Asphalt core wall rock-fill dam anti-seepage structure and using method thereof

Abstract

The invention provides an asphalt core wall rock-fill dam anti-seepage structure and a using method thereof, and relates to the technical field of hydraulic engineering equipment. Comprising an upstream rockfill layer, an upstream supporting layer, a core wall anti-seepage body, a downstream supporting layer and a downstream rockfill layer. The anti-seepage structure further comprises a self-checking assembly, and the self-checking assembly is installed on the core wall anti-seepage body and used for checking the damage condition of the anti-seepage film. According to the core-wall rock-fill dam, the self-checking assembly is arranged, in the core-wall building process, the anti-seepage films are solidified and installed on the two sides of the core wall and matched with the concrete base to form a core-wall anti-seepage body, so that the anti-seepage performance of the core-wall rock-fill dam is enhanced, meanwhile, the communicating cavities are formed in the anti-seepage films and matched with the checking pipes, and after the rock-fill dam is built, the anti-seepage performance of the core-wall rock-fill dam is improved. By checking the air tightness of the communicating cavity or the moisture content in the communicating cavity, reference data are provided for workers, the workers are assisted in judging whether the impermeable film is damaged or not, and then the workers can evaluate the performance of the core wall impermeable body conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering equipment, in particular to an anti-seepage structure of an asphalt core wall rockfill dam and a use method thereof. Background Art

[0002] A rockfill dam is a dam whose main body is filled with stones and equipped with an impermeable body. An asphalt core rockfill dam is a type of rockfill dam. The asphalt core rockfill dam uses asphalt concrete to cast the core wall impermeable body. The asphalt concrete structure has strong deformation ability, corrosion resistance, durability, and earthquake resistance, resulting in excellent performance of the constructed core rockfill dam. It is one of the best choices for super-high earth-rock dams.

[0003] In the traditional construction mode of asphalt concrete core wall rockfill dam, the asphalt concrete core wall is located inside the dam body of the rockfill dam, and the upstream and downstream are protected by the support structure, which makes the asphalt concrete core wall less likely to be damaged and cracked. Even if there is a certain degree of cracking in the asphalt concrete core wall, it can use the characteristics of its own materials to automatically heal the cracks. However, in the actual construction process, in order to further improve the performance of the core wall anti-seepage body, geotextiles and geomembranes are often used in related technologies to enhance the performance of the core wall anti-seepage body and reduce the probability of failure of the core wall anti-seepage body.

[0004] For example, a core wall rockfill dam is disclosed in the related art, and its application number is CN2020206437022. In this scheme, wire mesh gabions + geotextiles are used to replace the traditional transition zone. The wire mesh gabions are used to stabilize and protect the core wall, and the impermeability of the geomembrane is used to play a seepage-proof role, and then matched with the core wall to maintain the normal use of the rockfill dam. However, due to the limited strength of the geotextile, when the geotextile structure is damaged, the anti-seepage effect of the geotextile will fail. During the construction and subsequent long-term use, when the geotextile is subjected to external force, there is a certain probability of damage. The related technology lacks the means to inspect the geotextile in the rockfill dam, so problems cannot be discovered and remedied in time during long-term use.

[0005] In view of this, the present invention proposes an anti-seepage structure of an asphalt core wall rockfill dam and a use method thereof, so as to solve the above technical problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an asphalt core wall rockfill dam anti-seepage structure and a use method thereof, which solves the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: an asphalt core wall rockfill dam anti-seepage structure, comprising an upstream rockfill layer, an upstream supporting layer, a core wall anti-seepage body, a downstream supporting layer and a downstream rockfill layer;

[0008] The core wall anti-seepage body comprises a concrete base, a core wall body and an anti-seepage membrane;

[0009] The core wall body is built on a concrete foundation;

[0010] The anti-seepage membrane is fixedly installed on both sides of the core wall body, and the anti-seepage membrane is fixedly connected to the upstream supporting layer and the downstream supporting layer respectively;

[0011] It also includes a self-checking component, which is installed on the core wall anti-seepage body and is used to check the damage of the anti-seepage membrane;

[0012] The self-inspection component comprises a connecting cavity, an inspection tube and a sealing cover;

[0013] The self-inspection component also includes an observation tube, an extension tube is fixedly installed in the inspection tube, the extension tube extends into the connecting cavity, the extension tube is located in the connecting cavity and has evenly distributed micropores, a socket is opened on the observation tube, the extension tube is connected to the observation tube through the socket, an expansion ball is fixedly installed in the observation tube, and the inner cavity of the expansion ball is connected to the outside world.

