CN108457249A - A kind of structure design and construction method of novel composite panel sand-gravel dam - Google Patents
A kind of structure design and construction method of novel composite panel sand-gravel dam Download PDFInfo
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- CN108457249A CN108457249A CN201810083631.2A CN201810083631A CN108457249A CN 108457249 A CN108457249 A CN 108457249A CN 201810083631 A CN201810083631 A CN 201810083631A CN 108457249 A CN108457249 A CN 108457249A
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- 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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Abstract
A kind of structure design and construction method of novel composite panel sand-gravel dam, bed course include rich slurry cement sand and gravel bed course and cement sand and gravel bed course, and cement sand and gravel setting cushion is at the bed course of 1/2 height of dam sand gravel dam body below；At the bed course of sand gravel dam body of the richness slurry cement sand and gravel setting cushion more than 1/2 height of dam；It is perfused with bituminous concrete screed at gap between richness slurry cement sand and gravel bed course and bulwark bottom plate；Apart from bulwark bottom plateaThe dam body of rice is filled using cement sand and gravel；Dam body is divided into the main rockfill area in upstream and downstream rockfill area；It is equipped in rich slurry cement sand and gravel bed course and cement sand and gravel bed course and is parallel to panel layer and interconnected draining blind pipe.The configuration of the present invention is simple is effectively protected panel, reduces the deformation of panel and bulwark, enhances the impermeability of dam body.The stability of upstream and downstream dam slope is greatly improved.The advantages of effectively reducing dam embankment quantities, giving full play to bulwark.Convenient for construction.
Description
Technical field
The present invention relates to a kind of hydraulic engineering technical field, especially a kind of structure of novel composite panel sand-gravel dam is set
Meter and construction method.
Background technology
Sand gravel material is widely distributed in riverbed and bank slope beach, and exploitation construction cost is low, is the good day for constructing high dam
Right material.Sand gravel material has many advantages, such as that low compressibility, shearing strength and deformation modulus are high, the easy compacting of construction.But natural sand
Gravel material is poor due to the discrete type of grading, discontinuity and construction easy separation, impervious and erosion resistibility.On the western ground in China
Area, this material are even more to be seen everywhere.Wuluwati (131.8m) He Heiquan (123.5m) two that China has been built up now
Faced rockfill dam.It is analyzed from China's ditch rear panel sand-gravel dam dam break, most important reason is exactly panel and bulwark end
Water fails and bulwark generation moderate finite deformation, and there are highly permeable layers, seepage flow height to overflow at crest elevation, and sand gravel material permeates
It destroys, downstream dam slope local buckling, sliding, panel is hanging, fractures, and the unrestrained top of flood forms a kind of pattern of Progressive failure, causes
Huge people's property and economic loss.The floor elevation of the hereafter design of faced rockfill dam, bulwark is above
Normal pool level, even higher than design flood level, and drainage prism is set in dam.Purpose is that library water is avoided often to submerge wave resistance
Wall prevents from generating destroyed stop-water and leak since bulwark joint seal is bad or crest deformation amount is excessive.But wave resistance
The setting of wall can effectively save the amount of filling, and higher bulwark is arranged sometimes, can be more economical.It is anti-after dam failure after ditch
From the point of view of the design of unrestrained wall, bulwark does not play the role of water blocking in normal conditions.The setting of dam internal drainage rib body can be effective
The saturation in dam body is reduced, but considerably increases the difficulty of dam construction, reduces the efficiency of construction.
Cemented gravel dam is sent out on the basis of recent decades summarize traditional panel rock-fill dams with RCC dam advantage
A kind of new dam type that exhibition is got up, it is saved with cement materials, and construction diversion is convenient, and temperature control is simple, and speed of application is fast, is adapted to weak
The features such as ground and good shock resistance.Cemented gravel dam dam body build is between rock-fill dams and concrete gravity dam.Gelling
The intensity and deformation modulus of sand gravel are less than concrete, but are higher than sand gravel material, are between concrete and sand gravel material
Transition material.In general, the cement sand and gravel seepage-resistant grade for not mixing additive can reach S8, and seepage-resistant grade can after mixing additive
To reach S12.Since the research of the performance of cement sand and gravel at this stage is perfect not enough, my highest glue that the country puts into operation
Solidifying sand-gravel dam is to keep a mouthful fort reservoir dam, height of dam 64.6m.To ensure dam longtime running, need in dam body upstream upstream face
Select suitable seepage control measure to realize water retaining function, the antiseepage layer material of sand-gravel dam generally use conventional concrete, roll it is mixed
Solidifying soil.There are following worries for the safety of the high cemented gravel dam of dam work bound pair：(1) the durable Journal of Sex Research mesh of cement sand and gravel material
It is preceding only rest on infiltration corrosion, some impervious and freeze proof aspect affecting laws are inquired into, inadequate system is goed deep into, not energetic；(2)
Quantitative analysis of the cement sand and gravel material carefully under sight level is few, can not the Accurate Prediction dam type service life, do not have also in native land
Have more than hundred meters of high cemented gravel dams.
