CN207537975U - Deep covering layer top panel Rockfill Dam based moisture barrier structure - Google Patents
Deep covering layer top panel Rockfill Dam based moisture barrier structure Download PDFInfo
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- CN207537975U CN207537975U CN201721647875.6U CN201721647875U CN207537975U CN 207537975 U CN207537975 U CN 207537975U CN 201721647875 U CN201721647875 U CN 201721647875U CN 207537975 U CN207537975 U CN 207537975U
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Abstract
The utility model belongs to hydraulic and hydroelectric engineering field, specifically discloses one kind securely and reliably, and can reduce the deep covering layer top panel Rockfill Dam based moisture barrier structure of engineering excavation amount.The seepage prevention of dam founda structure, including concrete cut, the compound dam foundation, toe board and panel；The compound dam foundation includes at least two rows of along river, to the broken stone pile for being spaced apart setting, the broken stone pile that often row's broken stone pile is mainly distributed by least two along dam axially spaced-apart forms；Broken stone pile includes the stake holes being arranged in the dam foundation coating in concrete cut downstream and the rubble being filled in stake holes.By setting broken stone pile in the dam foundation coating in concrete cut downstream, by broken stone pile into line replacement and the compacted composite foundation formed, deformation modulus of bedrock and bearing capacity can not only be improved, reduces differential settlement, dam foundation earthquake liquefaction is also can effectively prevent, reliability and safety are higher.
Description
Technical field
The utility model belongs to hydraulic and hydroelectric engineering field, and in particular to a kind of deep covering layer top panel rock-fill dams dam foundation
Leakage preventing structure.
Background technology
Since concrete face rockfill dam can reduce dam body section, shorten the construction period, cost saving, in state
It is widely applied in inside and outside construction of hydropower plant.At present, the toe board of most rock all build base in both at home and abroad
On rock, since coating can generate larger sedimentation and differential settlement, it is built in rock on deeply covered layer often
There are antiseepage poor reliability, toe board and slab joints to deform the problems such as excessive, therefore the panel heap directly built on the cover layer
Masonry dam is few in number, and it is less more than the rock of 150m that height of dam is particularly built on deep covering layer.China's water can provide
The riverbed in the abundant western river area of source distribution has thickness is deep, loosely organized, water penetration is strong etc. mostly there are coating
Feature, it is an important technology problem in construction of hydropower plant directly to build rock using coating.Build face at present
During sheetpile masonry dam, all or part is taken to excavate the coating dam foundation, the processing mode that coating is excavated to basement rock at toe board,
There are the drawbacks such as engineering excavation amount is big, claim for eot, investment increase.
Utility model content
It is safe and reliable the technical problem to be solved by the present invention is to provide one kind, and engineering excavation amount can be reduced
Deep covering layer top panel Rockfill Dam based moisture barrier structure.
Technical solution is used by the utility model solves its technical problem：The deep covering layer top panel rock-fill dams dam foundation
Leakage preventing structure, including be set in the dam foundation coating of dam body upstream concrete cut, be arranged under concrete cut
The compound dam foundation of trip, the toe board that is arranged on the compound dam foundation and is connected with concrete cut and it is arranged on dam body upstream
Surface and the panel being connected with toe board；The compound dam foundation include it is at least two rows of along river to the rubble for being spaced apart setting
Stake is often arranged the broken stone pile that broken stone pile is mainly distributed by least two along dam axially spaced-apart and is formed；The broken stone pile includes being arranged on
Stake holes in the dam foundation coating in concrete cut downstream and the rubble being filled in stake holes.
Further, the thickness of the concrete cut is 0.8~1.4m.
Further, the compound dam foundation further includes blotter, the blotter is layed in institute at the top of broken stone pile
Dam foundation cover surface on, TGXG is provided in blotter.
Further, the toe board is connected by connecting plate with concrete cut, the concrete cut and company
Water sealing structure is both provided at connecting portion at connecting portion between fishplate bar and between connecting plate and toe board.