[0014] The anti-seepage membranes are made by bonding an outer membrane and an inner membrane. The connecting cavity is a cavity located between the inner membrane and the outer membrane. An inspection tube is fixedly installed on the top of the anti-seepage membrane. The inspection tube is conductively connected to the connecting cavity. A sealing cover is detachably installed on the end of the inspection tube away from the anti-seepage membrane.

[0015] Preferably, the communicating cavities and the inspection tubes are designed in plural, and the communicating cavities and the inspection tubes correspond one to one.

[0016] Preferably, the observation tube is embedded and installed on the sealing cover. The observation tube is made of transparent material. A connecting valve is provided at one end of the observation tube away from the sealing cover. The connecting valve is used for externally connecting a vacuum pumping device. In the initial state, the connecting cavity, the inspection tube and the observation tube are all vacuumed by the vacuum pumping device.

[0017] Preferably, a water-absorbing strip is installed in the extension tube, the water-absorbing strip is made of a water-absorbing fiber material, and the water-absorbing strip is hollow.

[0018] Preferably, an observation piece is fixedly installed in the observation tube, the observation piece is made of water-absorbing color-changing resin, and the observation piece is used to assist in judging the water content in the observation tube.

[0019] Preferably, an elastic layer is fixedly installed on the side of the outer membrane away from the inner membrane, and a plurality of filling cavities are formed between the elastic layer and the outer membrane. The plurality of filling cavities are arranged at intervals along the height direction of the core wall anti-seepage body, and the plurality of filling cavities are filled with dyes of different colors.

[0020] Preferably, a plurality of filling tubes are fixedly installed in the inspection tube, the lengths of the plurality of filling tubes are increased step by step, and the filling tubes are used to pump the repair glue.

[0021] A method for using an asphalt core rockfill dam anti-seepage structure, the method comprising the following steps:

[0022] A1. Support layer construction: Use concrete blocks to build the upstream support layer and the downstream support layer according to the construction process, and pour the concrete base between the upstream support layer and the downstream support layer;

[0023] A2. Installation of anti-seepage membrane: After cleaning the surfaces of the upstream support layer and the downstream support layer close to each other, install the anti-seepage membrane and self-test components on the upstream support layer and the downstream support layer respectively;

[0024] A3. Core wall pouring: After heating and mixing the asphalt and concrete raw materials, pump them between the anti-seepage membranes and lay them in horizontal layers to form the core wall body;

[0025] A4. Long-term self-inspection: Use vacuum equipment to connect the connecting valve, then vacuum the observation tube until the vacuum degree in the observation tube reaches the preset value, check the observation tube regularly, and observe the changes in the moisture content in the observation tube;

[0026] A5. Damage repair: Determine the damaged position of the anti-seepage membrane based on the observation results of the observation tube, and then pump the liquid repair glue into the filling tube. After being guided by the filling tube, the connecting cavity in the corresponding area is bonded.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The asphalt core rockfill dam anti-seepage structure and its use method, by setting a self-inspection component, during the process of core wall construction, the anti-seepage membrane is solidified and installed on both sides of the core wall, and the core wall anti-seepage body is formed with a concrete base, so that the anti-seepage performance of the core wall rockfill dam is enhanced. At the same time, a connecting cavity is opened in the anti-seepage membrane, and an inspection pipe is matched. After the rockfill dam is built, the air tightness of the connecting cavity or the moisture content in the connecting cavity is checked, thereby providing reference materials for the staff to assist the staff in judging whether the anti-seepage membrane is damaged, so as to facilitate the staff to evaluate the performance of the core wall anti-seepage body.

