A longitudinal reinforcement impervious core wall based on a dam and its construction method

Abstract

The present invention belongs to the technical field of dam construction engineering, and specifically relates to a longitudinal reinforcement anti-seepage core wall based on a dam and its construction method, including a load-bearing mechanism, a support mechanism, a support structure, a connection mechanism, a grouting mechanism, and an alignment mechanism; a load-bearing structure is poured on the top of the connection mechanism to install a drainage outlet, and the load-bearing mechanism with a hollow interior reduces the weight of the overall structure during handling, facilitating handling, reducing the area of in-situ casting, and improving the construction speed. The alignment mechanism is slidably connected inside the load-bearing mechanism, facilitating the installation of two units. The grouting mechanism moves along with the adjustment of the alignment mechanism, facilitating adjustment, and after grouting, the alignment mechanism is fixed.

Description

Technical Field

[0001] The present invention belongs to the technical field of dam construction engineering, and particularly relates to a longitudinal reinforcement anti-seepage core wall based on a dam and a construction method thereof. Background Art

[0002] Since asphalt concrete is a flexible material and the construction technology requirements of the asphalt concrete core wall are high, the core wall rises synchronously with the dam shell material. Therefore, the core wall construction has many layers, and the interlayer treatment is not easy to control, and risk points such as leakage, deformation and cracking, and hydraulic fracturing are likely to occur. Once water leaks, it is very difficult to handle.

[0003] However, during the installation and pouring process of the longitudinal reinforcement anti-seepage core wall of the current dam, due to site restrictions, the steel bars are easily bent, making the positions between the connected walls not corresponding to the steel bars of another wall, and it is difficult to install. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides a longitudinal reinforcement anti-seepage core wall based on a dam and a construction method thereof.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a longitudinal reinforcement anti-seepage core wall based on a dam, including a load-bearing mechanism, a support mechanism, a support structure, a connection mechanism, a grouting mechanism and a positioning mechanism; the outside of the support mechanism for realizing the manufacture of the overall structure and the installation of concrete solidification is wrapped with a connection mechanism, and two groups of support mechanisms for supporting the overall mechanism during installation are installed on the side of the connection mechanism. The top of the solid connection mechanism inside is poured with a load-bearing mechanism in the shape of a cuboid structure, hollow inside and open at the top. A positioning mechanism for realizing the connection of two overall structures is slidably connected inside the load-bearing mechanism, and a grouting mechanism for facilitating grouting is slidably connected inside the positioning mechanism.

[0006] Specifically, the support mechanism includes steel wires, first steel bars, second steel bars, third steel bars and grouting holes. The first steel bars are vertically woven at equal intervals at the bottom of the load-bearing mechanism. Among the several second steel bars on the side wall of the load-bearing mechanism, the second steel bars are fixedly connected at equal intervals and vertically by steel wires. On the side of the load-bearing mechanism, the third steel bars are fixedly connected at equal intervals and vertically by steel wires. The first steel bars, the second steel bars and the third steel bars are all fixedly connected by steel wires. Grouting holes for fixing concrete are formed among several first steel bars, several second steel bars and several third steel bars.

[0007] Specifically, the load-bearing mechanism includes a first fixing plate and a grouting groove. Several first steel bars, several second steel bars and several third steel bars extend to the inner wall of the first fixing plate for concrete pouring. A grouting groove for grouting is opened at the top of the first fixing plate in the shape of a hollow cuboid structure.

[0008] Specifically, the connecting mechanism includes a second fixed plate and an installation opening. A second fixed plate with a "U"-shaped side structure is cast on the outside of several first steel bars, several second steel bars, and several third steel bars at the bottom of the first fixed plate. The sides of the second fixed plate and the first fixed plate form a "square" structure.

[0009] Specifically, the alignment mechanism includes a fixed cylinder, a nut, a movable groove, a limiting plate, a sliding plate, a fixed rod, and a placement opening. Limiting plates with a trapezoidal cross-section are cast on the inner walls of the first fixed plate opposite to each other. An activity groove is formed between the two limiting plates. A number of sliding plates are slidably connected to the surfaces of the two limiting plates. A number of fixed cylinders with a hollow cylindrical structure penetrate one end of the sliding plates and extend into the grouting holes. And a number of fixed rods with a hollow cylindrical structure are slidably connected inside the fixed cylinders. Placement openings are provided at the tops of the fixed rods. Nuts are threadedly connected to the surfaces of the sliding plates. The top surface height of the first steel bars is lower than the bottom surface height of the limiting plates.

