CN216405317U - Impervious structure of weak position is connected with earth dam to masonry dam - Google Patents
Impervious structure of weak position is connected with earth dam to masonry dam Download PDFInfo
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- CN216405317U CN216405317U CN202122525775.9U CN202122525775U CN216405317U CN 216405317 U CN216405317 U CN 216405317U CN 202122525775 U CN202122525775 U CN 202122525775U CN 216405317 U CN216405317 U CN 216405317U
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Abstract
The utility model discloses an anti-seepage structure for a weak connection part of a masonry dam and an earth dam, which comprises the masonry dam and a concrete panel positioned on the upstream side of the masonry dam, wherein the concrete panel is lapped with a barbed wall extending into the earth dam; the lap joint department of concrete panel and thorn wall is equipped with first seal structure, the internal edge parallel dam axis direction of earth dam of thorn wall downstream side be equipped with masonry dam zonulae occludens's concrete cut-off wall, masonry dam and concrete cut-off wall's zonulae occludens department is equipped with the second seal structure, first seal structure and second seal structure and concrete cut-off wall form the dual barrier of seepage prevention to masonry dam and earth dam junction. The utility model has the advantages of safety, reliability, simple structure, convenient construction, good construction stress performance, good seepage-proofing effect and high safety performance, and can effectively solve the problems of dam body deformation, contact leakage and the like caused by the displacement of the single-thin barbed wall of the connecting part of the combined dam.
Description
Technical Field
The utility model relates to the field of seepage-proofing reinforcement of combined dams of hydraulic and hydroelectric engineering, in particular to a seepage-proofing structure for a weak connection part of a stone-laying dam and an earth dam.
Background
In the water conservancy and hydropower engineering, a dam shape arrangement mode of a combined dam is adopted in part of water retaining buildings so as to meet the requirements of complex terrain and geological conditions, wherein the combined dam formed by an earth dam and a gravity dam is relatively more. The joint of the earth dam and rigid buildings such as concrete is an impermeable weak part of the combined dam, and in order to prevent contact leakage, the joint usually adopts a mode that a concrete stabbing wall extends into the earth dam. Due to the complex stress of the soft and hard material interface of the earth dam body at the stabbing wall part, the cracking of the dam body at the connecting part of the combined dam and the high possibility of water stop failure between the stabbing wall and the gravity dam are generated, so that the concentrated leakage damage is generated at the weak connecting part, and the safety of the dam is seriously threatened. Particularly for the combined dam type of the stone-laying gravity dam and the earth dam, one end of the stabbing wall extending into the earth dam needs to be lapped with a concrete panel at the upstream of the stone-laying dam, and because the stabbing wall is in an operation state easy to move, the stress of the single thin stabbing wall is complex under the action of reservoir water, and the problems of dam body deformation and contact leakage at the connection part are easy to occur.
At present, aiming at the leakage problem of the connecting part of the combined dam, the filling, grouting and seepage-proofing treatment of the connecting part dam body is mostly adopted, and the implementation effect is not ideal. Based on the background, the utility model provides an anti-seepage structure for a weak connection part of a stone-laying dam and an earth dam on the basis of years of engineering experience.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide an anti-seepage structure for a weak part of a masonry dam and an earth dam. The utility model provides a seepage-proofing system for a combined dam connecting part, which is safe and reliable, simple in structure, convenient to construct, good in stress performance, good in seepage-proofing effect and high in safety performance, and effectively solves the problems of dam body deformation, contact leakage and the like caused by displacement of a single thin barbed wall of the combined dam connecting part.