[0029] 2. The asphalt core wall rockfill dam anti-seepage structure and the use method thereof make the connecting cavity, the inspection tube and the observation tube all present a negative pressure suction state. Under the action of the pressure difference, the expansion ball in the observation tube expands. In the subsequent observation stage, if the connecting cavity is damaged, the vacuum degree in the observation tube decreases abnormally under the action of the air pressure difference, and the volume of the expansion ball shrinks accordingly. Cooperating with the staff's inspection of the sealing of the equipment, the detection rate of minor damages in the connecting cavity can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a stereogram of the present invention;

[0031] Figure 2 It is an assembly diagram of the anti-seepage membrane and the self-test component in the present invention;

[0032] Figure 3 is a cross-sectional view of the anti-seepage membrane;

[0033] Figure 4 It is a cross-sectional view of the anti-seepage membrane from another perspective;

[0034] Figure 5 It is a cross-sectional view of the inspection tube, sealing cover and observation tube;

[0035] Figure 6 yes Figure 5 A partial enlarged view of the middle part;

[0036] Figure 7 is a partial cross-sectional view of the extension tube;

[0037] Figure 8 It is a flow chart of the method of the present invention.

[0038] In the figure: 1, upstream rockfill layer; 11, upstream supporting layer; 12, downstream supporting layer; 13, downstream rockfill layer; 2, concrete base; 21, core wall body; 22, anti-seepage membrane; 23, connecting cavity; 24, inspection pipe; 25, sealing cover; 26, observation pipe; 27, connecting valve; 3, extension pipe; 31, jack; 32, expansion ball; 4, water absorption strip; 41, observation piece; 5, elastic layer; 51, filling cavity; 52, filling pipe. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0041] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0043] like Figures 1 to 8 As shown, an asphalt core rockfill dam anti-seepage structure of the present invention comprises an upstream rockfill layer 1, an upstream supporting layer 11, a core wall anti-seepage body, a downstream supporting layer 12 and a downstream rockfill layer 13;

[0044] The core wall anti-seepage body comprises a concrete base 2, a core wall body 21 and an anti-seepage membrane 22;

[0045] The core wall body 21 is built on the concrete base 2;

[0046] The anti-seepage membrane 22 is fixedly installed on both sides of the core wall body 21, and the anti-seepage membrane 22 is fixedly connected to the upstream support layer 11 and the downstream support layer 12 respectively;

[0047] It also includes a self-checking component, which is installed on the core wall anti-seepage body and is used to check the damage of the anti-seepage membrane 22;

[0048] The self-test assembly comprises a connecting cavity 23, an inspection tube 24 and a sealing cover 25;

[0049] The self-test component further comprises an observation tube 26, in which an expansion ball 32 is fixedly installed, and the inner cavity of the expansion ball 32 is in communication with the outside.

[0050] The anti-seepage membrane 22 is made of an outer membrane and an inner membrane bonded together, the connecting cavity 23 is a cavity located between the inner membrane and the outer membrane, an inspection tube 24 is fixedly installed on the top of the anti-seepage membrane 22, the inspection tube 24 is conductively connected to the connecting cavity 23, and a sealing cover 25 is detachably installed on one end of the inspection tube 24 away from the anti-seepage membrane 22.

[0051] The communicating cavity 23 and the inspection tube 24 are both designed in plural, and the communicating cavity 23 and the inspection tube 24 correspond one to one.

[0052] During the construction of the asphalt concrete core wall, an anti-seepage membrane 22 is installed on both sides of the core wall body 21 to enhance the anti-seepage effect of the core wall anti-seepage body. At the same time, in order to timely obtain the damage status of the anti-seepage membrane 22, a self-inspection component is provided in the present invention to inspect the constructed anti-seepage membrane 22. During the long-term use of the rockfill dam, it is convenient for the staff to judge the performance of the core wall anti-seepage body.

