Curved surface corrugated steel web grouting and leaking stoppage formwork and using method thereof

Abstract

The invention discloses a curved surface corrugated steel web grouting and leaking stoppage formwork and a using method thereof, and belongs to the technical field of bridge engineering. The formwork is a combined steel member, a top plate bottom formwork and two outer side formworks are jointly and detachably spliced to form a formwork cavity used for pouring top plate concrete, and the faying faces of the top plate bottom formwork and the outer side formworks and a corrugated steel web are matched with the corrugated steel web in shape. Transverse supporting plates in the outer side mold comprise wave crest supporting plates and wave trough supporting plates which are arranged in parallel at intervals, the wave crest supporting plates and the wave trough supporting plates are arranged right opposite to the binding faces in the side mold bottom plates, and the transverse supporting plates and the longitudinal supporting plates are orthogonally arranged on the bottom faces of the side mold bottom plates; the attaching connecting plate is used for detachably connecting the side die bottom plate and the corrugated steel web, and connecting holes corresponding to bolt holes in the corrugated steel web are formed in the attaching connecting plate. The template can achieve the effects of stopping grout and leaking stoppage; and the strength is high, and the deformation degree of the top plate and the wing plate in the concrete pouring process can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and more specifically, to a grout stoppage and leakage plugging formwork for a curved corrugated steel web and its usage method. Background Art

[0002] In the field of bridge engineering, for the construction of traditional steel-concrete composite beam bridges, support formworks for the top plate and the bottom plate are mostly made of wooden plywood, and then concrete is poured to form a whole. For the box girder composite structure with a curved corrugated steel web, traditional wooden formworks are difficult to be helpful, and the complex and variable curves cannot fit with the flat formworks; moreover, due to the large mass of the top plate concrete and the large prestress of the steel bars, the bottom formwork and the side formwork are extremely prone to bending deformation during the pouring process of the top plate. In summary, joint grout leakage is likely to occur, polluting the curved surface of the corrugated steel web, and increasing the workload of later cleaning and repair.

[0003] For the existing box girder composite structure with a curved corrugated steel web, there are also studies on improving the grout leakage at the joints of the corrugated plates. For example, the Chinese patent application case with the application number 2024112543695 discloses an anti-grout leakage device and its usage method for the bottom steel formwork of a composite beam block, specifically including a bottom steel formwork and a corrugated steel web. One end of the bottom steel formwork is provided with an upper opening, and the other end is provided with protrusions symmetrically along the length central axis of the bottom steel formwork. A through groove is arranged in the protrusion, and the corrugated steel web is arranged in the through groove. Symmetric grooves are arranged on both sides of the through groove, and an anti-grout leakage device is installed in the grooves; the anti-grout leakage device includes a clamping component, and the clamping component includes an electromagnet clamp. Symmetric pressing plates are connected to the end of the electromagnet clamp close to the corrugated steel web, and an anti-seepage pressure strip is pressed at one end of the pressing plate close to the corrugated steel web. However, this type of anti-grout leakage device needs to add an additional anti-grout leakage device between the bottom steel formwork and the corrugated steel web, with a relatively complex structure and a high cost.

[0004] In the prior art, there are also studies on the structural improvement of steel formwork in direct contact with corrugated steel webs. For another example, in the Chinese patent application case with the application number 2010203002523, it discloses a corrugated combined steel formwork for concrete pouring on the deck of a box girder with corrugated steel webs. Specifically, it discloses that the contact ends of the outer horizontal corrugated formwork and the inner horizontal corrugated formwork with the corrugated steel web are designed to have the same shape as the corrugated steel web, so as to achieve close fitting after the outer horizontal corrugated formwork and the inner horizontal corrugated formwork are in contact with the corrugated steel web. Among them, the outer horizontal corrugated formwork moves horizontally, and the outer horizontal corrugated formwork is closely attached to the outer wing formwork by adjusting the height of the wooden wedge; the rotating formwork is bolted to the upper part of the inner large formwork skeleton and pinned at the lower part; the inner horizontal corrugated formwork is bolted to the rotating formwork, that is, the inner horizontal corrugated formwork is pinned to the lower part of the inner large formwork skeleton relative to the inner large formwork skeleton, and the inner horizontal corrugated formwork is closely attached to the corrugated steel web. However, in the existing corrugated combined steel formwork of this type, there are many moving parts, its strength needs to be further strengthened, and its structure is relatively complex. Summary of the Invention

