Prefabricated bridge deck in harsh areas, structure for reducing cracks, and construction method thereof

Abstract

The present invention discloses a structure for prefabricating a bridge deck in harsh areas and reducing cracks, as well as a construction method thereof. The structure for prefabricating a bridge deck in harsh areas and reducing cracks is composed of a modular splicing prefabrication base and a splicing mobile curing shed. The modular splicing prefabrication base is formed by docking several module bases through adjacent sides to form an integral structure for providing a prefabrication base for prefabricated components. The splicing mobile curing shed is inserted at the upper end of the modular splicing prefabrication base to effectively improve the curing conditions of concrete components. The present invention has high safety performance, fast modular installation speed, convenient use, easy turnover, and reduces cracks. It is applicable to the prefabrication of various components, is not limited by the size of the components, and is not limited by the scale of the site. It solves the problems of site space, environmental impact, and crack reduction, avoids material waste and damage to the structure caused by cracks, enhances the construction quality of prefabricated components, and improves the durability of the structure.

Description

Technical Field

[0001] The present invention relates to a structure for prefabricating a bridge deck in a harsh area and reducing cracks and a construction method thereof. Background Art

[0002] Harsh areas include terrain-harsh areas such as mountain slopes and steep terrains, and climate-harsh areas with large day-night temperature differences, strong winds, dry high temperatures, and low air humidity. When constructing roads in harsh areas, pier columns are mostly used as the supporting structure between the road and the ground, and composite beams and reinforced concrete bridge decks are used as the road surface. The composite beams, reinforced concrete bridge decks, etc. are all prefabricated components. Usually, each reinforced concrete bridge deck is transported to the construction site one by one by a large beam and slab transport vehicle after being built in the prefabricated component factory, and then hoisted by a crane to the upper part between two adjacent high capping beams in the longitudinal bridge direction. Due to the large volume and heavy weight of the composite beams and reinforced concrete bridge decks, it is difficult to transport them in mountain slopes and steep terrains. For example, in the bridge at K32 + 150 of the Tongding Expressway in Gansu Province, it is a side-by-side separated two-lane, that is, a design with side-by-side double pier columns and double high capping beams. The center pile number is K32 + 150, and the span combination is 20 + 20 + 20m. The lower part of the bridge uses column-type pier columns with a diameter of 1.3m and bored cast-in-place pile foundations with a diameter of 1.5m. The whole bridge is located in a mountain slope area with a steep terrain, which is not convenient for the passage of large beam and slab transport vehicles. If the traditional prefabrication, transportation and installation construction in a prefabricated component factory are adopted, a long-distance and high-standard construction beam transport channel needs to be built, and the construction cost is relatively large. Moreover, there are extremely high safety risks in mountain transportation, which is not conducive to safety. If prefabricated on-site, it is difficult to achieve the condition of a flat and hard bottom surface for the prefabricated components in the harsh terrain. At the same time, this area belongs to a climate-harsh area with strong winds, large temperature differences, and low air humidity. If the beams and slabs are prefabricated on-site, due to the variety of prefabricated components, thin plate thickness, long storage and maintenance periods, and limited prefabrication sites, most prefabricated components are placed outdoors or cured by simply wrapping them with geotextiles and sprinkling water. The curing effect is poor. Especially in areas with strong winds, large temperature differences, and low air humidity, cracks are extremely likely to occur. If the curing is not timely and in place, the internal and external temperature differences of the prefabricated components and the influence of concrete shrinkage will cause cracks, resulting in the construction effect not meeting the design and specification requirements and the quality being difficult to guarantee. There are no topographic and climatic conditions for on-site prefabrication of beams and slabs in the above-mentioned areas. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a structure for prefabricating a bridge deck in a harsh area and reducing cracks and a construction method thereof, which can quickly form good prefabrication conditions for prefabricated components and ensure the quality of prefabricated components in a harsh area.

[0004] To solve the above technical problems, the present invention provides the following technical solutions: A precast bridge deck structure for harsh areas and reducing cracks, including a left-end module base. The precast bridge deck structure for harsh areas and reducing cracks is composed of a modular splicing precast base and a spliced mobile curing shed. The modular splicing precast base is formed by docking several module bases through adjacent sides to provide a precast base for precast components. The spliced mobile curing shed is inserted at the upper end of the modular splicing precast base to effectively improve the curing conditions of concrete components.

[0005] As a preferred technical solution of the present invention, the peripheries of the upper end surfaces of the several module bases are rectangular. Each module base adopts a modular design, and the shape of the upper end surface of each module base is reversely corresponding and the same as the shape of the corresponding bottom surface of the precast bridge deck.

[0006] As a preferred technical solution of the present invention, the modular splicing precast base is composed of a left-end module base, a right-end module base, several special-shaped module bases and several splicing module bases. The left and right end module bases are respectively located at the left and right ends of the modular splicing precast base. The shapes of the upper end surfaces of the left and right end module bases are reversely corresponding and the same as the shapes of the lower end surfaces of the left and right ends of the precast bridge deck respectively. The special-shaped module bases are located between the corresponding side surfaces of the left and right end module bases. The shapes of the upper end surfaces of the special-shaped module bases are reversely corresponding and the same as the corresponding shapes of the special-shaped parts of the lower end surface of the precast bridge deck. Each splicing module base is spliced in the space between the left and right end module bases and the side surfaces of the special-shaped module bases. The shapes of the upper end surfaces of the splicing module bases are reversely corresponding and the same as the shapes of the corresponding parts of the lower end surface of the precast bridge deck. Skirt plates are provided downward on the four sides of each module base. The skirt plates of each module base are respectively in the shape of a rectangular frame. The upper end surfaces of the skirt plates are abutted and fixedly connected with the corresponding lower edges of the module base to form an integral structure. The lower end surfaces of the skirt plates are on the same plane. A number of fastening bolt holes are provided at intervals on the adjacent skirt plates of the docked module bases. The fastening bolts pass through the corresponding fastening bolt holes on the adjacent skirt plates of each module base and are fastened with the fastening nuts through gaskets to dock each module base into an integral body to form a modular splicing precast base. A number of plugging fixed cylinders for inserting and fixing the lower ends of the corresponding support rods of the splicing mobile curing shed are provided on the skirt plates located outside the modular splicing precast base. A reinforcing support plate is provided in the middle of the bottom surface of each module base.

