Triangular steel arch formwork system and construction method for cast-in-place concrete main arch ring

Abstract

The present invention relates to a cast-in-place concrete main arch ring triangular steel arch frame formwork system, comprising: an arch foot anchoring system, an arch foot fixed steel frame, a hanging basket suspended casting system, an adjustable arch frame for the main arch ring, and a cast-in-place support system; comprising the following steps: pier body construction, double-column foundation and short-column foundation construction, cast-in-place support system erection, arch foot anchoring system construction, arch foot fixed steel frame construction, arch ring adjustable arch frame construction, hanging basket installation, water tank pre-stressing system construction, and main arch ring concrete pouring. The beneficial effects of the present invention are: one end of the steel arch frame is supported by the arch foot anchoring system; the other end of the steel arch frame is supported by the arch foot fixed steel frame; the hanging basket suspended casting system can perform sliding support of the steel arch frame, greatly improving the construction efficiency of the concrete arch ring pouring of the formwork; the adjustable steel arch frame for the main arch ring can be applied to the construction of the arch axis within a certain range; the bottom of the cast-in-place full-floor support is supported by Bailey beams and short columns.

Description

Technical Field

[0001] The invention relates to a triangular steel arch frame formwork system for a cast-in-situ concrete main arch ring and a construction method, and is mainly suitable for cast-in-situ construction of a concrete main arch ring. Background Art

[0002] Among all types of bridges, arch bridges are the most common structural form and construction method. Each construction method has its own unique construction control features. Generally speaking, arch bridge construction control is divided into two stages: the formation of the main arch ring and the formation of the superstructure. The formation of the main arch ring is the key to the entire bridge construction.

[0003] The construction process for the arch foot is complex, and the positioning of the first arch ring is extremely difficult. Traditional construction methods require a significant amount of time to position the arch foot alone. Furthermore, after the first triangular arch frame is installed, the remaining triangular steel arch frames require constant positioning of the arch axis, significantly reducing construction efficiency.

[0004] The traditional hanging basket suspended casting construction method generally installs embedded parts in the starting section of the main arch ring, and then uses the embedded parts to support the hanging basket along the arch axis. This construction method requires the disassembly and installation of the hanging basket section by section, which will take a lot of time on the disassembly and installation of the hanging basket, thereby delaying the construction period.

[0005] The currently commonly used adjustable steel arch frame can adjust the arch frame line shape through the adjustable joint of the upper chord. The arch frame has a good line shape, does not require the erection of steel pipe supports, and has a small construction load. In addition, the adjustable arch frame has large lateral stiffness, good stability, and good construction safety performance. However, its construction method is relatively complicated, and any link is critical, so the construction quality is difficult to control.

[0006] Furthermore, in certain situations, the convenient prefabrication process is not suitable. For example, if the construction access road is not conducive to the transportation of large components, the assembly site does not have the working conditions of a large crane, or it is not economical, then cast-in-place construction of the main arch ring should be considered. However, due to the complex structure of the arch frame, the efficiency of the existing cast-in-place system for the main arch ring support is low and needs to be optimized.

[0007] In response to the above problems, based on the summary of traditional construction methods, it is urgent to propose a new triangular steel arch frame formwork system and construction method for cast-in-place concrete main arch ring according to the existing triangular steel arch frame formwork system and construction method, so as to improve the construction quality and efficiency of cast-in-place construction of concrete main arch ring. Summary of the Invention

[0008] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a triangular steel arch formwork system for a cast-in-situ concrete main arch ring and a construction method.

[0009] This cast-in-place concrete main arch ring triangular steel arch frame formwork system includes: arch foot anchoring system, arch foot fixed steel frame, hanging basket suspended pouring system, main arch ring adjustable arch frame and cast-in-place support system;

[0010] The arch foot anchoring system and the arch foot fixed steel frame respectively support one end of the steel arch frame. The arch foot anchoring system includes a load-bearing I-beam and a left supporting truss. A transverse elevation adjustment block, an adjustment jack, and a longitudinal elevation adjustment block are provided between the load-bearing I-beam and the pier body. The load-bearing I-beam is provided with a steel arch frame hinge seat and a right supporting truss, and the left supporting truss is placed on the pier body. The arch foot fixed steel frame includes a steel support frame load-bearing beam and a steel support frame column. The steel support frame column is provided with a support frame column upper jack and a support frame column lower jack. The steel support frame load-bearing beam is provided with a steel arch frame hinge seat and an auxiliary support frame.

[0011] The main arch ring hanging basket suspended casting system includes a steel arch frame, the top surface of the steel arch frame is provided with a concrete arch ring bottom formwork, one side of the steel arch frame is slidably connected to the hanging basket system, and the hanging basket system is connected to the concrete arch ring side formwork through the end plate connecting rod; the main arch ring adjustable arch frame includes a prefabricated base, the prefabricated base is set on the pier body through the prefabricated base elevation adjustment jack and sand box, and the prefabricated base is slidably connected to the steel arch frame; the steel arch frame is provided with a water tank, an upper curvature adjustment rod and a lower curvature adjustment rod; the cast-in-place support system includes support steel pipe columns and short columns, the support steel pipe columns are provided with Bailey beams, and the Bailey beams and short columns are provided with concrete arch rings through cast-in-place full-span supports.

[0012] As a preferred embodiment: the arch foot anchoring system is arranged on the pier body, and the bottom of the left supporting truss is connected to the pier body through the pier body truss anchor plate; the arch foot anchoring system also includes a spirit level and a load-bearing I-beam stiffening plate, an I-beam crossbeam is arranged between the load-bearing I-beams, and the ends of the I-beam crossbeam are connected to the pier body through the pier body anchor plate; a spirit level is provided on the load-bearing I-beam, and the longitudinal elevation adjustment block and the transverse elevation adjustment block are respectively fixed with adjustment screws; a hinge limit plate is provided on the steel arch frame hinge seat, and a steel arch frame is arranged on the steel arch frame hinge seat.

[0013] As a preferred embodiment: in the arch foot fixed steel frame, a steel support frame column is provided at the bottom of the steel support frame load-bearing beam, a support frame column upper jack is provided at the top of the steel support frame column, a stiffening tube base and a support frame column lower jack are provided at the bottom of the steel support frame column; a level gauge is provided on the top surface of the steel support frame load-bearing beam; a steel arch frame hinge seat and an auxiliary support frame are also provided on the top surface of the steel support frame load-bearing beam, and distribution beams are respectively provided at the bottom of the steel arch frame hinge seat and the auxiliary support frame; steel arch frame hinge seat limit plates are provided on both sides of the steel arch frame hinge seat, and a hinge seat limit plate is provided on the steel arch frame hinge seat, and the steel arch frame hinge seat and the auxiliary support frame respectively support the steel arch frame; the auxiliary support frame top plate is provided with a wedge-shaped top block through a slide groove, and an auxiliary support frame fixing bolt is provided between the auxiliary support frame top plate and the wedge-shaped top block, and wedge-shaped top block grooved ear plates are provided on both sides of the wedge-shaped top block; a transverse fixed channel steel is provided between the steel support frame column and the pier body.

[0014] Preferably: the main arch ring hanging basket suspended casting system also includes a formwork fixed end plate; one side of the upper cross bar of the steel arch frame is provided with a hanging basket upper slide rail, and one side of the lower cross bar of the steel arch frame is provided with a hanging basket lower rail, and the hanging basket system is slidably connected to the hanging basket upper slide rail and the hanging basket lower slide rail through the hanging basket upper channel steel slider and the hanging basket lower channel steel slider; one side of the formwork fixed end plate is provided with an end plate connecting rod, the bottom of the end plate connecting rod is connected to the hanging basket system, the other side of the formwork fixed end plate is provided with a concrete arch ring side formwork, and the top surface of the steel arch frame is provided with a concrete arch ring bottom formwork; the top surface of the hanging basket upper channel steel is paved with a hanging basket bottom plate, the end of the hanging basket upper channel steel is provided with a guardrail column positioning cylinder, the guardrail column positioning cylinder is provided with a guardrail column, and a protective net is provided between the guardrail columns; a bottom formwork back rib is provided between the concrete arch ring bottom formwork and the steel arch frame.