Under geological process, nearby panel inclined slope aspect tensile stress is maximum by 0.65H (H is height of dam), which damages first
Wound, simultaneously because damage and failure also occur at 0.85H in whip sheath effect, panel.Under the effect of a certain seepage gradient, piping occurs
Afterwards, if failure by piping can be expanded to, have much relations with seepage paths length, seepage paths is longer, and just more difficulty expands to destruction.And only
Have when seepage gradient rises to certain certain altitude, piping can just expand to upstream, make to be connected to above and below, form channel, that is, occur
Failure by piping.
Invention content
The object of the present invention is to provide a kind of simple in structure, bulwark effect can be given full play to, dam embankment amount is reduced, subtracts
Light shake rear panel extent of the destruction, improves the structure design and construction side of the novel composite panel sand-gravel dam of dam body anti-permeability strength
Method.
The present invention solves technical solution used by prior art problem：A kind of structure of novel composite panel sand-gravel dam
Design method includes the sand-gravel dam being made of main rockfill area and the downstream rockfill area at the downstream slope surface of main rockfill area
The upstream slope surface of body, sand gravel dam body is equipped with bed course and is parallel to the panel layer of bed course, and the top of sand gravel dam body, which is equipped with, prevents
Unrestrained wall；The bottom of panel layer is equipped with concrete toe board, and the lower section of concrete toe board is equipped with grout curtain, and the bed course includes rich starches
Cement sand and gravel bed course and cement sand and gravel bed course, cement sand and gravel setting cushion is in 1/2 height of dam sand gravel dam body below
At bed course；At the bed course of sand gravel dam body of the richness slurry cement sand and gravel setting cushion more than 1/2 height of dam；The rich slurry gelling sand
Bituminous concrete screed is perfused at gap between gravel blanket and bulwark bottom plate and between panel layer and bed course；Position
In the main rockfill area in a meters of altitude range below of dam body top be made of cement sand and gravel is filled dam body be gelled gravel
Stone area；The computational methods of a are：A=(b-l)/(m+n), wherein b=(HIt checks- h)/J, HIt checksFor height of the check flood level away from dam bottom
Degree, h are the floor elevation of bulwark, and J is the impervious allowable gradient of sand gravel, and m is the upstream gradient, and n is the subregion gradient, and l is dam crest
Width, b are the bottom lengths in dam body cement sand and gravel area；It is equipped in richness slurry cement sand and gravel bed course and cement sand and gravel bed course
It is parallel to panel layer and interconnected draining blind pipe, collector drain is equipped at the dam foundation of sand gravel dam body, the draining is blind
The bottom end of pipe is connected to collector drain.
The slope ratio of the downstream slope surface of the main rockfill area is 1:N, n are the subregion gradient, and the value of n passes through finite element stability Calculation
It determines.
0.5≤n≤0.7。
The main rockfill area height of ratio of the downstream rockfill area is a meters low.
The horizontal width of the bed course is 6 meters.
It is filled using riverbed sandy gravel the main rockfill area；It is filled using sand gravel and excavation rock ballast downstream rockfill area
It forms.
The cement sand and gravel bed course, rich slurry cement sand and gravel bed course, main rockfill area and downstream rockfill area are all made of three layers
Stone, every layer of layer thickness are 25cm.
