A diaphragm wall and composite geomembrane connecting structure for reservoir dam body

Abstract

The present application relates to reservoir dam body cut-off wall technical field, especially in a kind of cut-off wall and composite geomembrane connecting structure for reservoir dam body, including installation slot being opened in the upper end of cut-off wall, installation slot is U-shaped structure, and the upper end of installation slot bottom wall is fixedly provided with compression protrusion;The cut-off wall and composite geomembrane connecting structure for reservoir dam body further includes compensation unit, and the compensation unit is provided with multiple and symmetrically divided into two rows.The clamping portion of the present application is matched with the limiting unit, can realize triangular support fixing, and further realize the function of self-limiting, directly press the composite geomembrane directly in cut-off wall, and without cut-off wall punching and bolt installation and other cumbersome procedures, reduce the difficulty and labor input of composite geomembrane and cut-off wall connection, simultaneously without punching treatment to composite geomembrane, maintain its complete structure, improve the tear resistance of composite geomembrane.

Description

Technical Field

[0001] This invention relates to the field of anti-seepage wall technology for reservoir dams, and particularly to an anti-seepage wall and composite geomembrane connection structure for reservoir dams. Background Technology

[0002] As the core structure of water conservancy projects, the seepage prevention performance of reservoir dams directly determines the safety of dams and the efficiency of water resource utilization. As a key barrier to seepage prevention in dams, the cutoff wall needs to work in conjunction with the composite geomembrane. The composite geomembrane covers the dam slope and its ends are connected to the upper end of the cutoff wall to form an integrated seepage prevention system of the cutoff wall and the composite geomembrane.

[0003] Existing methods for connecting seepage barriers to composite geomembranes typically employ rigid connectors such as bolts and rivets, requiring drilling into the geomembrane and compromising its original structural integrity. Localized stress concentrations easily form at the contact points between the connectors and the geomembrane, leading to tearing at the drilled or contact areas during slight dam deformation, resulting in seepage failure. Furthermore, connecting composite geomembranes with bolts and rivets requires extensive manual tightening, increasing labor input. Additionally, reservoir dams are subject to long-term water and soil pressure and groundwater level fluctuations, making them prone to uneven settlement. Existing connection structures are mostly rigid designs without elastic compensation mechanisms; when the dam settles, the composite geomembrane is forcibly stretched, and if the stretch exceeds its ultimate elongation rate, it can lead to tearing.

[0004] Therefore, there is an urgent need to provide a connection structure that can improve the connection efficiency between composite geomembrane and impermeable wall and can compensate for settlement. Summary of the Invention

[0005] Therefore, it is necessary to provide a connection structure between a seepage barrier wall and a composite geomembrane for a reservoir dam, which aims to solve the problems of settlement compensation and cumbersome construction when connecting the existing composite geomembrane and the seepage barrier wall.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a connection structure between a seepage barrier wall and a composite geomembrane for a reservoir dam, comprising: an installation groove formed on the upper end of the seepage barrier wall, the installation groove having a U-shaped structure, and a pressing protrusion fixedly provided on the upper end of the bottom wall of the installation groove.

[0007] The anti-seepage wall and composite geomembrane connection structure used for reservoir dams also includes a compensation unit. Multiple compensation units are provided and are symmetrically arranged in two rows. Each compensation unit includes a limiting plate pre-embedded in the vertical side wall of the installation groove. The limiting plate is connected to a locking part and at least one compensation part from bottom to top on the side near the middle of the installation groove.

[0008] The anti-seepage wall and composite geomembrane connection structure for reservoir dams also includes a limiting unit. Multiple limiting units are provided and installed in the installation groove. Each limiting unit includes a bottom pressure part provided on the bottom wall of the installation groove. Both sides of the bottom pressure part are hinged with side pressure parts. Multiple positioning parts are hinged to the opposite ends of the two side pressure parts. The multiple positioning parts on both sides are staggered.