[0010] Specifically, the grouting mechanism includes a vibration opening, a fixed cover, a spring, a vibration groove, a vibration blade, and a material leakage opening. Fixed covers with a middle-hole frustum-shaped structure are threadedly connected to the tops of the fixed rods. Vibration openings for placing concrete vibration devices are provided at the tops of the fixed covers. Springs are wound around the surfaces of the fixed rods between the fixed covers and the fixed cylinders. Vibration grooves are oppositely provided on the side walls of the fixed cylinders. One end of a number of vibration blades penetrates the vibration grooves and is welded to the fixed rods. Material leakage openings are provided on the surfaces of the vibration blades. And the included angle between the vibration blades and the fixed rods is 45 degrees.

[0011] Specifically, the support mechanism includes a support, a support rod, a rotating shaft, and a fixed seat. Two fixed seats are fixedly connected to the side wall of the second fixed plate through bolts. A support rod is rotatably connected inside the two fixed seats through a rotating shaft. Supports are welded to the bottoms of the two support rods.

[0012] The present invention also provides a construction method for a longitudinal reinforcement anti-seepage core wall of a dam, and the method includes the following steps:

[0013] S1. After the first steel bars, the second steel bars, and the third steel bars are woven, the formwork is attached to the first steel bars, the second steel bars, and the third steel bars;

[0014] S2. After determining the distance between each steel bar, according to the measured data, slide a number of sliding plates to the positions where the steel bars need to be connected, and then fix them with nuts;

[0015] S3. Inject slurry into the inside of the second fixed plate. When grouting, place a vibration pump inside the vibration groove. The vibration blades fill the grouting holes with mortar. When the slurry is injected to the top position of the fixed cylinder, stop injecting the concrete.

[0016] The beneficial effects of the present invention:

[0017] (1) The present invention casts a load-bearing structure on the top of the connecting mechanism to realize the installation of the drain outlet. The internal hollow load-bearing structure reduces the weight of the entire structure during transportation, which is convenient for transportation, reduces the area of ​​cast-in-place, and improves the speed of construction. The internal sliding connection alignment mechanism of the load-bearing structure facilitates the installation of the two units. The grouting mechanism moves with the alignment mechanism while the alignment mechanism is adjusted, which is convenient for adjustment. After the grouting is completed, the alignment mechanism is fixed.

[0018] (2) During installation of the present invention, after the distance between each steel bar is determined according to the measured data, several slide plates are slid to determine the position of the steel bar to be connected, and then the nuts are fixed to ensure that the steel bar to be connected can be inserted into the interior of the fixing rod, which is convenient for installation. When the two connection units are connected, grouting is injected into the interior of the second fixing plate to fix the fixing tube, and after the fixing tube is fixed, the steel bar is inserted into the interior of the fixing rod to fix another wall unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 A schematic diagram of the overall structure of a preferred embodiment of a longitudinal reinforcement anti-seepage core wall based on a dam provided by the present invention;

[0021] Figure 2 for Figure 1 An enlarged schematic diagram of the structure of section A is shown;

[0022] Figure 3 for Figure 2 The connection diagram of the load-bearing mechanism, grouting mechanism and alignment mechanism shown;

[0023] Figure 4 for Figure 3 The schematic diagram of the connection between the grouting mechanism and the alignment mechanism shown;

