An earth and rock dam seepage prevention and water stopping structure

Abstract

The application belongs to the technical field of earth-rock dams, and discloses a seepage-proof and water-stopping structure of an earth-rock dam, which comprises a weakly weathered foundation and a strongly weathered foundation, the top of the strongly weathered foundation is provided with a rockfill layer, and the middle of the rockfill layer is provided with a core wall. The metal pipe is sleeved in the concrete pile, the side pipe in annular distribution is fixed to the outer surface of the metal pipe, the filter core sleeve is additionally arranged in the metal pipe, the suction box at the top of the core wall is matched, the suction inside the communication frame is realized, the air in the inner pipe is sucked through the communication pipe, in the case that the air pressure in the inner pipe is reduced, the air in the core wall is sucked into the side pipe and then into the inner pipe through the filter core sleeve and the filter hole, the clay is gradually adsorbed and gathered, the internal density of the core wall is increased, the permeation caused by the density reduction due to relaxation is avoided, and the core wall can still have good seepage-proof and water-stopping effect after being used for a certain period of time.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of earth-rock dams, and particularly relates to an earth-rock dam anti-seepage and water-stopping structure. BACKGROUND

[0002] The earth-rock dam refers to a dam made of local soil, stone or mixed materials through methods such as throwing and rolling. When the dam body material is mainly soil and gravel, it is called an earth dam, when it is mainly stone, gravel and blasting stone, it is called a rockfill dam, and when both types of local materials are in a considerable proportion, it is called a soil-rock mixed dam. The earth-rock dam is the dam type with the longest history. The dam building technology of the earth-rock dam has been developed since the 1950s of the 20th century, and has promoted the construction of a large number of high dams. The earth-rock dam is the most widely used and fastest developed dam type in the world dam engineering construction.

[0003] In the prior art, the earth-rock dam anti-seepage and water-stopping structure usually uses clay with extremely small water permeability as an anti-seepage body, and forms a core wall inside the earth-rock dam, so as to realize the anti-seepage and water-stopping of the earth-rock dam by using the core wall. However, in actual use, under the action of the upstream water pressure, the core wall actually located in the middle of the earth-rock dam is prone to collapse of the thrust force in the downstream direction, so that the core wall tilts towards the downstream direction and appears to be loose in the downstream position of the core wall. After the loose side of the core wall appears, the density of the anti-seepage clay actually constituting the core wall is reduced, so that the final water permeability resistance performance is gradually weakened. After being used for a period of time, the actual anti-seepage and water-stopping effect of the earth-rock dam is reduced, and the actual use performance is reduced.

[0004] In addition, in the prior art, in order to strengthen the actual anti-seepage and water-stopping effect, a concrete anti-seepage wall is usually installed at the bottom of the dam foundation, and the concrete anti-seepage wall arranged vertically in the middle is used to realize the anti-seepage and water-stopping at the dam foundation. However, under the continuous impact action of the crustal movement and the actual water flow, the left and right lateral separation forces appear at the dam foundation of the earth-rock dam, and under the action of the separation thrust, the concrete anti-seepage wall arranged in the middle appears cracks, and even appears to be broken and collapsed. The application stability of the actual concrete anti-seepage wall is poor, the anti-seepage effect is obviously weakened after a certain period of time, and the use effect is poor. SUMMARY

[0005] The purpose of the present application is to provide an earth-rock dam anti-seepage and water-stopping structure to solve the problems in the background art.

