A multi-span deck-type continuous solid-web arch bridge formwork support system and its construction method

Abstract

The present invention relates to the technical field related to bridge construction, specifically to a multi-porous span top-supported continuous solid-web arch bridge formwork support system and a construction method thereof, wherein the multi-porous span top-supported continuous solid-web arch bridge formwork support system includes a support column, an adjustment seat, a connecting seat and a connecting beam, the support column is composed of a main column body and a secondary column body, the main column body is composed of a butt joint tube, an adjustment seat mounting rod and a butt joint rod body, an external thread structure is provided on the outer side wall of the adjustment seat mounting rod, and a primary guide groove is provided on the outer side wall of the butt joint tube; by arranging the support column on the multi-porous span top-supported continuous solid-web arch bridge formwork support system to be composed of a main column body and a secondary column body, it is convenient for staff to adjust the height of the main column body, thereby facilitating the adjustment of the installation height of the connecting beam, and by screwing the adjustment seat, the adjustment accuracy of the connecting beam height is further guaranteed, thereby improving the convenience of subsequent construction.

Description

Technical Field

[0001] The present invention relates to the technical field related to bridge construction, and in particular to a multi-hole span-supported continuous solid-web arch bridge formwork support system and a construction method thereof. Background Art

[0002] An arch bridge is a bridge that uses an arch as the main load-bearing structural member in the vertical plane;

[0003] In the prior art, when an arch bridge is cast in situ, the brackets used for positioning the formwork are all disc-type brackets. However, the traditional disc-type brackets all use a bolt structure to connect the crossbar and the supporting disc, and the connection process is relatively cumbersome. In addition, the height of the supporting disc on the traditional disc-type bracket cannot be adjusted, and the slope of the lower end face of the arch bridge changes gradually, so the traditional disc-type bracket cannot position and support the formwork well, resulting in certain usage defects in actual use. For this reason, the present invention proposes a multi-hole span-supported continuous solid-web arch bridge formwork support system and a construction method thereof to solve the above problems. Summary of the Invention

[0004] The object of the present invention is to provide a porous span-supported continuous solid-web arch bridge formwork support system and a construction method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a multi-hole span deck type continuous solid-web arch bridge formwork support system, the multi-hole span deck type continuous solid-web arch bridge formwork support system comprising:

[0006] The support column is composed of a main column and a secondary column. The main column is composed of a butt joint tube, an adjustment seat mounting rod and a butt joint rod. The outer wall of the adjustment seat mounting rod is provided with an external thread structure, and the outer wall of the butt joint tube is provided with a primary guide groove.

[0007] An adjustment seat, the adjustment seat being screwed onto an adjustment seat mounting rod;

[0008] The connecting seat is sleeved and installed on the butt-jointed pipe, and the connecting seat is composed of a sleeve, an annular seat and a positioning seat;

[0009] A connecting beam is connected to the positioning seat.

[0010] Preferably, a pin hole is provided on the side wall of the docking tube, and four pin holes are arranged in a cross shape. A pin groove is provided on the side wall of the docking rod, and the bottom of the pin groove is connected to a positioning pin through a connecting spring. The upper end of the sub-column has the same structure as the docking tube, and the lower end of the sub-column has the same structure as the docking rod. A secondary guide groove is provided on the inner side wall of the docking tube, and a secondary guide protrusion is integrally formed on the outer side wall of the docking rod. The secondary guide protrusion is arranged corresponding to the secondary guide groove, and when the secondary guide protrusion is fully inserted into the secondary guide groove, its pin hole is aligned with the pin groove, and when the connecting spring is in a reset state, the end of its positioning pin is inserted into the pin hole.

[0011] Preferably, the connection between the auxiliary columns and the auxiliary columns, and between the main column and the auxiliary columns, is achieved by inserting a docking rod into a docking tube for docking, and an auxiliary pop-up spring is provided at the bottom of the docking tube.

[0012] Preferably, the sleeve, annular seat and positioning seat are integrally formed, and a first-level guide protrusion is integrally formed on the inner wall of the sleeve near the upper end. The first-level guide protrusion is arranged corresponding to the first-level guide groove, and the first-level guide protrusion is movably arranged in the first-level guide groove, and the first-level guide groove and the second-level guide groove are staggered.

[0013] Preferably, an annular plate is welded to the outer wall of the docking tube on the main column, a spring groove is opened on the sleeve, a support spring is fixedly connected to the bottom of the spring groove, and the upper end of the support spring is welded to the annular plate.

