Construction method of main beam of hollow thin-walled pier continuous rigid frame bridge and its No. 0 block bracket

Abstract

The present invention provides a No. 0 block bracket for the construction of a main beam of a continuous rigid frame bridge with a hollow thin-walled pier, comprising a lower embedded plate, an upper embedded plate, a tension screw, a triangular truss, a Bailey frame, an external distribution beam and an inner cavity distribution beam, wherein the lower embedded plate extends along the longitudinal direction of the bridge and is horizontally embedded in the hollow thin-walled pier, and its two opposite ends are respectively welded to a lower ear seat; the upper embedded plate extends along the longitudinal direction of the bridge and is horizontally embedded in the hollow thin-walled pier, and its two opposite ends are respectively abutted against an upper ear seat; the tension screw extends along the longitudinal direction of the bridge and is horizontally penetrated through the hollow thin-walled pier, and its two opposite ends are respectively detachably connected to an upper ear seat through nuts; each triangular truss is connected to a lower ear seat and an upper ear seat; the Bailey frame is mounted on the triangular truss; the external distribution beam is arranged on the Bailey frame; and the inner cavity distribution beam is arranged on the upper embedded plate. The No. 0 block bracket has high stability and load-bearing capacity. The present invention also provides a construction method for a main beam of a continuous rigid frame bridge with a hollow thin-walled pier.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering, and in particular to a construction method for a main beam of a hollow thin-walled pier continuous rigid frame bridge and a No. 0 block bracket thereof. Background Art

[0002] The main piers of continuous rigid frame bridges are mainly vertical double-leg thin-walled piers and vertical single-leg thin-walled piers. The vertical double-leg thin-walled pier is a pier with two parallel pier walls and main beams at the pier position, and the vertical single-leg thin-walled pier is a pier with only one cross-section of a hollow or solid "I"-shaped rectangular cross-section or box beam cross-section at the pier position. Compared with vertical double-leg thin-walled piers, vertical single-leg thin-walled piers usually have better torsion resistance and stronger thrust resistance, but their flexibility is not as good as that of vertical double-leg thin-walled piers. As the height of the pier body increases, the flexibility of the vertical single-leg thin-walled pier gradually increases. Therefore, for long-span continuous rigid frames with very high pier bodies, single thin-walled piers are one of the ideal pier body forms. The common vertical single-leg thin-walled pier is a hollow thin-walled pier, but due to its structure, its stress performance is poor and construction is difficult.

[0003] When constructing the main beam of a continuous rigid frame bridge, the No. 0 block is usually constructed on the pier first, and then the main beam is cast at the opposite ends of the No. 0 block along the longitudinal bridge direction by a cantilever casting construction method. When constructing the No. 0 block, a bracket needs to be fixed on the upper part of the pier to bear the construction load of the No. 0 block. For the No. 0 block on the hollow thin-walled pier, due to the poor stress performance of the hollow thin-walled pier, the traditional No. 0 block bracket can no longer meet the demand. The Chinese patent application number 201621002622.9 discloses a thin-walled hollow pier cap beam steel bracket, which is not restricted by site conditions, has high material utilization and load-bearing capacity. However, the bracket is suitable for the construction of the cap beam, and its steel bracket body and the pier are welded by pre-buried steel plates, and the tensile force that can be borne is relatively small. When it is used for the construction of the No. 0 block, especially the No. 0 block of a super-large bridge, it will not be applicable due to its poor bearing capacity.

[0004] Chinese patent application number 201120419086.3 discloses a No. 0 block bracket for a double thin-walled pier continuous rigid frame bridge, including three rows of reserved holes and cross beams arranged on the pier body. The reserved holes on the outer side of the pier body are respectively provided with connecting plates, trusses are erected on the connecting plates, and cross beams are arranged on the trusses; an inclined rod is hinged on each group of trusses, and a balance rod is provided at the connection between the inclined rod and the pier body, and the balance rod is arranged in the third row of reserved holes on the inner side of the pier body. It has the advantages of simple structure, easy disassembly and assembly, fast construction progress, safety and reliability, and can improve the durability of the bridge. However, the No. 0 block bracket is suitable for double thin-walled piers, which belong to separated bridge piers. It is necessary to set a balance rod to balance the horizontal pressure of the balanced diagonal rod on the thin-walled pier, while the hollow thin-walled pier is an integral bridge pier, and there is no problem of balancing the pier body; in addition, the bracket is provided with three rows of reserved holes, and the reserved holes on the outside of the pier body are respectively provided with connecting plates. The number of connecting plates is large, resulting in insufficient stability and bearing capacity of the bracket; furthermore, the bracket connecting plate is only connected to the pier body through fine-rolled threaded steel. When it is applied to hollow thin-walled piers, if the operation is improper during the installation process, it is easy to pull the bridge pier apart. Therefore, it is necessary to provide a No. 0 block bracket for continuous rigid frame bridges with hollow thin-walled piers that can improve the stability and bearing capacity of the bracket.

[0005] In addition, in the construction of continuous beams, conventional brackets are often designed separately, with large one-time investment, which is not conducive to turnover. The existing hanging basket's bearing truss is composed of a single diamond-shaped truss piece, which is mostly used for cantilever casting of small-segment concrete box beams. For the hanging basket cantilever casting construction of extra-large bridges, due to its long span and main beam segment division length, the hanging basket cantilever casting construction of extra-large bridges requires high stability of the hanging basket bearing truss, and the traditional hanging basket can no longer complete the cantilever casting construction of extra-large bridges. The Chinese invention patent application with application number 201210371174.X discloses a universal triangular hanging basket and bracket installation structure and its construction method, which realizes the universality of the bracket and the main truss of the hanging basket and reduces the one-time investment. However, when assembling the bracket, it is necessary to add a pressure rod at the bottom of the triangular hanging basket main truss to form the bracket main truss, which leads to a decrease in the positioning accuracy of the bracket. Summary of the invention

[0006] The present invention aims to solve at least one of the above-mentioned problems and provides a construction method for a main beam of a hollow thin-walled pier continuous rigid frame bridge and a No. 0 block bracket thereof.

[0007] A No. 0 block bracket for the construction of a main beam of a continuous rigid frame bridge with a hollow thin-walled pier, comprising a lower embedded plate, an upper embedded plate, a tension screw, a triangular truss, a Bailey frame, an external distribution beam and an inner cavity distribution beam, wherein the lower embedded plate extends along the longitudinal direction of the bridge and is horizontally embedded in the hollow thin-walled pier, and the opposite ends of the lower embedded plate are respectively welded to a lower ear seat; the upper embedded plate is located above the lower embedded plate, and the upper embedded plate extends along the longitudinal direction of the bridge and is horizontally embedded in the hollow thin-walled pier, and the opposite ends of the upper embedded plate are respectively abutted against an upper ear seat; the tension screw is located Above the lower embedded plate, the tension screw extends along the longitudinal bridge direction and horizontally passes through the hollow thin-walled pier, and the opposite ends of the tension screw extend out of the hollow thin-walled pier and are respectively detachably connected to one of the upper ear seats through a nut; the triangular truss is located on the outside of the hollow thin-walled pier, each triangular truss is vertically arranged, and is connected to one of the lower ear seats and an upper ear seat located directly above the lower ear seat; the Bailey frame is mounted on the triangular truss; the external distribution beam is mounted on the Bailey frame; the inner cavity distribution beam is mounted on the upper embedded plate.

