Covering layer suspension type prefabricated member diaphragm wall and construction method

Abstract

The invention discloses a covering layer suspension type prefabricated member diaphragm wall and a construction method, and relates to the technical field of civil engineering. The covering layer suspension type prefabricated member diaphragm wall comprises first prefabricated concrete and second prefabricated concrete which are connected in an inserted mode, grooves are formed in the two transverse sides of the first prefabricated concrete, protruding keys are arranged on the two transverse sides of the second prefabricated concrete, and the protruding keys are inserted into the grooves to achieve inserted connection. Vertical insertion holes are formed in the first prefabricated concrete and the second prefabricated concrete which are overlapped, vertical reinforcing rods are arranged in the vertical insertion holes, and the first prefabricated concrete and the second prefabricated concrete on the front side are provided with transverse supports connected with the first prefabricated concrete and the second prefabricated concrete on the rear side. The construction method comprises the steps of manufacturing, mounting, connecting, pouring and the like. According to the covering layer suspension type prefabricated member diaphragm wall and the construction method, the construction quality is improved, and meanwhile the project investment and cost can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering, and in particular to a cover layer suspended prefabricated anti-seepage wall and a construction method thereof. Background Art

[0002] Generally speaking, in water conservancy projects, anti-seepage walls are built in loose permeable layers or earth-rock dams to play an anti-seepage role. Anti-seepage wall technology originated in Europe in the 1950s. It has been widely used because of its reliable technical structure, good anti-seepage effect, and applicability to various types of stratum environments, simple construction, and low cost. In particular, it has a good effect on the prevention and control of dam foundation leakage and soil flow behind the dam. Anti-seepage reinforcement is the main engineering measure for dealing with dangerous reservoir dams. Commonly used anti-seepage reinforcement technologies include grouting anti-seepage reinforcement and anti-seepage wall reinforcement technology. Among them, high-strength concrete or plastic concrete anti-seepage wall technology is widely used in the risk removal of embankment projects.

[0003] Usually, the construction of the cut-off wall is generally carried out before the dam is filled. However, constructing the cut-off wall first will take up construction time and space, resulting in the inability to fill the land, affecting the construction progress of the land, and even failing to meet the requirements of flood control. At the same time, if a dam body of a certain height is built on the upper part after the construction of the suspended cut-off wall, the vertical pressure generated by the filled dam body will cause deformation of the cut-off wall, stress redistribution, and poor anti-seepage effect. For the suspended cut-off wall in the ultra-deep overburden formation, if the cut-off wall is constructed on the land, it can reduce the impact of the land on the settlement, deformation, stress adjustment, and anti-seepage effect of the cut-off wall. However, on the one hand, the mud used in the construction of the anti-seepage wall will inevitably seep into the interior of the fill. The interior of the fill within a certain range is filled with saturated mud. Under earthquake conditions, the dam may have serious safety hazards. On the other hand, it is difficult to construct an anti-seepage wall in the fill, and the cost of hole making and underwater concrete pouring is high, which will lead to a significant increase in investment and cost.

[0004] Therefore, the prior art needs to be improved. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the suspended anti-seepage wall in the prior art has poor anti-seepage effect, potential safety hazards and high construction cost. The purpose is to provide a covering layer suspended prefabricated anti-seepage wall and a construction method. The conditions for partial concrete open pouring construction can be achieved through prefabricated grooves and convex keys, which is beneficial to the joint connection and concrete pouring quality, improves the structure of the anti-seepage body, and can effectively reduce project investment and cost while improving construction quality.

[0006] The present invention is achieved through the following technical solutions:

[0007] A cover layer suspended prefabricated anti-seepage wall, comprising a first precast concrete and a second precast concrete plugged into each other, the first precast concrete having grooves on both lateral sides, the second precast concrete having convex keys on both lateral sides, the convex keys being inserted into the grooves to achieve plug-in connection, the first precast concrete and the second precast concrete being vertically overlapped to form a wall, the overlapping first precast concrete and the second precast concrete both having vertical insertion holes, the vertical insertion holes being provided with vertical reinforcing rods, the first precast concrete and the second precast concrete on the front side being provided with lateral supports connected to the first precast concrete and the second precast concrete on the rear side.