[0009] The side pressure part includes a side pressure plate hinged to the bottom pressure part. The side pressure plate is provided with multiple limiting protrusions with the protrusions facing away from the limiting plate. The lowest limiting protrusion cooperates with the locking part, and the remaining limiting protrusions cooperate with the corresponding compensation part.

[0010] The seepage prevention wall and composite geomembrane connection structure used for reservoir dams also includes connection units, of which multiple units are provided and are respectively connected between two bottom pressure parts.

[0011] After the composite geomembrane is laid in the installation trench, the bottom pressure part and the side pressure part are moved into the trench to press and limit it. The limiting protrusion and the locking part cooperate to fix the position of the bottom pressure part and the side pressure part. The compensation part retains the reserved amount of composite geomembrane to cope with the settlement gap of the seepage prevention wall.

[0012] Preferably, the locking part includes a locking groove formed on the lower side of the limiting plate, and a positioning protrusion plate is installed at one end of the locking groove near the middle of the mounting groove. The positioning protrusion plate cooperates with the lowermost limiting protrusion.

[0013] Preferably, the compensation part includes a connecting groove formed on the limiting plate, a rubber plate is installed on the vertical section of the connecting groove, a compensation protrusion is installed at one end of the rubber plate near the middle of the mounting groove, the compensation protrusion is slidably connected to the connecting groove, and the compensation protrusion cooperates with the corresponding limiting protrusion.

[0014] Preferably, the bottom pressure part includes a bottom pressure plate that covers the upper end of the bottom wall of the mounting groove. The bottom pressure plate is hinged to the side pressure plate. A bottom pressure protrusion is provided in the middle of the bottom pressure plate. Multiple connecting through holes are provided on both sides of the bottom pressure protrusion. Two screws are symmetrically installed at the upper end of the bottom pressure protrusion.

[0015] Preferably, the side pressure part further includes a plurality of reinforcing through holes opened near the lower side of the side pressure plate, and a pushing protrusion is installed on the side of the side pressure plate near the positioning protrusion plate, the pushing protrusion being located between the two lowest limiting protrusions.

[0016] Preferably, the positioning part includes a hinge frame installed at the upper end of the side pressure plate, a positioning plate is hinged on the hinge frame, a baffle is installed at the end of the positioning plate away from the hinge frame, and multiple reinforcing holes are provided on the positioning plate.

[0017] Preferably, the connecting unit includes a connecting plate that is simultaneously connected to two screws on two adjacent bottom pressure plates. A stop bar is provided above the connecting plate, and two threaded sleeves are rotatably connected to the stop bar. The threaded sleeves are threadedly connected to the screws. A retaining ring is installed on the outer ring surface of the threaded sleeve near the upper end. The stop bar abuts against at least two positioning plates above the same bottom pressure plate.

[0018] Preferably, the positioning plate, the bottom pressure plate, and the side pressure plate form a stable triangular structure.

[0019] Preferably, the positioning plate is composed of a first plate and a second plate hinged together. The second plate is provided with two rectangular partition blocks at one end near the hinge, and the partition blocks are provided with arc-shaped rounded corners on the side near the rotation direction of the second plate.

[0020] In summary, the present invention has the following beneficial technical effects: 1. The locking part and the limiting unit adopted in the present invention can achieve triangular support and fixation, thereby realizing the self-limiting function, directly pressing and limiting the composite geomembrane inside the seepage barrier wall, without the need for cumbersome procedures such as drilling holes and bolt installation on the seepage barrier wall, reducing the difficulty of connecting the composite geomembrane and the seepage barrier wall and the labor input, while eliminating the need for drilling holes in the composite geomembrane, maintaining its complete structure, and improving the tear resistance of the composite geomembrane.

[0021] 2. The compensation part and the limiting unit used in this invention can be combined to compress the compensation part and slide relative to the lateral pressure part when the anti-seepage wall settles. The sliding composite geomembrane fills the settlement gap, effectively preventing the composite geomembrane from being torn due to settlement, and at the same time compensating for the settlement. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown.

