Railway multifunctional suspension irrigation construction equipment and method

Abstract

The invention relates to the technical field of bridge construction, in particular to multifunctional suspension irrigation construction equipment and method for a railway. Comprising a supporting system which can support the suspension irrigation equipment on an existing bridge surface. The main beam extends in the length direction of the bridge. The main beam is provided with an inverted-U-shaped portal frame, a cross beam of the inverted-U-shaped portal frame can abut against the main beam, and an opening of the cross beam faces the bottom of the main beam. A bottom platform is arranged at the bottom of the main beam and used for supporting the bottom face of the bridge. The formwork system comprises an outer formwork and an inner formwork, and the outer formwork is connected with the two ends of the opening of the inverted-U-shaped door frame. A plurality of vertical prestressed tendons are arranged between the outer formwork and the inner formwork and evenly distributed along the peripheral side of the inner formwork, one ends of the vertical prestressed tendons are connected with the main beam, and the other ends of the vertical prestressed tendons are connected with the bottom platform. Therefore, the to-be-erected bridge can be directly poured by adopting the pre-tensioning method to construct the vertical prestressed tendons on site, and the potential safety hazards that the grouting quality of a post-tensioning method is difficult to guarantee, the tension stress is uncontrollable and the like are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a railway multifunctional suspended pouring construction equipment and method. Background Art

[0002] With the development of railway passenger dedicated lines, the "bridge-replacing-road" construction mode of my country's high-speed railways has led to an increasing proportion of bridges, and continuous beam bridges are the largest type of bridges. There are many methods for the construction of continuous beam bridges, mainly including the cast-in-place method, cantilever pouring method, cantilever assembly method, and jacking method. Among them, the cantilever pouring process of bridges avoids the need to set up a large number of supports, does not require large lifting equipment, and can speed up the construction progress. Especially under the conditions of high piers, deep water, and unable to interrupt traffic, the cantilever pouring method can better reflect its advantages.

[0003] Existing cantilever pouring equipment mostly adopts truss structure. During the bridge construction process, it is impossible to use the pre-tensioning method to set the vertical prestressed tendons for on-site pouring. In addition, the assembly and disassembly are cumbersome and require much manual participation. Summary of the invention

[0004] The purpose of the present invention is to provide a multifunctional suspended pouring construction equipment and method for railways, which can use the pre-tensioning method to construct vertical prestressed tendons and cast railway bridges on site.

[0005] To achieve the above object, the present invention provides a railway multifunctional suspended pouring construction equipment, comprising:

[0006] A support system, the support system comprising a main beam, a bottom platform and an inverted U-shaped portal frame, the main beam extending along the length direction of the bridge; an inverted U-shaped portal frame is provided on the main beam, the cross beam of the inverted U-shaped portal frame can abut against the main beam, and the opening of the inverted U-shaped portal frame faces the bottom of the main beam; the bottom of the main beam is provided with the bottom platform, and the bottom platform is used to support the bottom surface of the bridge;

[0007] The formwork system comprises an outer formwork and an inner formwork, wherein the outer formwork is connected to both ends of the inverted U-shaped portal frame opening; a plurality of vertical prestressed tendons are arranged between the outer formwork and the inner formwork, and the plurality of vertical prestressed tendons are evenly distributed along the outer circumference of the inner formwork, one end of the vertical prestressed tendon is connected to the main beam, and the other end is connected to the bottom platform.

[0008] Optionally, it also includes a running device, which is fixedly connected to the existing bridge deck, and the running device is connected to one end of the main beam close to the existing bridge deck, and the running device is used to drive the main beam to move along the length direction of the bridge.

[0009] Optionally, a reaction column is further provided between the main beam and the bottom platform, wherein the reaction column extends in a vertical direction and is connected to the pin shaft.

[0010] Optionally, the outer template is connected to the inverted U-shaped portal frame via a telescopic mechanism.

