Hanging basket system for symmetrical pouring of variable cross-section stack box aqueduct cantilever

Abstract

The invention discloses a hanging basket system for symmetrical pouring of cantilevers of a variable-cross-section stacked box aqueduct in the technical field of stacked box aqueduct pouring. The hanging basket system comprises a stacked box girder body, an upper truss is arranged on the edge of the upper end of the stacked box girder body in the pouring direction, the upper truss is provided with a suspension arm extending downwards, and a pouring hanging bracket assembly is arranged at the lower end of the suspension arm; the pouring supporting effect of the bottom of the lower box is achieved through stable anchoring of the bottom formwork, the supporting frame which is relatively fixed and matched with the lower box is arranged in the lower box, the supporting cantilever extends in the pouring direction through the supporting frame, and the supporting cantilever is used for bearing the bracket, so that the pouring supporting structure of the whole upper box is formed; the suspension arm is simultaneously connected in series with the bottom template and the support cantilever, so that the integrity is ensured; the whole structure can guarantee the pouring process of the variable cross-section stacked box aqueduct, has good supporting strength and connecting rigidity, and can effectively achieve the pouring process from stacked boxes to short stacked boxes and then to single boxes.

Description

Technical Field

[0001] The invention relates to the technical field of stacked box aqueduct casting, in particular to a hanging basket system for cantilever symmetrical casting of a stacked box aqueduct with variable cross-section. Background Art

[0002] The PC continuous rigid frame bridge is a representative of the largest span beam bridge. The rigid frame aqueduct absorbs the characteristics of this type of bridge and adopts a variable-section stacked box beam structure. The stacked box structure with water transmission from above and load bearing from below realizes the combination of water transmission and load bearing.

[0003] Cantilever symmetrical casting is a unique construction method for PC continuous rigid frame bridges, which creates a large span for beam bridges. First, the bridge piers are constructed, and the construction of block 0 is completed using brackets on the top of the piers. With block 0 as the fulcrum, a hanging basket is installed on each side, and the formwork, steel bars and concrete of block 1 to be cast are lifted using the hanging baskets. After the concrete is poured and cured on the hanging baskets, the prestressing is tensioned to complete the construction of block 1. The hanging baskets move forward symmetrically, each pushing a beam section, similar to the construction of block 2. This cycle is repeated until the bridge is closed.

[0004] The cantilever symmetrical casting hanging basket system is usually made of steel structure, and there are various forms such as triangular hanging basket, diamond hanging basket, etc. The existing hanging basket is generally used for cantilever symmetrical casting of a single box, but in the casting process of variable-section stacked box aqueduct, there are problems of insufficient bearing capacity and structural rigidity. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the technical problem to be solved by the present invention is: how to improve the supporting performance and rigidity of the variable-section stacked box aqueduct casting hanging basket system.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A hanging basket system for cantilever symmetrical casting of a variable-section stacked box aqueduct, comprising a continuous variable-section beam body, an upper truss is arranged on one side of the upper end of the continuous variable-section beam body along the casting direction, the upper truss is arranged with a first boom extending downward, and a casting hanger assembly is arranged at the lower end of the first boom; the continuous variable-section beam body comprises a single box beam and a stacked box beam, the stacked box beam comprises an upper box and a lower box, the cross-sectional area of ​​the inner cavity of the lower box gradually decreases from the middle to both sides until the volume is 0 at a preset position, and then the single box beam is transitioned to the single box beam, the single box beam comprises an upper box and no lower box; when in a casting state at the stacked box beam position, the casting hanger assembly comprises a support frame with adjustable height arranged in the lower box, the lower end and the upper end of the support frame respectively abut against the top wall and the bottom wall of the inner cavity of the lower box; the support frame A support suspension is provided on the side facing the casting direction of the stacked box beam body, and a bracket is provided on the upper end of the support suspension, which is flush with the top wall of the inner cavity of the lower box, and the bracket is used to support the casting template on the top of the lower box, and the end of the support suspension away from the stacked box beam body is detachably connected to the first boom, and the support suspension is detachably connected to the second boom extending vertically downward, and the lower end of the second boom is detachably provided with a bottom template, and the first boom and the second boom are detachably connected; the end of the bottom template away from the second boom is anchored to the bottom of the lower box body; when in the single box beam position casting state, the casting hanger assembly includes a bottom template detachably connected to the lower end of the first boom, and the end of the bottom template away from the first boom is anchored to the bottom of the upper box body.