[0007] As a preferred technical solution of the present invention, a lengthening support column is respectively provided at each of the four corners of the bottom surface of each module base for lengthening and flatly supporting each module base. The lengthening support column is made of an I-beam. The upper end surface of the lengthening support column is fixed integrally with the inner side surface of the upper end of each module base through a fixing plate. A support flange is provided at the lower end surface of the lengthening support column. A plurality of docking screw holes are provided at intervals around the support flange. The lower end surface of the support flange is on the same plane as the lower end surface of the skirt board of each module base.

[0008] As a preferred technical solution of the present invention, the module base is made of a steel plate with a thickness of 1 to 1.5 cm; or made of reinforced concrete. A steel bar grid is provided inside each module base made of reinforced concrete. Angle steel for corner wrapping is provided at the outer end corners of each module base. The inner end of the angle steel for corner wrapping is fixed integrally with the corresponding part of the steel bar grid. The upper end surface of the angle steel for corner wrapping located on the upper end surface of each module base is 2 to 3 mm higher than the upper end surface of the module base. The corresponding fastening bolt holes on the adjacent skirt boards of each module base are bolt hole embedded parts fixed to the corresponding part of the steel bar grid in the concrete. The plug-in fixing cylinder on the outer skirt board of the modular splicing precast base is a plug-in fixing cylinder embedded part fixed to the corresponding part of the steel bar grid in the concrete.

[0009] As a preferred technical solution of the present invention, the splicing and mobile curing shed is composed of support columns, cross beams, roof beams, edge longitudinal bars, ridge longitudinal bars, vertical support bars and wall bars. A docking flange is provided upward at the upper end of the support column. The upper part of the support column is fixed to one end of a vertical short bar inward. A docking flange is provided at the other end of the short bar. The middle part of the support column is fixed to one end of a short bar vertically arranged longitudinally. A docking flange is provided at the other end of the short bar. A limit disk is provided at the lower part of the support column. The support column at the lower end of the limit disk is a plug-in part inserted into the plug-in fixing cylinder. Docking flanges are respectively provided at both ends of the cross beam, roof beam, edge longitudinal bar, ridge longitudinal bar, vertical support bar and wall bar. The roof beam is arc-shaped. The middle part of the roof beam extends downward, the lower part extends longitudinally to both sides, and the middle part of the cross beam extends upward and is respectively fixed to one end of each vertical short bar. Docking flanges are respectively provided at the other ends of each short bar. Both ends of the roof beam are respectively connected to the docking flanges at the upper ends of two vertically arranged support columns through docking flanges, connecting bolts and nuts to form a portal frame. Both ends of the cross beam are respectively connected to the corresponding docking flanges on the upper parts of the two support columns through docking flanges, connecting bolts and nuts to form an integral body. Both ends of the vertical support bar are respectively connected to the corresponding docking flanges in the middle of the roof beam and the cross beam through docking flanges, connecting bolts and nuts to form an integral body. An integrated roof beam, cross beam, vertical support bar and two support columns form a portal support frame.

[0010] A number of portal supports are arranged longitudinally side by side at intervals, and adjacent portal supports are interconnected by butt flange plates, connecting bolts and nuts on both ends of the roof beam rods, edge longitudinal rods, ridge longitudinal rods and wall rods to form a spliced and mobile curing shed frame.

[0011] A windproof plastic cloth or a waterproof and windproof cloth is provided on the outer side of the spliced and mobile curing shed frame.

[0012] One end of a reinforcing cable is fixed to each of the four sides at the upper end of the spliced and mobile curing shed frame, and the other end of the reinforcing cable is obliquely outwardly connected to the upper end of a steel rod fixed to the ground.

[0013] As a preferred technical solution of the present invention, the length of the insertion part of the column rod at the lower end of the limit disc is the same as the length of the insertion fixing cylinder, and the outer diameter of the insertion part corresponds to the inner diameter of the insertion fixing cylinder.

[0014] As a preferred technical solution of the present invention, the column rod, cross beam rod, roof beam rod, edge longitudinal rod, ridge longitudinal rod, vertical support rod, short rod and wall rod are steel rods, and the butt flange plates are steel butt flange plates with the same structure and shape.

[0015] A construction method using a structure for prefabricating a bridge deck in a harsh area and reducing cracks includes the following steps:

[0016] (1) Design of each module base: According to the lengths and bottom shapes of the precast bridge decks designed, they are divided into several standard section areas and non-standard section areas. The non-standard section areas include the beam ends at the bottom of the bridge deck and the special-shaped areas corresponding to the convex or concave parts at the bottom of the bridge deck. The standard section areas include the areas common to the two ends at the bottom of the corresponding bridge deck and the precast bridge decks outside the non-standard section areas. First, determine the lengths and upper end surface shapes of the special-shaped module bases according to the non-standard section areas divided by the design, and then determine the lengths and upper end surface shapes of the left-end module base, right-end module base and several spliced module bases according to the standard section areas divided by the design. The upper end area of the modular spliced precast base is larger than the bottom area of the precast bridge deck, and the larger areas located at the peripheries form a working interval with a width of 1-2 m.

[0017] (2) Preparation of each module base: The upper end surfaces of each module base are made of steel plates with a thickness of 1-1.5 cm according to the design. Skirt plates are welded to the lower edges of the rectangular upper end surfaces of each module base. A number of fastening bolt holes are drilled at the same height on the same corresponding positions in the middle of each skirt plate at intervals. A reinforcing support plate is provided in the middle of the bottom surface of each module base. A lengthening support column is provided at each of the four corners of the bottom surface of each module base. The lower end surface of the lengthening support column is on the same plane as the lower end surfaces of the skirt plates and the reinforcing support plate of each module base to form each steel module base.

[0018] Preparation of each reinforced concrete module base: The steel bar grid within each module base is fabricated by knitting and welding the steel bars according to the design. Angle steel for corner wrapping is provided at the outer end corners of each module base. The inner end of the angle steel for corner wrapping is fixed integrally with the steel bar grid at the corresponding part. The upper end surface of the angle steel for corner wrapping located on the upper end surface of each module base is 2 - 3 mm higher than the upper end surface of the module base. The corresponding fastening bolt holes on the adjacent skirt boards of each module base are bolt hole embedded parts fixed to the steel bar grid at the corresponding part within the concrete. The plug-in fixing cylinders located on the outer skirt boards of the modular splicing precast base are plug-in fixing cylinder embedded parts fixed to the steel bar grid at the corresponding part within the concrete. One extension support column embedded part is fixed at each of the four corners of the bottom surface of the steel bar grid of each module base. A layer of concrete mortar with a thickness of 5 - 8 cm is poured outside the steel bar grid of each module base to form each module base made of reinforced concrete.