A kind of construction method of novel composite panel sand-gravel dam, includes the following steps：
S1, parameter budget：According to design of face slab rockfill dam specification, the upstream gradient, the dam of composite panel sand-gravel dam are determined
The height H of top width degree, the anti-permeability strength of sand gravel dam body materials, check flood level away from dam bottomIt checks, upstream gradient m, the subregion gradient
N, the floor elevation h for determining the impervious allowable gradient J of sand gravel using finite element stable calculating method, determining bulwark；According to public affairs
Formula：A=(b-l)/(m+n), determines the value of a, wherein b=(HIt checks- h)/J, HIt checksFor height of the check flood level away from dam bottom, h is
The floor elevation of bulwark, J are the impervious allowable gradient of sand gravel, and m is the upstream gradient, and n is the subregion gradient, 0.5≤n≤0.7, l
For width at dam crest, b is the bottom lengths in dam body cement sand and gravel area；
S2, building stones are chosen：Gravel using diagrid by diameter in gravel material more than 150mm is rejected, the gravel that will be sieved
After inserting natural soft-clay material in building stones or excavating rock ballast material and cementitious material mix is added, dam in cubic metre of earth and stone Transport Machinery is used；
S3, it is laid with three layers of cement sand and gravel bed course on the bed course of the sand-gravel dam dam body below of 1/2 dam body, and makes every
The thickness of layer cement sand and gravel bed course is 25cm；It is blind as draining that water-permeable pipe is buried during being laid with cement sand and gravel bed course
Pipe；The spacing of the water-permeable pipe is 3m, and is rolled；The interlayer face of every layer of cement sand and gravel bed course is laid with one layer of 15mm cement
Mortar；In the region of cement sand and gravel bed course and main rockfill area transition, ensure that the thickness of bed course is not less than in roller compaction process
Design thickness.
S4, sand gravel dam body more than 1/2 height of dam bed course on be laid with three layers of rich slurry cement sand and gravel bed course, every layer of richness
The thickness for starching cement sand and gravel bed course is 25cm, and mortar is added in cement sand and gravel bed course, then carries out vibrating until bleeding.
And for embedded water-permeable pipe as draining blind pipe, the spacing of water-permeable pipe is 3m during being laid with rich slurry cement sand and gravel bed course；
S5, it when dam embankment to the floor elevation away from bulwark being a meters of dam body height, is filled using cement sand and gravel
Dam body；
S6, the construction that bulwark is carried out after dam body settlement is basicly stable, in richness slurry cement sand and gravel bed course and bulwark
Between gap and panel layer and bed course between gap at asphalting concrete mortar to form thickness as the pitch of 10mm
Concrete sand pulp layer.
S7, the construction for carrying out panel layer.
The beneficial effects of the present invention are：The grit masonry dam that the present invention designs is simple in structure, utilizes cement sand and gravel
It plays mould to be between concrete and sand gravel, panel can be effectively protected, reduce the deformation of panel and bulwark.Without as passing
Bed course area, transition region and drainage prism is equally arranged in the face dam of system.Partly made by the bed course (wide 6m) more than 1/2 height of dam
Cement sand and gravel is starched with richness, the dam material at this is can effectively prevent and seepage failure occurs.In view of existing concrete surface sheetpile
The sand-gravel dam dam break lesson of ditch rear panel has been used for reference in the absorption of masonry dam specification, it is specified that normal pool level will be less than bulwark bottom plate height
Journey mainly avoids library water from often submerging bulwark, prevents since bulwark joint seal is bad or crest deformation amount is excessive
And generate destroyed stop-water and leak, the present invention allow normal pool level to be located on bulwark elevation floor elevation, and main enrockment
The slope of the downstream slope surface in area is than breaking the slope ratio in face more than downstream rockfill area downstream, therefore can effectively reduce top dam body fills work
Cheng Liang reduces investment.Bulwark is to be located in the cement sand and gravel of a (m) thickness, and be filled with bituminous concrete therebetween
Mortar, bulwark will not rotate deformation, are also at most sedimentation and deformation, can effectively prevent seam at bulwark bottom plate from stopping
The destruction of water.The slope ratio of the downstream slope surface of main rockfill area is 1:N makes the cement sand and gravel of a (m) thickness be fully seated within main rockfill area
On, main rockfill area dam material is preferable, and the Deformation control to the cement sand and gravel of a (m) thickness is highly beneficial.Dam body is only divided to two
Area does not need cumbersome screening after dam material is exploited from stock ground, you can upper dam fills, and the requirement to the dam material filled is low, just
In construction.Since cement sand and gravel has certain cohesive strength compared to sand gravel, therefore the stability of upstream and downstream dam slope has obtained pole
Big raising, timely downstream dam slope slide, and sliding scale is also in the following dam slope of cement sand and gravel, to dam body monolithic stability
Property influence very little.Upstream bed course can play the role of flood season temporary water dash.Setting draining blind pipe, finally oozes in the bed course of upstream
Water all comes together in collector drain, other drainage channels and drainage prism need not be arranged in dam, when construction is greatly saved
Between, simplify construction technology.