[0011] Optionally, the telescopic mechanism includes a first telescopic rod and a second telescopic rod, the first telescopic rod can be telescoped along the height direction of the bridge, and the second telescopic rod can be telescoped along the width direction of the bridge;

[0012] The fixed end of the first telescopic rod is slidably connected to the open end of the inverted U-shaped door frame, and the telescopic end of the first telescopic rod is fixedly connected to the outer template;

[0013] The fixed end of the second telescopic rod is fixedly connected to a side of the opening end of the inverted U-shaped door frame away from the first telescopic rod, and the telescopic end of the second telescopic rod is fixedly connected to the fixed end of the first telescopic rod.

[0014] Optionally, a connector is provided at the end of the vertical prestressed tendon, and the connector is used to connect the vertical prestressed tendon and a tensioning pedestal.

[0015] Optionally, the connector includes a steel rod and a connecting anchor, the connecting anchor is provided with a plurality of insertion holes, and a plurality of the prestressed steel bars are respectively and one by one inserted into the insertion holes; the steel rod is vertically arranged on a side of the connecting anchor away from the vertical prestressed steel bars, and the steel rod is detachably connected to the connecting anchor.

[0016] Optionally, the steel rod is threadedly connected to the connecting anchor.

[0017] Optionally, an operating platform is provided on the lower side of the bottom platform, and the operating platform is used for construction workers to pass through.

[0018] The present invention also provides a construction method using the above-mentioned railway multifunctional suspended pouring construction equipment, comprising the following steps:

[0019] S1: Anchor the railway multifunctional suspended pouring construction equipment on the existing bridge section, and adjust the outer template to the specified elevation according to the design elevation value and the preload deflection value of the bridge-building machine;

[0020] S2: Binding the bottom plate, web reinforcement and installation reserved holes, longitudinal prestressed pipes, and vertical prestressed tendons;

[0021] S3: Install the inner mold in place and adjust the inner mold elevation;

[0022] S4: Tie the top plate reinforcement and install the reserved holes and longitudinal prestressed pipes at the top plate position;

[0023] S5: fine-tune the elevation of the vertical prestressed tendons and tension the vertical prestressed tendons to make the tensioning force reach the design value;

[0024] S6: roughening and moistening the concrete at the interface of the existing beam section, and symmetrically pouring the concrete of the beam section to be erected;

[0025] S7: tensioning longitudinal prestressed tendons and grouting;

[0026] S8: After the poured concrete reaches the designed strength and elastic modulus, the vertical prestressed tendons are released, the end formwork and the inner formwork are removed, the outer formwork is loosened, and the concrete joint surface is processed;

[0027] S9: Release the bottom mold and move the equipment forward to the next beam section to be erected.

[0028] The technical solution provided by the present invention has the following advantages compared with the prior art:

[0029] The multifunctional suspended pouring construction equipment for railway provided by the present invention can support the suspended pouring equipment on the existing bridge deck by setting a support system. The support system includes a main beam, a bottom platform and an inverted U-shaped portal frame, and the main beam extends along the length direction of the bridge; an inverted U-shaped portal frame is provided on the main beam, and the crossbeam of the inverted U-shaped portal frame can abut against the main beam, and the opening of the inverted U-shaped portal frame faces the bottom of the main beam. A bottom platform is provided at the bottom of the main beam, and the bottom platform is used to support the bottom surface of the bridge. By setting a template system, the template system includes an outer template and an inner template, and the outer template is connected to both ends of the opening of the inverted U-shaped portal frame. A plurality of vertical prestressed tendons are provided between the outer template and the inner template, and the plurality of vertical prestressed tendons are evenly distributed along the outer peripheral side of the inner template, and one end of the vertical prestressed tendons is connected to the main beam, and the other end is connected to the bottom platform. Therefore, the vertical prestressed tendons can be constructed on site by the pre-tensioning method and the bridge to be constructed can be directly cast. The setting of the vertical prestressed tendons can effectively improve the crack resistance of the web and inhibit the development of web cracks. The pre-tensioning method is used to construct vertical prestressed tendons without grouting, which avoids safety hazards such as loose grouting and uncontrollable tensioning stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0032] Figure 1 This is a first view of the structure of the railway multifunctional suspended pouring construction equipment according to an embodiment of the present invention;

