A casting device and casting method for sleeper type support block

Abstract

The present invention relates to a casting device and method for a sleeper type support block, the device comprises a first mold frame, a second mold frame and a rectangular casting template, the first mold frame and the second mold frame are both provided with a slide groove, the first mold frame and the second mold frame are fixedly connected by a fixed connection piece slidably mounted on the slide groove, and a rectangular frame is formed, the casting template is arranged inside the rectangular frame to form a casting space, the casting template is fixedly connected to the first mold frame or the second mold frame by a fixed connection piece slidably mounted on the slide groove, the edge of the casting template is provided with a frame perpendicular to the casting template, all sides of the casting space have the same height, and each side is provided with one or more layers of casting templates. Compared with the prior art, the present invention has the advantages of simple operation, good flexibility and reusability.

Description

Technical Field

[0001] The invention relates to the field of subway construction, and in particular to a casting device and a casting method for a sleeper type supporting block. Background Art

[0002] In the maintenance of urban rail transit lines, turnouts, as weak track equipment, have always been the top priority in track equipment maintenance. Turnout support blocks, as the structural foundation of turnouts, affect the structural state of the entire set of turnouts. At present, turnout support blocks often adopt the form of sleeper-type cast-in-place support blocks. Due to the tight construction period and difficult construction process, a large number of support blocks at the switch position are skewed, resulting in turnouts being skewed, with the inside higher and the outside lower, and uneven resistance to the movement of the point rail, inducing turnout failures. The overall structure of the subway tunnel sinks, causing the roadbed to sink, the support blocks to separate from the roadbed, and some elastic short sleepers to be pulled out, resulting in the phenomenon of "empty suspension"; the settlement of the turnout support blocks and The skewness and empty suspension of rails on the track line will affect the normal operation of the subway. Previously, the slide bed wedge-shaped rubber pads were used to temporarily adjust the inner and outer elevations of the slide bed, but the structural disease could not be completely cured. The equipment safety redundancy was insufficient, so the sleeper-type support blocks needed to be modified, the original support blocks needed to be chiseled out and re-cast. This process required the erection of a casting mold, the need to saw off wooden formwork and wooden keels on site, and temporary fixing, installation and casting. The installation process was complicated, the casting mold had low precision, and gaps were prone to occur, resulting in leakage of casting materials. The casting mold was discarded after use and could not be reused, resulting in waste. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a casting device and method for a sleeper type support block, which is simple to operate, flexible and reusable.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] 14. The pouring device of claim 13, wherein the arcuate depression is a vertical rim and the arc deflected depression is a vertical rim, the arc deflecting depression being a vertical rim and the arc deflecting depression being a horizontal rim. The arc deflecting depression is a vertical rim and the arc deflecting depression is a vertical rim. The arc deflecting depression is a vertical rim and the arc deflecting depression is a vertical rim.

[0006] Furthermore, an L-shaped connecting plate is provided between two adjacent casting templates located at the top layer of the casting space, and sockets are provided at both ends of the connecting plate. The sockets at both ends of the connecting plate are respectively mounted on the first pins on the two adjacent casting templates, thereby ensuring the connection strength between the two casting templates on the highest layer and improving the sealing of the casting space.

[0007] Furthermore, a base is provided below the casting formwork at the bottom layer of the casting space, and the base includes a positioning plate, on which a second pin corresponding to the positioning hole on the casting formwork is provided. The second pin is inserted into the positioning hole to further improve the stability of the casting formwork on the four sides of the casting space.

[0008] Furthermore, a mounting plate is vertically provided between the frames on the upper and lower sides of the casting template, a connecting hole is opened on the mounting plate, and the fixed connecting member is fixedly connected to the mounting plate through the connecting hole.

[0009] Furthermore, the cross-section of the mounting plate is L-shaped, and a gap is formed between the mounting plate and the casting template, which is convenient for workers to operate. The connecting hole is a waist-shaped expansion hole along the vertical direction, which can accommodate installation errors and facilitate installation.

