Formwork device of bridge span closure section, bridge span closure section and bridge

Abstract

The utility model relates to the technical field of closure construction of bridge spans, in particular to a formwork device of a bridge span closure section, the bridge span closure section and a bridge. The formwork device can comprise a first formwork, a plurality of connecting pieces and a plurality of profile steel components, the profile steel components are erected between the two corresponding existing bridge sections, the connecting pieces are connected between the first formwork and the corresponding profile steel components, and concrete can be poured into the first formwork to form a closure section. The formwork can be directly erected in the existing bridge section through the multiple supporting pieces, the bearing performance of the formwork is improved, additional supporting equipment does not need to be added, the construction procedure and the operation process are simplified, and the construction efficiency and the operation safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge span closure construction, in particular to a template device for a bridge span closure section, a bridge span closure section and a bridge. Background Art

[0002] In the closure construction of bridge spans, for example, the closure construction of rotating bridge spans, when the rotating bridge section is rotated into place, the gap between the two spans needs to be filled with the corresponding construction technology and methods to form a new bridge body to complete the final closure of the span. However, in the current closure construction method of bridge spans, the closure section in the span is often constructed by hoisting a single formwork. Since the rigidity and strength of the closure formwork itself and the connection with the existing bridge section are not enough to bear the gravity load of the concrete filled in the formwork, it is very easy to cause accidents such as deformation or even collapse of the formwork. Even if the two ends of the steel formwork of the closure section are connected to the The embedded steel formwork is welded as a whole and cannot form a permanent steel formwork with sufficient strength, rigidity and stability. Usually, to solve this technical problem, equipment such as brackets can be added under the cast formwork during construction to provide additional support for the formwork. However, when the construction location cannot provide further support by setting up brackets and other facilities under the bridge, such as above operating areas such as railways, the construction conditions are also greatly restricted, making it impossible to ensure the safety and stability of the mid-span joint section above the existing structure. Therefore, it is urgent to make corresponding improvements to the formwork itself and the support method to solve this technical problem. Utility Model Content

[0003] The purpose of the utility model is to provide a formwork device for a bridge span joint section, a bridge span joint section and a bridge in order to solve the technical problem of insufficient formwork strength, rigidity and stability caused by the inability to increase supporting equipment during joint construction operations above an existing structure in the prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model provides, on the one hand, a formwork device for a bridge span joint section, which may include a first formwork, a plurality of connecting parts and a plurality of steel members, wherein the steel members are erected between two corresponding existing bridge sections, the connecting parts are connected between the first formwork and the corresponding steel members, and concrete can be poured in the first formwork to form a joint section.

[0005] The prior art usually directly connects the two ends of the template to the steel bars in the existing bridge section by welding, which will concentrate the load on the template at the welding point between the template and the steel bars, and the position of the steel bars in the existing bridge section is fixed and cannot be adjusted. Therefore, this method cannot further improve the bearing capacity by adjusting the position, number and size of the bearing components. Therefore, for the load part that exceeds its bearing capacity, it is necessary to set up additional supporting equipment under the template to meet the construction work needs; while the utility model can set up multiple steel members that meet the strength and stiffness requirements side by side between the existing bridge sections along the bridge width direction, and then install multiple corresponding connecting parts under each steel member along the bridge length direction, so that the steel member and the first template can be firmly connected together by arranging them in two directions at the same time, and the gravity load borne by the template can be dispersed to the maximum extent to the evenly arranged connecting parts and steel members, which can effectively improve the bearing performance of the template. On this basis, the size and arrangement number of the steel members and the connecting parts can be freely adjusted to further improve the bearing capacity, and the bearing requirements in construction can be met without adding other supporting devices.

[0006] The bearing capacity of the formwork device can be significantly improved and the construction work requirements can be met by installing steel members between existing bridge sections and adjusting the parameters of the steel members and connectors. Specifically, in the design stage, the overall quality of the bridge span after casting can be estimated first, and then the materials of the steel members and connectors can be selected according to the estimated value to meet the strength and stiffness requirements. Then, the number of steel members installed between the existing bridge sections, the spacing between adjacent steel members, the size of the steel members, and the size and layout density of the connectors can be adjusted simultaneously, so that the overall bearing capacity of the formwork device meets the operation requirements.

[0007] As a preferred solution of the present utility model, the formwork device also includes a second formwork, the second formwork is fixedly connected to the first formwork via the connecting piece, and the second formwork and the first formwork can be combined to form a pouring space for pouring concrete.