[0019] The shape of the upper end surface of each special-shaped module base is reversely corresponding and identical to the shape of the non-standard section area of the bottom surface of each precast bridge deck designed. The shape of the upper end surface of the left-end module base, the right-end module base, and several splicing module bases is reversely corresponding and identical to the shape of the standard section area of the bottom surface of each precast bridge deck designed.

[0020] (3) Prepare the strut rods, cross beams, roof beams, edge longitudinal rods, ridge longitudinal rods, vertical support rods, and wall rods of the mobile curing shed, and the butt flange plates provided at their upper ends, windproof plastic sheets or waterproof and windproof cloths. Prepare all the fastening bolts, washers, fixing nuts, connecting bolts, and nuts, and struts with flange plates at the upper ends.

[0021] (4) Erection of modular spliced precast base: Transport each module base and accessories to the construction site. According to the shape and length of the lower end face of the precast bridge deck to be fabricated, splice the left-end module base, right-end module base, several special-shaped module bases and several splicing module bases. It should be ensured that the upper end faces of each module base are horizontally arranged. For this purpose, the lower ends of each module base can be butt-connected to the columns with flanges at the upper end, or cushion stones, or skirt plates and strengthening support plates through extended support columns to ensure that the lower ends of each abutment directly abut on the solid ground. Pass fastening bolts through the corresponding fastening bolt holes on the adjacent skirt plates of each module base and fasten them with washers and fastening nuts to connect each module base into an integrated modular spliced precast base. The left-end and right-end module bases are respectively located at the left and right ends of the modular spliced precast base. The shapes of the upper end faces of the left-end and right-end module bases are respectively reversely corresponding and the same as the shapes of the lower end faces of the left and right ends of the precast bridge deck. The special-shaped module bases are located between the corresponding sides of the left-end and right-end module bases. The shapes of the upper end faces of each special-shaped module base are reversely corresponding and the same as the corresponding shapes of the special-shaped parts of the lower end face of the precast bridge deck. Each splicing module base is spliced in the space between the left-end and right-end module bases and the sides of each special-shaped module base. The shapes of the upper end faces of each splicing module base are reversely corresponding and the same as the corresponding parts of the lower end face of the precast bridge deck. On each skirt plate located outside the modular spliced precast base, there are several socket fixing cylinders for inserting and fixing the lower ends of the column rods corresponding to the spliced mobile curing shed.

[0022] After spreading 2 - 3 mm thick leveling fine sand between the corner angle steels on the top surface of each module base made of concrete, weld a 5 mm thick steel plate on the surface to form the integral module base made of concrete.

[0023] (5) Precast bridge deck: Erect the side panels of the precast bridge deck on the modular spliced precast base. The wet joint and its shear key are made of C50 concrete. Ordinary Portland cement is used as the cement. The coarse aggregate is selected from limestone, basalt or granite with relatively small thermal expansion, and multi-graded or continuous grading is adopted. The slump of the concrete is 50 - 80 mm. It is transported by a small concrete transport vehicle to complete the pouring of the precast bridge deck.

[0024] (6) Construction of spliced mobile curing sheds: The construction of spliced mobile curing sheds is carried out synchronously with the construction progress of the prefabricated bridge deck. First, the two ends of the roof beam are connected to the docking flanges at the upper ends of the two vertical support rods through docking flanges, connecting bolts and nuts to form a door-shaped frame. The two ends of the cross beam are connected to the docking flanges corresponding to the upper parts of the two support rods through docking flanges, connecting bolts and nuts. The two ends of the vertical support rod are connected to the docking flanges corresponding to the middle parts of the roof beam and the cross beam through docking flanges, connecting bolts and nuts. The roof beam, cross beam, vertical support rod and two support rods connected together form a door-shaped support frame. Then, the plug-in parts at the lower ends of the support rods on both sides of each door-shaped support frame are inserted and fixed to the modular spliced prefabricated base. In the corresponding plug-in fixing cylinders on the two horizontal sides, several door-shaped support frames are arranged side by side longitudinally at intervals, and adjacent door-shaped support frames are connected to each other through the docking flanges, connecting bolts and nuts on the ends of the roof beams, edge longitudinal bars, ridge longitudinal bars and wall bars to form a spliced mobile health shed, and then a windproof plastic sheet or a waterproof windproof sheet is provided on the outer side of the spliced mobile health shed, and the lower end of the windproof plastic sheet or the waterproof windproof sheet is sealed with the lower end of the side of the modular spliced prefabricated base, and a door is provided at the lower part of the windproof plastic sheet or the waterproof windproof sheet on one longitudinal side to form a sealed spliced mobile health shed; one end of the reinforcement cable is fixed on the four sides of the upper end of the spliced mobile health shed, and the other end of the reinforcement cable is connected to the upper end of the steel rod fixed on the ground obliquely outward.

[0025] (7) Curing of precast bridge panels: The precast bridge panels are cured in a sealed mobile curing shed on the top of the modular precast base. Temperature control devices and spraying devices can be installed in the mobile curing shed according to climatic conditions to use steam curing or watering to cure the precast bridge panels. Attention should be paid to wind protection, heat preservation and protection from direct sunlight to reduce damage to the structure of the precast bridge panels caused by cold shrinkage and dry shrinkage.

[0026] The prefabricated bridge deck is moisturized and cured for no less than 14 days, and then moved out of the spliced mobile curing shed. When moving, the crane hook can be hooked on the ridge longitudinal beam of the spliced mobile curing shed, and the spliced mobile curing shed can be lifted as a whole, and moved in the air to any modular spliced prefabricated base of the completed concrete Taozhu prefabricated parts, and then lowered synchronously to align the plug-in part at the lower end of the spliced mobile curing shed and insert it into the corresponding plug-in fixing cylinder on the side of the modular spliced prefabricated base to achieve the indoor curing conditions.