[0006] In order to achieve the above object, the present application provides the following technical scheme: A soil and rock dam seepage prevention and water stopping structure, comprising a weak weathering foundation and a strong weathering foundation, a rockfill layer is arranged on the top of the strong weathering foundation, a core wall is arranged in the middle of the rockfill layer, a filter layer is arranged on the outer side of the filter layer, a filling cavity and a side hole are respectively arranged in the core wall, the filling cavity is filled with a concrete pile, a metal pipe is fixedly sleeved in the concrete pile, a side pipe is fixedly connected to the outer surface of the metal pipe, the side pipe penetrates through the concrete pile and is sleeved in the side hole, a filter element sleeve is sleeved on the inner surface of the metal pipe, an inner pipe is fixedly sleeved in the filter element sleeve, a communication pipe is fixedly sleeved on the inner surface of the inner pipe, a communication frame is fixedly arranged on the top surface of the core wall, the bottom of the communication frame is in communication with the communication pipe, a suction box is fixedly arranged on the top of the core wall, a first pipe is fixedly connected between the suction box and the communication frame, a filter hole is arranged on the outer surface of the inner pipe, and a heating pipe is sleeved in the inner pipe.

[0007] Preferably, a top cavity is arranged on the top surface of the core wall, a first hole is arranged in the core wall, the top of the first hole is in communication with the top cavity, and the inner surface of the top cavity is fixedly sleeved with the communication frame.

[0008] Preferably, a second hole is arranged in the core wall, the inner surface of the second hole is fixedly sleeved with the metal pipe, the upper end of the second hole is in communication with the first hole, and the communication pipe is fixedly sleeved in the first hole.

[0009] Preferably, the weak weathering foundation is arranged at the bottom of the strong weathering foundation, and a concrete seepage prevention wall is fixedly arranged in the weak weathering foundation and the strong weathering foundation.

[0010] Preferably, a through hole is arranged on the end surface of the concrete seepage prevention wall, a reinforcing rod is movably sleeved on the inner surface of the through hole, and the reinforcing rods are uniformly distributed in the weak weathering foundation and the strong weathering foundation.

[0011] Preferably, a fixing ring is fixedly sleeved on the inner surface of the through hole, a spring is fixedly connected to the side surface of the fixing ring, and the outer end of the spring is fixedly connected with the reinforcing rod.

[0012] Preferably, a gas supply box is fixedly arranged on the top of the core wall, a second pipe is fixedly connected between the gas supply box and the concrete seepage prevention wall, and the second pipe is fixedly sleeved in the core wall and the communication frame.

[0013] Preferably, the side pipes are annularly and equidistantly distributed on the outer surface of the metal pipe, and the concrete pile and the metal pipe are equidistantly distributed in the core wall.

[0014] The present application has the following beneficial effects:

[0015] 1、The present application is characterized in that the concrete pile is embedded in the core wall, the metal pipe is sleeved in the concrete pile, the side pipe with annular distribution is fixed to the outer surface of the metal pipe, the filter core sleeve is additionally arranged in the inner part of the metal pipe, the suction box at the top of the core wall is matched to realize the suction inside the communicating frame, the air in the inner pipe is sucked through the communicating pipe, the air in the inner pipe is absorbed into the side pipe and the inner pipe through the filter core sleeve and filter hole when the air pressure in the inner pipe is reduced, the clay is gradually adsorbed to the core wall through the reduction of the air pressure in the core wall, the internal density of the core wall is increased, the permeation caused by the reduction of the density due to the relaxation is avoided, and the good anti-permeation and water-stopping effect of the core wall after a certain period of use is ensured.

[0016] 2、The present application is characterized in that the heating pipe is additionally arranged in the inner pipe, the heat is conducted in the inner part of the core wall through the inner pipe, the metal pipe and the side pipe through the heating effect of the heating pipe, the infiltrated liquid in the clay in the core wall is gradually formed into wet air, and is further sucked out through the suction effect, the water content in the core wall is further reduced, the clay density is increased, the vaporization and suction of the infiltrated liquid are completed, and the actual anti-permeation effect of the core wall is greatly improved.