[0053] Specifically, during the construction of the rockfill dam designed by the present invention, after determining the specific construction process, the staff first builds the upstream support layer 11 and the downstream support layer 12 in accordance with the guidance of the construction process. During the construction, the upstream support layer 11 and the downstream support layer 12 are preferably made of concrete blocks, and before the concrete blocks are used to build the upstream support layer 11 and the downstream support layer 12, they need to be soaked in hot asphalt, and then under the bonding effect of asphalt mortar, the concrete blocks are formed into a whole, and during the stacking process, the gaps between the upper and lower layers of the concrete blocks need to be staggered, and after each rise of a certain distance, it is necessary to lay out and measure them to ensure that the parameters of the upstream support layer 11 and the downstream support layer 12 built by the stacking meet the construction process requirements, and when the upstream support After the upstream supporting layer 11 and the downstream supporting layer 12 are built, a concrete base 2 is poured between the upstream supporting layer 11 and the downstream supporting layer 12. After the concrete base 2 is solidified, the upstream supporting layer 11 and the downstream supporting layer 12 can be cleaned on the side close to each other to remove the floating dust on the surface of the concrete blocks. Then the anti-seepage membrane 22 can be fixedly installed on the surface of the upstream supporting layer 11 and the downstream supporting layer 12. When laying the anti-seepage membrane 22, the anti-seepage membrane 22 is preferably a pre-manufactured body, which can be directly laid and adhered to the surface of the upstream supporting layer 11 or the downstream supporting layer 12. Since the connecting cavities 23 in the anti-seepage membrane 22 are multiple in design, the anti-seepage membrane 22 can be divided into multiple blocks in actual application. After the upstream or downstream supporting layer 12 is laid, the edge of the anti-seepage membrane 22 is heated to soften the edges of the two adjacent anti-seepage membranes 22 and adhere together, thereby making the anti-seepage membrane 22 integral. In this process, the inspection tube 24 is heat-cured and installed on the top of the anti-seepage membrane 22. When the anti-seepage membrane 22 is laid, the staff brushes a layer of thin asphalt on the anti-seepage membrane 22 and the concrete base 2. After the volatile solvent in the asphalt is completely evaporated, the asphalt concrete slurry prepared after stirring and heating can be pumped between the upstream supporting layer 11 and the downstream supporting layer 12 to build a core wall body 21 to form a core wall anti-seepage body. Stones are piled up on the side away from each other between the upstream supporting layer 11 and the downstream supporting layer 12 to form an upstream rockfill layer 1 and a downstream rockfill layer 13, that is, The construction process of the asphalt core rockfill dam has been preliminarily completed. During the self-inspection process during long-term use, the staff opened the sealing cover 25 on the inspection tube 24 one by one, and then vacuumed the connecting cavity 23. During the pouring and curing of the core wall body 21, the anti-seepage membrane 22 is in an extruded state, and the outer membrane and the inner membrane are in contact, so the volume of the connecting cavity 23 is relatively small. When the anti-seepage membrane 22 is partially damaged, causing water to penetrate into the connecting cavity 23, the water entering the connecting cavity 23 will be quickly pumped out during the vacuum treatment. If the anti-seepage membrane 22 is not damaged, the connecting cavity 23 will quickly lead to a preset vacuum degree. Therefore, the staff can provide a reference for judging the state of the anti-seepage membrane 22 by inspecting the connecting cavity 23 one by one.And because there are multiple communicating cavities 23, it is also convenient for the staff to narrow down the approximate range of the broken position of the anti-seepage membrane 22.

[0054] The present invention provides a self-checking component. During the construction of the core wall, the anti-seepage membrane 22 is solidified and installed on both sides of the core wall, and cooperates with the concrete base 2 to form a core wall anti-seepage body, so that the anti-seepage performance of the core wall rockfill dam is enhanced. At the same time, a connecting cavity 23 is opened in the anti-seepage membrane 22, and an inspection pipe 24 is matched. After the construction of the rockfill dam is completed, the air tightness of the connecting cavity 23 or the water content in the connecting cavity 23 is checked, thereby providing reference materials for the staff to assist the staff in judging whether the anti-seepage membrane 22 is damaged, thereby facilitating the staff to evaluate the performance of the core wall anti-seepage body.