[0015] As a preferred embodiment: in the main arch ring adjustable arch frame, the top surface of the pier body is provided with a sandbox base, the sandbox base is provided with a sandbox and a prefabricated base elevation adjustment jack, and the sandbox is provided with a sand discharge pipe; the prefabricated base is arranged along the river bank line, the prefabricated base is provided on the prefabricated base elevation adjustment jack, and the bottom surface of the prefabricated base is also provided with a shelf I-steel, and the shelf I-steel is placed in the sandbox; the top surface of the prefabricated base is provided with an embedded I-steel, and the embedded I-steel is slidably connected to a sliding bottom plate, and the top surface of the sliding bottom plate is provided with a steel arch frame hinge seat, and the steel arch frame hinge seat supports the steel arch frame; the steel arch frame is supported by a water tank bracket The system is provided with a water tank; the water tank support system includes a water tank support column, the water tank support column is provided with a column height adjustment sleeve, the support cross bar of the water tank support system is provided with a cross bar length adjustment sleeve, the top surface of the water tank column is provided with a column cover plate, the column cover plate is provided with a column top distribution beam, the column top distribution beam is provided with a distribution beam pad, the distribution beam pad is provided with a water tank placement bottom plate, the water tank is provided on the water tank placement bottom plate, the water tank is provided on the water tank side wall The outside of the water tank is provided with a water tank back rib, the outside of the water tank is provided with a water tank guardrail, and the water tank limit reinforcement plate is provided on the water tank placement bottom plate at the bottom of the water tank.

[0016] As a preferred embodiment: the cast-in-place support system also includes a double-column foundation and a short column foundation, a Bailey beam adjustment jack is provided between the support steel pipe column and the Bailey beam, and an elevation adjustment triangular pad is provided between the support steel pipe column and the Bailey beam; a flange is provided at the bottom of the support steel pipe column, and the flange is provided with a support steel pipe column thickening ring and a flange stiffening plate, and a double-column foundation embedded bottom plate is provided at the bottom of the support steel pipe column thickening ring, and embedded angle steel and embedded steel frame are provided under the double-column foundation embedded bottom plate; an upper flange is provided at the top of the support steel pipe column, and several Bailey beam adjustment jacks are symmetrically provided on the upper flange, and the top surface of the Bailey beam adjustment jack is provided with a Bailey beam placement bottom plate, and the Bailey beam A Bailey beam and a spirit level are provided on the upper part of the placement base plate, and an elevation adjustment triangular pad is provided between the bracket steel pipe column and the Bailey beam placement base plate. A triangular pad fixing bolt is provided at the end of the Bailey beam placement base plate. When the Bailey beam placement base plate is adjusted to be horizontal, several elevation adjustment triangular pads are fixed by the triangular pad fixing bolts; a short column end plate is provided on the top surface of the short column, and a built-in steel reinforcement beam is provided on the top surface of the short column end plate, and a short column upper end plate is provided on the periphery of the built-in steel reinforcement beam. The short column end plate is groove-shaped, and the short column end plate and the short column upper end plate are fixed by upper and lower end plate connecting bolts. Sleepers are provided on the short column upper end plate, and the cast-in-place full-floor bracket is provided on the sleepers.

[0017] The construction method of the cast-in-place concrete main arch ring triangular steel arch frame formwork system comprises the following steps:

[0018] Step 1: Erection of cast-in-place support system: construct the pier body, install short columns and support steel pipe columns, install Bailey beams on the support steel pipe columns, install cast-in-place full-span supports and then pour the concrete arch ring;

[0019] Step 2: Construction of the arch foot anchoring system: Install the left supporting truss on the pier body, install the load-bearing I-beam by installing the longitudinal elevation adjustment block, the transverse elevation adjustment block and the adjustment jack, install the steel arch frame hinge seat and the right supporting truss to support one end of the steel arch frame;

[0020] Step 3: Construction of the arch foot fixed steel frame: Install the steel support frame and adjust the verticality through the jack under the steel support frame column. Install the jack on the support frame column to adjust the horizontality of the steel support frame load-bearing beam. Install the steel arch frame hinge seat and auxiliary support frame to support the other end of the steel arch frame.

[0021] Step 4: Installation of hanging basket suspended pouring system: Slide the hanging basket on one side of the steel arch frame, and then install the concrete arch ring bottom formwork and arch ring side formwork;

[0022] Step 5: Construction of water tank pre-compression system: Install the water tank support system on the steel arch frame, adjust the vertical pole height adjustment sleeve and the horizontal pole length adjustment sleeve and install the water tank;

[0023] Step 6: Main arch ring concrete pouring: After the above steps are completed, the main arch ring concrete pouring is carried out.

[0024] Preferably, in step one: construct a double-column foundation and a short-column foundation in sequence on the river bank, install the short column on the short-column foundation, and install the bracket steel pipe column thickening ring and flange on the embedded bottom plate of the double-column foundation, weld the flange stiffening plate on the flange, and finally install the bracket steel pipe column on the flange; a reinforced truss system is provided between the bracket steel pipe columns on the two double-column foundations; install the short column end plate on the top surface of the short column, and install the built-in steel reinforcement beam on the short column end plate, then install the short column upper end plate, and fix it with the upper and lower end plate connecting bolts, then install the sleepers on the short column upper end plate, and then install the cast-in-place full-floor bracket on the upper part of the short column; install the Bailey beam adjustment jack on the upper flange on the upper part of the bracket steel pipe column, adjust the number of triangular pads according to the design requirements and the level setting elevation of the spirit level, and fix it with the triangular pad fixing bolts, then install the Bailey beam on the Bailey beam placement bottom plate, finally install the remaining cast-in-place full-floor brackets, and cast the concrete arch ring.

[0025] Preferably, in step two: install the left supporting truss on the pier body, and install the longitudinal elevation adjustment block, the transverse elevation adjustment block and the adjusting jack on the pier body, then install the load-bearing I-beam on the longitudinal elevation adjustment block, the transverse elevation adjustment block and the adjusting jack, weld the I-beam crossbeam between the two load-bearing I-beams, and simultaneously construct the load-bearing I-beam stiffening plate, install the spirit level and the steel arch frame hinge with a hinge seat limit plate on the load-bearing I-beam, and install the right supporting truss on the side of the load-bearing I-beam away from the left supporting truss, adjust the horizontal position of the load-bearing I-beam by adjusting the jack according to the spirit level liquid bubble, and fix it with the adjusting screws on the longitudinal elevation adjustment block and the transverse elevation adjustment block, and then install the triangular steel arch frame.

[0026] Preferably, if a sliding triangular arch construction system is adopted, an adjustable arch frame for the main arch ring is adopted. First, a sandbox base is installed on the pier body, and a sandbox and a prefabricated base elevation adjustment jack are installed on the sandbox base. Then, the prefabricated base is installed on the upper part of the prefabricated base elevation adjustment jack, and the height of the prefabricated base is adjusted by the prefabricated base elevation adjustment jack. Then, sand is poured into the sandbox to fix it, and then a sliding base is installed on the embedded I-beam. After the sliding base slides to the designated position on the embedded I-beam, a steel arch frame is installed on the steel arch frame hinge seat on the upper part of the sliding base. After the current concrete arch ring is cast, the sand is released at the same time, and the steel arch frame is slid. After sliding to the designated position, the next concrete arch ring is constructed.