[0005] 1. Technical problems to be solved

[0006] Aiming at the technical problems that the structure of the slurry stopping and leakage plugging formwork for curved corrugated steel webs in the prior art is relatively complex and the strength needs to be further improved, the present invention provides a slurry stopping and leakage plugging formwork for curved corrugated steel webs and its using method. Through the optimized design of the specific structure of the outer formwork and the connection method between the outer formwork and the corrugated steel web, the effect of slurry stopping and leakage plugging can be achieved without additionally installing a slurry leakage prevention device; and the outer formwork has high strength, which can improve its deformation degree during the casting process of the wing slab concrete.

[0007] 2. Technical means adopted

[0008] To achieve the above object, the technical solution provided by the present invention is as follows:

[0009] The first aspect of the present invention provides a curved surface corrugated steel web grout stopping and leakage plugging formwork, which is a combined steel member and includes a top plate bottom formwork and two outer formworks. The top plate bottom formwork is used to be arranged on the inner sides of two corrugated steel webs, and the two outer formworks are used to be symmetrically arranged on the outer sides of the two corrugated steel webs. The top plate bottom formwork and the two outer formworks are jointly detachably spliced to form a mold cavity for pouring top plate concrete, and the fitting surfaces of the top plate bottom formwork and the outer formworks with the corrugated steel webs match the shapes of the corrugated steel webs; the outer formwork includes a side formwork bottom plate, a transverse support plate, a longitudinal support plate and a fitting connecting plate. The transverse support plate includes a crest support plate and a trough support plate arranged in parallel at intervals. The crest support plate and the trough support plate are arranged facing the fitting surface in the side formwork bottom plate. The transverse support plate and the longitudinal support plate are orthogonally arranged on the bottom surface of the side formwork bottom plate; the fitting connecting plate is used to detachably connect the side formwork bottom plate and the corrugated steel web, and the fitting connecting plate is provided with connecting holes corresponding to the bolt holes in the corrugated steel web.

[0010] Further, the two crest support plates are symmetrically arranged along the central axis of a single crest of the fitting surface in the side formwork bottom plate, and the crest support plates are arranged corresponding to the center of a single trough of the fitting surface in the side formwork bottom plate.

[0011] Further, the outer formwork further includes two end ribs arranged parallel to the transverse support plate, and the two end ribs are respectively located at both ends of the bottom surface of the side formwork bottom plate.

[0012] Further, the fitting connecting plate is an L-shaped plate, one end of its top surface is attached to and fixedly connected to the bottom surface of the side formwork bottom plate, and the other end of its side wall is attached to the outer side of the corrugated steel web.

[0013] Further, the outer formwork further includes a side formwork inclined plate, one end of the side formwork inclined plate is arranged at the end of the side formwork bottom plate far from the corrugated steel web and is obliquely upwardly arranged towards the other end.

[0014] Further, the bottom surface of the side formwork inclined plate is provided with inclined plate support plates, and a plurality of inclined plate support plates are arranged in parallel at intervals and are arranged facing the side formwork inclined plate, and both ends of them respectively extend to the side lines of the bottom surface of the side formwork inclined plate.

[0015] Further, the outer formwork further includes two head formworks and two flange end formworks. The two head formworks are arranged at the end of the side formwork inclined plate far from the side formwork bottom plate; the two flange end formworks are respectively symmetrically arranged at the other two opposite ends of the side formwork bottom plate; the side formwork bottom plate, the side formwork inclined plate, the head formworks and the two flange end formworks are fixedly connected, and form a mold cavity for pouring flange concrete in combination with a single corrugated steel web.

[0016] Furthermore, the top plate bottom formwork includes a top and bottom plate and two box girder end formworks, and the two box girder end formworks are symmetrically arranged at the other two opposite ends of the top and bottom plates. The top and bottom plates, the two box girder end formworks and the two corrugated steel webs are fitted together to form a mold cavity for pouring top plate concrete; the two ends of the box girder end formwork are respectively and detachably connected to the corresponding flange end formworks in the two outer molds.

