CN116641344A - Double-row seepage-proofing structure of deep covering layer - Google Patents
Double-row seepage-proofing structure of deep covering layer Download PDFInfo
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- CN116641344A CN116641344A CN202310843889.9A CN202310843889A CN116641344A CN 116641344 A CN116641344 A CN 116641344A CN 202310843889 A CN202310843889 A CN 202310843889A CN 116641344 A CN116641344 A CN 116641344A
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- seepage
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- rock
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- 230000007704 transition Effects 0.000 claims description 13
- 239000011384 asphalt concrete Substances 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 5
- 239000004927 clay Substances 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 4
- 238000007596 consolidation process Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims 1
- 239000002245 particle Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 8
- 239000011435 rock Substances 0.000 abstract description 6
- 238000010276 construction Methods 0.000 description 7
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/06—Earth-fill dams; Rock-fill dams
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a double-row seepage-proofing structure of a deep covering layer. The double-row seepage-proofing structure of the deep-thick covering layer comprises a core wall rock-fill dam, a front-row seepage-proofing wall and a rear-row seepage-proofing wall, wherein the core wall rock-fill dam is arranged above the deep-thick covering layer, the front-row seepage-proofing wall and the rear-row seepage-proofing wall are sequentially arranged in the deep-thick covering layer at intervals in parallel along the upstream-to-downstream direction, the front-row seepage-proofing wall and the rear-row seepage-proofing wall are vertical to the flow direction of water flow, the top of the front-row seepage-proofing wall is vertically inserted into a seepage-proofing body of the core wall rock-fill dam, the bottom of the front-row seepage-proofing wall is vertically inserted into a base rock layer below the deep-thick covering layer, the top of the rear-row seepage-proofing wall is vertically connected with a gallery at the bottom of the core wall rock-fill dam, and the bottom of the rear-row seepage-proofing wall is vertically connected with a curtain grouting structure in the base rock-fill layer. The double-row seepage-proofing structure of the deep covering layer can improve seepage-proofing effect.
Description
Technical Field
The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a double-row seepage-proofing structure of a deep covering layer.
Background
At present, the deep and thick river bed coverage in southwest and northwest areas of China is remarkable, and due to the limitation of the prior art means, only the earth-rock dam type can be considered when the dam is constructed on the coverage layer, and the corresponding anti-seepage treatment is needed when the earth-rock dam is constructed. And when the core wall rock-fill dam in the earth-rock dam is constructed, the problem of connection between the dam foundation seepage-proofing system and the dam body seepage-proofing system is also required to be considered.
In south Xinjiang, a dam construction environment of high earthquake, high severe cold, high altitude, high side slope, deep coverage layer and high sediment is commonly existed, along with the change of dam construction requirements and the development of a dam construction technology, the current construction of a mountain area control reservoir dam is limited to upstream of a river, and the development mode enters the stages of higher dam construction, smaller reservoir capacity, deeper seepage prevention, greater difficulty and greater investment. At present, the core wall, the single-row impervious wall and the curtain grouting structure are combined or a wall-to-bottom impervious mode is adopted to realize the seepage prevention of the core wall rock-fill dam. The thickness of the single-row impervious wall is generally about 0.6m-1.2m under the restriction of construction technology, when the dam water retaining head is higher, the single-row impervious wall can bear larger hydraulic gradient, and under the long-term action of water flow, the single-row impervious wall can have penetration damage, so that the safety of the dam is influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a double-row seepage-proofing structure of a deep and thick covering layer, which can improve the seepage-proofing effect.