[0010] Furthermore, the fixed connection member comprises an L-shaped connection block, a fixing bolt and a clamping block, the width of the cross-sectional notch of the slide slot is smaller than the maximum width of the clamping block in a direction perpendicular to the slide slot, the clamping block is placed in the slide slot, the fixing bolt passes through the connection block and the notch of the slide slot in sequence and is threadedly connected with the clamping block, and the clamping block is tightly attached to the inner wall of the slide slot by twisting the fixing bolt, so that the connection block is fixedly connected to the first mold frame or the second mold frame;

[0011] The width of the waist-shaped expansion hole is also smaller than the maximum width of the clamping block in a direction perpendicular to the slide slot. The clamping block is tightly attached to the mounting plate by twisting the fixing bolts, so that the connecting block is fixedly connected to the mounting plate.

[0012] A method for casting a sleeper type support block using the above casting device is specifically as follows:

[0013] Dig a foundation pit on the ballast surface, sprinkle water while digging to reduce dust, use a chisel to roughen the bottom of the foundation pit, clean the floating ballast with water, and set up a steel cage;

[0014] Install the first formwork, the second formwork and the pouring formwork around the foundation pit, respectively adjust the size of the rectangular frame and the height of the pouring space by selecting the pouring formwork of appropriate length and the vertical splicing pouring formwork to adapt to the size of the required support block, and lay a layer of lime at the bottom of the pouring space to prevent mortar leakage;

[0015] Set up the slide bed and adjust the height difference on both sides of the slide bed to within 2mm;

[0016] Pour the special mortar into the formwork, and remove the first formwork, the second formwork and the pouring formwork after the special mortar solidifies.

[0017] Furthermore, when the existing support blocks are chiseled out and re-cast, the rails are raised by a rack-type track jack, the raised rails are supported by a temporary support frame, the slide plate on the support block to be chiseled out is removed, the support block is chiseled out to below the track bed surface to form a foundation pit, and at the same time the steel cage in the support block is retained, steel bars are implanted on the steel cage along the height direction of the support block, the casting space is rebuilt, the slide plate is hung on the bottom of the base rail and the point rail, anchor bolts are installed on the slide plate, embedded sleeves are installed at the ends of the anchor bolts, and the temporary support frame, the first formwork, the second formwork and the casting formwork are removed after the special mortar has solidified, so that the support block can be partially modified without affecting the track operation.

[0018] Furthermore, the process of adjusting the height difference between the two sides of the slide bed is specifically as follows:

[0019] Use a level to level the slide. If the end of the slide toward the outside of the track is too high, hit the other end of the slide with a hammer. If the end of the slide toward the inside of the track is too low, tie one end of the wire to the anchor bolt screwed into the slide, and fix the other end of the wire to the spring bar at the end of the slide toward the outside of the track.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The present invention provides a slide groove on the first mold frame and the second mold frame, and the first mold frame and the second mold frame are fixedly connected by a fixed connection piece slidably installed on the slide groove, and enclose a rectangular frame, and the casting template is arranged inside the rectangular frame to form a casting space, and the casting template is fixedly connected to the first mold frame or the second mold frame by a fixed connection piece slidably installed on the slide groove, which is convenient for disassembly and installation and can be reused. The edge of the casting template is provided with a frame perpendicular to the casting template, and a plurality of first latches are arranged on the frame on the top side edge at intervals, and positioning holes are arranged at corresponding positions of the bottom side edge, and the bottom surface size of the casting space can be flexibly adjusted, and the height of the casting space can be adjusted by superimposing the casting templates, which has good flexibility;

[0022] (2) The present invention provides an L-shaped connecting plate between two adjacent casting templates located at the uppermost layer of the casting space, thereby ensuring the connection strength between the two casting templates at the uppermost layer, preventing the casting templates from shifting sideways, and improving the sealing and stability of the casting space;

[0023] (3) The present invention provides a base below the casting template at the bottom layer of the casting space, the base includes a positioning plate, the positioning plate is provided with a second latch corresponding to the positioning hole on the casting template, the second latch is inserted into the positioning hole, and the stability of the casting template on the four sides of the casting space is further improved;

[0024] (4) The present invention vertically provides a mounting plate between the frames on the upper and lower sides of the casting template, and a connecting hole is opened on the mounting plate. The fixed connecting member is fixedly connected to the mounting plate through the connecting hole. The mounting plate plays a fixing role and also plays a role of a reinforcing rib, thereby improving the strength of the casting template. The connecting hole is a waist-shaped expansion hole along the vertical direction, which can accommodate installation errors and facilitate installation;

[0025] (5) The present invention raises the rails when remodeling the existing support blocks and recasting them, chiseling out several of the support blocks and performing partial reconstruction. There is no need to remove the rails, which does not affect the track operation and is highly efficient.