[0055] As a preferred embodiment of the present invention, the observation tube 26 is embedded and installed on the sealing cover 25. The observation tube 26 is made of transparent material. A connecting valve 27 is opened at one end of the observation tube 26 away from the sealing cover 25. The connecting valve 27 is used for externally connecting a vacuum pumping device. In the initial state, the connecting cavity 23, the inspection tube 24 and the observation tube 26 are all vacuumed by the vacuum pumping device. An expansion ball 32 is fixedly installed in the observation tube 26, and the inner cavity of the expansion ball 32 is connected to the outside.

[0056] Since the anti-seepage membrane 22 is located between the core wall body 21 and the upstream supporting layer 11 or the downstream supporting layer 12, when the damage of the anti-seepage membrane 22 is small, the air or water flow is hindered by the upstream rockfill layer 1 and the upstream supporting layer 11 during the infiltration process, and the infiltration rate is slow. Therefore, during the negative pressure extraction process, it is easily affected by other factors, resulting in the damage of the anti-seepage membrane 22 not being discovered in time. Therefore, the present invention provides an observation tube 26, which is made of transparent material and is embedded in the sealing cover 25. When the anti-seepage membrane 22 is detected, the connecting valve 27 on the observation tube 26 is connected to the vacuum equipment, and then the observation tube 26, the inspection tube 24 and the connecting cavity 23 are subjected to vacuum treatment. As the vacuum degree gradually increases When the vacuum degree in the observation tube 26 reaches a preset value, the connecting valve 27 is disconnected from the vacuum pumping device. In the present invention, the connecting valve 27 is a one-way guide valve, which is only used to cooperate with the vacuum pumping device to vacuum the observation tube 26. When the observation tube 26 is disconnected from the vacuum pumping device, the connecting cavity 23, the inspection tube 24 and the observation tube 26 are all in a negative pressure suction state. Under the action of the pressure difference, the expansion ball 32 in the observation tube 26 expands. In the subsequent observation stage, if the connecting cavity 23 is damaged, the vacuum degree in the observation tube 26 drops abnormally under the action of the air pressure difference, and the volume of the expansion ball 32 shrinks accordingly. Cooperating with the staff's inspection of the equipment's sealing, the detection rate of minor damage to the connecting cavity 23 can be effectively improved.

[0057] An extension tube 3 is fixedly installed in the inspection tube 24 . The extension tube 3 extends into the connecting cavity 23 . The extension tube 3 is provided with evenly distributed micropores in the connecting cavity 23 . A plug hole 31 is provided on the observation tube 26 . The extension tube 3 is conductively connected to the observation tube 26 via the plug hole 31 .

[0058] When the connecting cavity 23 is evacuated by a vacuum device, the provision of the extension tube 3 can enhance the effect of extracting air or moisture in the connecting cavity 23 and reduce the probability of local blockage of the connecting cavity 23 .

[0059] A water absorbing strip 4 is installed in the extension tube 3 . The water absorbing strip 4 is made of a water absorbing fiber material and is hollow.

[0060] The setting of the water-absorbing strip 4 utilizes the characteristics of the water-absorbing fiber material of the water-absorbing strip 4 itself, so that the water that penetrates into the connecting cavity 23 can be gathered in the water-absorbing strip 4, and under the capillary action formed by the fiber gaps, the infiltrated water extends upward along the water-absorbing strip 4. Combined with the effect of negative pressure traction, it is possible to facilitate the transfer of the infiltrated water to the observation tube 26 during the inspection process.

[0061] An observation piece 41 is fixedly installed in the observation tube 26 . The observation piece 41 is made of a water-absorbing color-changing resin. The observation piece 41 is used to assist in determining the water content in the observation tube 26 .

[0062] The provision of the observation piece 41 can not only enhance the direct observation effect of water vapor, but also facilitate the staff to judge the degree of change of water vapor content in the observation piece 41, thereby providing data support for the staff to judge the degree of damage of the anti-seepage membrane 22.

[0063] As a preferred embodiment of the present invention, an elastic layer 5 is fixedly installed on the side of the outer membrane away from the inner membrane, and a plurality of filling cavities 51 are formed between the elastic layer 5 and the outer membrane. The plurality of filling cavities 51 are arranged at intervals along the height direction of the core wall anti-seepage body, and the plurality of filling cavities 51 are filled with dyes of different colors.

