Easily-demoulded UHPC waffle lattice bridge deck slab mould and construction method thereof

Abstract

The invention provides an easy-to-demould UHPC waffle lattice bridge deck mould and a construction method thereof. The easy-to-demould UHPC waffle lattice bridge deck mould comprises an I-shaped steel seat, a bottom mould template flatly laid on the I-shaped steel seat, a plurality of waffle plate type mould boxes connected with the bottom mould template through bolts, and a side mould assembly arranged around the outer side of the bottom mould template, and the side mould assembly is positioned and connected to the I-shaped steel seat. A plurality of die box holes are formed in the upper end face of the bottom die template in a linear array mode, first steel die boxes or second steel die boxes are arranged above the die box holes in a sealed mode, the number of the first steel die boxes or the number of the second steel die boxes is at least one, and pattern draft angles are arranged on the outer sides of the first steel die boxes and the outer sides of the second steel die boxes. And the bottom die template is clamped on the I-shaped steel seat. According to the easily-demoulded UHPC waffle lattice bridge deck slab mould and the construction method thereof, the technical problems of demoulding damage, slurry leakage and low positioning precision of a traditional UHPC bridge deck slab mould are avoided, the demoulding force is reduced, and UHPC concrete edges and corners are protected.

Description

Technical Field

[0001] This invention belongs to the field of bridge precast component construction technology, specifically relating to an easy-to-demold UHPC waffle bridge deck mold and its construction method. Background Technology

[0002] Bridge deck formwork is divided into four categories: A, B, C, and D. Each category is further divided into three types, for a total of 12 types. The formwork is mainly made of stainless steel composite plates and consists of bottom formwork, waffle plate formwork, transverse side formwork, and longitudinal side formwork.

[0003] When used in practice, bridge deck formwork needs to have the following functions: (1) precise positioning and tensioning of the precast slab reinforcement mesh; (2) precise control of the shape and dimensions of the precast slab; (3) sufficient strength, rigidity and stability, good repeatability, and reusability; (4) need to be used in conjunction with pouring, vibration and curing equipment, and there should be no interference; (5) the surface of the mold should be sufficiently smooth (Ra≤0.4μm). Before use, new molds should be thoroughly ground and polished to reduce minor surface defects, reduce the friction between the concrete and the formwork surface, and reduce the generation of air bubbles.

[0004] However, traditional UHPC bridge deck molds use an integrated waffle grid structure for casting, which has technical problems such as demolding damage, grout leakage, and low positioning accuracy. In particular, the existing waffle grid structure has a demolding force that is up to three times that of conventional molds due to negative pressure adsorption, and the existing technology relies on mechanical pushing, which can easily damage the edges and corners of the concrete. Summary of the Invention

[0005] The purpose of this invention is to provide an easy-to-demold UHPC waffle bridge deck mold and its construction method, which solves the technical problems of demolding damage, grout leakage and low positioning accuracy of traditional UHPC bridge deck molds. By designing a modular and detachable waffle structure, the demolding force is reduced and the edges of UHPC concrete are protected.

[0006] A UHPC waffle bridge deck mold with easy demolding includes an I-beam base, a bottom mold template laid flat on the I-beam base, a plurality of waffle plate mold boxes connected to the bottom mold template by bolts, and a side mold assembly arranged around the outside of the bottom mold template, wherein the side mold assembly is positioned and connected to the I-beam base.

[0007] The upper end face of the bottom mold template is provided with a plurality of mold box holes arranged in a straight line array. A steel mold box one or a steel mold box two is closed above the mold box holes. The steel mold box one or the steel mold box two each have at least one row. The outer sides of the steel mold box one and the steel mold box two are provided with draft angles.

[0008] The upper end face of the bottom mold template and both sides of the first row of steel mold boxes are respectively provided with upper grooves, and the bottom surface of the bottom mold template and the lower part of the first row of steel mold boxes are provided with lower grooves, which are engaged on the I-beam base.

[0009] The bottom of the steel mold box is provided with a downward opening and the top is closed. Both ends of the steel mold box are respectively provided with a through long wedge-shaped groove. The two inner sides of the long wedge-shaped groove are inclined surfaces, which are wider at the top and narrower at the bottom. A wedge-shaped wooden strip is separately inserted in the long wedge-shaped groove.