Further, the quantity of the connecting plate is 2~3 pieces, each connecting plate, to being sequentially connected together, connects along river
Water sealing structure is provided at connecting sewing between fishplate bar and connecting plate；The length of connecting plate be 2~5m, the thickness and toe of connecting plate
The thickness of plate level section is equal.
Further, the compound dam foundation further includes the anti-filter bed of material being layed on blotter, the anti-filter bed of material
Composite geo-membrane is provided between blotter, the connecting plate and toe board are arranged on the anti-filter bed of material；The concrete is prevented
Ooze the surface of dam foundation coating of wall upstream, the top surface of concrete cut, the upper surface of connecting plate, toe board upper surface and
Toe board, which is connected with panel on the upper surface at position, is provided with the particulate bed of material, the particulate bed of material be laid with by inviscid fine granules and
Into being provided with composite geo-membrane on the bottom surface of the particulate bed of material, clay layer be equipped on the top surface of the particulate bed of material.
Further, the inviscid fine granules are one or more of silt, Extra-fine sand and flyash.
Further, along the downstream for being located at toe board to last row's broken stone pile of arrangement along river, and with toe board x-ray apart
30~50m；Broken stone pile between concrete cut and toe board x-ray is uniformly distributed, and each row positioned at toe board x-ray downstream is broken
Row's spacing and stake spacing between stone mar are from upstream to downstream and are sequentially increased, and row's spacing is between adjacent two rows of broken stone piles
Distance, the stake spacing is often arranges the distance between adjacent two broken stone piles in broken stone pile.
Further, the stake holes is cylindrical hole, a diameter of 1~2m；The stake spacing is 1~3m.
The beneficial effects of the utility model are：By setting rubble in the dam foundation coating in concrete cut downstream
Stake by broken stone pile into line replacement and the compacted composite foundation formed, can not only improve deformation modulus of bedrock and bearing capacity, reduce not
Uniform settlement, moreover it is possible to effectively prevent dam foundation earthquake liquefaction, reliability and safety are higher；Meanwhile reduce engineering excavation amount, it contracts
The short duration, reduce engineering cost.By being laid with blotter at the top of broken stone pile, and geotechnological lattice are laid in blotter
Grid form the reinforcement mattress layer in similar road engineering Net Pile Composite Ground, can be homogenized upper load and distribute, further subtract
Small dam foundation alluvial deposit foundation sedimentation and stake soil relative settlement.It can be coordinated between concrete cut and toe board not by connecting plate
Uniform settlement.Due to being laid with the particulate bed of material of inviscid fine granules composition on connecting plate, even if at each connecting portion
Sealing is destroyed, and the leak paths that inviscid fine granules can deposit between seam reduce the leakage passage being likely to occur, carry
High antiseepage reliability；The nothing of the anti-filter bed of material and composite geo-membrane of connecting plate and toe board lower part between each connecting portion is set to glue
Property fine granules have the function of filter protection, further improve reliability and the safety of leakage preventing structure.
Description of the drawings
Fig. 1 is the implementation structure diagram of the utility model；
In figure label for：Concrete cut 1, broken stone pile 2, connecting plate 3, toe board 4, composite geo-membrane 5, the particulate bed of material 6,
Clay layer 7, the anti-filter bed of material 8, toe board x-ray 9, blotter 10, TGXG 11, dam foundation coating 12, panel 13, connecting sewing
14th, dam body 15.
Specific embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, deep covering layer top panel Rockfill Dam based moisture barrier structure, the dam including being set to 15 upstream of dam body
Concrete cut 1 in base coating 12, is arranged on the compound dam foundation at the compound dam foundation for being arranged on 1 downstream of concrete cut
The upper and toe board 4 that is connected with concrete cut 1 and it is arranged on 15 upstream face of dam body and the face being connected with toe board 4
Plate 13；The compound dam foundation include it is at least two rows of along to the broken stone pile 2 for being spaced apart setting, often arranged along river broken stone pile 2 mainly by
At least two broken stone piles 2 being distributed along dam axially spaced-apart form；The broken stone pile 2 includes being arranged on 1 downstream of concrete cut
Dam foundation coating 12 in stake holes and the rubble that is filled in stake holes.
