Reverse drainage quick plugging structure

Abstract

The utility model relates to a reverse drainage quick plugging structure which is used for plugging a reverse drainage pipe of a concrete faced rockfill dam, the concrete faced rockfill dam comprises a toe board and a panel, and the reverse drainage pipe is arranged on the side, close to the panel, of the toe board. The reverse drainage quick plugging structure comprises an SR extrusion bag, preshrinking mortar and a plugging cover plate, the SR extrusion bag is arranged at the bottom of the reverse drainage pipe, the preshrinking mortar is arranged in the reverse drainage pipe and extends to an orifice of the reverse drainage pipe from one side of the SR extrusion bag, the plugging cover plate covers the orifice of the reverse drainage pipe, and the SR extrusion bag is arranged at the bottom of the reverse drainage pipe. And the plugging cover plate is fixedly connected with the toe board. According to the reverse drainage quick plugging structure, the reverse drainage plugging time can be shortened, the lifting amplitude of the water level of the dam body in the plugging period is reduced, and meanwhile the reverse water pressure jacking problem in the plugged dam body is solved through the measures of soil filling in the foundation pit, auxiliary saddle weights and water body pressing covering after water filling.

Description

Technical Field

[0001] The present application relates to the technical field of concrete panel rockfill dam engineering, and in particular to a reverse drainage rapid plugging structure. Background Art

[0002] Silt blankets are usually set up upstream of concrete face rockfill dams. Silt blankets are set below the dead water level. The fluidity of silt is used to fill and self-heal the small cracks generated during the operation of the dam, which plays an auxiliary role in anti-seepage. In addition, during reverse drainage plugging, the weight of the blanket is used to offset the supporting effect of the reverse water pressure in the dam body on the panel during the reverse drainage plugging process, ensuring the safety of the panel during the plugging period. However, the self-healing effect of silt is not applicable to the structural damage of the panel. When the panel in the blanket area is structurally damaged, the existence of silt blankets will cause great difficulties in panel repair. This situation has begun to appear in the early panel rockfill dam projects built in my country.

[0003] For pumped storage power stations, the water in the upper and lower reservoirs can be exchanged through the water transfer system, and the conditions for draining the reservoir for maintenance are relatively good. In this case, after taking auxiliary anti-seepage measures such as polyurea for the panels below the dead water level, the upstream covering of the panel rockfill dam is cancelled. Although the advantages outweigh the disadvantages from the perspective of the long-term operation of the dam, it also brings about the problem of panel reverse water pressure support damage during the reverse drainage and blocking before water storage. Utility Model Content

[0004] The first aspect of the embodiment of the present application provides a reverse drainage rapid sealing structure, which can reduce the time of reverse drainage sealing and reduce the rise of the dam water level during the sealing period. At the same time, it uses measures such as filling soil in the foundation pit, auxiliary weight blocks and water pressure after filling to solve the problem of reverse water pressure support in the dam body after sealing.

[0005] The reverse drainage rapid plugging structure provided in the first aspect of the embodiment of the present application is used to plug the reverse drainage pipe of a panel rockfill dam, the panel rockfill dam includes a toe plate and a panel, the reverse drainage pipe is arranged on the side of the toe plate close to the panel, the reverse drainage rapid plugging structure includes an SR extrusion bag, a pre-shrinkage mortar and a plugging cover plate, the SR extrusion bag is arranged at the bottom position of the reverse drainage pipe, the pre-shrinkage mortar is arranged in the reverse drainage pipe, and the pre-shrinkage mortar extends from one side of the SR extrusion bag to the orifice of the reverse drainage pipe, the plugging cover plate covers the orifice position of the reverse drainage pipe, and the plugging cover plate is fixedly connected to the toe plate.

[0006] In addition, the reverse drainage rapid plugging structure provided in the embodiment of the present application may also have the following additional technical features:

[0007] In an optional solution, the reverse drainage rapid plugging structure further includes a reverse sleeve, the reverse sleeve includes a tube body and a fixing plate, one end of the tube body along the length direction is connected to the fixing plate, and the fixing plate is provided with a plurality of bolt holes;

[0008] The reverse sleeve and the SR extrusion bag are in abutment state. In the abutment state, the tube body is inserted into the reverse drain pipe and abuts against the SR extrusion bag. The fixing plate is attached to the surface of the toe plate. The fixing plate and the toe plate are connected by bolts passing through the bolt holes.

