Construction method of suspended bailey beam aqueduct body formwork

Abstract

The invention discloses a construction method of a suspended bailey beam aqueduct body formwork. The construction method comprises the following steps that firstly, construction preparation is conducted; secondly, a bearing beam is installed; thirdly, a lifting sand box is installed and filled; fourthly, a bailey beam support is erected; fifthly, the bailey beam support is pre-pressed; sixthly, aqueduct formworks are installed; seventhly, concrete is poured in a layered mode; eighthly, the inner formwork is dismantled and maintained; ninthly, the movable groove-crossing reversely-hung working platform is in place; tenthly, the pressure of the lifting sand box on one side of the aqueduct is relieved, the outer formwork is removed, and the bailey beam support is removed; eleventhly, the lifting sand box on the other side of the aqueduct is subjected to pressure relief, an outer formwork is removed, and a bailey beam support is removed; 12, the bottom formwork and the bailey beam support at the bottom are reserved and maintained; and 13, pressure relief of the lifting sand box at the bottom of the aqueduct, dismantling of the bottom formwork and dismantling of the bailey beam support are conducted, the foundation reinforcement problem can be avoided, efficiency can be improved, cost can be reduced, and the construction period can be shortened.

Description

Technical Field

[0001] This invention relates to the field of aqueduct engineering technology, and in particular to a construction method for a suspended Bailey bridge aqueduct body formwork. Background Technology

[0002] Aqueducts, as important hydraulic structures, are widely used in the water conservancy industry and bridge engineering, such as inter-basin water transfer, irrigation canal system intersections, and water conservancy hubs, playing a crucial role in water conveyance and overcoming obstacles. During the construction of high-bay aqueduct projects, the dual constraints of terrain conditions and structural height are often encountered. For example, the construction area may span complex terrains such as paddy fields, hills, mountains, and river channels, with pier heights exceeding 20 meters and single spans exceeding 5 meters. Traditional full-span scaffolding methods have revealed significant shortcomings in terms of terrain adaptability, economic efficiency, and construction schedule assurance. Summary of the Invention

[0003] One of the objectives of this invention is, at least, to provide a construction method for a suspended Bailey bridge aqueduct body formwork to overcome the problems existing in the prior art. This method can not only avoid the difficulties of foundation reinforcement under complex geological conditions, but also improve construction efficiency, reduce construction costs, and shorten the construction period. It demonstrates significant technical, economic, and engineering applicability in aqueduct construction scenarios with complex terrain and high piers.

[0004] To achieve the above objectives, the technical solution adopted by the present invention includes the following aspects.

[0005] A construction method for a suspended Bailey bridge aqueduct body formwork includes the following steps: Step 1, Construction Preparation: Complete the processing and assembly of the lifting sand box; Step 2, Install pad beams: On the top of the cap beam located on the two piers, install two pad beams side by side along the width of the cap beam, and limit their position with precision rolled threaded steel bars; Step 3, Install and fill the lifting sand boxes: Install multiple lifting sand boxes side by side along the length of the pad beam, and fix each lifting sand box to the pad beam by a limiting device; Step 4, Erect Bailey Beam Supports: On each pair of corresponding lifting sand boxes on adjacent cap beams, a Bailey beam support is erected through the suspension end. Steel formwork is laid on the top of the Bailey beam support, and the steel formwork on the Bailey beam support in the middle serves as the bottom formwork of the aqueduct. Step 5: Preload the Bailey beam support; Step 6: Install the outer and inner formwork of the aqueduct; Step 7: Pour concrete in layers; Step 8, Remove the inner formwork and cure: After the concrete strength reaches 70%-80%, remove the inner formwork and cure the concrete. Step nine: The mobile cross-ditch reverse hoisting work platform is in place; Step 10: Depressurize the lifting sand box on one side of the aqueduct, remove the outer formwork, and dismantle the Bailey beam support. Step eleven involves successively depressurizing the lifting sand box on the other side of the aqueduct, removing the outer formwork, and dismantling the Bailey beam support. Step 12: Preserve the bottom formwork and Bailey beam support at the bottom of the aqueduct and carry out maintenance on the aqueduct. Step thirteen: After the concrete strength reaches 100%, the pressure relief of the lifting sand box at the bottom of the aqueduct, the removal of the bottom formwork, and the dismantling of the Bailey beam support are completed in sequence.