[0064] A plurality of filling tubes 52 are fixedly installed in the inspection tube 24 . The lengths of the plurality of filling tubes 52 are increased step by step. The filling tubes 52 are used to pump the repair glue.

[0065] After judging that the impermeable membrane 22 is damaged, when the damage degree is within the predetermined range, the permeated water contacts the dye in the filling cavity 51 during the process of passing through the elastic layer 5 and the filling cavity 51 from the outside, so that the permeated water has color. Under the action of negative pressure extraction, after the permeated water enters the observation tube 26, the color of the permeated water can provide certain data support for the staff to judge the specific height of the damage. Then, according to the judged depth, the staff pumps the repair glue from the corresponding filling tube 52. After the repair glue flows from the filling tube 52 to the corresponding depth, due to the small thickness of the connecting cavity 23, the repair glue quickly diffuses into a sheet. When the sheet-like repair glue is solidified, the corresponding The outer membrane and the inner membrane of the area are filled and fixed, and then the damaged part is filled and blocked. It should be noted that since a water absorbent strip 4 is installed in the extension tube 3, and the water absorbent strip 4 is hollow, when the repair glue contacts the extension tube 3, it is limited by the small diameter of the micropores and the obstruction of the water absorbent strip 4, resulting in that the cured repair glue can only seal the micropores on the outside of the extension tube 3, but cannot block the overall conduction of the extension tube 3. Therefore, after the local curing repair of the connecting cavity 23, the part not contacted by the repair glue can still be tested for negative pressure, thereby providing certain data support for the staff to judge the actual condition of the anti-seepage membrane 22 during the long-term use of the anti-seepage membrane 22.

[0066] A method for using an asphalt core wall rockfill dam anti-seepage structure, the method comprising the following steps:

[0067] A1. Support layer construction: Use concrete blocks to build the upstream support layer 11 and the downstream support layer 12 according to the construction process, and pour the concrete base 2 between the upstream support layer 11 and the downstream support layer 12;

[0068] A2. Installation of the anti-seepage membrane 22: After cleaning the surfaces of the upstream support layer 11 and the downstream support layer 12 close to each other, the anti-seepage membrane 22 and the self-test assembly are installed on the upstream support layer 11 and the downstream support layer 12 respectively;

[0069] A3. Core wall pouring: After heating and mixing the asphalt and concrete raw materials, pump them between the anti-seepage membrane 22 and pave them in horizontal layers to form the core wall body 21;

[0070] A4. Long-term self-inspection: Use a vacuum pumping device to connect the connecting valve 27, and then evacuate the observation tube 26 until the vacuum degree in the observation tube 26 reaches a preset value. Regularly check the observation tube 26 to observe the change in the moisture content in the observation tube 26;

[0071] A5. Damage repair: The damaged position of the anti-seepage membrane 22 is determined according to the observation result of the observation tube 26, and then the liquid repair glue is pumped into the filling tube 52. After being guided by the filling tube 52, the connecting cavity 23 of the corresponding area is bonded.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0073] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0074] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An asphalt core rockfill dam anti-seepage structure, comprising an upstream rockfill layer (1), an upstream supporting layer (11), a core wall anti-seepage body, a downstream supporting layer (12) and a downstream rockfill layer (13); Features: The core wall anti-seepage body comprises a concrete base (2), a core wall body (21) and an anti-seepage membrane (22); The core wall body (21) is built on a concrete base (2); The anti-seepage membrane (22) is fixedly installed on both sides of the core wall body (21), and the anti-seepage membrane (22) is fixedly connected to the upstream supporting layer (11) and the downstream supporting layer (12) respectively; It also includes a self-checking component, which is installed on the core wall anti-seepage body and is used to check the damage of the anti-seepage membrane (22); The self-test component comprises a communication cavity (23), an inspection tube (24) and a sealing cover (25); The anti-seepage membrane (22) is made of an outer membrane and an inner membrane bonded together, the communication cavity (23) is a cavity located between the inner membrane and the outer membrane, an inspection tube (24) is fixedly installed on the top of the anti-seepage membrane (22), the inspection tube (24) is conductively connected to the communication cavity (23), and a sealing cover (25) is detachably installed on one end of the inspection tube (24) away from the anti-seepage membrane (22); The self-inspection component also includes an observation tube (26), an extension tube (3) is fixedly installed in the inspection tube (24), the extension tube (3) extends into the connecting cavity (23), the extension tube (3) is located in the connecting cavity (23) and is provided with uniformly distributed micropores, a plug hole (31) is provided on the observation tube (26), the extension tube (3) is conductively connected to the observation tube (26) through the plug hole (31), an expansion ball (32) is fixedly installed in the observation tube (26), and the inner cavity of the expansion ball (32) is filled with nitrogen.