[0033] Figure 2This is a second view of the structure of the railway multifunctional suspended pouring construction equipment according to an embodiment of the present invention;

[0034] Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle;

[0035] Figure 4 This is a third view of the structure of the railway multifunctional suspended pouring construction equipment according to an embodiment of the present invention;

[0036] Figure 5 The present invention is a flowchart of the construction method described in an embodiment of the present invention.

[0037] Among them, 1. main beam; 2. bottom platform; 21. reaction column; 22. operating platform; 3. inverted U-shaped gantry; 4. outer formwork; 5. inner formwork; 6. vertical prestressed tendons; 61. connector; 611. steel rod; 612. connecting anchor; 7. running device; 8. first telescopic rod; 9. second telescopic rod. DETAILED DESCRIPTION

[0038] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0040] The following is a detailed description of the railway multifunctional suspended pouring construction equipment and method by means of specific embodiments:

[0041] like Figures 1 to 4 As shown, the railway multifunctional suspended pouring construction equipment provided by the present invention comprises:

[0042] The support system includes a main beam 1, a bottom platform 2 and an inverted U-shaped portal frame 3. The main beam 1 extends along the length direction of the bridge; the main beam 1 is provided with an inverted U-shaped portal frame 3, the cross beam of the inverted U-shaped portal frame 3 can abut against the main beam 1, and the opening of the inverted U-shaped portal frame 3 faces the bottom of the main beam 1; the bottom of the main beam 1 is provided with a bottom platform 2, and the bottom platform 2 is used to support the bottom surface of the bridge;

[0043] The formwork system includes an outer formwork 4 and an inner formwork 5. The outer formwork 4 is connected to both ends of the opening of the inverted U-shaped portal frame 3. A plurality of vertical prestressed tendons 6 are arranged between the outer formwork 4 and the inner formwork 5. The plurality of vertical prestressed tendons 6 are evenly distributed along the outer peripheral side of the inner formwork 5. One end of the vertical prestressed tendon 6 is connected to the main beam 1, and the other end is connected to the bottom platform 2.

[0044] The main beam 1 can be two beams parallel to each other, and the cross section of the main beam 1 can be rectangular. There can also be two inverted U-shaped portal frames 3, and the two inverted U-shaped portal frames 3 are arranged in parallel front and back above the main beam 1. The crossbeam of the inverted U-shaped portal frame 3 can be in contact with the main beam 1, which means that the inverted U-shaped portal frame 3 is arranged with the opening above the main beam 1 facing downward. Therefore, a horizontal crossbeam away from the opening can be overlapped on the main beam 1, and the two ends of the opening are mainly used to support the formwork system. Furthermore, the bottom platform 2 can be a frame with a supporting function formed by welding a steel frame. It can be understood that the beam body to be erected is between the main beam 1 and the bottom platform 2, which can be a box beam or a T-beam, and the formwork system is set according to specific needs.