[0017] Furthermore, the head template is provided with a plurality of tie holes extending therethrough and spaced apart in the longitudinal direction.

[0018] A second aspect of the present invention provides a method for using a curved corrugated steel web grouting and leak plugging template, comprising the following steps:

[0019] S1, after hoisting and supporting the corrugated steel web, insert the shear steel bar into the bottom of the corrugated steel web, and tie the bottom plate steel mesh and prestressed pipe;

[0020] S2, hoist the outer mold and make its contact side fit closely with the outer side of the corrugated steel web, and use the fitting connection plate to fix the outer mold and the upper part of the corrugated steel web with bolts;

[0021] S3, then placing the top plate bottom formwork on the inner side of the two corrugated steel webs and supporting the bottom end thereof, so that the top plate bottom formwork is closely fitted to the inner side of the corrugated steel webs;

[0022] S4, then the top plate bottom formwork and the two outer side forms are detachably spliced ​​and fixed together to form a mold cavity for pouring the wing plate and top plate concrete;

[0023] S5, inserting shear steel bars into the anchor ribs located on the top of the corrugated steel web, and then tying the top slab concrete steel mesh and prestressed pipes;

[0024] S6, pour the top and bottom slab concrete, vibrate and compact them, and then carry out maintenance.

[0025] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0026] (1) The present invention optimizes the design of the specific structure of the outer mold and the connection method between the outer mold and the corrugated steel web. Specifically, the fitting surface of the side mold bottom plate and the corrugated steel web matches its shape, and the fitting surface of the side mold bottom plate is formed according to the corrugated cutting of the corrugated steel web. Compared with the use of plywood for fitting support, the fitting degree is better and the strength is higher. In addition, a crest support plate and a trough support plate are respectively arranged on the bottom surface of the side mold bottom plate, which are directly opposite to the crest and trough of the fitting surface, and a longitudinal support plate is arranged orthogonally to the transverse support plate, so as to further improve the fitting strength between the outer mold as a whole and the corrugated steel web, and can better maintain the close fitting of the contact surfaces of the two during the pouring process, thereby playing a better role in stopping slurry leakage.

[0027] (2) The present invention further optimizes the temporary fixed connection method between the side formwork bottom plate and the corrugated steel web. Specifically, the fitting connecting plate is an L-shaped plate, one end of which is fixedly connected to the top surface of the side formwork bottom plate and is angled to support the splicing part between the side formwork bottom plate and the corrugated steel web; and the other end side wall is attached to the outer side of the corrugated steel web, and a connection hole corresponding to the bolt hole in the corrugated steel web is provided at this end. The detachable connection between the fitting connecting plate and the corrugated steel web is realized through fixing bolts, that is, the detachable connection between the outer formwork and the corrugated steel web is realized, further improving the lateral support stability of the corrugated steel web and the stability of their close fitting. Description of the Drawings

[0028] Figure 1 It is a three-dimensional structural schematic diagram of the slurry stopping and leak plugging formwork for the curved corrugated steel web in the embodiment of the present invention.

[0029] Figure 2 It is a structural schematic diagram of the bottom end surface of the outer formwork in the embodiment of the present invention.

[0030] Figure 3 In the embodiment of the present invention Figure 2 The enlarged view at B.

[0031] Figure 4 In the present invention Figure 2 The sectional structural schematic diagram at A-A.

[0032] Figure 5 It is the left view structural schematic diagram of the outer formwork in the perspective of the curved corrugated steel web in the embodiment of the present invention. Figure 1

[0033] Figure 6 It is a structural schematic diagram of the use state of the top plate bottom formwork in the embodiment of the present invention.

[0034] Label Description:

[0035] 1. Outer formwork; 101. Side formwork bottom plate; 102. Side formwork inclined plate; 103. Head template; 104. Fitting connecting plate; 105. Flange end template; 106. Tie hole; 107. Crest support plate; 108. Trough support plate; 109. Longitudinal support plate; 1010. End rib; 1011. Inclined plate support plate;

[0036] 2. Top plate bottom formwork; 201. Top and bottom plate; 202. Box girder end template;

[0037] 3. Corrugated steel web;

[0038] 4. Anchor rib plate;

[0039] 5. Support frame. Detailed Embodiment​

[0040] To further understand the content of the present invention, the present invention will be described in detail in combination with the accompanying drawings and embodiments.