The invention adopts the following technical scheme:
the invention provides a double-row seepage-proofing structure of a deep-thickness covering layer, which comprises a core wall rock-fill dam, a front-row seepage-proofing wall and a rear-row seepage-proofing wall, wherein the core wall rock-fill dam is arranged above the deep-thickness covering layer, the front-row seepage-proofing wall and the rear-row seepage-proofing wall are sequentially arranged in the deep-thickness covering layer at intervals in parallel along the upstream-to-downstream direction, the front-row seepage-proofing wall and the rear-row seepage-proofing wall are vertical to the flow direction of water flow, the top of the front-row seepage-proofing wall is vertically inserted into a seepage-proofing body of the core wall rock-fill dam, the bottom of the front-row seepage-proofing wall is vertically inserted into a base rock layer below the deep-thickness covering layer, the top of the rear-row seepage-proofing wall is vertically connected with a gallery at the bottom of the core wall rock-fill dam, and the bottom of the rear-row seepage-proofing wall is vertically connected with a curtain grouting structure in the base rock layer.
Preferably, the core wall rock-fill dam comprises a rock-fill body, a transition body and an impermeable body, wherein the impermeable body is positioned at the axial position of the core wall rock-fill dam, the rock-fill body is positioned at two sides of the impermeable body and covers the top of the impermeable body, and the transition body is connected with the rock-fill body and the impermeable body.
Preferably, the rock-fill body is constituted by rock-fill.
Preferably, the transition body is composed of sand stones.
Preferably, the grit size is 80mm-150mm.
Preferably, the portion of the impermeable body near the bottom is made of clay or asphalt concrete, and the other portion is made of gravel soil.
Preferably, the top of the dam foundation of the core wall rock-fill dam is provided with a reinforced foundation, and the bottom range of the seepage-proofing body is provided with a consolidation grouting layer.
Preferably, the front row of impervious walls and the rear row of impervious walls are plain concrete impervious walls.
Compared with the prior art, the invention has the beneficial effects that:
in the double-row seepage-proofing structure of the deep-thick covering layer, the front seepage-proofing wall penetrates out of the deep-thick covering layer, the top is connected with the seepage-proofing body of the core wall rock-fill dam, and the bottom penetrates deep into the base stratum, so that a first seepage-proofing line from the upstream direction to the downstream direction is formed, and the first seepage-proofing effect is exerted; the rear-row impervious wall also penetrates through the deep covering layer, the top is connected with the gallery, and the bottom is connected with the curtain grouting structure, so that a second impervious line behind the front-row impervious wall is formed, and the second impervious effect is exerted.
The seepage-proofing system formed by the front-row seepage-proofing wall and the rear-row seepage-proofing wall can play a role in reducing the total water head of underground water twice, so that the seepage-proofing effect is improved. Meanwhile, the arrangement of the double-row impervious wall can prevent the safety of the core wall rock-fill dam from being affected after the seepage damage of the single-row impervious wall.
Drawings
FIG. 1 is a cross-sectional block diagram of a dual-row barrier structure for a deep blanket in accordance with an embodiment of the present invention.
Wherein reference numerals are as follows:
1. core wall rock-fill dam 4 and deep coverage layer
11. Impermeable body 5, bedrock layer
12. Transition body 6, gallery
13. Rock-fill body 7, curtain grouting structure
2. Front-row impervious wall 8 and reinforced foundation
3. Rear-row impervious wall 9 and concreted grouting layer
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to be limiting.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
Referring to fig. 1, the embodiment provides a double-row seepage-proofing structure of a deep-thickness coverage layer, which comprises a core rock-fill dam 1, a front-row seepage-proofing wall 2 and a rear-row seepage-proofing wall 3, wherein the core rock-fill dam 1 is arranged above the deep-thickness coverage layer 4, the front-row seepage-proofing wall 2 and the rear-row seepage-proofing wall 3 are sequentially arranged in the deep-thickness coverage layer 4 at parallel intervals along the upstream-to-downstream direction, the front-row seepage-proofing wall 2 and the rear-row seepage-proofing wall 3 are both perpendicular to the flow direction of water flow, the top of the front-row seepage-proofing wall 2 is vertically inserted in a seepage-proofing body 11 of the core rock-fill dam 1, the bottom of the front-row seepage-proofing wall 2 is vertically inserted in a bedrock layer 5 below the deep-thickness coverage layer 4, the top of the rear-row seepage-proofing wall 3 is vertically connected with a gallery 6 at the bottom of the core rock-fill dam 1, and the bottom of the rear-row seepage-proofing wall 3 is vertically connected with a curtain grouting structure 7 in the bedrock layer 5.