[0045] Specifically, the template system includes an inner template 5 and an outer template 4, and the shapes and sizes of the inner template 5 and the outer template 4 are set according to the specific shape of the beam body. Of course, the template system can also include an end template and a bottom template. The outer template 4 is connected to the two ends of the opening of the inverted U-shaped door frame 3, such as Figure 2 As shown, the two ends of the outer formwork 4, i.e., the two ends of the bridge, overlap with the two ends of the opening of the inverted U-shaped portal frame 3 to form a hook structure. Therefore, a connection structure can be set at the hook end of the inverted U-shaped portal frame 3, and then connected to the two ends of the outer formwork 4. Further, a plurality of vertical prestressed tendons 6 are set between the outer formwork 4 and the inner formwork 5, and then the beam body can be cast on site by the pre-tensioning method. Specifically, the vertical prestressed tendons 6 refer to the height direction along the bridge body, and the number of vertical prestressed tendons 6 is set according to the strength requirements of the bridge body. Multiple vertical prestressed tendons 6 are evenly distributed along the outer peripheral side of the inner formwork 5, which means that the vertical prestressed tendons 6 are evenly distributed between the inner formwork 5 and the outer formwork 4, that is, the vertical prestressed tendons 6 are set in the concrete beam body to enhance the strength of the beam body. Further, one end of the vertical prestressed tendon 6 is connected to the main beam 1, and an insertion hole can be set on the main beam 1, and the prestressed tendons are inserted into the main beam 1 and fixed so that the prestressed tendons will not fall out. The other end of the prestressed tendon can be connected to the bottom platform 2 in the same way. Therefore, after the pouring is completed, the prestressed tendons can be cut and the fracture can be processed after the concrete beam reaches the design strength and elastic modulus, and then the vertical prestressed tendons 6 of the next bridge section to be erected can be re-inserted to cast the next section of the beam. Of course, longitudinal prestressed tendons can also be set, that is, prestressed tendons are set in the length direction of the bridge body. It can be understood that the longitudinal prestressed tendons can be post-tensioned, that is, a longitudinal corrugated tube is set on the inner template 5 and longitudinal prestressed tendons are set in the corrugated tube.

[0046] The multifunctional suspended pouring construction equipment for railway provided by the present invention can support the suspended pouring equipment on the existing bridge deck by setting a support system. The support system includes a main beam 1, a bottom platform 2 and an inverted U-shaped portal frame 3. The main beam 1 extends along the length direction of the bridge; an inverted U-shaped portal frame 3 is provided on the main beam 1, and the crossbeam of the inverted U-shaped portal frame 3 can abut against the main beam 1, and the opening of the inverted U-shaped portal frame 3 faces the bottom of the main beam 1. A bottom platform 2 is provided at the bottom of the main beam 1, and the bottom platform 2 is used to support the bottom surface of the bridge. By setting a template system, the template system includes an outer template 4 and an inner template 5, and the outer template 4 is connected to both ends of the opening of the inverted U-shaped portal frame 3. A plurality of vertical prestressed tendons 6 are provided between the outer template 4 and the inner template 5, and the plurality of vertical prestressed tendons 6 are evenly distributed along the outer peripheral side of the inner template 5, and one end of the vertical prestressed tendons 6 is connected to the main beam 1, and the other end is connected to the bottom platform 2. Therefore, the pre-stressing method can be used on site to directly cast the bridge to be erected. The vertical prestressed tendons 6 can increase the vertical stress and strength of the bridge, avoiding the prefabrication of concrete components with the vertical prestressed tendons 6 in a prefabrication factory, which not only improves construction efficiency but also reduces manual participation.

[0047] Furthermore, the railway multifunctional suspended pouring construction equipment provided by the present invention also includes a running device 7, which is fixedly connected to the existing bridge deck, and is connected to one end of the main beam 1 close to the existing bridge deck, and the running device 7 is used to drive the main beam 1 to move along the length direction of the bridge.

[0048] The above-mentioned running device 7 can be a running wheel, and the running device is arranged between the main beam 1 and the bridge deck, or a running beam can be arranged between the main beam 1 and the bridge body, and a driving mechanism is arranged to make the main beam 1 and the running beam move relative to each other. Of course, the running device can also be other structures with a running function, as long as it can play the role of driving the main beam 1.

[0049] Furthermore, a reaction column 21 is provided between the main beam 1 and the bottom platform 2 . The reaction column 21 extends in the vertical direction and is connected to a pin shaft.