[0008] A construction method for a main beam of a hollow thin-walled pier continuous rigid frame bridge comprises the following steps:

[0009] S1: Building a No. 0 block bracket on the hollow thin-walled pier to carry out the construction of No. 0 block, including the following steps:

[0010] Installation of the lower embedded plate: The lower embedded plate is embedded during the construction of the hollow thin-walled pier. The lower embedded plate extends along the longitudinal direction of the bridge and is horizontally embedded in the hollow thin-walled pier, so that the opposite ends of the lower embedded plate are welded to a lower ear seat respectively;

[0011] Installation of upper embedded plate: When constructing the hollow thin-walled pier, an upper embedded plate is embedded. The upper embedded plate is located above the lower embedded plate. The upper embedded plate extends along the longitudinal direction of the bridge and is horizontally embedded in the hollow thin-walled pier. The opposite ends of the upper embedded plate correspond to an upper ear seat respectively.

[0012] Installation of the tension screw: the tension screw is located above the lower embedded plate, extends along the longitudinal bridge direction, and horizontally penetrates the hollow thin-walled pier, the opposite ends of the tension screw extend out of the hollow thin-walled pier, and are detachably connected to one of the upper ear seats through nuts, and the nuts are tightened to make the upper ear seat abut against the upper embedded plate;

[0013] Installation of triangular trusses: the triangular trusses are located outside the hollow thin-walled piers, each triangular truss is arranged vertically, and is connected to a lower ear seat and an upper ear seat located directly above the lower ear seat;

[0014] Installation of Bailey frame: the Bailey frame is installed on the triangular truss;

[0015] Installation of external distribution beam: the external distribution beam is mounted on the Bailey frame;

[0016] Installation of the inner cavity distribution beam: the inner cavity distribution beam is mounted on the upper embedded plate;

[0017] Formwork installation: Install the formwork on the outer distribution beam and the inner cavity distribution beam, and pour concrete on the formwork to form block 0;

[0018] S2: Remove the block bracket, build a hanging basket, and use the hanging basket cantilever casting construction method to cast the main beam at the opposite ends of the block along the longitudinal direction of the bridge.

[0019] The above-mentioned No. 0 block bracket is designed according to the specific structure of the hollow thin-walled pier and the stress condition of the No. 0 block bracket. The triangular truss is connected by the upper ear seat and the lower ear seat. It is found through research that the upper ear seat mainly bears tension, while the lower ear seat mainly bears pressure. Therefore, the upper ear seats are connected by tension screws so that they can withstand greater tension. The lower ear seat is welded on the embedded steel to ensure that it has sufficient compressive resistance. Embedded steel is embedded between the upper ear seats and the lower ear seats. The embedded steel can improve the rigidity and strength of the pier body, avoid cracking of the pier body of the hollow thin-walled pier, thereby improving the stability and bearing capacity of the bracket; at the same time, the embedded steel can also be used to support the inner cavity distribution beam, so as to save materials and further reduce the difficulty of construction. The number of lower and upper ear seats used is relatively small, which further improves the bearing capacity and stability of the No. 0 block bracket, which is particularly suitable for the construction of No. 0 blocks on hollow thin-walled piers of extra-large bridges. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A side view of a No. 0 block bracket in a preferred embodiment of the present invention; Figure 2 for Figure 1 An enlarged view of the structure of the bracket portion of block 0 is shown; Figure 3 for Figure 1 A front view of the block bracket No. 0 is shown; Figure 4 for Figure 3 The top view of the bracket of block No. 0 along the line AA is shown; Figure 5 It is a side view of the hanging basket in a preferred embodiment of the present invention; Figure 6 for Figure 5 The cross-sectional view of the hanging basket along line II is shown; Figure 7 for Figure 5 A cross-sectional view of the hanging basket along line II-II; Figure 8 for Figure 5 The structural diagram of the load-bearing truss in the hanging basket shown; Fig. 9 for Figure 8 The structural diagram of the female triangular truss in the load-bearing truss shown; Fig.10 for Fig. 9 An enlarged view of the female triangular truss at position A is shown; Fig.11 for Fig.10 A top view of Fig.12 for Fig. 9 An enlarged view of the female triangular truss at position B is shown; Fig.13 for Fig.12 A top view of Fig.14 for Fig. 9 The enlarged view of the female triangular truss at position C is shown; Fig.15 for Fig.14 A cross-sectional view along line III-III; Fig.16 for Figure 8 The structural diagram of the male head triangular truss in the load-bearing truss shown; Fig.17 for Fig.16 The enlarged view of the female triangular truss at position D is shown; Fig.18 for Fig.17 A top view of Fig.19 for Fig.16 The enlarged view of the female triangular truss at position E is shown; Fig. 20 for Fig.19 A top view of Fig.21 for Fig.16 The enlarged view of the female triangular truss at F is shown; Fig. 22 for Fig.21 Cross-sectional view along line IV-IV; Fig.23 for Figure 5 A partial structural diagram of the hanging basket shown; Fig.24 for Fig.23 The structural diagram of the traveling trolley on the track cross section is shown; Fig.25 for Fig.23 The structural diagram of the boat in the hanging basket shown; Fig.26 for Fig.25 a right side view of the slip boat shown; Fig. 27 for Fig.23 A right side view of the anti-hook safety device in the hanging basket shown; Fig.28 for Fig.23 The structural diagram of the pad in the hanging basket shown; Fig.29 for Fig.28 A left side view of the first wedge-shaped block in the spacer block shown; Fig.30 for Fig.28 A right side view of the second wedge-shaped block in the spacer block shown; Fig.31 for Fig.23 The structural diagram of the sliding beam roller assembly in the hanging basket shown; Fig.32 for Fig.31 Cross-sectional view along line VV.