[0010] The bottom of the steel mold box 2 is provided with a downward opening 2 and the top is closed;

[0011] The four outer sides of both the first and second steel mold boxes are draft surfaces that are wider at the top and narrower at the bottom, and their edges are all positioned and connected to the bottom mold template by fastening bolts.

[0012] The side mold assembly includes two parallel longitudinal side molds, and two parallel transverse side molds, which are connected end to end and surround the outside of the bottom mold template.

[0013] The longitudinal side formwork is provided with multiple rebar through holes 1, the transverse side formwork 1 is provided with multiple rebar through holes 2, and the transverse side formwork 2 is provided with multiple rebar through holes 3. Rubber sealing rings are provided at the positions of the rebar through holes 1, 2, and 3.

[0014] Rubber sealing rings can be used to seal the holes in the reinforcing bars, which helps to prevent grout leakage.

[0015] UHPC concrete is poured on top of the bottom formwork to form a bridge deck; groove structures are provided on both sides of the bridge deck, and a step structure is provided at the end of the bridge deck. The groove structure matches and fits the inner side of the longitudinal side formwork, and the step structure matches and fits the inner side of the transverse side formwork one or the transverse side formwork two.

[0016] Multiple reinforcing bars are threaded through the bridge deck in both the transverse and longitudinal directions. Since there are gaps between adjacent steel formwork boxes, between adjacent steel formwork boxes, and between steel formwork boxes, the reinforcing bars pass through these gaps and finally mix with the concrete to solidify.

[0017] The I-beam base includes a square frame, a horizontal bar and a vertical bar fixed vertically inside the square frame, wherein the horizontal bar and the vertical bar are arranged perpendicularly.

[0018] The steel bars on the bridge deck are multi-layered, with a horizontal spacing of 100mm and a vertical spacing of 110mm, forming a steel mesh.

[0019] A construction method for an easy-to-demold UHPC waffle bridge deck mold includes the following steps:

[0020] Step S1: Lay the I-beam base horizontally;

[0021] Step S2: Install the bottom mold template. Lay steel mold box one and steel mold box two on top of the bottom mold template. Seal the joints with glass glue. After grinding the contact surface to Ra≤0.4μm, apply non-oil-based release agent to the outside of steel mold box one and steel mold box two. Insert the wedge-shaped wooden strips into the long wedge-shaped grooves on steel mold box one.

[0022] Step S3: Position the longitudinal side mold, transverse side mold one, and transverse side mold two on the I-beam base with bolts to cover the outside of the bottom mold template;

[0023] Step S4: Insert reinforcing bars into reinforcing bar hole one, reinforcing bar hole two, and reinforcing bar hole three to form a reinforcing bar mesh;

[0024] Step S5: Pour UHPC concrete onto the top of the bottom formwork and vibrate it;

[0025] Step S6: After the pouring and curing are completed, the formwork is removed.

[0026] In step S6, the demolding sequence is as follows:

[0027] Step S61: Loosen the connecting bolts between the bottom mold template and the side mold assembly, and loosen the fastening bolts between the bottom mold template and steel mold box one and steel mold box two, so as to separate the bottom mold template from the side mold assembly, steel mold box one and steel mold box two, thereby removing the bottom mold template;

[0028] Step S62: Loosen the positioning bolts between the longitudinal side formwork and the first and second transverse side forms, and use a chain hoist to demold the side formwork assembly from the poured and cured concrete;

[0029] Step S63: Since the bottom of the mold box hole is sealed with a sealing plate, and a through air hole is provided on the sealing plate, 0.5-0.8MPa compressed air is injected through the through air hole to break the adsorption force, thereby demolding the steel mold box one and steel mold box two from the concrete. Finally, steel mold box one and steel mold box two are removed to achieve demolding.

[0030] Even better, the bottom mold template can be a shell structure with an open and closed bottom. This way, by simply setting a vent hole at the bottom and introducing gas into it, negative pressure during demolding can be avoided, and the adhesion force can be broken quickly and cost-effectively. The specific location of the vent hole can be adjusted according to the actual situation, and will not be detailed here.

[0031] The technical features not described in detail in this solution can be understood and implemented by those skilled in the art, and will not be elaborated further here.

