleeve between the bridge spans, which increases the distance between the loose cable sleeve and the anchor, reduces the space requirement behind the bridge tower, and thus reduces the amount of excavation work behind the bridge tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an elevation view of the utility model in the length direction of the footbridge;

[0029] Figure 2 yes Figure 1 A partial enlarged view of the middle left area;

[0030] Figure 3 yes Figure 1Partial enlarged view of the bottom position of the left pylon in

[0031] Figure 4 is the plan view of the present utility model (only the left area is shown, and the right area is symmetrically arranged with this);

[0032] Figure 5 is the schematic structural diagram of the hanger connection assembly between the lower end of the hanger and the Bailey girder stiffening girder in the present utility model (the upper chord and vertical members of the Bailey girder stiffening girder are not shown);

[0033] Figure 6 is Figure 5 the schematic structural diagram in the side view direction (the upper chord and vertical members of the Bailey girder stiffening girder are shown, and the first high-strength bolt is not shown);

[0034] Figure 7 is the schematic structural diagram of the connection structure between two adjacent Bailey girders on the same side in the present utility model;

[0035] Figure 8 is Figure 7 the partial enlarged schematic view of the docking part of two adjacent Bailey girders in

[0036] Figure 9 is Figure 8 the specific schematic structural diagram of the second high-strength bolt in

[0037] Figure 10 is the elevation view of the present utility model in the width direction of the pedestrian bridge;

[0038] Figure 11 is the partial view of the connection structure between the cross beam and the wind cable stay in the present utility model;

[0039] Figure 12 is the schematic structural diagram of the cooperation and connection structure of the cable clip assembly, the hanger and the main cable in the present utility model;

[0040] Figure 13 is the schematic structural diagram of the saddle in the present utility model;

[0041] Figure 14 is Figure 13 the A-A schematic view of

[0042] Markings in the figure: pylon 1, main cable 2, saddle 3, rubber saddle 31, arc-shaped steel plate 32, cable anchor 4, cable spreader 5, suspender 6, cable clip assembly 7, Bailey girder stiffening girder 8, Bailey girder 80, upper chord 81, lower chord 82, first locking pin 83, second locking pin 84, second high-strength bolt 85, inner bolt nut 851, outer bolt nut 852, cross beam 86, wind resistance tie rod 87, diagonal brace 88, wind hook hole 89, fixed base plate 91, upper ear plate 92, lower ear plate 93, fixed pulley 94, first high-strength bolt 95, upper bolt nut 951, lower bolt nut 952, support seat 10, bracket 11, main wind cable 12, wind cable anchor 13, wind cable stay 14, safety clip 15, connecting ring 16, longitudinal beam 17, bridge deck 18, steel wire rope strand 19. Detailed implementation mode

[0043] The present utility model will be further described below with reference to the accompanying drawings.

[0044] As Figures 1 to 14 shown, the present utility model includes a main cable 2 and pylons 1 arranged on both banks of the river. The main cable 2 is composed of two cables arranged at intervals along the width direction of the pedestrian bridge. At the top of the pylon 1, a saddle 3 corresponding to each main cable 2 is fixedly arranged. After the two ends of the main cable 2 cross the saddle 3, they are respectively connected and fixed to the cable anchor 4. A cable spreader 5 is arranged at the part of the main cable 2 before connecting to the cable anchor 4. Along the length direction of each main cable 2, a plurality of suspenders 6 extending downward are connected at intervals. The suspenders 6 are first steel wires. Each main cable 2 is composed of a plurality of second steel wires arranged in parallel. The suspenders 6 are connected to the main cable 2 as a whole by means of wire rope splicing technology, and the connection part of the suspenders 6 and the main cable 2 is clamped and fixed by a cable clip assembly 7, that is, it is equivalent to splitting the strands at the upper end of the first steel wire to form Figure 12 the steel wire rope strand 19 shown in the figure. The steel wire rope strand 19 is filled into the gap between the corresponding plurality of second steel wires of the main cable 2, increasing the density of the cable clip assembly 7 on the main cable 2. At the same time, the force on the main cable 2 can be more clearly defined; the force mode of the main cable 2 is consistent with the calculation diagram. At the same time, the tensile force of the suspender 6 in this connection mode acts on the axis of the main cable 2, and no local bending moment is generated on the main cable 2.