[0027] The beneficial effects of the present invention are:

[0028] 1) One end of the steel arch frame is supported by the arch foot anchoring system; the horizontal and longitudinal elevations of the arch foot anchoring system are adjusted by longitudinal elevation adjusting blocks, horizontal elevation adjusting blocks, and adjusting jacks, thereby improving the installation construction efficiency; the first section of the steel arch frame is supported by left and right supporting trusses, thereby reducing the displacement effect of subsequent steel arch frame construction on the installation of the first section of the steel arch frame, thereby reducing the workload of adjusting the arch axis; a hinge seat limit plate is set on the steel arch frame hinge seat, thereby improving the construction efficiency of the steel arch frame installation.

[0029] 2) The other end of the steel arch frame is supported by fixing the steel frame through the arch foot; a lower jack of the support frame column is set at the bottom of the steel support frame column, and the verticality of the steel support frame column is adjusted by the lower jack of the support frame column, thereby ensuring the installation accuracy of the steel arch frame; an upper jack of the support frame column is set on the top surface of the steel support frame column, and the horizontality of the steel support frame load-bearing beam is adjusted by the jack, thereby ensuring the installation accuracy of the steel arch frame; a wedge-shaped top block with a slide groove is set on the top surface of the auxiliary support frame, which can quickly slide and adjust the height of the hinge seat of the first section of the steel arch frame, thereby improving construction efficiency.

[0030] 3) The hanging basket suspended casting system can carry out sliding support of the steel arch frame, greatly improving the efficiency of the concrete arch ring casting construction of the formwork; the hanging basket and the concrete arch ring side formwork are fixed by the formwork fixing end plate and the end plate connecting rod, which improves the construction efficiency of the formwork fixing; the hanging basket system is equipped with oblique hanging basket reinforcement channel steel to ensure the safety of the hanging basket system during use.

[0031] 4) The adjustable steel arch frame of the main arch ring can be applied to the construction of the arch axis within a certain range, which improves the material utilization rate; the adjustable steel arch frame can slide in the direction perpendicular to the arch axis, and after one section of construction is completed, it can slide to the next working surface to continue construction, which improves the efficiency of concrete arch construction.

[0032] 5) The steel pipe columns of the brackets are connected by flanges to ensure the overall stability of the main arch ring bracket system; the overall position of the brackets is adjusted through the elevation adjustment system, thereby ensuring the overall aesthetics of the bridge; the cast-in-place full-bridge brackets are supported by Bailey beams and short columns below, which can ensure that the stress and deformation of the arch frame during the arch ring formation process are within the allowable range, thereby ensuring its safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the invention;

[0034] Figure 2 It is the overall structural diagram of the arch foot anchoring system;

[0035] Figure 3 This is an enlarged view of the arch foot anchorage system structure;

[0036] Figure 4 yes Figure 3 Enlarged view of area A in the middle;

[0037] Figure 5 It is a schematic diagram of the structure of the longitudinal elevation adjustment block;

[0038] Figure 6 It is a schematic diagram of the pier anchor plate structure;

[0039] Figure 7 This is a schematic diagram of the position of the hinge seat limit plate;

[0040] Figure 8 This is the overall structural diagram of the arch foot fixed steel frame;

[0041] Figure 9 It is a structural diagram of the connection between the auxiliary support frame and the wedge-shaped top block;

[0042] Figure 10 It is a schematic diagram of the load-bearing beam structure;

[0043] Figure 11 Schematic diagram of the bottom structure of the support frame column;

[0044] Figure 12 This is a cross-sectional view of the bottom structure of the support frame column;

[0045] Figure 13 This is the overall structure diagram of the hanging basket suspended pouring system;

[0046] Figure 14 yes Figure 13 Enlarged view of area B in the middle;

[0047] Figure 15 It is a schematic diagram of the plan view of the hanging basket support;

[0048] Figure 16 This is a schematic diagram of the bottom structure of the hanging basket;

[0049] Figure 17 It is a schematic diagram of template support;

[0050] Figure 18 It is a schematic diagram of the sliding direction of the hanging basket.

[0051] Figure 19 This is the overall structural diagram of the adjustable arch frame of the main arch ring;

[0052] Figure 20 It is a schematic diagram of the prefabricated base structure;

[0053] Figure 21 This is a schematic diagram of the arch preload water tank system;

[0054] Figure 22 yes Figure 21 Magnified view of area C in the middle.

[0055] Figure 23It is the overall structural diagram of the cast-in-place support system;

[0056] Figure 24 It is a schematic diagram of the double-column foundation structure of the support steel pipe column;

[0057] Figure 25 It is a schematic diagram of the short column foundation structure;

[0058] Figure 26 This is a schematic diagram of the top structure of the support steel pipe column;

[0059] Figure 27 This is a schematic diagram of the connection structure between the short column and the full-hall bracket;

[0060] Figure 28 yes Figure 27 Magnified view of area D in the middle.

[0061] Including: 1. Pier 2. Longitudinal elevation adjustment block 3. Load-bearing I-beam stiffener 4. Pier anchor plate 5. Pier anchor rod 6. Right support truss base plate fixing bolt 7. Right support truss base plate 8. Right support truss 9. Steel arch support plate 10. Support plate positioning block 11. I-beam crossbeam 12. Level gauge 13. Hinge limit plate 14. Steel arch hinge 15. Load-bearing I-beam 16. Left support truss 17. Pier truss anchor plate 18. Adjustment screw 19. Horizontal elevation adjustment block 20. Adjustment jack 21. Steel arch 22. Concrete arch ring 23. Truss upright stiffener 24. Section steel support frame anchor plate 25. Horizontal fixed channel steel 26. Longitudinal channel steel tie beam 27. Section steel support frame load-bearing beam 28. Section steel support frame load-bearing beam stiffener plate 29. Distribution beam stiffener Strong block 30. Auxiliary support 31. Auxiliary support fixing bolts 32. Auxiliary support top plate 33. Wedge-shaped top block with slotted ear plate 34. Wedge-shaped top block 35. Steel arch frame hinge limit plate 36. Distribution beam 37. Distribution beam external stiffening plate 38. Distribution beam internal stiffening plate 39. Flat support 40. Jack top plate for support frame column 41. Jack on support frame column 42. Jack positioning plate for support frame column 43. Support frame column reinforcement ring 44. Support frame column ear plate 45. Support frame column ear plate fixing bolts 46. Support frame column lower jack 47. Lower jack limit cylinder 48. Support frame column stiffening cylinder 49. Stiffening cylinder base 50. Stiffening cylinder embedded parts 51. Flat support limit ring 52. Concrete arch ring bottom form 53. Arch ring side form ear plate 54 Formwork fixing end plates 55. End plate fixing bolts 56. End plate connecting rods 57. Arch ring side forms 58. Upper channel steel for hanging basket 59. Guardrail posts 60. Protective net 61. Guardrail post positioning tubes 62. Hanging basket base plate 63. Upper channel steel slider for hanging basket 64. Upper slide rail for hanging basket 65. Steel arch frame 66. Hanging basket reinforced channel steel 67. Lower channel steel slider for hanging basket 68. Lower slide rail for hanging basket 69. Lower channel steel for hanging basket 70. Connecting plate for lower slide rail for hanging basket 71. Bottom formwork back rib 72. Sand discharge pipe 73. Sand discharge cover 74. Sand box 75. Precast base 76. Embedded I-beam 77. Sliding base plate 78. Sand box base 79. Sand 80. Shelf slot for precast base elevation adjustment jack 81. Precast base elevation adjustment jack 82. Base embedded reinforcement plate 83. Horizontal sliding reinforcement block 8 4. Water tank support column fixing bolts 85. Water tank support column 86. Curvature adjustment stiffener 87. Upper curvature adjustment rod 88. Lower curvature adjustment rod 89. Pole height adjustment sleeve 90. Water tank support system 91. Crossbar length adjustment sleeve 92. Water tank 93. Water tank back rib 94. Water tank guardrail 95. Water tank limit reinforcement plate 96. Column cover plate 97. Column top distribution beam 98. Distribution beam pad 99. Water tank base plate 100. Cast-in-place full-floor support 101. Bailey beam 102. Double column foundation 103. Embedded angle steel 104. Embedded rebar frame 105. Double column foundation embedded base plate 106. Flange stiffener 107. Support steel pipe column thickening ring 108. Flange 109. Support steel pipe column 110. Short column foundation 111.Short column foundation: embedded I-beam 112. Short column base 113. Short column stiffening ring plate 114. Short column 115. Upper flange 116. Bailey beam adjustment jack 117. Triangular pad fixing bolts 118. Bailey beam placement base plate 119. Triangular pad for elevation adjustment 120. Short column end plate 121. Internal steel reinforcement beam 122. Upper and lower end plate connecting bolts 123. Short column upper end plate 124. Sleeper. DETAILED DESCRIPTION