[0027] (8) Storage of prefabricated bridge panels: The bridge panels should be placed in the prefabrication plant for no less than 3 months. The storage pedestals should be made of wooden pier support blocks. All support blocks should be placed on the same plumb line. Fixing and buffering measures should be taken during transportation.

[0028] As a preferred technical solution of the present invention, the length and width of each module base are based on the standard of being convenient for carrying and transportation.

[0029] Compared with the prior art, the beneficial effects that the present invention can achieve are as follows:

[0030] 1. The present invention has high safety performance. The modular spliced precast base adopts modular design, with fast installation speed, convenient use, easy turnover, and can be reused repeatedly. The shape change is simple and convenient, suitable for precasting of various components, not limited by the size of the components, not limited by the site scale, and solves the site space problem. The spliced mobile curing shed enables the curing of various precast components to be protected from harsh environments, can prevent cracks in bridge deck caused by strong winds and large temperature differences, can quickly form good precast conditions for precast components in harsh areas, avoids material waste and damage to the structure of various components caused by cracks, enhances the construction quality of precast components, and improves the durability of the structure.

[0031] 2. The present invention can be applied to precasting of various components such as beams, slabs, columns, etc. in low-temperature regions, with high construction efficiency, strong turnover ability, can better realize the precasting work of bridge deck components, improve construction efficiency and safety, can speed up the construction progress of the project, save construction costs, and reduce construction costs. For example, the construction method of the present invention was adopted for the bridge deck construction of the Inner Mongolia Suzhang Expressway from Sunite Right Banner to Huade (Inner Mongolia-Jilin Border) section highway project. It effectively solves problems such as precast site space, low temperature, strong winds, large temperature differences, cracks in areas with low air humidity, poor heat and moisture preservation effects, low turnover efficiency, and direct sunlight, improves the construction quality of precast components to ensure the durability of the structure, and achieves good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of the separated state of the modular spliced precast base of the present invention.

[0033] Figure 2 It is a schematic structural diagram of the combined state of the modular spliced precast base of the present invention.

[0034] Figure 3 It is a schematic docking structure diagram of the modular spliced precast base of the present invention.

[0035] Figure 4 It is a schematic bottom surface structure diagram of a modular spliced precast base of the present invention.

[0036] Figure 5 It is a schematic diagram of a partial structure inside the module base made of reinforced concrete.

[0037] Figure 6 It is a schematic diagram of a partial structure of the spliced mobile curing shed of the present invention.

[0038] Figure 7This is a schematic structural diagram of the usage state of the spliced and mobile curing shed of the present invention.

[0039] Among them: 1. Reinforcing support plate; 2. First splicing module base; 3. First special-shaped module base; 4. Second special-shaped module base; 5. Second splicing module base; 6. Third splicing module base; 7. Right-end module base; 8. Left-end module base; 9. Fastening bolt hole; 10. Skirt board; 11. Extended pillar; 12. Support flange; 13. Fastening bolt; 14. Gasket; 15. Fastening nut; 16. Docking screw hole; 17. Fixed plate; 18. Angle steel for corner wrapping; 19. Cement mortar layer; 20. Bolt hole embedded part; 21. Steel bar grid; 22. Edge longitudinal bar; 23. Ridge longitudinal bar; 24. Docking flange; 25. Roof beam bar; 26. Wall bar; 27. Vertical support bar; 28. Cross beam bar; 29. Pillar bar; 30. Limit disc; 31. Insertion part; 32. Cable; 33. Drift pin; 34. Windproof plastic cloth; 35. Door; 36. Short bar; 37. Connecting bolt; 38. Insertion fixing cylinder; 39. Insertion fixing cylinder embedded part. Specific embodiments

[0040] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present invention. The experimental methods, materials, reagents, control systems and related components and sensing technologies controlled thereby in the following embodiments, unless otherwise specified, are all conventional technologies and methods and can be obtained from commercial channels.

[0041] Embodiment:

[0042] As Figures 1 to 7 shown, a structure for prefabricating bridge deck in harsh areas and reducing cracks and its construction method. The present invention is composed of a modular spliced precast base and a spliced and mobile curing shed. The modular spliced precast base is formed by docking several module bases through adjacent sides to form an integral structure for providing a precast base for precast components. The spliced and mobile curing shed is inserted at the upper end of the modular spliced precast base to effectively improve the curing conditions of concrete components.

[0043] As Figures 1 to 4 shown, the peripheries of the upper end faces of the several module bases are rectangular. Each module base adopts a modular design, and the shape of the upper end face of each module base is reversely corresponding and the same as the shape of the corresponding bottom surface of the precast bridge deck. Reversely corresponding and the same means that for the protruding part of the bottom surface of the precast bridge deck, the corresponding part of the module base is a recessed part, and vice versa, except for the flat part.

[0044] The design of the base of each module of the present invention is divided into several standard section areas and non-standard section areas according to the lengths and bottom shapes of the precast bridge decks designed. The non-standard section areas include the beam ends at the bottom of the bridge deck and the special-shaped areas corresponding to the protrusions or recesses at the bottom of the bridge deck. The standard section areas include the areas corresponding to both ends at the bottom of the bridge deck and the common areas shared by each precast bridge deck outside the non-standard section areas. First, determine the lengths and upper surface shapes of the special-shaped module bases according to the non-standard section areas divided by the design, and then determine the lengths and upper surface shapes of the left-end module base 8, the right-end module base 7, and several splicing module bases according to the standard section areas divided by the design. The upper end area of the modular splicing precast base is larger than the bottom area of the largest precast bridge deck, and the larger areas located at the peripheries form a working area with a width of 1-2 m to facilitate personnel operation.

[0045] In this embodiment, the base of each module of the present invention is composed of a first splicing module base 2, a first special-shaped module base 3, a second special-shaped module base 4, a second splicing module base 5, a third splicing module base 6, a right-end module base 7, and a left-end module base 8. Skirt plates 10 are provided downward at the four sides of each module base. The skirt plates of each module base are respectively in the shape of a rectangular frame. The upper end surfaces of the skirt plates are abutted and fixedly connected with the corresponding lower edges of the module base to form an integral structure, and the lower end surfaces of the skirt plates are on the same plane. A number of fastening bolt holes 9 are provided at intervals on the adjacent skirt plates of the butt-jointed module bases. The fastening bolts 13 pass through the corresponding fastening bolt holes on the adjacent skirt plates of each module base and are fastened with the fixing nuts 15 through washers 14 to butt-joint each module base into an integral modular splicing precast base. A number of plug-in fixing cylinders 38 for inserting and fixing the lower ends of the support rods of the corresponding splicing mobile curing shed are provided on the skirt plates located outside the modular splicing precast base. A reinforcing support plate 1 is provided in the middle of the bottom surface of each module base to reinforce each module base.

