CN208251021U - Dam upstream foundation pit auxiliary seepage proof ply angles - Google Patents
Dam upstream foundation pit auxiliary seepage proof ply angles Download PDFInfo
- Publication number
- CN208251021U CN208251021U CN201820799649.8U CN201820799649U CN208251021U CN 208251021 U CN208251021 U CN 208251021U CN 201820799649 U CN201820799649 U CN 201820799649U CN 208251021 U CN208251021 U CN 208251021U
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- CN
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- Prior art keywords
- laying
- dam
- seepage proof
- antiseepage
- foundation pit
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Abstract
The utility model discloses a kind of dam upstream foundation pit auxiliary seepage proof ply angles, belong to hydraulic and hydroelectric engineering field, seepage proof curtain and the dam upstream foundation pit auxiliary seepage proof ply angles of dam foundation basement rock " self-healing ability " can more effectively be utilized by providing one kind, including dam body and seepage proof curtain, the lower section of dam body is arranged in the seepage proof curtain, and the upper end of seepage proof curtain is connected with the lower end of dam body, bottom of foundation ditch in dam body upstream side is equipped with antiseepage laying, and the antiseepage laying connects with the upstream side dam facing of dam body.The utility model passes through setting antiseepage laying, the rock cranny in seepage proof curtain region and dam foundation basement rock can be filled during infiltration by " particle " substance in antiseepage laying, therefore advantage can be provided for " self-healing ability " of seepage proof curtain and dam foundation basement rock, the practical anti-seepage effect of seepage control system is improved, and then finally reduces the infiltration flow of dam entirety.
Description
Technical field
The utility model relates to hydraulic and hydroelectric engineering technical fields more particularly to a kind of dam upstream foundation pit auxiliary seepage proof to spread
Layer structure.
Background technique
The antiseepage of general dam is essentially relying on the seepage proof curtain being arranged in the dam foundation or cut-pff wall to realize at present.Antiseepage curtain
Curtain or cut-pff wall refer at the position substantially below the dam foundation on dam axis direction and within the massif dam foundation of two sides
One of leakage preventing structure is formed by being drilled with grout hole and then grouting, by filling rock to cement injection slurries inside basic rock mass
Body crack reaches antiseepage purpose in a manner of blocking the water-permeable passage of high pressure reservoir water or increase seepage paths, and anti-seepage effect is by filling
The factors such as effect and curtain depth of slurry determine.
It is found in engineering actual observation, there is to a certain degree seepage discharge over time, become behind the dam of most of engineerings
Reduction, that is to say, that seepage proof curtain and dam foundation basement rock etc. have a degree of " self-healing ability ".Analyze its reason, it should
Be library water when flowing through rock cranny because " particle " substance carried in water plugs part penetrating passage, thereby reduce infiltration
Flow.However, it is very few for how to improve the research of " self-healing ability " of seepage proof curtain and dam foundation basement rock at present, cause to anti-
The effective use for seeping curtain and dam foundation basement rock " self-healing ability " is not enough.Therefore, it is necessary to be carried out to this for sex exploration
And research.
In addition, the induced joint of 200m or so is influenced by dam foundation consolidation grouting and joint grouting progress, is often encircleed
The case where dam foundation originally builds up and is unable to water storage, and arch dam is the structure upstream hung by the feet, empty library is likely to occur arch dam toe
Tension, the rough sledding of dam body " leaning forward " are easy to damage dam body.
In addition, the temperature field of upstream dam heel position is complex, dam concrete temperature, dam foundation ground temperature and bottom storehouse water temperature
Temperature gradient is larger, and the biggish stress for causing the position to generate larger temperature load, and then being easy to appear the position may
Further deteriorate；Dam structure is adversely affected safely.
Utility model content
The technical issues of the utility model solves is: inadequate to the utilization of seepage proof curtain and dam foundation basement rock " self-healing ability "
Abundant problem；Seepage proof curtain and the dam upstream base of dam foundation basement rock " self-healing ability " can be more effectively utilized to provide one kind
Auxiliary seepage proof ply angles are cheated, and finally improve the seepage capability of dam entirety.
The technical scheme adopted by the utility model to solve the technical problem is as follows: dam upstream foundation pit auxiliary seepage proof laying knot
The lower section of dam body, and the upper end of seepage proof curtain is arranged in structure, including dam body and seepage proof curtain, the seepage proof curtain
It is connected with the lower end of dam body, the bottom of foundation ditch in dam body upstream side is equipped with antiseepage laying, and the antiseepage is spread
Layer connects with the upstream side dam facing of dam body.