[0032] This invention achieves the following significant effects:

[0033] (1) The outer surfaces of steel mold box one and steel mold box two are the demolding surfaces. The adhesion between the concrete and the overall "waffle" mold is very strong, making it difficult to demold the whole. However, the "waffle" mold designed in this scheme is divided into parts to form independent small "waffles", namely multiple steel mold boxes one and multiple steel mold boxes two, which reduces the adhesion between the mold and the concrete. In addition, through air holes are added to the "waffle", which further reduces the "vacuum effect" between the concrete and the mold, thus making demolding easier.

[0034] In order to install each individual small "waffle" mold more accurately, bolt holes are made on the base plate mold and the corresponding individual small "waffle" molds, and the two molds are connected and precisely positioned by bolts.

[0035] (2) Five through air holes are set on the closed plate, and 0.5~0.8MPa compressed air is used to break the negative pressure adsorption. Experimental analysis has confirmed that it can evenly offset more than 90% of the negative pressure adsorption force, and realize pneumatic demolding.

[0036] (3) The side mold assembly is connected by high-strength bolts and the assembly sequence of "side mold wrapping bottom mold template" is adopted. The construction method includes high-precision template installation, pneumatic demolding and other processes. Compressed air is injected in three pulses (0.5MPa→0.65MPa→0.8MPa), which improves the demolding efficiency by 60%, achieves a surface finish of Ra≤0.4μm and a repeatability accuracy of <2mm, and realizes modular disassembly.

[0037] (4) Rubber sealing rings are installed at the three locations of the rebar hole 1, rebar hole 2 and rebar hole 3 in this scheme, which helps to seal the rebar hole and prevent grout leakage; the fastening bolts on the steel formwork box also avoid the problem of grout leakage; steel formwork box 1 and steel formwork box 2 are laid on the top of the bottom formwork, and glass glue is applied to seal their joints. Through the above sealing process, the problem of grout leakage is basically solved.

[0038] (5) It should be noted that, in addition to the installation dimensional tolerances that need to be noted, the waffle structure set up in this scheme also improves the positioning accuracy. Due to the modular installation method of the waffle structure, targeted adjustments can be made for areas with low positioning accuracy. With the modular step-by-step demolding process, that is, multiple steel mold box one and multiple steel mold box two can be disassembled one by one, avoiding the damage to the concrete bridge deck caused by the previous overall mold disassembly, which helps to maintain dimensional accuracy.

[0039] (6) After testing and analysis, the demolding damage rate of this solution is basically reduced to 0; pneumatic demolding avoids mechanical impact and improves precision and lifespan; modular structure, deformation <1.5mm after 200 uses, overall cost reduced by 40%, demolding efficiency improved and equipment occupation time reduced; this solution combines pneumatic breaking negative pressure adsorption and sealing structure to achieve good sealing and easy demolding comprehensive technical effect. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the connection structure between the bridge deck and the bridge deck mold in this invention.

[0041] Figure 2 This is a schematic diagram of the bridge deck mold in this invention.

[0042] Figure 3 This is a schematic diagram of the connection structure between the side mold assembly and the waffle plate template in this invention.

[0043] Figure 4 This is a schematic diagram of the connection structure between the I-beam base and the waffle plate template in this invention.

[0044] Figure 5 This is a schematic diagram of the structure of the Chinese fu board template of the present invention.

[0045] Figure 6 This is the front view of the Chinese fu board template of the present invention.

[0046] Figure 7 This is a partial structural diagram of the Chinese wafu board template of the present invention (with part of the steel mold box removed).

[0047] Figure 8 This is a schematic diagram of the structure of the steel mold box II in this invention.

[0048] Figure 9 This is a schematic diagram of the connection structure between the side mold assembly and the I-beam base in this invention.

[0049] Figure 10 This is a schematic diagram of the bridge deck structure in this invention.

[0050] Figure 11 This is a schematic diagram of the structure of the I-beam base in this invention.

[0051] The attached diagram is labeled as follows: 1. I-beam base; 2. Longitudinal side formwork; 3. Reinforcing bar one; 4. Reinforcing bar two; 5. Transverse side formwork one; 6. Reinforcing bar three; 61. Reinforcing bar four; 7. Bridge deck; 8. Through hole; 9. Lifting hole; 10. Transverse side formwork two; 11. Bottom formwork template; 111. Upper groove; 112. Lower groove; 12. Steel formwork box one; 121. Wedge-shaped wooden strip; 13. Steel formwork box two; 131. Formwork box hole; 132. Fastening bolt; 133. Intermediate plate. Detailed Implementation

[0052] To more clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0053] See Figures 1-11 A UHPC waffle bridge deck mold that is easy to demold includes an I-beam base 1, a bottom mold template 11 laid flat on the I-beam base 1, a plurality of waffle plate mold boxes connected to the bottom mold template 11 by bolts, and a side mold assembly arranged around the outside of the bottom mold template 11. The side mold assembly is positioned and connected to the I-beam base 1.