[0046] Each module base is made of a steel plate with a thickness of 1-1.5 cm. A lengthening support column 11 is respectively provided at each of the four corners of the bottom surface of each module base for lengthening and flatly supporting each module base. The lengthening support column is made of an I-beam. The upper end surface of the lengthening support column is fixedly connected with the inner side surface of the upper end of each module base by welding through a fixing plate 17. A support flange plate 12 is provided at the lower end surface of the lengthening support column. A number of butt-joint screw holes 16 are provided at intervals around the support flange plate. The lower end surface of the support flange plate is on the same plane as the lower end surface of the skirt plate of each module base.

[0047] As Figure 5As shown in the figure, each module base can also be made of reinforced concrete. A steel bar grid 21 is provided inside each module base made of reinforced concrete. Angle steel 18 for corner wrapping is provided at the outer end corners of each module base. The inner end of the angle steel for corner wrapping is fixed integrally with the steel bar grid at the corresponding part. The upper end surface of the angle steel for corner wrapping located on the upper end surface of each module base is 2 - 3 mm higher than the upper end surface of the module base. The corresponding fastening bolt holes on the adjacent skirt plates of each module base are bolt hole embedded parts 20 fixed to the steel bar grid at the corresponding part inside the concrete. The plug-in fixing cylinders on the outer skirt plates of the modular spliced precast base are plug-in fixing cylinder embedded parts 39 fixed to the steel bar grid at the corresponding part inside the concrete. At the four corners of the bottom surface of the steel bar grid of each module base, a lengthening support column embedded part is fixed respectively. A layer of concrete mortar 19 with a thickness of 5 - 8 cm is poured outside the steel bar grid of each module base to form each module base made of reinforced concrete. The length and width of each module base are based on the standard of being convenient for carrying and transportation.

[0048] Transport each module base and its accessories to the construction site. The modular spliced precast base is spliced on a piece of land that does not require leveling, but it should be ensured that the upper end surfaces of each module base are horizontally arranged. For this purpose, the lower ends of each module base can be connected to the columns with flange plates at the upper end, or cushion stones, or skirt plates and strengthening support plates, etc., to ensure that when the upper end surfaces of each module base are horizontally arranged, the lower ends of each supporting object directly support on the solid ground. Pass the fastening bolts 13 through the corresponding fastening bolt holes 9 on the adjacent skirt plates of each module base and fasten them with the fixing nuts 15 through the gaskets 14 to connect each module base into one body to form the modular spliced precast base.

[0049] The left and right end module bases are respectively located at the left and right ends of the modular spliced precast base. The shapes of the upper end surfaces of the left and right end module bases are respectively reversely corresponding and the same as the shapes of the lower end surfaces of the left and right ends of the precast bridge deck. The first special-shaped module base 3 is located in the middle between the corresponding side surfaces of the left and right end module bases. The second special-shaped module base 4 is located on one side of the first special-shaped module base 3. The shapes of the upper end surfaces of each special-shaped module base are reversely corresponding and the same as the corresponding shapes of the special-shaped parts of the lower end surface of the precast bridge deck. The first, second, and third splicing module bases are respectively spliced in the spaces between the left and right end module bases and the side surfaces of each special-shaped module base. The shapes of the upper end surfaces of each splicing module base are reversely corresponding and the same as the corresponding parts of the lower end surface of the precast bridge deck. A number of plug-in fixing cylinders 38 for inserting and fixing the lower ends of the support rods of the corresponding splicing mobile curing shed are provided on each skirt plate located outside the modular spliced precast base.

[0050] After spreading 2 - 3 mm thick leveling fine sand between the angle steels for corner wrapping on the top surface of each module base made of concrete, a 5 mm thick steel plate is welded on the surface to form the modular spliced precast base made of concrete.

[0051] Erect the side panels of the precast bridge deck, wet joints and their shear grooves on the modular spliced precast base. Apply form oil to the top surfaces of the side panels and each module base within the side panels. Place the precast component steel bar grid as required. Use C50 concrete, with ordinary Portland cement for the cement. Select limestone, basalt or granite with relatively small thermal expansion for the coarse aggregate, and adopt multi-graded or continuous grading. The concrete slump is 50 - 80 mm. Transport it using a small concrete transport vehicle and complete the pouring of the precast bridge deck.

[0052] As Figure 6 and Figure 7 shown, the construction of the spliced mobile curing shed is carried out synchronously with the pouring progress of the precast bridge deck. At the initial construction, it should be ensured that when the pouring of the precast bridge deck is completed, the splicing and covering of the mobile curing shed are also completed at its upper end.