[0026] (6) The present invention lays a layer of lime at the bottom of the pouring space to prevent mortar from leaking from the bottom of the pouring space during pouring, and has good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the casting formwork;

[0029] Figure 3 is a schematic diagram of the structure of the base;

[0030] Figure 4 It is a structural schematic diagram of the mounting plate;

[0031] Figure 5 is a structural schematic diagram of the connecting plate;

[0032] Figure 6 A schematic diagram of the installation position of the fixed connection piece;

[0033] Description of the numbers in the figure:

[0034] 1. First formwork, 2. Second formwork, 3. Casting formwork, 4. Fixed connector, 5. Connecting plate, 6. Base, 7. Slide, 31. Frame, 32. First latch, 33. Connecting hole, 34. Mounting plate, 35. Positioning hole, 41. Connecting block, 42. Fixing bolt, 43. Clamping block, 44. Spring washer, 45. Gasket, 51. Socket, 61. Positioning plate, 62. Second latch. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0036] Example 1

[0037] A casting device for a sleeper type support block, such as Figure 1 , including a first mold frame 1, a second mold frame 2 and a rectangular casting template 3, the first mold frame 1 and the second mold frame 2 are both provided with a slide groove 7, the first mold frame 1 and the second mold frame 2 are fixedly connected by a fixed connecting piece 4 slidably installed on the slide groove 7, and form a rectangular frame, the casting template 3 is arranged on the inner side of the rectangular frame to constitute a casting space, the casting template 3 is fixedly connected to the first mold frame 1 or the second mold frame 2 by a fixed connecting piece 4 slidably installed on the slide groove 7, the edge of the casting template 3 is provided with a frame 31 perpendicular to the casting template 3, wherein a plurality of first latches 32 are arranged on the frame 31 on the top side edge at intervals, and a positioning hole 35 is arranged at the corresponding position of the bottom side edge, all sides of the casting space have the same height, each side is provided with one or more layers of casting templates 3, when multiple layers of casting templates 3 are arranged on each side, the multiple layers of casting templates 3 are connected in sequence from bottom to top, and the two adjacent casting templates 3 above and below are connected by the first latch 32 and the positioning hole 35.

[0038] like Figure 1 and Figure 5 An L-shaped connecting plate 5 is provided between two adjacent casting templates 3 located at the top layer of the casting space, and sockets 51 are provided at both ends of the connecting plate 5. The sockets at both ends of the connecting plate 5 are respectively sleeved on the first pins 32 on the two adjacent casting templates 3 to ensure the stability of the connection of the topmost casting template 3.

[0039] like Figure 1 and Figure 3 A base 6 is provided below the casting template 3 at the bottom layer of the casting space. The base 6 includes a positioning plate 61 . A second latch 62 corresponding to the positioning hole 35 on the casting template 3 is provided on the positioning plate 61 . The second latch 62 is inserted into the positioning hole 35 .

[0040] like Figure 2 and Figure 4 A mounting plate 34 is vertically provided between the frames 31 on the upper and lower sides of the casting template 3. A connecting hole 33 is opened on the mounting plate 34. The fixed connecting member 4 is fixedly connected to the mounting plate 34 through the connecting hole 33. The cross-section of the mounting plate 34 is L-shaped. The space between the mounting plate 34 and the casting template 3 is convenient for the staff to operate, and at the same time can increase the structural strength of the casting template 3. The connecting hole 33 is a waist-shaped expansion hole along the vertical direction, which can accommodate installation errors.

[0041] like Figure 6 The fixed connecting member 4 includes an L-shaped connecting block 41, a fixing bolt 42 and a clamping block 43. The width of the cross-sectional notch of the slide slot 7 is smaller than the maximum width of the clamping block 43 along the direction perpendicular to the slide slot 7. The clamping block 43 is placed in the slide slot 7. The fixing bolt 42 passes through the connecting block 41 and the notch of the slide slot 7 in turn and is threadedly connected with the clamping block 43. The clamping block 43 is tightly against the inner wall of the slide slot 7 by twisting the fixing bolt, so that the connecting block 41 is fixedly connected to the first mold frame 1 or the second mold frame 2; the width of the waist-shaped expansion hole is also smaller than the maximum width of the clamping block 43 along the direction perpendicular to the slide slot 7. The fixing bolt 42 passes through the connecting block 41 and the waist-shaped expansion hole in turn and is threadedly connected with the clamping block 43. The clamping block 43 is tightly against the mounting plate 34 by twisting the fixing bolt, so that the connecting block 41 is fixedly connected to the mounting plate 34. A spring washer 44 and a gasket 45 are provided between the fixing bolt 42 and the connecting block 41.

