Half-excavation and half-filling whole reservoir basin anti-seepage drainage type

Abstract

The invention provides a half-excavation and half-filling whole reservoir basin seepage-proofing drainage type which comprises an asphalt concrete panel arranged along the peripheral side of a reservoir basin and a geomembrane laid at the reservoir bottom, and the asphalt concrete panel on one side of a reservoir bank is in lap joint with the geomembrane by arranging a reservoir bank concrete gallery. The asphalt concrete panel on the concrete faced rockfill dam is in lap joint with the geomembrane through the concrete connecting plate, and the asphalt concrete panel and the geomembrane are connected and fixed through the concrete connecting plate and the reservoir bank concrete gallery. The problem that a concrete panel adopted by a high dam is easy to extrude and damage and the defect that an asphalt concrete panel at the upper reservoir bottom of a high slag filling body is difficult to adapt to non-uniform deformation are overcome, and a new anti-seepage solution is provided for projects with complex terrain and geological conditions, high dam height, deep reservoir bottom filling and poor filling materials; by arranging the reservoir bank concrete gallery, the reservoir bottom concrete gallery and the forebay concrete gallery, a partition monitoring system is formed, the leakage defect part of the reservoir basin can be quickly and effectively identified, and the engineering operation safety is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy and hydropower, and in particular to a half-dig and half-fill full reservoir basin anti-seepage drainage type. Background Art

[0002] With the rapid construction of water conservancy and hydropower projects, the topographic and geological conditions of the projects are becoming more and more complex. For projects with poor geological conditions, especially low groundwater levels and leakage channels in the reservoir basin, the full reservoir basin anti-seepage type is often used. When the terrain conditions are complex, it is necessary to trim the terrain to form a regular reservoir basin, and the reservoir basin is often arranged in a half-cut and half-fill manner.

[0003] For projects with a half-cut and half-fill reservoir basin layout, it is necessary to fill part of the soil in the excavation area into the backfill area. The reservoir basin in the backfill area is filled deeply. In some projects, the filling depth of the reservoir bottom backfill area even reaches hundreds of meters. In order to control costs, poor quality materials are often used for reservoir bottom filling, resulting in prominent uneven deformation of the reservoir bottom in the backfill area. Therefore, appropriate anti-seepage measures are needed for the different designs of the excavation area and the backfill area. In addition, the workload of reservoir basin leakage investigation is large and the investigation cost is high. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a half-excavated and half-filled full reservoir basin anti-seepage drainage type, which can solve the problem of how to design appropriate anti-seepage measures for the different excavation areas and backfill areas when the reservoir basin adopts a half-excavated and half-filled layout.

[0005] To this end, the present invention adopts the following technical solutions: A half-cut and half-filled full reservoir basin anti-seepage drainage type includes asphalt concrete panels arranged along the periphery of the reservoir basin and a geomembrane laid on the reservoir bottom. The asphalt concrete panels on one side of the reservoir bank are overlapped with the geomembrane by arranging a reservoir bank concrete corridor, and the asphalt concrete panels on the panel rockfill dam are overlapped with the geomembrane by arranging the concrete connecting plate.

[0006] On the basis of adopting the above technical solutions, the present invention may also adopt the following further technical solutions, or use these further technical solutions in combination: A reservoir bottom concrete gallery is arranged at the junction of the reservoir basin excavation area and the reservoir basin backfill area, and both ends of the reservoir bottom concrete gallery are overlapped with the reservoir bank concrete gallery.

[0007] The reservoir backfill area is also provided with a forepool and a water inlet / outlet, and a forepool concrete corridor is provided at the junction of the forepool and the asphalt concrete panel.

[0008] An arc section is provided at the bottom of the asphalt concrete panel located on the panel rockfill dam, and the concrete connecting plate is tangentially overlapped with the arc section of the asphalt concrete panel. One side of the geomembrane is fixed to the concrete panel by an anchoring structure and then extended to the asphalt concrete panel for bonding and fixing.