[0024] Figure 2 It shows Figure 1 A magnified view of region A in the middle.

[0025] Figure 3 A front view of the present invention is shown.

[0026] Figure 4 A left view of the invention is shown.

[0027] Figure 5 It shows Figure 3 A cross-sectional view of BB.

[0028] Figure 6 A schematic cross-sectional view of the limiting plate, locking part and compensation part of this invention is shown.

[0029] Figure 7 A schematic diagram of the limiting unit of the present invention is shown.

[0030] Figure 8 A schematic diagram of the positioning part of the present invention is shown.

[0031] Figure 9 A schematic diagram showing the connection between some of the limiting units and the connecting units of the present invention is shown.

[0032] Figure 10 The diagram shows the working state of the composite geomembrane when the impermeable wall is settling.

[0033] Figure 11 The diagram shows the working state of the composite geomembrane during the settlement of the seepage barrier wall.

[0034] The above-mentioned figures include the following reference numerals: 1. Mounting groove; 10. Pressing protrusion; 2. Compensation unit; 20. Limiting plate; 21. Locking part; 210. Locking groove; 211. Positioning protrusion plate; 22. Compensation part; 220. Connecting groove; 221. Rubber plate; 222. Compensation protrusion; 3. Limiting unit; 30. Bottom pressure part; 300. Bottom pressure plate; 301. Bottom pressure protrusion; 302. Connecting through hole; 303. Screw; 31. Side pressure part; 310. Side pressure plate; 311. Limiting protrusion; 312. Reinforcing through hole; 313. Pushing protrusion; 32. Positioning part; 320. Hinge frame; 321. Positioning plate; 322. Baffle; 323. Reinforcing hole; 4. Connecting unit; 40. Connecting plate; 41. Stop bar; 42. Threaded sleeve. Detailed Implementation

[0035] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] See Figure 1 and Figure 2 A connection structure between a seepage barrier wall and a composite geomembrane for a reservoir dam includes an installation groove 1 formed on the upper part of the seepage barrier wall. The installation groove 1 has a U-shaped structure, and a pressing protrusion 10 is fixedly provided on the upper part of the bottom wall of the installation groove 1.

[0037] See Figures 2-4 The seepage prevention wall and composite geomembrane connection structure used for reservoir dams also includes multiple compensation units 2 symmetrically divided into two rows.

[0038] In practice, the anti-seepage wall is cast and shaped according to the construction drawings. During the casting of the anti-seepage wall, an installation groove 1 needs to be reserved. Multiple compensation units 2, which are prefabricated from the factory, need to be embedded in the two vertical side walls of the installation groove 1. The multiple compensation units 2 on each vertical side wall are attached to each other. After the anti-seepage wall is cast, the installation groove 1, the existing slope anti-slip groove and the existing dam slope are cleaned according to the requirements of the composite geomembrane laying. After the slope flatness meets the requirements, multiple rolls of composite geomembrane are rolled from top to bottom. The overlap between the multiple rolls of composite geomembrane is connected by hot-melt welding. When laying the multiple overlapping composite geomembranes, they pass through the installation groove 1 and are laid in the installation groove 1. The composite geomembrane covers the multiple compensation units 2.

[0039] See Figure 1 , Figure 2 , Figure 5 and Figure 7 The anti-seepage wall and composite geomembrane connection structure for reservoir dam also includes multiple limiting units 3 set in the installation groove 1. The limiting unit 3 includes a bottom pressure part 30 set on the bottom wall of the installation groove 1. The bottom pressure part 30 includes a bottom pressure plate 300 covering the upper end of the bottom wall of the installation groove 1. A bottom pressure protrusion 301 is provided in the middle of the bottom pressure plate 300. Multiple connecting through holes 302 are provided on both sides of the bottom pressure protrusion 301.

