Turnout segment box girder production process and method for manufacturing turnout box girder

Abstract

The invention relates to a production process of a turnout segment box girder and a method for manufacturing a turnout box girder. The turnout segment box girder has at least two inwardly concave turnout steel rail grooves, and a post-tensioned prestressed channel is reserved in the turnout segment box girder. The invention adopts a positioning method for manufacturing, and comprises the following steps: S1, cleaning a segment outer mold; S2, inserting and tying the steel bars of the turnout segment box girder; S3, hoisting and adjusting the segment core mold in place; S4, hoisting and tying the steel bars at the top of the turnout segment box girder; S5, hoisting the segment top mold, and adjusting and fixing the turnout steel rail groove steel mold and the steel rail groove steel bars in position; S6, threading a post-tensioned prestressed pipe and installing an end mold; S7, pouring concrete and plastering; S8, curing with steam temperature control of a tarpaulin; S9, pulling out the post-tensioned prestressed pipe after the initial setting of the concrete; S10, removing the mold after the concrete strength reaches 85%, and continuing to sprinkle water for curing after demoulding. The present application can produce segmental box girders of turnouts, which is conducive to the use of segmental transportation and on-site assembly to obtain turnout box girders; it can be applied to situations with limited transportation conditions such as mountain rail transit.

Description

Technical Field

[0001] The invention relates to the technical field of turnout box girder manufacturing, in particular to a turnout segment box girder production process and a method for manufacturing a turnout box girder. Background Art

[0002] A turnout is a line connection device used to transfer rolling stock from one track to another. With a turnout, the line's capacity can be fully utilized. Even for a single-track railway, laying a turnout and building a fork line that is longer than the length of the train can enable trains to run in opposite directions. Therefore, turnouts play an important role on railway lines.

[0003] Box girder is a type of beam in bridge engineering, which is hollow inside and has flanges on both sides of the upper part. Box girders of reinforced concrete structures are divided into prefabricated box girders and cast-in-place box girders. Turnout box girders are box girders used to lay turnouts.

[0004] The existing turnout box girders are all full-hole turnout box girders, which are super wide and super long. Due to the limited transportation conditions at the construction site for mountain (civilian and military dual-use) rail transportation, it is difficult to transport the full-hole turnout box girder to the construction site. Our company has designed a turnout segment box girder, which is transported to the construction site and assembled at the construction site to obtain a segment assembled turnout box girder. The advantage of this method is that the length of each turnout segment box girder is not long or wide, and it can adapt to various transportation conditions. However, how to produce the turnout segment box girder is the first technical problem to be solved. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a production process for a turnout segment box girder and a method for manufacturing a turnout box girder.

[0006] This application is implemented through the following technical solutions:

[0007] The present application provides a production process for a turnout segment box girder, wherein the bridge deck of the turnout segment box girder has at least two inwardly concave turnout rail grooves, and a plurality of post-tensioned prestressed channels for passing post-tensioned prestressed steel bar tendons are reserved in the turnout segment box girder; the present application uses a turnout segment box girder steel mold and adopts a positive position method to manufacture the turnout segment box girder, the turnout segment box girder steel mold includes a bottom mold, a top mold and an end mold, and the bottom mold includes a segment outer mold and a segment core mold, and the turnout segment box girder production process includes the following steps:

[0008] S1, clearing the outer mold of the turnout segment box girder;

[0009] S2, the steel bars of the turnout segment box girder are put into the segment outer formwork and tied;

[0010] S3, the segment core mold is hoisted in and adjusted into place;

[0011] S4, lifting and tying of steel bars at the top of the turnout segment box girder;

[0012] S5, the top formwork of the turnout segment box girder is hoisted in, and the turnout rail groove steel formwork and the rail groove steel bar are aligned, adjusted and fixed;

[0013] S6, threading of post-tensioned prestressed pipes and installation of end formwork of turnout segment box girder;

[0014] S7, pouring concrete and plastering;

[0015] S8, health preservation; this step can be cured by tarpaulin steam temperature control;

[0016] S9, after the initial setting of the concrete, pull out the post-tensioned prestressed pipe;

[0017] S10, after the concrete strength reaches a certain level, the top formwork, end formwork and core formwork of the turnout segment box girder are removed, and curing is continued after demoulding.