[0014] Preferably, a positioning rod hole is opened on the upper surface of the adjustment seat, and a positioning rod is welded to the lower surface of the sleeve. The positioning rod and the positioning rod hole are evenly arranged in a circle, and the positioning rod and the positioning rod hole are arranged correspondingly, and the positioning rod is embedded in the positioning rod hole.

[0015] Preferably, the positioning seats are cross-shaped and are provided with four annular grooves, and one of the positioning seats is provided with a slide groove, and a group of slide grooves are provided, and a connecting groove is provided between the slide grooves on both sides, and the connecting groove is communicated with the annular groove, and a positioning ring is movably provided in the annular groove, and a connecting head is integrally formed at the end of the connecting beam, and when the connecting head is actually docked, it is inserted into the gap between the positioning seats, and a positioning hole is provided on the connecting head.

[0016] Preferably, a bump groove is provided on the edge of the positioning seat, and a bump is welded to the edge of the connecting head at the end of the connecting beam. The bump is consistent with the size of the bump groove, and when the bump is embedded in the bump groove, its positioning hole is arranged corresponding to the annular groove, and the positioning ring is arranged through the positioning hole.

[0017] Preferably, an auxiliary pushing member is movably arranged in the connecting groove, and the auxiliary pushing member is composed of a base plate, a slider, a connecting plate, a top plate, a guide rod, a return spring and a pull plate. The base plate, the slider, the connecting plate and the top plate are welded together, and the slider is slidably arranged in the slide groove, the guide rod is movably arranged on the bottom plate and the top plate, and a spring connecting seat is welded on the side wall of the guide rod, the return spring is movably sleeved on the guide rod, and the two ends of the return spring are fixedly connected to the top plate and the spring connecting seat respectively, and the pull plate is welded to the upper end of the guide rod, and the upper side of the positioning ring is provided with a guide rod positioning hole, and the guide rod positioning holes are provided with twelve circumferences, and the length of the connecting groove is greater than the spacing value between adjacent guide rod positioning holes, and when the return spring is in the reset state, the end of its guide rod is embedded in the guide rod positioning hole, and when the guide rod is pulled up, its guide rod withdraws from the guide rod positioning hole.

[0018] A construction method for a multi-hole span deck type continuous solid-web arch bridge formwork support system, the construction method comprising the following steps:

[0019] Step 1: Construction preparation process;

[0020] Step 2: During the foundation treatment process, the poor soil within the support range is back-excavated and replaced, and the backfill is mechanically compacted in layers. The overall foundation quality is tested for foundation bearing capacity using a standard penetration test. The bearing capacity must be no less than 120Kpa before entering the next process. The base layer is constructed using 40cm, 4% gray soil according to the specifications. After compaction, a 20cm thick C20 concrete surface layer is poured. The top elevation of the foundation is controlled at the design elevation of the riverbed of 2.5m. The concrete surface layer is sloped from south to north with a slope of 1% for drainage. Drainage ditches and water collection wells are constructed on the north side to promptly pump out the surface water collected on the ground to ensure the stability of the foundation during the support construction and prevent the treated foundation from being soaked by water.

[0021] Step 3: During the scaffolding process, the main column and the auxiliary column are spliced ​​together to form a support column according to the actual situation on site, and then the support column, the adjustment seat, the connecting seat, and the connecting beam are fixedly installed to form a top plate formwork frame;

[0022] Step 4: Preloading the support. After the top plate formwork and bottom formwork are laid, preloading the formwork and template within the preloading range is performed using preloading blocks. Loading is divided into four levels: 60%, 80%, 100%, and 120% of the design load. The elevation of each measuring point before and after loading is measured. During the support calculation in the structural calculation, the strength, rigidity, and stability of the template and support meet the design requirements. Analysis of the support system's loading, preloading, and unloading settlement observation data further proves that this support system meets the requirements.

[0023] Step 5: During the formwork installation process, the arch plate bottom formwork uses 15mm thick bamboo plywood, the formwork size is 1220*2440mm, the arch plate bottom formwork and the long sides of the wing plate are arranged along the bridge direction, and the outer formwork uses wood board;

[0024] Step 6: During the steel bar production and installation process, the longitudinal reinforcement of ordinary steel bars shall be extended by lap welding. The double-sided weld length shall not be less than 5d, and the single-sided weld length shall not be less than 10d. The number of joints in the same section shall not exceed 50% of the number of steel bars. The transverse beam reinforcement shall be tied or welded to the beam section.