[0008] Furthermore, it also includes an upper box casting formwork structure, which includes a U-shaped inner mold and an abutment frame, the upper end of the abutment frame is connected to the upper truss and the lower end abuts against the inner wall of the U-shaped inner mold.

[0009] Furthermore, the first boom and the second boom are both arranged in multiple numbers corresponding to each other, the multiple first booms are evenly arranged laterally along the upper truss, and the supporting suspension is detachably connected to the first boom and the second boom at corresponding positions.

[0010] Furthermore, the support frame includes a plurality of vertical steel columns, and the upper and lower ends of the vertical steel columns are respectively provided with ground feet and ceiling supports, the ground feet are used to abut against the bottom wall of the lower box cavity, and the ceiling supports are used to abut against the top wall of the lower box cavity.

[0011] Furthermore, the bottom template and the bottom of the stacked box beam body are provided with multiple anchor points.

[0012] Furthermore, the supporting suspension is provided with a mounting groove, a through-pin structure is passed through the mounting groove, and the through-pin structure is used for detachably connecting the first suspension arm and the second suspension arm.

[0013] Furthermore, the above-mentioned mounting groove includes a vertical mounting groove and a horizontal mounting groove, the above-mentioned through-pin structure includes a vertical rod, the upper and lower ends of the above-mentioned vertical rod are respectively connected to the above-mentioned first suspension arm and the above-mentioned second suspension arm, the above-mentioned vertical rod passes through the above-mentioned vertical mounting groove, a horizontal rod is passed through the middle of the above-mentioned vertical rod, the above-mentioned cross rod passes through the above-mentioned cross mounting groove, the above-mentioned vertical rod and the above-mentioned cross rod are provided with a first key groove and a second key groove which are interconnected at corresponding positions, the upper and lower ends of the above-mentioned vertical rod are respectively provided with a first bolt member for abutting the upper and lower ends of the above-mentioned support suspension, and the two ends of the above-mentioned cross rod are respectively provided with a second bolt member for abutting the outer walls on both sides of the above-mentioned vertical rod.

[0014] Furthermore, it also includes a stress monitoring device for detecting the hanging basket system, the stress monitoring device includes a plurality of deflection sensors and a plurality of stress sensors, the plurality of deflection sensors are respectively arranged on the upper truss, the support suspension and the bottom formwork, and the plurality of stress sensors are respectively arranged on the anchoring places of the upper truss, the boom, the support frame, the support suspension and the bottom formwork and the stacked box beam body.

[0015] Furthermore, it also includes an environmental monitoring device for monitoring the external environment.

[0016] The beneficial effects of the present invention are:

[0017] (1) When the stacked box beam is in the casting state, the casting support function of the bottom of the lower box is realized by the stable anchoring of the bottom formwork, and the support frame is set in the lower box and relatively fixedly matched with the lower box, and the support suspension is extended in the casting direction through the support frame. The support suspension is used to support the bracket, thereby forming a casting support structure for the entire upper box, and the first boom and the second boom are simultaneously connected in series with the bottom formwork and the support suspension to ensure integrity. The entire structure can ensure the casting process of the variable-section stacked box aqueduct, has good support strength and connection stiffness, and can effectively realize the casting process from stacked boxes to short stacked boxes and then to single boxes.

[0018] (2) By setting up a support frame with adjustable height, it is ensured that the structural slot size of the lower box can be adaptively adjusted during the gradual change process to ensure the stability of the support.