[0006] Preferably, in step two, the two pad beams are used for support during the construction of adjacent spans of the aqueduct. The two pad beams are arranged on both sides close to the cap beam, and the length of the pad beams is adapted to the length of the cap beam.

[0007] Preferably, in step three, lifting sand boxes are installed on two pad beams that are close to each other on adjacent cap beams. Three sets of lifting sand box groups are installed side by side along the length of each pad beam, including a central sand box group and side sand box groups located on both sides of the central sand box group. After the installation of the lifting sand boxes is completed, the interior of the lifting sand boxes is filled with filling material. The filling material is dry and clean medium-coarse sand with a fineness modulus of 2.3-3.7 and a moisture content of no more than 5%. The amount of sand in the lifting sand boxes is obtained through compaction tests and calculations to ensure that the bottom surface of the Bailey beam support is on the same horizontal plane after load-bearing.

[0008] Preferably, in step four, three sets of Bailey beam support groups are erected, including a central Bailey beam support group and side Bailey beam support groups located on both sides of the central Bailey beam support group. The central Bailey beam support group is located on the central sand box group, and the two sets of side Bailey beam support groups are located on the two sets of side sand box groups respectively. The Bailey beam support adopts a double-strength upper chord. The two suspension ends are respectively fixedly installed on the two corresponding lifting sand boxes on the adjacent cap beam and located at both ends of the Bailey beam support. The bottom template spans across the top of the central Bailey beam support group.

[0009] Preferably, in step four, before laying the steel formwork on top of the Bailey beam support, steel shims for adjusting the formwork elevation are installed on top of the Bailey beam support.

[0010] Preferably, in step five, the total preloading load is 1.1 times the design load, the sum of the weight of the formwork support system and the variable load, and the preloading is applied in no less than three levels. The first three levels are 60%, 80%, and 100% of the preloading load value within the unit, respectively. The preloading time is 72 hours for the first span and 24 hours for the subsequent spans. The elastic deformation value is recorded.

[0011] Preferably, in step six, the outer formwork and inner formwork of the aqueduct are installed sequentially, and the internal reinforcing bars of the aqueduct are installed after the outer formwork is installed and before the inner formwork is installed. After the inner formwork is installed, the aqueduct formwork is reinforced.

[0012] Preferably, in step ten, the pressure of a group of side sand box groups is depressurized, the outer template of the aqueduct body on the same side as the side sand box group is removed, and the side Bailey beam support group on the group of side sand box groups is removed.

[0013] Preferably, in step eleven, the pressure of another set of side sand box groups is depressurized, the outer template of the aqueduct body on the same side as the side sand box group is removed, and the side Bailey beam support group on the side sand box group is removed.

[0014] Preferably, in step thirteen, the pressure of the central sand box group is depressurized, the bottom template at the bottom of the aqueduct is removed, and the central Bailey beam support group on the central sand box group is removed.

[0015] In summary, by adopting the above technical solution, the present invention has at least the following beneficial effects: The use of suspended Bailey bridge aqueduct formwork effectively mitigates the dual constraints imposed by terrain conditions and structural height. The absence of foundation treatment avoids the challenges of foundation reinforcement under complex geological conditions. Modular rapid assembly technology significantly improves construction efficiency. High load-bearing capacity is achieved through optimized structural mechanics models. This construction method systematically overcomes the technical bottlenecks of traditional processes, such as poor foundation stability, high construction costs, and difficulty in controlling the construction period. It demonstrates significant technical and economic advantages and engineering applicability in complex terrain and high-pier construction scenarios, providing a novel solution for hydraulic aqueduct engineering construction.

[0016] 2. The Bailey beam support is directly suspended from the top of the cap beam to form an "aerial support platform". The bearing capacity of the pier column itself is used to replace the traditional ground support, avoiding dependence on the foundation. Standardized Bailey beams are combined with non-standard customized suspension ends. The factory is prefabricated and the site is quickly hoisted to improve construction efficiency. By forming a closed stress chain through the load transfer path of structural load → formwork → Bailey beam support → suspended end → lifting sand box → pad beam → cap beam → pier column, stress is evenly distributed. By combining double-strength upper chord with lifting sand box and lifting sand box with pad beam, the contact surface is expanded to disperse stress and avoid local damage to the pier column concrete.