[0017] 3、The present application is characterized in that the lengthened rods in array distribution are connected to the two sides of the concrete anti-permeation wall, and the lengthened rods on the two sides are embedded into the inner part of the weakly weathered foundation and the strongly weathered foundation, when the geological deviation occurs in the weakly weathered foundation and the strongly weathered foundation, the lengthened rods on the two sides are matched to effectively increase the contact area with the clay, increase the frictional resistance, reduce the force of the geological influence on the concrete anti-permeation wall, maintain the stability, the air is introduced into the through hole after the air supply effect of the air supply box, the lengthened rods at the end surface of the concrete anti-permeation wall are pushed into the weakly weathered foundation and the strongly weathered foundation, and are arranged perpendicularly to the direction of the geological deviation, so that the stability of the concrete anti-permeation wall is strengthened when the weakly weathered foundation and the strongly weathered foundation are pushed in the transverse direction, the cracking and collapse caused by the force are avoided, and the actual anti-permeation and water-stopping effect is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the present application;

[0019] Figure 2 It is a sectional view schematic view of the present application;

[0020] Figure 3 It is Figure 2 the structure enlarged schematic view of A in the middle;

[0021] Figure 4 It is a sectional view schematic view of the core wall of the present application;

[0022] Figure 5The installation schematic diagram between the concrete pile and the metal pipe of the present application;

[0023] Figure 6 The sectional view schematic diagram of the metal pipe of the present application;

[0024] Figure 7 The Figure 6 The structure enlarged schematic diagram at B in the middle;

[0025] Figure 8 The schematic diagram of the concrete cutoff wall of the present application;

[0026] Figure 9 The explosion schematic diagram of the concrete cutoff wall of the present application.

[0027] In the figure: 1, weakly weathered foundation; 2, strongly weathered foundation; 3, rockfill layer; 4, filter layer; 5, anti-filtration layer; 6, core wall; 7, filling cavity; 8, side hole; 9, top cavity; 10, No. 1 hole; 11, No. 2 hole; 12, concrete pile; 13, metal pipe; 14, side pipe; 15, filter core sleeve; 16, inner pipe; 17, filter hole; 18, suction box; 19, communication frame; 20, No. 1 pipe; 21, concrete cutoff wall; 22, lengthening rod; 23, through hole; 24, fixing ring; 25, spring; 26, reinforcing rod; 27, No. 2 pipe; 28, gas supply box; 29, communication pipe; 30, heating pipe. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present application.

[0029] As Figures 1 to 9As shown, the embodiment of the present application provides a kind of earth-rock dam seepage prevention and water stop structure, including weak weathering foundation 1 and strong weathering foundation 2, the top of strong weathering foundation 2 is equipped with rockfill layer 3, the middle part of rockfill layer 3 is equipped with core wall 6, the both sides of core wall 6 are equipped with inverse filter layer 5, the outside of inverse filter layer 5 is equipped with filter layer 4, the inside of core wall 6 is respectively equipped with filling cavity 7 and side hole 8, the inside of filling cavity 7 is filled with concrete pile 12, the inside of concrete pile 12 is fixedly sleeved with metal pipe 13, the outer surface of metal pipe 13 is fixedly communicated with side pipe 14, side pipe 14 passes through concrete pile 12 and is sleeved in the inside of side hole 8, the inner surface of metal pipe 13 is sleeved with filter core sleeve 15, the inside of filter core sleeve 15 is fixedly sleeved with inner tube 16, the inner surface of inner tube 16 is fixedly sleeved with communication pipe 29, the top surface of core wall 6 is fixedly installed with communication frame 19, the bottom of communication frame 19 is communicated with communication pipe 29, the top of core wall 6 is fixedly installed with suction box 18, suction box 18 is fixedly communicated with communication frame 19 with No. 20 pipe, the outer surface of inner tube 16 is equipped with filter hole 17, the inside of inner tube 16 is sleeved with heating pipe 30.

[0030] First embodiment: when it needs to strengthen seepage prevention and water stop, start suction box 18, so that suction box 18 sucks air in communication frame 19 through No. 20 pipe, so that communication pipe 29 sucks air through inner tube 16 to side pipe 14, so that the clay in loose core wall 6 is adsorbed to the middle, and the air in loose clay is sucked out, the clay is extruded by each other, the density of the clay is increased, the clay on the downstream side of core wall 6 is re-gathered, and heating pipe 30 is started, so that the clay around core wall 6 is stably raised, a small amount of liquid beads that penetrate into core wall 6 gradually form steam, and are gradually sucked into inner tube 16, while the clay is blocked outside filter core sleeve 15, and wet air is sucked out upward through communication pipe 29.