[0019] (3) The first boom and the supporting suspension are detachable, the second boom and the first boom are detachable, and the second boom and the bottom formwork are detachable, so as to ensure that when casting the transition stage from the stacked box girder to the single box girder, the supporting frame, the supporting suspension and the bracket can be disassembled as a whole, and the lower end of the first boom is directly connected to the bottom formwork to realize the supporting casting of the upper box structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 The present invention Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a schematic diagram of the through pin connection relationship of the present invention;

[0023] Figure 4 It is a schematic diagram of the through pin structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the distribution position of the stress monitoring device of the present invention;

[0025] Figure 6 It is a schematic diagram of the upper box casting template structure of the present invention;

[0026] Marked in the figure are, 1-upper truss, 2-first boom, 3-bottom formwork, 4-vertical steel column, 5-ground anchor, 6-sky support, 7-support suspension, 8-bracket, 9-second boom, 10-installation groove, 11-vertical rod, 12-cross rod, 13-first bolt member, 14-second bolt member, 15-U-shaped inner mold, 16-abutment frame, 17-lower joint, 100-upper box, 200-stress sensor, 300-deflection sensor, 400-lower box. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings.

[0028] according to Figure 1 , Figure 2As shown, the embodiment of the present application proposes a hanging basket system for cantilever symmetrical casting of a variable-section stacked box aqueduct, comprising a continuous variable-section beam body, an upper truss 1 is arranged on one side of the upper end of the continuous variable-section beam body along the casting direction, the upper truss 1 is arranged with a first boom 2 extending downward, and a casting hanger assembly is arranged at the lower end of the first boom 2; the continuous variable-section beam body comprises a single box beam and a stacked box beam, the stacked box beam comprises an upper box 100 and a lower box 400, the cross-sectional area of ​​the inner cavity of the lower box 400 gradually decreases from the middle to both sides until the volume is 0 at a preset position, and then the single box beam is transitioned to the single box beam, the single box beam comprises an upper box 100 and no lower box 400; when in a casting state at the stacked box beam position, the casting hanger assembly comprises a support frame with adjustable height arranged in the lower box 400, the lower end and the upper end of the support frame respectively abut against the top wall and the bottom wall of the inner cavity of the lower box 400; A support suspension 7 is provided on the side of the support frame facing the casting direction of the above-mentioned stacked box beam body, and a bracket 8 flush with the top wall of the inner cavity of the above-mentioned lower box 400 is provided on the upper end of the above-mentioned support suspension 7, and the above-mentioned bracket 8 is used to support the casting template on the top of the lower box 400, and the end of the above-mentioned support suspension 7 away from the above-mentioned stacked box beam body is detachably connected to the above-mentioned first boom 2, and the above-mentioned support suspension 7 is detachably connected to the second boom 9 extending vertically downward, and the lower end of the above-mentioned second boom 9 is detachably provided with a bottom template 3, and the above-mentioned first boom 2 and the above-mentioned second boom 9 are detachably connected; the end of the above-mentioned bottom template 3 away from the above-mentioned second boom 9 is anchored at the bottom of the above-mentioned lower box 400 body; when in the single box beam position casting state, the above-mentioned casting hanger assembly includes a bottom template 3 detachably connected to the lower end of the above-mentioned first boom 2, and the end of the above-mentioned bottom template 3 away from the above-mentioned first boom 2 is anchored at the bottom of the above-mentioned upper box 100 body.

[0029] During the actual pouring construction process, as construction proceeds toward both sides, the internal dimensions of the lower box 400 gradually decrease, and the height of the support frame needs to be continuously adjusted to ensure that the support frame can be stably connected to the internal space of the lower box 400 that has been completed in the previous pouring section to form a stable support system. When the pouring process reaches the transition section between stacked boxes and single boxes, the internal volume of the lower box 400 in the previous pouring section approaches zero. At this time, the first boom 2 and the support suspension 7 are disassembled, the second boom 9 and the bottom formwork 3 are disassembled, the first boom 2 and the bottom formwork 3 are installed, and the support frame, the support suspension 7 and the bracket 8 are removed as a whole. At this time, the weight of the single-box structure is reduced, and the bottom formwork 3 can stably support the pouring system, ensuring a stable transition from stacked boxes to single-box pouring.