[0021] In the attached drawings: 110, lower embedded plate; 130, upper embedded plate; 200, tension screw; 310, lower ear seat; 330, upper ear seat; 400, triangular truss; 500, Bailey frame; 610, external distribution beam; 630, inner cavity distribution beam; 700, limiting protrusion; 800, connecting rod; 910, flange plate support frame; 930, support beam; 2, walking system; 21, track; 211, base; 213, guide rail; 2131, connecting plate; 2133, upper wing plate; 2135, lower wing plate; 23, walking trolley; 231, frame; 233, walking wheel; 24, pulley; 2 41. Slide support; 243. Slide plate; 245. Stop plate; 25. Walking jack; 27. Cushion block; 271. First wedge block; 273. Second wedge block; 275. Adjusting screw; 276. Locking nut; 28. Anti-hook safety device; 281. Fixing frame; 282. Hook; 3. Load-bearing truss assembly; 31. Load-bearing truss; 311. Female triangular truss; 3111. First straight side bar; 3112. Second straight side bar; 3113. Bevel bar; 3115. First reinforcing bar; 3117. Second reinforcing bar; 312. Male triangular truss; 3121. First right angle bar ; 3123, second right-angle rod; 3124, oblique rod; 3125, plug-in portion; 3126, plug-in pin hole; 3127, first stiffening rod; 3128, second stiffening rod; 313, main truss tie rod; 32, front transverse rod; 33, rear transverse rod; 34, scissors brace; 35, first mounting member; 351, first mounting plate; 3512, first pin hole; 36, second mounting member; 361, second mounting plate; 362, fixing portion; 363, limiting portion; 364, mounting cover plate; 365, mounting pin hole; 37, third mounting member; 371, socket; 372, third mounting plate; 3 74. Installing pin hole; 38. First connecting member; 381. First side plate; 3811. Second pin hole; 39. Second connecting member; 391. Second side plate; 394. Connecting cover plate; 395, 396, 303, 306, 71, 73. Pin shaft; 30. Third connecting member; 301. Third side plate; 305. Fixing pin hole; 4. Front cross beam; 42. Suspension belt; 5. Sliding beam; 6. Bottom beam; 61. Front suspension rod; 63. Rear suspension rod; 65. Suspension rod; 8. Sliding beam connector; 82. Connecting frame; 9. Sliding beam roller assembly; 91. Roller bracket; 93. Roller; 10. Shoulder pole beam. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] Please also see Figures 1 to 4 A preferred embodiment of the present invention provides a No. 0 block bracket for the construction of a main beam of a hollow thin-walled pier continuous rigid frame bridge, including a lower embedded plate 110, an upper embedded plate 130, a tension screw 200, a lower ear seat 310, an upper ear seat 330, a triangular truss 400, a Bailey frame 500, an external distribution beam 610 and an inner cavity distribution beam 630.

[0026] The lower embedded plate 110 extends along the longitudinal direction of the bridge and is horizontally embedded in the hollow thin-walled pier, and the opposite ends of the lower embedded plate 110 are respectively welded to a lower ear seat 310. The upper embedded plate 130 is located above the lower embedded plate 110, and the upper embedded plate 130 extends along the longitudinal direction of the bridge and is horizontally embedded in the hollow thin-walled pier, and the opposite ends of the upper embedded plate 130 are respectively abutted against an upper ear seat 330. Preferably, the upper embedded plate 130 and the lower embedded plate 110 are both steel sections. The tension screw 200 is located above the lower embedded plate 110, and the tension screw 200 extends along the longitudinal bridge direction and horizontally penetrates the hollow thin-walled pier. The opposite ends of the tension screw 200 extend out of the hollow thin-walled pier and are detachably connected to an upper ear seat 330 through a nut (not shown). Specifically, the end of the tension screw 200 located outside the hollow thin-walled pier passes through the upper ear seat 330, and the nut is threadedly connected to the tension screw 200 and abuts against the side of the upper ear seat 330 facing away from the hollow thin-walled pier. In this embodiment, there are multiple tension screws 200, and the multiple tension screws 200 are respectively located on opposite sides of the upper embedded plate 130.

[0027] The triangular truss 400 is located outside the hollow thin-walled pier. Each triangular truss 400 is vertically arranged and connected to a lower ear seat 310 and an upper ear seat 330 located directly above the lower ear seat 310. In this embodiment, the triangular truss 400 is detachably connected to the upper ear seat 330 and the lower ear seat 310 through a pin. The triangular truss 400 is detachably connected to the upper ear seat 330 and the lower ear seat 310. The upper ear seat 330 is detachably connected to the pier body through a tension screw 200. After the construction of block 0 is completed, the triangular truss 400, the upper ear seat 330 and the tension screw 200 can be reused, which is conducive to reducing costs. The Bailey frame 500 is erected on the triangular truss 400. The external distribution beam 610 is erected on the Bailey frame 500. The inner cavity distribution beam 630 is erected on the upper embedded plate 130. The outer distribution beam 610 and the inner cavity distribution beam 630 are both used to build templates for pouring.

[0028] In this embodiment, a limiting protrusion 700 is formed on one side of the triangular truss 400 away from the upper ear seat 330, which can limit the Bailey frame 500, further improving the safety of construction. Two adjacent triangular trusses 400 are also connected together by a connecting rod 800 to further improve the integrity of the bracket. In this embodiment, the opposite ends of each connecting rod 800 are detachably connected to the triangular truss 400 by bolts. The No. 0 block bracket also includes a plurality of flange plate support frames 910 and a support beam 930. The plurality of flange plate support frames 910 are respectively installed on the opposite sides of the hollow thin-walled pier along the transverse bridge, and the support beam 930 is mounted on the flange plate support frame 910. A template can be set on the support beam 930 for casting the flange plate of the main beam. Since the force at the flange plate is small, the connection method of the flange plate support frame 910 and the bridge pier can adopt the existing support frame fixing method, for example, it can be connected to the pier body through an embedded plate embedded in the pier body. The structure of the flange plate support frame 910 may be the same as that of the triangular truss 400, or other support frame structures in the prior art may be adopted.

[0029] This embodiment also provides a method for constructing a main beam of a hollow thin-walled pier continuous rigid frame bridge, comprising the following steps:

[0030] S1: Building a No. 0 block bracket on the hollow thin-walled pier to carry out the construction of No. 0 block, including the following steps:

[0031] Installation of the lower embedded plate 110: The lower embedded plate 110 is embedded during the construction of the hollow thin-walled pier. The lower embedded plate 110 extends along the longitudinal direction of the bridge and is horizontally embedded in the hollow thin-walled pier, so that the opposite ends of the lower embedded plate 110 are respectively welded to a lower ear seat 310;

[0032] Installation of the upper embedded plate 130: The upper embedded plate 130 is embedded during the construction of the hollow thin-walled pier. The upper embedded plate 130 is located above the lower embedded plate 110. The upper embedded plate 130 extends along the longitudinal direction of the bridge and is horizontally embedded in the hollow thin-walled pier. The opposite ends of the upper embedded plate 130 correspond to an upper ear seat 330 respectively.

[0033] Installation of the tension screw 200: The tension screw 200 is located above the lower embedded plate 110, extends along the longitudinal bridge direction, and horizontally penetrates the hollow thin-walled pier, and the opposite ends of the tension screw 200 extend out of the hollow thin-walled pier and are detachably connected to an upper ear seat 330 through a nut, respectively, and the nut is locked to make the upper ear seat 330 abut against the upper embedded plate 130; a through hole for the tension screw 200 to pass through is opened on the hollow thin-walled pier;

[0034] Installation of the triangular truss 400: The triangular truss 400 is located outside the hollow thin-walled pier. Each triangular truss 400 is vertically arranged and connected to a lower ear seat 310 and an upper ear seat 330 located directly above the lower ear seat 310. In this embodiment, the triangular truss 400 is detachably connected to the lower ear seat 310 and the upper ear seat 330 via a pin shaft.

