A kind of full library basin Anti-seeping technology structure of karst areaTechnical field
The utility model relates to a kind of full library basin Anti-seeping technology structures of karst area, belong to hydraulic and hydroelectric engineering technologyThe complicated geologicals area reservoir leakage such as field more particularly to karst processing technology field.
Background technique
With the development of water resources and hydropower construction cause, the dam that the country is built is more and more, the good dam site of geological conditionsAlso fewer and fewer.Currently, many dams are built in the area of karsts developing area, build a dam herein, based process, reservoir periphery and libraryThe Anti-seeping technology of area's leakage passage is particularly important, while the construction technology handled is also more complicated.
Due to karst area, formation lithology is complicated, and under corrosion, karst area is frequently accompanied by depression, solution cavity, darkRiver, sinkhole, the water spot that disappears, karst, coal hole and other Geological Defects and possible leakage passage, build karst areaWhen reservoir, since Reservoir region leaks, reservoir can not normal water storage, be not only unable to complete former design objective, and dam body has leakageAquaporin equally jeopardizes the safety of dam body.And solution cavity, the underground river etc. of karst area are difficult to find out, and all find out workloadGreatly, investment is big, and therefore, Karst Reservoir Area leakage problems become the principal element for restricting entire engineering.
There are solution cavity, underground river, karst and other Geological Defects for being difficult to find out and cost is high for karst areaWith possible leakage passage, the seepage control method mainly used in engineering at present mainly has: soft felt bedding antiseepage, concrete pavingLid antiseepage, the antiseepage of cement bonded sand cemented rock ditch seam, solution cavity will be carried out cement grout and cement sand washing filling, concrete cutoff wall,Concrete cutoff wall etc. Anti-seeping technology mode.These processing modes mostly be for it can be found that specific breakthrough takenSeepage control measure based on " stifled " is stored as disclosed in the Chinese patent application No. is CN201320712498.5 for karst areaA kind of karst area pressurized tunnel disclosed in the leakage preventing structure of drainage facility, the Chinese patent application No. is CN201320324147.7Bottom carries and is used for red mud dump in karst terrain disclosed in leakage preventing structure, the Chinese patent application No. is CN200610200048.2Horizontal leakage preventing structure, red mud dump in karst terrain disclosed in the Chinese patent application No. is CN200610200047.8 drainingA kind of karst area large size disclosed in method and its drainage arrangement and Chinese patent application No. is CN201520779752.2 is moltenThe composite anti-penetrating structure in hole.
Solution cavity, underground river of karst area etc. are difficult to find out, and all find out heavy workload, and investment is big, therefore use above-mentioned anti-Seep treatment measures inevitably occur antiseepage be not thorough, be not comprehensive, uneconomic problem, or even there is the leakage after reservoir filling.AndAnd soft felt bedding anti-seepage method in above-mentioned seepage control measure, reservoir area shoulder can only be handled, exist for steeper area and be applicable in limitationThe problem of property.To reaching the effect of the full library basin antiseepage in karst area, be just badly in need of one kind can in the gentle section antiseepage in reservoir area andIn the leakage preventing structure of reservoir area steep slope section antiseepage.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of full library basin Anti-seeping technology knot of karst areaStructure, the full library basin Anti-seeping technology structure of the karst area is according to the different and different leaky properties of reservoir area landform, using libraryThe full library basin that bottom impervious barrier bedding, library bank gunite concrete barrier sheet bedding, concrete block completely spreads anti-seepage method and carries out antiseepage.
The utility model is achieved by the following technical programs.
The full library basin Anti-seeping technology structure of a kind of karst area provided by the utility model；It is described anti-including impervious barrierInfiltration layer includes clay liner, antiseepage film, clay protective layer, metalling, the clay liner, antiseepage film, clay protective layer, rubbleSuccessively compacting is laid with layer from top to bottom；The two sides of the impervious barrier are successively arranged anti-skidding pier, concrete anti-seepage plate, concrete anchoringDitch, anti-skidding pier are closely connect with impervious barrier, and the position that bottom storehouse steepness is 20 °~30 °, concrete anti-seepage plate is arranged in impervious barrierThe position that library bank slope degree is 60 °~75 ° is set, and the local position that library bank slope degree is 60 °~75 ° is arranged in concrete anchoring grooveIt sets.
The concrete anti-seepage plate carries out antiseepage using gunite concrete, and the part of antiseepage adds reinforcing bar.
The concrete anchoring groove is made of anchor pole and extension steel mesh.
The thickness 50cm of the clay liner, clay protective layer, metalling with a thickness of 1m.
The steepness is the tilt angle of library basin bottom part side slope.
The local location of the concrete anchoring groove setting are as follows: the position that library bank slope degree is 70 °~90 °.
The utility model has the beneficial effects that:
1. taking full advantage of local material and excavated material as bottom storehouse region antiseepage film by selection subregion seepage control measureThe protective layer of bedding is a kind of simple and easy, effective construction method, and achieves the benefit of preferable economy；
2. anti-using bottom storehouse antiseepage film, library bank gunite concrete according to the different and different leaky properties of reservoir area landformThe joint anti-seepage method of plate bedding, concrete blocking antiseepage is seeped, control leakage, reaches the antiseepage of the full bedding in full library to the greatest extentEffect can be used for reference for similar engineering construction.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the utility model concrete anchoring groove drawing；
Fig. 3 is the utility model library basin karst cave treatment plan view；
Fig. 4 is the utility model library basin karst cave treatment sectional view；
In figure: 1- clay liner, 2- antiseepage film, 3- clay protective layer, 4- metalling, the anti-skidding pier of 5-, 6- concrete anti-seepagePlate, 7- concrete anchoring groove, 8-C15 concrete, 9- infiltration lane, the reservoir area 10- impervious body.