[0041] The structures, ratios, sizes, etc. shown in the accompanying drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they do not have technical substantial significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope that can be implemented. The change or adjustment of their relative relationship, without substantial change in technical content, should also be regarded as the scope in which the present invention can be implemented.

[0042] Regarding the description of directions, for the convenience of describing the grout stopping and leakage plugging formwork for curved corrugated steel webs and its usage method, referring to Figure 1 the perspective shown, "transverse" and "longitudinal" are orthogonal to form a horizontal plane. The thickness direction of the corrugated steel web is defined as "transverse", and the horizontal direction perpendicular to the above "transverse" is called "longitudinal", that is, the horizontal direction perpendicular to the thickness direction of the corrugated steel web 3, which is also the direction in which the corrugations of the corrugated steel web 3 extend.

[0043] This embodiment provides a grout stopping and leakage plugging formwork for curved corrugated steel webs. Referring to Figure 1-2 the figure shown, the formwork is a composite steel member, including a top plate bottom form 2 and two outer forms 1. The top plate bottom form 2 is used to be arranged on the inner sides of two corrugated steel webs 3, and the two outer forms 1 are used to be symmetrically arranged on the outer sides of the two corrugated steel webs 3. The top plate bottom form 2 and the two outer forms 1 are jointly detachably spliced to form a cavity for pouring the concrete of the top plate and the wing plate, and the fitting surfaces of the top plate bottom form 2 and the outer forms 1 with the corrugated steel web 3 match the shape of the corrugated steel web 3; wherein the outer form 1 includes a side form bottom plate 101, a transverse support plate, a longitudinal support plate 109 and a fitting connecting plate 104. The transverse support plate includes a peak support plate 107 and a valley support plate 108 arranged in parallel and spaced on the bottom surface of the side form bottom plate 101. The peak support plate 107 and the valley support plate 108 are arranged facing the fitting surface in the side form bottom plate 101. The transverse support plate and the longitudinal support plate 109 are orthogonally arranged on the bottom surface of the side form bottom plate 101; the fitting connecting plate 104 is used to detachably connect the side form bottom plate 101 with the corrugated steel web 3, and the fitting connecting plate 104 is provided with connection holes corresponding to the bolt holes in the corrugated steel web 3.

[0044] In this embodiment, the curved surface corrugated steel web grout stopping and leakage plugging formwork is a combined steel member. Among them, the fitting surface of the side formwork bottom plate 101 matches the shape of the corrugated steel web 3. Specifically, the fitting surface of the side formwork bottom plate 101 is formed by cutting according to the corrugations of the corrugated steel web 3. Compared with using plywood for fitting and support, the fitting degree is better and the strength is higher. In addition, a peak support plate 107 and a valley support plate 108 facing the fitting surface are arranged on the bottom surface of the side formwork bottom plate 101, and a longitudinal support plate 109 arranged orthogonally to the transverse support plate is provided, further improving the fitting strength of the overall side formwork bottom plate 101 and the corrugated steel web 3, and being able to better maintain the close fitting of the contact surface between the two during the pouring process, so as to play a role in grout stopping and leakage plugging.

[0045] Specifically, both ends of the peak support plate 107 and the valley support plate 108 extend to both side lines of the bottom surface of the side formwork bottom plate 101. Preferably, the peak support plate 107 and the valley support plate 108 are welded to the bottom surface of the side formwork bottom plate 101. More specifically, at the intersection of the transverse support plate and the longitudinal support plate 109, the longitudinal support plate 109 is interrupted and welded to form an intersecting and penetrating weld between the transverse support plate and the longitudinal support plate 109.