[0025] Step 7: Concrete pouring: pour concrete symmetrically and evenly from the arch foot to the full width of the arch crown. It should be completed before the initial setting of the arch foot concrete. The deformation of the arch crown should be closely observed during the pouring process. To prevent the arch crown from warping up, the arch crown section can be pre-loaded.

[0026] Step 8: Formwork and support removal process. When the concrete strength reaches the requirement, the formwork and support structure can be removed.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. By configuring the upper support column of the multi-span top-decker continuous solid-web arch bridge formwork support system to consist of a main column and a secondary column, it is easier for workers to adjust the height of the main column, thereby facilitating the adjustment of the installation height of the connecting beam. The height adjustment accuracy of the connecting beam can be further ensured by screwing the adjustment seat, thereby improving the convenience of subsequent construction.

[0029] 2. An auxiliary pushing member composed of a bottom plate, a slider, a connecting plate, a top plate, a guide rod, a reset spring and a pull plate is provided, and a guide rod positioning hole is opened on the upper side of the positioning ring, so that the positioning ring can be pushed by embedding the guide rod into the guide rod positioning hole, and the guide rod can only allow the positioning ring to move within a certain range, so that while achieving the limit, the angle of the positioning ring can be adjusted, thereby realizing the disassembly and positioning of the connecting beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 A half-section view of the present invention;

[0032] Figure 3 This is a schematic diagram of the main column structure of the present invention;

[0033] Figure 4 A half-section view of the connecting seat of the present invention;

[0034] Figure 5 for Figure 4 A schematic diagram of the structure at center A;

[0035] Figure 6 This is a schematic diagram of the structure of the adjustment seat of the present invention;

[0036] Figure 7 This is a schematic diagram of the positioning ring structure of the present invention;

[0037] Figure 8 This is a schematic diagram of the connecting beam structure of the present invention;

[0038] Figure 9 This is a schematic diagram of the auxiliary pusher structure of the present invention;

[0039] Figure 10 It is a construction process flow chart of the present invention.

[0040] In the figure: support column 1, adjustment seat 2, connecting seat 3, connecting beam 4, main column 5, auxiliary column 6, docking tube 7, adjustment seat mounting rod 8, docking rod 9, pin groove 10, pin hole 11, connecting spring 12, locating pin 13, secondary guide groove 14, secondary guide protrusion 15, primary guide groove 16, primary guide protrusion 17, auxiliary pop-up spring 18, positioning rod hole 19, sleeve 20, annular seat 21, positioning seat 22, positioning rod 23, annular groove 24, connecting groove 25, slide groove 26, positioning hole 27, positioning ring 28, guide rod positioning hole 29, auxiliary pushing member 30, bottom plate 31, slider 32, connecting plate 33, top plate 34, guide rod 35, return spring 36, pull plate 37, spring connecting seat 38, annular plate 39, support spring 40, bump groove 41, bump 42, spring groove 43. DETAILED DESCRIPTION

[0041] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," "horizontal," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "one," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0044] For the purpose of simplicity and illustration, the principles of the embodiments are described primarily with reference to examples. In the following description, many specific details are provided to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures are not described in detail to avoid unnecessarily obscuring the understanding of these embodiments. In addition, all embodiments may be used in combination with each other.

[0045] See also Figure 1-9 The present invention provides the following four preferred embodiments:

[0046] Example 1

[0047] A multi-porous span-supported continuous solid-web arch bridge formwork support system, the multi-porous span-supported continuous solid-web arch bridge formwork support system includes a support column 1, an adjustment seat 2, a connecting seat 3 and a connecting beam 4, the support column 1 is composed of a main column 5 and a secondary column 6, the main column 5 is composed of a butt joint tube 7, an adjustment seat mounting rod 8 and a butt joint rod 9, an external thread structure is provided on the outer wall of the adjustment seat mounting rod 8, and a primary guide groove 16 is provided on the outer wall of the butt joint tube 7, the adjustment seat 2 is screwed and installed on the adjustment seat mounting rod 8, the connecting seat 3 is sleeved and installed on the butt joint tube 7, and the connecting seat 3 is composed of a sleeve 20, an annular seat 21 and a positioning seat 22, and the connecting beam 4 is butt jointed with the positioning seat 22.