[0040] In practice, after the composite geomembrane is laid in the installation groove 1, the bottom pressure plate 300 is placed over the top of the composite geomembrane in the installation groove 1. The bottom pressure plate 300 presses the composite geomembrane against the top of the bottom wall of the installation groove 1. At the same time, the bottom pressure protrusion 301 presses the composite geomembrane against the top of the pressing protrusion 10, thereby performing stepped pressing of the composite geomembrane and improving the limiting effect of the bottom pressure plate 300 on the composite geomembrane. Meanwhile, the pressing protrusion 10 and the bottom pressure protrusion 301 cooperate to guide and position the placement of the bottom pressure plate 300, ensuring the accuracy of the placement of the bottom pressure plate 300. An anti-slip mat (not shown in the figure) can be laid on the pressing surface of the bottom pressure plate 300 to further increase the limiting effect of the bottom pressure plate 300 on the composite geomembrane.

[0041] See Figure 2 , Figure 5 and Figure 6 The compensation unit 2 includes a limiting plate 20 pre-embedded in the vertical side wall of the mounting groove 1. The limiting plate 20 is connected from bottom to top to a locking part 21 and two compensation parts 22 on the side near the middle of the mounting groove 1.

[0042] See Figure 6 The locking part 21 includes a locking groove 210 opened on the lower side of the limiting plate 20, and a positioning protrusion 211 is installed at one end of the locking groove 210 near the middle of the mounting groove 1.

[0043] See Figure 2 , Figure 5 , Figure 7 and Figure 9 Both sides of the bottom pressure part 30 are hinged with side pressure parts 31. The side pressure part 31 includes a side pressure plate 310 hinged to the bottom pressure part 30. The bottom pressure plate 300 is hinged to the side pressure plate 310. The side pressure plate 310 is provided with a plurality of limiting protrusions 311 and the protrusion direction is away from the limiting plate 20. The positioning protrusion plate 211 cooperates with the lowermost limiting protrusion 311. The side pressure part 31 also includes a plurality of reinforcing through holes 312 opened near the lower side of the side pressure plate 310. A pushing protrusion 313 is installed on the side of the side pressure plate 310 near the positioning protrusion plate 211. The pushing protrusion 313 is located between the two lowermost limiting protrusions 311.

[0044] In practical operation, during the installation of the bottom pressure plate 300, both side pressure plates 310 can rotate around the hinge of the bottom pressure plate 300, thus facilitating the bottom pressure plate 300 to tilt into the installation groove 1 during installation. After passing the positioning protrusions 211, the bottom pressure plate 300 can rotate to a horizontal state, avoiding the positioning protrusions 211 on both sides from affecting the installation of the bottom pressure plate 300. After the bottom pressure plate 300 presses the composite geomembrane onto the bottom wall of the installation groove 1, the two side pressure plates 310 are rotated sequentially towards the corresponding limiting plates 20 on both sides, pressing the composite geomembrane onto the vertical side wall of the installation groove 1, thereby achieving vertical side pressure on the installation groove 1. The composite geomembrane on the wall has a limiting function. At the same time, the side pressure plate 310 drives multiple limiting protrusions 311 to cooperate with the corresponding locking part 21 and two compensation parts 22. The compensation part 22 retains the reserved amount of composite geomembrane to cope with the settlement gap of the seepage prevention wall. The lowermost limiting protrusion 311 presses the composite geomembrane on the vertical side wall of the installation groove 1 onto the positioning protrusion plate 211. Since both the positioning protrusion plate 211 and the limiting protrusion 311 are arc-shaped structures and the pushing protrusion 313 increases the contact area between the composite geomembrane and the positioning protrusion plate 211, the effect of the side pressure plate 310 in pressing and limiting the composite geomembrane is further increased.

[0045] See Figure 2 and Figure 7 Each of the two side pressing parts 31 is hinged to a plurality of positioning parts 32 at its opposite ends, and the plurality of positioning parts 32 on both sides are staggered.