[0062] The present invention will be further described below with reference to the following examples. The following examples are provided only to facilitate understanding of the present invention. It should be noted that, without departing from the principles of the present invention, it is possible for a person skilled in the art to make various modifications to the present invention, and such improvements and modifications fall within the scope of the claims of the present invention.

[0063] Example 1

[0064] As an example, Figures 1 to 28 As shown, a cast-in-place concrete main arch ring triangular steel arch frame formwork system includes: an arch foot anchoring system, an arch foot fixed steel frame, a hanging basket suspended casting system, an adjustable arch frame for the main arch ring and a cast-in-place support system;

[0065] The arch foot anchoring system and the arch foot fixed steel frame are suitable for the construction of fixing the steel arch frame 21 , and respectively support one end of the steel arch frame 21 . The arch foot anchoring system is arranged on the pier body 1 .

[0066] The arch foot anchoring system includes a load-bearing I-beam 15, a steel arch frame hinge seat 14, a right support truss 8, and a left support truss 16. A transverse elevation adjustment block 19, an adjustment jack 20, and a longitudinal elevation adjustment block 2 are provided between the load-bearing I-beam 15 and the pier body 1. The right support truss 8 is placed on the load-bearing I-beam 15. A right support truss base plate 7 is provided at the bottom of the right support truss 8. The right support truss 8 and the right support truss base plate 7 are fixed together by right support truss base plate fixing bolts 6. A steel arch frame support plate 9 is provided on the top of the right support steel truss 8. The left support truss 16 is placed on the pier body 1. A pier truss anchor plate 17 is provided at the bottom of the left support truss 16. A truss upright stiffening cylinder 23 is provided on top of the pier truss anchor plate 17. The bottom end of the column of the left support truss 16 is located within the truss upright stiffening cylinder 23. A steel arch hinge seat 14 is also provided on the load-bearing I-beam 15. A hinge seat limiting plate 13 is provided on the steel arch hinge seat 14. A steel arch is provided on the steel arch hinge seat 14. A concrete arch ring 22 is provided on the outer side of the steel arch 21.

[0067] The arch foot fixing system also includes a level gauge 12 and load-bearing I-beam stiffeners 3. I-beam crossbeams 11 are installed between the load-bearing I-beams 15 for reinforcement. Pier anchor plates 4 are installed at the ends of these I-beam crossbeams 11, which are then anchored with pier anchor rods 5. A level gauge 12 is installed on the load-bearing I-beams 15. After the adjustment jacks 20 are adjusted to the horizontal position, the longitudinal and transverse elevation adjustment blocks 2 and 19 are secured using adjustment screws 18.

[0068] The arch foot fixed steel frame includes: a steel arch frame hinge seat 14, a steel support frame, a distribution beam 36, an auxiliary support frame 30 and a steel support frame load-bearing beam 27; a steel support frame anchor plate 24 is provided on the side of the pier body 1, and a transverse fixed channel steel 25 is provided between the steel support frame column and the steel support frame anchor plate 24 on the pier body 1, and a longitudinal channel steel tie beam 26 is provided between the two steel support frames.

[0069] A steel support frame load-bearing beam 27 is provided on the top surface of the steel support frame, a steel support frame column is provided at the bottom of the steel support frame load-bearing beam 27, a support frame column upper jack 41 is provided on the top of the steel support frame column, a steel support frame load-bearing beam 27 is provided inside the steel support frame load-bearing beam 27, a steel support frame anchor plate 24 is provided at the end of the steel support frame load-bearing beam 27, a support frame column reinforcement ring 43 is provided on the top surface of the steel support frame column, a support frame column upper jack positioning plate 42 is provided on the support frame column upper jack positioning plate 42, a support frame column upper jack 41 is provided on the top surface of the support frame column upper jack 41, and a support frame column upper jack top plate 40 is provided on the top surface of the support frame column upper jack 41; the horizontality of the steel support frame load-bearing beam 27 is adjusted by the support frame column upper jack 41, thereby ensuring the installation accuracy of the steel arch frame 21.

[0070] A stiffening tube base 49 and a lower jack 46 for the support frame column are provided at the bottom of the section steel support frame column; a stiffening tube embedded part 50 is provided at the bottom of the stiffening tube base 49, a support frame column stiffening tube 48 is provided on the top surface of the stiffening tube base 49, a lower jack limiting tube 47 is provided on the top surface of the support frame column stiffening tube 48, a lower jack 46 is provided in the lower jack limiting tube 47, a support frame column lower jack 46 is provided in the lower jack limiting tube 47, a support frame column ear plate 44 is provided on the top surface of the support frame column lower jack 46, a support frame column ear plate fixing bolt 45 is provided between the support frame column ear plate 44 and the support frame column stiffening tube 48, a section steel support frame column is provided in the section steel support frame column stiffening tube 48; the verticality of the section steel support frame column is adjusted by the lower jack 46 for the support frame column, thereby ensuring the installation accuracy of the steel arch frame 21.

[0071] A level gauge 12 is provided on the top surface of the steel support frame load-bearing beam 27 .

[0072] The top surface of the section steel support frame load-bearing beam 27 is also provided with a steel arch frame hinge seat 14 and an auxiliary support frame 30. The top surface of the section steel support frame load-bearing beam 27 is provided with two sets of distribution beam systems. Three distribution beams 36 are provided on the left side of the top surface of the section steel support frame load-bearing beam 27. Distribution beam inner stiffening plates 38 are provided between the distribution beams 36. Distribution beam outer stiffening plates 37 are provided on the outside of the distribution beam 36. Distribution beam reinforcement blocks 29 are provided at the bottom of the distribution beam outer stiffening plates 37. A steel arch frame hinge seat 14 is provided on the top surface of the distribution beam 36. Steel arch frame hinge seat limit plates 35 are provided on both sides of the steel arch frame hinge seat 14. A hinge seat limit plate 13 is provided on the steel arch frame hinge seat 14.

[0073] A distribution beam 36 is provided on the right side of the top surface of the steel support frame load-bearing beam 27, and an auxiliary support frame 30 is provided on the top surface of the distribution beam 36. An auxiliary support frame 30 is provided on the top surface of the auxiliary support frame 30. An auxiliary support frame top plate 32 is provided on the top surface of the auxiliary support frame 30. The auxiliary support frame top plate 32 is provided with a wedge-shaped top block 34 through a slide groove. The height of the first section steel arch frame hinge seat 14 can be quickly adjusted by sliding the wedge-shaped top block 34. An auxiliary support frame fixing bolt 31 is provided between the auxiliary support frame top plate 32 and the wedge-shaped top block 34, and wedge-shaped top block grooved ear plates 33 are provided on both sides of the wedge-shaped top block 34.