[0045] More specifically, the cable clip assembly 7 includes clamping plates symmetrically arranged on both sides of the main cable 2 and locking bolts for connecting and fixing the clamping plates; in Figure 12 the shown embodiment, the clamping plates are two arranged at intervals left and right. A set of locking bolts is arranged at the upper ends of the two clamping plates, and a set of locking bolts is arranged at the lower ends of the two clamping plates.

[0046] To further improve the versatility of the cable clip assembly 7, the second wire rope corresponding to the same main cable 2 has the same diameter specification, the number of the second wire ropes corresponding to the same main cable 2 is M, and the accommodation quantity of the second wire ropes corresponding to the cable clip assembly 7 is N. When the value of M is less than the value of N, there are N - M filling short wire ropes arranged in the cable clip assembly 7. The filling short wire ropes have the same diameter specification as the second wire ropes. The cable clip assembly 7 clamps and fixes the overall formed by the splicing part of the first wire rope, the second wire ropes and the filling short wire ropes. The specifications of the cable clip assembly 7 and the value of M can be reasonably designed according to the actual situation. For example, the specifications of the cable clip assembly 7 and the value of M can be designed according to a main span of 300 m. When the bridge span is less than 300 m, it can be adjusted by keeping the wire rope diameter unchanged and reducing the number of wire ropes. At the same time, wire rope segments (i.e., the "filling short wire ropes" mentioned above) are arranged at the vacant positions of the wire ropes reduced in the inner cavity of the cable clip assembly 7 for filling, so as to realize the versatility of the cable clip assembly 7. The bottom of the pylon 1 has a bearing platform. A Bailey girder stiffening beam 8 is arranged in the interval area between the pylons 1 on both banks of the river. The bottom parts at both ends in the length direction of the Bailey girder stiffening beam 8 are respectively installed on the support seats 10 on the upper surface of the bearing platform through brackets 11. The brackets 11 are fixedly connected with the Bailey girder stiffening beam 8. The support seats 10 are fixedly arranged on the upper surface of the bearing platform. The brackets 11 are arranged on the rollers on the support seats 10 through arc-shaped groove plates. The axes of the rollers are horizontally arranged along the width direction of the pedestrian bridge. The brackets 11 and the support seats 10 are both standard components of the traditional Bailey girder assembly. The arc-shaped groove plates usually have a semi-circular groove structure, and their arc-shaped inner walls form a rolling fit with the rollers. The fixing components of the support seats 10 can generally be fixedly connected with the embedded parts on the upper surface of the bearing platform through bolts.

[0047] Specifically, the Bailey girder stiffening beam 8 includes two groups of Bailey girders 80 arranged at intervals along the width direction of the pedestrian bridge. Each group of Bailey girders 80 extends along the length direction of the pedestrian bridge and is connected into a whole. The adjacent Bailey girders 80 in each group of Bailey girders 80 are connected through Bailey girder connection components.