Description of the drawings
Fig. 1 is the dam structure schematic diagram for the composite panel sand-gravel dam that the present invention designs.
Fig. 2 is the structural schematic diagram of dam crest of the present invention.
Fig. 3 is the structural schematic diagram at the dam foundation of the present invention.
In figure：1- bulwarks, 2- richnesses slurry cement sand and gravel bed course, 3- dam body cement sand and gravels area, 4- drainings blind pipe, 5- glue
Solidifying sand-gravel cushion, 6- panel layers, the main rockfill areas 7-, 8- concrete toe board, 9- bituminous concretes screed, 10- concrete mats
Layer, 11- collector drains, the downstreams 12- rockfill area.
Specific implementation mode
Below in conjunction with the drawings and the specific embodiments, the present invention will be described：
Fig. 1 is the dam structure schematic diagram for the composite panel sand-gravel dam that the present invention designs.A kind of novel composite panel sand
The construction design method on gravel dam includes the downstream rockfill area 12 of the downstream slope surface by main rockfill area 7 and positioned at main rockfill area 7
The sand gravel dam body of composition, wherein filled using riverbed sandy gravel main rockfill area 7；Downstream rockfill area 12 uses sand gravel
It is filled with rock ballast is excavated.Main 7 height of rockfill area of ratio of downstream rockfill area 12 is a meters low, in the upstream slope surface of sand gravel dam body
Equipped with bed course and it is parallel to the panel layer 6 of bed course, the top of sand gravel dam body is equipped with bulwark 1；The bottom of panel layer 6 is equipped with mixed
The lower section of solidifying soil toe board 8, concrete toe board 8 is equipped with grout curtain, and bed course includes rich slurry cement sand and gravel bed course 2 and gelling gravel
Stone bed course 5, cement sand and gravel bed course 5 are layed at the bed course of 1/2 height of dam sand gravel dam body below；Richness slurry cement sand and gravel pad
Layer 2 is layed at the bed course of sand gravel dam body of 1/2 height of dam or more；Between richness slurry cement sand and gravel bed course 2 and 1 bottom plate of bulwark
And it is perfused with pitch at the gap between panel layer 6 and bed course (richness slurry cement sand and gravel bed course 2 and cement sand and gravel bed course 5)
Concrete sand pulp layer 9；The horizontal width of richness slurry cement sand and gravel bed course 2 and cement sand and gravel bed course 5 is 6 meters.
As shown in Fig. 2, the main rockfill area 7 in a meters of altitude range below of dam body top is using cement sand and gravel
Dam body cement sand and gravel area 3 made of filling；As shown in Figure 3：In richness slurry cement sand and gravel bed course 2 and cement sand and gravel bed course 5
Interior be equipped with is parallel to panel layer 6 and interconnected draining blind pipe 4, and collector drain 11 is equipped at the dam foundation of sand gravel dam body,
The bottom end of draining blind pipe 4 is connected to collector drain 11, is preferably equipped with concrete cushion 10 in the bottom of collector drain 11.The meter of a
Calculation method is：A=(b-l)/(m+n), wherein b=(HIt checks-h)/J,HIt checksFor height of the check flood level away from dam bottom, h is wave resistance
The floor elevation of wall 1, J are the impervious allowable gradient of sand gravel, and m is the upstream gradient, and n is the subregion gradient, and l is width at dam crest.B is practical
Upper calculating be dam body cement sand and gravel area 3 bottom lengths (as shown in Figure 1).
The slope ratio of the downstream slope surface of main rockfill area 7 is 1:N, n are the subregion gradient, and n values are true by finite element stability Calculation
It is fixed.In general, 0.5≤n≤0.7.Cement sand and gravel bed course 5, rich slurry cement sand and gravel bed course 2, main rockfill area 7 and downstream heap
Stone area 12 is all made of three floor stone, and every layer of layer thickness is 25cm.