[0046] Among them, the fitting connecting plate 104 is used to detachably connect the side formwork bottom plate 101 and the corrugated steel web 3, and the fitting connecting plate 104 is provided with connection holes corresponding to the bolt holes in the corrugated steel web 3. The detachable connection between the fitting connecting plate 104 and the corrugated steel web 3 is realized through fixing bolts, that is, the detachable connection between the side formwork bottom plate 101 and the corrugated steel web 3 is realized, further improving the stability of the lateral support for the corrugated steel web 3 and the stability of the close fitting between the two. This temporary fixing method of the outer formwork 1 makes full use of the bolt holes in the corrugated steel web 3. Since there are fixed connections or bracing at the top, bottom and inside of the corrugated steel web 3, the whole structure is in a safe and stable state, and this outer formwork does not require other structures for support, omitting the traditional outer formwork support bracket.

[0047] Generally speaking, a plurality of bolt holes arranged at intervals in the vertical direction are provided at both ends of the corrugated steel web 3 along its extending direction. In a steel-concrete composite beam bridge, the bolt holes in adjacent corrugated steel webs 3 correspond and overlap, and the fixed connection between adjacent corrugated steel webs 3 is realized through fixing bolts. This formwork cleverly utilizes the bolt holes in adjacent corrugated steel webs 3 to realize the temporary fixation of the outer formwork 1 and the corrugated steel web 3.

[0048] As a preferred implementation manner of the side formwork bottom plate 101, two peak support plates 107 are symmetrically arranged along the central axis of a single peak of the fitting surface in the side formwork bottom plate 101, and the valley support plate 108 is correspondingly arranged along the center of a single valley of the fitting surface in the side formwork bottom plate 101.

[0049] Reference Figure 2As shown, in order to further improve the stability of the side formwork bottom plate 101, the outer formwork 1 further includes end ribs 1010 arranged parallel to the transverse support plate, and the two end ribs 1010 are respectively located at both ends of the bottom surface of the side formwork bottom plate 101. Further, both ends of the end rib 1010 respectively extend to both side lines of the bottom surface of the side formwork bottom plate 101. By adding the end ribs 1010, the bending stiffness of the side formwork bottom plate 101 can be increased, preventing it from deforming due to concrete pouring. Among them, the end rib 1010 intersects and is interrupted and welded with the longitudinal support plate 109, and one end of the longitudinal support plate 109 intersects and connects with the end rib 1010.

[0050] In some embodiments, the fitting connecting plate 104 is an L-shaped plate, one end of its top surface is attached and fixedly connected to the bottom surface of the side formwork bottom plate 101, and the side wall of the other end is attached to the outer side of the corrugated steel web 3. Specifically, this end is provided with connection holes corresponding to the bolt holes in the corrugated steel web 3. From the fact that the top surface and the side wall of the fitting connecting plate 104 are respectively attached to the side formwork bottom plate 101 and the corrugated steel web 3, it can be seen that the fold angle of the fitting connecting plate 104 is the same as the angle of the joint supporting the side formwork bottom plate 101 and the corrugated steel web 3. Thus, the fold angle of the fitting connecting plate 104 can be used to support the joint of the side formwork bottom plate 101 and the corrugated steel web 3.

[0051] As a further preference for any of the above embodiments, refer to Figures 3-5 As shown, the outer formwork further includes a side formwork inclined plate 102. One end of the side formwork inclined plate 102 is arranged at one end of the side formwork bottom plate 101 far from the corrugated steel web 3 and is inclined upward obliquely towards the other end. The side formwork inclined plate 102 is inclined upward along the direction away from the corrugated steel web 3, which is an adaptive design to match the shape of the wing plate in the box girder.

[0052] Specifically, the bottom surface of the side formwork inclined plate 102 is provided with inclined plate support plates 1011. A plurality of inclined plate support plates 1011 are arranged in parallel at intervals and are arranged opposite to the side formwork inclined plate 102. Both ends of them respectively extend to the bottom end surface of the head template 103 and one end of the peak support plate 107. Refer to Figure 4 As shown, the inclined plate support plates 1011 and the peak support plates 107 are arranged in one-to-one correspondence to further increase the stability of the attachment between the side formwork bottom plate 101 and the corrugated steel web 3. As an extended solution, refer to Figure 2 As shown, the number of the inclined plate support plates 1011 is greater than that of the peak support plates 107, and the remaining plurality of inclined plate support plates 1011 are arranged in parallel at intervals to further increase the stability of the side formwork inclined plate 102.