[0009] In an optional scheme, the SR extrusion package includes a base, an extrusion plate and an SR plastic filling package, and the SR plastic filling package is arranged between the base and the extrusion plate; in the abutment state, the tube body abuts against the extrusion plate, and the tube body compresses the relative space between the extrusion plate and the base to extrude the SR plastic filling package.

[0010] In an optional scheme, the base includes a first plate body and a bolt rod, one end of the bolt rod along the length direction is connected to the middle part of the first plate body, and the other end passes through the SR plastic filler bag and is exposed on the upper surface of the extrusion plate, and the exposed part of the bolt rod is threadedly connected with an extrusion nut.

[0011] In an optional solution, the extrusion plate includes a second plate body and a plurality of fixing rods, a through hole is opened in the middle of the second plate body, and one end of the fixing rod along the length direction is connected to the second plate body; in the abutting state, the fixing rod is sleeved on the inner wall of the tube body.

[0012] In an optional scheme, the blocking cover plate includes a cover plate body, an SR plastic filler sheet and a rubber gasket, the rubber gasket is arranged in the SR plastic filler sheet and surrounds the orifice of the reverse drain pipe, the cover plate body is arranged on the surface of the SR plastic filler sheet, and the cover plate body and the SR plastic filler sheet are fixedly connected to the toe plate by bolts and nuts.

[0013] In an optional solution, the reverse drainage rapid plugging structure also includes a covering structure, which is used to temporarily cover the panel within the foundation pit, and the covering structure includes foundation pit backfill soil, concrete weight blocks and water.

[0014] The second aspect of the embodiment of the present application provides a non-pressure weight plugging method, wherein the non-pressure weight plugging method uses the reverse drainage rapid plugging structure in the embodiment of the first aspect to plug the reverse drainage pipe, and the non-pressure weight plugging method specifically includes the following steps:

[0015] 1) Pour concrete weight blocks on the panels on both sides of the reverse drainage pipe, anchor them to the toe plate and its foundation through anchor bars, backfill the foundation pit with soil, and reserve space for plugging operations;

[0016] 2) According to the inner diameter of the reverse drain pipe and the length of the straight section, process the SR extrusion package and the reverse sleeve;

[0017] 3) Clean the wall of the straight section of the reverse drainage pipe, assemble the SR extrusion package and the reverse sleeve, and then put the SR extrusion package into the reverse drainage pipe. The fixing plate of the reverse sleeve is fixed to the pre-buried bolts of the reverse drainage pipe with nuts;

[0018] 4) Use a wrench with a sleeve to tighten the extrusion nut of the SR extrusion pack until no water comes out of the reverse drainage hole;

[0019] 5) Take out the reverse sleeve, drain the water in the reverse drain pipe, and further check the sealing. If the water seepage affects the construction quality of the preshrinkage mortar, further tighten it and increase the tightening force;

[0020] 6) Use absorbent materials to absorb the residual water in the reverse drainage pipe and quickly pour in pre-shrinkage mortar;

[0021] 7) Clean the concrete within the coverage of the plugging cover, cover it with SR plastic filler sheets with a thickness of not less than 5mm, cover it with rubber gaskets and squeeze and embed the SR plastic filler, then cover the cover body and anchor the bolts;

[0022] 8) Fill the reserved operating space of the toe plate pit with water until the pit is full.

[0023] The beneficial effects of the embodiments of the present application are:

[0024] The reverse drainage rapid plugging structure and non-weighted plugging method in the embodiment of the present application utilize the extrusion and anti-seepage characteristics of SR plastic fillers, pre-make SR extrusion packs, improve the initial water plugging effect, and achieve rapid and effective plugging of reverse drainage. If the panel is repaired during the reverse drainage operation, the conditions for reopening and secondary plugging are met. When plugging, measures such as foundation pit filling, a small amount of weighted concrete, and watering after plugging are combined to solve the problem of reverse water pressure support before water storage, thereby making it possible not to set weighted blankets upstream of the panel rockfill dam, creating convenient conditions for permanent operation and maintenance.