[0046] See Figure 2 , Figure 5 , Figure 7 and Figure 9The positioning part 32 includes a hinge frame 320 installed at the upper end of the side pressure plate 310. A positioning plate 321 is hinged on the hinge frame 320. A baffle 322 is installed at the end of the positioning plate 321 away from the hinge frame 320. A plurality of reinforcing holes 323 are provided on the positioning plate 321.

[0047] See Figure 8 The positioning plate 321 is composed of a first plate and a second plate hinged together. The second plate is provided with two rectangular partition blocks at one end near the hinge. The partition blocks are provided with arc-shaped rounded corners on the side near the rotation direction of the second plate.

[0048] In the initial state, the positioning plate 321 is bent, providing operational space for the rotation of the side pressure plate 310. After the side pressure plates 310 on both sides have pressed the composite geomembrane against the vertical sidewall of the installation groove 1, the multiple positioning plates 321 on the two side pressure plates 310 are rotated in sequence. The positioning plates 321 rotate around the hinge frame 320, simultaneously rotating plate one and plate two to the same plane. At this time, the positioning plate 321 is in a straight state, and the straight segment of the partition block on plate two is aligned with... The end of plate one fits into place, limiting the rotation range of plate two and preventing excessive rotation of plate two from causing the positioning plate 321 to return to a bent state. The straight positioning plate 321, along with the baffle 322, abuts against the hinge point between the side pressure plate 310 and the bottom pressure plate 300. The positioning plate 321, the bottom pressure plate 300, and the side pressure plate 310 form a stable triangular structure, effectively limiting the rotation of the side pressure plate 310. Simultaneously, the positioning plate 321, through the baffle 322, controls the other... The side pressure plate 310 provides limiting, and multiple positioning plates 321 are staggered between the two side pressure plates 310, effectively providing multi-point support for the side pressure plates 310. The support functions are independent of each other, effectively avoiding mutual interference between the multiple positioning plates 321, and improving the strength of the support provided by the multiple positioning plates 321 to the two side pressure plates 310. The limiting protrusions 311 on the two supported side pressure plates 310 cooperate with the positioning protrusions 211 to realize the function of snapping the two side pressure plates 310 and the bottom pressure plate 300 into the installation groove 1. It does not require connection and fixation through existing bolts or other connectors, so there is no need to drill holes in the composite geomembrane, ensuring that the composite geomembrane is in an intact state and ensuring the tear resistance of the composite geomembrane. The two side pressure plates 310 and the bottom pressure plate 300 simultaneously compress and limit the composite geomembrane from multiple directions, ensuring the connection strength between the composite geomembrane and the seepage barrier wall. Moreover, the installation operation is simple and convenient, reducing labor input and lowering labor costs.

[0049] Repeat the previous steps of installing the limiting unit 3 and limiting the composite geomembrane to complete the installation of multiple limiting units 3.

[0050] See Figure 2 , Figure 5 and Figure 6The compensation part 22 includes a connecting groove 220 formed on the limiting plate 20. A rubber plate 221 is installed on the vertical section of the connecting groove 220. A compensation protrusion 222 is installed at one end of the rubber plate 221 near the middle of the mounting groove 1. The compensation protrusion 222 is slidably connected to the connecting groove 220. The compensation protrusion 222 cooperates with the corresponding limiting protrusion 311.

[0051] In practice, while the side pressure plate 310 presses the composite geomembrane against the vertical sidewall of the installation groove 1, the side pressure plate 310 drives the corresponding limiting protrusion 311 to press the composite geomembrane onto the compensating protrusion 222. The protruding end of the compensating protrusion 222 has an arc-shaped structure. At this time, the composite geomembrane is in a relaxed state, which ensures that the composite geomembrane fits the compensating protrusion 222 along its shape. At this time, the composite geomembrane does not compress the compensating protrusion 222 and the rubber plate 221. An anti-slip mat (not shown in the figure) can be laid on the pressing surface of the side pressure plate 310 below the compensating protrusion 222 to further increase the limiting effect of the side pressure plate 310 on the composite geomembrane located below the compensating protrusion 222. A sealing gasket (not shown in the figure) with a thickness smaller than the anti-slip pad is provided on the pressing surface of the compensating protrusion 222 and the side pressure plate 310 above it. This allows the composite geomembrane on the compensating protrusion 222 and the side pressure plate 310 to be in contact with the pressing surface but can slide relative to each other under force. When the seepage barrier wall settles, the composite geomembrane slides against the upper side of the side pressure plate 310 under force, pulling the bent composite geomembrane at the compensating protrusion 222. The bent composite geomembrane gradually straightens and pushes the compensating protrusion 222. The compensating protrusion 222 compresses the rubber plate 221 under force. The connecting groove 220 provides space for the bending and deformation of the rubber plate 221, thereby realizing the function of compensating for the settlement gap of the seepage barrier wall (e.g., Figure 10 (As shown).

[0052] See Figure 1 , Figure 5 and Figure 9 The seepage prevention wall and composite geomembrane connection structure used for reservoir dams also includes multiple connection units 4 that are respectively connected between two bottom pressure parts 30.

[0053] See Figure 1 , Figure 5 and Figure 9 Two screws 303 are symmetrically installed on the upper end of the bottom pressure protrusion 301. The connecting unit 4 includes a connecting plate 40 that is simultaneously sleeved and connected to the two screws 303 on the two adjacent bottom pressure plates 300. A stop bar 41 is provided above the connecting plate 40. Two threaded sleeves 42 are rotatably connected to the stop bar 41. The threaded sleeves 42 are threadedly connected to the screws 303. A retaining ring is installed on the outer ring surface of the threaded sleeve 42 near the upper end. The stop bar 41 abuts against two positioning plates 321 above the same bottom pressure plate 300.

[0054] In practice, after the multiple base plates 300 are installed, multiple connecting plates 40 are sequentially fitted onto the two screws 303 on two adjacent base plates 300. Then, multiple stop rods 41 are moved above the corresponding connecting plates 40, and the corresponding threaded sleeves 42 are inserted through the stop rods 41 and rotated. The threaded sleeves 42 are threadedly connected to the corresponding screws 303 until the retaining ring on the threaded sleeve 42 is tightly against the upper end of the stop rod 41 and the lower end of the threaded sleeve 42 is tightly against the upper end of the connecting plate 40. This simultaneously achieves the function of limiting the connecting plate 40 and the stop rods 41. The stop rods 41 limit the four straight positioning plates 321 above the two adjacent base plates 300, preventing the positioning plates 321 from bending. This further improves the connection strength between the limiting unit 3 and the mounting groove 1. The connecting plate 40 is used to connect two base plates 300, improving the overall integrity between the multiple base plates 300 and thus improving the installation strength of the multiple base plates 300.

[0055] After the multiple connecting units 4 are installed, the existing fine concrete mortar is poured into the installation groove 1 until it is full. The fine concrete mortar fills the multiple connecting through holes 302, multiple reinforcing through holes 312, and multiple reinforcing holes 323. After the fine concrete mortar solidifies, it effectively increases the strength of its connection with the limiting unit 3 and further limits the limiting unit 3. The fine concrete mortar is simultaneously connected to both ends of the installation groove 1 (not shown in the figure). It should be noted that the upper end of the side pressure plate 310 is at the same height as the upper end of the anti-seepage wall. The fine concrete mortar is not connected to the composite geomembrane above the compensation part 22, which facilitates the relative movement of the composite geomembrane with the upper part of the side pressure plate 310 when the anti-seepage wall settles, ensuring that the settlement compensation function can be realized (e.g., Figure 11 As shown in the figure, after the concrete fine mortar has completely solidified, the connection between the seepage barrier wall and the composite geomembrane is completed.

[0056] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A seepage barrier wall and composite geomembrane connection structure for a reservoir dam, characterized in that: This includes an installation groove opened at the top of the anti-seepage wall, with a pressing protrusion fixedly installed at the upper end of the bottom wall of the installation groove; The compensation unit is provided in multiple symmetrical rows. Each compensation unit includes a limiting plate embedded in the vertical sidewall of the mounting groove. The limiting plate is connected from bottom to top to a locking part and at least one compensation part on the side of the limiting plate near the middle of the mounting groove. The limiting unit is provided in multiple units and is installed in the mounting groove. The limiting unit includes a bottom pressure part provided on the bottom wall of the mounting groove, and side pressure parts are hinged to both sides of the bottom pressure part. Multiple positioning parts are hinged to the opposite ends of the two side pressure parts. The side pressure part includes a side pressure plate hinged to the bottom pressure part. The side pressure plate is provided with multiple limiting protrusions with the protrusions facing away from the limiting plate. The lowest limiting protrusion cooperates with the locking part, and the remaining limiting protrusions cooperate with the corresponding compensation part. Multiple connecting units are provided, each connected between two bottom pressure parts; After the composite geomembrane is laid in the installation trench, the bottom pressure part and the side pressure part are moved into the trench to press and limit it. The limiting protrusion and the locking part cooperate to fix the position of the bottom pressure part and the side pressure part. The compensation part retains the reserved amount of composite geomembrane to cope with the settlement gap of the seepage prevention wall. The bottom pressure part includes a bottom pressure plate that covers the upper end of the bottom wall of the mounting groove. A bottom pressure protrusion is provided in the middle of the bottom pressure plate, and two screws are symmetrically installed at the upper end of the bottom pressure protrusion. The positioning part includes a hinge frame installed at the upper end of the side pressure plate, a positioning plate hinged on the hinge frame, a baffle installed at the end of the positioning plate away from the hinge frame, and multiple reinforcing holes opened on the positioning plate. The connecting unit includes a connecting plate that is simultaneously connected to two screws on two adjacent bottom pressure plates. A stop bar is provided above the connecting plate, and two threaded sleeves are rotatably connected to the stop bar. The threaded sleeves are threadedly connected to the screws. A retaining ring is installed on the outer ring surface of the threaded sleeve near the upper end. The stop bar abuts against at least two positioning plates above the same bottom pressure plate.

2. The seepage prevention wall and composite geomembrane connection structure for a reservoir dam as described in claim 1, characterized in that: The locking part includes a locking groove opened near the lower side of the limiting plate. A positioning protrusion is installed at one end of the locking groove near the middle of the mounting groove. The positioning protrusion cooperates with the lowermost limiting protrusion.

3. The seepage prevention wall and composite geomembrane connection structure for a reservoir dam as described in claim 1, characterized in that: The compensation part includes a connecting groove formed on the limiting plate. A rubber plate is installed on the vertical section of the connecting groove. A compensation protrusion is installed at one end of the rubber plate near the middle of the mounting groove. The compensation protrusion is slidably connected to the connecting groove and cooperates with the corresponding limiting protrusion.

4. The seepage prevention wall and composite geomembrane connection structure for a reservoir dam as described in claim 1, characterized in that: The bottom pressure plate is hinged to the side pressure plate, and multiple connecting through holes are provided on both sides of the bottom pressure protrusion.

5. The seepage prevention wall and composite geomembrane connection structure for a reservoir dam as described in claim 1, characterized in that: The side pressure part also includes multiple reinforcing through holes opened near the lower side of the side pressure plate, and a push protrusion is installed on the side of the side pressure plate near the positioning protrusion plate, with the push protrusion located between the two lowest limiting protrusions.

6. The seepage prevention wall and composite geomembrane connection structure for a reservoir dam as described in claim 4, characterized in that: The positioning plate, bottom pressure plate, and side pressure plate form a stable triangular structure.

7. The seepage prevention wall and composite geomembrane connection structure for a reservoir dam as described in claim 4, characterized in that: The positioning plate is composed of a first plate and a second plate hinged together. Two rectangular partition blocks are provided at one end of the second plate near the hinge. The partition blocks have rounded corners on the side near the rotation direction of the second plate.

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