[0018] Optionally, in S10, the concrete strength reaches 85% before demoulding, and after demoulding, the turnout segment box girder is transported to the beam storage yard for further watering and curing; after water curing, it is ready for transportation.

[0019] In particular, the top mold includes a top bracket adapted to the turnout segment box beam and a turnout rail groove steel mold adapted to the turnout rail groove, and the turnout rail groove steel mold is installed on the top bracket.

[0020] Optionally, the top support includes a bottom frame, at least two transverse gantries and a plurality of longitudinal gantries, and the longitudinal gantries are adapted to the turnout rail groove steel mold;

[0021] The transverse door frame includes a crossbeam and supporting legs on both sides, and the at least two transverse door frames are arranged longitudinally along the bottom frame at intervals, and the supporting legs on both sides of the transverse door frame are fixedly connected to the side frames of the bottom frame;

[0022] The longitudinal gantry includes a longitudinal beam and supporting legs on both sides. The multiple longitudinal gantries are arranged at intervals along the bottom frame in the transverse direction. The supporting legs on both sides of the longitudinal gantry are fixedly connected to the other two side frames of the bottom frame. The longitudinal beam is connected to the cross beams of the at least two transverse gantries. The turnout rail groove steel mold is fixed to the longitudinal gantry.

[0023] Particularly, the number of the longitudinal gantries is twice the number of the turnout rail groove steel moulds, and one turnout rail groove steel mould is fixed to every two longitudinal gantries, and the turnout rail groove steel mould is located between the two longitudinal gantries.

[0024] Optionally, the top bracket includes a bottom frame, at least two transverse gantries and multiple longitudinal beams, and the longitudinal beams are adapted to the turnout rail groove steel mold; the transverse gantries include cross beams and legs on both sides, and the at least two transverse gantries are longitudinally spaced apart along the bottom frame, and the legs on both sides of the cross beams are fixedly connected to the side frames of the bottom frame; the multiple longitudinal beams are transversely spaced apart along the bottom frame, and the longitudinal beams are connected to the cross beams of the at least two transverse gantries; the number of the longitudinal beams is twice the number of the turnout rail groove steel molds, and one turnout rail groove steel mold is fixed to every two longitudinal beams, and the turnout rail groove steel mold is located between the two longitudinal beams.

[0025] The number of transverse door frames is set according to needs, and there can be a transverse door frame at both ends and the middle of the bottom frame respectively.

[0026] Optionally, the turnout box girder deck has a pair of mainline steel rail grooves and a pair of sideline steel rail grooves formed by inward concave, and the turnout box girder gradually widens from the turnout tip to the turnout tail, and the two steel rail grooves gradually transition to four steel rail grooves;

[0027] The turnout box girder is assembled from 7 turnout segment box girders, and there are 7 steel molds, which are respectively adapted to the 7 turnout segment box girders;

[0028] The first section is a double-groove section, and the top mold of the first section includes two turnout rail groove steel molds; the second section is a double-groove to four-groove section, and the top mold of the second section includes two turnout rail groove steel molds that transition from one groove to two grooves; the third section is a four-groove to three-groove section, and the top mold of the third section includes three turnout rail groove steel molds, and the turnout rail groove steel mold in the middle position transitions from two grooves to one groove; the fourth section is a three-groove section, and the top mold of the fourth section includes three turnout rail groove steel molds; the fifth section is a three-groove to four-groove section, and the top mold of the fifth section includes three turnout rail groove steel molds, and the turnout rail groove steel mold in the middle position transitions from one groove to two grooves; the sixth section and the seventh section are both four-groove sections, and the top molds of the sixth section and the seventh section each include four turnout rail groove steel molds.