In the double-row seepage-proofing structure of the deep-thick covering layer, the front-row seepage-proofing wall 2 penetrates out of the deep-thick covering layer 4, the top is connected with the seepage-proofing body 11 of the core wall rock-fill dam 1, and the bottom penetrates into the stratum 5, so that a first seepage-proofing line from upstream to downstream is formed, and the side seepage-proofing effect is exerted; the rear-row impervious wall 3 also penetrates through the deep covering layer 4, the top is connected with the gallery 6, and the bottom is connected with the curtain grouting structure 7, so that a second impervious line behind the front-row impervious wall 2 is formed, and the main impervious function is exerted.
The seepage-proofing system formed by the front-row seepage-proofing wall 2 and the rear-row seepage-proofing wall 3 can play a role in reducing the total water head of underground water twice, thereby increasing the seepage-proofing effect. Meanwhile, the arrangement of the double-row impervious wall can ensure the safety of the core wall rock-fill dam to the greatest extent after the front-row impervious wall 2 fails.
In addition, the curtain grouting structure 7 added to the bottom of the rear-row impervious wall 3 can increase the impervious safety of the dam foundation, and engineering investment is saved compared with the traditional one-wall-to-bottom structure.
It should be noted that, the sizes of the front-row impervious wall 2 and the rear-row impervious wall 3 can be compared through dam seepage calculation and analysis to obtain the optimal size, so that investment optimization is realized while seepage safety is ensured.
Preferably, referring to fig. 1, the core rockfill dam 1 includes a rockfill body 13, a transition body 12, and an impermeable body 11, the impermeable body 11 is located at a dam axis position of the core rockfill dam 1, the rockfill body 13 is located at both sides of the impermeable body 11 and covers the top of the impermeable body 11, and the transition body 12 connects the rockfill body 13 and the impermeable body 11. The rock-fill body 13 is used for bearing water load and protecting the transition body 12 and the seepage-proofing body 11; the transition body 12 is used for protecting the seepage-proofing body 11 from damage under the action of a high water head; the seepage-proofing body 11 is used as the integral foundation of the core wall rock-fill dam 1 and plays a role in assisting seepage control.
Preferably, the rock-fill body 13 is composed of rock-fill.
Preferably, the transition body 12 is composed of sand stones.
Preferably, the grit size is 80mm-150mm to provide the transition body 12 with better protection against the body 11 from damage by the high head of water.
Preferably, the portion of the impermeable body 11 near the bottom is made of clay or asphalt concrete, and the other portion is made of gravel. Because the viscosity and the cost of the clay or the asphalt concrete are high, the part of the seepage-proofing body 11 close to the bottom is composed of the clay or the asphalt concrete, and the other part is composed of the gravel soil, so that the construction cost of the structure can be reduced while the seepage-proofing effect of the front-row seepage-proofing wall 2 and the rear-row seepage-proofing wall 3 is ensured.
Preferably, referring to fig. 1, the top of the dam foundation of the core rockfill dam 1 is provided with a reinforcing foundation 8, and the bottom of the impermeable body 11 is provided with a consolidation grouting layer 9. The arrangement of the reinforced foundation 8 and the consolidation grouting layer 9 can improve the bearing capacity and the permeability resistance of the core wall rock-fill dam 1, and the safety of the core wall rock-fill dam 1 is ensured to a great extent.
Preferably, in this embodiment, the reinforcing foundation 8 is an vibroflotation gravel pile.