[0008] Furthermore, in the present invention, the front and rear sides of the first precast concrete and the second precast concrete are both fixedly provided with connecting plates, and the connecting plates are fixedly connected to the lateral supports.

[0009] Furthermore, in the present invention, the connecting plate is provided with a first connecting hole, the lateral support is provided with a flange, the flange is provided with a second connecting hole aligned with the first connecting hole, and the first connecting hole and the second connecting hole are fixed by inserting screws.

[0010] Furthermore, in the present invention, the connection plate is provided with a pre-embedded L-shaped fixing piece.

[0011] Furthermore, in the present invention, the connecting plates on one side are arranged symmetrically left and right and symmetrically up and down.

[0012] Furthermore, in the present invention, the above-mentioned lateral support is configured as a steel pipe.

[0013] Furthermore, in the present invention, the vertical reinforcing rod is configured as a steel pipe.

[0014] Furthermore, in the present invention, the interior of the above-mentioned lateral support is filled with concrete before installation, and the interior of the above-mentioned vertical reinforcing rod is poured with concrete after installation.

[0015] In a second aspect, the present invention further provides a construction method, which uses the above-mentioned cover layer suspended prefabricated anti-seepage wall, and also includes the following method:

[0016] S1. The stacking height of the suspended precast anti-seepage wall of the cover layer is the dam body filling line; the first precast concrete and the second precast concrete are overlapped and stacked simultaneously with the dam body filling to the specified height; the second phase of the lateral support is installed simultaneously;

[0017] S2. After filling to the specified elevation, start digging and milling the first-stage anti-seepage wall below the filling line; pour the first-stage anti-seepage wall below the filling line;

[0018] S3. Dig and mill the second-phase anti-seepage wall below the filling line, and cast the second-phase anti-seepage wall below the filling line;

[0019] S4. Transfer the second phase lateral support to the first phase;

[0020] S4. Above the filling line from the second stage of open pouring;

[0021] S5. Remove the first phase horizontal support and cast the first phase above the fill line.

[0022] Furthermore, in the present invention, in the above step S4, concrete is discharged through a chute, and concrete pouring is performed through sliding membranes arranged at both ends.

[0023] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0024] The present invention provides a cover layer suspended prefabricated anti-seepage wall, comprising a first precast concrete and a second precast concrete, wherein grooves are provided on the left and right sides of the first precast concrete in the horizontal direction, and convex keys are provided on the left and right sides of the second precast concrete in the horizontal direction, and the first precast concrete and the second precast concrete are plugged in by the cooperation of the grooves and the convex keys. The first precast concrete and the second precast concrete are constructed vertically, and the vertical reinforcing rod passes through the vertical plug hole to strengthen the structural strength of the wall. The front wall and the rear wall are connected by a lateral support. The groove and the convex key have a simple structure and are easy to manufacture and process, and the shear resistance problem between the precast blocks is solved by the cooperation of the groove and the convex key, and the precast parts can be connected together to improve the integrity of the precast guide groove. Compared with the original anti-seepage wall construction technology, it can avoid the mud from penetrating into the interior of the filling body due to the mud consolidation of the wall, resulting in the risk of the filling body running in earthquake conditions. The wall formed by the first precast concrete and the second precast concrete on the front side and the wall formed by the first precast concrete and the second precast concrete on the rear side are connected by transverse supports, and the space between them is a guide groove. The precast guide groove can be used to achieve conditions for partial concrete open pouring construction, which is beneficial to the joint connection and concrete pouring quality, improves the structure of some anti-seepage bodies, and can effectively reduce project investment and costs while improving construction quality.