Further, the antiseepage laying successively includes the first laying, the second laying and ballast laying from the bottom to top；Institute
Stating the first laying is the first sand laying, and second laying is flyash laying or mountain flour laying.
Further, the ballast laying successively includes third laying, the 4th laying and the 5th laying from the bottom to top；Institute
Stating third laying is the second sand laying, and the 4th laying is non-woven geotextile laying, and the 5th laying is rock ballast laying.
Further, the thickness of first laying is not less than the half of antiseepage laying overall thickness.
Further, second laying with a thickness of 2m-3m.
Further, the 4th laying is at least one layer of non-woven geotextile.
Further, the thickness of the 5th laying is not less than 3m.
Further, the ballast laying successively includes third laying, the 4th laying and the 5th laying from the bottom to top；Institute
Stating third laying is non-woven geotextile laying, and the 4th laying is the second sand laying, and the 5th laying is rock ballast laying
Further, the antiseepage laying is sand laying.
Further, the seepage proof curtain is replaced by cut-pff wall.
The beneficial effects of the utility model are: the utility model by setting antiseepage laying, can by antiseepage laying "
Grain " substance blocks the rock cranny in seepage proof curtain region and the dam foundation basement rock during infiltration, therefore can be anti-
The more favorable condition of " self-healing ability " of infiltration curtain region and dam foundation basement rock offer, the anti-seepage effect after improving its self-healing, into
And finally reduce the infiltration flow of dam entirety.In addition, can also be by using the first sand laying and flyash laying or mountain flour
The laying of laying is arranged, and can be blocked for the first time by the thicker sand of relative grain size to rock cranny first in this way, then again
Secondary plugging is carried out by the thinner flyash of relative grain size or mountain flour etc., can further improve the plugging effect to rock cranny,
And then further increase the anti-seepage effect of dam entirety.
Detailed description of the invention
Fig. 1 is the schematic cross-section of foundation pit auxiliary seepage proof ply angles in dam upstream described in the utility model；
In the figure, it is marked as dam body 1, seepage proof curtain 2, upstream side dam facing 3, the first laying 4, the second laying 5, third are spread
Layer the 6, the 4th laying 7, the 5th laying 8, dam foundation basement rock 9.
Specific embodiment
The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, foundation pit auxiliary seepage proof ply angles in dam upstream described in the utility model, including dam body
1 and seepage proof curtain 2, the seepage proof curtain 2 lower section of dam body 1, and the upper end of seepage proof curtain 2 and dam body are set
1 lower end is connected, and the bottom of foundation ditch in 1 upstream side of dam body is equipped with antiseepage laying, and the antiseepage laying and dam
The upstream side dam facing 3 of dam body 1 connects.Wherein, seepage proof curtain 2 is main leakage preventing structure；It is not general, seepage proof curtain 2
It can be replaced by cut-pff wall.
Antiseepage laying in the utility model, for the bottom of foundation ditch for being laid on 1 upstream side of dam body, such as institute in attached drawing 1
Show.Usual antiseepage laying is in plane layer structure after laying, and by the upstream side dam facing 3 with dam body 1 after its laying
Connect, remaining edge of antiseepage laying connects with the excavation line of dam upstream and connects with the bank of river two sides.Separately
Outside, since 9 cutting depth of dam foundation basement rock under normal conditions at the root position of dam body 1 is most deep, and more toward upstream,
Its cutting depth is more shallow, i.e., referring to shown in attached drawing 1: in the upstream of dam body, along water (flow) direction, excavation line is in downward
Inclination trend, and excavation line theoretically can be the ramp structure that inclination declines and be also possible to ladder structure drop, as shown in figure 1
Shown in specific example its excavation line be in ladder structure drop.In this case, antiseepage laying is corresponding from bottom to up
Tiling area will be gradually increased.
Wherein, the effect of antiseepage laying is that have in certain particle size range by being laid with to bottom of foundation ditch in the utility model
" particle " substance played by " particle " substance in antiseepage laying to rock mass and then in the flow event after dam water storage
The plugging action in crack, and then advantage is provided for " self-healing ability " of seepage proof curtain and dam foundation basement rock, improve its self-healing
Anti-seepage effect afterwards, and finally reduce the infiltration flow of dam entirety.Antiseepage laying can use single layer structure in the application,
Lamination layer structure can be used, as one layer of sand laying integrally can be only arranged in antiseepage laying.