[0074] The steel arch frame hinge seat 14 and the auxiliary support frame 30 respectively support the arch foot at one end of the steel arch frame 21.

[0075] The hanging basket suspended pouring system includes: a concrete arch ring bottom formwork 52, a formwork fixed end plate 54, a hanging basket system, a steel arch frame 65, a hanging basket reinforcement channel steel 66 and a hanging basket upper channel steel 58. The hanging basket system is set on the steel arch frame 65, and a hanging basket sliding track system of the hanging basket system is set on one side of the steel arch frame 65. The concrete arch ring formwork system is set on one side of the hanging basket system.

[0076] The upper crossbar of the steel arch frame 65 is provided with a hanging basket upper slide rail 64 on one side, and a hanging basket lower rail 68 on one side of the lower crossbar of the steel arch frame 65. The lower crossbar of the steel arch frame 65 and the hanging basket lower rail 68 are fixed by a hanging basket lower sliding track connecting plate 70. The hanging basket upper slide rail 64 is provided with a hanging basket upper channel steel slider 63, and the hanging basket lower rail 68 is provided with a hanging basket lower channel steel slider 67. The hanging basket upper channel steel slider 63 is provided with a hanging basket upper channel steel 58, and the hanging basket lower channel steel slider 67 is provided with a hanging basket lower channel steel 69. The hanging basket upper channel steel 58 and the hanging basket lower channel steel 69 correspond to each other as a group. A hanging basket reinforcement channel steel 66 is provided between each group of hanging basket upper channel steel 58 and hanging basket lower channel steel 69 to form a hanging basket system. The hanging basket reinforcement channel steel 66 improves the strength of the hanging basket system and ensures the safety of the hanging basket system. The hanging basket system is slidably connected to the hanging basket upper slide rail 64 and the hanging basket lower rail 68.

[0077] An end plate connecting rod 56 is provided on one side of the template fixed end plate 54, the bottom of which is placed on the upper channel steel 58 of the hanging basket. A concrete arch ring side form 57 is provided on the other side of the template fixed end plate 54. A plurality of arch ring side form lugs 53 are provided at the end of the concrete arch ring side form 57. End plate fixing bolts 55 are provided between the arch ring side form lugs 53 and the template fixed end plate 54. A concrete arch ring bottom form 52 is provided on the top surface of the steel arch frame 65, and a bottom form back rib 71 is provided between the concrete arch ring bottom form 52 and the steel arch frame 65.

[0078] The top surface of the hanging basket upper channel steel 58 is paved with a hanging basket bottom plate 62 , and the end of the hanging basket upper channel steel 58 is provided with a guardrail column positioning tube 61 , and the guardrail column positioning tube 61 is provided with a guardrail column 59 , and a protective net 60 is provided between the guardrail columns 59 .

[0079] The hanging basket system is supported by both ends of the steel arch frame at the same time. First, the formwork is supported in sections and then concrete is poured. After the concrete is cured, the hanging basket system slides to the next section and supports the formwork. This cycle is repeated until the arch top is closed. There is no need for repeated disassembly and assembly operations, which greatly improves the efficiency of pouring the concrete arch ring 22 with formwork.

[0080] The main arch ring adjustable arch frame is suitable for the construction of a sliding triangular arch frame. The main arch ring adjustable arch frame includes: a steel arch frame hinge seat 14, a sand box 74, a prefabricated base 75, a sliding base plate 77, a prefabricated base elevation adjustment jack 81, a water tank 92, a water tank support system 90 and a water tank support column 85;

[0081] The top surface of the pier body 1 is provided with a sandbox base 78, and the sandbox base 78 is provided with a sandbox reserved groove and a prefabricated base elevation adjustment jack shelf groove 80, and a prefabricated base elevation adjustment jack shelf groove 80 is provided with a prefabricated base elevation adjustment jack 81. The prefabricated base elevation adjustment jack shelf groove 80 is arranged every other construction span, and a sandbox 74 is arranged in the sandbox reserved groove, and sand 79 is arranged in the sandbox 74. A sand discharge cover 73 is provided at the end of the sand discharge pipe 72, and a sand discharge pipe 72 is provided on the sandbox 74. The sandbox 74 can be used for fixing and adjusting the levelness of the prefabricated base 75.

[0082] The prefabricated base 75 is long and narrow, arranged along the riverbank. It rests on a prefabricated base elevation adjustment jack 81, which has a pre-embedded base reinforcement plate 82 on its top. The prefabricated base 75 also has a support I-beam on its bottom, which is placed in a sandbox 74. A double-jointed pre-embedded I-beam 76 serves as a sliding track on its top. The double-jointed pre-embedded I-beam 76 is slidably connected to a sliding base plate 77. A steel arch hinge 14 is provided on its top surface, supporting the steel arch 21. A transverse sliding reinforcement block 83 is located in the middle of the sliding base plate 77. The sliding base plate 77 and the steel arch 21 above it can slide in a direction perpendicular to the arch axis. After one section is completed, the construction can be continued on the next working surface, improving the efficiency of concrete arch construction.

[0083] The water tank support system 90 is arranged on the steel arch frame 21, and the steel arch frame 21 is provided with a water tank support column 85. The steel arch frame 21 and the water tank support column 85 are connected by a water tank support column fixing bolt 84; the water tank support column 85 is provided with a column height adjustment sleeve 89, and the support cross bar of the water tank support system 90 is provided with a cross bar length adjustment sleeve 91. The water tank support system 90 is provided with a scissors brace, and the top surface of the water tank column 85 is provided with a column cover plate 96, and the column cover plate 96 is provided with a column top distribution beam 97, and the column top distribution beam 97 is provided with a distribution beam pad 98, and the distribution beam pad 98 is provided with a water tank placement bottom plate 99, and the water tank placement bottom plate 99 is provided with a water tank 92. The outer side of the side wall of the water tank 92 is provided with a water tank back rib 93, the outer side of the water tank 92 is provided with a water tank guardrail 94, and the water tank 92 is provided with a water tank limit reinforcement plate 95 on the water tank placement bottom plate 99 at the bottom of the water tank 92.

[0084] The steel arch frame 21 is further provided with an upper curvature adjustment rod 87 and a lower curvature adjustment rod 88. A curvature adjustment rod reinforcement space 86 is provided between the upper curvature adjustment rod 87 and the lower curvature adjustment rod 88, which can be applied to the construction of the arch axis within a certain range, thereby improving material utilization.

[0085] The cast-in-situ support system includes: a level gauge 12, a cast-in-situ full-floor support 100, a double-column foundation 102, a flange 108, a short column foundation 110 and a Bailey beam 101;

[0086] The top surface of the double-column foundation 102 is provided with two support steel pipe columns 109, on which a Bailey beam 101 is provided, and between the support steel pipe column 109 and the Bailey beam 101, a Bailey beam adjustment jack 116 is provided, and the top of the support steel pipe column 109 is provided with an upper flange 115, on which several Bailey beam adjustment jacks 116 are symmetrically provided, and the top surface of the Bailey beam adjustment jack 116 is provided with a Bailey beam placement base plate 118, and the Bailey beam A Bailey beam 101 and a spirit level 12 are provided on the upper part of the placement base plate 118. A plurality of elevation adjustment triangular pads 119 are provided between the bracket steel pipe column 109 and the Bailey beam placement base plate 118. A triangular pad fixing bolt 117 for fixing the elevation adjustment triangular pad 119 is provided at the end of the Bailey beam placement base plate 118. After adjusting the level of the Bailey beam placement base plate 118, the elevation adjustment triangular pad 119 is fixed by the triangular pad fixing bolt 117.