[0053] The mobile health preservation shed includes support poles 29, cross beams 28, roof beams 25, edge longitudinal poles 22, ridge longitudinal poles 23, vertical support poles 27, wall poles 26, and butt flange plates 24 provided at their upper ends, as well as windproof plastic sheets 34 or waterproof and windproof cloths. The upper end of the support pole 29 is provided with a butt flange plate 24 upward. The upper part of the support pole is fixed to one end of a vertical short pole 36 inward, and a butt flange plate is provided at the other end of the short pole. The middle part of the support pole is fixed to one end of a short pole arranged vertically in the longitudinal direction, and a butt flange plate is provided at the other end of the short pole. A limit disk 30 is provided at the lower part of the support pole to limit the length of the lower end of the support pole inserted and fixed in the plug-in fixed cylinder. The support pole at the lower end of the limit disk is an insertion part 31 inserted and fixed in the plug-in fixed cylinder. Butt flange plates 24 are provided at both ends of the cross beam, roof beam, edge longitudinal pole, ridge longitudinal pole, vertical support pole, and wall pole. The roof beam is arc-shaped. The middle part of the roof beam extends downward, the lower part extends longitudinally to both sides, and the middle part of the cross beam extends upward and is respectively fixed to one end of each vertical short pole. Butt flange plates are provided at the other ends of the respective short poles. During construction, first, both ends of the roof beam are connected to the butt flange plates at the upper ends of two vertically arranged support poles through butt flange plates, connecting bolts 37, and nuts to form a door-shaped frame. Both ends of the cross beam are respectively connected to the corresponding butt flange plates arranged at the upper parts of the two support poles through butt flange plates, connecting bolts, and nuts to form an integral body. Both ends of the vertical support pole are respectively connected to the corresponding butt flange plates arranged at the middle parts of the roof beam and the cross beam through butt flange plates, connecting bolts, and nuts to form an integral body. An integrated roof beam, cross beam, vertical support pole, and two support poles form a door-shaped support frame. Then, the insertion parts at the lower ends of the support poles on both sides of each door-shaped support frame are inserted and fixed in the corresponding plug-in fixed cylinders on the transverse sides of the modular spliced prefabricated base. A number of door-shaped support frames are arranged side by side longitudinally at intervals. Adjacent door-shaped support frames are interconnected through the butt flange plates, connecting bolts, and nuts at both ends of the roof beam, edge longitudinal pole, ridge longitudinal pole, and wall pole to form a spliced mobile health preservation shed frame. Then, a windproof plastic sheet or a waterproof and windproof cloth is provided on the outer side of the spliced mobile health preservation shed frame. The lower end of the windproof plastic sheet or the waterproof and windproof cloth is sealed with the lower end of the side surface of the modular spliced prefabricated base. A door 35 is provided at the lower part of the windproof plastic sheet or the waterproof and windproof cloth on one longitudinal side for personnel to enter and exit, forming a sealed spliced mobile health preservation shed. One end of a reinforcing cable 32 is respectively fixed to the middle parts of the four sides at the upper end of the spliced mobile health preservation shed frame. The other end of the reinforcing cable is obliquely outwardly connected to the upper end of a steel rod 33 fixed on the ground for strengthening the sealed spliced mobile health preservation shed.

[0054] Curing of the precast bridge deck is carried out in a spliced and mobile curing shed sealed at the upper end of the modular spliced precast base. According to the climate conditions, temperature control devices, spraying devices, etc. can be installed in the spliced and mobile curing shed to cure the precast bridge deck by steam curing or sprinkler curing. Attention should be paid to wind prevention, heat preservation, and prevention of direct sunlight to reduce the damage to the structure of the precast bridge deck caused by cold shrinkage and dry shrinkage. The moisture curing of the precast bridge deck shall not be less than 14 days, and then it is removed from the spliced and mobile curing shed.

[0055] When moving, disconnect the fixed reinforcement cables. The hook of the crane can be hooked on the ridge longitudinal beam of the spliced and mobile curing shed, and the whole spliced and mobile curing shed is lifted. It is moved in the air above any modular spliced precast base where the concrete casting precast member is completed, and then lowered synchronously so that the insertion part at the lower end of the spliced and mobile curing shed is aligned and inserted into the corresponding insertion fixing cylinder on the side of the modular spliced precast base to achieve the indoor curing conditions.

[0056] The bridge deck is placed in the precast factory for not less than 3 months. The storage pedestal is selected as a wooden pier support block, and all support blocks are on the same vertical line. Fixing and buffering measures are set during transportation.

[0057] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is less than that of the second feature.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A precast bridge deck structure for harsh areas and a structure for reducing cracks, including a left-end module base, characterized in that: The precast bridge deck in harsh areas and the structure for reducing cracks are composed of a modular splicing precast base and a splicing mobile curing shed. The modular splicing precast base is formed by docking several module bases through adjacent sides to form an integral structure for providing a precast base for precast components. The splicing mobile curing shed is inserted at the upper end of the modular splicing precast base to effectively improve the curing conditions of concrete components. The peripheries of the upper end faces of the several module bases are rectangular. Each module base adopts a modular design, and the shape of the upper end face of each module base is reversely corresponding and the same as the shape of the corresponding bottom surface of the precast bridge deck. At the four corners of the bottom surface of each module base, there is respectively a lengthening support column for lengthening and flatly supporting each module base. The lengthening support column is made of I-beam. The upper end face of the lengthening support column is fixed to the inner side of the upper end of each module base through a fixing plate. The lower end face of the lengthening support column is provided with a support flange plate. At intervals around the periphery of the support flange plate, there are several docking screw holes. The lower end face of the support flange plate is on the same plane as the lower end face of the skirt board of each module base.

2. The precast bridge deck structure for harsh areas and crack reduction according to claim 1, characterized in that: The modular splicing precast base is composed of a left-end module base, a right-end module base, several special-shaped module bases and several splicing module bases. The left-end and right-end module bases are respectively located at the left and right ends of the modular splicing precast base. The shapes of the upper end faces of the left-end and right-end module bases are reversely corresponding and the same as the shapes of the lower end faces of the left and right ends of the precast bridge deck respectively. The special-shaped module bases are located between the corresponding sides of the left-end and right-end module bases. The shapes of the upper end faces of the special-shaped module bases are reversely corresponding and the same as the corresponding shapes of the special-shaped parts of the lower end face of the precast bridge deck. Each splicing module base is spliced in the space between the left-end and right-end module bases and the sides of the special-shaped module bases. The shapes of the upper end faces of the splicing module bases are reversely corresponding and the same as the corresponding parts of the lower end face of the precast bridge deck. Skirt boards are provided downward on the four sides of each module base. The skirt boards of each module base are respectively in the shape of a rectangular frame. The upper end faces of the skirt boards are abutted and fixedly connected to the corresponding lower edges of the module bases to form an integral structure. The lower end faces of the skirt boards are on the same plane. At intervals on the adjacent skirt boards of the docked module bases, there are several fastening bolt holes. The fastening bolts pass through the corresponding fastening bolt holes on the adjacent skirt boards of each module base and are fastened with washers and fastening nuts to dock each module base into an integral modular splicing precast base. On the skirt boards located outside the modular splicing precast base, there are several insertion fixing cylinders for inserting and fixing the lower ends of the corresponding support struts of the splicing mobile curing shed. In the middle of the bottom surface of each module base, there is a reinforcing support plate.