[0048] The main structure of the Bailey truss in the present utility model is generally the same as that of the existing conventional technology, which is welded by an upper chord 81, a lower chord 82, vertical rods and diagonal rods. The Bailey truss connection assembly includes a first female joint and a first male joint located on the upper chord 81, and a second female joint and a second male joint located on the lower chord 82. The first female joint and the first male joint are connected by a first locking pin 83, and the second female joint and the second male joint are connected by a second locking pin 84. The difference is that in the present utility model, the lower end of the suspension rod 6 is connected to the top end of the Bailey truss stiffening beam 8 through a suspension rod connection assembly. The suspension rod connection assembly includes a fixed base plate 91. On the upper surface of the fixed base plate 91, two upper ear plates 92 arranged oppositely are fixedly provided. On the lower surface of the fixed base plate 91, two lower ear plates 93 arranged oppositely are fixedly provided. The upper ear plates 92 and the lower ear plates 93 can generally be connected and fixed to the fixed base plate 91 by welding. A fixed pulley 94 is installed between the two upper ear plates 92. After the lower end of the suspension rod 6 bypasses the fixed pulley 94, the end of the lower end of the suspension rod 6 and the main body of the suspension rod 6 are fixedly connected into a whole through a wire rope clip. The two lower ear plates 93 are respectively arranged on both sides of the upper chord 81, and the first locking pin 83 simultaneously connects the two lower ear plates 93 with the first female joint and the first male joint into a whole. Another key difference point of the present utility model is that the upper chords 81 corresponding to the first female joint and the first male joint are fixedly connected to the fixed base plate 91 through first high-strength bolts 95; the Bailey truss connection assembly further includes second high-strength bolts 85 that fixedly connect the end vertical rods of two adjacent Bailey trusses 80 together. The second high-strength bolts 85 are arranged at intervals along the height direction of the Bailey truss 80. The combined structure of the first high-strength bolts 95 and the second high-strength bolts 85 can ensure the vertical stiffness of the Bailey truss stiffening beam 8, solve the pre-camber problem, and at the same time eliminate the influence of non-linear deformation generated by the pin connection of the traditional Bailey truss. To make the structure more reliable, more specifically, the first high-strength bolt 95 has a bolt upper nut 951 arranged on the upper surface of the fixed base plate 91 and a bolt lower nut 952 arranged on the lower surface of the upper chord 81; the end vertical rods of two adjacent Bailey trusses 80 are respectively a female joint vertical rod and a male joint vertical rod. The second high-strength bolt 85 is provided with a bolt inner nut 851 and a bolt outer nut 852 on both sides of the female joint vertical rod, and a bolt inner nut 851 and a bolt outer nut 852 on both sides of the male joint vertical rod. The female joint vertical rod and the male joint vertical rod are usually I-beams, and the bolt inner nut 851 and the bolt outer nut 852 are respectively arranged on both sides of the web of the I-beam to achieve stiffness control.

[0049] Along the length direction of the pedestrian bridge, a plurality of cross beams 86 are fixedly arranged at intervals on the lower chord 82, and the deck system structure is installed on the upper surface of the cross beams 86. The installation method of the cross beams 86 and the installation method of the deck system structure can specifically refer to the implementation of the existing technology. The cross beams 86 can generally be connected and fixed to the corresponding vertical rods in the Bailey truss 80 by bolt assemblies. The deck system structure generally includes structural members such as longitudinal beams 17 and bridge decks 18.

[0050] Two lower ear plates 93 are respectively arranged on both sides of the upper chord 81, that is, it is equivalent to arranging the two lower ear plates 93 at intervals along the width direction of the pedestrian bridge. In order to make the structure more reliable, the two upper ear plates 92 are preferably arranged at intervals along the length direction of the pedestrian bridge, that is, it is equivalent to that on the horizontal reference plane corresponding to the fixed base plate 91, the projections of the upper ear plate 92 and the lower ear plate 93 are perpendicular to each other.

[0051] In order to make the structure more reliable, the lower chords 82 of the two groups of Bailey trusses 80 are connected by wind-resistant tie rods 87. Generally, wind hook holes 89 for connecting the wind-resistant tie rods 87 can be arranged on the lower chords 82; the end of the cross beam 86 and the upper chord 81 on the same side are connected by a diagonal brace 88.