[0087] A flange 108 is provided at the bottom of the bracket steel pipe column 109, and a bracket steel pipe column thickening ring 107 is provided at the lower part of the flange 108. A flange stiffening plate 106 is provided on the outer side of the bracket steel pipe column thickening ring 107. A double-column foundation embedded bottom plate 105 is provided at the bottom of the bracket steel pipe column thickening ring 107, and embedded angle steel 103 and embedded steel bar frame 104 are provided under the double-column foundation embedded bottom plate 105; a reinforced truss system is provided between the bracket steel pipe columns 109 on the two double-column foundations 102.

[0088] The short column foundation 110 is provided with a short column foundation embedded I-beam 111, and a short column base 112 is provided on the upper part of the short column foundation embedded I-beam 111. A short column 114 is provided on the short column base 112. A short column 114 is provided on the top surface of the short column 114. A short column end plate 120 is provided on the top surface of the short column end plate 120. A built-in steel reinforcement beam 121 is provided on the top surface of the short column end plate 120. A short column upper end plate 123 is provided on the periphery of the built-in steel reinforcement beam 121. The short column end plate 120 is groove-shaped. The short column end plate 120 and the short column upper end plate 123 are fixed by upper and lower end plate connecting bolts 122. A sleeper 124 is provided on the short column upper end plate 120, and a cast-in-place full-floor bracket 100 is provided on the sleeper 124. A short column stiffening ring plate 113 is provided at the foot of the short column 114.

[0089] A cast-in-place full-span support 100 is provided on the Bailey beam 101 and the short column 114. A concrete arch ring 22 is provided on the cast-in-place full-span support 100. Both ends of the concrete arch ring 22 are placed on the pier body 1, which can ensure that the stress and deformation of the arch frame during the formation of the concrete arch ring 22 are within the allowable range, thereby ensuring its safety.

[0090] Example 2

[0091] As another embodiment, this embodiment proposes a construction method for the cast-in-place concrete main arch ring triangular steel arch frame formwork system in Example 1, comprising the following steps:

[0092] Step 1: Pier body construction: During the construction of the pier body 1, the pier body truss anchor plate 17, the pier body anchor plate 4, the steel support frame anchor plate 24, the stiffening tube embedded parts 50, etc. are installed at the designed position.

[0093] Construction of double column foundation and short column foundation: Double column foundation 102 and short column foundation 110 are constructed in sequence on the river bank, and short column foundation embedded I-beam 111, embedded steel frame 104 and embedded angle steel 103 are set according to design requirements.

[0094] Erection of cast-in-place support system: short column stiffening ring plate 113 is set on the short column foundation embedded I-beam 111 on the short column foundation, and then the short column 114 is installed in the short column stiffening ring plate 113, and installed on the double column foundation embedded bottom plate 105, and then the flange 108 on the support steel pipe column thickening ring 107 is installed, and the flange stiffening plate 106 is welded on the flange 108, and finally the support steel pipe column 109 is installed on the flange, and then the truss reinforcement system is installed between the two groups of support steel pipe column systems. Install the short column end plate 120 on the top surface of the short column 114, and install the built-in steel reinforcement beam 121 on the short column end plate 120, then install the short column upper end plate 123 and fix it with the upper and lower end plate connecting bolts 122, then install the sleeper 124 on the short column upper end plate 120, and finally install the cast-in-place full-span bracket 100 on the upper part of the short column 114; install the Bailey beam adjustment jack 116 on the upper flange 115 on the upper part of the bracket steel pipe column 109, set the number of elevation adjustment triangular pads 119 according to the design requirements and the requirements of the level gauge 12 liquid bubble, and fix it with the triangular pad fixing bolts 117, then install the Bailey beam 101 on the Bailey beam placement base plate 119, and finally install the remaining cast-in-place full-span brackets 100, and pour the concrete arch ring 22.

[0095] Step 2, construction of arch foot anchoring system: the main span concrete arch ring casting construction adopts triangular steel arch frame system, and one side of the arch foot is supported by the arch foot anchoring system. First, the left supporting truss 16 is installed on the truss upright stiffening tube on the pier body truss anchor plate 17, and the longitudinal elevation adjustment block 2 and the transverse elevation adjustment block 19 and the adjustment jack 20 are installed on the pier body. Then the load-bearing I-beam 15 is installed, the I-beam crossbeam 11 is welded between the two load-bearing I-beams, and the load-bearing I-beam stiffening plate 3 is constructed simultaneously. The level meter 12 and the steel arch frame hinge seat 14 of the ancient hinge seat limit plate 13 are installed on the load-bearing I-beam 15, and the right supporting truss 8 is installed on one side. The horizontal position of the load-bearing I-beam 15 is adjusted by adjusting the jack 20 according to the bubble of the level meter 12, and fixed with the adjusting screws on the longitudinal elevation adjustment block 2 and the transverse elevation adjustment block 19. After the system adjustment is completed, the triangular steel arch frame 21 is installed.

[0096] Step 3, construction of the arch foot fixed steel frame: the main span concrete arch ring casting construction adopts the triangular steel arch frame system, and the arch foot on the other side adopts the steel support frame support system. First, install the support frame column on the support frame column stiffening cylinder 48, and adjust the verticality of the column through the support frame column lower jack 56 on the column. After the steel column is installed, install the longitudinal channel steel tie beam 26, install the transverse fixed channel steel 25 on the steel support frame anchor plate 24, and then install the support frame column upper jack positioning plate 42 on the support frame column. The jack 40 adjusts the horizontality of the steel support frame load-bearing beam 27 through the previous few days and the level meter, and then installs the steel support frame load-bearing beam stiffening plate 28 of the steel support frame load-bearing beam 27, and then installs the distribution beam 36, the distribution beam inner stiffening plate 38, and the distribution beam reinforcement block 29. The steel arch frame hinge seat 14 is installed on the three-piece distribution beam 36, and the auxiliary support frame 30 is installed on the top of the single distribution beam 36, and the auxiliary support frame top plate 32 is installed on the top surface of the auxiliary support frame. The position is adjusted by adjusting the slotted wedge-shaped top block to support the triangular steel arch frame rod.

[0097] Step 4, hanging basket installation: After the steel arch frame 21 is installed, the hanging basket lower rail connecting plate 70 is used to assist in installing the hanging basket lower rail 69 on one side of the steel arch frame 21, the hanging basket upper slide rail 64 is installed on the upper chord of the triangular steel arch frame, and the hanging basket lower channel steel 69 is installed on the hanging basket lower rail 68, the hanging basket upper channel steel 58 with the hanging basket upper channel steel slider 63 is installed on the hanging basket upper slide rail 64, and the hanging basket reinforcement channel steel 66 is welded between the two channel steels, the guardrail column 59 is installed in the guardrail column positioning tube 61 at the end of the hanging basket upper channel steel 58, and the protective net 60 is installed between the guardrail columns, the hanging basket bottom plate 62 is laid flat on the hanging basket upper channel 58 steel, and the bottom mold back rib 71 is laid on the top surface of the triangular steel arch frame, then the concrete arch ring bottom mold 52 is installed, and then the arch ring side mold 57 is installed. The arch ring side mold ear plate 53 on the arch ring side mold 57 is fixed to the template fixing end plate 54 on the hanging basket upper channel steel with the end plate fixing bolts 55.

[0098] Step 5: Water Tank Preload System Construction: Install the water tank support column 85 with the column height adjustment sleeve 89 on the triangular steel arch 21. Adjust the column height adjustment sleeve 89 as needed, arrange the crossbar on the column, and adjust the crossbar length adjustment sleeve 91 to the appropriate length, and then install the scissor brace. Install the column cover plate 96 on the top surface of the water tank support column 85. Install the column top distribution beam 97 on the column cover plate. Install the water tank base plate 99 on the distribution beam. Install the water tank 92 with the water tank back rib 93 on the water tank base plate 99.

[0099] Step 6: Main arch ring concrete pouring: After the above steps are completed, the main arch ring concrete pouring is carried out.