[0030] First of all, it should be stated that the pouring support function of the bottom of the lower box 400 is achieved by the stable anchoring of the bottom formwork 3, and the support frame is arranged in the lower box 400 and relatively fixedly matched with the lower box 400, and the support suspension 7 is extended in the pouring direction through the support frame. The support suspension 7 is used to support the bracket 8, thereby forming a pouring support structure for the entire upper box 100, and the first boom 2 and the second boom 9 are simultaneously connected in series with the bottom formwork 3 and the support suspension 7 to ensure the integrity. The whole structure can ensure the pouring process of the variable-section stacked box aqueduct, has good supporting strength and connection stiffness, and can effectively realize the pouring process from stacked boxes to short stacked boxes and then to single boxes. The above-mentioned support frame, support suspension 7 and bracket 8 can ensure that the thick middle partition with variable cross-section is well supported, so that the upper hanging basket does not need to pass through the middle partition, which is more conducive to preventing the middle partition from cracking.

[0031] The above-mentioned stacked box girder body is specifically a completed casting section. In this field, a scaffold-free construction method is adopted for rigid frame bridge structures. The No. 0 block on the pier is used as support, and a hanging basket is used to support the concrete to be cast. The beam sections are gradually cast symmetrically on both sides of the No. 0 block. After the curing concrete is cast, prestressing is implemented until the joint is closed. The initial stacked box girder body is the No. 0 block. After a subsequent casting section is completed, the newly completed casting section is used as the stacked box girder body. As the casting progresses, the stacked box girder body gradually extends to both sides.

[0032] The upper truss 1 can be an existing triangular truss or a diamond truss. The upper truss 1 uses the anchor point at the upper end of the stacked box beam body as a fulcrum to achieve a stable lifting effect on the casting hanger assembly. Specifically, the first boom 2 extends vertically downward, and the lower end of the first boom 2 can be detachably connected to the support suspension 7, and the end of the second boom 9 can be detachably connected to the bottom formwork 3 to form an integrated lifting structure; and the support suspension 7 specifically uses the internal molding space of the lower box 400 as a fulcrum to further support the bracket 8. This integrated comprehensive support and lifting structure can ensure stability and sufficient rigidity during the stacked box casting process, and the support plate cantilever and the support frame do not need to be directly inserted into the middle partition of the stacked box beam body to avoid cracks or damage to the middle partition and affect the overall stability.

[0033] The first boom 2 and the second boom 9 are both correspondingly arranged in plurality, and the plurality of first booms 2 are evenly arranged laterally along the upper truss 1 to ensure that the upper truss 1 has sufficient pulling force on the lower casting support structure to improve stability.

[0034] Specifically, the support frame includes a plurality of evenly arranged vertical steel columns 4, and the upper and lower ends of the vertical steel columns 4 are respectively provided with footings 5 ​​and sky supports 6, the footings 5 ​​are used to abut the bottom wall of the inner cavity of the lower box 400, and the sky supports 6 are used to abut the top wall of the inner cavity of the lower box 400, and the height of the footings 5 ​​and sky supports 6 can be achieved through the corresponding bolt adjustment mechanism to achieve the purpose of stably abutting the bottom wall and the top wall of the lower box 400, and it is convenient to disassemble the support frame after the pouring is completed, so as to facilitate the subsequent pouring process; the specific height size of the vertical steel column 4 is adapted to the internal height of the transition section between the lower box 400 and the stacked box, so as to ensure that it can adapt to the entire pouring process, and the footings 5 ​​and sky supports 6 can be threadedly connected to the two ends of the vertical steel column 4, and the abutting surfaces of the footings 5 ​​and sky supports 6 can adjust the angle to ensure that they are fully fitted and abutted with the internal top and bottom walls of the lower box 400, thereby improving the support stability.