[0052] Another key improvement point of the present utility model lies in that the saddle 3 includes a rubber saddle 31 with a first arc-shaped upper surface and a horizontal bottom surface. The first arc surface is in an arched shape that arches upward. A plurality of arc-shaped steel plates 32 are arranged at intervals in the rubber saddle 31. The arc-shaped steel plates 32 and the first arc surface are coaxial, and the central axis corresponding to the first arc surface extends along the width direction of the pedestrian bridge. The first arc surface is usually a circular arc surface, and the central axis corresponding to the first arc surface refers to the axis at the center of the circle (the central axis of the cylindrical surface corresponding to the first arc surface). During specific implementation, the width of the first arc surface (that is, the horizontal distance corresponding to the left and right end faces of the rubber saddle 31 in Figure 14 can be reasonably designed according to the actual situation. Since there is no need to design and process a groove structure corresponding to the steel wire rope one by one, the saddle 3 of the present utility model has better versatility and can adapt to main cables 2 of different specifications.

[0053] Preferably, the cable dispersion sleeve 5 is arranged on the side of the cable tower 1 away from the cable anchor 4, which increases the distance between the cable dispersion sleeve 5 and the anchor corresponding to the cable anchor 4, reduces the space requirement behind the bridge tower, and further reduces the excavation work amount behind the bridge tower.

[0054] Preferably, to improve the structural reliability, the end of the cross beam 86 is correspondingly connected with a wind cable stay 14, the wind cable stay 14 is correspondingly connected with a wind cable main cable 12, and both ends of the wind cable main cable 12 are anchored to the wind cable anchor 13. The wind cable anchor 13 is arranged on both banks of the river corresponding to the pedestrian bridge. The specific implementation manners of the wind cable stay 14, the wind cable main cable 12, and the wind cable anchor 13 can be implemented with reference to the prior art.

Claims

1. A pedestrian bridge structure, comprising a main cable (2) and a cable tower (1) arranged on both sides of a river, wherein the main cables (2) are two cables arranged at intervals along the width direction of the pedestrian bridge, a cable saddle (3) corresponding to each main cable (2) is fixedly arranged at the top of the cable tower (1), and both ends of the main cable (2) are respectively connected and fixed to the anchor cable (4) after crossing the cable saddle (3), and the main cable (2) is provided with a loose cable sleeve (5) at the position before being connected to the anchor cable (4), and each main cable (2) is connected to a plurality of suspension rods (6) extending downwardly at intervals along its length direction, characterized in that: The suspender (6) is a first steel wire rope, and each main cable (2) is composed of a plurality of second steel wire ropes arranged in parallel. The suspender (6) is connected to the main cable (2) as a whole by a steel wire rope splicing process, and the connection between the suspender (6) and the main cable (2) is clamped and fixed by a cable clamp assembly (7). The cable clamp assembly (7) includes clamping plates symmetrically arranged on both sides of the main cable (2) and locking bolts connecting and fixing the clamping plates. The bottom of the cable tower (1) has a pedestal, and the interval area between the cable towers (1) on both sides of the river channel is provided with a Bailey plate stiffening beam (8). The bottoms of both ends of the Bailey plate stiffening beam (8) in the length direction are respectively installed on a support seat (10) on the upper surface of the pedestal through a bracket (11), and the bracket (11) and the Bailey plate stiffening beam (8) are connected to the cable tower (1) and the cable tower (1) are connected to the Bailey plate stiffening beam (8). ) is fixedly connected, the support seat (10) is fixedly arranged on the upper surface of the support platform, the bracket (11) is mounted on the roller on the support seat (10) through an arc-shaped groove plate, and the axis of the roller is arranged horizontally along the width direction of the pedestrian bridge; the Bailey plate stiffening beam (8) includes two groups of Bailey plates (80) arranged at intervals along the width direction of the pedestrian bridge, each group of Bailey plates (80) is extended and arranged along the length direction of the pedestrian bridge and connected to form a whole, and two adjacent Bailey plates (80) in each group of Bailey plates (80) are connected by a Bailey plate connecting assembly, and the Bailey plate connecting assembly includes a first female joint and a first male joint located on the upper chord rod (81), and a second female joint and a second male joint located on the lower chord rod (82), and the first female joint and the first male joint are connected to each other. The joints are connected by a first locking pin (83), the second female joint and the second male joint are connected by a second locking pin (84), the lower end of the suspension rod (6) is connected to the top end of the Bailey plate stiffening beam (8) through a suspension rod connection assembly, the suspension rod connection assembly comprises a fixed base plate (91), the upper surface of the fixed base plate (91) is fixedly provided with two upper ear plates (92) arranged opposite to each other, the lower surface of the fixed base plate (91) is fixedly provided with two lower ear plates (93) arranged opposite to each other, a fixed pulley (94) is installed between the two upper ear plates (92), the lower end of the suspension rod (6) is fixedly connected to the end of the lower end of the suspension rod (6) and the main body of the suspension rod (6) by a wire rope clamp after the lower end of the suspension rod (6) passes around the fixed pulley (94), and the two lower The ear plates (93) are arranged on both sides of the upper chord (81), and the first locking pin (83) simultaneously connects the two lower ear plates (93) with the first female joint and the first male joint to form a whole, and the upper chord (81) corresponding to the first female joint and the first male joint are fixedly connected to each other through the first high-strength bolt (95) and the fixed base plate (91); the Bailey plate connection assembly also includes a second high-strength bolt (85) for fixing the end vertical rods of two adjacent Bailey plates (80) together, and the second high-strength bolt (85) is arranged at intervals along the height direction of the Bailey plates (80); a plurality of cross beams (86) are fixedly arranged at intervals on the lower chord (82) along the length direction of the pedestrian bridge, and the bridge deck system structure is installed on the upper surface of the cross beam (86).

