A pouring mold for a ballastless track leveling layer and a ballastless track construction method
By designing a grouting mold suitable for ballastless tracks, the problem of leakage at the rounded corners of precast slabs was solved, achieving high-quality grouting and improved cost-effectiveness.
Patent Information
- Application Number
- CN202311483836.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-07
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2043-11-07
AI Technical Summary
Existing precast slabs are prone to leakage from the rounded corners during the grouting process, leading to problems such as substandard grouting quality and high production costs.
A casting mold is designed, including a base plate, a surrounding plate, and an insert plate. The surrounding plate fits the rounded corners of the precast plate and is provided with a discharge hole and connecting bolts. The insert plate can movably seal the discharge hole. The precast plate is fixed by the connecting bolts to ensure the stability and quality of the casting process.
This effectively prevents leakage at the rounded corners of the precast slabs, ensures the quality of the leveling layer grouting, and reduces production costs.
Smart Images
Figure CN117569131B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of ballastless track, and particularly relates to a pouring mold for a leveling layer of a ballastless track and a ballastless track construction method. BACKGROUND
[0002] With the continuous advancement of the process of railway high-speed, ballastless track is widely used in high-speed railway, urban rail transit and regional railway due to its high smoothness, stability and small maintenance workload. In recent years, the assembly type structure has been vigorously promoted due to its characteristics of saving construction period and being green and environmentally friendly. The assembly type ballastless track structure combines the advantages of ballastless track and assembly type structure, and is a hot topic in the field of rail transit. Due to relatively large construction error of the lower foundation, the prefabricated track slab is directly laid on the lower foundation, and the precision cannot meet the acceptance requirements. In order to ensure the construction precision of the track structure, it is necessary to pour concrete between the prefabricated track slab and the lower foundation, so as to form a leveling layer to smooth the construction error of the lower foundation. During pouring, a mold and a fixing device (supporting the prefabricated slab) are often used to ensure the stability during pouring.
[0003] However, in the prefabrication process of the existing prefabricated slab, the four corners of the prefabricated slab are usually poured as rounded corners in order to facilitate demolding and prevent the concrete at the four corners of the prefabricated slab from falling off, and the mold plate is usually a long strip structure, which causes the grout to easily leak from the rounded corners of the prefabricated slab during grouting. SUMMARY
[0004] In view of the above defects or improvement needs of the prior art, the present application provides a pouring mold for a leveling layer of a ballastless track and a ballastless track construction method, which can not only avoid leakage at the rounded corners of the prefabricated slab during grouting, but also ensure the pouring quality of the leveling layer during pouring, while reducing the production cost.
[0005] In a first aspect, the present application provides a pouring mold for a leveling layer of a ballastless track, which comprises a bottom plate, a surrounding plate and an insert plate.
[0006] The edge of the bottom plate has a notch, and the bottom plate is used to be installed on the lower foundation. The bottom edge of the surrounding plate is vertically connected to the side edge corresponding to the notch of the bottom plate. The inner contour of the surrounding plate is used to be fitted with the outer contour of each rounded corner of the prefabricated slab, so as to surround the prefabricated slab with a plurality of mold plates. The surrounding plate is provided with a discharge hole. The insert plate is movably arranged on the surrounding plate to seal the discharge hole. A plurality of spaced-apart connecting bolts are inserted on the surrounding plate, and each connecting bolt penetrates the surrounding plate to connect the surrounding plate and the prefabricated slab.
[0007] Optionally, the outer side of the insert plate is attached to the inner side of the surrounding plate, the inner side of the surrounding plate has a guide groove perpendicular to the bottom plate, the insert plate is movably inserted into the guide groove, and the inner contour of the insert plate is used to be attached to the outer contour of each fillet of the prefabricated plate.
[0008] Optionally, a plurality of pins are inserted into the surrounding plate and the insert plate, and each pin penetrates through the surrounding plate and the insert plate at the same time to connect the surrounding plate and the insert plate.
[0009] Optionally, a handle is arranged on the top of the insert plate, and the insert plate protrudes from the top of the surrounding plate.
[0010] Optionally, the pouring mold further comprises a plurality of rib plates, the plurality of rib plates are arranged at intervals, and each rib plate is connected to the bottom plate and the surrounding plate through two adjacent sides.
[0011] Optionally, the bottom plate has a plurality of strip-shaped holes extending towards the surrounding plate, and a corresponding fixing bolt for connecting the lower foundation is inserted into each strip-shaped hole.
[0012] Optionally, a positioning plate is arranged on the outer side of each end of the surrounding plate, and each positioning plate protrudes from the surrounding plate to sandwich the mold plate with the prefabricated plate.