[0042] Example 2

[0043] A casting method of a sleeper type support block using a casting device corresponding to Example 1 is used to transform a railway track with a skewed or sunken support block, specifically comprising:

[0044] Loosen the anchor bolts on the slide bed, lift the rails with a rack-type track jack, support the lifted rails with a temporary support frame, and remove the two adjacent slide bed plates on the support block to be removed;

[0045] Chisel out the support blocks, sprinkle water while chiseling to reduce dust, chisel to 100-150mm below the ballast surface to form a foundation pit, chisel the bottom of the foundation pit, and wash the floating ballast with water. The original steel cage in the ballast is retained, and steel bars are longitudinally implanted in the chiseled parts to increase the longitudinal tensile strength after pouring;

[0046] The first formwork 1, the second formwork 2 and the casting formwork 3 are installed around the foundation pit. The size of the rectangular frame and the height of the casting space are adjusted by selecting the casting formwork 3 of appropriate length and the vertical splicing casting formwork 3 to adapt to the size of the required support block. A layer of lime is laid at the bottom of the casting space to prevent mortar leakage.

[0047] The rack-type track lifter lifts the rails, reinstalls the slide plate, hangs the slide plate at the bottom of the base rail and the point rail, screws the anchor bolts into the slide plate, and screws the embedded sleeves into the ends of the anchor bolts. Adjust the height difference on both sides of the slide plate to within 2mm, and use a level to level it. If the outer side of the slide plate is too high, hit the inner side of the slide plate with a hammer. If the inner side of the slide plate is too low, tie one end of the wire to the anchor bolt on the slide plate, and fix the other end of the wire to the spring bar on the outer side of the slide plate.

[0048] Pour special mortar into the formwork until the surface of the special mortar contacts the slide bed. The special mortar is Kashide 230H. The surface of the special mortar exposed to the air should be shrunk. After the special mortar solidifies, remove the temporary support frame, the first formwork 1, the second formwork 2 and the casting formwork 3.

[0049] This embodiment breaks through the restrictive condition that the support block regulation affects the normal operation of the turnout and has high efficiency.

[0050] Embodiment 1 and embodiment 2 propose a casting device and method for a sleeper type support block, wherein a casting space is enclosed by a first mold frame 1, a second mold frame 2 and a casting template 3, which is convenient for disassembly and installation, and the bottom surface size of the casting space can be flexibly adjusted. The height of the casting space can be adjusted by superimposing casting templates, and the flexibility is good. The casting device can be used to perform partial modification on the existing support block without affecting rail traffic, and the efficiency is high, and the problems of skewness and settlement of the support block can be completely solved.

[0051] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A casting device for a sleeper type support block, characterized in that: The invention comprises a first mold frame (1), a second mold frame (2) and a rectangular casting template (3), wherein the first mold frame (1) and the second mold frame (2) are both provided with a slide groove (7), the first mold frame (1) and the second mold frame (2) are fixedly connected by a fixed connection piece (4) slidably mounted on the slide groove (7), and form a rectangular frame, the casting template (3) is arranged inside the rectangular frame to form a casting space, and the casting template (3) is connected to the first mold frame (1) or the second mold frame (2) by a fixed connection piece (4) slidably mounted on the slide groove (7). 2) fixed connection, the edge of the casting template (3) is provided with a frame (31) perpendicular to the casting template (3), wherein a plurality of first latches (32) are arranged at intervals on the frame (31) on the top edge, and positioning holes (35) are arranged at corresponding positions on the bottom edge, all sides of the casting space are of the same height, and each side is provided with one or more layers of casting templates (3), the multiple layers of casting templates (3) are connected in sequence from bottom to top, and two adjacent casting templates (3) are connected via the first latches (32) and the positioning holes (35); The fixed connection member (4) comprises an L-shaped connection block (41), a fixing bolt (42) and a clamping block (43) which are connected in sequence, the width of the cross-sectional notch of the slide groove (7) is smaller than the maximum width of the clamping block (43) in a direction perpendicular to the slide groove (7), the clamping block (43) is placed in the slide groove (7), and the fixing bolt (42) is threadedly connected to the clamping block (43); A mounting plate (34) having an L-shaped cross section is vertically provided between the frames (31) on the upper and lower sides of the casting template (3), a connecting hole (33) is provided on the mounting plate (34), and the fixed connecting member (4) is fixedly connected to the mounting plate (34) via the connecting hole (33), and the connecting hole (33) is a waist-shaped expansion hole along the vertical direction.