[0035] In order to further increase the connection stability of the bottom plate template, the bottom template 3 and the bottom of the stacked box beam body are provided with multiple anchor points, and the multiple anchor points are sequentially spaced in the length direction of the stacked box beam body.

[0036] like Figure 3 , Figure 4 As shown, the support suspension 7 is provided with a mounting groove 10, and a through-pin structure is passed through the mounting groove 10. The through-pin structure is used to detachably connect the first suspension arm 2 and the second suspension arm 9. Specifically, the mounting groove 10 includes a vertical mounting groove 10 and a horizontal mounting groove 10. A vertical rod 11 is passed through the vertical mounting groove 10. The upper and lower ends of the vertical rod 11 are respectively detachably connected to the first suspension arm 2 and the second suspension arm 9. A cross bar 12 is passed through the middle of the vertical rod 11, and the cross bar 12 penetrates the horizontal mounting groove 10; the corresponding positions of the vertical rod 11 and the cross bar 12 are provided with a first keyway and a second keyway that are interconnected (as shown in the figure) Not marked), the first keyway and the second keyway are used to align and insert the corresponding key pin structure to achieve the positioning effect of the relative position of the vertical rod 11 and the horizontal rod 12; the upper and lower ends of the above-mentioned vertical rod 11 are threadedly connected with the first bolt members 13 respectively used to abut the upper and lower ends of the above-mentioned support suspension 7, and the two ends of the above-mentioned horizontal rod 12 are respectively threadedly connected with the second bolt members 14 used to abut the outer walls of the two sides of the above-mentioned vertical rod 11. That is to say, through the connection and positioning of the vertical rod 11 and the horizontal rod 12, the first boom 2 and the second boom 9 form a whole in the vertical installation groove 10, so that the upper and lower structures are jointly stressed, the rigidity is consistent, and the deformation is coordinated, thereby ensuring balanced force during the casting process.

[0037] In addition, according to Figure 6As shown, the present embodiment also includes an upper box 100 casting formwork structure, and the above-mentioned upper box 100 casting formwork structure includes a U-shaped inner mold 15 and an abutment frame 16, the upper end of the above-mentioned abutment frame 16 is connected to the above-mentioned upper truss 1 and the lower end abuts against the inner wall of the above-mentioned U-shaped inner mold 15, adapted to the upper box 100 The internal section is a U-shaped section, and the abutment member specifically includes a frame body, the upper end of the above-mentioned frame body is detachably connected to the above-mentioned upper truss 1, and the lower end is threadedly provided with a retractable abutment joint for abutting the inner wall of the U-shaped inner mold 15, and the above-mentioned abutment joints are provided in plurality, which can abut the inner wall of the U-shaped inner mold 15 at intervals, thereby ensuring that the abutment effect has a large range and good uniformity; and the abutment joint can adjust the rotation angle and is provided with an elastic abutment layer, which can ensure that it can be completely fitted to the inner wall of the U-shaped inner mold 15 during abutment, thereby ensuring the best abutment effect.

[0038] like Figure 5 As shown, in the embodiment of the present application, it also includes a stress monitoring device for detecting the hanging basket system, which can monitor the deformation of key points, the stress (strain) of key rods, and the deformation of rear anchors to avoid danger and provide accurate deformation values. Specifically, the above-mentioned stress monitoring device includes a plurality of deflection sensors 300 and a plurality of stress sensors 200. The plurality of deflection sensors 300 are respectively arranged on the above-mentioned upper truss 1, the above-mentioned support suspension 7 and the bottom formwork 3, and are respectively used to detect the deflection change value of the upper truss 1 of the upper structure, the deflection change value of the boom, and the deflection change value of the anchor point of the bottom formwork 3; the plurality of stress sensors 200 are respectively arranged on the above-mentioned upper truss 1, the above-mentioned first boom 2, the first support suspension 7 and the bottom formwork 3. The second boom 9, the above-mentioned support frame, the above-mentioned support suspension 7 and the anchoring point of the above-mentioned bottom formwork 3 and the above-mentioned stacked box beam body are respectively used to monitor the stress and strain of the most stressed rod of the upper truss 1, the first boom 2, the second boom 9, and the steel beam of the support suspension 7. The circular mark in the figure represents the stress sensor 200, and the triangular mark represents the deflection sensor 300; wherein the stress sensor 200 and the deflection sensor 300 are both existing sensor devices on the market, and in order to further improve the monitoring effect, the present embodiment also includes an environmental monitoring device for monitoring the external environment, which can monitor the wind force, temperature and humidity changes in the environment, so as to conduct a more accurate analysis by combining the stress monitoring device.