[0013] In a second aspect, the present application provides a construction method for a ballastless track, which is based on the pouring mold for the leveling layer of a ballastless track according to the first aspect, and the construction method comprises the following steps:
[0014] According to the horizontal design position of the prefabricated plate, a plurality of bottom plates are fixed on the lower foundation;
[0015] According to the height design position of the prefabricated plate, the prefabricated plate is fixed on the surrounding plate through the connecting bolts on the plurality of surrounding plates, and each surrounding plate corresponds to each fillet of the prefabricated plate.
[0016] An insert plate is inserted between two adjacent surrounding plates, and each insert plate is fixed, so as to surround the grouting space between the prefabricated plate and the lower foundation;
[0017] Through the grouting hole on the prefabricated plate, concrete is poured into the grouting space, and at the same time, the gas in the grouting space and the dilute liquid in the concrete are discharged through the discharge hole;
[0018] The insert plate is arranged on each surrounding plate to seal the discharge hole, and the pouring of the concrete continues until the leveling layer is formed.
[0019] After the leveling layer reaches the design strength, the pouring mold and the mold plate are disassembled.
[0020] The above technical features can be combined with each other as long as they do not conflict with each other.
[0021] In general, the above technical solutions conceived by the present application have the following beneficial effects compared with the prior art:
[0022] For the pouring mold for the leveling layer of the ballastless track provided by the embodiment of the present application, since the bottom plate is used to be installed on the lower foundation, the bottom edge of the surrounding plate is vertically connected with the side edge of the notch of the bottom plate, and the inner contour of the surrounding plate is used to be fitted with the outer contour of each fillet of the prefabricated plate, so as to surround the prefabricated plate with the plurality of mold plates, thereby fixing and installing the plurality of pouring molds on the lower foundation through the plurality of bottom plates. At this time, each surrounding plate is fitted with the outer contour of each fillet of the prefabricated plate, avoiding the formation of leakage at each fillet of the prefabricated plate in the grouting process, thereby affecting the structural strength of the leveling layer.
[0023] Further, the surrounding plate is provided with a discharge hole, and the plug plate is movably arranged in the surrounding plate to seal the discharge hole, so that in the process of pouring concrete, the gas in the grouting space and part of the liquid in the concrete are discharged through the discharge hole, so that the concrete is uniformly filled in the grouting space, the pouring quality of the leveling layer is ensured, and the problem of pouring substandard leveling layer caused by the failure of discharging gas in the grouting space and the uneven solidification of concrete is avoided. In addition, the connecting bolt can support the prefabricated plate, avoiding the hoisting of the prefabricated plate during the pouring process, thereby reducing the production cost.
[0024] That is, the pouring mold for the leveling layer of the ballastless track provided by the embodiment of the present application not only can avoid the formation of leakage at each fillet of the prefabricated plate in the grouting process, but also can ensure the pouring quality of the leveling layer during the pouring process, while reducing the production cost. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 is a use schematic diagram of the pouring mold for the leveling layer of the ballastless track provided by the embodiment of the present application;
[0026] Figure 2 is a structure schematic diagram of the pouring mold for the leveling layer of the ballastless track provided by the embodiment of the present application;
[0027] Figure 3 is a top view of the bottom plate provided by the embodiment of the present application;
[0028] Figure 4 is an assembly schematic diagram of the surrounding plate provided by the embodiment of the present application;
[0029] Figure 5 is a structure schematic diagram of the plug plate provided by the embodiment of the present application;
[0030] Figure 6 is a partial sectional view of the fence provided by the embodiment of the present application;
[0031] Figure 7 is a flow chart of a ballastless track construction method provided by the embodiment of the present application.
[0032] In all the drawings, the same reference signs refer to the same technical features, in particular:
[0033] 1, bottom plate; 11, notch; 12, strip hole; 13, fixing bolt; 2, fence; 21, material discharging hole; 22, guide groove; 23, positioning plate; 3, plug-in plate; 31, handle; 4, plug; 5, rib plate; 100, pouring mold; 200, prefabricated plate; 300, lower foundation. DETAILED DESCRIPTION
[0034] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.
[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0036] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0037] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0038] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0039] Embodiment:
[0040] Figure 1 is a use schematic diagram of a pouring mold for a ballastless track leveling layer provided by an embodiment of the present application, Figure 2 is a structural schematic diagram of a pouring mold for a ballastless track leveling layer provided by an embodiment of the present application, in combination with Figure 1 and Figure 2 As shown in the figures, the pouring mold 100 comprises a bottom plate 1, a surrounding plate 2 and an insertion plate 3.