2. A casting device for a sleeper type support block according to claim 1, characterized in that: It also includes an L-shaped connecting plate (5), with plug holes (51) at both ends of the connecting plate (5), and the plug holes at both ends of the connecting plate (5) are respectively sleeved on first latches (32) on two adjacent casting templates (3) located at the uppermost layer of the casting space.

3. A casting device for a sleeper type support block according to claim 1, characterized in that: The invention also comprises a base (6), wherein the base (6) comprises a positioning plate (61), wherein the positioning plate (61) is provided with a second latch (62) corresponding to the positioning hole (35) on the casting template (3), and wherein the second latch (62) is inserted into the positioning hole (35) of the casting template (3) at the bottom layer of the casting space.

4. A method for casting a sleeper type support block using the casting device according to claim 1, characterized in that: Specifically: Dig a foundation pit on the ballast surface, roughen the bottom of the foundation pit with a chisel, clean the floating ballast with water, and set up a steel cage; Installing a first formwork (1), a second formwork (2) and a casting template (3) around the foundation pit, and adjusting the size of the rectangular frame and the height of the casting space by selecting a casting template (3) of appropriate length and vertically splicing the casting template (3) to adapt to the size of the required support block; Set up the slide bed and adjust the height difference on both sides of the slide bed to within the set range; The special mortar is poured into the pouring space, and after the special mortar solidifies, the first formwork (1), the second formwork (2) and the pouring template (3) are removed.

5. A method for casting a sleeper type support block according to claim 4, characterized in that: The process of adjusting the height difference between the two sides of the slide bed is specifically as follows: Use a level to level the slide. If the end of the slide toward the outside of the track is too high, hit the other end of the slide with a hammer. If the end of the slide toward the inside of the track is too low, tie one end of the wire to the anchor bolt screwed into the slide, and fix the other end of the wire to the spring bar at the end of the slide toward the outside of the track.

6. A method for casting a sleeper type support block according to claim 4, characterized in that: Spread a layer of lime at the bottom of the pouring space.

7. A method for casting a sleeper type support block using the casting device according to claim 1, characterized in that: Specifically: Loosen the anchor bolts on the slide bed, lift the rails with a rack-type track jack, support the lifted rails with a temporary support frame, and remove the two adjacent slide bed plates on the support block to be removed; Chisel out the support blocks, sprinkle water while chiseling to reduce dust, chisel to 100-150mm below the ballast surface to form a foundation pit, chisel the bottom of the foundation pit, and wash the floating ballast with water. The original steel cage in the ballast is retained, and steel bars are longitudinally implanted in the chiseled parts to increase the longitudinal tensile strength after pouring; A first formwork (1), a second formwork (2) and a casting formwork (3) are installed around the foundation pit, and the size of the rectangular frame and the height of the casting space are adjusted accordingly by selecting a casting formwork (3) of appropriate length and vertically splicing the casting formwork (3) to adapt to the size of the required support block, and a layer of lime is laid at the bottom of the casting space to prevent mortar leakage; The rack-type track lifter lifts the rails, reinstalls the slide plate, hangs the slide plate at the bottom of the base rail and the point rail, screws the anchor bolts into the slide plate, and screws the embedded sleeves into the ends of the anchor bolts. Adjust the height difference on both sides of the slide plate to within 2mm, and use a level to level it. If the outer side of the slide plate is too high, hit the inner side of the slide plate with a hammer. If the inner side of the slide plate is too low, tie one end of the wire to the anchor bolt on the slide plate, and fix the other end of the wire to the spring bar on the outer side of the slide plate. Pour special mortar into the formwork until the surface of the special mortar contacts the slide plate. The special mortar is Kashide 230H. The surface of the special mortar exposed to the air should be shrunk. After the special mortar solidifies, remove the temporary support frame, the first formwork (1), the second formwork (2) and the casting formwork (3).

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