[0029] In particular, the first segment is rectangular, and the second segment, the third segment, the fourth segment, the fifth segment, the sixth segment and the seventh segment gradually widen from one end to the other;

[0030] The first segment is a rectangle, the second segment, the third segment, the fourth segment, the fifth segment, the sixth segment and the seventh segment are all right-angled trapezoids, the upper base width of the next right-angled trapezoid segment is equal to the lower base width of the previous right-angled trapezoid segment, and the upper base width of the first right-angled trapezoid segment is equal to the width of the rectangular segment; when the first segment to the seventh segment are assembled in sequence, the long side of the first segment and the right-angled waists of the remaining six segments are in a straight line, and the oblique waists of the second segment to the seventh segment are in a straight line;

[0031] The tail end face of the seventh segment has or does not have a first beam end plane and a second beam end plane set at an angle, the main line rail groove vertically penetrates the first beam end plane, and the side line rail groove vertically penetrates the second beam end plane; when the tail end face of the seventh segment has the first beam end plane and the second beam end plane, the end mold at one end of the seventh segment has two first and second profiles set at an angle, and the first and second profiles are respectively adapted to the first beam end plane and the second beam end plane.

[0032] Optionally, the length of the first segment is 5m and the width is 3m, and the lengths of the remaining 6 segments are all 2.5m; the width of the second segment gradually changes from 3m to 3.5m, the width of the third segment gradually changes from 3.5m to 4m, the width of the fourth segment gradually changes from 4m to 4.5m, the width of the fifth segment gradually changes from 4.5m to 5m, the width of the sixth segment gradually changes from 5m to 5.5m, and the width of the seventh segment gradually changes from 5.5m to 6m.

[0033] The method for manufacturing a turnout box beam provided in the present application comprises the following steps:

[0034] Step 1, using the above-mentioned turnout segment box girder production process to respectively manufacture a plurality of turnout segment box girders;

[0035] Step 2, assembling multiple turnout segment box girders;

[0036] Step 3, the post-tensioned prestressed steel bar tendons are sequentially passed through the post-tensioned prestressed holes of the plurality of turnout segment box girders;

[0037] Step 4, tensioning the prestressed steel tendons;

[0038] Step 5, grouting and anchoring are performed in the post-tensioning prestressed channel to obtain the turnout box girder.

[0039] Compared with the prior art, this application has the following beneficial effects:

[0040] 1. This application adopts the in-situ casting method to produce the turnout segment box girder, which is conducive to the segment transportation and on-site assembly to obtain the turnout box girder; segment transportation can be applied to situations with limited transportation conditions such as mountain rail transit;

[0041] 2. The turnout box girder produced in this application can continuously support the turnout rails with low vibration and noise, which can not only improve the comfort of the vehicle, but also increase the service life of the vehicle and the line. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings described herein are used to provide a further understanding of the embodiments of the present application, constitute a part of the present application, and do not constitute a limitation on the embodiments of the present invention.

[0043] Figure 1 is a three-dimensional diagram of the turnout box girder in the embodiment;

[0044] Figure 2 3 is a top view of the turnout box girder in the embodiment.

[0045] Figure 3 is a three-dimensional diagram of the box girder of the first turnout section in the embodiment;

[0046] Figure 4 is a structural schematic diagram of a steel mold of a first turnout segment box girder in an embodiment;

[0047] Figure 5 is a three-dimensional diagram of the top support of the first turnout segment box girder in the embodiment;

[0048] Figure 6 is a three-dimensional diagram of a turnout rail groove steel mold of the first turnout segment box girder in the embodiment;

[0049] Figure 7 It is a process flow chart for producing a turnout segment box girder in the embodiment. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

[0053] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0054] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0055] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] like Figure 1 As shown, the turnout box girder 100 in this embodiment has a pair of mainline rail grooves 101 and a pair of sideline rail grooves 102 formed inwardly, and the turnout box girder 100 gradually widens from the turnout tip to the turnout tail, and the two rail grooves gradually transition to four rail grooves.