[0041] Figure 3 is a top view of the bottom plate provided by an embodiment of the present application, as Figure 3 As shown in the figure, the edge of the bottom plate 1 has a notch 11, and the bottom plate 1 is used to be mounted on the lower foundation 300. Figure 4 is an assembly schematic diagram of the surrounding plate provided by an embodiment of the present application, as Figure 4 As shown in the figure, the bottom edge of the surrounding plate 2 is vertically connected to the side edge of the notch 11 of the bottom plate 1, the inner contour of the surrounding plate 2 is used to fit the outer contour of each fillet of the prefabricated plate 200, so as to surround the prefabricated plate 200 with a plurality of mold plates, a plurality of discharge holes 21 are arranged on the surrounding plate 2, and the insertion plate 3 is movably arranged on the surrounding plate 2 to seal the discharge holes 21. A plurality of connecting bolts (not shown in the figure) are inserted and arranged on the surrounding plate 2, and each connecting bolt penetrates the surrounding plate 2 to connect the surrounding plate 2 and the prefabricated plate 200.
[0042] For the pouring mold for the ballastless track leveling layer provided by the embodiment of the application, since the bottom plate 1 is used for being mounted on the lower foundation 300, the bottom edge of the surrounding plate 2 is vertically connected with the side edge corresponding to the notch 11 of the bottom plate 1, and the inner contour of the surrounding plate 2 is used for being fitted with the outer contour of each fillet of the prefabricated plate 200, so as to surround the prefabricated plate 200 with the plurality of mold plates, thereby fixing and mounting the plurality of pouring molds 100 on the lower foundation 300 through the plurality of bottom plates 1. At this time, each surrounding plate 2 is fitted with the outer contour of each fillet of the prefabricated plate 200, thereby avoiding the leakage at each fillet of the prefabricated plate 200 in the grouting process, and affecting the structural strength of the leveling layer.
[0043] Further, the discharge hole 21 is arranged on the surrounding plate 2, and the plug plate 3 is movably arranged on the surrounding plate 2 to seal the discharge hole 21, so that the gas in the grouting space and part of the liquid in the concrete are discharged through the discharge hole 21 in the process of pouring the concrete, the concrete is uniformly filled in the grouting space, the pouring quality of the leveling layer is ensured, and the problems that the gas in the grouting space cannot be discharged and the concrete is not uniformly solidified to cause the pouring of the leveling layer to be substandard are avoided. In addition, the connecting bolt can support the prefabricated plate 200, thereby avoiding the hoisting of the prefabricated plate 200 in the pouring process, and the production cost is reduced.
[0044] That is, the pouring mold for the ballastless track leveling layer provided by the embodiment of the application not only can avoid the leakage at each fillet of the prefabricated plate 200 in the grouting process, but also can ensure the pouring quality of the leveling layer in the pouring process, and the production cost is reduced.
[0045] It is easy to understand that, since the edge of the bottom plate 1 has the notch 11, and the bottom edge of the surrounding plate 2 is vertically connected with the side edge corresponding to the notch 11 of the bottom plate 1, the leveling layer does not interfere with the disassembly of the bottom plate 1 in the process of pouring the leveling layer (the pouring mold 100 is always located outside the prefabricated plate 200 and the leveling layer), thereby the pouring mold 100 can be repeatedly used.
[0046] In addition, the concrete mainly includes particulate matter and liquid, the liquid flows to drive the particulate matter to flow and deposit. In the process of pouring the concrete, since the discharge hole 21 is in communication with the atmosphere, the liquid drives the particulate matter to fully flow, part of the liquid is discharged through the discharge hole 21 to drive the particulate matter to the surrounding plate 2 and deposit, and the air is discharged at the same time, the structural strength of the leveling layer at the edge of the surrounding plate 2 is ensured, and the problem that the liquid is gathered at the edge of the surrounding plate 2 and the content of the particulate matter is less (the particulate matter is not easy to flow to) to cause the leveling layer to be substandard is avoided.
[0047] It should be noted that the two side plates of the surrounding plate 2 extend to the plane side edges of the prefabricated plate 200, thereby cooperating with the mold plates to realize the surrounding of the entire prefabricated plate 200.
[0048] Combining Figure 3 and Figure 4 , the outer side of the insert plate 3 is attached to the inner side of the surrounding plate 2, the inner side of the surrounding plate 2 has a guide groove 22 perpendicular to the bottom plate 1, the insert plate 3 is movably inserted into the guide groove 22, and the inner contour of the insert plate 3 is used to be attached to the outer contour of each fillet of the prefabricated plate 200.