[0035] Installation of Bailey frame 500: Bailey frame 500 is mounted on triangular truss 400. In the present embodiment, Bailey frame 500 is detachably connected to triangular truss 400 via U-shaped limit buckle; the structure of U-shaped limit buckle belongs to the prior art and will not be described here for the sake of space omission;

[0036] Installation of the external distribution beam 610: The external distribution beam 610 is mounted on the Bailey frame 500; in this embodiment, the external distribution beam 610 is detachably connected to the Bailey frame 500 via a U-shaped limit buckle;

[0037] Installation of the inner cavity distribution beam 630: The inner cavity distribution beam 630 is mounted on the upper embedded plate 130 by welding or other methods;

[0038] Formwork installation: Install the formwork on the outer distribution beam 610 and the inner cavity distribution beam 630, and pour concrete on the formwork to form block 0;

[0039] S2: Remove the bracket of block 0, build a hanging basket, and use the hanging basket cantilever casting construction method to cast the main beam at the opposite ends of block 0 along the longitudinal direction of the bridge.

[0040] Specifically, the removal of the block bracket No. 0 includes the following steps: after removing the template on the external distribution beam 610, the external distribution beam 610 and the Bailey frame 500 from the triangular truss 400 (the removal of the template, the external distribution beam 610 and the Bailey frame 500 belongs to the prior art and will not be repeated here to omit space), pull out the pin connecting the upper ear seat 330 and the triangular truss 400 and the pin connecting the lower ear seat 310 and the triangular truss 400, remove the triangular truss 400 from the upper ear seat 330 and the lower ear seat 310, unscrew the nut, remove the upper ear seat 330 from the tension screw 200, and then pull the tension screw 200 out of the hollow thin-walled pier; use a cutting machine to remove the flange plate support frame 910 from the pier body.

[0041] For details, please refer to Figures 8 to 22 In this embodiment, the triangular truss 400 includes a plurality of female triangular trusses 311 and a plurality of male triangular trusses 312 .

[0042] The female triangle truss 311 is a right-angled triangle frame, including a first straight side bar 3111, a second straight side bar 3112 and a hypotenuse bar 3113. One end of the first straight side bar 3111 and one end of the second straight side bar 3112 are welded to a first mounting member 35. The first straight side bar 3111 and the second straight side bar 3112 are vertically welded. The first mounting member 35 is detachably connected to the upper ear seat 330 through a pin shaft. The other end of the first straight side bar 3111 is welded to one end of the hypotenuse bar 3113 and both are welded to a second mounting member 36. The other end of the second straight side bar 3112 is welded to the other end of the hypotenuse bar 3113 and both are welded to a third mounting member 37. The third mounting member 37 is provided with a socket 371. The third mounting member 37 is detachably connected to the lower ear seat 310 through a pin shaft. The hypotenuse bar 3113 is detachably connected to the connecting rod 800 through a bolt. The Bailey frame 500 is erected on the first straight side rod 3111.

[0043] The male head triangular truss 312 is a right-angled triangular frame, including a first right-angle rod 3121, a second right-angle rod 3123 and an oblique rod 3124. One end of the first right-angle rod 3121 and one end of the second right-angle rod 3123 are welded to a first connecting member 38. The first right-angle rod 3121 and the second right-angle rod 3123 are vertically welded. The first connecting member 38 is detachably connected to the upper ear seat 330 through a pin shaft; the other end of the first right-angle rod 3121 is connected to the oblique rod 3124. 124 is welded and welded to a second connecting member 39; the other end of the second right-angle rod 3123 and the other end of the oblique rod 3124 are welded to a third connecting member 30, and the end of the second right-angle rod 3123 away from the first connecting member 38 and the end of the oblique rod 3124 away from the second connecting member 39 are welded and extend out of the third connecting member 30 to form a plug-in portion 3125, and the plug-in portion 3125 is detachably connected to the lower ear seat 310 through a pin. The oblique rod 3124 is detachably connected to the connecting rod 800 through bolts. The Bailey frame 500 is mounted on the first right-angle rod 3121.

[0044] When the hanging basket is constructed, the plug-in portion 3125 of a male triangular truss 312 is plugged into the socket 371 of a female triangular truss 311, and the plug-in portion 3125 is connected to the third mounting member 37 of the female triangular truss 311 by a latch; a main truss pull rod 313 is provided, and the opposite ends of the main truss pull rod 313 are respectively connected to the first mounting member 35 of the female triangular truss 311 and the first connecting member 38 of the male triangular truss 312 by pins 71 and 73, thereby forming a load-bearing truss 31 of the hanging basket, which is conducive to turnover and reduces costs; since the triangular truss 400 of the bracket is modularly designed, the positioning accuracy of the bracket can be improved.

[0045] Please also see Figure 5 The hanging basket includes a walking system 2, a load-bearing truss assembly 3, a front cross beam 4, a sliding beam 5 and a bottom beam 6.

[0046] Please also see Fig.23 In this embodiment, the traveling system 2 includes a track 21, a traveling trolley 23, a pulley 24 and a traveling jack 25. The track 21 is used to be anchored on the top surface of the bridge; the traveling trolley 23 and the pulley 24 are slidably mounted on the track 21 and spaced apart; the traveling jack 25 is mounted on the track 21 and connected to the pulley 24.

[0047] Please also see Fig.24In this embodiment, the track 21 includes a base 211 and two guide rails 213. The base 211 is anchored to the top surface of the bridge, and the two guide rails 213 are fixed in parallel on opposite sides of the base 211. The guide rail 213 includes a connecting plate 2131, an upper wing plate 2133 and a lower wing plate 2135. The upper wing plate 2133 and the lower wing plate 2135 are respectively connected to the top and bottom of the connecting plate 2131, and the connecting plate 2131 is fixedly connected to the base 211. In this embodiment, a pad 27 is also laid between the base 211 and the bridge. The height of the track 21 is adjusted by the pad 27 to ensure that the track 21 is level. In the prior art, I-beams are usually used as pads. However, in actual working conditions, the flatness of the top surface of the bridge is different. When an I-beam is used as a pad 27, it is often necessary to add pads above or below the I-beam to level the track 21, resulting in low construction efficiency. Please refer to Figures 28 to 30 In this embodiment, the spacer 27 is a wedge-shaped spacer, specifically, it includes a first wedge-shaped block 271, a second wedge-shaped block 273, an adjusting screw 275 and two locking nuts 276. The inclined surface of the first wedge-shaped block 271 is in sliding contact with the inclined surface of the second wedge-shaped block 273; the first wedge-shaped block 271 and the second wedge-shaped block 273 are both slidably sleeved on the adjusting screw 275 through waist-shaped holes; the two locking nuts 276 are both threadedly connected with the adjusting screw 275, and one of the locking nuts 276 is located on the side of the first wedge-shaped block 271 facing away from the second wedge-shaped block 273, and the other locking nut 276 is located on the side of the second wedge-shaped block 273 facing away from the first wedge-shaped block 271. The base 211 and the lower wing plate 2135 are both supported on the top surface of the second wedge-shaped block 273. When in use, the relative position of the first wedge block 271 and the second wedge block 273 can be adjusted by loosening the locking nut 276, thereby achieving the purpose of adjusting the height of the track 21 according to the actual working conditions. Compared with the prior art solution of using I-beam as the pad 27, its construction is more convenient.