[0025] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The overall structural diagram of the reverse drainage rapid plugging structure provided in this application;

[0027] Figure 2 A schematic diagram of the structure of the SR extrusion package provided for this application during initial plugging installation;

[0028] Figure 3 A schematic diagram of the structure of a reverse sleeve provided in the present application in a specific embodiment;

[0029] Figure 4 A schematic diagram of the structure of a base provided in the present application in a specific embodiment;

[0030] Figure 5 A schematic diagram of the structure of an extruded plate provided in the present application in a specific embodiment;

[0031] Figure 6 A schematic diagram of the installation structure of the blocking cover plate provided in the present application in a specific embodiment;

[0032] Figure 7 Schematic diagram of foundation pit filling and weighting during reverse drainage and plugging in this application.

[0033] Figure numerals: toe board 1, panel 2, reverse drain pipe 3, SR extrusion package 4, base 41, first plate body 411, bolt rod 412, extrusion plate 42, second plate body 421, fixing rod 422, through hole 423, SR plastic filling package 43, extrusion nut 44, preshrinkage mortar 5, sealing cover plate 6, cover plate body 61, SR plastic filling sheet 62, rubber gasket 63, reverse sleeve 7, pipe body 71, fixing plate 72, bolt hole 73, pressing structure 8, foundation pit backfill 81, concrete weight block 82.

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0035] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0036] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0037] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0038] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0039] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0040] like Figure 1-7 As shown, the first aspect of the embodiment of the present application provides a reverse drainage rapid plugging structure, which is used to plug the reverse drainage pipe 3 of the panel rockfill dam, wherein the panel rockfill dam includes a toe plate 1 and a panel 2, and the reverse drainage pipe 3 is arranged on the side of the toe plate 1 close to the panel 2. The reverse drainage rapid plugging structure includes an SR extrusion bag 4, a pre-shrinkage mortar 5 and a plugging cover plate 6, wherein the SR extrusion bag 4 is arranged at the bottom position of the reverse drainage pipe 3 for preliminary temporary plugging, the pre-shrinkage mortar 5 is arranged in the reverse drainage pipe 3, and the pre-shrinkage mortar 5 extends from one side of the SR extrusion bag 4 to the orifice of the reverse drainage pipe 3, the plugging cover plate 6 covers the orifice position of the reverse drainage pipe 3, and the plugging cover plate 6 is fixedly connected to the toe plate 1.

[0041] like Figure 2-3 As shown, in a specific embodiment, the reverse drainage rapid plugging structure also includes a reverse sleeve 7, the reverse sleeve 7 includes a tube body 71 and a fixing plate 72, one end of the tube body 71 along the length direction is connected to the fixing plate 72, and the fixing plate 72 is provided with a plurality of bolt holes 73; there is an abutment state between the reverse sleeve 7 and the SR extrusion package 4, in the abutment state, the tube body 71 is inserted into the reverse drainage pipe 3 and abuts against the SR extrusion package 4, the fixing plate 72 is attached to the surface of the toe plate 1, and the fixing plate 72 and the toe plate 1 are connected by bolts passed through the bolt holes 73.

[0042] like Figure 2-5 As shown, in a specific embodiment, the SR extrusion package 4 includes a base 41, an extrusion plate 42 and a SR plastic filling package 43, and the SR plastic filling package 43 is arranged between the base 41 and the extrusion plate 42; in the abutment state, the tube body 71 abuts against the extrusion plate 42, and the tube body 71 compresses the relative space between the extrusion plate 42 and the base 41 to extrude the SR plastic filling package 43.

[0043] like Figure 4 As shown, in a specific embodiment, the base 41 includes a first plate body 411 and a bolt rod 412, one end of the bolt rod 412 along the length direction is connected to the middle of the first plate body 411, and the other end passes through the SR plastic filler bag 43 and is exposed on the upper surface of the extrusion plate 42, and the exposed part of the bolt rod 412 is threadedly connected with the extrusion nut 44. Specifically, the first plate body 411 can be a circular steel plate, and the bolt rod 412 is welded in the middle position of the circular steel plate to form the base 41.

[0044] In order to deliver the SR extrusion pack 4 into the bottom of the reverse drainage pipe 3 and fix the SR extrusion pack 4 during the extrusion plugging process, a reverse sleeve 7 is provided. During the initial plugging, the reverse sleeve 7 is connected with the SR extrusion pack 4 to form a detachable whole. After being pushed into the bottom of the reverse drainage pipe 3, the entire component is fixed on the toe plate 1 by using the extrusion nut 44.