[0049] In the above embodiment, the attachment of the insert plate 3 and the surrounding plate 2 can increase the support strength of the surrounding plate 2 to the concrete in the pouring of the concrete. In addition, the guide groove 22 plays a guiding and positioning role in the insertion of the insert plate 3, which ensures the accurate sealing of the discharge hole 21.
[0050] It is easy to understand that after the insertion of the insert plate 3, the inner contour of the insert plate 3 and the inner contour of the outer edge (outside the insert plate 3) on the surrounding plate 2 form a shape that exactly matches the outer contour of each fillet of the prefabricated plate 200.
[0051] Further, a plurality of pins 4 are inserted into the surrounding plate 2 and the insert plate 3, and each pin 4 penetrates the surrounding plate 2 and the insert plate 3 at the same time to connect the surrounding plate 2 and the insert plate 3.
[0052] In the above embodiment, the pin 4 can conveniently realize the installation and disassembly of the insert plate 3 on the surrounding plate 2, avoiding the separation of the insert plate 3 from the surrounding plate 2.
[0053] Figure 5 is a structural schematic diagram of the insert plate provided by the embodiment of the present application, as Figure 5 shown, the top of the insert plate 3 is provided with a handle 31, and the insert plate 3 protrudes from the top of the surrounding plate 2.
[0054] In the above embodiment, the handle 31 is convenient for manual holding, so that the installation and disassembly of the insert plate 3 can be conveniently realized.
[0055] Exemplarily, the handle 31 is semicircular, which is welded to the insert plate 3.
[0056] In the present embodiment, the pouring mold 100 further comprises a plurality of rib plates 5, the plurality of rib plates 5 are arranged at intervals, and the two adjacent sides of each rib plate 5 are connected to the bottom plate 1 and the surrounding plate 2 respectively, so that the connection strength between the bottom plate 1 and the surrounding plate 2 can be increased through the plurality of rib plates 5.
[0057] Exemplarily, the number of rib plates 5 is 4, and each rib plate 5 is triangular.
[0058] In one implementation manner of the present application, the bottom plate 1 has a plurality of strip-shaped holes 12 extending towards the surrounding plate 2, and a corresponding fixing bolt 13 for connecting the lower foundation 300 is inserted into each strip-shaped hole 12.
[0059] It is easy to understand that when the fixing bolt 13 is not tightened, the bottom plate 1 can be conveniently slid through the strip-shaped hole 12, thereby increasing the adjusting range of the bottom plate 1 and avoiding assembly errors.
[0060] Figure 6 is a partial sectional view of the surrounding plate provided by the embodiment of the present application, as Figure 6 As shown in the figure, the outer side of each end of the surrounding plate 2 is provided with a positioning plate 23, and each positioning plate 23 protrudes from the surrounding plate 2 and is arranged to sandwich the mold plate with the prefabricated plate 200.
[0061] In the above embodiment, after the bottom plate 1 is fixed on the lower foundation 300, the installation of the surrounding plate 2 and the positioning plate 23 can be realized. On this basis, after the prefabricated plate 200 is installed, the mold plate can be conveniently inserted and installed between the positioning plate 23 and the prefabricated plate 200, thereby realizing the convenient installation of the mold plate and avoiding the use of other fixing devices to fix the mold plate.
[0062] Exemplarily, the positioning plate 23 and the surrounding plate 2 are welded.
[0063] Figure 7 is a flow chart of a ballastless track construction method provided by the embodiment of the present application, as Figure 7 As shown in the figure, the construction method is based on the pouring mold for the leveling layer of the ballastless track described above, and the construction method comprises:
[0064] S101, according to the horizontal design position of the prefabricated plate 200, a plurality of bottom plates 1 are fixed on the lower foundation 300.
[0065] S102, according to the height design position of the prefabricated plate 200, the prefabricated plate 200 is fixed on the surrounding plate 2 through the connecting bolts on the plurality of surrounding plates 2, and each surrounding plate 2 corresponds to each fillet of the prefabricated plate 200.
[0066] S103, the mold plate is inserted between the adjacent two surrounding plates 2, and each mold plate is fixed, thereby surrounding the grouting space between the prefabricated plate 200 and the lower foundation 300.
[0067] S104, the grouting space is poured with concrete through the grouting hole on the prefabricated plate 200, and the gas in the grouting space and the dilute liquid in the concrete are discharged through the discharge hole 21.
[0068] S105, the plug plate 3 is arranged on each surrounding plate 2 to seal the discharge hole 21, and the pouring of the concrete is continued until the leveling layer is formed.
[0069] S106, after the leveling layer reaches the design strength, the pouring mold 100 and the mold plate are disassembled.