In order to solve the technical problems, the utility model is realized by the following technical scheme:
the utility model provides an anti-seepage structure for a weak part of a masonry dam and an earth dam, which comprises a masonry dam and a concrete panel positioned on the upstream side of the masonry dam, wherein the concrete panel is lapped with a barbed wall extending into the earth dam; the lap joint department of concrete panel and thorn wall is equipped with first seal structure, the internal edge parallel dam axis direction of earth dam of thorn wall downstream side be equipped with masonry dam zonulae occludens's concrete cut-off wall, masonry dam and concrete cut-off wall's zonulae occludens department is equipped with the second seal structure, first seal structure and second seal structure and concrete cut-off wall form the dual barrier of seepage prevention to masonry dam and earth dam junction. The concrete impervious wall is additionally arranged in the dam body at the downstream side of the stabbed wall, so that a leakage channel formed by the contact surface of the stabbed wall and the soil dam can be effectively cut off.
Preferably, the first sealing structure comprises a first water stop structure arranged at the joint of the concrete panel and the stabbed wall and a micro-expansion elastic polyurethane cast-in-place pile arranged at the downstream side of the first water stop structure. The first water stopping structure and the micro-expansion elastic polyurethane cast-in-place pile form a first seepage-proofing line for the connecting part of the stone-laying dam and the earth dam together.
Preferably, the second sealing structure comprises a second water stopping structure for tightly connecting the masonry dam and the concrete impervious wall and an inverted well concrete pile formed in an included angle area of the masonry dam and the concrete impervious wall in a pouring mode, and the second water stopping structure is tightly connected with the inverted well concrete pile. And the second water stopping structure and the inverted well concrete pile form a second seepage-proofing line for the connecting part of the stone-laying dam and the earth dam together.
Preferably, the cross section of the concrete pile of the overhead well is fan-shaped, and the fan-shaped outer vertical surface of the concrete pile is embedded with a first radial anchor bar. The fan-shaped section can increase the construction space in the inverted hanging well and the pouring volume after backfilling concrete, thereby forming the reinforcing effect on the joint of the masonry dam and the concrete impervious wall.
Preferably, the second water stopping structure comprises an L-shaped water stopping copper sheet, one side surface of the L-shaped water stopping copper sheet is fixedly connected with the masonry dam in an attaching manner, and the other side surface of the L-shaped water stopping copper sheet is fixedly connected with the concrete impervious wall in an attaching manner; polyvinyl chloride cement is filled in a groove between the outer corner of the L-shaped water stop copper sheet and the masonry dam and the concrete impervious wall.
Preferably, two side surfaces of the L-shaped water stop copper sheet are respectively and fixedly connected with the stone masonry dam and the concrete impervious wall in a bonding mode through angle steel and a second anchor bar, and modified epoxy resin adhesive is coated on the bonding position.
Preferably, the concrete impervious wall comprises a first concrete impervious wall with one end tightly connected with the masonry dam and a second concrete impervious wall integrally formed with the other end of the first concrete impervious wall, the thickness of the first concrete impervious wall is greater than that of the second concrete impervious wall, and a reinforcement cage is arranged in the first concrete impervious wall. The first concrete impervious wall is thickened and the reinforcement cage is additionally arranged, so that the bearing capacity of the first concrete impervious wall can be further improved to meet the stress requirement of the deformation of the dam body of the joint part.
Preferably, the lower end of the concrete impervious wall is connected with bedrock curtain grouting. The water pressure resistance stability of the concrete diaphragm wall foundation can be enhanced.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
compared with the prior art, the concrete impervious wall is additionally arranged in the downstream side dam body of the stabbed wall, so that a leakage channel formed by the contact surface of the stabbed wall and the earth dam is effectively cut off. The inverted well concrete pile is additionally arranged at the connecting part of the masonry dam and the concrete impervious wall, so that the L-shaped water stop copper sheet embedding construction space and construction quality are ensured, the problem that the concrete impervious wall body is tightly connected with the surface of the masonry dam is effectively solved, and the seepage-proofing performance of the connecting part of the combined dam is improved. A reinforcement cage is additionally arranged on the thickened first concrete impervious wall at the connecting part of the stone-laying dam, so that the bearing capacity of the first concrete impervious wall is effectively improved to meet the stress requirement of the deformation of the dam body of the joint part. On the other hand, micro-expansion elastic polyurethane is drilled and poured near the first water stop structure on the contact surface of the stabbed wall and the concrete panel, a two-way closed seepage-proofing system is formed at the connecting part of the combined dam, a double seepage-proofing barrier is finally formed, and the seepage-proofing performance of the connecting part of the combined dam is effectively improved. The seepage-proofing structure of the connecting part of the combined dam has the advantages of good stress performance, excellent seepage-proofing performance, feasible operation and simple process, provides a new idea for reconstruction of a seepage-proofing system of the connecting part of the combined dam, and can provide reference for similar seepage-proofing reinforcement engineering.