[0024] In the figure: 1. load-bearing mechanism, 11. first fixed plate, 12. grouting groove, 2. supporting mechanism, 21. steel wire, 22. first steel bar, 23. second steel bar, 24. third steel bar, 25. grouting hole, 3. supporting mechanism, 31. support, 32. support rod, 33. rotating shaft, 34. fixed seat, 4. connecting mechanism, 41. second fixed plate, 42. installation port, 5. grouting mechanism, 51. vibration port, 52. fixed cover, 53. spring, 54. vibration groove, 55. vibration page, 56. leakage port, 6. alignment mechanism, 61. fixed cylinder, 62. nut, 63. movable groove, 64. limit plate, 65. slide plate, 66. fixed rod, 67. placement port. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0026] Embodiment 1, as Figures 1-4 shown, the present invention provides a longitudinal reinforcement anti-seepage core wall based on a dam, including a load-bearing mechanism 1, a support mechanism 2, a support mechanism 3, a connection mechanism 4, a grouting mechanism 5 and an alignment mechanism 6; the outside of the support mechanism 2 for realizing the manufacture of the overall structure and the installation of concrete solidification is wrapped with a connection mechanism 4, and two groups of support mechanisms 3 for supporting the overall mechanism during installation are installed on the side of the connection mechanism 4. The top of the solid connection mechanism 4 inside is poured with a load-bearing mechanism 1 in the shape of a cuboid structure, hollow inside and open at the top. The inside of the load-bearing mechanism 1 is slidably connected with an alignment mechanism 6 for realizing the connection of two overall structures, and the inside of the alignment mechanism 6 is slidably connected with a grouting mechanism 5 for facilitating grouting.

[0027] The support mechanism 2 includes steel wires 21, first steel bars 22, second steel bars 23, third steel bars 24 and grouting holes 25. The first steel bars 22 are vertically woven at equal intervals at the bottom of the load-bearing mechanism 1. Among several second steel bars 23 located on the side wall of the load-bearing mechanism 1, the second steel bars 23 are fixedly connected at equal intervals and vertically by steel wires 21. On the side of the load-bearing mechanism 1, third steel bars 24 are fixedly connected at equal intervals and vertically by steel wires 21. The first steel bars 22, second steel bars 23 and third steel bars 24 are all fixedly connected by steel wires 21. Among several first steel bars 22, several second steel bars 23 and several third steel bars 24, grouting holes 25 for fixing concrete are formed. The first steel bars 22, second steel bars 23 and third steel bars 24 are woven together by steel wires 21. After being woven into a "U" shape structure, the pouring of the connection mechanism 4 is realized. When pouring, the concrete enters the inside of the grouting holes 25, and the solidification of the concrete between the formwork and the steel bars is realized.

[0028] The load-bearing mechanism 1 includes a first fixing plate 11 and a grouting groove 12. Several first steel bars 22, several second steel bars 23 and several third steel bars 24 extend to the inner wall of the first fixing plate 11 where concrete is poured. A grouting groove 12 for grouting is opened at the top of the first fixing plate 11 in the shape of a hollow cuboid structure. The formwork is fixed on the side of the connection mechanism 4. After the formwork is placed on the side of the connection mechanism 4 to form the first fixing plate 11, the hollow inside of the first fixing plate 11 realizes the installation of the grouting mechanism 5. The hollow first fixing plate 11 realizes grouting after installation, which is convenient for handling and reduces the weight of the overall structure.

[0029] The connecting mechanism 4 includes a second fixing plate 41 and an installation opening 42. A second fixing plate 41 with a "U"-shaped side structure is cast on the outer sides of several first steel bars 22, several second steel bars 23, and several third steel bars 24 at the bottom of the first fixing plate 11. The side surfaces of the second fixing plate 41 and the first fixing plate 11 form a "square" structure. After weaving the first steel bars 22, second steel bars 23, and third steel bars 24, the formwork is attached to the first steel bars 22, second steel bars 23, and third steel bars 24, and pouring concrete realizes the formation of the second fixing plate 41, and the installation opening 42 formed inside the second fixing plate 41 realizes the installation of the drainage opening.