[0070] It should be noted that the concrete flow can be directly observed through the discharge hole 21 during the concrete pouring process. During the concrete solidification process, the concrete solidification can also be observed through the discharge hole 21 (the insert plate 3 can be removed at this time).
[0071] Those skilled in the art can understand that the above description is only the preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. A pouring mold for a ballastless track leveling layer, characterized in that, The perfusion mold (100) comprises a bottom plate (1), a surrounding plate (2) and an insert plate (3); The edge of the bottom plate (1) has a notch (11), the bottom plate (1) is used for being mounted on a lower base (300), the bottom edge of the surrounding plate (2) is vertically connected with the side edge corresponding to the notch (11) of the bottom plate (1), the inner contour of the surrounding plate (2) is used for being fitted with the outer contour of each fillet of a prefabricated plate (200) to surround the prefabricated plate (200) with a plurality of mold plates, the surrounding plate (2) is provided with a discharging hole (21), the insert plate (3) is movably arranged on the surrounding plate (2) to seal the discharging hole (21), a plurality of spaced-apart connecting bolts are inserted and mounted on the surrounding plate (2), and each connecting bolt penetrates the surrounding plate (2) to connect the surrounding plate (2) and the prefabricated plate (200); According to the height design position of the prefabricated plate (200), the prefabricated plate (200) is fixed on the surrounding plate (2) through the connecting bolts on a plurality of surrounding plates (2), and each surrounding plate (2) corresponds to surround each fillet of the prefabricated plate (200).
2. The pouring mold for a ballastless track leveling layer according to claim 1, characterized in that, The outer side of the insert plate (3) is fitted with the inner side of the surrounding plate (2), the inner side of the surrounding plate (2) has a guide groove (22) perpendicular to the bottom plate (1), the insert plate (3) is movably inserted and mounted in the guide groove (22), and the inner contour of the insert plate (3) is used for being fitted with the outer contour of each fillet of the prefabricated plate (200).
3. The pouring mold for a ballastless track leveling layer according to claim 2, characterized in that, A plurality of latches (4) are inserted and mounted on the surrounding plate (2) and the insert plate (3), each latch (4) penetrates the surrounding plate (2) and the insert plate (3) at the same time to connect the surrounding plate (2) and the insert plate (3).
4. The pouring mold for a ballastless track leveling layer according to claim 1, characterized in that, The top of the insert plate (3) is provided with a handle (31), and the insert plate (3) protrudes from the top of the surrounding plate (2).
5. The pouring mold for the ballastless track leveling layer according to any one of claims 1-4, characterized in that, The perfusion mold (100) further comprises a plurality of rib plates (5), the plurality of rib plates (5) are spaced apart, and each rib plate (5) is connected with the bottom plate (1) and the surrounding plate (2) respectively at two adjacent sides.
6. A pouring mold for a ballastless track leveling layer according to any one of claims 1 to 4, characterized in that, The bottom plate (1) has a plurality of strip-shaped holes (12) extending towards the surrounding plate (2), and a corresponding fixing bolt (13) for connecting the lower base (300) is inserted and mounted on each strip-shaped hole (12).
7. A pouring mold for a ballastless track leveling layer according to any one of claims 1 to 4, characterized in that, The outer sides of both ends of the surrounding plate (2) are provided with positioning plates (23), and each positioning plate (23) protrudes from the surrounding plate (2) to sandwich the mold plate with the prefabricated plate (200).
8. A method of constructing a ballastless track, characterized by, The construction method is based on the perfusion mold for the leveling layer of the ballastless track according to any one of claims 1-7, and the construction method comprises: According to the horizontal design position of the prefabricated plate (200), a plurality of bottom plates (1) are fixed on the lower base (300); According to the height design position of the prefabricated plate (200), the prefabricated plate (200) is fixed on the surrounding plate (2) through the connecting bolts on a plurality of surrounding plates (2), and each surrounding plate (2) corresponds to surround each fillet of the prefabricated plate (200). A mold plate is inserted between two adjacent said fence plates (2), and each mold plate is fixed, thereby enclosing a grouting space between said precast plate (200) and said lower foundation (300); Through the grouting hole on said precast plate (200), concrete is grouted into said grouting space, and the gas and the dilute liquid in the concrete in said grouting space are discharged through said discharge hole (21); The insert plate (3) is arranged on each said fence plate (2) to seal said discharge hole (21), and the grouting of concrete is continued until a leveling layer is formed; After the leveling layer reaches the design strength, each said grouting mold (100) and each said mold plate are disassembled.
Citation Information
Patent Citations
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