[0054] The upper end face of the bottom mold template 11 is provided with a plurality of mold box holes 131 arranged in a straight line array. A steel mold box one 12 or a steel mold box two 13 is closed above the mold box holes 131. Each of the steel mold box one 12 or the steel mold box two 13 has at least one row. The four outer sides of the steel mold box one 12 and the steel mold box two 13 are provided with draft angles.

[0055] The upper end face of the bottom mold template 11 and the two sides of one of the steel mold boxes 12 are respectively provided with upper grooves 111, and the bottom surface of the bottom mold template 11 and the lower part of the steel mold box 12 are provided with lower grooves 112. The lower grooves 112 are engaged on the I-beam base 1.

[0056] Reinforcing bars can be inserted into the upper groove 111, and concrete is poured into it and fixedly connected to the reinforcing bars.

[0057] The bottom of the steel mold box 12 is provided with a downward opening and the top is closed. Both ends of the steel mold box 12 are respectively provided with a through long wedge-shaped groove. The two inner sides of the long wedge-shaped groove are inclined surfaces, which are wider at the top and narrower at the bottom. A wedge-shaped wooden strip 121 is separately inserted in the long wedge-shaped groove.

[0058] The bottom of the steel mold box 213 has a downward-facing opening and the top is closed;

[0059] The four outer sides of steel mold box 12 and steel mold box 2 are all draft surfaces that are wider at the top and narrower at the bottom, and their edges are all positioned and connected to the bottom mold template 11 by fastening bolts 132.

[0060] To facilitate the disassembly of steel mold box 12 and steel mold box 23, the outer draft surface makes the steel mold box wider at the top and narrower at the bottom. At the same time, the fastening bolt 132 passes through the steel mold box from top to bottom. During disassembly, the steel mold box 12 and steel mold box 23 are slowly lifted upward by the fastening bolt 132.

[0061] The purpose of setting the long wedge-shaped groove and wedge-shaped wooden strip 121 is to facilitate sealing and disassembly. Due to its flexibility, the wedge-shaped wooden strip 121 helps to buffer the stress generated during concrete solidification, and helps to avoid cracking during solidification and mold opening.

[0062] More preferably, a square-shaped intermediate plate 133 (an intermediate plate is also provided in steel mold box 12) is fixed to the bottom end of steel mold box 2 13, and is fixed to the outer edge of mold box hole 131 by the intermediate plate 133. The intermediate plate 133 is provided to increase the contact surface between steel mold box 2 13 or steel mold box 12 and bottom mold template 11, so as to facilitate sealing.

[0063] The side mold assembly includes two parallel longitudinal side molds 2, a parallel transverse side mold 1 5, and a parallel transverse side mold 2 10, which are connected end to end and surround the outside of the bottom mold template 11.

[0064] Multiple rebar through holes 1 are provided on the longitudinal side formwork 2, multiple rebar through holes 2 are provided on the transverse side formwork 1 5, and multiple rebar through holes 3 are provided on the transverse side formwork 2 10. Rubber sealing rings are provided at the positions of rebar through holes 1, 2 and 3.

[0065] The longitudinal side mold 2 is fastened to the transverse side mold 5 and the transverse side mold 10 with bolts. The position of the bolts is adjusted according to the actual situation.

[0066] The number, specific location, and arrangement of the first and second rebar holes can be adjusted adaptively according to actual production requirements. Rebars are inserted into the rebar holes, which will not be described in detail here.

[0067] It should be noted that the inner shape and structure of the longitudinal side formwork 2, the transverse side formwork 1 5 and the transverse side formwork 2 10 are not limited. They can be designed adaptively according to the shape of the concrete bridge deck, as long as they match the external shape of the concrete bridge deck. This is hereby stated.

[0068] Among them, the lower end of the longitudinal side formwork 2 has a reinforcing bar 3 through the reinforcing bar hole 1, and the upper end of the longitudinal side formwork 2 has a reinforcing bar 4 through the reinforcing bar hole 2. The transverse side formwork 15 has a reinforcing bar 6 through it, and the transverse side formwork 20 has a reinforcing bar 61 through it.