[0017] Before construction, at least three levels of preloading (precast concrete blocks) are carried out, and the measured deflection is compared with the theoretical value to eliminate inelastic deformation; the Bailey beam elevation is adjusted by adding steel shims to control the pre-camber and deflection. Attached Figure Description

[0018] Figure 1 A construction flowchart of the suspended Bailey bridge aqueduct body formwork, which is an exemplary embodiment of the present invention.

[0019] Figure 2 This is a schematic elevation view of the formwork frame for a suspended Bailey bridge aqueduct.

[0020] Figure 3 This is a schematic diagram of the longitudinal section of the formwork frame for a suspended Bailey bridge aqueduct.

[0021] Figure 4 This is a schematic diagram of the longitudinal section after the inner formwork has been removed.

[0022] Figure 5 This is a schematic diagram of the longitudinal section after the removal of the outer formwork on the left and the supports for the three Bailey beams on the left.

[0023] Figure 6 This is a schematic diagram of the longitudinal section after the removal of the outer formwork on the right side and the supports for the three Bailey beams on the right side.

[0024] Figure 7 This is a schematic diagram of the longitudinal section after the removal of the bottom formwork and the supports for the two middle Bailey beams.

[0025] The markings in the diagram are: 1-base beam, 2-pier column, 3-cap beam, 4-lifting sand box, 5-Bailey beam support, 6-suspended end, 7-outer formwork, 8-inner formwork, 9-concrete, 10-movable cross-slot inverted lifting work platform, 11-bottom formwork. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so that the objectives, technical solutions, and advantages of the present invention will be clearer. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0027] In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. Example

