CN105297679B - A kind of anti-seepage method and structure on rock-fill dams upstream face top layer - Google Patents
A kind of anti-seepage method and structure on rock-fill dams upstream face top layer Download PDFInfo
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- CN105297679B CN105297679B CN201510134081.9A CN201510134081A CN105297679B CN 105297679 B CN105297679 B CN 105297679B CN 201510134081 A CN201510134081 A CN 201510134081A CN 105297679 B CN105297679 B CN 105297679B
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Abstract
The invention discloses a kind of anti-seepage method and structure on rock-fill dams upstream face top layer, its method is constructed according to the following steps：Carry out concrete pedestal and dam body enrockment foundation plane to excavate, complete the concreting of concrete pedestal and copper seal is pre-buried and protection；Seepage proof curtain construction is carried out after concrete pedestal meets intensity requirement；Carry out drainage in dam body body construction；Carry out the placement grinding of rockfill and blotter；The construction of top layer flexible barrier body is carried out after the certain elevation of dam embankment and settlement stability；Wire netting is furnished in dam facing, block stone is then laid in wire netting；Top layer flexibility bitumen construction is carried out using the mode of pouring into；Repeat the above steps until construction terminates.The present invention serves the effect of multilayer antiseepage, and because top layer impervious body is flexible structure, can be well adapted for the deformation of dam body rockfill materials, while simplifies the operational procedure of impervious body, have it is structurally simple, economical and be easy to construction the characteristics of.
Description
Technical field
The present invention relates to a kind of anti-seepage method and structure on rock-fill dams upstream face top layer, belongs to hydraulic engineering seepage control technique neck
Domain.
Background technology
Rock-fill dams are also tended to due to that can have obvious advantage because ground is drawn materials using local material in construction
There is construction interference, lack the technical problem of the formation such as Impervious Materials or impervious body destruction.
Existing rock-fill dams leakage preventing structure is that impervious body is constructed in dam a bit, and it can set impervious body in dam facing also to have.
But leakage passage can be formed often due to impervious body deformation and stockpile deformation have larger difference in engineering construction, or
The unfavorable factors such as the construction interference effect duration of a project of rockfill and impervious body.Therefore existing rock-fill dams leakage preventing structure is not still
Enough ideals.
The content of the invention
It is an object of the present invention to provide a kind of anti-seepage method and structure on rock-fill dams upstream face top layer, preferably to solve
The certainly antiseepage problem of engineering, and shorten the duration of a project simultaneously, so as to overcome the deficiencies in the prior art.
The technical proposal of the invention is realized in this way：
A kind of anti-seepage method on rock-fill dams upstream face top layer of the present invention is that this method is constructed according to the following steps：
Step 1: carrying out concrete pedestal and dam body enrockment foundation plane excavation, the concreting of concrete pedestal is completed
With copper seal it is pre-buried and protection；
Step 2: seepage proof curtain construction is carried out after concrete pedestal meets intensity requirement；
Step 3: carry out drainage in dam body body construction；
Step 4: carry out the placement grinding of rockfill and blotter；
Step 5: after the certain elevation of dam embankment and settlement stability, wire netting is furnished in dam facing, then in wire netting
Block stone is laid, top layer flexibility bitumen construction is carried out using the mode of pouring into；
Repeat step four to five is until construction terminates.
In preceding method, wire netting is to use to weave with anti-oxidant and anti-aging galvanized metal material in the step 5
Form, the bottom surface of wire netting is to grow 60~150cm, wide 60~150cm rectangle, and turning over 20~40cm on the side of rectangle four forms disk
Shape；The block stone particle diameter of laying is 20~50cm in wire netting；Saturation compression strength cannot be less than 40MPa.
In preceding method, top layer flexibility pitch thickness is 6~30cm in the step 5, antiseepage coefficient cannot be greater than i ×
10-6cm/s。
In preceding method, the top layer flexibility pitch is connected with concrete pedestal by copper seal, forms the anti-of closing
Ooze body.
In preceding method, the copper seal thickness is 1.6mm, nose-shaped raised high 5cm, wide 2cm, and the bending of two edges is wide
Spend for 3cm.