Drawings
FIG. 1 is a schematic top view of the present invention;
FIG. 2 is a schematic view of the detailed structure of the first concrete impervious wall and the excavation of an inverted well according to the present invention;
FIG. 3 is a detailed structure diagram of the sealing connection between the first concrete impervious wall and the masonry dam according to the utility model;
fig. 4 is a detailed structure diagram of the joint of the concrete panel and the stabbed wall of the utility model.
Reference numerals: 1-building a stone dam; 2-earth dam; 3-sticking the wall; 4-concrete panels; 5-concrete impervious wall; 51-a first concrete impervious wall; 52-second concrete impervious wall; 510-a reinforcement cage; 6-a first sealing structure; 61-a first water stopping structure; 62-micro-expansion elastic polyurethane cast-in-place pile; 7-a second sealing structure; 71-a second water stopping structure; 72-hanging the well concrete pile upside down; 710- "L" type water stop copper sheet; 711-polyvinyl chloride plaster; 712-angle steel; 713-second anchor bar; 714-modified epoxy resin adhesive; 720-first anchor bar.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
The present invention will be further described with reference to the following examples and figures 1-4, but the utility model is not limited thereto.
As shown in fig. 1 to 4, the embodiment provides an impervious structure of weak portions of a masonry dam and an earth dam, comprising a masonry dam 1 and a concrete panel 4 located on the upstream side of the masonry dam 1, wherein the concrete panel 4 is overlapped with a stabbing wall 3 extending into the earth dam 2; concrete panel 4 is equipped with first seal structure 6 with the overlap joint department of thorn wall 3, the 2 dam bodies of the earth dam of 3 downstream sides of thorn wall along parallel dam axis direction be equipped with masonry dam 1 zonulae occludens's concrete cut-off wall 5, masonry dam 1 is equipped with second seal structure 7 with the zonulae occludens of concrete cut-off wall 5, first seal structure 6 and second seal structure 7 and concrete cut-off wall 5 form the double impervious barrier to masonry dam 1 and earth dam 2 junction.
In this embodiment, the first sealing structure 6 includes a first water stop structure 61 provided at the joint of the concrete panel and the stabbed wall 3, and a micro-expansion elastic polyurethane cast-in-place pile 62 provided on the downstream side of the first water stop structure 61. Wherein, the first water stop structure 61 is an "I" type water stop copper sheet.
In this embodiment, the second sealing structure 7 includes a second water stopping structure 71 for tightly connecting the masonry dam 1 and the concrete impervious wall 5 and an inverted well concrete pile 72 formed in an included angle area between the masonry dam 1 and the concrete impervious wall 5 in a pouring manner, and the second water stopping structure 71 and the inverted well concrete pile 72 are tightly connected. The section of the concrete pile 72 of the overhead well is fan-shaped, the fan-shaped outer vertical surface of the concrete pile is a concrete lining, and a first radial anchor bar 720 is embedded in the concrete lining. The second water stopping structure 71 comprises an L-shaped water stopping copper sheet 710, one side surface of the L-shaped water stopping copper sheet 710 is fixedly connected with the masonry dam 1 in an attaching mode, and the other side surface of the L-shaped water stopping copper sheet 710 is fixedly connected with the concrete impervious wall 5 in an attaching mode; polyvinyl chloride cement 711 is filled in a groove between the outer corner of the L-shaped water stop copper sheet 710 and the masonry dam 1 and the concrete impervious wall 5. Two side surfaces of the L-shaped water stop copper sheet 710 are respectively and fixedly connected with the stone masonry dam 1 and the concrete impervious wall 5 through angle steel 712 and a second anchor bar 713, and a modified epoxy resin adhesive 714 is coated at the joint.