[0048] A pin hole 11 is provided on the side wall of the docking tube 7, and there are four pin holes 11 in a cross shape. A pin groove 10 is provided on the side wall of the docking rod 9, and the bottom of the pin groove 10 is connected to a positioning pin 13 through a connecting spring 12. The upper end of the sub-column 6 has the same structure as the docking tube 7, and the lower end of the sub-column 6 has the same structure as the docking rod 9. A secondary guide groove 14 is provided on the inner side wall of the docking tube 7, and a secondary guide protrusion 15 is integrally formed on the outer side wall of the docking rod 9. The secondary guide protrusion 15 is arranged corresponding to the secondary guide groove 14, and when the secondary guide protrusion 15 is fully inserted into the secondary guide groove 14, its pin hole 11 is aligned with the pin groove 10, and when the connecting spring 12 is in the reset state, the end of the positioning pin 13 is inserted into the pin hole 11.

[0049] The connection between the secondary columns 6 and the secondary columns 6, and between the main columns 5 and the secondary columns 6, is achieved by inserting the docking rods 9 into the docking tubes 7 for docking, and an auxiliary pop-up spring 18 is provided at the bottom of the docking tube 7. By setting the upper support column 1 of the porous span-supported continuous solid-web arch bridge formwork support system to be composed of a combination of the main column 5 and the secondary column 6, it is convenient for the staff to adjust the height of the main column 5, thereby facilitating the adjustment of the installation height of the connecting beam 4, and by screwing the adjustment seat 2, the accuracy of the adjustment of the height of the connecting beam 4 is further guaranteed, thereby improving the convenience of subsequent construction.

[0050] Example 2

[0051] On the basis of Example 1, the sleeve 20, the annular seat 21, and the positioning seat 22 are integrally formed, and a first-level guide protrusion 17 is integrally formed on the inner wall of the sleeve 20 near the upper end. The first-level guide protrusion 17 is arranged corresponding to the first-level guide groove 16, and the first-level guide protrusion 17 is movably arranged in the first-level guide groove 16, and the first-level guide groove 16 and the second-level guide groove 14 are staggered.

[0052] An annular plate 39 is welded to the outer wall of the connecting tube 7 on the main column 5, and a spring groove 43 is opened on the sleeve 20. A support spring 40 is fixedly connected to the bottom of the spring groove 43, and the upper end of the support spring 40 is welded to the annular plate 39.

[0053] A positioning rod hole 19 is provided on the upper surface of the adjustment seat 2, and a positioning rod 23 is welded to the lower surface of the sleeve 20. The positioning rod 23 and the positioning rod hole 19 are arranged in a circle with equal circumference, and the positioning rod 23 and the positioning rod hole 19 are arranged correspondingly, and the positioning rod 23 is embedded in the positioning rod hole 19. Through the supporting action of the support spring 40 and the guiding action formed by the first-level guide protrusion 17 in the first-level guide groove 16, and through the positioning rod 23 being embedded in the positioning rod hole 19, a locking action is formed on the adjustment seat 2 to prevent the adjustment seat 2 from deflecting, thereby ensuring the positioning stability of the connecting beam 4.

[0054] There are four positioning seats 22 in a cross shape, and an annular groove 24 is provided on the positioning seat 22, and a slide groove 26 is provided on one of the positioning seats 22, and a group of slide grooves 26 are provided, and a connecting groove 25 is provided between the slide grooves 26 on both sides, and the connecting groove 25 is connected to the annular groove 24. A positioning ring 28 is movably provided in the annular groove 24, and a connector is integrally formed at the end of the connecting beam 4. When the connector is actually docked, it is inserted into the gap between the positioning seats 22, and a positioning hole 27 is provided on the connector.

[0055] A bump groove 41 is provided on the edge of the positioning seat 22, and a bump 42 is welded to the edge of the connecting head at the end of the connecting beam 4. The bump 42 is consistent with the size of the bump groove 41, and when the bump 42 is embedded in the bump groove 41, its positioning hole 27 is set corresponding to the annular groove 24, and the positioning ring 28 is set through the positioning hole 27.