[0025] The present invention also provides a construction method, wherein the stacking elevation of the cover layer suspended prefabricated anti-seepage wall is the dam body filling line; the first precast concrete and the second precast concrete are overlapped and carried out synchronously with the dam body filling, and are stacked to a specified elevation; the second phase lateral support is installed synchronously; after filling to the specified elevation, the first phase anti-seepage wall below the filling line is started to be excavated and milled; the first phase anti-seepage wall below the filling line is cast; the second phase anti-seepage wall below the filling line is excavated and milled, and the second phase anti-seepage wall below the filling line is cast; the second phase lateral support is transferred to the first phase; the second phase is openly cast above the filling line; the first phase lateral support is removed, and the first phase is openly cast above the filling line. The first precast concrete and the second precast concrete are installed, and then the first precast concrete and the second precast concrete are vertically overlapped to form a wall body, the lateral support is installed, and finally the concrete is cast to form an anti-seepage wall. The shear resistance problem between the precast blocks is solved by the cooperation of the groove and the convex key, and the conditions for the open pouring of the anti-seepage wall concrete above the dam body filling line can be realized by the precast guide groove, which is beneficial to the joint connection and the concrete pouring quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0027] Figure 1 It is a schematic diagram of the cover layer suspended prefabricated anti-seepage wall of the present invention;

[0028] Figure 2 is a schematic diagram of a first precast concrete according to the present invention;

[0029] Figure 3 It is a schematic diagram of the end of the lateral support of the present invention;

[0030] Figure 4 It is a schematic diagram of the connection between the transverse support and the first precast concrete of the present invention;

[0031] Figure 5 It is a construction schematic diagram of the cover layer suspended prefabricated anti-seepage wall of the present invention;

[0032] Figure 6 It is a construction schematic diagram of the first phase of the anti-seepage wall excavation and milling of the present invention;

[0033] Figure 7 It is a construction schematic diagram of pouring the first phase anti-seepage wall (below the filling line) of the present invention;

[0034] Figure 8 It is a construction schematic diagram of the lateral support transfer (from the second phase to the first phase) of the present invention;

[0035] Fig. 9 It is a construction schematic diagram of the excavation and milling of the second phase anti-seepage wall of the present invention;

[0036] Fig.10 It is a construction schematic diagram of pouring the second phase anti-seepage wall (below the filling line) of the present invention;

[0037] Fig.11 It is a construction schematic diagram of pouring the second phase anti-seepage wall (above the filling line) of the present invention;

[0038] Fig.12 It is a construction schematic diagram of the first phase of the anti-seepage wall pouring (above the filling line) of the present invention.

[0039] Markings and corresponding parts names in the accompanying drawings: 1-first precast concrete, 101-groove, 2-second precast concrete, 201-key, 3-vertical socket, 4-vertical reinforcement rod, 5-lateral support, 501-flange, 502-second connecting hole, 6-connecting plate, 601-first connecting hole, 602-L-shaped fixing piece. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation mode of the present invention and its description are only used to explain the present invention and are not intended to limit the present invention. The following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "install", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0042] Example 1

[0043] Combination Figures 1 to 4As shown, a cover layer suspended prefabricated anti-seepage wall according to an embodiment of the present invention, the specific structure is described as follows.

[0044] The covering layer suspended prefabricated anti-seepage wall of this embodiment is mainly composed of four parts: a first precast concrete 1, a second precast concrete 2, a vertical reinforcing rod 4 and a transverse support 5. The first precast concrete 1 and the second precast concrete 2 are used to overlap to form a wall, the vertical reinforcing rod 4 enhances the strength of the wall, and the transverse support 5 is used to stabilize the space between the walls.

[0045] Further, combined with Figure 1 and Figure 2 As shown, the first precast concrete 1 and the second precast concrete 2 are both rectangular precast concrete blocks with specifications of 7m×1m×1.5m (length×width×height), and a steel mesh is installed inside the precast concrete blocks to increase strength. Grooves 101 are opened on the left and right sides of the first precast concrete 1, and convex keys 201 are installed on the left and right sides of the second precast concrete 2. The convex keys 201 and the grooves 101 are the same size.

[0046] Combination Figure 1 As shown, the first precast concrete 1 and the second precast concrete 2 are sequentially inserted into a row, and the two second precast concretes 2 are located on both sides of the first precast concrete 1. The grooves 101 on both sides of the first precast concrete 1 are inserted by the convex keys 201 of the second precast concrete 2 on both sides. A row of first precast concrete 1 and second precast concrete 2 is overlapped with another row of first precast concrete 1 and second precast concrete 2. Multiple rows of vertically overlapped first precast concrete 1 and second precast concrete 2 form a wall. Multiple rows of vertically overlapped first precast concrete 1 and second precast concrete 2 are provided with structural joints and rubber water stop to ensure the anti-seepage effect.