Wherein, the thickness of concrete cut 1 is preferably 0.8~1.4m.Set broken stone pile 2 be mainly used for displacement and
The dam foundation coating 12 in compacted 1 downstream of concrete cut with form compound foundation, improves deformation modulus of bedrock and bearing capacity,
Differential settlement is reduced, while also can effectively prevent dam foundation earthquake liquefaction；By the reinforcement of broken stone pile 2, therefore reduce to dam
The excavated volume of base coating 12, shortens the duration, reduces engineering cost.
Arrangement of the broken stone pile 2 in dam foundation coating 12 can be a variety of, it is preferred to use in the following manner is arranged,
Again as shown in Figure 1, making to be located at the downstream of toe board 4, and make itself and 9 phase of toe board x-ray to last row's broken stone pile 2 of arrangement along river
Away from 30~50m；Broken stone pile 2 between concrete cut 1 and toe board x-ray 9 is uniformly distributed, positioned at 9 downstream of toe board x-ray
Row's spacing and stake spacing between each row's broken stone pile 2 are from upstream to downstream and are sequentially increased, and row's spacing is broken for adjacent two rows
The distance between stone mar 2, the stake spacing are each in same row often to arrange the distance between adjacent two broken stone piles 2 in broken stone pile 2
Stake spacing between broken stone pile 2 is equal.Above structure connection and reasonable arrangement can give full play to the effect of every broken stone pile 2, ensure that
To the stiffening effect of dam foundation coating 12.
Preferably, the stake holes be cylindrical hole, a diameter of 1~2m；The stake spacing is 1~3m.
As a kind of preferred embodiment of the utility model, then as shown in Figure 1, the compound dam foundation further includes blotter
10, the blotter 10 is layed on 12 surface of dam foundation coating at 2 top place of broken stone pile, is provided in blotter 10
TGXG 11.By being laid with blotter 10 and TGXG 11 being laid in blotter 10, similar road work is formd
Upper load, can be homogenized and distribute by the reinforcement mattress layer in journey Net Pile Composite Ground, further reduce 12 ground of dam foundation coating
Sedimentation and stake soil relative settlement.
In order to coordinate the differential settlement between concrete cut 1 and toe board 4, then as shown in Figure 1, the toe board 4
It is connected by connecting plate 3 with concrete cut 1, at the connecting portion between the concrete cut 1 and connecting plate 3 and company
Water sealing structure is both provided at connecting portion between fishplate bar 3 and toe board 4.Connecting plate 3 pours setting, can usually polylith be set to connect
Fishplate bar 3 is attached, to provide trade-off effect.
Preferably, the quantity of the connecting plate 3 is 2~3 pieces, and each connecting plate 3, to being sequentially connected together, is connected along river
Water sealing structure is provided at connecting sewing 14 between plate 3 and connecting plate 3；The length of connecting plate 3 be 2~5m, the thickness of connecting plate 3
It is equal with the thickness of 4 horizontal segment of toe board；
As another preferred embodiment of the utility model, then as shown in Figure 1, the compound dam foundation further include be layed in it is broken
The anti-filter bed of material 8 on stone bed course 10 is provided with composite geo-membrane 5, the connection between the anti-filter bed of material 8 and blotter 10
Plate 3 and toe board 4 are arranged on the anti-filter bed of material 8；The surface of the dam foundation coating 12 of 1 upstream of concrete cut, concrete
The top surface of cut-pff wall 1, the upper surface of connecting plate 3, the upper surface of toe board 4 and toe board 4 are connected the upper table at position with panel 13
The particulate bed of material 6 is provided on face, the particulate bed of material 6 is laid with by inviscid fine granules, is set on the bottom surface of the particulate bed of material 6
There is composite geo-membrane 5, clay layer 7 is equipped on the top surface of the particulate bed of material 6.Wherein, the inviscid fine granules are thin for silt, powder
One or more of sand and flyash.Due to being laid with the particulate bed of material 6 of inviscid fine granules composition on connecting plate 3,
Even if the sealing at each connecting portion is destroyed, leak paths that inviscid fine granules can deposit between seam, reduction can
The leakage passage that can occur, improves antiseepage reliability；It is set to the anti-filter bed of material 8 and composite earthwork of 4 lower part of connecting plate 3 and toe board
Inviscid fine granules of the film 5 between each connecting portion have the function of filter protection, further improve the seepage prevention of dam founda structure
Reliability and safety.