[0045] like Figure 5 As shown, in a specific embodiment, the extrusion plate 42 includes a second plate body 421 and a plurality of fixing rods 422, a through hole 423 is opened in the middle of the second plate body 421, and one end of the fixing rod 422 along the length direction is connected to the second plate body 421; when in the abutting state, the fixing rod 422 is sleeved on the inner wall of the tube body 71.

[0046] In this embodiment, the second plate body 421 can also be a circular steel plate. In order to facilitate the SR extrusion pack 4 to be sent to the bottom of the reverse drainage pipe 3, the extrusion plate 42 is provided with three fixing rods 422. The SR plastic filler is made into a columnar SR plastic filler pack 43 and then inserted into the bolt rod 412 of the base 41. The extrusion plate 42 is put on. The extrusion force formed by the extrusion nut 44 is tightened to reduce the height of the SR plastic filler pack 43 and expand the periphery. The column diameters of the base 41, the extrusion plate 42, and the SR plastic filler pack 43 are consistent and slightly smaller than the diameter of the reverse drainage pipe 3. In addition, the pipe body 71 and the fixing plate 72 in the reverse sleeve 7 can also be formed by welding a steel plate with a steel pipe. The opening diameter in the middle of the steel plate is consistent with the inner diameter of the steel pipe. Bolt holes 73 are set around the periphery according to the bolts pre-buried in the sealing cover plate 6 on the surface of the toe plate 1. The inner diameter of the steel pipe matches the fixing rod 422 of the extrusion plate 42. After the steel pipe is inserted into the fixing rod 422, a relatively stable and movable whole can be formed.

[0047] like Figure 6 As shown, in a specific embodiment, the sealing cover plate 6 includes a cover plate body 61, an SR plastic filler sheet 62 and a rubber gasket 63, the rubber gasket 63 is arranged in the SR plastic filler sheet 62 and surrounds the opening of the reverse drain pipe 3, the cover plate body 61 is arranged on the surface of the SR plastic filler sheet 62, and the cover plate body 61 and the SR plastic filler sheet 62 are fixedly connected to the toe plate 1 by bolts and nuts to form a water-stopping sealing structure.

[0048] like Figure 7 As shown, in a specific embodiment, the reverse drainage rapid plugging structure also includes a pressure-covering structure 8, which is used to temporarily cover the panels 2 within the scope of the foundation pit, and the pressure-covering structure 8 includes foundation pit backfill soil 81, concrete ballast blocks 82 and water. Specifically, in order to ensure the top support destruction of reverse water during the pressure-covering period, the panels 2 within the scope of the foundation pit are temporarily pressed, and before plugging, the foundation pit is first backfilled with silt (or clay, sand), and a plugging operation space is reserved. The panels 2 in the reserved space are temporarily pressed with concrete ballast blocks 82. After the plugging is completed, the reserved plugging space is filled with water to the top surface of the foundation pit.

[0049] The second aspect of the embodiment of the present application provides a non-pressure weight plugging method, which uses the reverse drainage rapid plugging structure in the embodiment of the first aspect to plug the reverse drainage pipe 3. The non-pressure weight plugging method specifically includes the following steps:

[0050] 1) Concrete weight blocks 82 are poured on the panels 2 on both sides of the reverse drainage pipe 3, and are anchored together with the toe plate 1 and its foundation through anchor bars. The foundation pit is backfilled with foundation pit backfill soil 81 (silt, clay or sand) to reserve space for plugging operations;

[0051] 2) According to the inner diameter of the reverse drain pipe 3 and the length of the straight section, the SR extrusion package 4 and the reverse sleeve 7 are processed;

[0052] 3) Clean the wall of the straight section of the reverse drainage pipe 3, assemble the SR extrusion package 4 and the reverse sleeve 7, and then put the SR extrusion package 4 into the reverse drainage pipe 3, and fix the fixing plate 72 of the reverse sleeve 7 to the pre-buried bolts of the reverse drainage pipe 3 with nuts;

[0053] 4) Use a wrench with a sleeve to tighten the extrusion nut 44 of the SR extrusion pack 4 until no water comes out of the orifice of the reverse drainage hole;

[0054] 5) Take out the reverse sleeve 7, drain the water in the reverse drain pipe 3, and further check the sealing. If the water seepage affects the construction quality of the preshrinkage mortar 5, further tighten it and increase the tightening force;

[0055] 6) Use water-absorbing materials to absorb the residual water in the reverse drainage pipe 3, and quickly pour in the pre-shrinkage mortar 5;

[0056] 7) Clean the concrete within the coverage of the plugging cover plate 6, cover it with SR plastic filler sheet 62 with a thickness of not less than 5 mm, cover it with rubber gasket 63 and squeeze and embed the SR plastic filler, then cover the cover plate body 61 and anchor the bolts;

[0057] 8) Water is poured into the reserved operating space of the toe plate 1 foundation pit until the foundation pit is filled.