[0048] The trolley 23 is slidably mounted on the two guide rails 213, and includes a frame 231 and a plurality of running wheels 233 rotatably mounted on the frame 231. The frame 231 is connected to the load-bearing truss assembly 3; the plurality of running wheels 233 are respectively slidably connected to the two guide rails 213, and each running wheel 233 is respectively in rolling contact with the bottom surface of the upper wing plate 2133 of the corresponding guide rail 213. The rolling contact between the running wheels 233 and the bottom surface of the upper wing plate 2133 can not only guide the movement of the trolley 23, but also prevent the basket from tipping over. It can be understood that the number of running wheels 233 can be set according to actual working conditions.

[0049] Please also see Fig.25 and Fig.26, the pulley 24 is slidably mounted on the two guide rails 213. In this embodiment, the pulley 24 includes a pulley bracket 241 and two slide plates 243 installed at intervals at the bottom of the pulley bracket 241. The pulley bracket 241 is connected to the load-bearing truss assembly 3, and the two slide plates 243 are slidably supported on the upper wing plates 2133 of the two guide rails 213. A limit plate 245 is also fixed on the opposite sides of each slide plate 243, and the two limit plates 245 on each slide plate 243 are respectively located on the opposite sides of the corresponding upper wing plates 2133 to guide the movement of the pulley 24. The traveling jack 25 is installed on the base 211 and connected to the pulley bracket 241 to push the pulley 24 along the length direction of the guide rail 213.

[0050] Please also see Fig. 27 In this embodiment, the traveling system 2 further includes an anti-hook safety device 28. The anti-hook safety device 28 is located between the traveling trolley 23 and the pulley 24. The anti-hook safety device 28 includes a fixing frame 281 and two hooks 282 installed at intervals at the bottom of the fixing frame 281. The fixing frame 281 is connected to the load-bearing truss assembly 3, and the two hooks 282 are slidably hooked on the upper wing plates 2133 of the two guide rails 213. Through the cooperation between the hooks 282 and the upper wing plates 2133, the basket can be further prevented from overturning, thereby improving the safety of production.

[0051] Please also see Figures 6 to 8 The load-bearing truss assembly 3 includes a plurality of load-bearing trusses 31 spaced apart in the transverse direction of the bridge. The front ends of the plurality of load-bearing trusses 31 are connected together by a front transverse connecting rod 32, the rear ends of the plurality of load-bearing trusses 31 are connected together by a rear transverse connecting rod 33, and the middle parts of the plurality of load-bearing trusses 31 are connected by a scissor brace 34. Each load-bearing truss 31 is installed on a walking system 2, and the rear end of each load-bearing truss 31 is also used to be anchored on the top of the bridge.

[0052] Please also see Figure 12-13 The first mounting member 35 includes two first mounting plates 351 arranged opposite to each other, one end of the first straight side bar 3111 extends between the two first mounting plates 351 and is welded to the inner walls of the two first mounting plates 351, and one end of the second straight side bar 3112 is inserted between the two first mounting plates 351 and is welded to the inner walls of the first mounting plates 351. The two first mounting plates 351 are provided with first pin holes 3512 for pins to pass through. When the female triangular truss 311 is applied to the bracket, a pin (not shown) passes through the first pin hole 3512 and the upper ear seat 330 to detachably connect the female triangular truss 311 and the upper ear seat 330.

[0053] Please also see Fig.10 and Fig.11The second mounting member 36 includes two second mounting plates 361 and a mounting cover plate 364. Each second mounting plate 361 includes a fixing portion 362 and a limiting portion 363 connected to the fixing portion 362. The end of the first straight side bar 3111 away from the first mounting member 35 is inserted between the fixing portions 362 of the two second mounting plates 361 and welded to the fixing portions 362 of the two second mounting plates 361; one end of the hypotenuse bar 3113 is inserted between the fixing portions 362 of the two second mounting plates 361 and welded to the fixing portions 362 of the two second mounting plates 361. The limiting portion 363 is located at the end of the hypotenuse bar 3113 facing away from the third mounting member 37 to form a limiting protrusion 700. The limiting portions 363 of the two second mounting plates 361 are correspondingly provided with mounting pin holes 365 for pin shaft insertion. A reinforcing plate (not shown) is also provided between the two second mounting plates 361 to further improve the strength of the triangular truss 400. The mounting cover plate 364 is fixed to a side of the two limiting portions 363 facing away from the hypotenuse rod 3113 .

[0054] Please also see Figure 14-15 The third mounting member 37 includes two third mounting plates 372 arranged opposite to each other; one end of the second straight side bar 3112 away from the first mounting member 35 extends between the two third mounting plates 372 and is welded to the inner walls of the two third mounting plates 372; one end of the hypotenuse bar 3113 away from the second mounting member 36 extends between the two third mounting plates 372 and is welded to the inner walls of the two third mounting plates 372 and the second straight side bar 3112; a socket 371 is formed between the two third mounting plates 372, and the socket 371 is located at the end of the second straight side bar 3112 facing away from the first mounting member 35. The two third mounting plates 372 are provided with mounting pin holes 374 correspondingly, and the mounting pin holes 374 are connected to the socket 371. When the female triangular truss 311 is applied to the bracket, a pin (not shown) passes through the mounting pin hole 374 and the lower ear seat 310 to detachably connect the female triangular truss 311 and the lower ear seat 310 together.

[0055] Please also see Fig.16 , Figure 19-20 The first connecting member 38 includes two first side plates 381 arranged opposite to each other; a first right-angle rod 3121 extends between the two first side plates 381 and is welded to the inner walls of the two first side plates 381; one end of the second right-angle rod 3123 is inserted between the two first side plates 381 and is welded to the inner walls of the first side plates 381 and the first right-angle rod 3121. The two first side plates 381 are provided with corresponding second pin holes 3811 for the insertion of the pin, and the second pin hole 3811 is located at one end of the first right-angle rod 3121 facing away from the second connecting member 39. When the male head triangular truss 312 is applied to the bracket, a pin shaft (not shown) passes through the second pin hole 3811 and the upper ear seat 330 to detachably connect the male head triangular truss 312 and the upper ear seat 330.

[0056] Please also see Fig.17 and Fig.18 The second connecting member 39 includes two second side plates 391 arranged opposite to each other and a connecting cover plate 394. The structure of the second side plate 391 is the same as that of the second mounting plate 361, and both include a fixing portion 362 and a limiting portion 363 connected to the fixing portion 362. The end of the first right-angle rod 3121 away from the first connecting member 38 is inserted between the fixing portions 362 of the two second side plates 391 and welded to the two fixing portions 362. One end of the oblique rod 3124 is inserted between the fixing portions 362 of the two second side plates 391 and welded to the two fixing portions 362 and the first right-angle rod 3121; the connecting cover plate 394 is fixed to the side of the two limiting portions 363 facing away from the oblique rod 3124, and is used for anchoring with the bridge. The limiting portion 363 of the second connecting member 39 is detachably connected to the frame 231 of the traveling trolley 23 through a pin 395, and is detachably connected to the fixing frame 281 of the anti-hook safety device 28 through a pin 396.