[0057] The turnout box girder 100 is assembled from a plurality of turnout segment box girders. A post-tensioned prestressed channel 103 is reserved in each turnout segment box girder. The post-tensioned prestressed steel bar tendons are sequentially passed through the post-tensioned prestressed channels 103 of the plurality of segments, and grouting is poured into the post-tensioned prestressed channels 103 to assemble the plurality of segments longitudinally together, thereby forming the turnout box girder 100.

[0058] Each turnout segment box girder is manufactured separately and in one piece. In this embodiment, the turnout segment box girder steel mold is used and the in-situ casting method is adopted to produce the turnout segment box girder. The turnout segment box girder steel mold includes a bottom mold, a top mold and an end mold. The bottom mold includes a segment outer mold 21 and a segment core mold 22.

[0059] The top mold includes a top bracket 3 and a turnout rail groove steel mold 4. The top bracket 3 is adapted to the turnout segment box girder. The top bracket 3 mainly plays a supporting role. The turnout rail groove steel mold 4 is installed on the top bracket 3. The turnout rail groove steel mold 4 is adapted to the turnout rail groove of the turnout segment box girder bridge deck. The number of the turnout rail groove steel molds 4 is the same as the number of the turnout rail grooves of the corresponding turnout segment box girder and corresponds one to one.

[0060] In one possible design, Figure 5As shown, the top support 3 includes a bottom frame 31, at least two transverse portals 32 and a plurality of longitudinal portals 33. The bottom frame 31 is adapted to the turnout segment box beam, the transverse portal 32 includes a crossbeam and legs on both sides; and the longitudinal portal 33 includes a longitudinal beam and legs on both sides.

[0061] At least two transverse portals 32 are arranged longitudinally at intervals along the bottom frame 31, and the two side legs of the transverse portal 32 are fixedly connected to the two side frames of the bottom frame 31. The multiple transverse portals 32 are fixedly connected into a whole through the bottom frame 31, which is more convenient to use. It is worth noting that the shape and size of the bottom mold and the top mold match the corresponding turnout segment box girder.

[0062] The longitudinal portal frames 33 are arranged at intervals along the bottom frame 31, and the two side legs of the longitudinal portal frames 33 are fixedly connected to the other two side frames of the bottom frame 31. The multiple longitudinal portal frames 33 are fixedly connected as a whole through the bottom frame 31, which is more convenient to use. The number of longitudinal portal frames 33 is twice the number of turnout rail groove steel molds 4. Every two longitudinal portal frames 33 fix one turnout rail groove steel mold 4, and the turnout rail groove steel mold 4 is located between the two longitudinal portal frames 33. The two longitudinal portal frames 33 clamp the turnout rail groove steel mold 4 or the turnout rail groove steel mold 4 is bolted to the two longitudinal portal frames 33.

[0063] It is worth noting that the clamping surfaces of the two longitudinal gantries 33 match the corresponding side surfaces of the turnout rail groove steel mold 4.

[0064] It is worth noting that the number of the transverse portals 32 is set according to needs. There can be a transverse portal 32 at both ends and the middle of the bottom frame 31 respectively, and the longitudinal beam is connected to the cross beams of the three transverse portals 32.

[0065] In a possible design, the top support 3 includes a bottom frame 31, at least two transverse portals 32 and a plurality of longitudinal beams. The transverse portal 32 includes a cross beam and legs on both sides.

[0066] At least two transverse portals 32 are arranged longitudinally at intervals along the bottom frame 31, and the two side legs of the transverse portal 32 are fixedly connected to the two side frames of the bottom frame 31. The multiple transverse portals 32 are fixedly connected into a whole through the bottom frame 31, which is more convenient to use. It is worth noting that the shape and size of the bottom mold and the top mold match the corresponding turnout segment box girder.

[0067] The longitudinal beams are arranged at intervals along the bottom frame 31, and are fixed to the transverse portal frame 32. The number of longitudinal beams is twice the number of the turnout rail groove steel mold 4, and one turnout rail groove steel mold 4 is fixed to every two longitudinal beams, and the turnout rail groove steel mold 4 is located between the two longitudinal beams, and the two longitudinal beams clamp the turnout rail groove steel mold 4.