A kind of construction method of novel composite panel sand-gravel dam, includes the following steps：
S1, parameter budget：According to design of face slab rockfill dam specification, the upstream gradient, the dam of composite panel sand-gravel dam are determined
The height H of top width degree, the anti-permeability strength of sand gravel dam body materials, check flood level away from dam bottomIt checks, upstream gradient m, the subregion gradient
N, the floor elevation h for determining the impervious allowable gradient J of sand gravel using finite element stable calculating method, determining bulwark；According to public affairs
Formula：A=(b-l)/(m+n), determines the value of a, wherein b=(HIt checks- h)/J, HIt checksFor height of the check flood level away from dam bottom, h is
The floor elevation of bulwark, J are the impervious allowable gradient of sand gravel, and m is the upstream gradient, and n is the subregion gradient, 0.5≤n≤0.7, l
For width at dam crest.B is the bottom lengths in dam body cement sand and gravel area.
If more than the floor elevation of bulwark there is the 4m depth of waters, the maximum allowable hydraulic slope of dam body sand gravel is 0.1, dam
Top width 10m, upstream gradient m=1.4, subregion gradient n=0.6, it is contemplated that the bottom plate sealing of bulwark destroys, then water is in sand
Most short seepage paths is b=4/0.1=40m, a=(40-10)/(1.4+0.6)=15m in gravel dam body.Wherein subregion slope ratio n, root
It according to cemented gravel dam design criteria, needs to determine by finite element stability Calculation, to obtain top dam body cement sand and gravel
The optimal proportion in area.The slope of the downstream slope surface of main rockfill area is than 1:Ranging from the 1 of n:0.5-1:0.7.
S2, building stones are chosen：Gravel using diagrid by diameter in gravel material more than 150mm is rejected, the gravel that will be sieved
After inserting natural soft-clay material in building stones or excavating rock ballast material and cementitious material mix is added, dam in cubic metre of earth and stone Transport Machinery is used.
S3, it is laid with three layers of cement sand and gravel bed course on the bed course of the sand-gravel dam dam body below of 1/2 dam body, and makes every
The thickness of layer cement sand and gravel bed course is 25cm, and buries water-permeable pipe as draining during being laid with cement sand and gravel bed course
The spacing of blind pipe, water-permeable pipe is 3m.And it is rolled；The interlayer face of every layer of cement sand and gravel bed course is laid with one layer of 15mm cement bonded sand
Slurry.The region of cement sand and gravel bed course and main rockfill area transition ensures that the thickness of bed course is not less than design thickness in roller compaction process
.
S4, sand gravel dam body more than 1/2 height of dam bed course on be laid with three layers of rich slurry cement sand and gravel bed course, every layer of richness
The thickness for starching cement sand and gravel bed course is 25cm, and certain proportion is added in cement sand and gravel bed course and (is wanted according to specification and design
Ask determining) mortar, then carry out vibrating until bleeding.And it is embedded permeable during being laid with rich slurry cement sand and gravel bed course
For pipe as draining blind pipe, the spacing of water-permeable pipe is 3m.
S5, when dam body height of the dam embankment to a meters of the floor elevation away from bulwark, dam is filled using cement sand and gravel
Body.
S6, the construction that bulwark is carried out after dam body settlement is basicly stable, in richness slurry cement sand and gravel bed course and bulwark
Between gap between and the gap between panel layer and bed course at asphalting concrete mortar to form thickness as the drip of 10mm
Green concrete sand pulp layer.
S7, the slding form operation for carrying out panel layer.
Table (1) and the Contrast on effect table that table (2) is the present invention and the prior art：
The Contrast on effect table of table (1) the technology of the present invention and faced rockfill dam
The Contrast on effect table of table (2) the technology of the present invention and cemented gravel dam
| Hundred meter level height of dam feasibilities | Expense | Durability | |
| The technology of the present invention | It is feasible | It is few | It is high |
| Cemented gravel dam | It is infeasible | Under the conditions of identical height of dam, cement consumption is more, and cost is high | It is uncertain |
The above content is combine specific optimal technical scheme it is made for the present invention be further described, and it cannot be said that
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention's
Protection domain.
Claims (8)
1. a kind of construction design method of novel composite panel sand-gravel dam includes by main rockfill area and under main rockfill area
The sand gravel dam body of the downstream rockfill area composition at slope surface is swum, the upstream slope surface of sand gravel dam body is equipped with bed course and is parallel to pad
The top of the panel layer of layer, sand gravel dam body is equipped with bulwark；The bottom of panel layer is equipped with concrete toe board, concrete toe board
Lower section is equipped with grout curtain, which is characterized in that the bed course includes rich slurry cement sand and gravel bed course and cement sand and gravel bed course, glue
Solidifying sand-gravel cushion is layed at the bed course of 1/2 height of dam sand gravel dam body below；Richness slurry cement sand and gravel setting cushion is in 1/2
At the bed course of sand gravel dam body more than height of dam；The richness is starched between cement sand and gravel bed course and bulwark bottom plate and panel layer
Bituminous concrete screed is perfused at gap between bed course；Master in a meters of altitude range below of dam body top
Rockfill area is the dam body cement sand and gravel area made of cement sand and gravel is filled；The computational methods of a are：A=(b-l)/(m+
N), wherein b=(HIt checks- h)/J, HIt checksFor height of the check flood level away from dam bottom, h is the floor elevation of bulwark, and J is gravel
The impervious allowable gradient of stone, m are the upstream gradient, and n is the subregion gradient, and l is width at dam crest, and b is the bottom in dam body cement sand and gravel area
Length；It is equipped in rich slurry cement sand and gravel bed course and cement sand and gravel bed course and is parallel to panel layer and interconnected draining is blind
Pipe, is equipped with collector drain at the dam foundation of sand gravel dam body, and the bottom end of the draining blind pipe is connected to collector drain.
2. a kind of construction design method of novel composite panel sand-gravel dam according to claim 1, which is characterized in that institute
The slope ratio for stating the downstream slope surface of main rockfill area is 1:N, n are the subregion gradient, and the value of n is determined by finite element stability Calculation.
3. a kind of construction design method of novel composite panel sand-gravel dam according to claim 2, which is characterized in that
0.5≤n≤0.7。
4. a kind of construction design method of novel composite panel sand-gravel dam according to claim 1, which is characterized in that institute
The main rockfill area height of ratio for stating downstream rockfill area is a meters low.
5. a kind of construction design method of novel composite panel sand-gravel dam according to claim 1, which is characterized in that institute
The horizontal width for stating bed course is 6 meters.
6. a kind of construction design method of novel composite panel sand-gravel dam according to claim 1, which is characterized in that institute
Main rockfill area is stated to fill using riverbed sandy gravel；It is filled using sand gravel and excavation rock ballast downstream rockfill area.
7. a kind of construction design method of novel composite panel sand-gravel dam according to claim 1, which is characterized in that institute
It states cement sand and gravel bed course, rich slurry cement sand and gravel bed course, main rockfill area and downstream rockfill area and is all made of three layers of stone, every layer of paving
Material thickness is 25cm.
8. a kind of construction method of novel composite panel sand-gravel dam, which is characterized in that include the following steps：
S1, parameter budget：According to design of face slab rockfill dam specification, determine that the upstream gradient of composite panel sand-gravel dam, dam crest are wide
Degree, the height H of the anti-permeability strength of sand gravel dam body materials, check flood level away from dam bottomIt checks, upstream gradient m, subregion gradient n, profit
The floor elevation h for being determined the impervious allowable gradient J of sand gravel with finite element stable calculating method, being determined bulwark；According to formula：a
=(b-l)/(m+n), determines the value of a, wherein b=(HIt checks- h)/J, HIt checksFor height of the check flood level away from dam bottom, h is wave resistance
The floor elevation of wall, J are the impervious allowable gradient of sand gravel, and m is the upstream gradient, and n is the subregion gradient, and 0.5≤n≤0.7, l are dam
Top width degree, b are the bottom lengths in dam body cement sand and gravel area；
S2, building stones are chosen：Gravel using diagrid by diameter in gravel material more than 150mm is rejected, the gravel material that will be sieved
Middle filling natural soft-clay material excavates rock ballast material and after cementitious material mix is added, uses dam in cubic metre of earth and stone Transport Machinery；
S3, it is laid with three layers of cement sand and gravel bed course on the bed course of the sand-gravel dam dam body below of 1/2 dam body, and makes every layer of glue
The thickness of solidifying sand-gravel cushion is 25cm；Water-permeable pipe is buried during being laid with cement sand and gravel bed course as draining blind pipe；
The spacing of the water-permeable pipe is 3m, and is rolled；The interlayer face of every layer of cement sand and gravel bed course is laid with one layer of 15mm cement bonded sand
Slurry；In the region of cement sand and gravel bed course and main rockfill area transition, ensures that the thickness of bed course is not less than in roller compaction process and set
Count thickness.