[0053] More specifically, the outer formwork further includes two end head formwork 103 and two flange end formwork 105. The two end head formwork 103 are arranged at one end of the side formwork inclined plate 102 away from the side formwork bottom plate 101; the two flange end formwork 105 are symmetrically arranged at the other two opposite ends of the side formwork bottom plate 101 respectively. Further preferably, the vertical side surfaces of the two flange end formwork 105 and one end of the side formwork bottom plate 101 close to the curved corrugated steel web 3 are flush; the side formwork bottom plate 101, the side formwork inclined plate 102, the end head formwork 103 and the two flange end formwork 105 are fixedly connected, and are attached to a single corrugated steel web 3 to form a cavity for pouring the flange concrete.

[0054] As an extended solution, the flange end formwork 105 is a folded steel plate, that is, it is an integral steel plate, which can not only adapt to the fold angle at the connection between the side formwork inclined plate 102 and the side formwork bottom plate 101, but also is beneficial to its stability.

[0055] Even more preferably, the side formwork bottom plate 101, the side formwork inclined plate 102, the end head formwork 103 and the two flange end formwork 105 are fixedly connected by welding. Among them, setting the whole outer formwork as a fixed connection helps to reduce the on-site temporary connection during the on-site construction process and facilitates the rapid erection of the formwork during the construction process.

[0056] As an extended solution, the top plate bottom formwork 2 includes a top and bottom plate 201 and two box girder end formwork 202. Refer to Figure 6 As shown, a full hall formwork support frame 5 is arranged under the top and bottom plate 201. To ensure uniform stress on the top and bottom plate 201, square timbers or square steel pipes are placed in the U-shaped top supports in the full hall formwork support frame 5 to serve as purlins. The two box girder end formwork 202 are symmetrically arranged at the other two opposite ends of the top and bottom plate 201 respectively. The top and bottom plate 201, the two box girder end formwork 202 and the two corrugated steel webs 3 are attached to form a cavity for pouring the top plate concrete.

[0057] During the formwork erection process before pouring, the box girder end formwork 202, the flange end formwork 105 and the top and bottom plate 201 are jointly detachably spliced to form a cavity for pouring the top plate and flange concrete. More specifically, the box girder end formwork 202 and the top and bottom plate 201 are temporarily fixedly connected, and the two ends of the box girder end formwork 202 are respectively detachably connected to the corresponding flange end formwork 105 in the two outer formworks 1, so as to realize the detachable connection between the outer formwork 1 and the top plate bottom formwork 2, which is convenient for the rapid erection of the formwork during the construction process and for the easy and rapid removal of the formwork after pouring the concrete. Preferably, sleeves are welded on the outer side walls of the box girder end formwork 105 and the flange end formwork 105 away from the cavity, and screws, connecting steel bars or pins can be inserted into the sleeves to realize their fixed connection, and the joints between the two can be sealed with foamed polyurethane.

[0058] As a further preferred embodiment of the box beam end capping template 105, the outer side wall opposite to the mold cavity for pouring top plate concrete is provided with stiffening ribs arranged orthogonally in the longitudinal and transverse directions. For other loose joints caused by construction reasons in the present invention, polyurethane foam sealant can also be used to seal.

[0059] More specifically, see Figure 1 , Figure 5 As shown, the end mold 103 is provided with a plurality of tie holes 106 which are spaced apart longitudinally therethrough. Before pouring the concrete of the top slab of the box beam, a tensioning screw or a tensioning brace can be used to strengthen the stability to prevent the end mold 103 from lateral bending and deformation. Further preferably, the tie holes 106 are circular holes or elliptical holes.

[0060] In order to improve the stability of the connection between the corrugated steel web 3 and the cast top plate, the top end of a single corrugated steel web 3 is fixedly connected to two anchor ribs 4 spaced apart in the transverse direction, and the two anchor ribs 4 are symmetrically arranged about the center of the corrugated steel web 3. Preferably, a connecting bottom plate is provided at the top end of the single corrugated steel web 3, and the bottom end of the anchor rib 4 is welded to the top surface of the connecting bottom plate.