[0068] It is worth noting that the clamping surfaces of the two longitudinal beams match the corresponding side surfaces of the turnout rail groove steel mold 4 .

[0069] like Figure 7 As shown, the turnout segment box girder production process disclosed in this embodiment specifically includes the following steps:

[0070] S1, clearing the segment outer mold 21 of the turnout segment box girder;

[0071] S2, the steel bars of the turnout segment box girder are put into the segment outer formwork 21 and tied;

[0072] S3, the segment core mold 22 is hoisted in and adjusted into place;

[0073] S4, lifting and tying of steel bars at the top of the turnout segment box girder;

[0074] S5, the top formwork of the turnout segment box girder is hoisted in, and the turnout rail groove steel formwork 4 is aligned, adjusted and fixed with the rail groove reinforcement;

[0075] S6, passing the post-tensioned prestressed pipe 5 through the pipe, installing the end mold of the turnout segment box girder, and the end mold has a hole for the post-tensioned prestressed pipe 5 to pass through;

[0076] The post-tensioned prestressed pipe 5 is preferably a rubber hose.

[0077] S7, pouring concrete and plastering;

[0078] S8, tarpaulin steam temperature control health care;

[0079] S9, after the initial setting of the concrete, pull out the post-tensioned prestressed pipe 5;

[0080] S10, when the concrete strength reaches 85%, the top formwork, end formwork and core formwork 22 of the turnout segment box girder are removed, and after demoulding, they are hoisted to the beam storage yard for further watering and curing; after water curing, they are ready to be transported to the construction site. Each turnout segment box girder is manufactured according to the above steps.

[0081] In a possible design, the turnout box girder 100 is assembled from 7 turnout segments, and the 7 segments are: a first segment 11, a second segment 12, a third segment 13, a fourth segment 14, a fifth segment 15, a sixth segment 16, and a seventh segment 17.

[0082] like Figure 1-Figure 3 As shown, the first segment 11 is a double-groove segment; correspondingly, the top mold of the first segment 11 includes two turnout rail groove steel molds 4 and four longitudinal portal frames 33 or four longitudinal beams, such as Figure 4 As shown. In particular, there is a pit 112 on the first segment 11, and the pit 112 is located between the two turnout rail grooves. When in use, it is used to install the signal electric push-pull mechanism, and the upper cover is covered. The electric push-pull rod is connected to the point rail, and the point rail is shifted as needed, so that the train changes lanes. Correspondingly, the top mold of the first segment 11 has a pit steel film adapted to the pit 112, and the pit steel film is located between the two turnout rail groove steel molds 4.

[0083] The second section 12 is a double-groove-to-four-groove section; correspondingly, the top mold of the second section 12 includes two turnout rail groove steel molds 4 that transition from one groove to two grooves.

[0084] The third section 13 is a four-groove-to-three-groove section; correspondingly, the top mold of the third section 13 includes three turnout rail groove steel molds 4, and the turnout rail groove steel mold 4 at the middle position transitions from two grooves to one groove.

[0085] The fourth section 14 is a three-groove section; correspondingly, the top mold of the fourth section 14 includes three turnout rail groove steel molds 4 .

[0086] The fifth section 15 is a three-groove-to-four-groove section; correspondingly, the top mold of the fifth section 15 includes three turnout rail groove steel molds 4, and the turnout rail groove steel mold 4 in the middle position transitions from one groove to two grooves.

[0087] The sixth section 16 and the seventh section 17 are both four-groove sections; correspondingly, the top molds of the sixth section 16 and the seventh section 17 each include four turnout rail groove steel molds 4 .