[0009] The asphalt concrete panel located on one side of the reservoir bank is an inclined straight slope from one end to the other, the reservoir bank concrete corridor is located at the bottom of the slope of the asphalt concrete panel, and one side of the geomembrane is extended to the reservoir bank concrete corridor and fixed with an anchoring structure.

[0010] The forepool concrete corridor is located below the reservoir bank concrete corridor, the water inlet / outlet is located between the forepool concrete corridor and the reservoir bank concrete corridor, and anti-seepage concrete is poured around the water inlet / outlet. The geomembrane on one side of the forepool concrete corridor is directly fixed to the reservoir bank concrete corridor using an anchoring structure, and the leakage water of the geomembrane in the forepool is collected in the forepool concrete corridor for monitoring.

[0011] The dam body of the panel rockfill dam is provided with upstream rockfill and downstream rockfill respectively from upstream to downstream, a dam body transition material is provided on the slope of the upstream rockfill, a dam body cushion material is provided on the dam body transition material, the asphalt concrete panel is provided on the dam body cushion material, a drainage belt rockfill is provided below the downstream rockfill, a rear-dam water measuring weir is provided on the downstream side of the drainage belt rockfill, the dam body transition material, the upstream rockfill and the drainage belt rockfill are all made of weakly weathered rock material and the permeability coefficient must be greater than 1x10 -2 cm / s, the leakage water of the asphalt concrete panel on the dam body cushion material is collected into the water measuring weir behind the dam through the dam body cushion material, the dam body transition material, the upstream rockfill material and the drainage zone rockfill material for monitoring.

[0012] A three-dimensional composite drainage net, a reservoir bottom cushion material, and a reservoir bottom transition material are sequentially arranged below the geomembrane in the reservoir basin backfill area. The reservoir bottom backfill material is filled below the reservoir bottom transition material. The side where the reservoir bottom backfill material is connected to the dam body of the panel rockfill dam is sequentially provided with anti-filter material and dam body transition material. The reservoir bottom transition material is made of weakly weathered rock material and its permeability coefficient must be greater than 1x10 -2 cm / s, the leakage water of the geomembrane in the reservoir backfill area directly flows into the dam body of the panel rockfill dam through the three-dimensional composite drainage network, the reservoir bottom cushion material, and the reservoir bottom transition material, or flows into the dam body of the panel rockfill dam through the reservoir bottom backfill material, the filter material and the dam body transition material, and then flows to the water measuring weir behind the dam for monitoring.

[0013] A bank cushion material is arranged below the asphalt concrete panel on one side of the bank. The bank cushion material is connected to the bank concrete corridor through a drainage pipe. The leakage water of the asphalt concrete panel on one side of the bank flows into the drainage pipe through the bank cushion material and then converges into the bank concrete corridor for monitoring.

[0014] A three-dimensional composite drainage net, reservoir bottom cushion material, and drainage flower pipes are sequentially arranged below the geomembrane in the reservoir basin excavation area. Drainage pipes are connected between the drainage flower pipe and the reservoir bank concrete corridor, and between the drainage flower pipe and the reservoir bottom concrete corridor respectively. Leakage water from the geomembrane in the reservoir basin excavation area flows into the drainage flower pipe through the three-dimensional composite drainage net and the reservoir bottom cushion material, and then flows into the reservoir bank concrete corridor and the reservoir bottom concrete corridor for monitoring. The reservoir bottom concrete corridors can be densely arranged to form a corridor partition monitoring network.

[0015] Compared with the prior art, the present invention realizes the connection and fixation of the two anti-seepage bodies, the asphalt concrete panel and the geomembrane, by arranging the concrete connecting plate and the reservoir bank concrete corridor, thereby solving the problem that the concrete panel of the high dam is easily squeezed and damaged and the disadvantage that the asphalt concrete panel of the reservoir bottom on the high fill slag body is difficult to adapt to the uneven deformation, and provides a new anti-seepage solution for the projects with complex terrain and geological conditions, high dam, deep reservoir bottom and poor filling materials; by arranging the reservoir bank concrete corridor, the reservoir bottom concrete corridor and the forepool concrete corridor, a zoned monitoring system is formed, which can quickly and effectively identify the leakage defect parts of the reservoir basin to ensure the safe operation of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the planar layout structure of the present invention.