In this embodiment, the concrete cut-off wall 5 includes a first concrete cut-off wall 51 with one end closely connected to the masonry dam 1 and a second concrete cut-off wall 52 integrally formed with the other end of the first concrete cut-off wall 51, the thickness of the first concrete cut-off wall 51 is greater than that of the second concrete cut-off wall 52, and a reinforcement cage 510 is configured in the first concrete cut-off wall 51. The lower ends of the first concrete impervious wall 51 and the second concrete impervious wall 52 are connected with bedrock curtain grouting. Thickening the first concrete diaphragm wall 51 and adding the reinforcement cage 510 can improve the overall strength of the diaphragm wall.
Based on the structure, the embodiment provides a construction method of an anti-seepage structure of a weak part for connecting a stone-laying dam and an earth dam, and the construction method comprises the following steps:
s1, constructing a first concrete impervious wall 51 and a second concrete impervious wall 52 in the dam body of the earth dam 2 on the downstream side of the stabbing wall 3 along the direction parallel to the axis of the dam, wherein both the first concrete impervious wall 51 and the second concrete impervious wall 52 are connected with a bedrock curtain for grouting, and the first concrete impervious wall 51 is connected with the masonry dam 1 to form a continuous impervious body;
s2, excavating downwards in an included angle area of the connecting part of the stone-laying dam 1 and the first concrete impervious wall 51 to form an inverted well, carrying out concrete lining on the inner wall of the inverted well by adopting a layered cast-in-place concrete method, and fixing through a first anchor bar 720;
s3, leveling the surface of the masonry dam 1 and the downstream surface of the first concrete impervious wall 51 by using high-strength cement mortar in an inverted well, respectively attaching and fixedly connecting an L-shaped water-stop copper sheet with the masonry dam 1 and the first concrete impervious wall 51 through angle steel 712 and a second anchor bar 713, smearing a modified epoxy resin adhesive 714 on the attaching surface, and filling a groove between the L-shaped water-stop copper sheet and the masonry dam 1 and the first concrete impervious wall 51 by using polyvinyl chloride cement 711;
s4, after the L-shaped water-stopping copper sheets are laid, backfilling concrete in the inverted well to form an inverted well concrete pile 72;
s5, arranging the first water stop structure 61 on the contact surface of the concrete panel 4 and the stabbed wall 3, and drilling and pouring the micro-expansive elastic polyurethane on the downstream side of the first water stop structure 61 to form a micro-expansive elastic polyurethane cast-in-place pile, and finally forming the double anti-seepage barrier.
According to the description and the attached drawings of the utility model, a person skilled in the art can easily manufacture or use the impervious structure of the weak part of the masonry dam and the earth dam, and can generate the positive effects recorded by the utility model.
Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (8)
1. An anti-seepage structure of a weak part of a masonry dam and an earth dam comprises the masonry dam (1) and a concrete panel (4) positioned on the upstream side of the masonry dam (1), wherein the concrete panel (4) is in lap joint with a stabbing wall (3) extending into the earth dam (2); the method is characterized in that: concrete panel (4) are equipped with first seal structure (6) with the overlap joint department of thorn wall (3), the internal edge parallel dam axis direction of earth dam (2) dam of thorn wall (3) downstream side be equipped with masonry dam (1) zonulae occludens's concrete cut-off wall (5), masonry dam (1) is equipped with second seal structure (7) with the zonulae occludens department of concrete cut-off wall (5), first seal structure (6) and second seal structure (7) and concrete cut-off wall (5) form the dual impervious barrier to masonry dam (1) and earth dam (2) junction.