[0031] First, by embedding concrete pile 12 in core wall 6, and sleeving metal pipe 13 in concrete pile 12, and fixedly communicating annularly distributed side pipe 14 on the outer surface of metal pipe 13, and additionally adding filter core sleeve 15 in the inside of metal pipe 13, cooperate with suction box 18 on the top of core wall 6 to realize suction inside communication frame 19, so as to cooperate with communication pipe 29 to suck air in inner tube 16, in the case of reducing the air pressure in inner tube 16, the air in core wall 6 is sucked into side pipe 14, and is sucked into inner tube 16 through filter core sleeve 15 and filter hole 17, so as to reduce the air pressure in core wall 6, so that the clay is gradually adsorbed to the middle, so as to strengthen the density of core wall 6, avoid the density reduction caused by relaxation to bring the penetration, so as to ensure that core wall 6 can still have good seepage prevention and water stop effect after a certain period of use.

[0032] In addition, by adding the heating pipe 30 inside the inner pipe 16, the heat conduction in the inner pipe 16, the metal pipe 13 and the side pipe 14 inside the core wall 6 through the heating effect of the heating pipe 30 makes the infiltrated liquid in the clay inside the core wall 6 gradually form wet air, and is sucked out through the suction effect, further reduces the water content in the core wall 6, improves the clay density, and completes the vaporization and suction of the infiltrated liquid, greatly improves the actual anti-seepage effect of the core wall 6.

[0033] As shown in Figure 2 , Figure 3 , Figure 4 and Figure 5 , the top surface of the core wall 6 is provided with a top cavity 9, and a first hole 10 is provided in the inside of the core wall 6, the top of the first hole 10 is communicated with the top cavity 9, the inner surface of the top cavity 9 is fixedly sleeved with the communication frame 19, a second hole 11 is provided in the inside of the core wall 6, the inner surface of the second hole 11 is fixedly sleeved with the metal pipe 13, the upper end of the second hole 11 is communicated with the first hole 10, and the communication pipe 29 is fixedly sleeved in the inside of the first hole 10.

[0034] In use, the communication of multiple groups of communication pipes 29 is completed by using the communication frame 19 in the top cavity 9, so that the suction of air in multiple groups of inner pipes 16 is completed when the suction box 18 is started, and the stable communication between the communication pipe 29 and the communication frame 19 and the inner pipe 16 is realized through the cooperation of the communication of the second hole 11 and the first hole 10.

[0035] As shown in Figure 1 , Figure 2 , Figure 8 and Figure 9 , the weakly weathered foundation 1 is located at the bottom of the strongly weathered foundation 2, the weakly weathered foundation 1 and the strongly weathered foundation 2 are fixedly installed with the concrete anti-seepage wall 21, the side surface of the concrete anti-seepage wall 21 is fixedly connected with the lengthening rod 22, the end surface of the concrete anti-seepage wall 21 is provided with the through hole 23, the inner surface of the through hole 23 movably sleeved with the reinforcing rod 26, the reinforcing rod 26 is uniformly distributed in the inside of the weakly weathered foundation 1 and the strongly weathered foundation 2, the inner surface of the through hole 23 is fixedly sleeved with the fixed ring 24, the side surface of the fixed ring 24 is fixedly connected with the spring 25, the outer end of the spring 25 is fixedly connected with the reinforcing rod 26, the top of the core wall 6 is fixedly installed with the gas supply box 28, the gas supply box 28 is fixedly communicated with the concrete anti-seepage wall 21 through the second pipe 27, the second pipe 27 is fixedly sleeved in the inside of the core wall 6 and the inside of the communication frame 19, the side pipe 14 is annularly and equidistantly distributed on the outer surface of the metal pipe 13, and the concrete pile 12 and the metal pipe 13 are equidistantly distributed in the inside of the core wall 6.