[0069] UHPC concrete is poured on top of the bottom formwork 11 to form the bridge deck 7. Grooves are provided on both sides of the bridge deck 7, and steps are provided at the ends of the bridge deck 7. The grooves match the inner side of the longitudinal side formwork 2, and the steps match the inner side of the transverse side formwork 5 or the transverse side formwork 10. Regarding the structure of the concrete bridge deck 7, there are various structures in practical applications. This solution only describes one scenario for illustrative purposes. However, the bridge deck mold of this solution can be applied to the design and manufacture of various bridge deck structures according to the required bridge deck structure. This is hereby stated.

[0070] Multiple reinforcing bars are threaded through the bridge deck 7 in both the transverse and longitudinal directions. These reinforcing bars also pass through reinforcing bar holes one and two.

[0071] More preferably, a lifting hole 9 is provided above the bottom formwork template 11, and a lifting bolt is installed in the lifting hole 9. The concrete is hooked onto the lifting bolt by external lifting equipment, and after the concrete has solidified, the formwork is disassembled and the entire concrete bridge deck is lifted.

[0072] The I-beam support 1 includes a square frame, horizontal bars and vertical bars fixed inside the square frame, with the horizontal bars and vertical bars arranged perpendicularly. The I-beam support 1 mainly serves a supporting function and can be movably or fixedly connected to the bottom formwork template 11, but it needs to be fixedly connected to the side formwork assembly by bolts to achieve a seal.

[0073] A construction method for an easy-to-demold UHPC waffle bridge deck mold includes the following steps:

[0074] Step S1: Lay the I-beam base 1 horizontally;

[0075] Step S2: Install the bottom mold template 11. Lay steel mold box one 12 and steel mold box two 13 on top of the bottom mold template 11. Seal the joints with glass glue. After grinding the contact surface to Ra≤0.4μm, apply non-oil-based release agent to the outside of steel mold box one 12 and steel mold box two 13. Insert the wedge-shaped wooden strip 121 into the long wedge-shaped groove on the steel mold box one 12.

[0076] Step S3: Position the longitudinal side mold 2, the transverse side mold 1 5 and the transverse side mold 2 10 on the I-beam base 1 with bolts to cover the outside of the bottom mold template 11;

[0077] Step S4: Insert reinforcing bars into reinforcing bar hole one, reinforcing bar hole two, and reinforcing bar hole three to form a reinforcing bar mesh;

[0078] Step S5: Pour UHPC concrete onto the top of the bottom formwork 11;

[0079] Step S6: After the pouring and curing are completed, the formwork is removed.

[0080] In step S6, the demolding sequence is as follows:

[0081] Step S61: Loosen the connecting bolts between the bottom mold template 11 and the side mold assembly, and loosen the fastening bolts between the bottom mold template 11 and the first steel mold box 12 and the second steel mold box 13, so that the bottom mold template 11 is separated from the side mold assembly, the first steel mold box 12 and the second steel mold box 13, thereby removing the bottom mold template 11;

[0082] Step S62: Loosen the positioning bolts between the longitudinal side formwork 2 and the transverse side formwork 1 5 and the transverse side formwork 2 10, and use a chain hoist to demold the side formwork assembly from the poured and cured concrete;

[0083] Step S63: Since the bottom of the mold box hole 131 is sealed with a sealing plate, and a through air hole is provided on the sealing plate, 0.5-0.8MPa compressed air is injected through the through air hole to break the adsorption force, and the steel mold box 12 and steel mold box 23 are demolded from the concrete. Finally, the steel mold box 12 and steel mold box 23 are removed to achieve demolding.

[0084] The specific working process of this invention is as follows:

[0085] Preparations before construction:

[0086] (1) First check the flatness and smoothness of the I-beam base 1, bottom formwork template 11, and side formwork assembly, and remove the ash and slag;

[0087] (2) Check whether the gaps between each steel formwork panel are within the allowable range and whether the joints of the steel formwork are tight;

[0088] (3) The contact surfaces of the bottom formwork 11, the steel formwork box 12, the steel formwork box 2, and the concrete should be coated with a release agent. The release agent must not be a mixture of waste engine oil and waste diesel oil. When applying the release agent, pay attention to the amount of oil being small and even, ensuring that there is no missed application and no accumulation on the board surface. The performance of the release agent must not affect the bonding performance of the structural adhesive.