A kind of leakage preventing structure on the rock-fill dams upstream face top layer of the invention formed according to the above method, including stockpile shape
Into dam body；Dam body bottom is provided with displacement hull, and the upstream face of dam body is provided with blotter, and blotter surface is provided with flexible barrier
Connection is closed in body, flexible barrier body bottom with being located at the concrete pedestal of base of dam through copper water stop；Concrete pedestal bottom is provided with
Seepage proof curtain.
In aforementioned structure, the flexible barrier body includes the flexible cushion being made up of the block stone that metal net bag rises, flexible pad
Layer is provided with top layer flexibility pitch.
In aforementioned structure, the dam body is highly not more than 150 meters, and upstream dam slope is not more than 1:1.7.
By adopting the above-described technical solution, the present invention is compared with prior art, the present invention on rock-fill dams top layer by setting
Flexible barrier body and the blotter of concrete pedestal structure and bottom are put, serves the effect of multilayer antiseepage, and due to table
Layer impervious body is flexible structure, can be well adapted for the deformation of dam body rockfill materials, while simplify the operational procedure of impervious body.
Therefore, compared with prior art, the present invention not only has and can effectively solve the problems, such as the advantages of project seepage controlling the present invention, but also has
Have the advantages that the duration of a project it is short, it is structurally simple, economical and be easy to construction.
Brief description of the drawings
Fig. 1 is the cross section structure schematic diagram of the present invention；
Fig. 2 is the flexible barrier body structural representation of the present invention；
Fig. 3 is the flexible barrier surface layer flexibility pitch and concrete pedestal connection diagram of the present invention.
Mark in accompanying drawing for：1- flexible barrier bodies, 2- concrete pedestals, 3- blotters, 4- stockpiles, 5- drainings
Body, 6- seepage proof curtains, 7- top layers flexibility pitch, 8- block stones, 9- wire nettings, 10- copper water stops.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples, but not as to any of the present invention
Limitation.
A kind of anti-seepage method on rock-fill dams upstream face top layer of the present invention, constructs according to the following steps as shown in Figures 1 to 3：
Step 1: carrying out concrete pedestal and dam body enrockment foundation plane excavation, the concreting of concrete pedestal is completed
With copper seal it is pre-buried and protection；
Step 2: seepage proof curtain construction is carried out after concrete pedestal meets intensity requirement；
Step 3: carry out drainage in dam body body construction；
Step 4: carry out the placement grinding of rockfill and blotter；
Step 5: after the certain elevation of dam embankment and settlement stability, wire netting is furnished in dam facing, then in wire netting
Block stone is laid, top layer flexibility bitumen construction is carried out using the mode of pouring into；
Repeat step four to five is until construction terminates.
Wire netting is to use to form with anti-oxidant and anti-aging galvanized metal material braiding in aforementioned method steps five, gold
The bottom surface of category net is long 60~150cm, wide 60~150cm rectangle, and turning over 20~40cm on the side of rectangle four forms dish type；Wire netting
The block stone particle diameter of interior laying is 20~50cm；Saturation compression strength cannot be less than 40MPa.Flexibility pitch thickness in top layer in step 5
For 6~30cm, antiseepage coefficient cannot be greater than i × 10-6cm/s.Top layer flexibility pitch and concrete pedestal are connected by copper seal
Connect, form the impervious body of closing.Copper seal thickness is 1.6mm, nose-shaped raised high 5cm, wide 2cm, the bending width of two edges
For 3cm.
The leakage preventing structure on a kind of rock-fill dams upstream face top layer of the invention formed according to the above method, such as the institute of Fig. 1~3
Show, the structure includes the dam body that stockpile 4 is formed；Dam body bottom is provided with displacement hull 5, and the upstream face of dam body is provided with blotter 3,
The surface of blotter 3 is provided with flexible barrier body 1, and the bottom of flexible barrier body 1 is with being located at the concrete pedestal 2 of base of dam through copper water stop
10 closing connections；The bottom of concrete pedestal 2 is provided with seepage proof curtain 6.Flexible barrier body 1 is included by the structure of block stone 8 the pocket of wire netting 9
Into flexible cushion, flexible cushion is provided with top layer flexibility pitch 7.Dam body is highly not more than 150 meters, and upstream dam slope is not more than 1:
1.7。
Embodiment
As shown in Figure 1, Figure 2 and Figure 3, a kind of rock-fill dams top layer flexible barrier structure of the present invention, including it is flexible anti-
Ooze body 1, concrete pedestal 2, blotter 3, stockpile 4, displacement hull 5 and seepage proof curtain 6.The flexible drip in the top layer of flexible barrier body 1
Green grass or young crops 7 and concrete pedestal 2 are connected by copper water stop 10, form the impervious body of closing.