[0036] In use, the contact area is increased by the two-side distributed lengthening rods 22, thereby increasing the relative frictional damping and reducing the influence of geology on the concrete cutoff wall 21. The gas is introduced into the concrete cutoff wall 21 through the gas supply tank 28 cooperating with the second pipe 27, and the two-end reinforcing rods 26 are moved and inserted under the pushing of the gas, cooperating with the resistance in the vertical direction, further reducing the influence of the lateral offset pushing force of the weakly weathered foundation 1 and the strongly weathered foundation 2 on the concrete cutoff wall 21.

[0037] In the second embodiment, when the weakly weathered foundation 1 and the strongly weathered foundation 2 of the earth and rockfill dam are subjected to seepage prevention treatment, the concrete cutoff wall 21 is installed in the weakly weathered foundation 1 and the strongly weathered foundation 2, the lengthening rods 22 are fixedly connected to the two sides of the concrete cutoff wall 21, the lengthening rods 22 are buried in the weakly weathered foundation 1 and the strongly weathered foundation 2, the through holes 23 are formed in the end surface of the concrete cutoff wall 21, the reinforcing rods 26 are sleeved in the through holes, and the gas supply tank 28 is started to supply gas into the concrete cutoff wall 21 through the second pipe 27, and the reinforcing rods 26 are pushed and inserted into the weakly weathered foundation 1 and the strongly weathered foundation 2 in the through holes 23. When the weakly weathered foundation 1 and the strongly weathered foundation 2 are subjected to geological offset, the concrete cutoff wall 21 is maintained stable.

[0038] Firstly, the lengthening rods 22 are connected to the two sides of the concrete cutoff wall 21 in an array distribution, and the two-side lengthening rods 22 are buried in the weakly weathered foundation 1 and the strongly weathered foundation 2. When the weakly weathered foundation 1 and the strongly weathered foundation 2 are subjected to geological offset, the two-side lengthening rods 22 effectively increase the contact area with the clay, increase the frictional resistance, reduce the force of the geological influence on the concrete cutoff wall 21, maintain stable, and cooperate with the gas supply effect of the gas supply tank 28. After the pressure air is introduced into the through holes 23, the reinforcing rods 26 at the end surface of the concrete cutoff wall 21 are pushed and inserted into the weakly weathered foundation 1 and the strongly weathered foundation 2, and are arranged vertically to the direction of the geological offset. When the weakly weathered foundation 1 and the strongly weathered foundation 2 are subjected to lateral offset pushing, the stability of the concrete cutoff wall 21 is strengthened, the cracking and collapse under the action force are avoided, and the actual seepage prevention and water stopping effect is greatly improved.

[0039] Working principle and use process: firstly, when strengthening the anti-infiltration and water-stopping, start the suction box 18, so that the suction box 18 sucks the air in the communication frame 19 through the No. 1 pipe 20, so that the communication pipe 29 sucks the air through the inner pipe 16 to the side pipe 14, so that the clay in the loose core wall 6 is adsorbed to the middle, and the air in the loose clay is sucked out, the clay is extruded and the density is increased, the clay on the downstream side of the core wall 6 is reassembled, and the heating pipe 30 is started, so that the clay around the core wall 6 is stably raised, a small amount of liquid beads penetrating into the core wall 6 gradually form steam and gradually suck into the inner pipe 16, while the clay is blocked outside the filter core sleeve 15, and the wet air is sucked out upward through the communication pipe 29; when the weak weathering foundation 1 and the strong weathering foundation 2 of the earth-rock dam are treated, the concrete anti-infiltration wall 21 is installed in the weak weathering foundation 1 and the strong weathering foundation 2, the elongated rod 22 is fixedly connected on both sides of the concrete anti-infiltration wall 21, the elongated rod 22 is buried in the weak weathering foundation 1 and the strong weathering foundation 2, the through hole 23 is arranged on the end surface of the concrete anti-infiltration wall 21, the reinforcing rod 26 is sleeved in the through hole, the gas supply box 28 is started, the gas is supplied into the concrete anti-infiltration wall 21 through the No. 2 pipe 27, and the reinforcing rod 26 is inserted into the weak weathering foundation 1 and the strong weathering foundation 2 in the through hole 23, so that the concrete anti-infiltration wall 21 maintains stability when the weak weathering foundation 1 and the strong weathering foundation 2 appear geological deviation.