[0028] This embodiment illustrates the construction method of the suspended Bailey bridge aqueduct body formwork. Figure 1 The construction flowchart is provided below. This embodiment takes the construction of one span (15m) of a U-shaped aqueduct with a channel depth of 3m as an example. Figures 2-7The construction of the formwork for the suspended Bailey bridge aqueduct includes the following steps: Step 1, Construction Preparation: Complete the processing and assembly of the lifting sand box 4; Step 2, Install pad beam 1: On the top of the cap beam 3 located on the two piers 2, install two pad beams 1 side by side along the width direction of the cap beam 3, and limit their position with precision rolled threaded steel bars; the two pad beams 1 are used for the support of the construction of adjacent spans of the aqueduct, and the two pad beams 1 are arranged close to the two sides of the cap beam 3. The length of the pad beam 1 is adapted to the length of the cap beam 3. In this embodiment, the height of the pad beam 1 is 14cm. Step 3, Install and fill the lifting sand boxes 4: Install multiple lifting sand boxes 4 side by side along the length of the pad beam 1. Each lifting sand box 4 is fixed to the pad beam 1 by a limiting device. In this embodiment, when constructing a certain span of the aqueduct, lifting sand boxes 4 are installed on two pad beams 1 that are close to each other on adjacent cap beams 3. Three sets of lifting sand box groups are installed side by side along the length of each pad beam 1, including a central sand box group and side sand box groups located on both sides of the central sand box group. This embodiment takes the installation of eight lifting sand boxes 4 side by side along the length of each pad beam 1 as an example (the height of each lifting sand box 4 is, for example, 10cm, and the specific number and lifting height of the lifting sand boxes 4 are not specified). The height of the sand-lifting box 4 can be selectively designed according to construction needs. The middle sand box group consists of two of the aforementioned sand-lifting boxes 4, and each side sand box group consists of three of the aforementioned sand-lifting boxes 4. During use, a limiting device is used to prevent the sand-lifting boxes 4 from shifting and falling. After the installation of the sand-lifting boxes 4 is completed, the interior of each sand-lifting box 4 is filled with filling material. The filling material is dry and clean medium-coarse sand (fineness modulus of 2.3-3.7, moisture content not exceeding 5%). The size of each sand-lifting box 4 is the same, and the amount of sand filled in the sand-lifting box 4 is obtained through compaction tests and calculations to ensure that the bottom surface of the Bailey beam support 5 after load-bearing is on the same horizontal plane. Step 4, Erecting Bailey Beam Supports 5: One Bailey beam support 5 is erected on each pair of corresponding lifting sand boxes 4 on adjacent cap beams 3 via the suspension end 6. Steel formwork is laid on top of the Bailey beam support 5. The steel formwork on the middle Bailey beam support 5 serves as the bottom formwork 11 of the aqueduct. Three sets of Bailey beam support groups are erected, including a central Bailey beam support group and side Bailey beam support groups located on either side of the central Bailey beam support group. The central Bailey beam support group is located on the central sand box group, and the two side Bailey beam support groups are located on the two side sand box groups respectively. In this embodiment, a total of eight Bailey beam support groups 5 are erected (using a 321 type Bailey beam support 5 structure, each support...). The lateral spacing of the Bailey beam support 5 is 450mm. The Bailey beam support 5 is a standard precast component, while the suspension end 6 is a non-standard precast component. The Bailey beam support 5 and the suspension end 6 are precast in the factory and quickly hoisted on site to improve construction efficiency. The two suspension ends 6 are respectively fixedly installed on the two corresponding lifting sand boxes 4 on the adjacent cap beam 3 and located at both ends of the Bailey beam support 5. The bottom formwork 11 spans the top of the middle Bailey beam support group (in this embodiment, the bottom formwork 11 spans the top of the two middle Bailey beam supports 5). The steel formwork located at the top of the side Bailey beam support group is used for the installation of the formwork support system of the aqueduct. The main beam of the Bailey beam support 5 adopts a reinforced chord Bailey beam (a reinforced chord is added to the standard Bailey beam to improve the load-bearing capacity). The Bailey beams in the middle and the irregular Bailey beams at the ends of the Bailey beam support 5 are reinforced with double chords (an additional layer of reinforced chords is added to the upper and lower chords of the standard Bailey beam to improve the load-bearing capacity). The irregular Bailey beams at the ends are cut and adjusted according to the shape of the template to match the shape of the template. For example, the end chords or web members are cut to adapt to the irregular contours of the bridge ends. The Bailey beams in the Bailey beam support 5 are made of 16Mn steel. All other components in the Bailey beam support 5 except for the Bailey beams are made of Q235B steel. 45-type and 90-type standard support frames are used to connect adjacent Bailey beams. The 45-type support frame is used for transverse connection, and the 90-type support frame is used for longitudinal connection. Before each Bailey bridge support frame is erected, the assembly of each Bailey bridge group is completed on the ground. Lubricant is applied when connecting the pins, and the bolt torque value reaches 300 N·m. The hoisting position of each Bailey bridge group is accurately marked before hoisting. After all the Bailey bridges in a span are accurately in place, the bottom horizontal bracing is installed to ensure the stability of the structure. After the bottom horizontal bracing is installed, the transverse distribution beams are hoisted. When the pier height is <25m, two 25t truck cranes are used for lifting. When the pier height is ≥25m, a single 60t crane is used for hoisting. The distance between lifting points is ≤6m, and the wind speed during hoisting operation is ≤6 (13.8m / s). In practical application, before laying the steel formwork on top of the Bailey beam support 5, steel shims can also be installed on top of the Bailey beam support 5. The steel shims are used to adjust the elevation of the formwork. Step 5: Preload the Bailey beam support 5: The total preload is 1.1 times the design load (the design load is the structural self-weight of the aqueduct), the weight of the formwork support system, and the sum of the variable load. The preload is applied in no less than three levels, with the first three levels being 60%, 80%, and 100% of the preload value within the unit, respectively. The preload time is 72 hours for the first span and 24 hours for subsequent spans. Record the elastic deformation value. Step 6, Install the outer formwork 7 and inner formwork 8 of the aqueduct: Complete the installation of the outer formwork 7 and inner formwork 8 of the aqueduct in sequence. After the outer formwork 7 is installed and before the inner formwork 8 is installed, complete the installation of the internal steel reinforcement of the aqueduct. After the inner formwork 8 is installed, reinforce the aqueduct formwork. Step 7, Layered pouring of concrete 9: The concrete 9 of the aqueduct body is divided into three layers: bottom slab, web slab and top slab. The thickness of each layer is ≤1m, the interval is ≤2 hours, the pouring rate is controlled to be ≤1.5m³ / min, the temperature of concrete 9 when it is poured into the formwork is ≤30℃ during summer construction, and steam curing is used in winter to maintain the ambient temperature ≥5℃. Step 8, Remove inner formwork 8 and cure: After the concrete 9 reaches 70%-80% strength, remove inner formwork 8 and cure the concrete 9. Step 9: The movable cross-slot reverse hoisting work platform 10 is in place; the movable cross-slot reverse hoisting work platform 10 is used as a work platform for depressurizing the lifting sand box 4, removing the formwork, and dismantling the Bailey beam support 5. Step 10: Depressurize the lifting sand box 4 on one side of the aqueduct, remove the outer template 7, and remove the Bailey beam support 5 in sequence: Depressurize a group of the side sand box groups, remove the outer template 7 of the aqueduct body on the same side as the side sand box group, and remove the side Bailey beam support group on the group of side sand box groups. In this embodiment, depressurize the lifting sand box 4 under the three Bailey beam supports 5 on the left side, remove the outer template 7 on the left side of the aqueduct body, and remove the three Bailey beam supports 5 on the left side. Step 11: Depressurize the lifting sand box 4 on the other side of the aqueduct, remove the outer template 7, and remove the Bailey beam support 5 in sequence: Depressurize the other set of side sand box groups, remove the outer template 7 of the aqueduct body on the same side as the side sand box group, and remove the side Bailey beam support group on the side sand box group. In this embodiment, depressurize the lifting sand box 4 under the three Bailey beam supports 5 on the right side, remove the outer template 7 on the right side of the aqueduct body, and remove the three Bailey beam supports 5 on the right side. Step 12: Retain the bottom formwork 11 and Bailey beam support 5 at the bottom of the aqueduct and carry out maintenance on the aqueduct. Step 13: After the concrete 9 reaches 100% strength, the pressure relief of the lifting sand box 4 at the bottom of the aqueduct, the removal of the bottom formwork 11, and the removal of the Bailey beam support 5 are completed in sequence: the pressure relief of the middle sand box group is carried out, the bottom formwork 11 at the bottom of the aqueduct is removed, and the middle Bailey beam support group on the middle sand box group is removed. In this embodiment, the pressure relief of the lifting sand box 4 under the middle two Bailey beam supports 5 is carried out, the bottom formwork 11 at the bottom of the aqueduct is removed, and the middle two Bailey beam supports 5 are removed.