For the method for deep covering layer top panel Rockfill Dam based moisture barrier structure for constructing above-mentioned, include the following steps：
A, the compound dam foundation of construction first carries out 12 treatment of dam foundation coating, main 12 surface layer of removing dam foundation coating
Sundries, mud etc., later in the dam foundation coating 12 of dam site upstream along river to being spaced apart at least two rows of stake holes of setting,
The stake holes being mainly distributed per campshed hole by least two along dam axially spaced-apart forms, and fill out in each stake holes setting rubble formed it is broken
Stone mar 2；
B, blotter 10 is laid on 12 surface of dam foundation coating where the top of broken stone pile 2, among blotter 10
TGXG 11 is equipped with, is laid with composite geo-membrane 5 and the anti-filter bed of material 8 successively on blotter 10 later；
C, the filling construction of toe board 4 and dam body 15 is carried out, after dam body 15 is filled at 1/3~1/2 design height of dam, compound
Concrete cut 1 is set in the dam foundation coating 12 of dam foundation upstream；Design height of dam refers to the design height of dam body 15；
D, after the completion of dam body 15 fills, panel 13 and toe board 4 are set；Along last row's broken stone pile 2 along river to arrangement
In the downstream of toe board 4, and with toe board x-ray 9 at a distance of 30~50m；Before water storage is closed on, concrete cut 1 is located at rubble pad
The part of more than 10 layer is cut, and carries out cast-in-place concrete to cutting part, while is poured connecting plate 3 on the anti-filter bed of material 8 and incited somebody to action
Concrete cut 1 is connect with toe board 4, and at the connecting portion between concrete cut 1 and connecting plate 3 and connecting plate 3
Water sealing structure is set respectively at connecting portion between toe board 4；
E, in the surface of dam foundation coating 12 of 1 upstream of concrete cut, the top surface of concrete cut 1, connecting plate 3
Upper surface, toe board 4 upper surface and toe board 4 be connected with panel 13 on the upper surface at position be laid with successively from the bottom up it is multiple
Close geomembrane 5, the particulate bed of material 6 and clay layer 7.
Embodiment
The design height of dam of certain concrete face rockfill dam dam body 15 is 200m, and upstream and downstream slope ratio is 1:1.4, dam crest is wide
14m, dam site riverbed are deep covering layer, and coating depth capacity 50m, material composition is extremely complex, mainly by coarse-grained soil and carefully
The alternate composition of grain soil.
The construction method of the seepage prevention of dam founda structure for above-mentioned concrete face rockfill dam of constructing, includes the following steps：
A, the compound dam foundation of construction first carries out 12 treatment of dam foundation coating, main 12 surface layer of removing dam foundation coating
Sundries, mud etc., later in the dam foundation coating 12 of dam site upstream along river to being spaced apart at least two rows of stake holes of setting,
The stake holes being mainly distributed per campshed hole by least two along dam axially spaced-apart forms, and fill out in each stake holes setting rubble formed it is broken
Stone mar 2；The depth capacity of stake holes is 30m；
B, the blotter 10 of 60cm thickness, rubble pad are laid on 12 surface of dam foundation coating where 2 top of broken stone pile
It is thick that layer 10 includes the rubble of 25cm thickness being laid with successively from the bottom up, the medium coarse sand of 5cm thickness, the TGXG 11 of 5cm thickness, 5cm
Medium coarse sand and 25cm thickness rubble；Blotter 10 is laid with after completion, is first laid on blotter 10 thick in 5cm thickness
Sand, then it is laid on blotter 10 the anti-filter bed of material 8 of composite geo-membrane 5 and 1m thickness successively；
C, the filling construction of toe board 4 and dam body 15 is carried out, dam body 15 fills 80m high, using mechanical hole on compound dam
Concrete cut 1 is set in the dam foundation coating 12 of base upstream, and the thickness of concrete cut 1 is 1.2m, concrete anti-seepage
The lower end of wall 1 is inserted into basement rock；
D, after the completion of dam body 15 fills, panel 13 and toe board 4 are set；Along last row's broken stone pile 2 along river to arrangement
In the downstream of toe board 4, and with toe board x-ray 9 at a distance of 50m；Broken stone pile 2 between concrete cut 1 and toe board x-ray 9 is equal
Even distribution, stake spacing × row's spacing are 1.5 × 1.5m；Row's spacing between each row's broken stone pile 2 in 9 downstream of toe board x-ray with
And stake spacing is from upstream to downstream and is sequentially increased, stake spacing of last row's broken stone pile 2 for 2.0m, last row's broken stone pile 2 with
Row's spacing between the adjacent row's broken stone pile 2 in its upstream side is 2.0m；Before water storage is closed on, concrete cut 1 is located at
The part of more than 10 blotter is cut, and carries out cast-in-place concrete to cutting part, while is poured successively on the anti-filter bed of material 8
Two block length 4.0m, thickness 0.9m connecting plate 3 concrete cut 1 is connect with toe board 4, and in concrete cut 1 with connecting
At connecting sewing 14 at connecting portion between plate 3, between two pieces of connecting plates 3 and the connecting portion between connecting plate 3 and toe board 4
Water sealing structure is set respectively at position；
E, in the surface of dam foundation coating 12 of 1 upstream of concrete cut, the top surface of concrete cut 1, connecting plate 3
Upper surface, toe board 4 upper surface and toe board 4 be connected with panel 13 on the upper surface at position be laid with successively from the bottom up it is multiple
Geomembrane 5, the particulate bed of material 6 and clay layer 7 are closed, the particulate bed of material 6 uses inviscid fine granules, and the thickness of the particulate bed of material 6 is 1.0m.
Claims (9)
1. deep covering layer top panel Rockfill Dam based moisture barrier structure, the dam foundation coating including being set to dam body (15) upstream
(12) concrete cut (1) in, is arranged on the compound dam foundation the compound dam foundation for being arranged on concrete cut (1) downstream
And it the toe board (4) that is connected with concrete cut (1) and is arranged on dam body (15) upstream face and is connected with toe board (4)
The panel (13) connect；It is characterized in that：The compound dam foundation include it is at least two rows of along river to the broken stone pile for being spaced apart setting
(2), the broken stone pile (2) that often row's broken stone pile (2) is mainly distributed by least two along dam axially spaced-apart forms；The broken stone pile (2)
Including the stake holes being arranged in the dam foundation coating (12) in concrete cut (1) downstream and the rubble being filled in stake holes.
2. deep covering layer top panel Rockfill Dam based moisture barrier structure as described in claim 1, it is characterised in that：The coagulation
The thickness of native cut-pff wall (1) is 0.8~1.4m.
3. deep covering layer top panel Rockfill Dam based moisture barrier structure as described in claim 1, it is characterised in that：It is described compound
The dam foundation further includes blotter (10), and the blotter (10) is layed in the dam foundation coating where at the top of broken stone pile (2)
(12) on surface, TGXG (11) is provided in blotter (10).
4. deep covering layer top panel Rockfill Dam based moisture barrier structure as claimed in claim 3, it is characterised in that：The toe board
(4) it is connected by connecting plate (3) with concrete cut (1), the company between the concrete cut (1) and connecting plate (3)
Water sealing structure is both provided at connecting portion at socket part position and between connecting plate (3) and toe board (4).
5. deep covering layer top panel Rockfill Dam based moisture barrier structure as claimed in claim 4, it is characterised in that：The connection
The quantity of plate (3) is 2~3 pieces, each connecting plate (3) along river to being sequentially connected together, connecting plate (3) and connecting plate (3) it
Between connecting sewing (14) at be provided with water sealing structure；The length of connecting plate (3) be 2~5m, the thickness and toe board of connecting plate (3)
(4) thickness of horizontal segment is equal.