Specific embodiment
Be described further below the technical solution of the utility model, but claimed range be not limited to it is described.
As shown in figures 1-4, the full library basin Anti-seeping technology structure of a kind of karst area；Including impervious barrier, the impervious barrierIncluding clay liner 1, antiseepage film 2, clay protective layer 3, metalling 4, the clay liner 1, antiseepage film 2, clay protective layer 3,Successively compacting is laid with metalling 4 from top to bottom；The two sides of the impervious barrier are successively arranged anti-skidding pier 5, concrete anti-seepage plate 6, mixSolidifying soil anchoring groove 7, anti-skidding pier 5 are closely connect with impervious barrier, and the position that bottom storehouse steepness is 20 °~30 ° is arranged in impervious barrier, mixesSolidifying soil barrier sheet 6 is arranged in the position that library bank slope degree is 60 °~75 °, the setting of concrete anchoring groove 7 library bank slope degree be 60 °~75 ° of local location.
The concrete anti-seepage plate 6 carries out antiseepage using gunite concrete, and the part of antiseepage adds reinforcing bar, increases itStability avoids the halfway problem of antiseepage.
The concrete anchoring groove 7 is made of anchor pole and extension steel mesh, connect concrete anti-seepage plate 6 with reservoir stability tightlyIt is close, it avoids antiseepage from being not thorough, incomplete problem, prevents the case where leaking after water storage.
The thickness 50cm of the clay liner 1, clay protective layer 3, metalling 4 with a thickness of 1m, prevent library water through leakingChannel 9 and leak.
The steepness is the tilt angle of library basin bottom part side slope.
The local location that the concrete anchoring groove 7 is arranged are as follows: the position that library bank slope degree is 70 °~90 °, local setting,So that concrete anchoring groove 7 and concrete anti-seepage plate 6 cooperate, preferably achieve the effect that antiseepage.
Preferably, the thickness of clay liner 1 is about 0.5m, to prevent the destruction of antiseepage film 2, after being laid with 2 waterproof blanket of antiseepage film, pavingIf geotextiles, the clay protective layer 3 of 0.5m thickness and the rock ballast of 1.0m are laid in geotextiles as metalling, as protective layer,It is used as ballast, simultaneously to prevent water flow scour riverbed.
Further, the reservoir area geological section provided first according to geological mapping early period analyzes the reservoir area section gradient, andCarry out multidomain treat-ment；For reservoir surrounding bank slope area, that is, library bank, the usual gradient is steeper, using gunite concrete bedding, is formedConcrete anti-seepage plate 6 does Anti-seeping technology；More gentle 24 ° or so regions general for library basin bottom part region, that is, bottom storehouse, using anti-Seep 2 bedding antiseepage of film；In addition for having verified the leakage passages 9 such as existing sinkhole, the water spot that disappears in reservoir area, implementing beddingBefore, it offsets water spot, sinkhole, corroded breaking zone and carries out antiseepage blocking by the way of the blocking of C15 concrete eight；Bottom storehouse antiseepage film 2Bedding and 6 bedding of library bank gunite concrete barrier sheet connect into a complete reliable library basin, and library water is prevented to seep through leakage passage 9Leakage.
Embodiment
As described above, the construction method of the utility model, comprising the following steps:
1. clearing up reservoir level or less reservoir area coating, that is, bottom storehouse according to normal pool level；
2. infiltration lane 9 present in the coating of reservoir level or less reservoir area is verified in exploration, infiltration lane 9 is cleared up；It is specifically divided into following steps:
(2.1) by the way of concrete blocking, infiltration lane 9 is backfilled with C15 concrete eight, in infiltration lane 9Surface be arranged concrete cover；
(2.2) it is cleared up in the maximum sized double-wide of 9 plane of infiltration lane, cleaning is with a thickness of 25cm, cleaningIt is backfilled after complete with C15 concrete eight；
(2.3) pass through the backfill and cleaning of step (2.1)~(2.2), it is anti-that C15 concrete eight and infiltration lane 9 form reservoir areaSeep body 10.
3. clearing up library bank, Slope leveling is come over and pledged allegiance to, irregular groove and fluid bowl is avoided the occurrence of, to the recessed of appearanceSlot and fluid bowl are backfilled using C15 concrete eight, in order to avoid occur aerial phenomenon inside concrete anti-seepage plate 6；
4. step 2.~3. handled after, carry out bottom storehouse impervious barrier bedding；
5. setting gradually anti-skidding pier 5, concrete anti-seepage plate 6, concrete anchoring groove 7 in the two sides of impervious barrier, construction is completed,It is finally reached the full library basin horizontal leakage preventing of bottom storehouse impervious barrier bedding, 6 bedding of library bank gunite concrete barrier sheet and concrete blocking.
The anti-skidding pier 5 is closely connect with impervious barrier, and the position that bottom storehouse steepness is 20 °~30 ° is arranged in impervious barrier, is mixedSolidifying soil barrier sheet 6 is arranged in the position that library bank slope degree is 60 °~75 °, the setting of concrete anchoring groove 7 library bank slope degree be 60 °~75 ° of local location is completely embedded concrete anti-seepage plate 6 with reservoir stability；
The concrete anti-seepage plate 6 carries out antiseepage using gunite concrete, and the part of antiseepage adds reinforcing bar；
The concrete anchoring groove 7 is made of anchor pole and extension steel mesh；
The infiltration lane 9 includes disappear water spot, sinkhole, solution cavity, corroded breaking zone；
The impervious barrier includes clay liner 1, antiseepage film 2, clay protective layer 3, metalling 4；The clay liner 1 is preventedSeeping film 2, clay protective layer 3, metalling 4, successively compacting is laid with from top to bottom.