[0008] For the box-beam bridge structure, it is necessary to add a second template (i.e., inner template) during pouring to cast and form the hollow cavity of the box-beam. The second template can be designed as a closed structure on all sides, and then the bolts on the connecting parts are bolted to the bottom plate of the second template, so that the second template is fixedly connected to the first template, and a pouring space can be formed between the second template and the first template, so that one-time overall pouring can be achieved.

[0009] As a preferred embodiment of the present invention, the formwork device also includes a second formwork, which is placed on the poured concrete. The second formwork and the first formwork can be combined to form a pouring space for pouring concrete, and concrete can continue to be poured on the second formwork to form a joint section.

[0010] Another casting method for the box beam structure is to cast the bottom plate structure before installing the second formwork. After the first cast concrete solidifies, the second formwork can be placed directly on the bottom plate, so that the second formwork does not need to be provided with a bottom plate, that is, it is not necessary to form an inner formwork with a closed structure on all sides, which is conducive to reducing the weight of the formwork when casting the joint section. In addition, during the continued casting process after the second formwork is installed, the lateral force of the cast concrete on the second formwork is not large, so the lateral position of the second formwork does not need to be limited by the box beam of the existing bridge section, and the two ends of the second formwork do not need to extend into the existing bridge section.

[0011] As a preferred solution of the present utility model, the connecting piece is detachably connected to the corresponding steel member, and the connecting piece is fixedly connected to the first template.

[0012] Before pouring, the embedded steel bars in the joint section can be welded to the steel bars extending from the existing bridge section. After the pouring is completed, the entire load of the joint section is borne by the steel bars, so the steel structure can be removed. Therefore, the connection between the connector and the steel structure needs to be detachable, such as by bolt connection; the connector and the first formwork are integrally cast and permanently retained in the joint section, so the connector and the first formwork can be fixedly connected, such as by welding.

[0013] As a preferred solution of the utility model, the connecting member is an "L"-shaped structure, the longitudinal side of the "L"-shaped structure is connected to the steel member, and the transverse side of the "L"-shaped structure is fixedly connected to the first template.

[0014] The connecting piece is designed as an "L"-shaped structure and then fixedly connected to the first template by methods such as welding. This method can effectively increase the connection area between the connecting piece and the first template, thereby increasing the size of the weld after welding. When subjected to force, the gravity load can be evenly dispersed in the connection surface between the connecting piece and the first template, reducing stress concentration and further improving the bearing capacity of the device.

[0015] As a preferred solution of the utility model, limiting mechanisms are installed at both ends of the steel structure, and the limiting mechanisms include at least two limiting plates and anchors. The anchors are installed at the lower ends of the limiting plates and are used to anchor the limiting mechanism in the existing bridge section; the steel structure is inserted into the limiting mechanism and is located between the two limiting plates, and the limiting mechanism is used to prevent the template device from lateral displacement.

[0016] For the existing bridge section before the joint is closed, usually because it extends outward from the bridge pier for a long distance, the connection between the existing bridge section and the joint section is susceptible to external forces (such as wind force, etc.) and causes lateral (i.e., bridge width direction) shaking. Since the formwork device of the utility model is not rigidly connected to the existing bridge sections on both sides, the formwork device is prone to lateral displacement under the lateral shaking of the existing bridge sections, and in severe cases, it may even fall from both sides. Therefore, adding a limiting mechanism at both ends of the steel structure can effectively prevent the joint bridge section from lateral displacement. Specifically, The two ends of the steel structure member pass through the limiting mechanism respectively, and the lower end of the limiting mechanism is fixed to the existing bridge section by an anchor, so that the steel structure member can be kept relatively fixed with the existing bridge section in the lateral direction under the action of the limiting mechanism, thereby avoiding lateral displacement of the formwork device or the entire joint section; in addition, the limiting mechanism does not restrict the length direction of the steel structure member on the front and rear sides. Therefore, when the bridge body is deformed and displaced in the length direction due to thermal expansion and contraction, the steel structure member can slide freely back and forth in the limiting mechanism and will not be deformed due to the thermal expansion and contraction of the bridge body.

[0017] Another aspect of the utility model provides a bridge span closure section, which is cast by the formwork device of the bridge span closure section as described above; the bridge span closure section includes the first formwork, the connecting member and concrete.

[0018] During the integral pouring of the bridge span joint section, the gravity load brought by concrete and other materials can be evenly distributed in the formwork device, and can be shared by the steel components and L-shaped connectors arranged along the width and length of the bridge, thereby reducing the load on the existing steel bars in the bridge section and effectively improving the bearing performance. In addition, after pouring, the first formwork and connectors in the formwork device can be permanently retained in the joint section without disassembly. In order to further improve the strength of the joint section, the steel components can also be retained without disassembly, thereby simplifying the pouring operation method and improving the pouring construction efficiency.

[0019] Another aspect of the utility model provides a bridge, comprising the bridge span closure section as described above, wherein the bridge span closure section is cast by the formwork device of the bridge span closure section as described above.

[0020] The existing bridge sections are connected on both sides of the bridge span joint section in the bridge, thus forming an integral bridge body. During pouring, the joint section of the bridge can share the load using the steel components and L-shaped connectors arranged along the width and length of the bridge in the formwork device. After pouring is completed, the load can be shared using the formwork and other components permanently retained in the joint section and the existing and newly added steel bar structures in the bridge body. Its bearing performance is better than that of the existing bridge body.

[0021] Another aspect of the utility model provides a construction method for a bridge span joint section, which can adopt the formwork device for the bridge span joint section as described above; the construction method includes fixing a plurality of connecting parts on a first formwork, erecting the two ends of a plurality of steel members in two existing bridge sections, hoisting the first formwork between the two existing bridge sections, aligning and fixedly connecting the steel members with the plurality of connecting parts, installing a second formwork above the first formwork, and pouring concrete into the formwork device to form the joint section.

[0022] The construction method of the bridge span joint section adopting the utility model can respectively set up steel components side by side along the bridge width direction between the two existing bridge sections, and install connecting parts on the first template along the bridge width and bridge length direction, and then connect each steel component with the corresponding connecting part, so that the gravity load borne by the template during pouring can be evenly distributed to each connecting part and steel component, avoiding stress concentration. Compared with the existing construction method of welding the template to the existing steel bars, which is easy to cause stress concentration and cannot be freely adjusted, the construction method of the utility model can effectively avoid the above problems and improve the bearing performance.

[0023] As a preferred solution of the utility model, the construction method also includes installing limiting mechanisms at both ends of the steel member, anchoring the lower end of the limiting mechanism in the existing bridge section, and passing the two ends of the steel member through the limiting mechanism.

[0024] When installing multiple steel sections, first install the steel sections on both sides along the width of the bridge, and then install the steel sections in the middle.

[0025] The construction method of the bridge span joint section adopting the utility model can add limiting mechanisms at both ends of the steel structure to effectively avoid lateral displacement of the joint bridge section. The limiting plates of the limiting mechanism are arranged on both sides of the steel structure to prevent the steel structure from lateral displacement, and the steel structure can pass through the limiting mechanism and slide freely, which also avoids the bridge body from transferring stress to the steel structure to cause deformation when thermal expansion and contraction occur.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model include the following:

[0027] 1. The formwork device of the bridge span joint section of the utility model adopts multiple supporting members arranged side by side, which can directly erect the formwork in the existing bridge sections in the bridge span joint sections on the front and rear sides, thereby improving the supporting performance of the formwork for the gravity load applied by pouring concrete, and eliminating the need to add additional supporting equipment below in an environment where construction conditions are restricted above the operating area such as railways, thereby simplifying the construction process and operation flow, and further improving construction efficiency and operation safety.

[0028] 2. When the bridge span joint section of the utility model is cast as a whole, the gravity load brought by concrete and other materials can be evenly distributed in the formwork device, and can be shared by the steel components and L-shaped connectors arranged along the width and length of the bridge, thereby reducing the load on the existing steel bars in the bridge section and effectively improving the bearing performance; in addition, after casting, the first formwork and connectors in the formwork device can be permanently retained in the joint section without disassembly. In order to further improve the strength of the joint section, the steel components can also be retained without disassembly, thereby simplifying the casting operation method and improving the casting construction efficiency.

[0029] 3. The bridge of the utility model is also connected to existing bridge sections on both sides of the bridge span joint section, so as to form an integral bridge body. During casting, the joint section of the bridge can share the load by using the steel members and L-shaped connectors arranged along the width and length of the bridge in the formwork device. After casting, the load can be shared by using the formwork and other components permanently retained in the joint section and the existing and newly added steel bar structures in the bridge body. Its bearing performance is better than that of the existing bridge body.

[0030] 4. The construction method of the bridge span joint section of the utility model can respectively set up steel components side by side along the bridge width direction between the two existing bridge sections, and install connecting parts on the first template along the bridge width and bridge length direction, and then connect each steel component with the corresponding connecting part, so that the gravity load borne by the template during pouring can be evenly distributed to each connecting part and steel component, avoiding stress concentration. Compared with the existing construction method of welding the template to the existing steel bars, which is easy to cause stress concentration and cannot be freely adjusted, the construction method of the utility model can effectively avoid the above problems and improve the bearing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a half-section schematic diagram of the formwork device of the bridge span closure section of exemplary embodiment 1 of the utility model.

[0032] Figure 2 yes Figure 1 Left side cross-sectional view.

[0033] Figure 3 yes Figure 1 Partial schematic diagram at point A in the middle.

[0034] Figure 4 yes Figure 1 Partial schematic diagram of point B in the middle.

[0035] Icons: 1. First formwork, 2. Connectors, 21. Fasteners, 22. Pads, 3. Steel members, 4. Second formwork, 5. Limiting mechanism, 51. Limiting plates, 52. Anchors, 6. Existing bridge sections, 7. Concrete. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in combination with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0037] In the description of the specific embodiments of the present invention, unless otherwise specified, the terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / equipment / device of the utility model is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0038] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the utility model.

[0039] In addition, the expressions “first”, “second”, “third”, etc. that appear in the terms are merely descriptions used to distinguish the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0040] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0041] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0042] In the related art, the construction of the mid-span closure section often adopts a single formwork hoisting construction. Since the stiffness and strength of the closure formwork itself and the connection with the existing bridge section are not enough to bear the gravity load of the concrete filled in the formwork, it is very easy to cause accidents such as deformation or even collapse of the formwork. Even if the two ends of the steel formwork of the closure section are welded to the embedded steel formwork as one, a permanent steel formwork with sufficient strength, rigidity and stability cannot be formed. Usually, in order to solve this technical problem, equipment such as brackets can be added under the cast formwork during construction to provide additional support for the formwork. However, when the construction location cannot set up brackets and other facilities under the bridge to provide further support, such as above the railway and other operating areas, the construction conditions are also greatly restricted, and it is impossible to ensure the safety and stability of the mid-span closure section above the existing structure.

[0043] Based on this, the utility model provides a formwork device for a bridge span joint section, which may include a first formwork, a plurality of connecting parts and a plurality of steel members, wherein the steel members are erected between two corresponding existing bridge sections, the connecting parts are connected between the first formwork and the corresponding steel members, and concrete can be poured in the first formwork to form a joint section.

[0044] The formwork device of the bridge span joint section of the utility model adopts multiple supporting members arranged side by side, which can directly erect the formwork in the existing bridge sections in the bridge span joint sections on the front and rear sides, thereby improving the supporting performance of the formwork for the gravity load applied by pouring concrete, and thus eliminating the need to add additional supporting equipment below in an environment with restricted construction conditions above an operating area such as a railway, thereby simplifying the construction process and operation flow, and further improving construction efficiency and operation safety.

[0045] Exemplary Embodiment 1

[0046] This exemplary embodiment provides a formwork device for a bridge span closure section.

[0047] Figure 1 It is a half-section schematic diagram of a template device for a bridge span closure section according to an exemplary embodiment 1 of the utility model; Figure 2 yes Figure 1 Left side cross-sectional view; Figure 3 yes Figure 1 The local schematic diagram of the A in the middle; Figure 4 yes Figure 1 A partial schematic diagram of point B in the middle.

[0048] like Figures 1 to 4 As shown in , the formwork device of the bridge span joint section described in this exemplary embodiment may include a first formwork 1, a plurality of connecting members 2 and a plurality of steel members 3, wherein the plurality of steel members 3 may be fixedly connected to the first formwork 1 through the plurality of connecting members 2, and both ends of each steel member 3 may be erected in the existing bridge sections 6 on the front and rear sides; here, the first formwork 1 may specifically be a steel formwork with sufficient strength and rigidity; the connecting member 2 may be a metal rod with sufficient strength and rigidity, and its upper end may be formed as a screw with external threads; the steel member 3 may be a channel steel with sufficient strength and rigidity, and the length of the channel steel should be much larger than the distance dimension between the existing bridge sections 6 on both sides, so that the channel steel can be stably erected between the existing bridge sections 6 on both sides; but the utility model is not limited thereto, and the materials and shapes of the first formwork 1, the connecting member 2 and the steel member 3 may be arbitrarily adjusted according to actual needs, and the number and arrangement of the connecting member 2 and the steel member 3 may also be arbitrarily adjusted according to actual needs, and are not limited to the above-mentioned selections, and the utility model does not make specific limitations on this.

[0049] Here, the bearing capacity of the formwork device can be significantly improved and the construction work requirements can be met by installing steel members 3 between the existing bridge sections 6 and adjusting the parameters of the steel members 3 and the connectors 2. Specifically, in the design stage, the overall quality of the bridge span after casting can be first estimated, and then the materials of the steel members 3 and the connectors 2 can be selected according to the estimated value to meet the strength and stiffness requirements, and then the number of steel members 3 installed between the existing bridge sections 6, the spacing between adjacent steel members 3, the size of the steel members 3, and the size and layout density of the connectors 2 can be adjusted simultaneously, so that the overall bearing capacity of the formwork device meets the operation requirements.

[0050] In this embodiment, the formwork device of the bridge span joint section may also include a plurality of second formworks 4, which may be installed in parallel above the first formwork 1, and a connected casting space may be formed between the plurality of second formworks 4 and between the second formworks 4 and the first formwork 1, and the casting space may be filled with concrete 7 to form the joint section.

[0051] Specifically, the number of second templates 4 installed on the first template 1 can be 4 (the overall cross-section of the closure section is a symmetrical structure, Figure 1 Only half of it is shown. Figure 1The number of the second templates 4 is only 2 on half of the side), the 4 second templates 4 can be arranged side by side and at intervals, the second templates 4 can be wooden templates that are easy to install and disassemble, a single wooden template can be surrounded to form a cavity, and concrete 7 will not enter the cavity during pouring. After pouring is completed, the wooden template can be removed after the concrete 7 in the pouring space is solidified, and the reserved cavity position can effectively reduce the mass of the bridge body at the joint section, and the concrete 7 can be formed into a suspension beam between adjacent wooden templates, which can be used to support the frame structure of the bridge body at the joint section; however, the utility model is not limited to this, the number, specific material and shape of the installed second templates 4 can be freely adjusted according to actual needs, and are not limited to the above-mentioned options, and the utility model does not make specific limitations on this.

[0052] The structure and installation method of the second template 4 can be specifically determined according to different casting methods. For integral casting, the second template 4 can be designed as a closed structure on all sides, and then the bolts on the connecting member 2 are bolted to the bottom plate of the second template 4, so that the second template 4 is fixedly connected to the first template 1, and a casting space can be formed between the second template 4 and the first template 1, so that one-time integral casting can be achieved. For the staged casting method, the bottom plate structure can be cast before the second template 4 is installed. After the concrete cast first is solidified, the second template 4 can be directly placed on the bottom plate, so that the second template 4 does not need to be provided with a bottom plate, that is, it is not necessary to form an inner mold of a closed structure on all sides, which is conducive to reducing the weight of the template when casting the joint section. In addition, during the continued casting process after the second template 4 is installed, the lateral force of the cast concrete on the second template 4 is not large, so the lateral position of the second template 4 does not need to be limited by the box beam of the existing bridge section, and the two ends of the second template 4 do not need to extend into the existing bridge section.

[0053] In this embodiment, several connecting members 2 can be an "L"-shaped structure, one section of the "L"-shaped structure (the vertical section in the figure) can be fixedly connected to the corresponding steel member 3, and the other section (the horizontal section in the figure) can be fixedly connected to the first template 1. Several connecting members 2 can be used to transfer the gravity load borne by the first template 1 to several steel members 3.

[0054] Specifically, the installation positions and arrangement of the plurality of connectors 2 on the first template 1 need to correspond to the positions of the steel members 3. Usually, the plurality of connectors 2 can be fixedly connected to a corresponding steel member 3, and the plurality of connectors 2 can be spaced apart from each other and evenly distributed on the steel member 3. That is, the number of rows of connectors 2 distributed on the first template 1 can be the same as the number of connectors 2 connected to each steel member 3, and the number of columns of connectors 2 distributed on the first template 1 is the same as the number of installed steel members 3.

[0055] Here, the connector 2 is designed as an "L"-shaped structure and then the connector 2 is fixedly connected to the first template 1 by means such as welding. This method can effectively increase the connection area between the connector 2 and the first template 1, thereby increasing the size of the weld after welding. When subjected to force, the gravity load can be evenly dispersed in the connection surface between the connector 2 and the first template 1, reducing stress concentration and further improving the bearing capacity of the device; however, the present invention is not limited to this, and the connection between the connector 2 and the first template 1 can also adopt other structural forms, as long as the function of reducing concentrated force by increasing the connection area can be achieved; the connection method between the connector 2 and the first template 1 can also be other methods besides welding, for example, the connector 2 can be designed to be a shape that is conducive to bolt connection, and then connected using high-strength bolts, or the "L"-shaped structure can be buried in the first template 1, etc., as long as the strength and stability requirements of the connection can be met, the present invention does not make specific limitations on this.

[0056] In this embodiment, the upper ends of several connecting members 2 can be sleeved with fasteners 21 and pads 22, and the fasteners 21 can be fastened to the steel member 3 through the pads 22. The fasteners 21 and pads 22 can be used to fix the steel member 3 to the connecting members 2.

[0057] Specifically, the connecting member 2 can be a metal rod, the upper end of which can be provided with an external thread to form a screw structure, and the fastener 21 can be a nut, the internal thread of the nut can cooperate with the external thread of the screw, so that the nut can be tightened on the screw; the pad 22 can be made of steel material. When tightening, the pad 22 can be firstly sleeved on the screw, so that the lower end surface of the pad 22 abuts against the upper end surface of the steel member 3, and then the nut is screwed on the screw and tightened until the nut is pressed on the pad 22, so that the lower end surface of the nut is tightly attached to the pad 22, thereby realizing the fixed connection between the connecting member 2 and the steel member 3; here, both the nut and the screw can be selected to have sufficient strength, so that after the nut and the screw are installed together, a high-strength bolt can be formed to meet the load requirements; but the utility model is not limited to this, and the connection method between the connecting member 2 and the steel member 3 is not limited to the above-mentioned bolt connection, and can also be carried out by welding and other methods, and the utility model does not make specific limitations on this.

[0058] Here, the use of a screw and nut combination connection method at the connection between the upper end of the connecting piece 2 and the steel member 3 can improve the installation efficiency while ensuring the stability of the connection. During installation, it is only necessary to pass the upper end screw portion of the connecting piece 2 through the through hole reserved on the steel member 3, and then put the fastener 21 (nut) and the pad 22 on the screw portion that passes through the top of the steel member 3, and tighten the nut to complete the connection. The operation steps are simple. Since the connecting piece 2 and the steel member 3 can be permanently retained in the joint section after casting without disassembly, the utility model can also use methods such as welding to fix the connecting piece 2 and the steel member 3.

[0059] Optionally, the installation position of the steel member 3 can be adjusted according to different beam structures. For example, in the box beam structure in this embodiment, the steel member 3 installed at the position of the box beam cavity is installed on the bottom surface of the cavity, and the corresponding connector 2 is connected between the bottom surface of the cavity and the first template 1; the steel members 3 installed on both sides of the cavity are installed on the upper end surface of the entire joint section, and the corresponding connector 2 penetrates the concrete of the entire joint section and is connected between the upper end surface of the joint section and the first template 1. In addition to the box beam, if the joint section is formed as a solid structure, the steel member 3 can be installed on the upper end surface of the joint section; the position of the steel member 3 in the utility model can be selected according to the specific beam structure, and the utility model does not make specific restrictions on this.

[0060] In this embodiment, limiting mechanisms 5 can be installed at both ends of the steel structure 3 located at the top end of the box beam. The limiting mechanism 5 may include at least two limiting plates 51 and anchors 52. The anchors 52 can be installed at the lower ends of the limiting plates 51 and can be used to anchor the limiting mechanism 5 in the existing bridge section 6. The steel structure 3 can be inserted into the limiting mechanism 5 and located between the two limiting plates 51, so that the two limiting plates 51 are respectively attached to the two sides of the steel structure 3. The limiting mechanism 5 is used to prevent the template device from lateral displacement.

[0061] Specifically, each limiting mechanism 5 may include two limiting plates 51 and four anchors 52. Two anchors 52 are installed at the lower end of each limiting plate 51 at intervals in the vertical direction. The limiting plate 51 may be a steel plate, and the anchor 52 may be an anchoring steel bar. The two limiting plates 51 may be symmetrically arranged on the left and right sides of the steel member 3; however, the utility model is not limited to this. Multiple limiting plates 51 may be arranged along the length direction of the steel member 3 in each limiting mechanism 5, and the number of anchors 52 may also be adjusted accordingly according to the limiting plates 51, and is not limited to the above-mentioned options. The utility model does not make specific limitations on this.

[0062] Here, for the existing bridge section 6 before the joint is closed, usually because it extends outward from the bridge pier for a long distance, the connection between the existing bridge section 6 and the joint section is susceptible to external forces (such as wind force, etc.) and causes lateral (i.e., bridge width direction) shaking. Since the formwork device of the utility model is not rigidly connected to the existing bridge sections 6 on both sides, the formwork device is prone to lateral displacement under the lateral shaking of the existing bridge section 6, and in severe cases, it may even fall from both sides. Therefore, adding a limiting mechanism 5 at both ends of the steel member 3 can effectively prevent the joint section from lateral displacement. Specifically, the steel member 3 is The two ends of the component 3 pass through the limiting mechanism 5 respectively, and the lower end of the limiting mechanism 5 is fixed to the existing bridge section 6 by the anchor 52, so that the steel component 3 can be kept relatively fixed with the existing bridge section 6 in the lateral direction under the action of the limiting mechanism 5, thereby avoiding the lateral displacement of the template device or the whole joint section; in addition, the limiting mechanism 5 does not restrict the length direction of the steel component 3 on the front and rear sides. Therefore, when the bridge body is deformed and displaced in the length direction due to thermal expansion and contraction, the steel component 3 can slide freely back and forth in the limiting mechanism 5 and will not be deformed with the thermal expansion and contraction of the bridge body.

[0063] Exemplary Embodiment 2

[0064] This exemplary embodiment provides a bridge span closure section.

[0065] The bridge span closure section described in this exemplary embodiment can be cast using the formwork device of the bridge span closure section described in exemplary embodiment 1; the bridge span closure section described in this exemplary embodiment can also include concrete 7 cast in the formwork device of the bridge span closure section, as well as the first formwork 1, connecting parts 2 and other structures.

[0066] The formwork device for the bridge span closure section described in this exemplary embodiment has the same structure and function as the formwork device for the bridge span closure section in exemplary embodiment 1, and this exemplary embodiment will not elaborate on this.

[0067] Exemplary Embodiment 3

[0068] The present exemplary embodiment provides a bridge.

[0069] The bridge described in this exemplary embodiment may include the bridge span joint section described in exemplary embodiment 2; the bridge described in this exemplary embodiment may also include at least two existing bridge sections 6, and the two existing bridge sections 6 may be respectively connected to both sides of the bridge span joint section to form the overall structure of the bridge.

[0070] The structure and function of the bridge span closure section described in this exemplary embodiment are consistent with those of the bridge span closure section in Exemplary Embodiment 2, and this exemplary embodiment will not elaborate on this.

[0071] Example 4

[0072] This exemplary embodiment provides a construction method for a bridge span closure section.

[0073] The construction method of the bridge span joint section described in this exemplary embodiment may adopt the formwork device of the bridge span joint section described in exemplary embodiment 1.

[0074] The construction method of the bridge span closure section described in this exemplary embodiment may include the following steps:

[0075] S1: Estimate the overall quality of the bridge span after pouring, and then select the materials of steel members 3, connectors 2 and so on to meet the strength and stiffness requirements based on the estimated value. At the same time, determine the number of steel members 3 installed between the existing bridge sections 6, the spacing between adjacent steel members 3, the size of the steel members 3, and simultaneously adjust the size and layout density of connectors 2 and other parameters.

[0076] S2: Both ends of the plurality of steel members 3 are simultaneously erected in the existing bridge sections 6 on both sides according to the set positions.

[0077] S3: Fix the plurality of connectors 2 on the first template 1 by welding or other feasible methods. (This step can be performed on the ground)

[0078] S4: Install the limiting mechanisms 5 at both ends of the steel member 3 so that both ends of the steel member 3 are passed through the limiting mechanisms 5 , and anchor the lower end of the limiting mechanisms 5 in the existing bridge section 6 .

[0079] S5: hoist the first template 1 and the connecting member 2 as a whole to the gap between the two existing bridge sections 6 for installation.

[0080] S6: Each steel member 3 is fixedly connected to the corresponding multiple connecting members 2 by high-strength bolts, and a professional technician uses a second-class level to measure whether there is a deviation between the first template and the existing bridge section. If there is a deviation, it can be adjusted by bolts.

[0081] S7: Install the second template 4 above the first template 1 to form a template device.

[0082] S8: pouring concrete 7 into the pouring space of the formwork device to form a joint section.

[0083] S9: After the concrete 7 to be poured solidifies, the second formwork 4 is removed.

[0084] S10: Lay the bridge deck on the upper surface of the joint section and complete the construction.

[0085] Among them, S4 can also be placed after S2, S2 and S3 can be carried out at the same time; S7 and S8 can also be replaced by the following content:

[0086] S7: First, pour a layer of concrete 7 into the first formwork 1 to form a box beam bottom plate, so that the upper surface of the concrete 7 reaches the lower surface of the steel member 3. After the concrete 7 solidifies, install the second formwork 4 on the solidified concrete 7.

[0087] S8: Continue pouring concrete 7 into the pouring space formed between the first formwork 1 and the second formwork 4 to complete the overall pouring to form a joint section.