[0050] One end of the reaction column 21 can be connected to the bottom platform 2 by bolts, and the other end can be connected to the main beam 1. Specifically, a mounting hole can be opened on the main beam 1 so that the reaction column 21 is inserted into the mounting hole. It is understandable that the reaction column 21 and the main beam 1 can be relatively locked, and a locking hole can be set on the main beam 1. After the reaction column 21 is installed in place, bolts are passed through the locking hole and the reaction column 21 in the mounting hole to achieve the purpose of locking. The reaction column 21 mainly plays the role of supporting the front end of the main beam 1. In order to adapt to the construction process, a plurality of adjustment holes can be set in the vertical direction on the reaction column 21. When Zhulang needs to be raised or lowered, it can be slidably connected to the main beam 1 by adjusting different adjustment holes. Of course, it is understandable that during the construction process, the reaction column 21 is in a locked state relative to the main beam 1.

[0051] like Figure 2 and Figure 3 As shown, the outer template 4 is connected to the inverted U-shaped door frame 3 through a telescopic mechanism.

[0052] The telescopic mechanism comprises a first telescopic rod 8 and a second telescopic rod 9. The first telescopic rod 8 can be telescoped in the height direction of the bridge, and the second telescopic rod 9 can be telescoped in the width direction of the bridge.

[0053] The fixed end of the first telescopic rod 8 is slidably connected to the open end of the inverted U-shaped door frame 3 , and the telescopic end of the first telescopic rod 8 is fixedly connected to the outer template 4 .

[0054] The fixed end of the second telescopic rod 9 is fixedly connected to a side of the open end of the inverted U-shaped door frame 3 away from the first telescopic rod 8 , and the telescopic end of the second telescopic rod 9 is fixedly connected to the fixed end of the first telescopic rod 8 .

[0055] That is to say, the first telescopic rod 8 and the second telescopic rod 9 are perpendicular to each other. The structure of the first telescopic rod 8 can be the same as that of the second telescopic rod 9. The first telescopic rod 8 and the second telescopic rod 9 can be structures with telescopic functions such as hydraulic cylinders or cylinders.

[0056] Specifically, the fixed end of the first telescopic rod 8 is connected to the return hook end of the inverted U-shaped gantry 3 and can slide in the horizontal direction. It is understandable that the fixed end of the first telescopic rod 8 can slide relative to and lock with the return hook end of the inverted U-shaped gantry 3. The telescopic end of the first telescopic rod 8 is connected to the outer template 4, which can be connected by bolts or welding. Therefore, during the telescopic process of the first telescopic rod 8, the outer template 4 can be driven to move up and down to adjust the height of the outer template 4. The fixed end of the second telescopic rod 9 can be connected to the return hook end of the inverted U-shaped gantry 3 by bolts or welding, and the telescopic end of the second telescopic rod 9 is connected to the fixed end of the first telescopic rod 8, which can be connected by welding or bolts. Therefore, when the second telescopic rod 9 is telescopic, the first telescopic rod 8 can be pushed to slide in the horizontal direction, thereby adjusting the width of the outer template 4. It is understandable that the first telescopic rod 8 and the second telescopic rod 9 are telescopic successively.

[0057] In some embodiments, a connector 61 is provided at the end of the vertical prestressed tendon 6, and the connector 61 is used to connect the vertical prestressed tendon 6 and the tensioning pedestal.

[0058] The connector 61 includes a steel rod 611 and a connection anchor 612. The connection anchor 612 is provided with a plurality of insertion holes, and a plurality of prestressed steel bars are inserted into the insertion holes one by one. The steel rod 611 is vertically arranged on a side of the connection anchor 612 away from the vertical prestressed steel bar 6, and the steel rod 611 and the connection anchor 612 are detachably connected.