[0088] In a possible design, the first segment 11 is a rectangle, and the second segment 12, the third segment 13, the fourth segment 14, the fifth segment 15, the sixth segment 16 and the seventh segment 17 gradually widen from one end to the other. In particular, the first segment 11 is a rectangle; the second segment 12, the third segment 13, the fourth segment 14, the fifth segment 15, the sixth segment 16 and the seventh segment 17 are all right-angled trapezoids, the upper base width of the next right-angled trapezoid segment is equal to the lower base width of the previous right-angled trapezoid segment, and the upper base width of the first right-angled trapezoid segment is equal to the width of the rectangular segment;

[0089] like Figure 2 As shown, when the first segment 11 to the seventh segment 17 are assembled in sequence, the long side of the first segment 11 and the right-angle waists of the remaining six segments are in a straight line, and the oblique waists of the second segment 12 to the seventh segment 17 are in a straight line.

[0090] In a possible design, the tail end face of the seventh segment 17 has a first beam end plane 104 and a second beam end plane 105 set at an angle, the main line rail groove 101 vertically penetrates the first beam end plane 104, and the side line rail groove 102 vertically penetrates the second beam end plane 105. Correspondingly, the end mold at one end of the seventh segment 17 has two first and second profiles set at an angle, and the first and second profiles are adapted to the first beam end plane 104 and the second beam end plane 105 respectively.

[0091] In a possible design, the first segment 11 is 5 m long, and the remaining six segments are 2.5 m long.

[0092] Optionally, since the first segment 11 is relatively long, for the convenience of transportation, the width of the first segment 11 is 3m, and the width of the first segment 11 is equal from one end to the other end; from one end of the second segment 12 to the other end of the seventh segment 17, the width gradually changes from 3m to 6m. In this way, the length of each segment is not long or wide, which can adapt to the transportation conditions of mountain rail transit. Correspondingly, the inner diameter length of the mold cavity of the outer mold is 2.5m-5m, and the inner diameter width is 3m-6m.

[0093] In a possible design, the width of the second segment 12 gradually changes from 3m to 3.5m, the width of the third segment 13 gradually changes from 3.5m to 4m, the width of the fourth segment 14 gradually changes from 4m to 4.5m, the width of the fifth segment 15 gradually changes from 4.5m to 5m, the width of the sixth segment 16 gradually changes from 5m to 5.5m, and the width of the seventh segment 17 gradually changes from 5.5m to 6m. Correspondingly, the shape and size of the steel mold of each segment match it, which will not be repeated here. Therefore, corresponding to the 7 segments, there are 7 different top molds, bottom molds and end molds.

[0094] This embodiment also discloses a method for manufacturing a turnout box beam 100, which specifically includes the following steps:

[0095] Step 1, manufacturing 7 turnout segment box girders respectively according to the above method;

[0096] Step 2: transport the seven turnout segment box girders to the construction site and assemble them in sequence;

[0097] Step 3, the post-tensioned prestressed steel bar tendons are sequentially passed through the post-tensioned prestressed ducts 103 of the seven turnout segment box girders;

[0098] Step 4, tensioning the prestressed steel tendons;

[0099] Step 5, grouting and anchoring the post-tensioning prestressed channel 103 to obtain the turnout box girder 100. Figure 2 As shown, the turnout box girder 100 gradually transitions from two rail grooves to four rail grooves from the turnout tip to the turnout tail.

[0100] The present application can produce turnout segment box girders, and the produced turnout segment box girders are not too wide or too long, and are easy to transport.