2. The seepage-proofing structure for the weak part of the masonry dam and the earth dam connected according to claim 1, which is characterized in that: the first sealing structure (6) comprises a first water stopping structure (61) arranged at the lap joint of the concrete panel (4) and the stabbed wall (3) and a micro-expansion elastic polyurethane cast-in-place pile (62) arranged on the downstream side of the first water stopping structure (61).
3. The seepage-proofing structure for the weak part of the masonry dam and the earth dam connected according to claim 1, which is characterized in that: the second sealing structure (7) comprises a second water stopping structure (71) used for being tightly connected with the masonry dam (1) and the concrete impervious wall (5) and an inverted well concrete pile (72) formed in the included angle area of the masonry dam (1) and the concrete impervious wall (5) in a pouring mode, and the second water stopping structure (71) is tightly connected with the inverted well concrete pile (72).
4. The seepage-proofing structure for the weak part of the masonry dam and the earth dam connected according to the claim 3, is characterized in that: the section of the concrete pile (72) of the overhead well is fan-shaped, and a first radial anchor bar (720) is embedded on the fan-shaped outer vertical surface of the concrete pile.
5. The seepage-proofing structure for the weak part of the masonry dam and the earth dam connected according to the claim 3, is characterized in that: the second water stopping structure (71) comprises an L-shaped water stopping copper sheet (710), one side surface of the L-shaped water stopping copper sheet (710) is fixedly connected with the masonry dam (1) in an attaching mode, and the other side surface of the L-shaped water stopping copper sheet is fixedly connected with the concrete impervious wall (5) in an attaching mode; polyvinyl chloride cement mortar (711) is filled in a groove between the outer corner of the L-shaped water stop copper sheet (710) and the masonry dam (1) and the concrete impervious wall (5).
6. The seepage-proofing structure for the weak part of the masonry dam and the earth dam connected according to claim 5, is characterized in that: two side surfaces of the L-shaped water-stop copper sheet (710) are respectively and fixedly connected with the stone-laying dam (1) and the concrete impervious wall (5) through angle steel (712) and second anchor bars (713), and modified epoxy resin adhesive (714) is smeared at the joint.
7. The seepage-proofing structure for the weak part of the masonry dam and the earth dam connected according to claim 1, which is characterized in that: concrete impervious wall (5) include one end and masonry dam (1) zonulae occludens first concrete impervious wall (51) and with first concrete impervious wall (51) other end integrated into one piece's second concrete impervious wall (52), the thickness of first concrete impervious wall (51) is greater than the thickness of second concrete impervious wall (52), just dispose steel reinforcement cage (510) in first concrete impervious wall (51).
8. The seepage-proofing structure for the weak part of the masonry dam and the earth dam connected according to claim 1, which is characterized in that: the lower end of the concrete impervious wall (5) is connected with bedrock curtain grouting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122525775.9U CN216405317U (en) | 2021-10-20 | 2021-10-20 | Impervious structure of weak position is connected with earth dam to masonry dam |
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| CN202122525775.9U CN216405317U (en) | 2021-10-20 | 2021-10-20 | Impervious structure of weak position is connected with earth dam to masonry dam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863228A (en) * | 2021-10-20 | 2021-12-31 | 长江勘测规划设计研究有限责任公司 | Seepage-proofing structure for weak connection part of stone-laying dam and earth dam and construction method |
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2021
- 2021-10-20 CN CN202122525775.9U patent/CN216405317U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863228A (en) * | 2021-10-20 | 2021-12-31 | 长江勘测规划设计研究有限责任公司 | Seepage-proofing structure for weak connection part of stone-laying dam and earth dam and construction method |
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