Wherein, flexibility pitch in top layer is using the asphalt material requirement of existing Regulations requirement, flexible pitch thickness
For 6~30cm, antiseepage coefficient cannot be greater than i × 10-6cm/s；Block stone saturation compression strength in flexible barrier body cannot be less than
40MPa, particle diameter are 20~50cm；Wire be with anti-oxidant and aging galvanized metal material, its material property, overlap joint and
Connection should meet Regulations requirement；The thickness of copper water stop 10 is 1.6mm, nose-shaped raised high 5cm, wide 2cm, two edges it is curved
Folding width is 3cm.Stockpile, draining and blotter meet rock-fill dams dam material characteristic requirements.
Top layer flexible barrier body block stone should be placed in metallic netted structural, and its height is 20~40cm, and length 60~
150cm, 60~150cm of width, the wire netting braiding in other faces beyond skim-coat should be completed before construction.
During construction, concrete pedestal is carried out first and dam body enrockment foundation plane excavates, completes the concrete of concrete pedestal 2
Pour with copper seal it is pre-buried and protection；Then the placement grinding of drainage in dam body body 5, rockfill 4 and blotter 3 is carried out, is treated
The construction of top layer flexible barrier body is carried out after the certain elevation of dam embankment and settlement stability, is made first in dam facing ornaments wire
Wire netting, block stone is then furnished in net, it is and as far as possible closely knit, top layer flexibility pitch is finally carried out using penetration type method and applied
Work, seepage proof curtain 6 can construct after concrete pedestal 2 meets intensity requirement；Repeat the above steps, until construction terminates.
The present invention relies primarily on top layer pitch antiseepage, passes through copper sheet sealing and concrete pedestal phase in riverbed and bank slope position
Connect, play overall antiseepage effect.The protective slope structure of flexible barrier body wire netting and block stone composition simultaneously, preferably ensure that upstream
The dam slide stabilization problem of dam facing；The blotter of bottom, which plays, prevents that blending reverse filter effect solves the problems, such as the seepage stability of dam body,
Displacement hull in dam body forms free drainage passage, reduces the head in dam.
Embodiments of the present invention are not limited to above-described embodiment, and that is made on the premise of present inventive concept is not departed from is various
Change is belonged within protection scope of the present invention.
Claims (8)
- A kind of 1. anti-seepage method on rock-fill dams upstream face top layer, it is characterised in that：This method is constructed according to the following steps：Step 1: carrying out concrete pedestal and dam body enrockment foundation plane excavation, complete the concreting of concrete pedestal and stop Water copper sheet is pre-buried and protects；Step 2: seepage proof curtain construction is carried out after concrete pedestal meets intensity requirement；Step 3: carry out drainage in dam body body construction；Step 4: carry out the placement grinding of rockfill and blotter；Step 5: after the certain elevation of dam embankment and settlement stability, wire netting is furnished in dam facing, is then laid in wire netting Block stone, top layer flexibility bitumen construction is carried out using the mode of pouring into；Repeat step four to five is until construction terminates.
- 2. the anti-seepage method on rock-fill dams upstream face top layer according to claim 1, it is characterised in that：Metal in the step 5 Net is to use to form with anti-oxidant and anti-aging galvanized metal material braiding, and the bottom surface of wire netting is long 60~150cm, wide by 60 ~150cm rectangle, 20~40cm is turned on the side of rectangle four and forms dish type；The block stone particle diameter of laying is 20~50cm in wire netting； Saturation compression strength cannot be less than 40MPa.
- 3. the anti-seepage method on rock-fill dams upstream face top layer according to claim 1, it is characterised in that：Top layer in the step 5 Flexible pitch thickness is 6~30cm.