[0039] In summary, the embodiment of the present application proposes a hanging basket system for cantilever symmetrical casting of a variable-section stacked box aqueduct. The hanging basket system can adapt to the cantilever casting method of a variable-section complex stacked box structure, and can effectively complete the casting process from tall stacked boxes to short stacked boxes and then to a single box. The upper and lower structures are fully jointly stressed through through pins, and the deformation is consistent. The through pin shaft facilitates the disassembly and installation of the first boom 2 and the second boom 9. Moreover, the hanging basket's built-in monitoring system can monitor the deformation of key points, the stress (strain) of key rods, and the deformation of the rear anchor to avoid danger and provide accurate deformation values. The above-mentioned support frame can well support the thick middle partition with variable cross-section, so that the upper hanging basket does not need to pass through the middle partition, which is more conducive to preventing the middle partition from cracking; the lower structure and the lower box 400 are fixed by anchors 5 and ceiling supports 6. The fixing points are stable and easy to disassemble and install. There is no need to drill holes or penetrate the concrete structure, especially the middle partition, which is more conducive to avoiding damage to the middle partition. In addition, the casting formwork structure of the upper box 100 is set to ensure that it can be completely fitted to the inner wall of the U-shaped inner mold 15 when abutting, thereby ensuring the best abutment effect and avoiding the phenomenon of the U-shaped inner mold floating.

Claims

1. A hanging basket system for cantilever symmetrical casting of variable-section stacked box aqueduct, characterized in that: It comprises a continuously variable cross-section beam body, wherein an upper truss (1) is arranged on one side of the upper end of the continuously variable cross-section beam body along the casting direction, the upper truss (1) is provided with a first suspension arm (2) extending downward, and a casting hanger assembly is arranged at the lower end of the first suspension arm (2); The continuously variable cross-section beam body comprises a single box beam and a stacked box beam, the stacked box beam comprises an upper box (100) and a lower box (400), the inner cavity cross-sectional area of ​​the lower box (400) gradually decreases from the middle to both sides until the volume is 0 at a preset position, and then transitions to the single box beam, the single box beam comprising an upper box (100); When the stacked box beam is in the casting state, the casting hanger assembly comprises a support frame with adjustable height arranged in the lower box (400), the lower end and the upper end of the support frame respectively abut against the top wall and the bottom wall of the inner cavity of the lower box (400); the support frame is provided with a support hanger (7) on the side facing the casting direction of the stacked box beam body, and the upper end of the support hanger (7) is provided with a bracket (8) flush with the top wall of the inner cavity of the lower box (400), and the bracket (8) is used to support the casting template at the top of the lower box (400). One end of the suspension (7) away from the stacked box beam body is detachably connected to the first suspension arm (2), and the supporting suspension (7) is detachably connected to a second suspension arm (9) extending vertically downward, and a bottom template (3) is detachably provided at the lower end of the second suspension arm (9), and the first suspension arm (2) and the second suspension arm (9) are detachably connected; one end of the bottom template (3) away from the second suspension arm (9) is anchored to the bottom of the lower box (400) body, and the bottom template is used to support the casting template system of the lower box (400); When in a single box beam casting state, the casting hanger assembly comprises a bottom template (3) detachably connected to the lower end of the first hanging arm (2), and one end of the bottom template (3) away from the first hanging arm (2) is anchored to the bottom of the upper box (100) body, and the bottom template is used to support the casting template system of the upper box (100).