[0056] Example 3

[0057] On the basis of embodiment 2, an auxiliary pushing member 30 is movably provided in the connecting groove 25, and the auxiliary pushing member 30 is composed of a bottom plate 31, a slider 32, a connecting plate 33, a top plate 34, a guide rod 35, a return spring 36 and a pull plate 37. The bottom plate 31, the slider 32, the connecting plate 33 and the top plate 34 are welded together, and the slider 32 is slidably provided in the slide groove 26, the guide rod 35 is movably provided on the bottom plate 31 and the top plate 34, and a spring connecting seat 38 is welded on the side wall of the guide rod 35, the return spring 36 is movably sleeved on the guide rod 35, and the two ends of the return spring 36 are fixedly connected to the top plate 34 and the spring connecting seat 38 respectively, the pull plate 37 is welded to the upper end of the guide rod 35, and a guide rod positioning hole 29 is provided on the upper side of the positioning ring 28, and twelve guide rod positioning holes 29 are provided on the circumference, and the connecting rod 35 is connected. The length of the connecting groove 25 is greater than the spacing between adjacent guide rod positioning holes 29, and when the reset spring 36 is in the reset state, the end of the guide rod 35 is embedded in the guide rod positioning hole 29, and when the guide rod 35 is pulled up, the guide rod 35 withdraws from the guide rod positioning hole 29. By providing an auxiliary pushing member 30 composed of a bottom plate 31, a slider 32, a connecting plate 33, a top plate 34, a guide rod 35, a reset spring 36 and a pulling plate 37, and by opening a guide rod positioning hole 29 on the upper side of the positioning ring 28, the guide rod 35 is embedded in the guide rod positioning hole 29 to push the positioning ring 28, and the guide rod 35 can allow the positioning ring 28 to move only within a certain range, so that while achieving limitation, the angle of the positioning ring 28 can be adjusted, thereby achieving disassembly and positioning of the connecting beam 4.

[0058] Example 4

[0059] Based on the third embodiment, a construction method of a multi-hole span deck continuous solid-web arch bridge formwork support system is provided. The construction method of the multi-hole span deck continuous solid-web arch bridge formwork support system comprises the following steps:

[0060] Step 1: Construction preparation process;

[0061] Step 2: During the foundation treatment process, the poor soil within the support range is back-excavated and replaced, and the backfill is mechanically compacted in layers. The overall foundation quality is tested for foundation bearing capacity using a standard penetration test. The bearing capacity must be no less than 120Kpa before entering the next process. The base layer is constructed using 40cm, 4% gray soil according to the specifications. After compaction, a 20cm thick C20 concrete surface layer is poured. The top elevation of the foundation is controlled at the design elevation of the riverbed of 2.5m. The concrete surface layer is sloped from south to north with a slope of 1% for drainage. Drainage ditches and water collection wells are constructed on the north side to promptly pump out the surface water collected on the ground to ensure the stability of the foundation during the support construction and prevent the treated foundation from being soaked by water.

[0062] Step 3: During the scaffolding process, the main column 5 and the auxiliary column 6 are spliced ​​together to form the support column 1 according to the actual situation on site, and then the support column 1, the adjustment seat 2, the connecting seat 3, and the connecting beam 4 are fixed and installed to form the top plate formwork;

[0063] Step 4: Preloading the support. After the top plate formwork and bottom formwork are laid, preloading the formwork and template within the preloading range is performed using preloading blocks. Loading is divided into four levels: 60%, 80%, 100%, and 120% of the design load. The elevation of each measuring point before and after loading is measured. During the support calculation in the structural calculation, the strength, rigidity, and stability of the template and support meet the design requirements. Analysis of the support system's loading, preloading, and unloading settlement observation data further proves that this support system meets the requirements.

[0064] Step 5: During the formwork installation process, the arch plate bottom formwork uses 15mm thick bamboo plywood, the formwork size is 1220*2440mm, the arch plate bottom formwork and the long sides of the wing plate are arranged along the bridge direction, and the outer formwork uses wood board;

[0065] Step 6: During the steel bar production and installation process, the longitudinal reinforcement of ordinary steel bars shall be extended by lap welding. The double-sided weld length shall not be less than 5d, and the single-sided weld length shall not be less than 10d. The number of joints in the same section shall not exceed 50% of the number of steel bars. The transverse beam reinforcement shall be tied or welded to the beam section.

[0066] Step 7: Concrete pouring: pour concrete symmetrically and evenly from the arch foot to the full width of the arch crown. It should be completed before the initial setting of the arch foot concrete. The deformation of the arch crown should be closely observed during the pouring process. To prevent the arch crown from warping up, the arch crown section can be pre-loaded.