[0100] If a sliding triangular arch construction system is used, the following construction method is adopted: first, a sandbox base 78 is installed on the pier body 1, and a sandbox 74 and a prefabricated base elevation adjustment jack 81 are installed; then, a prefabricated base 75 is installed on its upper part; the height of the prefabricated base 75 is adjusted by the prefabricated base elevation adjustment jack 81; then, sand 79 is poured in to fix it; then, a sliding base 77 is installed on the embedded I-beam 76; the sliding base can slide on the embedded I-beam 76 with the help of a horizontal jack; after sliding to a designated position, a triangular steel arch 21 is installed on the steel arch hinge 14 on its upper part; after the current concrete arch ring 22 is cast, a horizontal jack is used to push on the transverse sliding reinforcement block 83; at the same time, sand 79 is released to slide the steel arch 21; after sliding to a designated position, the next concrete arch ring 22 is constructed.

Claims

1. A cast-in-place concrete main arch ring triangular steel arch formwork system, characterized in that: include: Arch foot anchoring system, arch foot fixed steel frame, hanging basket suspended pouring system, main arch ring adjustable arch frame and cast-in-place support system; The arch foot anchoring system and the arch foot fixed steel frame respectively support one end of the steel arch frame (21), the arch foot anchoring system includes a load-bearing I-beam (15) and a left supporting truss (16), and a transverse elevation adjustment block (19), an adjustment jack (20) and a longitudinal elevation adjustment block (2) are provided between the load-bearing I-beam (15) and the pier body (1); a steel arch frame hinge seat (14) and a right supporting truss (8) are provided on the load-bearing I-beam (15), and the left supporting truss (16) is placed on the pier body (1); the arch foot fixed steel frame includes a steel support frame load-bearing beam (27) and a steel support frame column, the steel support frame column is provided with a support frame column upper jack (41) and a support frame column lower jack (46), and the steel support frame load-bearing beam (27) is provided with a steel arch frame hinge seat (14) and an auxiliary support frame (30); The main arch ring hanging basket suspended pouring system includes a steel arch frame (65), the top surface of the steel arch frame (65) is provided with a concrete arch ring bottom mold (52), one side of the steel arch frame (65) is slidably connected to a hanging basket system, and the hanging basket system is connected to a concrete arch ring side mold (57) through an end plate connecting rod (56); the main arch ring adjustable arch frame includes a prefabricated base (75), and the prefabricated base (75) is provided on the pier body (1) through a prefabricated base elevation adjustment jack (81) and a sand box (74). The prefabricated base (75) is slidably connected to the steel arch frame (21); the steel arch frame (21) is provided with a water tank (92), an upper curvature adjustment rod (87) and a lower curvature adjustment rod (88); the cast-in-place support system includes a support steel pipe column (109) and a short column (114); the support steel pipe column (109) is provided with a Bailey beam (101); the Bailey beam (101) and the short column (114) are provided with a concrete arch ring (22) through a cast-in-place full-floor support (100).

2. The cast-in-situ concrete main arch ring triangular steel arch formwork system according to claim 1 is characterized by: The arch foot anchoring system is arranged on the pier body (1), and the bottom of the left supporting truss (16) is connected to the pier body (1) through the pier body truss anchor plate (17); the arch foot anchoring system also includes a level gauge (12) and a load-bearing I-beam stiffening plate (3); an I-beam crossbeam (11) is arranged between the load-bearing I-beams (15), and the end of the I-beam crossbeam (11) is connected to the pier body (1) through the pier body anchor plate (4); a level gauge (12) is arranged on the load-bearing I-beams (15), and a longitudinal elevation adjustment block (2) and a transverse elevation adjustment block (19) are respectively fixed by adjustment screws (18); a hinge seat limiting plate (13) is arranged on the steel arch frame hinge seat (14), and a steel arch frame is arranged on the steel arch frame hinge seat (14).

3. The cast-in-situ concrete main arch ring triangular steel arch formwork system according to claim 1 is characterized by: In the arch foot fixed steel frame, a steel support frame load-bearing beam (27) is provided at the bottom of the steel support frame column, a support frame column upper jack (41) is provided at the top of the steel support frame column, a stiffening cylinder base (49) and a support frame column lower jack (46) are provided at the bottom of the steel support frame column; a level gauge (12) is provided on the top surface of the steel support frame load-bearing beam (27); a steel arch frame hinge seat (14) and an auxiliary support frame (30) are also provided on the top surface of the steel support frame load-bearing beam (27), and a distribution beam (36) is provided at the bottom of the steel arch frame hinge seat (14) and the auxiliary support frame (30); the steel arch frame A steel arch frame hinge seat limiting plate (35) is provided on both sides of the hinge seat (14), a hinge seat limiting plate (13) is provided on the steel arch frame hinge seat (14), and the steel arch frame hinge seat (14) and the auxiliary support frame (30) respectively support the steel arch frame (21); a wedge-shaped top block (34) is provided on the auxiliary support frame top plate (32) through a slide groove, an auxiliary support frame fixing bolt (31) is provided between the auxiliary support frame top plate (32) and the wedge-shaped top block (34), and wedge-shaped top block grooved ear plates (33) are provided on both sides of the wedge-shaped top block (34); a transverse fixing channel steel (25) is provided between the steel support frame column and the pier body (1).

4. The cast-in-situ concrete main arch ring triangular steel arch formwork system according to claim 1 is characterized by: The main arch ring hanging basket suspended casting system also includes a template fixed end plate (54); a hanging basket upper slide rail (64) is provided on one side of the upper crossbar of the steel arch frame (65), and a hanging basket lower slide rail (68) is provided on one side of the lower crossbar of the steel arch frame (65); the hanging basket system is slidably connected to the hanging basket upper slide rail (64) and the hanging basket lower slide rail (68) through the hanging basket upper channel steel slider (63) and the hanging basket lower channel steel slider (67); an end plate connecting rod (56) is provided on one side of the template fixed end plate (54), and the bottom of the end plate connecting rod (56) is connected to the hanging basket system. A concrete arch ring side mold (57) is provided on the other side of the template fixed end plate (54), and a concrete arch ring bottom mold (52) is provided on the top surface of the steel arch frame (65); a hanging basket bottom plate (62) is laid on the top surface of the hanging basket upper channel steel (58), and a guardrail column positioning cylinder (61) is provided at the end of the hanging basket upper channel steel (58), and a guardrail column (59) is provided in the guardrail column positioning cylinder (61), and a protective net (60) is provided between the guardrail columns (59); a bottom mold back rib (71) is provided between the concrete arch ring bottom mold (52) and the steel arch frame (65).

5. The cast-in-situ concrete main arch ring triangular steel arch formwork system according to claim 1 is characterized by: In the main arch ring adjustable arch frame, the top surface of the pier body (1) is provided with a sandbox base (78), the sandbox base (78) is provided with a sandbox (74) and a prefabricated base elevation adjustment jack (81), and the sandbox (74) is provided with a sand discharge pipe (72); the prefabricated base (75) is arranged along the river bank line, the prefabricated base (75) is provided on the prefabricated base elevation adjustment jack (81), and the bottom surface of the prefabricated base (75) is also provided with a shelf I-steel, and the shelf I-steel is placed in the sandbox (74); the top surface of the prefabricated base (75) is provided with a pre-buried I-steel (76), the pre-buried I-steel (76) is slidably connected to a sliding base plate (77), the top surface of the sliding base plate (77) is provided with a steel arch frame hinge seat (14), and the steel arch frame hinge seat (14) supports the steel arch frame (21); the steel arch frame (21) is provided with a water tank ( 92); the water tank support system (90) comprises a water tank support column (85), the water tank support column (85) is provided with a column height adjustment sleeve (89), the support cross bar of the water tank support system (90) is provided with a cross bar length adjustment sleeve (91), the top surface of the water tank column (85) is provided with a column cover plate (96), the column cover plate (96) is provided with a column top distribution beam (97), the column top distribution beam (97) is provided with a distribution beam pad (98), the distribution beam pad (98) is provided with a water tank placement bottom plate (99), the water tank placement bottom plate (99) is provided with a water tank (92), the outer side of the side wall of the water tank (92) is provided with a water tank back rib (93), the outer side of the water tank (92) is provided with a water tank guardrail (94), and the water tank (92) is provided with a water tank limit reinforcement plate (95) on the water tank placement bottom plate (99) at the bottom position of the water tank (92).