[0057] Please also see Fig.21 and Fig. 22 The third connecting member 30 includes two third side plates 301 arranged opposite to each other, the second right-angle rod 3123 passes through the space surrounded by the two third side plates 301 and is welded to the inner walls of the two third side plates 301, and the oblique rod 3124 passes through the space surrounded by the two third side plates 301 and is welded to the inner walls of the two third side plates 301. One end of the second right-angle rod 3123 away from the first connecting member 38 and one end of the oblique rod 3124 away from the second connecting member 39 are welded and both extend out of the third connecting member 30 to form the plug-in portion 3125, and a plug pin hole 3126 is formed through the plug-in portion 3125. The plug-in portion 3125 is plugged into the socket 371 and connected to the female triangular truss 311 via the pin shaft 303. Specifically, the pin shaft 303 passes through the plug-in pin hole 3126 of the plug-in portion 3125 and the mounting pin hole 374 on the third mounting member 37 to detachably connect the male triangular truss 312 and the female triangular truss 311 together.

[0058] The load-bearing truss 31 and the pulley 24 are detachably connected via the pins 306 and 303. Specifically, the two third side panels 301 and the oblique rod 3124 are correspondingly provided with fixing pin holes 305, and the pins 306 are inserted into the fixing pin holes 305; the pins 306 pass through the pulley bracket 241 and the fixing pin holes 305, and the pins 303 pass through the plug-in pin holes 3126 of the plug-in portion 3125, the mounting pin holes 374 on the third mounting member 37 and the pulley bracket 241, so as to detachably connect the load-bearing truss 31 and the pulley 24 together.

[0059] The first straight side bar 3111, the second straight side bar 3112, the oblique side bar 3113, the first mounting member 35, the second mounting member 36 and the third mounting member 37 are connected as a whole by welding to form a modular structure. The first right angle bar 3121, the second right angle bar 3123, the oblique bar 3124, the first connecting member 38, the second connecting member 39 and the third connecting member 30 are connected as a whole by welding to form a modular structure.

[0060] In this embodiment, the female triangular truss 311 further includes a first reinforcing rod 3115 and a second reinforcing rod 3117. The first reinforcing rod 3115 and the second reinforcing rod 3117 are both arranged in a space surrounded by the first straight side rod 3111, the second straight side rod 3112 and the hypotenuse rod 3113. The opposite ends of the first reinforcing rod 3115 are respectively welded to the first straight side rod 3111 and the hypotenuse rod 3113. The second reinforcing rod 3117 is perpendicular to the first reinforcing rod 3115. The opposite ends of the second reinforcing rod 3117 are respectively welded to the hypotenuse rod 3113 and the second straight side rod 3112. The arrangement of the first reinforcing rod 3115 and the second reinforcing rod 3117 can improve the strength of the female triangular truss 311. The male head triangular truss 312 also includes a first stiffening rod 3127 and a second stiffening rod 3128. The first stiffening rod 3127 and the second stiffening rod 3128 are both arranged in a space surrounded by the first right-angle rod 3121, the second right-angle rod 3123 and the oblique rod 3124. The opposite ends of the first stiffening rod 3127 are respectively welded to the first right-angle rod 3121 and the oblique rod 3124. The second stiffening rod 3128 is perpendicular to the first stiffening rod 3127. The opposite ends of the second stiffening rod 3128 are respectively welded to the oblique rod 3124 and the second right-angle rod 3123. The arrangement of the first stiffening rod 3127 and the second stiffening rod 3128 can improve the strength of the male head triangular truss 312.

[0061] One end of the main truss rod 313 is detachably connected to the first mounting member 35 of the female triangular truss 311 through a pin shaft 71, and the other end of the main truss rod 313 is detachably connected to the first connecting member 38 of the male triangular truss 312 through a pin shaft 73. Specifically, one end of the main truss rod 313 extends between the two first mounting plates 351, and the pin shaft 71 passes through the first pin hole 3512 and the main truss rod 313 to connect one end of the main truss rod 313 to the first mounting member 35; one end of the main truss rod 313 away from the first mounting member 35 extends between the two first side plates 381, and the pin shaft 73 passes through the second pin hole 3811 and the main truss rod 313 to connect the main truss rod 313 to the first connecting member 38. The front transverse connecting rod 32 connects the hypotenuse rods 3113 of several load-bearing trusses 31; the load-bearing truss assembly 3 includes two groups of scissor braces 34, one group of scissor braces 34 is installed on the second straight side rod 3112 of the female triangular truss 311, and the other group of scissor braces 34 is installed on the main truss tie rod 313; the rear transverse connecting rod 33 connects the first right-angle rod 3121 of several load-bearing trusses 31. In this embodiment, the front transverse connecting rod 32 is detachably connected to the hypotenuse rod 3113 by bolts, one group of scissor braces 34 is detachably connected to the second straight side rod 3112 by bolts, the other group of scissor braces 34 is detachably connected to the main truss tie rod 313 by bolts, and the rear transverse connecting rod 33 is detachably connected to the first right-angle rod 3121 by bolts. The detachable connection is achieved by bolts, so that the female triangular truss 311 and the male triangular truss 312 can be removed from the load-bearing truss 31, so as to facilitate subsequent turnover.

[0062] Please see again Figures 5 to 7 The front cross beam 4 is parallel to the arrangement direction of the plurality of load-bearing trusses 31 and is connected to the front end of the load-bearing trusses 31 through the sling 42. In this embodiment, the front cross beam 4 is suspended from the mounting pin hole 365 ( Fig.10 ) on the bridge. The sling 42 is a steel section, one end of which is pinned to the mounting pin hole 365 through a sling pin (not shown), and the other end is fixed to the front crossbeam 4. The sliding beam 5 is parallel to the longitudinal direction of the bridge and is slidably connected to the bridge. Specifically, the sliding beam 5 is slidably connected to the bridge through a sliding beam connector 8. The sliding beam connector 8 includes a connecting frame 82, which is suspended on the bridge through threaded steel, and the sliding beam 5 slides through the connecting frame 82. In this embodiment, the sliding beam 5 is also connected to the bridge through a sliding beam roller assembly 9. Please refer to Fig.31 and Fig.32The sliding beam roller assembly 9 includes a roller bracket 91 and a roller 93 mounted on the roller bracket 91. The roller bracket 91 is suspended on the bridge through threaded steel. The sliding beam 5 slides through the roller bracket 91 and rolls with the roller 93. The sliding beam connector 8 can provide support for the sliding beam 5, and the sliding beam roller assembly 9 can make the sliding beam 5 move more smoothly. The sliding beam 5 is divided into an outer sliding beam and an inner sliding beam, wherein the outer sliding beam is a sliding beam located outside the bridge, and the inner sliding beam 5 is a sliding beam located inside the bridge hole.