- 4. the anti-seepage method on rock-fill dams upstream face top layer according to claim 1, it is characterised in that：The top layer flexibility pitch Connected with concrete pedestal by copper seal, form the impervious body of closing.
- 5. the anti-seepage method on rock-fill dams upstream face top layer according to claim 4, it is characterised in that：The copper seal thickness For 1.6mm, the raised high 5cm of nose-shaped, wide 2cm, the bending width of two edges is 3cm.
- A kind of 6. antiseepage knot on the rock-fill dams upstream face top layer formed according to Claims 1 to 5 any claim methods described Structure, including stockpile（4）The dam body of formation；It is characterized in that：Displacement hull is provided with dam body bottom（5）, in the upstream face of dam body Provided with blotter（3）, in blotter（3）Surface is provided with flexible barrier body（1）, flexible barrier body（1）Bottom is with being located at dam The concrete pedestal of pin（2）Through copper water stop（10）Closing connection；In concrete pedestal（2）Bottom is provided with seepage proof curtain（6）.
- 7. the leakage preventing structure on rock-fill dams upstream face top layer according to claim 6, it is characterised in that：The flexible barrier body （1）Including by wire netting（9）The block stone that pocket rises（8）The flexible cushion of composition, flexible cushion are provided with top layer flexibility pitch（7）.
- 8. the leakage preventing structure on rock-fill dams upstream face top layer according to claim 6, it is characterised in that：The dam body is highly little In 150 meters, upstream dam slope is not more than 1:1.7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510134081.9A CN105297679B (en) | 2015-03-26 | 2015-03-26 | A kind of anti-seepage method and structure on rock-fill dams upstream face top layer |
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| CN201510134081.9A CN105297679B (en) | 2015-03-26 | 2015-03-26 | A kind of anti-seepage method and structure on rock-fill dams upstream face top layer |
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| CN105297679A CN105297679A (en) | 2016-02-03 |
| CN105297679B true CN105297679B (en) | 2017-11-28 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951557B (en) * | 2018-08-20 | 2023-09-08 | 云南省红河州水利水电勘察设计研究院 | Irrigation and flood control dam for hydraulic engineering |
| CN109706895B (en) * | 2019-01-05 | 2020-07-07 | 黄河勘测规划设计研究院有限公司 | Reverse osmotic pressure treatment method for construction period of face dam on narrow river valley in rainy region |
| CN110965527A (en) * | 2019-11-14 | 2020-04-07 | 湖南省汇杰勘测设计股份有限公司 | Construction method of waterproof layer of upstream panel of concrete panel rock-fill dam |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4508471A (en) * | 1982-03-19 | 1985-04-02 | Bitumarin B.V. | Method and machine for the layered placing of core material and of the adjacent transitional material for dams |
| SU1673677A1 (en) * | 1989-05-16 | 1991-08-30 | Карагандинский политехнический институт | Method for building antifiltration screen of dam |
| CN102587322A (en) * | 2011-01-11 | 2012-07-18 | 中国水利水电建设工程咨询公司 | Metal mesh box revetment structure of earth-rock dam and construction method of metal mesh box revetment structure |
| CN104018471A (en) * | 2014-06-16 | 2014-09-03 | 中国电建集团成都勘测设计研究院有限公司 | Blocking overflow dam structure |
-
2015
- 2015-03-26 CN CN201510134081.9A patent/CN105297679B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4508471A (en) * | 1982-03-19 | 1985-04-02 | Bitumarin B.V. | Method and machine for the layered placing of core material and of the adjacent transitional material for dams |
| SU1673677A1 (en) * | 1989-05-16 | 1991-08-30 | Карагандинский политехнический институт | Method for building antifiltration screen of dam |
| CN102587322A (en) * | 2011-01-11 | 2012-07-18 | 中国水利水电建设工程咨询公司 | Metal mesh box revetment structure of earth-rock dam and construction method of metal mesh box revetment structure |
| CN104018471A (en) * | 2014-06-16 | 2014-09-03 | 中国电建集团成都勘测设计研究院有限公司 | Blocking overflow dam structure |
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| CN105297679A (en) | 2016-02-03 |
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