[0089] Construction process of bottom formwork:

[0090] (1) First, lay a layer of I-beam base 1 on the ground, and then lay a layer of bottom formwork template 11 on the I-beam base 1. The overall size of the bottom formwork template 11 is 100mm longer on each side than the design size, so that the installation position of the side formwork components will be reserved in advance.

[0091] The elevation of the bottom formwork template 11 is adjusted using a level and a spirit level to ensure the flatness of the bottom formwork template 11 and the overall elevation of the mold. Steel mold box 12 and steel mold box 23 are laid out on the bottom formwork template 11 according to the dimensions in the design drawings.

[0092] (2) The bottom end of the mold box hole 131 on the bottom mold template 11 is connected to the closed plate with bolts. The suction effect generated by the "negative pressure" is fully considered in the design of the "waffle board" template. Five air holes are added to the bottom of each closed plate. The pneumatic demolding process is adopted. When demolding, compressed air (0.5-0.8MPa) is injected from the mold gap to break the local suction force, so as to facilitate the bottom demolding.

[0093] The overall assembly method is as follows: bottom formwork installation → steel formwork box installation → side formwork installation. The quality and installation accuracy of the formwork directly affect the manufacturing accuracy of the board; therefore, the formwork installation process should be strictly controlled.

[0094] UHPC concrete has high fluidity, and even tiny gaps between formwork panels can cause grout leakage, affecting the uniformity and strength development of the UHPC concrete. Therefore, grout leakage is strictly prohibited at formwork joints. After pouring the UHPC concrete, the top surface of the UHPC concrete should be flush with the top surfaces of steel formwork box 12 and steel formwork box 23, meaning that the four outer surfaces of steel formwork box 12 and steel formwork box 23 should be submerged in the concrete. After vibration and solidification, the formwork is finally dismantled.

[0095] This plan involves organizing mold acceptance testing after mold installation, with specific inspection precision as follows:

[0096] Table 1. Inspection Results of Mold Assembly Dimensions

[0097] Serial Number Inspection indicators accuracy 1 Mold construction deformation <1mm 2 Rebar positioning hole diameter error ≤0.5mm 3 Single-sided hole group position error ≤1mm 4 Concentricity error of the two-sided hole group ≤1mm 5 Mold surface flatness <2mm 6 Straightness of mold surface perimeter ≤1mm / 1m 7 mold length and width error 2% and ≤3mm 8 Overall mold height error ≤2mm

[0098] As can be seen from the table above, combined with existing building construction technical standards, the dimensional accuracy of the mold assembly in this scheme is high, and the prepared concrete bridge deck fully meets the usage requirements.

[0099] The technical features of this invention not described can be implemented by or using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this invention, and this invention is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention should also be within the protection scope of this invention.

Claims

1. A UHPC waffle bridge deck mold for easy demolding, characterized in that, It includes an I-beam base (1), a bottom mold template (11) laid flat on the I-beam base (1), a plurality of waffle plate mold boxes connected to the bottom mold template (11) by bolts, and a side mold assembly arranged around the outside of the bottom mold template (11), the side mold assembly being positioned and connected to the I-beam base (1).

2. The UHPC waffle bridge panel mold for easy demolding according to claim 1, characterized in that, The upper end face of the bottom mold template (11) is provided with a plurality of mold box holes (131) arranged in a straight line array. A steel mold box one (12) or a steel mold box two (13) is closed above the mold box holes (131). The steel mold box one (12) or the steel mold box two (13) has at least one row. The outer sides of the steel mold box one (12) and the steel mold box two (13) are provided with draft angles. The upper end face of the bottom mold template (11) and both sides of the first row of steel mold boxes (12) are respectively provided with upper grooves (111), and the bottom surface of the bottom mold template (11) and the lower part of the first row of steel mold boxes (12) are provided with lower grooves (112). The lower grooves (112) are engaged on the I-beam base (1).