[0067] Step 8: Formwork and support removal process. When the concrete strength reaches the requirement, the formwork and support structure can be removed.

[0068] Although the above describes the illustrative specific implementation methods of the present application so that those skilled in the art can understand the present application, the present application is not limited to the scope of the specific implementation methods. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations based on the concept of the present application are protected.

Claims

1. A multi-span deck continuous solid arch bridge formwork support system, characterized by: The multi-hole span top-decker continuous solid-web arch bridge formwork support system includes: A support column (1), wherein the support column (1) is composed of a main column (5) and a secondary column (6), wherein the main column (5) is composed of a butt joint tube (7), an adjustment seat mounting rod (8) and a butt joint rod (9), an outer wall of the adjustment seat mounting rod (8) is provided with an external thread structure, and an outer wall of the butt joint tube (7) is provided with a primary guide groove (16); An adjustment seat (2), wherein the adjustment seat (2) is screwed onto an adjustment seat mounting rod (8); A connecting seat (3), wherein the connecting seat (3) is sleeved and mounted on the butt-jointed pipe (7), and the connecting seat (3) is composed of a sleeve (20), an annular seat (21) and a positioning seat (22); A connecting crossbeam (4), wherein the connecting crossbeam (4) is docked with the positioning seat (22); A pin hole (11) is provided on the side wall of the butt joint tube (7), and four pin holes (11) are arranged in a cross shape. A pin groove (10) is provided on the side wall of the butt joint rod (9), and the bottom of the pin groove (10) is connected to a positioning pin (13) via a connecting spring (12). The upper end of the auxiliary column (6) has the same structure as the butt joint tube (7), and the lower end of the auxiliary column (6) has the same structure as the butt joint rod (9). The inner side wall of the butt joint tube (7) is provided with a pin hole (11). There is a secondary guide groove (14), and a secondary guide protrusion (15) is integrally formed on the outer side wall of the docking rod (9), and the secondary guide protrusion (15) is arranged corresponding to the secondary guide groove (14), and when the secondary guide protrusion (15) is fully inserted into the secondary guide groove (14), its pin shaft hole (11) is aligned with the pin shaft groove (10), and when the connecting spring (12) is in a reset state, the end of its positioning pin (13) is inserted into the pin shaft hole (11); The connection between the auxiliary columns (6) and the auxiliary columns (6), and between the main column (5) and the auxiliary column (6), is achieved by inserting a docking rod (9) into a docking tube (7), and an auxiliary pop-up spring (18) is provided at the bottom of the docking tube (7); The sleeve (20), the annular seat (21), and the positioning seat (22) are integrally formed, and a first-level guide protrusion (17) is integrally formed on the inner side wall of the sleeve (20) near the upper end, the first-level guide protrusion (17) is arranged corresponding to the first-level guide groove (16), and the first-level guide protrusion (17) is movably arranged in the first-level guide groove (16), and the first-level guide groove (16) and the second-level guide groove (14) are staggered. An annular plate (39) is welded to the outer wall of the butt tube (7) on the main column (5), a spring groove (43) is provided on the sleeve (20), a support spring (40) is fixedly connected to the bottom of the spring groove (43), and the upper end of the support spring (40) is welded to the annular plate (39); A positioning rod hole (19) is provided on the upper surface of the adjustment seat (2), and a positioning rod (23) is welded to the lower surface of the sleeve (20), wherein the positioning rod (23) and the positioning rod hole (19) are arranged in a circle with equal circumference, and the positioning rod (23) and the positioning rod hole (19) are arranged correspondingly, and the positioning rod (23) is embedded in the positioning rod hole (19); The positioning seats (22) are provided in four cross shapes, and an annular groove (24) is provided on the positioning seats (22), and a slide groove (26) is provided on one of the positioning seats (22), and a group of slide grooves (26) are provided, and a connecting groove (25) is provided between the slide grooves (26) on both sides, and the connecting groove (25) is connected to the annular groove (24), and a positioning ring (28) is movably provided in the annular groove (24), and a connector is integrally formed at the end of the connecting beam (4), and when the connector is actually docked, it is inserted into the gap between the positioning seats (22), and a positioning hole (27) is provided on the connector; The edge of the positioning seat (22) is provided with a protrusion groove (41), and the edge of the connecting head of the end of the connecting beam (4) is welded with a protrusion (42), the size of the protrusion (42) and the protrusion groove (41) are consistent, and when the protrusion (42) is embedded in the protrusion groove (41), its positioning hole (27) is arranged corresponding to the annular groove (24), and the positioning ring (28) is arranged through the positioning hole (27); An auxiliary pusher (30) is movably arranged in the connecting groove (25), and the auxiliary pusher (30) is composed of a bottom plate (31), a slider (32), a connecting plate (33), a top plate (34), a guide rod (35), a return spring (36) and a pull plate (37). The bottom plate (31), the slider (32), the connecting plate (33) and the top plate (34) are welded together, and the slider (32) is slidably arranged in the sliding groove (26). The guide rod (35) is movably arranged on the bottom plate (31) and the top plate (34), and a spring connecting seat (38) is welded on the side wall of the guide rod (35). The return spring (36) is movably sleeved on the bottom plate (31) and the top plate (34). The guide rod (35) is fixedly connected to the top plate (34) and the spring connecting seat (38) at both ends of the return spring (36), and the pull plate (37) is welded to the upper end of the guide rod (35). The upper side of the positioning ring (28) is provided with a guide rod positioning hole (29). Twelve guide rod positioning holes (29) are provided on the circumference of the guide rod positioning holes (29). The length of the connecting groove (25) is greater than the spacing between adjacent guide rod positioning holes (29). When the return spring (36) is in the reset state, the end of the guide rod (35) is embedded in the guide rod positioning hole (29), and when the guide rod (35) is pulled up, the guide rod (35) withdraws from the guide rod positioning hole (29).