[0058] The reverse drainage rapid plugging structure and non-weighted plugging method in the embodiment of the present application utilize the extrusion and anti-seepage characteristics of SR plastic fillers, pre-make SR extrusion packs, improve the initial water plugging effect, and achieve rapid and effective plugging of reverse drainage. If the panel is repaired during the reverse drainage operation, the conditions for reopening and secondary plugging are met. When plugging, measures such as foundation pit filling, a small amount of weighted concrete, and watering after plugging are combined to solve the problem of reverse water pressure support before water storage, thereby making it possible not to set weighted blankets upstream of the panel rockfill dam, creating convenient conditions for permanent operation and maintenance.

[0059] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A reverse drainage rapid plugging structure, used for plugging a reverse drainage pipe of a face rockfill dam, wherein the face rockfill dam comprises a toe plate and a face plate, and the reverse drainage pipe is arranged on a side of the toe plate close to the face plate, characterized in that: The reverse drainage rapid plugging structure includes an SR extrusion bag, pre-shrinkage mortar and a plugging cover plate, the SR extrusion bag is arranged at the bottom position of the reverse drainage pipe, the pre-shrinkage mortar is arranged in the reverse drainage pipe, and the pre-shrinkage mortar extends from one side of the SR extrusion bag to the orifice of the reverse drainage pipe, the plugging cover plate covers the orifice position of the reverse drainage pipe, and the plugging cover plate is fixedly connected to the toe plate.

2. The reverse drainage rapid plugging structure according to claim 1 is characterized in that: The reverse drainage rapid plugging structure further includes a reverse sleeve, which includes a tube body and a fixing plate, one end of the tube body along the length direction is connected to the fixing plate, and the fixing plate is provided with a plurality of bolt holes; The reverse sleeve and the SR extrusion bag are in abutment state. In the abutment state, the tube body is inserted into the reverse drain pipe and abuts against the SR extrusion bag. The fixing plate is attached to the surface of the toe plate. The fixing plate and the toe plate are connected by bolts passing through the bolt holes.

3. The reverse drainage rapid plugging structure according to claim 2 is characterized in that: The SR extrusion package includes a base, an extrusion plate and an SR plastic filling package, wherein the SR plastic filling package is arranged between the base and the extrusion plate; in the abutting state, the tube body abuts against the extrusion plate, and the tube body compresses the relative space between the extrusion plate and the base to extrude the SR plastic filling package.

4. The reverse drainage rapid plugging structure according to claim 3 is characterized in that: The base includes a first plate body and a bolt rod, one end of the bolt rod along the length direction is connected to the middle part of the first plate body, and the other end passes through the SR plastic filler bag and is exposed on the upper surface of the extrusion plate. The exposed part of the bolt rod is threadedly connected with an extrusion nut.

5. The reverse drainage rapid plugging structure according to claim 3 or 4, characterized in that: The extrusion plate includes a second plate body and a plurality of fixing rods. A through hole is opened in the middle of the second plate body. One end of the fixing rod along the length direction is connected to the second plate body. In the abutting state, the fixing rod is sleeved on the inner wall of the tube body.

6. The reverse drainage rapid plugging structure according to any one of claims 1 to 4, characterized in that: The blocking cover plate includes a cover plate body, an SR plastic filler sheet and a rubber gasket, wherein the rubber gasket is arranged in the SR plastic filler sheet and surrounds the opening of the reverse drain pipe, and the cover plate body is arranged on the surface of the SR plastic filler sheet, and the cover plate body and the SR plastic filler sheet are fixedly connected to the toe plate by bolts and nuts.

7. The reverse drainage rapid plugging structure according to claim 6, characterized in that: The reverse drainage rapid plugging structure also includes a pressing structure, which is used to temporarily press the panel within the foundation pit. The pressing structure includes foundation pit backfill soil, concrete weight blocks and water.

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