[0059] The above-mentioned connecting anchor 612 can be a disc structure, and a plurality of through holes can be opened on the disc, and the plurality of through holes are evenly distributed along the circumference of the disc. Therefore, one disc can connect multiple vertical prestressed tendons 6. Multiple connectors 61 can be set in the circumference of the inner template 5, and the specific setting can be based on actual conditions. A steel rod 611 can be set in the middle of the disc, and the steel rod 611 protrudes from the disc and extends to the upper end of the main beam 1. The end of the steel rod 611 can be connected to the tensioning pedestal to tension the vertical prestressed tendons 6. Furthermore, when the prestressed tendons are released, the steel rod 611 can be directly removed to avoid wasting resources caused by cutting the prestressed tendons. Of course, a connector 61 can also be set on the bottom platform 2 to facilitate disassembly.

[0060] Furthermore, the steel rod 611 is threadedly connected to the connecting anchor 612 .

[0061] Therefore, when disassembling the connector 61, the steel rod 611 can be disassembled and assembled by simply twisting it, which is convenient for recycling.

[0062] Furthermore, an operating platform 22 is provided on the lower side of the bottom platform 2, and the operating platform 22 is used for construction workers to pass through.

[0063] The operating platform 22 may be a pedestrian walkway, and the operating platform 22 may be bolted to the bottom platform 2 . Construction personnel may perform tensioning or disassembly operations on the vertical prestressed tendons 6 on the operating platform 22 .

[0064] like Figure 5 As shown, the present invention also provides a construction method using the railway multifunctional suspended pouring construction equipment as described above, comprising the following steps:

[0065] S1: Anchor the railway multifunctional suspended grouting construction equipment on the existing bridge section and perform a preload test on it to ensure that the equipment can operate normally. Adjust the outer template to the specified elevation based on the design elevation value and the equipment preload deflection value;

[0066] S2: Cut and process the steel bars and tie the bottom formwork of the beam body, the web steel bars, and at the same time cut and process the corrugated pipe and install the reserved holes, the longitudinal prestressed pipe, i.e. the corrugated pipe, and the vertical prestressed tendons;

[0067] S3: Install the inner mold in place and adjust the inner mold elevation;

[0068] S4: Tie the top plate reinforcement and install the reserved holes and longitudinal prestressed pipes at the top plate position;

[0069] S5: fine-tune the elevation of the vertical prestressed tendons, and use tensioning equipment to tension the vertical prestressed tendons so that the tensioning force reaches the design value;

[0070] S6: Before pouring, concrete test pieces are made. After passing the test, the concrete is mixed and transported to the site for pouring. Then, the concrete is cured, the concrete at the interface of the beam erection section is roughened and moistened, and the concrete of the beam erection section is poured symmetrically;

[0071] S7: tensioning longitudinal prestressed tendons and grouting;

[0072] S8: After the poured concrete reaches the designed strength and elastic modulus, the vertical prestressed tendons are released, the end formwork and the inner formwork are removed, the outer formwork is loosened, and the concrete joint surface is processed;

[0073] S9: Release the bottom mold and move the equipment forward to the next beam section to be erected.

[0074] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0075] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A railway multifunctional suspended pouring construction equipment, characterized in that: include: A support system, the support system comprising a main beam (1), a bottom platform (2) and an inverted U-shaped portal frame (3), the main beam (1) extending along the length direction of the bridge; an inverted U-shaped portal frame (3) is provided on the main beam (1), the cross beam of the inverted U-shaped portal frame (3) can abut against the main beam (1), and the opening of the inverted U-shaped portal frame (3) faces the bottom of the main beam (1); the bottom of the main beam (1) is provided with the bottom platform (2), and the bottom platform (2) is used to support the bottom surface of the bridge; A formwork system, the formwork system comprising an outer formwork (4) and an inner formwork (5), the outer formwork (4) being connected to both ends of the opening of the inverted U-shaped portal frame (3); a plurality of vertical prestressed tendons (6) being arranged between the outer formwork (4) and the inner formwork (5), the plurality of vertical prestressed tendons (6) being evenly distributed along the outer circumference of the inner formwork (5), one end of the vertical prestressed tendons (6) being connected to the main beam (1), and the other end being connected to the bottom platform (2).