[0029] The above description is merely a detailed illustration of specific embodiments of the present invention and is not intended to limit the invention. Various substitutions, modifications, and improvements made by those skilled in the art without departing from the principles and scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A construction method for a suspended Bailey bridge aqueduct body formwork, characterized in that, Includes the following steps: Step 1, Construction Preparation: Complete the processing and assembly of the lifting sand box (4); Step 2, install pad beams (1): On the top of the cap beam (3) located on the two piers (2), install two pad beams (1) side by side along the width direction of the cap beam (3), and limit them with fine rolled threaded steel bars; Step 3, install and fill the lifting sand box (4): install multiple lifting sand boxes (4) side by side along the length of the pad beam (1), and each lifting sand box (4) is fixed to the pad beam (1) by a limiting device; Step 4, erect Bailey beam support (5): erect a Bailey beam support (5) on each pair of lifting sand boxes (4) on the adjacent cap beam (3) through the suspension end (6), lay steel formwork on the top of Bailey beam support (5), and the steel formwork on the Bailey beam support (5) in the middle is used as the bottom formwork (11) of the aqueduct. Step 5: Preload the Bailey beam support (5); Step 6: Install the outer template (7) and inner template (8) of the aqueduct; Step 7, pour concrete in layers (9); Step 8, Remove the inner formwork (8) and cure: After the concrete (9) reaches 70%-80% strength, remove the inner formwork (8) and cure the concrete (9); Step 9: The mobile cross-slot reverse hoisting work platform (10) is in place; Step 10: Depressurize the lifting sand box (4) on one side of the aqueduct, remove the outer formwork (7), and remove the Bailey beam support (5) in sequence. Step 11: Depressurize the lifting sand box (4) on the other side of the aqueduct, remove the outer formwork (7) and the Bailey beam support (5) in sequence; Step 12: Retain the bottom formwork (11) and Bailey beam support (5) at the bottom of the aqueduct and carry out maintenance on the aqueduct; Step 13: After the concrete (9) reaches 100% strength, the pressure of the lifting sand box (4) at the bottom of the aqueduct, the removal of the bottom formwork (11), and the removal of the Bailey beam support (5) are completed in sequence.