[0101] The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. The production process of turnout segment box beam is characterized by: The bridge deck of the turnout segment box girder has at least two inwardly concave turnout rail grooves, and a plurality of post-tensioning prestressed holes (103) for passing post-tensioning prestressed steel bar tendons are reserved in the turnout segment box girder; A turnout segment box girder is manufactured by using a turnout segment box girder steel mold and adopting a positive position method. The turnout segment box girder steel mold comprises a bottom mold, a top mold and an end mold. The bottom mold comprises a segment outer mold (21) and a segment core mold (22). The turnout segment box girder production process comprises the following steps: S1, clearing the segment outer mold (21) of the turnout segment box girder; S2, the steel bars of the turnout segment box girder are placed into the segment outer formwork (21) and tied; S3, the segment core mold (22) is hoisted in and adjusted into position; S4, lifting and tying of steel bars at the top of the turnout segment box girder; S5, the top formwork of the turnout segment box girder is hoisted in, and the turnout rail groove steel formwork (4) is aligned and fixed with the rail groove reinforcement; S6, threading the post-tensioned prestressed pipe (5) and installing the end form of the turnout segment box girder; S7, pouring concrete and plastering; S8, health preservation; S9, after the initial setting of the concrete, the post-tensioned prestressed pipe (5) is pulled out; S10, after the concrete strength reaches a certain level, the top formwork, end formwork and core formwork (22) of the turnout segment box girder are removed, and curing is continued after demoulding; The top mold comprises a top bracket (3) adapted to the turnout segment box beam and a turnout rail groove steel mold (4) adapted to the turnout rail groove, and the turnout rail groove steel mold (4) is mounted on the top bracket (3); The turnout box girder (100) has a pair of mainline steel rail grooves (101) and a pair of sideline steel rail grooves (102) formed inwardly, and the turnout box girder (100) gradually widens from the turnout tip to the turnout tail, and the two steel rail grooves gradually transition to four steel rail grooves; The turnout box girder (100) is assembled from seven turnout segment box girders, the turnout segment box girder steel molds are seven, and the seven turnout segment box girder steel molds are respectively adapted to the seven turnout segment box girders; The first segment (11) is a double-groove segment, and the top mold of the first segment (11) includes two turnout rail groove steel molds (4); The second section (12) is a double-groove-to-four-groove section, and the top mold of the second section (12) includes two turnout rail groove steel molds (4) that transition from one track to two tracks; The third section (13) is a section that changes from four grooves to three grooves. The top mold of the third section (13) includes three turnout rail groove steel molds (4). The turnout rail groove steel mold (4) at the middle position changes from two grooves to one groove. The fourth segment (14) is a three-groove segment, and the top mold of the fourth segment (14) includes three turnout rail groove steel molds (4); The fifth segment (15) is a segment transformed from three grooves to four grooves. The top mold of the fifth segment (15) includes three turnout rail groove steel molds (4). The turnout rail groove steel mold (4) at the middle position transitions from one groove to two grooves. The sixth segment (16) and the seventh segment (17) are both four-groove segments, and the top molds of the sixth segment (16) and the seventh segment (17) both include four turnout rail groove steel molds (4).

2. The turnout segment box girder production process according to claim 1, characterized in that: In the S8, the tarpaulin steam temperature control health maintenance is adopted; In the above S10, the concrete strength reaches 85% before demoulding. After demoulding, the turnout segment box girder is transported to the beam storage yard for further watering and curing. After the water curing is completed, it is ready for transportation.

3. The turnout segment box girder production process according to claim 1, characterized in that: The top bracket (3) has two structures: The first type, the top support (3) comprises a bottom frame (31), at least two transverse portals (32) and a plurality of longitudinal portals (33), the longitudinal portals (33) being adapted to the turnout rail groove steel mold (4); the transverse portal (32) comprising a crossbeam and legs on both sides, the at least two transverse portals (32) being arranged at intervals along the bottom frame (31) in the longitudinal direction, the legs on both sides of the crossbeam (32) being fixedly connected to the side frames of the bottom frame (31); the longitudinal portal (33) comprising a longitudinal beam and legs on both sides, the plurality of longitudinal portals (33) being arranged at intervals along the bottom frame (31) in the transverse direction, the legs on both sides of the longitudinal portals (33) being fixedly connected to the other side frames of the bottom frame (31); the longitudinal beam is connected to the crossbeams of the at least two transverse portals (32); the turnout rail groove steel mold (4) is fixed to the longitudinal portal (33); The second type, the top support (3) comprises a bottom frame (31), at least two transverse portals (32) and a plurality of longitudinal beams, the longitudinal beams being adapted to the turnout rail groove steel mold (4); the transverse portal (32) comprising a transverse beam and supporting legs on both sides, the at least two transverse portals (32) being arranged at intervals along the bottom frame (31) in the longitudinal direction, the supporting legs on both sides of the transverse portals (32) being fixedly connected to the side frames of the bottom frame (31); the plurality of longitudinal beams being arranged at intervals along the bottom frame (31) in the transverse direction, the longitudinal beams being connected to the transverse beams of the at least two transverse portals (32), and the turnout rail groove steel mold (4) being fixed to the longitudinal beams.