[0061] The method for using the curved corrugated steel web grouting and leak plugging template involved in any of the above embodiments comprises the following steps:

[0062] S1, after hoisting and supporting the corrugated steel web 3, insert the shear steel bar into the bottom of the corrugated steel web 3, and tie the bottom plate steel mesh and prestressed pipe;

[0063] S2, hoist the outer mold 1 and make its contact side fit closely with the outer side of the corrugated steel web 3, and use the fitting connection plate 104 to fix the outer mold 1 and the upper part of the corrugated steel web 3 by bolts;

[0064] S3, then place the top plate bottom mold 2 on the inner side of the two corrugated steel webs 3 and support the bottom end thereof, so that the contact side of the top plate bottom mold 2 is closely fitted with the inner side of the corrugated steel webs 3;

[0065] S4, then the top plate bottom mold 2 and the two outer molds 1 are detachably spliced ​​and fixed together to form a mold cavity for pouring the wing plate and top plate concrete;

[0066] S5, inserting shear steel bars into the anchor rib 4 located on the top of the corrugated steel web 3, and then tying the top plate concrete steel mesh and prestressed pipe;

[0067] S102, pour the top and bottom slab concrete, vibrate and compact them, and then carry out maintenance.

[0068] In step S5, shear steel bars are inserted into the steel bar holes of the anchor ribs 4, thereby achieving a fixed connection between the upper portion of the corrugated steel web 3 and the top plate formed by cast-in-place concrete.

[0069] And step S7 of demolishing the formwork after step S102, specifically, first disassembling the connection between the beam end formwork 105 and the flange end formwork 105, then disassembling the connection between the outer formwork 1 and the corrugated steel web 3, and finally, after the concrete reaches the design strength, demolishing the bottom formwork 2 of the top plate and the support frame 5 for supporting it.

[0070] When a plurality of tie holes 106 are provided in the head formwork 103 at intervals along the longitudinal direction, step S5 further includes, after binding the steel bar mesh and prestressed ducts of the top plate concrete, passing a tie rod or a fixed brace through the tie holes 106 on both sides of the head formwork 103 for fixation. After the pouring is completed, in step S7, first disassembling the connection between the beam end formwork 105 and the flange end formwork 105, then removing the tie rod or the fixed brace, and then disassembling the connection between the outer formwork 1 and the corrugated steel web 3.

[0071] In the cantilever hanging basket construction process, by repeating the above operation steps, the cantilever construction of a long-span prestressed steel-concrete composite bridge can be completed.

[0072] The above has schematically described the present invention and its implementation manners. This description is not restrictive, and what is shown in the drawings is only one of the implementation manners of the present invention. The actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural modes and embodiments to this technical solution without creative efforts without departing from the gist of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A curved corrugated steel web grouting and leak-proofing template, characterized in that: The template is a combined steel component, comprising a top plate bottom template (2) and two outer templates (1), the top plate bottom template (2) is used to be arranged on the inner side of two corrugated steel webs (3), and the two outer templates (1) are used to be symmetrically arranged on the outer sides of the two corrugated steel webs (3), the top plate bottom template (2) and the two outer templates (1) are detachably spliced ​​together to form a mold cavity for pouring top plate and wing plate concrete, and the fitting surfaces of the top plate bottom template (2) and the outer template (1) and the corrugated steel webs (3) are both matched with the shape of the corrugated steel webs (3); The outer mold (1) comprises a side mold bottom plate (101), a transverse support plate, a longitudinal support plate (109) and a fitting connection plate (104), wherein the transverse support plate comprises a wave crest support plate (107) and a wave trough support plate (108) which are parallel and spaced apart, wherein the wave crest support plate (107) and the wave trough support plate (108) are arranged opposite to the fitting surface in the side mold bottom plate (101), and the transverse support plate and the longitudinal support plate (109) are arranged orthogonally on the bottom surface of the side mold bottom plate (101); The fitting connection plate (104) is used for detachably connecting the side mold bottom plate (101) and the corrugated steel web (3), wherein the fitting connection plate (104) is provided with connection holes corresponding to the bolt holes in the corrugated steel web (3).