3. The UHPC waffle bridge panel mold for easy demolding according to claim 2, characterized in that, The bottom end of the steel mold box (12) is provided with a downward opening and the top end is closed. Both ends of the steel mold box (12) are respectively provided with a through long wedge-shaped groove. The two inner sides of the long wedge-shaped groove are inclined surfaces, which are wider at the top and narrower at the bottom. A wedge-shaped wooden strip (121) is separately inserted in the long wedge-shaped groove. The bottom of the steel mold box 2 (13) is provided with a downward opening and the top is closed; The four outer sides of the first steel mold box (12) and the second steel mold box (13) are all draft surfaces that are wider at the top and narrower at the bottom, and their edges are all positioned and connected to the bottom mold template (11) by fastening bolts (132).

4. The UHPC waffle bridge panel mold for easy demolding according to claim 3, characterized in that, The side mold assembly includes two parallel longitudinal side molds (2), a parallel transverse side mold one (5) and a transverse side mold two (10), which are connected end to end and arranged around the outside of the bottom mold template (11); The longitudinal side mold (2) is provided with multiple steel bar through holes one, the transverse side mold one (5) is provided with multiple steel bar through holes two, and the transverse side mold two (10) is provided with multiple steel bar through holes three. Rubber sealing rings are provided at the positions of steel bar through holes one, steel bar through holes two and steel bar through holes three.

5. The UHPC waffle bridge panel mold for easy demolding according to claim 4, characterized in that, UHPC concrete is poured on top of the bottom formwork template (11) to form a bridge deck (7); groove structures are provided on both sides of the bridge deck (7), and a step structure is provided at the end of the bridge deck (7). The groove structure matches and fits the inner side of the longitudinal side formwork (2), and the step structure matches and fits the inner side of the transverse side formwork one (5) or the transverse side formwork two (10). Multiple steel bars are inserted into the bridge deck (7) in both the transverse and longitudinal directions.

6. The UHPC waffle bridge panel mold for easy demolding according to claim 1, characterized in that, The I-beam base (1) includes a square frame, a horizontal bar and a vertical bar that are vertically fixed inside the square frame, and the horizontal bar and the vertical bar are arranged perpendicularly.

7. The UHPC waffle bridge panel mold for easy demolding according to claim 5, characterized in that, The steel bars on the bridge deck are multi-layered, with a horizontal spacing of 100mm and a vertical spacing of 110mm, forming a steel mesh.

8. A construction method for an easily demolded UHPC waffle bridge deck mold, used to prepare an easily demolded UHPC waffle bridge deck mold as described in any one of claims 1-7, characterized in that, Specifically, the steps include the following: Step S1: Lay the I-beam base horizontally (1); Step S2: Install the bottom mold template (11). Lay steel mold box one (12) and steel mold box two (13) on top of the bottom mold template (11). Seal the joints with glass glue. After grinding the contact surface to Ra≤0.4μm, apply non-oil-based release agent to the outside of steel mold box one (12) and steel mold box two (13). Insert the wedge-shaped wooden strip (121) into the long wedge-shaped groove on the steel mold box one (12). Step S3: Position the longitudinal side mold (2), the transverse side mold one (5) and the transverse side mold two (10) on the I-beam base (1) to cover the outside of the bottom mold template (11); Step S4: Insert reinforcing bars into reinforcing bar hole one, reinforcing bar hole two, and reinforcing bar hole three to form a reinforcing bar mesh; Step S5: Pour UHPC concrete onto the top of the bottom formwork template (11); Step S6: After the pouring and curing are completed, the formwork is removed.

9. The construction method of an easily demolded UHPC waffle bridge deck mold according to claim 8, characterized in that, In step S6, the demolding sequence is as follows: Step S61: Loosen the connecting bolts between the bottom mold template (11) and the side mold assembly, loosen the fastening bolts between the bottom mold template (11) and the first steel mold box (12) and the second steel mold box (13), so that the bottom mold template (11) is separated from the side mold assembly, the first steel mold box (12) and the second steel mold box (13), thereby removing the bottom mold template (11). Step S62: Loosen the positioning bolts between the longitudinal side formwork (2) and the transverse side formwork one (5) and the transverse side formwork two (10), and use a chain hoist to demold the side formwork assembly from the poured and cured concrete; Step S63: Since the bottom of the mold box hole (131) is closed by a sealing plate, and a through air hole is provided on the sealing plate, 0.5-0.8MPa compressed air is injected through the through air hole to break the adsorption force, and the steel mold box one (12) and steel mold box two (13) are demolded from the concrete. Finally, steel mold box one (12) and steel mold box two (13) are removed to achieve demolding.

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