4. The process for producing a turnout segment box beam according to claim 3, characterized in that: The number of longitudinal portal frames (33) of the first top bracket (3) is twice the number of turnout rail groove steel molds (4), one turnout rail groove steel mold (4) is fixed to every two longitudinal portal frames (33), and the turnout rail groove steel mold (4) is located between the two longitudinal portal frames (33); The number of longitudinal beams of the second top bracket (3) is twice the number of the turnout rail groove steel molds (4), one turnout rail groove steel mold (4) is fixed to every two longitudinal beams, and the turnout rail groove steel mold (4) is located between the two longitudinal beams.

5. The process for producing a turnout segment box girder according to any one of claims 1 to 4, characterized in that: The top mold comprises three transverse door frames (32), and a transverse door frame (32) is respectively provided at both ends and in the middle of the bottom frame (31).

6. The turnout segment box girder production process according to claim 1, characterized in that: The first segment (11) is rectangular, and the second segment (12), the third segment (13), the fourth segment (14), the fifth segment (15), the sixth segment (16) and the seventh segment (17) gradually widen from one end to the other end; The first segment (11) is a rectangle, the second segment (12), the third segment (13), the fourth segment (14), the fifth segment (15), the sixth segment (16) and the seventh segment (17) are all right-angled trapezoids, the upper base width of the next right-angled trapezoid segment is equal to the lower base width of the previous right-angled trapezoid segment, and the upper base width of the first right-angled trapezoid segment is equal to the width of the rectangular segment; When the first segment (11) to the seventh segment (17) are assembled in sequence, the long side of the first segment (11) and the right-angle waists of the remaining six segments are in a straight line, and the oblique waists of the second segment (12) to the seventh segment (17) are in a straight line; The tail end face of the seventh segment (17) may or may not have a first beam end plane (104) and a second beam end plane (105) arranged at an angle, the mainline steel rail groove (101) vertically penetrates the first beam end plane (104), and the sideline steel rail groove (102) vertically penetrates the second beam end plane (105); When the tail end face of the seventh segment (17) has a first beam end plane (104) and a second beam end plane (105), the end mold at one end of the seventh segment (17) has two first and second profiles arranged at an angle, the first and second profiles respectively matching the first beam end plane (104) and the second beam end plane (105).

7. The process for producing a turnout segment box beam according to claim 1 or 6, characterized in that: The first segment (11) is 5m long and 3m wide, and the remaining 6 segments are all 2.5m long; The width of the second section (12) gradually changes from 3m to 3.5m, the width of the third section (13) gradually changes from 3.5m to 4m, the width of the fourth section (14) gradually changes from 4m to 4.5m, the width of the fifth section (15) gradually changes from 4.5m to 5m, the width of the sixth section (16) gradually changes from 5m to 5.5m, and the width of the seventh section (17) gradually changes from 5.5m to 6m.

8. A method for manufacturing a turnout box beam (100), characterized in that: The following steps are involved: Step 1, using the turnout segment box girder production process according to any one of claims 1 to 7 to respectively manufacture a plurality of turnout segment box girders; Step 2, assembling the plurality of turnout segment box girders; Step 3, the post-tensioned prestressed steel bar tendons are sequentially passed through the post-tensioned prestressed ducts (103) of the plurality of turnout segment box girders; Step 4, tensioning the prestressed steel tendons; Step 5, grouting and anchoring the post-tensioning prestressed channel (103) to obtain the turnout box girder (100).

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