[0047] In some implementations of this embodiment, Figure 1 As shown, vertical sockets 3 are provided vertically through the first precast concrete 1 and the second precast concrete 2. The vertical sockets 3 of the first precast concrete 1 and the second precast concrete 2 in the upper row are aligned with the vertical sockets 3 of the first precast concrete 1 and the second precast concrete 2 in the lower row. After alignment, vertical reinforcing rods 4 are inserted into the vertical sockets 3.

[0048] It should be noted that the vertical reinforcing rod 4 can be made of steel pipes, and after the first precast concrete 1 and the second precast concrete 2 are overlapped and the vertical reinforcing rod 4 is installed in place, concrete is poured inside the vertical reinforcing rod 4 to enhance the strength of the vertical reinforcing rod 4, thereby increasing the strength of the wall.

[0049] In some implementations of this embodiment, Figure 1 and Figure 4As shown, the two walls are stably supported by a transverse support 5, and the space between the two walls is a guide groove. Figure 3 As shown, flanges 501 are fixedly mounted at both ends of the transverse support 5 , and a plurality of evenly spaced second connection holes 502 are opened on the surface of the flange 501 .

[0050] Further, combined with Figure 1 and Figure 2 As shown, the connecting plate 6 is a steel plate with a size of 500mm×500mm×10mm. Four connecting plates 6 are respectively fixed on the front and rear end surfaces of the first precast concrete 1 or the second precast concrete 2. The connecting plates 6 are respectively fixed at the four corners of the side surface. The four connecting plates 6 are arranged symmetrically from left to right and from top to bottom. A first connecting hole 601 is opened on the connecting plate 6. The second connecting hole 502 of the flange 501 is aligned with the first connecting hole 601 of the connecting plate 6, and then screws are inserted to fix them.

[0051] It should be noted that the first connection hole 601 may be a threaded hole to facilitate screw thread connection. Figure 3 As shown, the transverse support 5 is made of steel pipe, and before the transverse support 5 is installed through the flange 501 , the interior of the transverse support 5 is filled with concrete to increase the structural strength of the transverse support 5 .

[0052] In some implementations of this embodiment, Figure 4 As shown, an L-shaped fixing piece 602 is welded on the side of the connecting plate 6 away from the flange 501 . The L-shaped fixing piece 602 is embedded inside when the first precast concrete 1 or the second precast concrete 2 is poured, so as to enhance the firmness of the connecting plate 6 .

[0053] The working principle of the cover layer suspended prefabricated anti-seepage wall of this embodiment is as follows:

[0054] The groove 101 and the convex key 201 have a simple structure and are easy to manufacture and process. The shear resistance problem between prefabricated blocks can be solved by the cooperation of the groove 101 and the convex key 201. The prefabricated parts (the first prefabricated concrete 1 and the second prefabricated concrete 2) can be connected together to improve the integrity of the prefabricated guide groove. Compared with the original anti-seepage wall construction technology, it can avoid the mud from penetrating into the filling body due to the mud consolidation, which leads to the risk of the filling body running under earthquake conditions and affects the construction quality. The wall formed by the first prefabricated concrete 1 and the second prefabricated concrete 2 on the front side and the wall formed by the first prefabricated concrete 1 and the second prefabricated concrete 2 on the rear side are connected by a transverse support 5, and the space between them is a guide groove. The prefabricated guide groove can realize the conditions for open pouring of the anti-seepage wall concrete above the dam body filling line, which is beneficial to the joint connection and concrete pouring quality, improves the structure of some anti-seepage bodies, and can effectively reduce the project investment and cost while improving the construction quality.

[0055] Example 2

[0056] This embodiment provides a construction method, which uses the above-mentioned cover layer suspended prefabricated anti-seepage wall, and also includes the following method, combined with Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown,

[0057] S1. The stacking height of the suspended prefabricated anti-seepage wall of the cover layer is the dam body filling line; the first precast concrete 1 and the second precast concrete 2 are overlapped and carried out simultaneously with the dam body filling, and are stacked to the specified height; the second phase lateral support 5 is installed simultaneously;

[0058] S2. After filling to the specified elevation, start digging and milling the first-stage anti-seepage wall below the filling line; pour the first-stage anti-seepage wall below the filling line;

[0059] S3. Dig and mill the second-phase anti-seepage wall below the filling line, and cast the second-phase anti-seepage wall below the filling line;

[0060] S4. Transfer the second stage horizontal support 5 to the first stage;

[0061] S4. Above the filling line from the second stage of open pouring;

[0062] S5. Remove the first-stage horizontal support 5, and cast the first-stage from the filling line above

[0063] The vertical socket 3 is reserved when the first precast concrete 1 and the second precast concrete 2 are manufactured; the first precast concrete 1 and the second precast concrete 2 are installed to the anti-seepage position, the first precast concrete 1 and the second precast concrete 2 in the same horizontal row are plugged and connected in sequence, the first precast concrete 1 and the second precast concrete 2 are vertically overlapped, and the vertical reinforcing rod 4 is inserted into the vertical socket 3 to strengthen the vertical fixation; the transverse support 5 is installed, and the transverse support 5 connects the first precast concrete 1 and the second precast concrete 2 on the front side and the first precast concrete 1 and the second precast concrete 2 on the rear side; the concrete is poured to form an anti-seepage wall.

[0064] Furthermore, in the above steps S2 and S3, concrete is discharged through a chute and poured through a sliding membrane provided at both ends. The construction is divided into a first phase and a second phase according to the length of the wall formed by the first precast concrete 1 and the second precast concrete 2. During the construction of the first phase trench section, only the lateral support 5 of the second phase trench section is connected. After the first phase anti-seepage wall is poured, before the construction of the second phase anti-seepage wall, the lateral support 5 of the first phase trench section is restored, and then the lateral support 5 of the second phase trench section is removed.

[0065] Combination Figure 5As shown, the stacking elevation of the first precast concrete 1 and the second precast concrete 2 is the dam body filling line; the overlapping of the first precast concrete 1 and the second precast concrete 2 is carried out synchronously with the dam body filling, and is stacked to a specified elevation; the second phase lateral support 5 is installed synchronously; after filling to the specified elevation, start to dig and mill the first phase anti-seepage wall below the filling line; cast the first phase anti-seepage wall below the filling line; dig and mill the second phase anti-seepage wall below the filling line, and cast the second phase anti-seepage wall below the filling line; transfer the second phase lateral support to the first phase; openly cast the second phase above the filling line; remove the first phase lateral support, and openly cast above the first phase filling line.

[0066] In summary, the present invention provides a cover layer suspended prefabricated anti-seepage wall, which includes a first precast concrete 1 and a second precast concrete 2 plugged into each other, the first precast concrete 1 is provided with grooves 101 on both lateral sides, and the second precast concrete 2 is provided with convex keys 201 on both lateral sides, and the convex keys 201 are inserted into the grooves 101 to achieve plug-in connection, the first precast concrete 1 and the second precast concrete 2 are vertically overlapped to form a wall, the overlapping first precast concrete 1 and the second precast concrete 2 are both provided with vertical insertion holes 3, and the vertical insertion holes 3 are provided with vertical reinforcing rods 4, and the first precast concrete 1 and the second precast concrete 2 on the front side are provided with lateral supports 5 connected to the first precast concrete 1 and the second precast concrete 2 on the rear side. The front and rear sides of the first precast concrete 1 and the second precast concrete 2 are both fixedly provided with connecting plates 6, and the connecting plates 6 are fixedly connected to the lateral supports 5. The connecting plate 6 is provided with a first connecting hole 601, the transverse support 5 is provided with a flange 501, the flange 501 is provided with a second connecting hole 502 aligned with the first connecting hole 601, and the first connecting hole 601 and the second connecting hole 502 are fixed by inserting screws. The connecting plate 6 is provided with a pre-buried and fixed L-shaped fixing piece 602. The connecting plate 6 on one side is arranged symmetrically in the left and right and symmetrically in the upper and lower parts. The transverse support 5 is configured as a steel pipe. The vertical reinforcing rod 4 is configured as a steel pipe. The interior of the transverse support 5 is filled with concrete before installation, and the interior of the vertical reinforcing rod 4 is poured with concrete after installation. The present invention also provides a construction method. Therefore, the embodiment of the present invention provides a cover layer suspension type prefabricated anti-seepage wall and a construction method. The first precast concrete 1 and the second precast concrete 2 are combined by prefabricated grooves 101 and convex keys 201 to form an anti-seepage wall concrete pouring guide groove, which can form the conditions for partial concrete open pouring construction, which is conducive to joint connection and concrete pouring quality, improves the structure of the anti-seepage body, and can effectively reduce engineering investment and cost while improving construction quality.

[0067] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cover layer suspended prefabricated anti-seepage wall, characterized in that: The invention comprises a first precast concrete (1) and a second precast concrete (2) which are plugged into each other, wherein grooves (101) are provided on both lateral sides of the first precast concrete (1), and convex keys (201) are provided on both lateral sides of the second precast concrete (2), and the convex keys (201) are inserted into the grooves (101) to achieve plug-in connection, the first precast concrete (1) and the second precast concrete (2) are vertically overlapped to form a wall, the overlapping first precast concrete (1) and the second precast concrete (2) are both provided with vertical insertion holes (3), and vertical reinforcing rods (4) are provided in the vertical insertion holes (3), and the first precast concrete (1) and the second precast concrete (2) on the front side are provided with lateral supports (5) connected to the first precast concrete (1) and the second precast concrete (2) on the rear side.

2. The cover layer suspended prefabricated anti-seepage wall according to claim 1, characterized in that: The front and rear sides of the first precast concrete (1) and the second precast concrete (2) are both fixedly provided with connecting plates (6), and the connecting plates (6) are fixedly connected to the transverse supports (5).

3. The cover layer suspended prefabricated anti-seepage wall according to claim 2, characterized in that: The connecting plate (6) is provided with a first connecting hole (601), the transverse support (5) is provided with a flange (501), the flange (501) is provided with a second connecting hole (502) aligned with the first connecting hole (601), and the first connecting hole (601) and the second connecting hole (502) are fixed by inserting screws (7).

4. The cover layer suspended prefabricated anti-seepage wall according to claim 2, characterized in that: The connecting plate (6) is provided with a pre-buried and fixed L-shaped fixing piece (602).

5. The cover layer suspended prefabricated anti-seepage wall according to claim 2, characterized in that: The connecting plate (6) on one side is arranged symmetrically left and right and symmetrically up and down.

6. The cover layer suspended prefabricated anti-seepage wall according to claim 1, characterized in that: The transverse support (5) is configured as a steel pipe.

7. The cover layer suspended prefabricated anti-seepage wall according to claim 6, characterized in that: The vertical reinforcing rod (4) is configured as a steel pipe.

8. The cover layer suspended prefabricated anti-seepage wall according to claim 7, characterized in that: Before the transverse support (5) is installed, the interior thereof is filled with concrete, and after the vertical reinforcing rod (4) is installed, concrete is poured into the interior thereof.

9. A construction method, characterized in that: The cover layer suspended prefabricated anti-seepage wall according to any one of claims 1 to 8 further comprises the following method: S1. The stacking height of the cover layer suspended prefabricated anti-seepage wall is the dam body filling line; the first precast concrete (1) and the second precast concrete (2) are overlapped and carried out simultaneously with the dam body filling, and are stacked to the specified height; the second phase lateral support (5) is installed simultaneously; S2. After filling to the specified elevation, start digging and milling the first-stage anti-seepage wall below the filling line; pour the first-stage anti-seepage wall below the filling line; S3. Dig and mill the second-phase anti-seepage wall below the filling line, and cast the second-phase anti-seepage wall below the filling line; S4. Transfer the second-stage lateral support (5) to the first stage; S4. Above the filling line from the second stage of open pouring; S5. Remove the first-stage horizontal support (5) and cast the first-stage concrete above the fill line.

10. The construction method according to claim 9, characterized in that: In steps S2 and S3, concrete is discharged through the chute and poured through the sliding membranes arranged at both ends.

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