2. A footbridge structure as claimed in claim 1, characterized in that: The two upper ear plates (92) are arranged at intervals along the length direction of the footbridge.

3. A footbridge structure as claimed in claim 1, characterized in that: The first high-strength bolt (95) comprises an upper bolt nut (951) arranged on the upper surface of the fixed base plate (91) and a lower bolt nut (952) arranged on the lower surface of the upper chord rod (81); the end vertical rods of two adjacent Bailey plates (80) are respectively a female joint vertical rod and a male joint vertical rod; the second high-strength bolt (85) is provided with an inner bolt nut (851) and an outer bolt nut (852) on both sides of the female joint vertical rod, and is provided with an inner bolt nut (851) and an outer bolt nut (852) on both sides of the male joint vertical rod.

4. A footbridge structure as claimed in claim 1, characterized in that: The lower chords (82) of the two groups of Bailey plates (80) are connected via a wind-resistant tension rod (87); the end of the crossbeam (86) is connected to the upper chord (81) on the same side via a diagonal brace (88).

5. A footbridge structure as claimed in claim 1, characterized in that: The second steel wire ropes corresponding to the same main cable (2) have the same diameter specifications, the number of second steel wire ropes corresponding to the same main cable (2) is M, the number of second steel wire ropes accommodated by the cable clamp assembly (7) is N, and when the value of M is less than the value of N, NM filling short steel wire ropes are arranged in the cable clamp assembly (7), and the filling short steel wire ropes have the same diameter specifications as the second steel wire ropes, and the cable clamp assembly (7) clamps and fixes the whole formed by the inserted part of the first steel wire rope, the second steel wire rope and the filling short steel wire ropes.

6. A footbridge structure as claimed in claim 1, characterized in that: The cable saddle (3) comprises a rubber saddle (31) whose upper surface is a first curved surface and whose bottom surface is a horizontal surface. The first curved surface is in an upwardly arched shape. Multiple layers of curved steel plates (32) are arranged in intervals in the rubber saddle (31). The curved steel plates (32) are coaxial with the first curved surface. The central axis corresponding to the first curved surface is arranged to extend along the width direction of the pedestrian bridge.

7. A footbridge structure as claimed in claim 1, characterized in that: The loose cable sleeve (5) is arranged on a side of the cable tower (1) away from the anchor cable (4).

8. A footbridge structure according to any one of claims 1 to 7, characterized in that: The ends of the crossbeam (86) are connected to wind cable stays (14), which are connected to wind cable main cables (12). Both ends of the wind cable main cables (12) are anchored to wind cable anchors (13), which are arranged on both sides of the river corresponding to the pedestrian bridge.

Images