[0017] Figure 2 For the present invention Figure 1 Schematic diagram of a typical cross section in the AA direction.

[0018] Figure 3 For the present invention Figure 1 Schematic diagram of a typical cross section in the BB direction.

[0019] Figure 4 It is a schematic structural diagram of the connection between the geomembrane and the concrete connecting plate of the present invention.

[0020] Figure 5 It is a schematic structural diagram of the connection between the geomembrane and the concrete gallery of the reservoir bank of the present invention. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent elements with the same or similar functions. However, it should be understood that the drawings are only used for illustrative purposes and cannot be understood as limitations on the present invention. In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted, and the positional relationship described in the drawings is only used for illustrative purposes and cannot be understood as limitations on the present invention.

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0023] The present invention provides a half-cut and half-filled full reservoir basin anti-seepage drainage type, including an asphalt concrete panel 4 arranged along the periphery of the reservoir basin and a geomembrane 5 laid on the reservoir bottom. The asphalt concrete panel 4 on one side of the reservoir bank 2 is overlapped with the geomembrane 5 by setting a reservoir bank concrete corridor 7, and the asphalt concrete panel 4 on the panel rockfill dam 1 is overlapped with the geomembrane 5 by setting a concrete connecting plate 6.

[0024] A reservoir bottom concrete gallery 8 is arranged at the junction of the reservoir basin excavation area and the reservoir basin backfill area, and both ends of the reservoir bottom concrete gallery 8 are overlapped with the reservoir bank concrete gallery 7.

[0025] The reservoir backfill area is also provided with a forebay and a water inlet / outlet 3 , and a forebay concrete corridor 9 is provided at the junction of the forebay and the asphalt concrete panel 4 .

[0026] An arc section is provided at the bottom of the asphalt concrete panel 4 on the panel rockfill dam 1, and the concrete connecting plate 6 overlaps the arc section of the asphalt concrete panel 4 tangentially. One side of the geomembrane 5 is fixed to the concrete panel 6 by an anchoring structure 22 and then extended to the asphalt concrete panel 4 for bonding and fixing.

[0027] The bottom of the asphalt concrete panel 4 on the face rockfill dam 1 is subjected to complex forces and has large deformation. By setting a circular arc section to overlap the concrete connecting plate 6, the concrete connecting plate 6 serves as an anchoring structure for the geomembrane 5. After the geomembrane 5 is anchored, it extends to the circular arc section and is bonded to the asphalt concrete panel 4. Even if the concrete connecting plate 6 on the high fill body has cracks due to deformation, it can still ensure anti-seepage safety. In this embodiment, the radius of the arc segment is 30-50 m; the anchoring structure 22 includes an L-shaped angle steel and connecting bolts.

[0028] like Figure 4As shown, a panel geomembrane 25 is also laid on the concrete panel 4. The panel geomembrane 25 extends to the top of the geomembrane 5 and the two are welded and fixed. The panel geomembrane 25 forms a bulge at the anchoring structure 22, and the bulge is filled with plastic waterproof material.

[0029] The asphalt concrete panel 4 located on one side of the reservoir bank 2 is an inclined straight slope from bottom to bottom. The reservoir bank concrete corridor 7 is located at the bottom of the slope of the asphalt concrete panel 4. One side of the geomembrane 5 extends to the reservoir bank concrete corridor 7 and is fixed by an anchoring structure 22.

[0030] The forepool concrete corridor 9 is located below the reservoir bank concrete corridor 7, the inlet / outlet 3 is located between the forepool concrete corridor 9 and the reservoir bank concrete corridor 7, and anti-seepage concrete is poured around the inlet / outlet 3. The geomembrane 5 on one side of the forepool concrete corridor 9 is directly fixed to the reservoir bank concrete corridor 7 by an anchoring structure 22, and the leakage water of the geomembrane 5 in the forepool is collected in the forepool concrete corridor 9 for monitoring.

[0031] The dam body of the panel rockfill dam 1 is provided with upstream rockfill materials 10 and downstream rockfill materials 11 from upstream to downstream, a dam body transition material 12 is provided on the slope of the upstream rockfill material 10, a dam body cushion material 13 is provided on the dam body transition material 12, an asphalt concrete panel 4 is provided on the dam body cushion material 13, a drainage belt rockfill material 19 is provided below the downstream rockfill material 11, and a dam backwater weir 24 is provided on the downstream side of the drainage belt rockfill material 19. The dam body transition material 12, the upstream rockfill material 10 and the drainage belt rockfill material 19 are all made of weakly weathered rock materials and the permeability coefficient must be greater than 1x10-2cm / s to meet the free drainage requirements. The leakage water of the asphalt concrete panel 4 on the dam body cushion material 13 is collected into the dam backwater weir 24 through the dam body cushion material 13, the dam body transition material 12, the upstream rockfill material 10 and the drainage belt rockfill material 19 for monitoring.

[0032] The downstream rockfill 11 is located in the dry area. On the basis of meeting the requirements of dam body deformation and dam slope stability, it can be filled with all-strong weathered materials, and no requirements are made on the permeability coefficient.

[0033] A three-dimensional composite drainage net 18, a reservoir bottom cushion material 17, and a reservoir bottom transition material 16 are sequentially arranged below the geomembrane 5 in the reservoir basin backfill area. A reservoir bottom backfill material 15 is filled below the reservoir bottom transition material 16. A filter material 14 and a dam body transition material 12 are sequentially arranged on the side where the reservoir bottom backfill material 15 is connected to the dam body of the panel rockfill dam 1. The reservoir bottom transition material 16 is made of weakly weathered rock material and its permeability coefficient must be greater than 1x10-2cm / s. The seepage water of the geomembrane 5 in the reservoir basin backfill area is directly collected into the dam body of the panel rockfill dam 1 through the three-dimensional composite drainage net 18, the reservoir bottom cushion material 17, and the reservoir bottom transition material 16, or is collected into the dam body of the panel rockfill dam 1 through the reservoir bottom backfill material 15, the filter material 14 and the dam body transition material 12, and then collected to the water measuring weir 24 behind the dam for monitoring.

[0034] The reservoir bottom cushion material 17 is used as the foundation layer of the geomembrane 5. Its maximum particle size is smaller than that of the cushion material 13 (maximum particle size 8cm) and should not be greater than 2cm. The three-dimensional composite drainage net 18 is a structure of two layers of geotextile composited on the upper and lower geogrids, which has strong drainage capacity and the ability to protect the geomembrane from being punctured. The reservoir bottom backfill material 15 can be filled with all strong weathered materials, but the contact part with the panel rockfill dam 1 and the excavation and filling boundary area need to be filled with good materials for mold increase transition to avoid uneven deformation and damage caused by differences in material sources. The gradation of the filter material 14 requires the backfill material 15 to have the ability to filter and drain water to avoid the fine particles of the backfill material being carried away to form leakage damage.

[0035] A bank cushion material 21 is arranged below the asphalt concrete panel 4 on one side of the bank 2. The bank cushion material 21 is connected to the bank concrete corridor 7 through a drainage pipe 23. The leakage water of the asphalt concrete panel 4 on one side of the bank 2 flows into the drainage pipe 23 through the bank cushion material 21 and then converges into the bank concrete corridor 7 for monitoring.

[0036] A three-dimensional composite drainage net 18, a reservoir bottom cushion material 17, and a drainage flower pipe 20 are sequentially arranged below the geomembrane 5 in the reservoir basin excavation area. Drainage pipes 23 are connected between the drainage flower pipe 20 and the reservoir bank concrete corridor 7, and between the drainage flower pipe 20 and the reservoir bottom concrete corridor 8, respectively. The leakage water of the geomembrane 5 in the reservoir basin excavation area flows into the drainage flower pipe 20 through the three-dimensional composite drainage net 18 and the reservoir bottom cushion material 17, and then flows into the reservoir bank concrete corridor 7 and the reservoir bottom concrete corridor 8 for monitoring. Among them, the reservoir bottom concrete corridor 8 can be densely arranged to form a corridor partition monitoring network.

[0037] The invention provides a half-cut and half-filled full reservoir basin anti-seepage drainage type, and its construction process is as follows: The half-cut and half-fill method is adopted to excavate one side of the mountain, and the excavated materials are used to fill the face rockfill dam 1 and the reservoir basin backfill area. After excavation, filling and correction to form a regular reservoir basin, the upper anti-seepage construction is carried out; A concrete gallery 7 for the bank, a concrete gallery 8 for the bottom of the reservoir and a concrete gallery 9 for the forebay are dug and poured in the foot trough of the reservoir periphery on one side of the reservoir bank 2, and a concrete connecting plate 6 is poured at the junction of the face rockfill dam 1 and the concrete gallery 7 for the bank; Construction of asphalt concrete panels 4; The reservoir bottom geomembrane 5 is laid, and the reservoir bottom geomembrane 5 is anchored on the reservoir bank concrete gallery 7, the forebay concrete gallery 9, and the concrete connecting plate 6 by using the anchoring structure 22.

[0038] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use the half-dig and half-fill full reservoir basin anti-seepage drainage type of the present invention, and can produce the positive effects recorded in the present invention.

[0039] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internally connected between two mechanisms, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0040] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "inside", "horizontal", "end", "length", "outer end", "left", "right" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the mechanism or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. The terms "first" and "second" are also used only for simplicity of description, and do not indicate or imply relative importance.

[0041] Furthermore, in practicing the claims of the present invention, those skilled in the art can understand and effect variations to the disclosed embodiments by studying the drawings, the disclosure and the appended claims. In addition, in the claims and the specification, the words "comprise", "contain" and the like do not exclude other elements or steps, and non-plural nouns do not exclude their plural forms.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the present invention are covered by the scope of the claims of the present invention and will not be listed one by one here.

Claims

1. A half-dig and half-fill full reservoir basin anti-seepage drainage type, characterized in that: The invention comprises an asphalt concrete panel (4) arranged along the periphery of a reservoir basin and a geomembrane (5) laid on the reservoir bottom, wherein the asphalt concrete panel (4) on one side of a reservoir bank (2) is overlapped with the geomembrane (5) by arranging a reservoir bank concrete corridor (7), and the asphalt concrete panel (4) on a panel rockfill dam (1) is overlapped with the geomembrane (5) by arranging a concrete connecting plate (6).

2. A half-dig and half-fill full reservoir basin anti-seepage drainage type as claimed in claim 1, characterized in that: A reservoir bottom concrete gallery (8) is provided at the junction of the reservoir basin excavation area and the reservoir basin backfill area, and both ends of the reservoir bottom concrete gallery (8) are overlapped with the reservoir bank concrete gallery (7).

3. The half-dig and half-fill full reservoir basin anti-seepage drainage type as claimed in claim 1 is characterized in that: The reservoir backfill area is also provided with a forebay and a water inlet / outlet (3), and a forebay concrete corridor (9) is provided at the junction of the forebay and the asphalt concrete panel (4).

4. The half-dig and half-fill full reservoir basin anti-seepage drainage type as claimed in claim 1 is characterized in that: The bottom of the asphalt concrete panel (4) located on the panel rockfill dam (1) is provided with an arc section, the concrete connecting plate (6) is tangentially overlapped with the arc section of the asphalt concrete panel (4), and one side of the geomembrane (5) is fixed to the concrete panel (6) by an anchoring structure (22) and then extended to the asphalt concrete panel (4) for bonding and fixing.

5. The half-dig and half-fill full reservoir basin anti-seepage drainage type as claimed in claim 1 is characterized in that: The asphalt concrete panel (4) located on one side of the reservoir bank (2) is an inclined straight slope from one end to the other, the reservoir bank concrete gallery (7) is located at the bottom of the slope of the asphalt concrete panel (4), and one side of the geomembrane (5) is extended to the reservoir bank concrete gallery (7) and then fixed by an anchoring structure (22).

6. The half-dig and half-fill full reservoir basin anti-seepage drainage type as claimed in claim 3, characterized in that: The forebay concrete corridor (9) is located below the reservoir bank concrete corridor (7), the water inlet / outlet (3) is located between the forebay concrete corridor (9) and the reservoir bank concrete corridor (7), and the sides of the water inlet / outlet (3) are cast with anti-seepage concrete, the geomembrane (5) on one side of the forebay concrete corridor (9) is directly fixed to the reservoir bank concrete corridor (7) by an anchoring structure (22), and the leakage water of the geomembrane (5) in the forebay is collected in the forebay concrete corridor (9) for monitoring.

7. The half-dig and half-fill full reservoir basin anti-seepage drainage type as claimed in claim 1 is characterized in that: The dam body of the face rockfill dam (1) is provided with upstream rockfill materials (10) and downstream rockfill materials (11) from upstream to downstream, a dam body transition material (12) is provided on the slope of the upstream rockfill material (10), a dam body cushion material (13) is provided on the dam body transition material (12), and the asphalt concrete face plate (4) is provided on the dam body cushion material (13), a drainage belt rockfill material (19) is provided below the downstream rockfill material (11), and a rear-dam water measuring weir (24) is provided on the downstream side of the drainage belt rockfill material (19), and the dam body transition material (12), the upstream rockfill material (10) and the drainage belt rockfill material (19) are all made of weakly weathered rock materials and have a permeability coefficient greater than 1x10 -2 cm / s, the seepage water of the asphalt concrete panel (4) on the dam body cushion material (13) is collected into the post-dam water measuring weir (24) through the dam body cushion material (13), the dam body transition material (12), the upstream rockfill material (10) and the drainage zone rockfill material (19) for monitoring.

8. A half-dig and half-fill full reservoir basin anti-seepage drainage type as claimed in claim 7, characterized in that: A three-dimensional composite drainage net (18), a reservoir bottom cushion material (17), and a reservoir bottom transition material (16) are sequentially arranged below the geomembrane (5) in the reservoir basin backfill area; a reservoir bottom backfill material (15) is filled below the reservoir bottom transition material (16); a filter material (14) and a dam body transition material (12) are sequentially arranged on the side of the reservoir bottom backfill material (15) connected to the dam body of the face rockfill dam (1); the reservoir bottom transition material (16) is made of slightly weathered rock material and has a permeability coefficient greater than 1x10 -2 cm / s, the seepage water of the geomembrane (5) in the reservoir basin backfill area directly flows into the dam body of the panel rockfill dam (1) through the three-dimensional composite drainage net (18), the reservoir bottom cushion material (17), and the reservoir bottom transition material (16), or flows into the dam body of the panel rockfill dam (1) through the reservoir bottom backfill material (15), the filter material (14), and the dam body transition material (12), and then flows to the water measuring weir (24) behind the dam for monitoring.

9. The half-dig and half-fill full reservoir basin anti-seepage drainage type as claimed in claim 1, characterized in that: A bank cushion material (21) is provided below the asphalt concrete panel (4) on one side of the bank (2); the bank cushion material (21) and the bank concrete gallery (7) are connected via a drainage pipe (23); water seepage from the asphalt concrete panel (4) on one side of the bank (2) flows through the bank cushion material (21) into the drainage pipe (23) and then converges into the bank concrete gallery (7) for monitoring.

10. The half-dig and half-fill full reservoir basin anti-seepage drainage type as claimed in claim 1, characterized in that: A three-dimensional composite drainage net (18), a reservoir bottom cushion material (17), and a drainage flower pipe (20) are sequentially arranged below the geomembrane (5) in the reservoir basin excavation area. Drainage pipes (23) are respectively connected between the drainage flower pipe (20) and the reservoir bank concrete corridor (7), and between the drainage flower pipe (20) and the reservoir bottom concrete corridor (8). Leakage water from the geomembrane (5) in the reservoir basin excavation area flows through the three-dimensional composite drainage net (18) and the reservoir bottom cushion material (17) into the drainage flower pipe (20) and then flows into the reservoir bank concrete corridor (7) and the reservoir bottom concrete corridor (8) for monitoring. The reservoir bottom concrete corridor (8) can be densely arranged to form a corridor partition monitoring network.

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