2. The railway multifunctional suspended pouring construction equipment according to claim 1 is characterized in that: It also includes a running device (7), which is fixedly connected to the existing bridge deck, and the running device (7) is connected to one end of the main beam (1) close to the existing bridge deck, and the running device (7) is used to drive the main beam (1) to move along the length direction of the bridge.

3. The railway multifunctional suspended pouring construction equipment according to claim 1 is characterized in that: A reaction column (21) is also provided between the main beam (1) and the bottom platform (2); the reaction column (21) extends in a vertical direction and is pin-connected to the main beam (1).

4. The railway multifunctional suspended pouring construction equipment according to claim 1 is characterized in that: The outer template (4) is connected to the inverted U-shaped door frame (3) via a telescopic mechanism.

5. The railway multifunctional suspended pouring construction equipment according to claim 4 is characterized in that: The telescopic mechanism comprises a first telescopic rod (8) and a second telescopic rod (9), wherein the first telescopic rod (8) can be telescoped in a height direction of the bridge, and the second telescopic rod (9) can be telescoped in a width direction of the bridge; The fixed end of the first telescopic rod (8) is slidably connected to the open end of the inverted U-shaped door frame (3), and the telescopic end of the first telescopic rod (8) is fixedly connected to the outer template (4); The fixed end of the second telescopic rod (9) is fixedly connected to a side of the open end of the inverted U-shaped door frame (3) away from the first telescopic rod (8), and the telescopic end of the second telescopic rod (9) is fixedly connected to the fixed end of the first telescopic rod (8).

6. The railway multifunctional suspended pouring construction equipment according to claim 1 is characterized in that: A connector (61) is provided at the end of the vertical prestressed tendon (6), and the connector (61) is used to connect the vertical prestressed tendon (6) and a tensioning pedestal.

7. The railway multifunctional suspended pouring construction equipment according to claim 6 is characterized in that: The connector (61) includes a steel rod (611) and a connecting anchor (612), wherein the connecting anchor (612) is provided with a plurality of insertion holes, and a plurality of the vertical prestressed tendons (6) are respectively and one by one inserted into the insertion holes; the steel rod (611) is vertically arranged on a side of the connecting anchor (612) away from the vertical prestressed tendons (6), and the steel rod (611) and the connecting anchor (612) are detachably connected.

8. The railway multifunctional suspended pouring construction equipment according to claim 7 is characterized in that: The steel rod (611) is threadedly connected to the connecting anchor (612).

9. The railway multifunctional suspended pouring construction equipment according to claim 1, characterized in that: An operating platform (22) is provided on the lower side of the bottom platform (2), and the operating platform (22) is used for construction workers to pass through.

10. A construction method using the railway multifunctional suspended pouring construction equipment according to any one of claims 1 to 9, characterized in that: The steps include: S1: Anchor the railway multifunctional suspended pouring construction equipment on the existing bridge section, and adjust the outer formwork to the specified elevation according to the design elevation value and preload deflection value; S2: Binding the bottom plate, web reinforcement and installation reserved holes, longitudinal prestressed pipes, and vertical prestressed tendons; S3: Install the inner mold in place and adjust the inner mold elevation; S4: Tie the top plate reinforcement and install the reserved holes and longitudinal prestressed pipes at the top plate position; S5: fine-tune the elevation of the vertical prestressed tendons and tension the vertical prestressed tendons to make the tensioning force reach the design value; S6: roughening and moistening the concrete at the interface of the existing beam section, and symmetrically pouring the concrete of the beam section to be erected; S7: tensioning longitudinal prestressed tendons and grouting; S8: After the poured concrete reaches the designed strength and elastic modulus, the vertical prestressed tendons are released, the end formwork and the inner formwork are removed, the outer formwork is loosened, and the concrete joint surface is processed; S9: Release the bottom mold and move the equipment forward to the next beam section to be erected.

Images