3. The precast bridge deck structure for harsh areas and crack reduction according to claim 1 or 2, characterized in that: The module base is made of a steel plate with a thickness of 1 to 1.5 cm; or it is made of reinforced concrete. A steel bar grid is provided inside each module base made of reinforced concrete. Angle steel for edge protection is provided at the outer end corners of each module base. The inner end of the angle steel for edge protection is fixed integrally with the corresponding part of the steel bar grid. The upper end surface of the angle steel for edge protection located on the upper end surface of each module base is 2 to 3 mm higher than the upper end surface of the module base. The corresponding fastening bolt holes on the adjacent skirt boards of each module base are bolt hole embedded parts fixed to the corresponding part of the steel bar grid in the concrete. The plug-in fixing cylinder located on the outer skirt board of the modular splicing precast base is a plug-in fixing cylinder embedded part fixed to the corresponding part of the steel bar grid in the concrete.

4. The precast bridge deck structure for harsh areas and crack reduction according to claim 1, characterized in that: The spliced and movable curing shed is composed of support poles, cross beams, roof beams, edge longitudinal poles, ridge longitudinal poles, vertical support poles and wall poles. A docking flange is provided upward at the upper end of the support pole. The upper part of the support pole is fixed to one end of a vertical short pole inward. A docking flange is provided at the other end of the short pole. The middle part of the support pole is fixed to one end of a longitudinally vertical short pole. A docking flange is provided at the other end of the short pole. A limit disk is provided at the lower part of the support pole. The support pole at the lower end of the limit disk is a plug-in part inserted into the plug-in fixing cylinder. Docking flanges are provided at both ends of the cross beam, roof beam, edge longitudinal pole, ridge longitudinal pole, vertical support pole and wall pole. The roof beam is arc-shaped. The middle part of the roof beam extends downward, the lower part extends longitudinally to both sides, and the middle part of the cross beam extends upward and is respectively fixed to one end of each vertical short pole. Docking flanges are provided at the other ends of each short pole. Both ends of the roof beam are respectively connected to the docking flanges at the upper ends of two vertically arranged support poles through docking flanges, connecting bolts and nuts to form a portal frame. Both ends of the cross beam are respectively connected to the corresponding docking flanges on the upper parts of the two support poles through docking flanges, connecting bolts and nuts to form an integral body. Both ends of the vertical support pole are respectively connected to the corresponding docking flanges in the middle of the roof beam and the cross beam through docking flanges, connecting bolts and nuts to form an integral body. An integrated roof beam, cross beam, vertical support pole and two support poles form a portal support frame. A number of portal support frames are arranged longitudinally side by side at intervals. The adjacent portal support frames are mutually connected into an integral body through the docking flanges, connecting bolts and nuts at both ends of the roof beam, edge longitudinal pole, ridge longitudinal pole and wall pole to form a spliced and movable curing shed frame. A windproof plastic cloth or a waterproof and windproof cloth is provided on the outer side of the spliced and movable curing shed frame. One end of a reinforcing cable is fixed to each of the four sides at the upper end of the spliced and movable curing shed frame. The other end of the reinforcing cable is obliquely outwardly connected to the upper end of a steel rod fixed to the ground.

5. The precast bridge deck structure for harsh areas and crack reduction according to claim 4, characterized in that: The length of the plug-in part of the support pole at the lower end of the limit disk is the same as the length of the plug-in fixing cylinder, and the outer diameter of the plug-in part corresponds to the inner diameter of the plug-in fixing cylinder.

6. The precast bridge deck structure for harsh areas and crack reduction according to claim 4, characterized in that: The support pole, cross beam, roof beam, edge longitudinal pole, ridge longitudinal pole, vertical support pole, short pole and wall pole are steel rods, and the docking flanges are steel docking flanges with the same structure and shape.