6. deep covering layer top panel Rockfill Dam based moisture barrier structure as claimed in claim 5, it is characterised in that：It is described compound
The dam foundation further includes the anti-filter bed of material (8) being layed on blotter (10), between the anti-filter bed of material (8) and blotter (10)
Composite geo-membrane (5) is provided with, the connecting plate (3) and toe board (4) are arranged on the anti-filter bed of material (8)；The concrete anti-seepage
The surface of dam foundation coating (12) of wall (1) upstream, the top surface of concrete cut (1), the upper surface of connecting plate (3), toe board
(4) upper surface and toe board (4), which is connected with panel (13) on the upper surface at position, is provided with the particulate bed of material (6), described thin
Pellet layer (6) is laid with by inviscid fine granules, and composite geo-membrane (5), fine granules are provided on the bottom surface of the particulate bed of material (6)
Clay layer (7) is equipped on the top surface of layer (6).
7. deep covering layer top panel Rockfill Dam based moisture barrier structure as claimed in claim 6, it is characterised in that：The nothing is glued
Property fine granules one or more of for silt, Extra-fine sand and flyash.
8. the deep covering layer top panel Rockfill Dam based moisture barrier structure as described in claim 1,2,3,4,5,6 or 7, feature
It is：Along along last row's broken stone pile (2) from river to arrangement positioned at the downstream of toe board (4), and with toe board x-ray (9) at a distance of 30~
50m；Broken stone pile (2) between concrete cut (1) and toe board x-ray (9) is uniformly distributed, positioned at toe board x-ray (9) downstream
Each row's broken stone pile (2) between row's spacing and stake spacing be from upstream to downstream and be sequentially increased, row's spacing is adjacent two
The distance between broken stone pile (2) is arranged, the stake spacing is the distance between adjacent two broken stone piles (2) in often row's broken stone pile (2).
9. deep covering layer top panel Rockfill Dam based moisture barrier structure as claimed in claim 8, it is characterised in that：The stake holes
For cylindrical hole, a diameter of 1~2m；The stake spacing is 1~3m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721647875.6U CN207537975U (en) | 2017-11-30 | 2017-11-30 | Deep covering layer top panel Rockfill Dam based moisture barrier structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721647875.6U CN207537975U (en) | 2017-11-30 | 2017-11-30 | Deep covering layer top panel Rockfill Dam based moisture barrier structure |
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| Publication Number | Publication Date |
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| CN207537975U true CN207537975U (en) | 2018-06-26 |
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ID=62616291
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| CN201721647875.6U Active CN207537975U (en) | 2017-11-30 | 2017-11-30 | Deep covering layer top panel Rockfill Dam based moisture barrier structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107881987A (en) * | 2017-11-30 | 2018-04-06 | 中国电建集团成都勘测设计研究院有限公司 | Deep covering layer top panel Rockfill Dam based moisture barrier structure |
| CN109764823A (en) * | 2019-03-13 | 2019-05-17 | 中国电建集团成都勘测设计研究院有限公司 | DEFORMATION MONITORING SYSTEM and method for concrete face rockfill dam |
| CN110804994A (en) * | 2019-11-23 | 2020-02-18 | 深圳市东深工程有限公司 | Reservoir dam construction method |
-
2017
- 2017-11-30 CN CN201721647875.6U patent/CN207537975U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107881987A (en) * | 2017-11-30 | 2018-04-06 | 中国电建集团成都勘测设计研究院有限公司 | Deep covering layer top panel Rockfill Dam based moisture barrier structure |
| CN109764823A (en) * | 2019-03-13 | 2019-05-17 | 中国电建集团成都勘测设计研究院有限公司 | DEFORMATION MONITORING SYSTEM and method for concrete face rockfill dam |
| CN110804994A (en) * | 2019-11-23 | 2020-02-18 | 深圳市东深工程有限公司 | Reservoir dam construction method |
| CN110804994B (en) * | 2019-11-23 | 2022-02-22 | 深圳市东深工程有限公司 | Reservoir dam construction method |
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