6. The cast-in-situ concrete main arch ring triangular steel arch formwork system according to claim 1, characterized in that: The cast-in-place support system further comprises a double column foundation (102) and a short column foundation (110); a Bailey beam adjustment jack (116) is provided between the support steel pipe column (109) and the Bailey beam (101); and a height adjustment triangular pad (119) is provided between the support steel pipe column (109) and the Bailey beam (101); a flange (108) is provided at the bottom of the support steel pipe column (109); the flange (108) is provided with a support steel pipe column thickening ring (107) and a flange stiffening plate (106). ), a double-column foundation embedded bottom plate (105) is provided at the bottom of the bracket steel pipe column thickening ring (107), and embedded angle steel (103) and embedded steel bar frame (104) are provided under the double-column foundation embedded bottom plate (105); an upper flange (115) is provided at the top of the bracket steel pipe column (109), and a plurality of Bailey beam adjustment jacks (116) are symmetrically provided on the upper flange (115), and a Bailey beam placement bottom plate (118) is provided on the top surface of the Bailey beam adjustment jack (116), and the Bailey beam placement bottom plate ( 118) is provided with Bailey beam (101) and level gauge (12) on the upper part, and elevation adjustment triangular pad (119) is provided between the support steel pipe column (109) and Bailey beam placement base plate (118), and triangular pad fixing bolt (117) is provided at the end of Bailey beam placement base plate (118). When the Bailey beam placement base plate (118) is adjusted to be horizontal, several elevation adjustment triangular pads (119) are fixed by triangular pad fixing bolt (117); the top surface of the short column (114) is provided with a short column end The short column end plate (120) is provided with a built-in steel reinforcement beam (121) on the top surface thereof, and a short column upper end plate (123) is provided on the periphery of the built-in steel reinforcement beam (121); the short column end plate (120) is groove-shaped; the short column end plate (120) and the short column upper end plate (123) are fixed by upper and lower end plate connecting bolts (122); a sleeper (124) is provided on the short column upper end plate (120); and a cast-in-place full-floor bracket (100) is provided on the sleeper (124).

7. The construction method of the cast-in-situ concrete main arch ring triangular steel arch formwork system according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1, erection of cast-in-situ support system: construct pier body (1), install short columns (114) and support steel pipe columns (109), install Bailey beams (101) on the support steel pipe columns (109), install cast-in-situ full-height support (100) and then cast concrete arch ring (22); Step 2: Construction of the arch foot anchoring system: Install the left supporting truss (16) on the pier body (1), install the load-bearing I-beam (15) by installing the longitudinal elevation adjustment block (2), the transverse elevation adjustment block (19) and the adjustment jack (20), install the steel arch frame hinge seat (14) and the right supporting truss (8), and support one end of the steel arch frame (21); Step 3: Construction of the arch foot fixed steel frame: Install the steel support frame and adjust the verticality through the jack (56) under the steel support frame column, install the jack (40) on the support frame column to adjust the horizontality of the steel support frame load-bearing beam (27), install the steel arch frame hinge seat (14) and the auxiliary support frame (30), and support the other end of the steel arch frame (21); Step 4: Installation of the hanging basket suspended pouring system: Slide the hanging basket on one side of the steel arch frame (21), and then install the concrete arch ring bottom formwork (52) and arch ring side formwork (57); Step 5: Construction of the water tank pre-compression system: Install the water tank support system (90) on the steel arch frame (21), adjust the vertical pole height adjustment sleeve (89) and the horizontal pole length adjustment sleeve (91) and install the water tank (92); Step 6: Main arch ring concrete pouring: After the above steps are completed, the main arch ring concrete pouring is carried out.

8. The construction method of the cast-in-situ concrete main arch ring triangular steel arch frame formwork system according to claim 7, characterized in that: In step 1: construct a double column foundation (102) and a short column foundation (110) on the river bank in sequence, install a short column (114) on the short column foundation (110), install a bracket steel pipe column thickening ring (107) and a flange (108) on the double column foundation embedded bottom plate (105), weld a flange stiffening plate (106) on the flange (108), and finally install a bracket steel pipe column (109) on the flange; a reinforcement truss system is provided between the bracket steel pipe columns (109) on the two double column foundations (102); install a short column end plate (120) on the top surface of the short column (114), and install a built-in steel reinforcement beam (121) on the short column end plate (120), and then install The short column upper end plate (123) is fixed with upper and lower end plate connecting bolts (122), and then the sleeper (124) is installed on the short column upper end plate (120), and then the cast-in-place full-floor bracket (100) on the upper part of the short column (114) is installed; the Bailey beam adjustment jack (116) is installed on the upper flange (115) on the upper part of the bracket steel pipe column (109), and the number of triangular pads (119) is adjusted according to the design requirements and the level gauge (12) liquid bubble setting elevation, and fixed with triangular pad fixing bolts (117), and then the Bailey beam (101) is installed on the Bailey beam placement base plate (119), and finally the remaining cast-in-place full-floor brackets (100) are installed, and the concrete arch ring (22) is poured.

9. The construction method of the cast-in-situ concrete main arch ring triangular steel arch frame formwork system according to claim 7, characterized in that: In step 2, the left supporting truss (16) is installed on the pier body (1), and the longitudinal elevation adjustment block (2), the transverse elevation adjustment block (19) and the adjustment jack (20) are installed on the pier body (1), and then the load-bearing I-beam (15) is installed on the longitudinal elevation adjustment block (2), the transverse elevation adjustment block (19) and the adjustment jack (20), and the I-beam crossbeam (11) is welded between the two load-bearing I-beams (15), and the load-bearing I-beam stiffening plate (3) is constructed simultaneously. A level gauge (12) and a steel arch frame hinge seat (14) provided with a hinge seat limit plate (13) are installed on the I-beam (15), and a right supporting truss (8) is installed on the side of the load-bearing I-beam (15) away from the left supporting truss (16). The horizontal position of the load-bearing I-beam is adjusted by adjusting the jack (20) according to the liquid bubble of the level gauge (12), and is fixed with the adjusting screw (18) on the longitudinal elevation adjusting block (2) and the transverse elevation adjusting block (19), and then the triangular steel arch frame is installed.

10. The construction method of the cast-in-situ concrete main arch ring triangular steel arch formwork system according to claim 7, characterized in that: If a sliding triangular arch construction system is used, an adjustable arch ring is used. First, a sandbox base (78) is installed on the pier body (1), and a sandbox (74) and a prefabricated base elevation adjustment jack (81) are installed on the sandbox base (78). Then, a prefabricated base (75) is installed on the upper part of the prefabricated base elevation adjustment jack (81). The height of the prefabricated base (75) is adjusted by the prefabricated base elevation adjustment jack (81), and then sand is poured into the sandbox (74). The steel arch frame (21) is fixed with the steel frame (79), and then the sliding base (77) is installed on the embedded I-beam (76). After the sliding base (77) slides to the specified position on the embedded I-beam (76), the steel arch frame (21) is installed on the steel arch frame hinge seat (14) on the upper part of the sliding base (77). After the current concrete arch ring (22) is poured, the sand (79) is released at the same time, and the steel arch frame (21) is slid. After sliding to the specified position, the next concrete arch ring (22) is constructed.

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