2. A hanging basket system for cantilever symmetrical casting of variable cross-section stacked box aqueduct according to claim 1, characterized in that: It also includes an upper box (100) casting template structure, the upper box (100) casting template structure includes a U-shaped inner mold (15) and an abutment frame (16), the upper end of the abutment frame (16) is connected to the upper truss (1) and the lower end abuts against the inner wall of the U-shaped inner mold (15).

3. The hanging basket system for cantilever symmetrical casting of variable cross-section stacked box aqueduct according to claim 1 is characterized in that: When in the stacked box beam casting state, the first boom (2) and the second boom (9) are both arranged in a corresponding manner, and the first booms (2) are evenly arranged at intervals along the upper truss (1) in the transverse direction, and the supporting suspension (7) is detachably connected to the first boom (2) and the second boom (9) at corresponding positions.

4. The hanging basket system for cantilever symmetrical casting of variable cross-section stacked box aqueduct according to claim 1 is characterized in that: The support frame includes a plurality of vertical steel columns (4), and the upper and lower ends of the vertical steel columns (4) are respectively provided with footings (5) and ceiling supports (6), wherein the footings (5) are used to abut against the bottom wall of the inner cavity of the lower box (400), and the ceiling supports (6) are used to abut against the top wall of the inner cavity of the lower box (400).

5. The hanging basket system for cantilever symmetrical casting of variable cross-section stacked box aqueduct according to claim 1 is characterized in that: The bottom template (3) and the bottom of the stacked box beam body are provided with a plurality of anchor points.

6. The hanging basket system for cantilever symmetrical casting of variable cross-section stacked box aqueduct according to claim 1, characterized in that: The supporting suspension (7) is provided with a mounting groove (10), a through-pin structure is passed through the mounting groove (10), and the through-pin structure is used for detachably connecting the first suspension arm (2) and the second suspension arm (9).

7. A hanging basket system for cantilever symmetrical casting of variable cross-section stacked box aqueduct according to claim 6, characterized in that: The mounting groove (10) comprises a vertical mounting groove (10) and a horizontal mounting groove (10); the through-pin structure comprises a vertical rod (11); the upper and lower ends of the vertical rod (11) are respectively connected to the first suspension arm (2) and the second suspension arm (9); the vertical rod (11) penetrates into the vertical mounting groove (10); a horizontal rod (12) is penetrated through the middle of the vertical rod (11); the horizontal rod (12) penetrates into the horizontal mounting groove (10); the vertical rod (11) and the horizontal rod (12) are provided with a first keyway and a second keyway that are interconnected at corresponding positions; the upper and lower ends of the vertical rod (11) are respectively provided with a first bolt member (13) for abutting against the upper and lower ends of the support suspension (7); and the two ends of the horizontal rod (12) are respectively provided with a second bolt member (14) for abutting against the outer walls of both sides of the vertical rod (11).

8. The hanging basket system for cantilever symmetrical casting of variable cross-section stacked box aqueduct according to claim 1 is characterized in that: It also includes a stress monitoring device for detecting the hanging basket system, the stress monitoring device including a plurality of deflection sensors (300) and a plurality of stress sensors (200), the plurality of deflection sensors (300) being respectively arranged on the upper truss (1), the supporting suspension (7) and the bottom formwork (3), and the plurality of stress sensors (200) being respectively arranged on the anchoring locations of the upper truss (1), the boom, the supporting frame, the supporting suspension (7) and the bottom formwork (3) and the stacked box beam body.

9. A hanging basket system for cantilever symmetrical casting of variable cross-section stacked box aqueduct according to claim 8, characterized in that: Also included is an environmental monitoring device for monitoring the external environment.

Images