2. The asphalt core rockfill dam anti-seepage structure according to claim 1, characterized in that: The communicating cavities (23) and the inspection tubes (24) are both designed in plural numbers, and the communicating cavities (23) and the inspection tubes (24) correspond one to one.

3. The asphalt core rockfill dam anti-seepage structure according to claim 2, characterized in that: The observation tube (26) is mounted on the sealing cover (25). The observation tube (26) is made of a transparent material. A connecting valve (27) is provided at one end of the observation tube (26) away from the sealing cover (25). The connecting valve (27) is used to connect to an external vacuum pumping device. In an initial state, the connecting cavity (23), the inspection tube (24) and the observation tube (26) are all vacuumed by the vacuum pumping device.

4. The asphalt core rockfill dam anti-seepage structure according to claim 3, characterized in that: A water absorbing strip (4) is installed in the extension tube (3); the water absorbing strip (4) is made of a water absorbing fiber material; and the water absorbing strip (4) is hollow.

5. The asphalt core rockfill dam anti-seepage structure according to claim 2 or 4, characterized in that: An observation piece (41) is fixedly installed in the observation tube (26). The observation piece (41) is made of a water-absorbing color-changing resin. The observation piece (41) is used to assist in determining the water content in the observation tube (26).

6. The asphalt core rockfill dam anti-seepage structure according to claim 5, characterized in that: An elastic layer (5) is fixedly mounted on the side of the outer membrane away from the inner membrane, and a plurality of filling cavities (51) are formed between the elastic layer (5) and the outer membrane. The plurality of filling cavities (51) are arranged at intervals along the height direction of the core wall anti-seepage body, and the plurality of filling cavities (51) are filled with dyes of different colors.

7. The asphalt core rockfill dam anti-seepage structure according to claim 6, characterized in that: A plurality of filling pipes (52) are fixedly installed in the inspection pipe (24), the lengths of the plurality of filling pipes (52) increasing step by step, and the filling pipes (52) are used to pump repair glue.

8. A method for using an asphalt core rockfill dam anti-seepage structure, characterized in that: The method uses the asphalt core rockfill dam anti-seepage structure according to claim 7, and the method comprises the following steps: A1. Support layer construction: using concrete blocks to construct an upstream support layer (11) and a downstream support layer (12) according to the construction process, and pouring a concrete base (2) between the upstream support layer (11) and the downstream support layer (12); A2. Installation of the anti-seepage membrane (22): After cleaning the surfaces of the upstream supporting layer (11) and the downstream supporting layer (12) close to each other, the anti-seepage membrane (22) and the self-test component are installed on the upstream supporting layer (11) and the downstream supporting layer (12) respectively; A3. Core wall pouring: After heating and mixing the asphalt and concrete raw materials, they are laid between the anti-seepage membrane (22) and laid in horizontal layers to form the core wall body (21); A4. Long-term self-inspection: A vacuum device is connected to the connecting valve (27), and then the observation tube (26) is vacuumed until the vacuum degree in the observation tube (26) reaches a preset value. The observation tube (26) is checked regularly to observe the change of the moisture content in the observation tube (26); A5. Damage repair: The damaged position of the anti-seepage membrane (22) is determined based on the observation result of the observation tube (26), and then the liquid repair glue is pumped into the filling tube (52). After being guided by the filling tube (52), the connecting cavity (23) of the corresponding area is bonded.

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