Preferably, the front row barrier wall 2 and the rear row barrier wall 3 are plain concrete barrier walls. The front-row impervious wall 2 and the rear-row impervious wall 3 are mainly used for playing an impervious function and do not bear large load, so that the front-row impervious wall 2 and the rear-row impervious wall 3 are plain concrete impervious walls, and investment can be saved to a certain extent while normal functions and safety are ensured.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (8)
1. The utility model provides a double seepage prevention structure of deep overburden, its characterized in that includes core rock-fill dam (1), preceding row of diaphragm wall (2) and back row diaphragm wall (3), core rock-fill dam (1) set up in the top of deep overburden (4), preceding row diaphragm wall (2) with back row diaphragm wall (3) are parallel interval sets gradually along the upper reaches to the low reaches direction in deep overburden (4), just preceding row diaphragm wall (2) with back row diaphragm wall (3) are all mutually perpendicular with the flow direction of rivers, the top of preceding row diaphragm wall (2) is vertically inserted and is established in diaphragm body (11) of core rock-fill dam (1), the bottom of preceding row diaphragm wall (2) is vertically inserted and is established in bedrock layer (5) of deep overburden (4), the top of back row diaphragm wall (3) with gallery (6) at the bottom of core rock-fill dam (1) are vertical to be connected, the bottom of back row diaphragm wall (2) is connected with grout structure (7).
2. The double-row seepage-proofing structure of a deep and thick coverage layer according to claim 1, wherein the core rock-fill dam (1) comprises a rock-fill body (13), a transition body (12) and a seepage-proofing body (11), the seepage-proofing body (11) is positioned at the dam axis position of the core rock-fill dam (1), the rock-fill body (13) is positioned at two sides of the seepage-proofing body (11) and covers the top of the seepage-proofing body (11), and the transition body (12) is connected with the rock-fill body (13) and the seepage-proofing body (11).
3. Double-row impermeable structure of a deep covering according to claim 2, characterized in that the rock-fill body (13) consists of rock-fill.
4. The double-row impermeable structure of a deep covering according to claim 2, characterized in that the transition body (12) consists of sand stones.
5. The deep blanket double row barrier structure of claim 4 wherein said sand stone has a particle size of 80mm to 150mm.
6. Double-row impermeable structure of a deep covering according to claim 2, characterized in that the part of the impermeable body (11) near the bottom is made of clay or asphalt concrete, the other part is made of gravel.
7. The double-row seepage-proofing structure of the deep and thick coverage layer according to claim 1, wherein a reinforced foundation (8) is arranged at the top of the dam foundation of the core rock-fill dam (1), and a consolidation grouting layer (9) is arranged in the bottom range of the seepage-proofing body (11).
8. The double-row seepage-proofing structure of a deep covering layer according to claim 1, wherein the front row seepage-proofing wall (2) and the rear row seepage-proofing wall (3) are plain concrete seepage-proofing walls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310843889.9A CN116641344A (en) | 2023-07-10 | 2023-07-10 | Double-row seepage-proofing structure of deep covering layer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310843889.9A CN116641344A (en) | 2023-07-10 | 2023-07-10 | Double-row seepage-proofing structure of deep covering layer |
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| CN116641344A true CN116641344A (en) | 2023-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310843889.9A Pending CN116641344A (en) | 2023-07-10 | 2023-07-10 | Double-row seepage-proofing structure of deep covering layer |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166457A (en) * | 2018-01-12 | 2018-06-15 | 中国电建集团华东勘测设计研究院有限公司 | The anti-seepage linkage of the deep covering layer dam foundation and calculous soil core-wall |
| US20210254301A1 (en) * | 2018-12-14 | 2021-08-19 | Levee Lock, LLC | Membrane-Lined Wall |
| CN113338229A (en) * | 2021-06-30 | 2021-09-03 | 长江水利委员会长江科学院 | ECC core wall rock-fill dam and construction method |
-
2023
- 2023-07-10 CN CN202310843889.9A patent/CN116641344A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166457A (en) * | 2018-01-12 | 2018-06-15 | 中国电建集团华东勘测设计研究院有限公司 | The anti-seepage linkage of the deep covering layer dam foundation and calculous soil core-wall |
| US20210254301A1 (en) * | 2018-12-14 | 2021-08-19 | Levee Lock, LLC | Membrane-Lined Wall |
| CN113338229A (en) * | 2021-06-30 | 2021-09-03 | 长江水利委员会长江科学院 | ECC core wall rock-fill dam and construction method |
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