[0063] The bottom beam 6 is located on the side of the sliding beam 5 facing away from the front cross beam 4. The front end of the bottom beam 6 is suspended on the front cross beam 4 through the front suspension rod 61. In this embodiment, one end of the front suspension rod 61 is pin-connected to the front cross beam 4, and the front end of the bottom beam 6 is pin-connected to the free end of the front suspension rod 61. The rear end of the bottom beam 6 is suspended on the outer sliding beam 5 through the rear suspension rod 63. Specifically, in this embodiment, the rear end of the bottom beam 6 is suspended on the outer sliding beam 5 through the shoulder pole beam 10. The shoulder pole beam 10 is perpendicular to the outer sliding beam 5, and the opposite ends of the shoulder pole beam 10 are respectively suspended on two outer sliding beams 5. One end of the rear suspension rod 63 is pin-connected to the rear end of the bottom beam 6, and the other end of the rear suspension rod 63 is suspended on the shoulder pole beam 10. The rear end of the bottom beam 6 is also connected to the bridge through the suspension rod 65. In this embodiment, one end of the suspension rod 65 is anchored to the bridge, and the other end of the suspension rod 65 is pin-connected to the rear end of the bottom beam 6. In this embodiment, the front suspension rod 61, the rear suspension rod 63 and the suspension rod 65 are all threaded steel bars.

[0064] The above-mentioned hanging basket has the front ends of several load-bearing trusses 31 arranged along the transverse direction of the bridge connected together by front transverse connecting rods 32, the rear ends of several load-bearing trusses 31 connected together by rear transverse connecting rods 33, and the middle parts of several load-bearing trusses 31 connected by scissor braces 34, which strengthens the overall stability of the hanging basket in the transverse direction of the bridge and the longitudinal direction of the bridge, and is suitable for cantilever casting construction of extra-large bridges. The above-mentioned hanging basket, each load-bearing truss 31 includes a female triangular truss 311, a male triangular truss 312, and a main truss tie rod 313 connecting the female triangular truss 311 and the male triangular truss 312, wherein the female triangular truss 311 and the male triangular truss 312 are both designed with modular structures, with high installation and removal efficiency, and the stability of the hanging basket is further improved through modular design. Furthermore, since the female triangular truss 311 and the male triangular truss 312 are modularly designed as a whole according to the triangular truss structure, and the female triangular truss 311, the male triangular truss 312 and the main truss tie rod 313 are also connected to form a triangular truss structure, the bending resistance of the load-bearing truss 31 can be improved, and the stability is higher. Each modular structure is connected by a pin connection, which can release the additional bending moment of the node, solving the problem of stress concentration between structural nodes caused by the heavy weight of the segment in the extra-large bridge. By replacing the main truss tie rod 313 of different lengths, the hanging basket can be applied to continuous rigid frame bridges of different spans, different weights, and different widths, and has strong applicability. The front end of the bottom beam 6 is pinned to one end of the front suspension rod 61, the other end of the front suspension rod 61 is pinned to the front cross beam 4, the front cross beam 4 is pinned to the front end of the load-bearing truss 31 through the sling 42, and the rear end of the bottom beam 6 is pinned to the rear suspension rod 63, so that the front suspension rod 61 and the sling 42 can be adaptively adjusted according to the force of the bottom beam 6, ensuring that the front suspension rod 61 and the sling 42 are vertical, thereby improving the safety of production and reducing safety hazards. At the same time, the rear end of the bottom beam 6 is connected to the outer sliding beam 5 through the shoulder pole beam 10, and the opposite ends of the shoulder pole beam 10 are respectively suspended on the two outer sliding beams 5, so that the force can be balanced through the shoulder pole beam 10, thereby improving the safety of production.

[0065] It is understood that the front cross beam 4 can also be anchored to the front end of the load-bearing truss 31, the front end of the bottom beam 6 can be fixedly connected to the front suspension rod 61, and the rear end of the bottom beam 6 can be fixedly connected to the rear suspension rod 63. It is understood that the walking system 2 can also adopt the structure of other walking systems of the hanging basket in the prior art. It is understood that the construction method can also include other steps, which belong to the prior art and are not repeated here for the sake of space omission.

[0066] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A No. 0 block bracket for the construction of a main beam of a hollow thin-walled pier continuous rigid frame bridge, characterized in that: include A lower embedded plate (110), the lower embedded plate (110) extending in the longitudinal direction of the bridge and horizontally embedded in the hollow thin-walled pier, with opposite ends of the lower embedded plate (110) respectively welded to a lower ear seat (310); an upper embedded plate (130), the upper embedded plate (130) being located above the lower embedded plate (110), the upper embedded plate (130) extending in the longitudinal direction of the bridge and being horizontally embedded in the hollow thin-walled pier, with opposite ends of the upper embedded plate (130) respectively abutting against an upper ear seat (330); A tension screw rod (200), the tension screw rod (200) being located above the lower embedded plate (110), the tension screw rod (200) extending in the longitudinal direction of the bridge and horizontally passing through a hollow thin-walled pier, the opposite ends of the tension screw rod (200) both extending out of the hollow thin-walled pier and respectively being detachably connected to one of the upper ear seats (330) via a nut; A triangular truss (400), the triangular truss (400) being located outside the hollow thin-walled pier, each triangular truss (400) being arranged vertically and connected to a lower ear seat (310) and an upper ear seat (330) located directly above the lower ear seat (310); A Bailey frame (500), wherein the Bailey frame (500) is mounted on the triangular truss (400); An external distribution beam (610), the external distribution beam (610) being mounted on the Bailey frame (500); and An inner cavity distribution beam (630), the inner cavity distribution beam (630) being mounted on the upper embedded plate (130); The lower embedded plate (110) and the upper embedded plate (130) are both made of steel sections; there are a plurality of tensioning screw rods (200), and the plurality of tensioning screw rods (200) are respectively arranged on opposite sides of the upper embedded plate (130); The No. 0 block bracket also includes a plurality of flange plate support frames (910) and support beams (930). The plurality of flange plate support frames (910) are respectively installed on opposite sides of the hollow thin-walled pier along the transverse bridge, and the support beams (930) are mounted on the flange plate support frames (910).

2. The No. 0 block bracket according to claim 1, characterized in that: A limiting protrusion (700) is also formed on a side of the triangular truss (400) away from the upper ear seat (330).

3. The No. 0 block bracket according to claim 1, characterized in that: The triangular truss (400), the upper ear seat (330) and the lower ear seat (310) are all detachably connected via a pin.

4. The No. 0 block bracket according to claim 1, characterized in that: Two adjacent triangular trusses (400) are also connected together via a connecting rod (800), and opposite ends of each connecting rod (800) are detachably connected to the triangular trusses (400) via bolts.