2. The construction method of the suspended Bailey bridge aqueduct body formwork according to claim 1, characterized in that, In step two, the two pad beams (1) are used for the support of the construction of adjacent spans of the aqueduct. The two pad beams (1) are arranged on both sides close to the cap beam (3), and the length of the pad beams (1) is adapted to the length of the cap beam (3).

3. The construction method of the suspended Bailey bridge aqueduct body formwork according to claim 2, characterized in that, In step three, lifting sand boxes (4) are installed on two pad beams (1) that are close to each other on adjacent cap beams (3). Three sets of lifting sand box groups are installed side by side along the length of each pad beam (1), including a central sand box group and side sand box groups located on both sides of the central sand box group. After the installation of the lifting sand box (4) is completed, the interior of the lifting sand box (4) is filled with filling material. The filling material is dry and clean medium-coarse sand with a fineness modulus of 2.3-3.7 and a moisture content of no more than 5%. The amount of sand in the lifting sand box (4) is obtained through compaction test and calculation so that the bottom surface of the Bailey beam support (5) after load-bearing is on the same horizontal plane.

4. The construction method of the suspended Bailey bridge aqueduct body formwork according to claim 3, characterized in that, In step four, three sets of Bailey beam support groups are erected, including a central Bailey beam support group and side Bailey beam support groups located on both sides of the central Bailey beam support group. The central Bailey beam support group is located on the central sand box group, and the two sets of side Bailey beam support groups are located on the two sets of side sand box groups respectively. The Bailey beam support (5) adopts a double-strength upper chord. The two suspension ends (6) are respectively fixedly installed on the two corresponding lifting sand boxes (4) on the adjacent cap beam (3) and located at both ends of the Bailey beam support (5). The bottom template (11) spans across the top of the central Bailey beam support group.

5. The construction method of the suspended Bailey bridge aqueduct body formwork according to claim 4, characterized in that, In step four, before laying the steel formwork on top of the Bailey beam support (5), steel shims for adjusting the formwork elevation are installed on top of the Bailey beam support (5).

6. The construction method of the suspended Bailey bridge aqueduct body formwork according to claim 1, characterized in that, In step five, the total preloading load is 1.1 times the design load, the sum of the weight of the formwork support system and the variable load. The preloading is applied in no less than three levels, with the first three levels being 60%, 80%, and 100% of the preloading load value within the unit, respectively. The preloading time is 72 hours for the first span and 24 hours for subsequent spans. The elastic deformation value is recorded.

7. The construction method of the suspended Bailey bridge aqueduct body formwork according to claim 1, characterized in that, In step six, the installation of the outer formwork (7) and inner formwork (8) of the aqueduct is completed in sequence. After the outer formwork (7) is installed and before the inner formwork (8) is installed, the inner steel reinforcement of the aqueduct is installed. After the inner formwork (8) is installed, the aqueduct formwork is reinforced.

8. The construction method of the suspended Bailey bridge aqueduct body formwork according to claim 5, characterized in that, In step ten, the pressure of a group of side sand box groups is depressurized, the outer template of the aqueduct body on the same side as the side sand box group is removed, and the side Bailey beam support group on the group of side sand box groups is removed.

9. The construction method of the suspended Bailey bridge aqueduct body formwork according to claim 8, characterized in that, In step eleven, the pressure of another set of side sand box groups is released, the outer template of the aqueduct body on the same side as the side sand box group is removed, and the side Bailey beam support group on the side sand box group is removed.

10. The construction method of the suspended Bailey bridge aqueduct body formwork according to claim 9, characterized in that, In step thirteen, the pressure of the central sand box group is released, the bottom template at the bottom of the aqueduct is removed, and the central Bailey beam support group on the central sand box group is removed.

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