S4, sand gravel dam body more than 1/2 height of dam bed course on be laid with three layers of rich slurry cement sand and gravel bed course, every layer of rich slurry glue
The thickness of solidifying sand-gravel cushion is 25cm, and mortar is added in cement sand and gravel bed course, then carries out vibrating until bleeding.And
Water-permeable pipe is buried during being laid with rich slurry cement sand and gravel bed course as draining blind pipe, the spacing of water-permeable pipe is 3m；
S5, when dam embankment to the floor elevation away from bulwark being a meters of dam body height, dam is filled using cement sand and gravel
Body；
S6, the construction that bulwark is carried out after dam body settlement is basicly stable, between richness slurry cement sand and gravel bed course and bulwark
Asphalting concrete mortar is to form thickness as the pitch coagulation of 10mm at gap between gap and panel layer and bed course
Soil sand pulp layer.
S7, the construction for carrying out panel layer.
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| CN201810083631.2A CN108457249B (en) | 2018-01-29 | 2018-01-29 | Structural design and construction method of composite panel gravel dam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810083631.2A CN108457249B (en) | 2018-01-29 | 2018-01-29 | Structural design and construction method of composite panel gravel dam |
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| CN108457249B CN108457249B (en) | 2020-02-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778787A (en) * | 2019-01-07 | 2019-05-21 | 中国水利水电科学研究院 | High CFRD impervious body design method on deep covering layer in restricted channel |
| CN110004884A (en) * | 2019-03-20 | 2019-07-12 | 四川能投建工集团水利水电工程有限公司 | The construction method of rock in a kind of hydraulic and hydroelectric engineering |
| CN110499743A (en) * | 2019-07-29 | 2019-11-26 | 中电建十一局工程有限公司 | A kind of overlay film cemented gravel dam and its method of construction |
| CN110541399A (en) * | 2019-09-29 | 2019-12-06 | 宁夏水利水电勘测设计研究院有限公司 | Dam body for reservoir dam adding |
| CN111058416A (en) * | 2018-10-16 | 2020-04-24 | 成秉功 | Reservoir repair system |
| CN114427214A (en) * | 2022-03-07 | 2022-05-03 | 中冶长天国际工程有限责任公司 | Dam foundation reservoir bottom seepage-proofing paving structure and building method thereof |
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| CN106087880A (en) * | 2016-07-19 | 2016-11-09 | 中国水利水电第十工程局有限公司 | Dam that a kind of 300 meter levels are high and construction technology thereof |
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| CN105926546A (en) * | 2016-06-21 | 2016-09-07 | 四川大学 | Rich mortar gelatinization sand gravel grouting and vibrating integrated device |
| CN106087880A (en) * | 2016-07-19 | 2016-11-09 | 中国水利水电第十工程局有限公司 | Dam that a kind of 300 meter levels are high and construction technology thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111058416A (en) * | 2018-10-16 | 2020-04-24 | 成秉功 | Reservoir repair system |
| CN109778787A (en) * | 2019-01-07 | 2019-05-21 | 中国水利水电科学研究院 | High CFRD impervious body design method on deep covering layer in restricted channel |
| CN109778787B (en) * | 2019-01-07 | 2020-11-20 | 中国水利水电科学研究院 | Design method for high-rise rockfill dam seepage-proof body on deep covering layer in narrow river channel |
| CN110004884A (en) * | 2019-03-20 | 2019-07-12 | 四川能投建工集团水利水电工程有限公司 | The construction method of rock in a kind of hydraulic and hydroelectric engineering |
| CN110499743A (en) * | 2019-07-29 | 2019-11-26 | 中电建十一局工程有限公司 | A kind of overlay film cemented gravel dam and its method of construction |
| CN110541399A (en) * | 2019-09-29 | 2019-12-06 | 宁夏水利水电勘测设计研究院有限公司 | Dam body for reservoir dam adding |
| CN114427214A (en) * | 2022-03-07 | 2022-05-03 | 中冶长天国际工程有限责任公司 | Dam foundation reservoir bottom seepage-proofing paving structure and building method thereof |
| CN114427214B (en) * | 2022-03-07 | 2023-12-29 | 中冶长天国际工程有限责任公司 | Dam foundation reservoir bottom seepage-proofing paving structure and construction method thereof |
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