2. A construction method for a multi-porous span deck continuous solid-web arch bridge formwork support system according to claim 1, characterized in that: The construction method of the porous span top-decker continuous solid-web arch bridge formwork support system comprises the following steps: Step 1: Construction preparation process; Step 2: During the foundation treatment process, the poor soil within the support range is back-excavated and replaced, and the backfill is mechanically compacted in layers. The overall foundation quality is tested for foundation bearing capacity using a standard penetration test. The bearing capacity must be no less than 120Kpa before entering the next process. The base layer is constructed with 40cm, 4% lime soil according to the specifications. After compaction, a 20cm thick C20 concrete surface layer is poured. The foundation top elevation is controlled at the riverbed design elevation of 2.5m. The concrete surface layer is sloped from south to north with a slope of 1% for drainage. Drainage ditches and water collection wells are constructed on the north side to promptly pump out the surface water collected on the ground to ensure the stability of the foundation during the support construction and prevent the treated foundation from being soaked by water. Step 3: The process of erecting the support frame, in which the main column (5) and the auxiliary column (6) are spliced ​​together according to the actual situation on site to form the support column (1), and then the support column (1), the adjustment seat (2), the connecting seat (3), and the connecting beam (4) are fixedly installed to form the top plate formwork frame; Step 4: Preloading of the support. After the top plate formwork and bottom formwork are laid, preloading is performed on the formwork and template within the preloading range. When loading with preloading blocks, four loading levels are applied, namely 60%, 80%, 100%, and 120% of the design load. The elevation of each measuring point before and after loading is measured. During the support calculation in the structural calculation, the strength, rigidity, and stability of the template and support meet the design requirements. The analysis of the loading, preloading, and unloading settlement observation data of the support system further proves that this support system meets the requirements. Step 5: During the formwork installation process, the arch plate bottom formwork uses 15mm thick bamboo plywood, the formwork size is 1220*2440mm, the arch plate bottom formwork and the long sides of the wing plate are arranged along the bridge direction, and the outer formwork uses wood board; Step 6: During the steel bar production and installation process, the longitudinal reinforcement of ordinary steel bars shall be extended by lap welding. The double-sided weld length shall not be less than 5d, and the single-sided weld length shall not be less than 10d. The number of joints in the same section shall not exceed 50% of the number of steel bars. The transverse beam reinforcement shall be tied or welded to the beam section. Step 7: Concrete pouring: pour the concrete symmetrically and evenly from the arch foot to the full width of the arch crown. It should be completed before the initial setting of the arch foot concrete. The deformation of the arch crown should be closely observed during the pouring process. To prevent the arch crown from warping up, pre-load the arch crown section. Step 8: Formwork and support removal process. When the concrete strength reaches the requirement, the formwork and support structure can be removed.

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