More specifically, in order to improve the effect of antiseepage laying, being preferably provided with antiseepage laying is lamination layer structure, such as referring to attached
Shown in Fig. 1, the antiseepage laying can be set gradually from the bottom to top as the first laying 4, the second laying 5 and ballast laying；It is described
First laying 4 is the first sand laying, and second laying 5 is flyash laying or mountain flour laying.Wherein the first laying 4 uses
Sand laying, i.e., the one layer of ply angles formed after being laid with by sand, the purpose is to utilize certain particle size range in sand laying
Interior particulate matter carries out first plugging action to rock cranny；And flyash laying or mountain flour paving are adopted as in the second laying 3
Layer, i.e., the one layer of ply angles formed after being laid with by flyash or mountain flour；The purpose is to for using in flyash or mountain flour
The smaller particulate matter of partial size relative to sand, in this way when the larger particles in sand laying seal rock cranny for the first time
After stifled effect, secondary plugging can be carried out by the particulate matter of smaller particle again, to further increase the plugging action to rock cranny.
And the purpose of ballast laying is mainly used for carrying out corresponding first laying 4 and the second laying 5 gravity pressure, to reduce lower section
Flyash laying or mountain flour laying and the first sand laying etc. under water due to being disturbed upstream direction float feelings
Condition.
Certainly, without loss of generality, the first above-mentioned laying 4, the second laying 5 in addition to can be used corresponding sand laying or
Outside flyash laying and mountain flour laying, it can also be replaced by the other materials ply angles that can reach corresponding effect.
Theoretically, ballast laying can carry out laying setting using various laminated materials, such as can be only with one layer of rock ballast
Laying.But in order to improve to the effect of the ballast of the first laying 4 and the second laying 5, at the same avoid flyash or mountain flour etc. to
On across ballast laying, the utility model is preferably using following specific setting: referring to shown in attached drawing 1, the ballast laying by
Under it is supreme successively include third laying 6, the 4th laying 7 and the 5th laying 8；The third laying 6 is the second sand laying, described
4th laying 7 is non-woven geotextile laying, and the 5th laying 8 is rock ballast laying.Wherein, the effect of the second sand laying is main
It is to play transitional function；And non-woven geotextile laying is then primarily to play better buffer action, with prevent flyash or
Person's mountain flour etc. moves up；And rock ballast laying is then provided enough primarily to providing biggish ballast effect with each layer downwards
Gravitational pressure and disturbance rejection effect.Certainly, without loss of generality, the second sand laying and the 4th that above-mentioned third laying 6 uses
The commutative setting of non-woven geotextile laying used by laying；Non-woven geotextile laying is set by third laying 6, by the 4th
Laying 7 is set as the second sand laying.
Auxiliary seepage proof ply angles in the utility model can be used as the supplement or auxiliary of existing dam foundation leakage preventing structure
Help structure, can on the basis of original leakage preventing structure based on seepage proof curtain or cut-pff wall, then upstream foundation pit paving fill out
To improve the antiseepage ply angles of seepage proof curtain and dam foundation basement rock " self-healing ability ", it is anti-that main-auxiliary joint thus can be formed
Structure is seeped, the purpose for improving dam entirety anti-seepage effect is finally reached.
In addition, antiseepage ply angles of the utility model due to being equipped with respective thickness in the foundation pit of upstream, for
For the construction of induced joint, before dam water storage, also certain support effect can be played to dam body by antiseepage ply angles, into
And the risk for occurring arch dam toe tension at empty library can be reduced, and reduce and damage caused by dam body.
In addition, the utility model due to upstream dam call in person before paving be filled with the materials such as sand, can be to the dam foundation near
Upstream dam facing plays the role of certain " heat preservation ", and dam runtime upstream dam facing temperature will be risen than original bottom storehouse water temperature
Height can reduce the temperature gradient at the position, be conducive to the tensile stress for reducing position appearance.
In addition, under normal circumstances, the utility model limits the thickness of each laying there is no stringent.In order to reach more preferably
Effect, preferably using following setting in the utility model:
The thickness that the first laying 4 is arranged is not less than the half of antiseepage laying overall thickness.
Be arranged the second laying 5 with a thickness of 2m-3m.
4th laying 7 is set at least one layer of non-woven geotextile.