[0030] The alignment mechanism 6 includes a fixing cylinder 61, a nut 62, a movable groove 63, a limiting plate 64, a sliding plate 65, a fixing rod 66, and a placement opening 67. The inner wall of the first fixing plate 11 has a limiting plate 64 with a trapezoidal structure relative to the pouring cross-section. A movable groove 63 is formed between the two limiting plates 64. The surfaces of the two limiting plates 64 are slidably connected with several sliding plates 65. Several fixing cylinders 61 with a hollow cylindrical structure penetrate one end of the sliding plates 65 and extend into the internal grouting holes 25, and several fixing rods 66 with a hollow cylindrical structure are slidably connected inside the several fixing cylinders 61. Placement openings 67 are formed at the tops of the several fixing rods 66. Nuts 62 are threadedly connected to the surfaces of the several sliding plates 65. The top surface height of the first steel bar 22 is lower than the bottom surface height of the limiting plate 64. When installing, if it is found that the steel bars of another wall to be installed do not correspond to the fixing rods 66 or the connection holes of another wall do not correspond during production and manufacturing, after determining the distance between each steel bar, according to the measured data, the several sliding plates 65 are slid to determine the position corresponding to the steel bars to be connected, and then the nuts 62 are fixed to ensure that the steel bars to be connected can be inserted into the internal fixing rods 66. The moving range of the fixing cylinders 61 is between the two third steel bars 24.

[0031] The grouting mechanism 5 includes a vibration port 51, a fixed cover 52, a spring 53, a vibration groove 54, vibration vanes 55 and a material leakage port 56. The tops of several fixing rods 66 are threadedly connected to form a fixed cover 52 with a middle-hole frustum structure. The tops of several fixed covers 52 are provided with vibration ports 51 for placing a concrete vibration device. A spring 53 is wound around the surface of the fixing rod 66 between the fixed cover 52 and the fixed cylinder 61. Vibration grooves 54 are oppositely provided on the side walls of several fixed cylinders 61. One end of several vibration vanes 55 passing through the vibration grooves 54 is welded to the fixing rod 66. Material leakage ports 56 are provided on the surfaces of several vibration vanes 55, and the included angle between the vibration vanes 55 and the fixing rod 66 is 45 degrees. After determining the position of the slide plate 65 and the position of the steel bars to be connected, several springs 53 are inserted outside the fixing rod 66. Further, the fixed cover 52 is threadedly connected to the fixing rod 66. Injecting slurry into the interior of the second fixing plate 41 realizes pouring the grouting groove 12 with the second fixing plate 41 as a template. During grouting, a vibration pump can be placed inside the vibration groove 54 to realize the sliding of the fixing rod 66 inside the fixed cylinder 61. The vibration vanes 55 fill the grouting holes 25 with mortar. When the slurry is injected to the top position of the fixed cylinder 61, the injection of concrete is stopped. At this time, the fixed cover 52 and the spring 53 are disassembled for convenient next use. Using this installation method solves the problem of non-corresponding connection holes between two walls on the one hand, and reduces the weight of the overall structure on the other hand, facilitating handling and installation and accelerating the construction speed.

[0032] The support mechanism 3 includes a support 31, a support rod 32, a rotating shaft 33 and a fixed seat 34. The side wall of the second fixing plate 41 is fixedly connected to two fixed seats 34 by bolts. A support rod 32 is rotatably connected inside the two fixed seats 34 through a rotating shaft 33. The bottoms of the two support rods 32 are welded to the support 31. During installation, the support rod 32 supports the overall structure to prevent tilting.

[0033] Embodiment 2. In addition to including the longitudinal reinforcement impervious core wall of the dam in Embodiment 1, this embodiment also provides a construction method for the longitudinal reinforcement impervious core wall of the dam. The method includes the following steps:

[0034] S1. After weaving the first steel bar 22, the second steel bar 23 and the third steel bar 24, fit the template to the first steel bar 22, the second steel bar 23 and the third steel bar 24;

[0035] S2. After determining the distance between each steel bar and according to the measured data, slide several slide plates 65 to the positions of the steel bars to be connected and fix them with nuts 62;

[0036] S3. Inject slurry into the interior of the second fixing plate 41. During grouting, place a vibration pump inside the vibration groove 54. The vibration vanes 55 fill the grouting holes 25 with mortar. When the slurry is injected to the top position of the fixed cylinder 61, stop the injection of concrete.

[0037] During use, first, after the first steel bar 22, the second steel bar 23 and the third steel bar 24 are woven, the formwork is attached to the first steel bar 22, the second steel bar 23 and the third steel bar 24, and concrete is poured to form the second fixing plate 41. The installation opening 42 formed inside the second fixing plate 41 realizes the installation of the drainage opening. The formwork is fixed on the side of the connecting mechanism 4. After the formwork is placed on the side of the connecting mechanism 4 to form the first fixing plate 11, the hollow interior of the first fixing plate 11 realizes the installation of the grouting mechanism 5. The hollow interior of the first fixing plate 11 realizes grouting after installation, which is convenient for handling and reduces the weight of the overall structure. Then, during installation, if it is found that the steel bars of another wall to be installed do not correspond to the fixing rods 66 or the connection holes of another wall do not correspond during production and manufacturing, after determining the distance between each steel bar, the positions of several sliding plates 65 are slid according to the measured data to correspond to the positions of the steel bars to be connected, and then the nuts 62 are fixed to ensure that the steel bars to be connected can be inserted into the interior of the fixing rods 66. The moving range of the fixing cylinder 61 is between the two third steel bars 24. Finally, after the positions of the sliding plates 65 and the positions of the steel bars to be connected are determined, several springs 53 are inserted outside the fixing rods 66. Further, the fixing cover 52 is threadedly connected to the fixing rods 66. Injecting slurry into the interior of the second fixing plate 41 realizes the pouring and grouting of the grouting groove 12 with the second fixing plate 41 as the formwork. During grouting, a vibration pump can be placed inside the vibration groove 54 to realize the sliding of the fixing rods 66 inside the fixing cylinders 61. The vibration blades 55 fill the grouting holes 25 with mortar. When the slurry is injected to the top position of the fixing cylinder 61, the injection of concrete is stopped. At this time, the fixing cover 52 and the springs 53 are disassembled for convenient use next time. Using this installation method solves the problem of non-corresponding connection holes between two walls on the one hand, and reduces the weight of the overall structure, facilitates handling and installation, and speeds up the construction speed on the other hand. After the installation of the two units is completed, the formwork is attached to the junction of the two connecting units, and concrete is injected to fix the two units.

[0038] It should be noted that taking the construction of a certain dam as an example, after the concrete core wall reaches a certain elevation (a certain height) during the dam filling, it is constructed by the method of the cut-off wall of concrete in the transition material area. Before the pouring of the wall concrete, grouting steel pipes for the curtain grouting construction under the wall are pre-buried. The upper part of the cut-off wall of the concrete core wall can be connected to the lower part of the cut-off wall of the concrete core wall by steel bars with cast-in-place concrete core wall. In other words, the lower part of the core wall is formed by drilling and excavation. It is impossible to adopt the formwork process for dozens of meters of hole depth. After the construction of the core wall under the construction platform is completed, the part of the core wall above the construction platform is poured with concrete in the original groove, and the formwork can be used for this part to explain the scope of use of Embodiment 1 and Embodiment 2.

[0039] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A longitudinal reinforcement impervious core wall based on a dam, characterized in that: It includes a load-bearing mechanism (1), a support mechanism (2), a bracing mechanism (3), a connection mechanism (4), a grouting mechanism (5) and an alignment mechanism (6); The outside of the support mechanism (2) used to manufacture the overall structure and realize the installation of concrete solidification is wrapped with the connection mechanism (4), and two groups of the support mechanisms (3) used to support the overall mechanism during installation are installed on the side of the connection mechanism (4); On the top of the internally solid connection mechanism (4), the load-bearing mechanism (1) with a cuboid structure, hollow inside and open at the top is cast. Inside the load-bearing mechanism (1), the alignment mechanism (6) used to connect two overall structures is slidably connected, and inside the alignment mechanism (6), the grouting mechanism (5) used to facilitate grouting is slidably connected; The support mechanism (2) includes steel wires (21), first steel bars (22), second steel bars (23), third steel bars (24) and grouting holes (25), and the first steel bars (22) are vertically woven equidistantly at the bottom of the load-bearing mechanism (1); The load-bearing mechanism (1) includes a first fixing plate (11) and a grouting groove (12), and several of the first steel bars (22), several of the second steel bars (23) and several of the third steel bars (24) extend to the inner wall of the first fixing plate (11) where concrete is poured; The alignment mechanism (6) includes a fixing cylinder (61), a nut (62), a movable groove (63), a limiting plate (64), a sliding plate (65), a fixing rod (66) and a placing opening (67). The limiting plate (64) with a trapezoidal structure relative to the pouring cross-section is on the inner wall of the first fixing plate (11). The movable groove (63) is formed between the two limiting plates (64). Several sliding plates (65) are slidably connected to the surfaces of the two limiting plates (64). One end of several hollow cylindrical fixing cylinders (61) penetrates through the sliding plate (65) and extends into the grouting hole (25), and a hollow cylindrical fixing rod (66) is slidably connected inside several of the fixing cylinders (61). The placing openings (67) are opened at the tops of several of the fixing rods (66). Nuts (62) are threadedly connected to the surfaces of several of the sliding plates (65). The top surface height of the first steel bar (22) is lower than the bottom surface height of the limiting plate (64).

2. The longitudinal reinforcement impervious core wall based on a dam according to claim 1, wherein: The second steel bars (23) are fixedly connected to each other at equal intervals and vertically by the steel wires (21) between several of the second steel bars (23) on the side wall of the load-bearing mechanism (1). The third steel bars (24) are fixedly connected to each other at equal intervals and vertically by the steel wires (21) on the side of the load-bearing mechanism (1). The first steel bars (22), the second steel bars (23) and the third steel bars (24) are all fixedly connected by the steel wires (21). The grouting holes (25) for fixing the concrete are formed between several of the first steel bars (22), several of the second steel bars (23) and several of the third steel bars (24).

3. A longitudinal reinforcement impervious core wall based on a dam according to claim 2, characterized in that: A grouting groove (12) for grouting is formed at the top of the first fixing plate (11) having a hollow cuboid structure.

4. A longitudinal reinforcement impervious core wall based on a dam according to claim 3, characterized in that: The connecting mechanism (4) includes a second fixing plate (41) and an installation opening (42). The second fixing plate (41) with a side surface in a "U" - shaped structure is cast outside a number of the first steel bars (22), a number of the second steel bars (23), and a number of the third steel bars (24) at the bottom of the first fixing plate (11). The side surfaces of the second fixing plate (41) and the first fixing plate (11) are in a "square" - shaped structure.

5. A longitudinal reinforcement anti-seepage core wall based on a dam according to claim 4, characterized in that: The grouting mechanism (5) includes a vibration opening (51), a fixing cover (52), a spring (53), a vibration groove (54), vibration blades (55), and a material leakage opening (56). The fixing cover (52) having a middle - hole frustum - shaped structure is threadedly connected to the top of a number of the fixing rods (66). A vibration opening (51) for placing a concrete vibration device is formed at the top of a number of the fixing covers (52). The spring (53) is wound around the surface of the fixing rod (66) between the fixing cover (52) and the fixing cylinder (61). Vibration grooves (54) are oppositely formed in the side walls of a number of the fixing cylinders (61). One end of a number of the vibration blades (55) passing through the vibration grooves (54) is welded to the fixing rod (66). A material leakage opening (56) is formed on the surface of a number of the vibration blades (55), and the included angle between the vibration blade (55) and the fixing rod (66) is 45 degrees.

6. The longitudinal reinforcement impervious core wall based on a dam according to claim 5, characterized in that: The support mechanism (3) includes a support (31), a support rod (32), a rotating shaft (33), and a fixing base (34). Two fixing bases (34) are fixedly connected to the side wall of the second fixing plate (41) by bolts. The support rod (32) is rotatably connected inside the two fixing bases (34) through the rotating shaft (33). The support (31) is welded to the bottom of the two support rods (32).

7. A construction method of a longitudinal reinforcement impervious core wall based on a dam according to claim 6, characterized in that, The construction method includes the following steps: S1. After weaving the first steel bar (22), the second steel bar (23), and the third steel bar (24), fit the formwork to the first steel bar (22), the second steel bar (23), and the third steel bar (24). S2. After determining the distance between each steel bar and according to the measured data, slide a number of the sliding plates (65) to the positions where the steel bars need to be connected, and then fix them with the nuts (62). S3. Inject slurry into the inside of the second fixing plate (41). When grouting, place a vibration pump inside the vibration groove (54). The vibration blades (55) fill the grouting holes (25) with mortar. Stop injecting concrete when the slurry reaches the top position of the fixing cylinder (61).

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