2. The curved corrugated steel web grouting and leak-proofing template according to claim 1 is characterized in that: The two wave crest support plates (107) are symmetrically arranged along the central axis of a single wave crest of the fitting surface in the side mold bottom plate (101), and the wave trough support plate (108) is correspondingly arranged along the center of a single wave trough of the fitting surface in the side mold bottom plate (101).

3. The curved corrugated steel web grouting and leak-proofing template according to claim 2 is characterized in that: The outer side mold (1) further comprises two end ribs (1010) arranged parallel to the transverse support plate, and the two end ribs (1010) are respectively located at two ends of the bottom surface of the side mold bottom plate (101).

4. The curved corrugated steel web grouting and leak-proofing template according to any one of claims 1 to 3, characterized in that: The fitting connection plate (104) is an L-shaped plate, the top surface of one end of which fits and is fixedly connected to the bottom surface of the side mold bottom plate (101), and the side wall of the other end fits to the outer side of the corrugated steel web (3).

5. The curved corrugated steel web grouting and leak-proofing template according to any one of claims 1 to 3, characterized in that: The outer mold further comprises a side mold inclined plate (102), one end of which is arranged at one end of the side mold bottom plate (101) away from the corrugated steel web (3) and is arranged obliquely upward toward the other end.

6. The curved corrugated steel web grouting and leak-proofing template according to claim 5 is characterized in that: The bottom surface of the side formwork inclined plate (102) is provided with an inclined plate support plate (1011), and a plurality of inclined plate support plates (1011) are arranged in parallel and spaced apart and directly opposite to the side formwork inclined plate (102), and both ends thereof extend to the edge lines of the bottom surface (102) of the side formwork inclined plate.

7. The curved corrugated steel web grouting and leak-proofing template according to claim 5 is characterized in that: The outer mold further comprises two end capping molds (103) and two flange end capping molds (1055), wherein the two end capping molds (103) are arranged at one end of the side mold inclined plate (102) away from the side mold bottom plate (101); the two flange end capping molds (105) are symmetrically arranged at the other two opposite ends of the side mold bottom plate (101); the side mold bottom plate (101), the side mold inclined plate (102), the end capping mold (103) and the two flange end capping molds (105) are fixedly connected and fit with the single corrugated steel web (3) to form a mold cavity for pouring flange plate concrete.

8. The curved corrugated steel web grouting and leak-proofing template according to claim 7 is characterized in that: The top plate bottom formwork (2) comprises a top plate (201) and two box beam end formworks (202), wherein the two box beam end formworks (202) are symmetrically arranged at the other two opposite ends of the top plate (201), and the top plate (201), the two box beam end formworks (202) and the two corrugated steel webs (3) are fitted together to form a mold cavity for pouring top plate concrete; the two ends of the box beam end formworks (202) are respectively detachably connected to the corresponding flange end formworks (105) of the two outer molds (1).

9. The curved corrugated steel web grouting and leak-proofing template according to claim 7 is characterized in that: The end cap template (103) is provided with a plurality of tie holes (106) extending therethrough and spaced apart in the longitudinal direction.

10. A method for using the curved corrugated steel web grouting and leak plugging template according to any one of claims 1 to 9, characterized in that: The steps include: S1, after hoisting and supporting the corrugated steel web (3) to position, shear steel bars are inserted into the bottom of the corrugated steel web (3), and the bottom plate steel mesh and prestressed pipe are tied; S2, hoisting the outer mold (1) and making its contact side closely fit with the outer side of the corrugated steel web (3), and using a fitting connection plate (104) to fix the outer mold (1) and the upper part of the corrugated steel web (3) by bolts; S3, then placing the top plate bottom mold (2) on the inner side of the two corrugated steel webs (3) and supporting the bottom end thereof, so that the contact side of the top plate bottom mold (2) is closely fitted with the inner side of the corrugated steel webs (3); S4, then the top plate bottom mold (2) and the two outer molds (1) are detachably spliced ​​and fixed together to form a mold cavity for pouring the wing plate and top plate concrete; S5, inserting shear steel bars into the anchor ribs (4) located on the top of the corrugated steel web (3), and then tying the top slab concrete steel mesh and prestressed pipes; S6, pour the top and bottom slab concrete, vibrate and compact them, and then carry out maintenance.

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