7. A construction method using the structure for prefabricating bridge deck slabs in harsh areas and reducing cracks according to claim 1, characterized in that: It includes the following steps: (1) Design of each module base: According to the different lengths and bottom shapes of the designed precast bridge decks, it is divided into several standard section areas and non-standard section areas. The non-standard section areas include the beam ends at the bottom of the bridge deck and the special-shaped areas corresponding to the convex or concave parts at the bottom of the bridge deck. The standard section areas include the areas at both ends of the bottom of the corresponding bridge deck and the same areas shared by each precast bridge deck outside the non-standard section areas. First, determine the lengths and upper surface shapes of each special-shaped module base according to the non-standard section areas divided by the design, and then determine the lengths and upper surface shapes of the left-end module base, right-end module base, and several splicing module bases according to the standard section areas divided by the design; The upper end area of the modular splicing precast base is larger than the bottom area of the precast bridge deck, and the larger areas on each periphery form a working area with a width of 1-2m; (2) Preparation of each module base: Make the upper surface of each module base with a steel plate with a thickness of 1-1.5 cm according to the design. Weld skirt plates at the lower edges of the rectangular upper surfaces of each module base. Drill several fastening bolt holes at the same height on the same corresponding positions in the middle of each skirt plate. Install a reinforcing support plate in the middle of the bottom surface of each module base. Install a lengthening support column at each of the four corners of the bottom surface of each module base. The lower end surfaces of the lengthening support columns are on the same plane as the skirt plates and the lower end surfaces of the reinforcing support plates of each module base, forming each steel module base; Preparation of each reinforced concrete module base: Make the steel bar framework inside each module base by knitting and welding steel bars according to the design. Install angle steel at the outer corners of each module base. The inner end of the angle steel is fixed to the corresponding part of the steel bar framework as a whole. The upper surface of the angle steel at the upper end surface of each module base is 2-3 mm higher than the upper end surface of the module base. The corresponding fastening bolt holes on the adjacent skirt plates of each module base are bolt hole embedded parts fixed to the corresponding part of the steel bar framework in the concrete. The plug-in fixing cylinders on the outer skirt plates of the modular splicing precast base are plug-in fixing cylinder embedded parts fixed to the corresponding part of the steel bar framework in the concrete. Fix a lengthening support column embedded part at each of the four corners of the bottom surface of the steel bar framework of each module base. Pour a concrete mortar layer with a thickness of 5-8 cm on the outer surface of the steel bar framework of each module base, forming each module base made of reinforced concrete; The upper surface shape of each special-shaped module base is reversely corresponding and the same as the shape of the non-standard section area of the bottom surface of the designed precast bridge deck. The upper surface shapes of the left-end module base, right-end module base, and several splicing module bases are reversely corresponding and the same as the shape of the standard section area of the bottom surface of the designed precast bridge deck; (3) Prepare the support poles, cross beams, roof beams, edge longitudinal bars, ridge longitudinal bars, vertical support bars, and wall bars of the mobile curing shed and the docking flange plates provided at their upper ends, windproof plastic sheets or waterproof and windproof cloths, and prepare fastening bolts, gaskets, fixing nuts, connecting bolts, and nuts, and supports with flange plates at the upper ends; (4)Construction of modular spliced precast base: Transport each module base and accessories to the construction site. According to the shape and length of the lower end face of the precast bridge deck to be precast, splice the left-end module base, right-end module base, several special-shaped module bases and several splicing module bases. It should be ensured that the upper end faces of each module base are horizontally arranged. Therefore, the lower ends of each module base can butt against the columns with flange plates at the upper end, or cushion stones, or skirt plates and reinforced support plates through extended support columns to ensure that the lower ends of each abutting object directly abut on the solid ground. Pass the fastening bolts through the corresponding fastening bolt holes on the adjacent skirt plates of each module base and fasten them with washers and fastening nuts to connect each module base into an integrated modular spliced precast base. The left-end and right-end module bases are respectively located at the left and right ends of the modular spliced precast base. The shapes of the upper end faces of the left-end and right-end module bases are respectively reversely corresponding and the same as the shapes of the lower end faces of the left and right ends of the precast bridge deck. The special-shaped module bases are located between the corresponding sides of the left-end and right-end module bases. The shapes of the upper end faces of each special-shaped module base are reversely corresponding and the same as the corresponding shapes of the special-shaped parts of the lower end face of the precast bridge deck. Each splicing module base is spliced in the space between the left-end and right-end module bases and the sides of each special-shaped module base. The shapes of the upper end faces of each splicing module base are reversely corresponding and the same as the corresponding parts of the lower end face of the precast bridge deck. Several socket fixing cylinders for inserting and fixing the lower ends of the column rods of the corresponding spliced mobile curing shed are provided on each skirt plate located outside the modular spliced precast base; (5)Precast bridge deck: Erect the side panels of the precast bridge deck on the modular spliced precast base. The wet joints and their shear grooves are made of C50 concrete. Ordinary Portland cement is used for cement. Limestone, basalt or granite with relatively small thermal expansion is selected as the coarse aggregate, and multi-graded or continuous grading is adopted. The slump of the concrete is 50 - 80 mm. It is transported by a small concrete transport vehicle to complete the pouring of the precast bridge deck. (5)Precast bridge deck: Erect the side panels of the precast bridge deck on the modular spliced precast base. The wet joints and their shear grooves are made of C50 concrete. Ordinary Portland cement is used for cement. Limestone, basalt or granite with relatively small thermal expansion is selected as the coarse aggregate, and multi-graded or continuous grading is adopted. The slump of the concrete is 50 - 80 mm. It is transported by a small concrete transport vehicle to complete the pouring of the precast bridge deck. (6) Construction of the spliced and mobile curing shed: The construction of the spliced and mobile curing shed is carried out synchronously with the pouring progress of the precast bridge deck. First, the two ends of the roof beam rods are respectively connected to the docking flange plates at the upper ends of the two vertical support rods through docking flange plates, connecting bolts and nuts to form a portal-shaped frame. The two ends of the cross beam rods are respectively connected to the corresponding docking flange plates arranged on the upper parts of the two support rods through docking flange plates, connecting bolts and nuts to form a whole. The two ends of the vertical support rods are respectively connected to the corresponding docking flange plates arranged in the middle of the roof beam rods and the cross beam rods through docking flange plates, connecting bolts and nuts. A portal-shaped support frame is formed by connecting a roof beam rod, a cross beam rod, a vertical support rod and two support rods. Then, the insertion parts at the lower ends of the support rods on both sides of each portal-shaped support frame are inserted and fixed in the corresponding insertion fixing cylinders on the transverse sides of the modular spliced precast base. A number of portal-shaped support frames are arranged longitudinally side by side at intervals. The adjacent portal-shaped support frames are connected to each other through the docking flange plates, connecting bolts and nuts at both ends of the roof beam rods, edge longitudinal rods, ridge longitudinal rods and wall rods to form a spliced and mobile curing shed frame. Then, a windproof plastic cloth or a waterproof and windproof cloth is provided on the outer side of the spliced and mobile curing shed frame. The lower end of the windproof plastic cloth or the waterproof and windproof cloth is sealed with the lower end of the side of the modular spliced precast base. A door is provided at the lower part of the windproof plastic cloth or the waterproof and windproof cloth on one longitudinal side to form a sealed spliced and mobile curing shed; One end of the reinforcing cable is fixed on each of the four sides at the upper end of the spliced and mobile curing shed frame, and the other end of the reinforcing cable is obliquely connected to the upper end of the steel rod fixed on the ground; (7) Curing of the precast bridge deck: The precast bridge deck is cured in the sealed spliced and mobile curing shed on the upper end of the modular spliced precast base. A temperature control device and a spraying device can be set in the spliced and mobile curing shed according to the climate conditions to carry out steam curing or sprinkler curing on the precast bridge deck. Pay attention to wind prevention, heat preservation and prevention of direct sunlight to reduce the damage to the structure of the precast bridge deck caused by cold shrinkage and dry shrinkage; The precast bridge deck is kept moist and cured for no less than 14 days, and then removed from the spliced and mobile curing shed. When moving, the hook of the crane can be hooked on the ridge longitudinal beam of the spliced and mobile curing shed, and the spliced and mobile curing shed is lifted as a whole. It is moved in the air to the sky above any modular spliced precast base that has completed the concrete pouring precast member, and then lowered synchronously so that the insertion parts at the lower end of the spliced and mobile curing shed are aligned and inserted and fixed in the corresponding insertion fixing cylinders on the side of the modular spliced precast base to achieve the indoor curing conditions; (8) Storage of the precast bridge deck: The bridge deck is placed in the precast factory for no less than 3 months. The storage pedestal is selected as a wooden pier support block. All support blocks are on the same vertical line. Fixing and buffering measures are set during transportation.

8. The method according to claim 7, wherein: The length and width of each module base are based on the standard of being easy to carry and transport.

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