5. The No. 0 block bracket according to claim 1, characterized in that: The triangular truss (400) comprises a plurality of female triangular trusses (311) and a plurality of male triangular trusses (312). The female triangular truss (311) comprises a first straight side bar (3111), a second straight side bar (3112) and a hypotenuse bar (3113); one end of the first straight side bar (3111) and one end of the second straight side bar (3112) are both welded to a first mounting member (35); the first straight side bar (3111) and the second straight side bar (3112) are vertically welded; the first mounting member (35) and the upper ear seat (330) are detachably connected via a pin. The other end of the first straight-side rod (3111) is welded to one end of the hypotenuse rod (3113) and both are welded to a second mounting member (36); the other end of the second straight-side rod (3112) is welded to the other end of the hypotenuse rod (3113) and both are welded to a third mounting member (37), wherein a socket (371) is provided in the third mounting member (37), and the third mounting member (37) is detachably connected to the lower ear seat (310) via a pin shaft; The male head triangular truss (312) comprises a first right-angle rod (3121), a second right-angle rod (3123) and an oblique rod (3124); one end of the first right-angle rod (3121) and one end of the second right-angle rod (3123) are both welded to a first connecting piece (38); the first right-angle rod (3121) and the second right-angle rod (3123) are vertically welded; the first connecting piece (38) and the upper ear seat (330) are detachably connected via a pin; the other end of the first right-angle rod (3121) and one end of the oblique rod (3124) are welded to a first connecting piece (38); the first right-angle rod (3121) and the second right-angle rod (3123) are vertically welded; the first connecting piece (38) and the upper ear seat (330) are detachably connected via a pin; The ends of the second right-angle rod (3123) and the second ear seat (310) are welded and both are welded to a second connecting member (39); the other end of the second right-angle rod (3123) and the other end of the oblique rod (3124) are welded to a third connecting member (30), and one end of the second right-angle rod (3123) away from the first connecting member (38) and one end of the oblique rod (3124) away from the second connecting member (39) are welded and both extend out of the third connecting member (30) to form a plug-in portion (3125), and the plug-in portion (3125) is detachably connected to the lower ear seat (310) via a pin.

6. A method for constructing a main beam of a hollow thin-walled pier continuous rigid frame bridge, characterized in that: The following steps are involved: S1: Building a No. 0 block bracket on the hollow thin-walled pier to carry out the construction of No. 0 block, including the following steps: Installation of the lower embedded plate (110): the lower embedded plate (110) is embedded during the construction of the hollow thin-walled pier, the lower embedded plate (110) extending in the longitudinal direction of the bridge and horizontally embedded in the hollow thin-walled pier, so that opposite ends of the lower embedded plate (110) are respectively welded to a lower ear seat (310); Installation of the upper embedded plate (130): the upper embedded plate (130) is embedded during the construction of the hollow thin-walled pier, the upper embedded plate (130) is located above the lower embedded plate (110), the upper embedded plate (130) extends in the longitudinal direction of the bridge and is horizontally embedded in the hollow thin-walled pier, and opposite ends of the upper embedded plate (130) correspond to an upper ear seat (330) respectively; Installation of the tension screw (200): the tension screw (200) is located above the lower embedded plate (110), the tension screw (200) extends in the longitudinal direction of the bridge and horizontally penetrates the hollow thin-walled pier, the opposite ends of the tension screw (200) extend out of the hollow thin-walled pier and are respectively detachably connected to one of the upper ear seats (330) via a nut, and the nut is tightened to make the upper ear seat (330) butt against the upper embedded plate (130); Installation of the triangular truss (400): the triangular truss (400) is located outside the hollow thin-walled pier, each triangular truss (400) is vertically arranged and connected to a lower ear seat (310) and an upper ear seat (330) located directly above the lower ear seat (310); Installation of the Bailey frame (500): the Bailey frame (500) is installed on the triangular truss (400); Installation of the external distribution beam (610): the external distribution beam (610) is mounted on the Bailey frame (500); Installation of the inner cavity distribution beam (630): the inner cavity distribution beam (630) is mounted on the upper embedded plate (130); Formwork installation: Install the formwork on the outer distribution beam (610) and the inner cavity distribution beam (630), and pour concrete on the formwork to form block 0; S2: Remove the bracket of block 0, build a hanging basket, and use the hanging basket cantilever casting construction method to cast the main beam at the opposite ends of block 0 along the longitudinal direction of the bridge.

7. The construction method of the main beam of a hollow thin-walled pier continuous rigid frame bridge as claimed in claim 6, characterized in that: The triangular truss (400) is detachably connected to the lower ear seat (310) and the upper ear seat (330) via a pin shaft, and the Bailey frame (500) is detachably mounted on the triangular truss (400). The removal of the No. 0 block bracket comprises the following steps: after removing the template on the external distribution beam (610), the external distribution beam (610) and the Bailey frame (500) from the triangular truss (400), pulling out the pin shaft connecting the upper ear seat (330) and the triangular truss (400) and the pin shaft connecting the lower ear seat (310) and the triangular truss (400), removing the triangular truss (400) from the upper ear seat (330) and the lower ear seat (310), unscrewing the nut, removing the upper ear seat (330) from the tension screw rod (200), and then pulling the tension screw rod (200) out of the hollow thin-walled pier.

8. The method for constructing a main beam of a hollow thin-walled pier continuous rigid frame bridge as claimed in claim 7, characterized in that: The triangular truss (400) comprises a plurality of female triangular trusses (311) and a plurality of male triangular trusses (312). The female triangular truss (311) comprises a first straight side bar (3111), a second straight side bar (3112) and a hypotenuse bar (3113); one end of the first straight side bar (3111) and one end of the second straight side bar (3112) are both welded to a first mounting member (35); the first straight side bar (3111) and the second straight side bar (3112) are vertically welded; the first mounting member (35) and the upper ear seat (330) are detachably connected via a pin. The other end of the first straight-side rod (3111) is welded to one end of the hypotenuse rod (3113) and both are welded to a second mounting member (36); the other end of the second straight-side rod (3112) is welded to the other end of the hypotenuse rod (3113) and both are welded to a third mounting member (37), wherein a socket (371) is provided in the third mounting member (37), and the third mounting member (37) is detachably connected to the lower ear seat (310) via a pin shaft; The male head triangular truss (312) comprises a first right-angle rod (3121), a second right-angle rod (3123) and an oblique rod (3124); one end of the first right-angle rod (3121) and one end of the second right-angle rod (3123) are both welded to a first connecting piece (38); the first right-angle rod (3121) and the second right-angle rod (3123) are vertically welded; the first connecting piece (38) and the upper ear seat (330) are detachably connected via a pin; the other end of the first right-angle rod (3121) and one end of the oblique rod (3124) are welded to a first connecting piece (38); the first right-angle rod (3121) and the second right-angle rod (3123) are vertically welded; the first connecting piece (38) and the upper ear seat (330) are detachably connected via a pin; The ends of the second right-angle rod (3123) and the second ear seat (310) are welded and both are welded to a second connecting member (39); the other end of the second right-angle rod (3123) and the other end of the oblique rod (3124) are welded to a third connecting member (30), and one end of the second right-angle rod (3123) away from the first connecting member (38) and one end of the oblique rod (3124) away from the second connecting member (39) are welded and both extend out of the third connecting member (30) to form a plug-in portion (3125), and the plug-in portion (3125) is detachably connected to the lower ear seat (310) via a pin shaft; When the hanging basket is constructed, the plug-in portion (3125) of a male triangular truss (312) is plugged into the socket (371) of a female triangular truss (311), and the plug-in portion (3125) is connected to the third mounting member (37) of the female triangular truss (311) via a latch; a main truss tie rod (313) is provided, and the opposite ends of the main truss tie rod (313) are detachably connected to the first mounting member (35) of the female triangular truss (311) and the first connecting member (38) of the male triangular truss (312) via a pin, thereby forming a load-bearing truss (31) of the hanging basket.

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