[0040] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An earth and rockfill dam seepage prevention and water stopping structure comprising a weakly weathered foundation (1) and a strongly weathered foundation (2), characterized in that: The top of the strong weathering foundation (2) is provided with a rockfill layer (3), the middle part of the rockfill layer (3) is provided with a core wall (6), the two sides of the core wall (6) are provided with a filter layer (5), the outer side of the filter layer (5) is provided with a filter layer (4), the inner part of the core wall (6) is respectively provided with a filling cavity (7) and a side hole (8), the inside of the filling cavity (7) is filled with a concrete pile (12), the inside of the concrete pile (12) is fixedly sleeved with a metal pipe (13), the outer surface of the metal pipe (13) is fixedly communicated with a side pipe (14), the side pipe (14) penetrates through the concrete pile (12) and is sleeved in the inside of the side hole (8), the inner surface of the metal pipe (13) is sleeved with a filter element sleeve (15), the inside of the filter element sleeve (15) is fixedly sleeved with an inner pipe (16), the inner surface of the inner pipe (16) is fixedly sleeved with a communication pipe (29), the top surface of the core wall (6) is fixedly installed with a communication frame (19), the bottom of the communication frame (19) is communicated with the communication pipe (29), the top of the core wall (6) is fixedly installed with a suction box (18), the suction box (18) and the communication frame (19) are fixedly communicated with a first pipe (20), the outer surface of the inner pipe (16) is provided with a filter hole (17), the inside of the inner pipe (16) is sleeved with a heating pipe (30), the weak weathering foundation (1) is located at the bottom of the strong weathering foundation (2), the inside of the weak weathering foundation (1) and the strong weathering foundation (2) is fixedly installed with a concrete impervious wall (21), the side surface of the concrete impervious wall (21) is fixedly connected with an extension rod (22), the end surface of the concrete impervious wall (21) is provided with a through hole (23), the inner surface of the through hole (23) is movably sleeved with a reinforcing rod (26), the reinforcing rod (26) is uniformly distributed in the inside of the weak weathering foundation (1) and the strong weathering foundation (2), the inner surface of the through hole (23) is fixedly sleeved with a fixed ring (24), the side surface of the fixed ring (24) is fixedly connected with a spring (25), the outer end of the spring (25) is fixedly connected with the reinforcing rod (26), the top of the core wall (6) is fixedly installed with a gas supply box (28), the gas supply box (28) and the concrete impervious wall (21) are fixedly communicated with a second pipe (27), the second pipe (27) is fixedly sleeved in the inside of the core wall (6) and the inside of the communication frame (19).

2. The earth-rock dam seepage-proof and water-stop structure according to claim 1, characterized in that: The top surface of the core wall (6) is provided with a top cavity (9), the inside of the core wall (6) is provided with a first hole (10), the top of the first hole (10) is communicated with the top cavity (9), the inner surface of the top cavity (9) is fixedly sleeved with the communication frame (19).

3. The earth and rock dam seepage prevention and water stopping structure according to claim 2, characterized in that: The inside of the core wall (6) is provided with a second hole (11), the inner surface of the second hole (11) is fixedly sleeved with the metal pipe (13), the upper end of the second hole (11) is communicated with the first hole (10), the communication pipe (29) is fixedly sleeved in the inside of the first hole (10).

4. The earth and rock dam seepage prevention and water stopping structure according to claim 3, characterized in that: The side pipes (14) are annularly and equidistantly distributed on the outer surface of the metal pipe (13), and the concrete piles (12) and the metal pipe (13) are equidistantly distributed inside the core wall (6).

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