[0088] In summary, the formwork device of the bridge span joint section of the utility model adopts multiple supporting members arranged side by side, which can directly set up the formwork in the existing bridge section in the bridge span joint section on the front and rear sides, thereby improving the support performance of the formwork for the gravity load applied by pouring concrete, and thus eliminating the need to add additional supporting equipment below in an environment where construction conditions are restricted above the operating area such as a railway, thereby simplifying the construction process and operation flow, and further improving the construction efficiency and operation safety. The gravity load brought by materials such as concrete during the integral pouring of the bridge span joint section of the utility model can be evenly distributed in the formwork device, and can be shared by the steel components and L-shaped connectors arranged along the width and length of the bridge, thereby reducing the load on the existing steel bars in the bridge section and effectively improving the bearing performance; in addition, after pouring, the first formwork and connector in the formwork device can be permanently retained in the joint section without disassembly, and in order to further improve the strength of the joint section, the steel components can also be retained without disassembly, thereby simplifying the pouring operation method and improving the pouring construction efficiency. The bridge of the utility model is also connected to the existing bridge sections on both sides of the bridge span joint section, so as to form an integral bridge body. During casting, the joint section of the bridge can share the load by using the steel members and L-shaped connectors arranged in the template device along the bridge width and bridge length. After casting, the template and other components permanently retained in the joint section and the existing and newly added steel bar structures in the bridge body can be used to share the load, and its bearing performance is better than the existing bridge body. The construction method of the bridge span joint section of the utility model can respectively set up steel members in parallel along the bridge width between the two existing bridge sections, and install connectors on the first template along the bridge width and bridge length, and then connect each steel member with the corresponding connector, so that the gravity load borne by the template during casting can be evenly distributed to each connector and steel member, avoiding stress concentration. Compared with the existing construction method of welding the template to the existing steel bars, which is easy to cause stress concentration and cannot be freely adjusted, the construction method of the utility model can effectively avoid the above problems and improve the bearing performance.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A formwork device for a bridge span closure section, characterized in that: It comprises a first template (1), a plurality of connecting members (2) and a plurality of steel members (3), wherein: The steel structure (3) is erected between two corresponding existing bridge sections (6), and a plurality of the steel structure (3) are spaced apart along the width direction of the bridge; the connecting member (2) is connected between the first formwork (1) and the corresponding steel structure (3), and a plurality of the connecting members (2) are spaced apart along the length direction of the steel structure (3); concrete (7) can be poured into the first formwork (1) to form a joint section.

2. The formwork device for the bridge span closure section according to claim 1 is characterized in that: It also comprises a second template (4), wherein the second template (4) is fixedly connected to the first template (1) via the connecting piece (2), and the second template (4) and the first template (1) can be combined to form a pouring space for pouring concrete (7).

3. The formwork device for the bridge span closure section according to claim 1 is characterized in that: It also comprises a second template (4), wherein the second template (4) is placed on the poured concrete (7), and the second template (4) and the first template (1) can be combined to form a pouring space for pouring concrete (7).

4. The formwork device for the bridge span closure section according to claim 1 is characterized in that: The connecting piece (2) is detachably connected to the corresponding steel member (3), and the connecting piece (2) is fixedly connected to the first template (1).

5. The formwork device for the bridge span closure section according to claim 1 is characterized in that: The connecting member (2) It is an "L"-shaped structure, one section of the "L"-shaped structure is connected to the steel member (3), and the other section of the "L"-shaped structure is fixedly connected to the first template (1).

6. The formwork device for the bridge span closure section according to any one of claims 1 to 5, characterized in that: Limiting mechanisms (5) are installed at both ends of the steel structure (3), and the limiting mechanisms (5) include at least two limiting plates (51) and anchors (52). The anchors (52) are installed at the lower ends of the limiting plates (51) and are used to anchor the limiting mechanisms (5) in the existing bridge section (6). The steel structure (3) is inserted into the limiting mechanisms (5) and is located between the two limiting plates (51). The limiting mechanisms (5) are used to prevent the template device from lateral displacement.

7. The formwork device for the bridge span closure section according to claim 1 is characterized in that: It also comprises a fastener (21) and a pad (22), wherein the fastener (21) and the pad (22) are sleeved on the connecting member (2), and the fastener (21) can be pressed against the upper end of the steel member (3) through the pad (22) to connect the connecting member (2) and the steel member (3).

8. The formwork device for the bridge span closure section according to claim 7, characterized in that: The upper part of the connecting member (2) is formed as a screw rod, and the fastener (21) is a nut, which can be connected with the screw rod to form a bolt.

9. A bridge span closure section, characterized in that: The bridge span closure section is cast by the formwork device of any one of claims 1 to 8; the bridge span closure section comprises the first formwork (1), the connecting member (2) and concrete (7).

10. A bridge, characterized in that: Including the bridge span closure section described in claim 9.

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