The thickness of 5th laying 8 is set not less than 3m.
Such as, by taking antiseepage laying overall thickness is 32m as an example, setting gradually the first sand overlay thickness from the bottom to top is 22m, if
Setting flyash laying the latter's mountain flour overlay thickness is 2m, and the second sand overlay thickness of setting is 5m, and two layers of non-woven geotextile is arranged
Layer, setting rock ballast overlay thickness are 3m.
Claims (10)
1. dam upstream foundation pit auxiliary seepage proof ply angles, including dam body (1) and seepage proof curtain (2), the seepage proof curtain
(2) it is arranged in the lower section of dam body (1), and the upper end of seepage proof curtain (2) is connected with the lower end of dam body (1), it is special
Sign is: the bottom of foundation ditch in dam body (1) upstream side is equipped with antiseepage laying, and the antiseepage laying and dam body
(1) upstream side dam facing (3) connects.
2. foundation pit auxiliary seepage proof ply angles in dam upstream as described in claim 1, it is characterised in that: the antiseepage laying by
Under it is supreme successively include the first laying (4), the second laying (5) and ballast laying；First laying (4) is the first sand paving
Layer, second laying (5) are flyash laying or mountain flour laying.
3. foundation pit auxiliary seepage proof ply angles in dam upstream as claimed in claim 2, it is characterised in that: the ballast laying by
Under it is supreme successively include third laying (6), the 4th laying (7) and the 5th laying (8)；The third laying (6) is the second sand
Laying, the 4th laying (7) are non-woven geotextile laying, and the 5th laying (8) is rock ballast laying.
4. foundation pit auxiliary seepage proof ply angles in dam upstream as claimed in claim 3, it is characterised in that: first laying
(4) thickness is not less than the half of antiseepage laying overall thickness.
5. foundation pit auxiliary seepage proof ply angles in dam upstream as claimed in claim 3, it is characterised in that: second laying
(5) with a thickness of 2m-3m.
6. foundation pit auxiliary seepage proof ply angles in dam upstream as claimed in claim 3, it is characterised in that: the 4th laying
It (7) is at least one layer of non-woven geotextile.
7. foundation pit auxiliary seepage proof ply angles in dam upstream as claimed in claim 3, it is characterised in that: the 5th laying
(8) thickness is not less than 3m.
8. foundation pit auxiliary seepage proof ply angles in dam upstream as claimed in claim 2, it is characterised in that: the ballast laying by
Under it is supreme successively include third laying (6), the 4th laying (7) and the 5th laying (8)；The third laying (6) is nonwoven geotechnique
Cloth laying, the 4th laying (7) are the second sand laying, and the 5th laying (8) is rock ballast laying.
9. foundation pit auxiliary seepage proof ply angles in dam upstream as described in claim 1, it is characterised in that: the antiseepage laying is
Sand laying.
10. foundation pit auxiliary seepage proof ply angles in dam upstream as in one of claimed in any of claims 1 to 9, it is characterised in that:
The seepage proof curtain is replaced by cut-pff wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820799649.8U CN208251021U (en) | 2018-05-25 | 2018-05-25 | Dam upstream foundation pit auxiliary seepage proof ply angles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820799649.8U CN208251021U (en) | 2018-05-25 | 2018-05-25 | Dam upstream foundation pit auxiliary seepage proof ply angles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208251021U true CN208251021U (en) | 2018-12-18 |
Family
ID=64651310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820799649.8U Withdrawn - After Issue CN208251021U (en) | 2018-05-25 | 2018-05-25 | Dam upstream foundation pit auxiliary seepage proof ply angles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208251021U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108532543A (en) * | 2018-05-25 | 2018-09-14 | 中国电建集团成都勘测设计研究院有限公司 | Dam upstream foundation pit auxiliary seepage proof ply angles |
-
2018
- 2018-05-25 CN CN201820799649.8U patent/CN208251021U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108532543A (en) * | 2018-05-25 | 2018-09-14 | 中国电建集团成都勘测设计研究院有限公司 | Dam upstream foundation pit auxiliary seepage proof ply angles |
| CN108532543B (en) * | 2018-05-25 | 2023-09-26 | 中国电建集团成都勘测设计研究院有限公司 | Auxiliary anti-seepage layer-paving structure for foundation pit on upstream of dam |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181218 Effective date of abandoning: 20230926 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20181218 Effective date of abandoning: 20230926 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |