CN104099903B - High-base asphalt concrete core dam - Google Patents

High-base asphalt concrete core dam Download PDF

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Publication number
CN104099903B
CN104099903B CN201410326190.6A CN201410326190A CN104099903B CN 104099903 B CN104099903 B CN 104099903B CN 201410326190 A CN201410326190 A CN 201410326190A CN 104099903 B CN104099903 B CN 104099903B
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core
district
dam
base
transition
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CN104099903A (en
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蔡新合
魏坚政
王君利
郝丽莎
雷艳
贾巍
吴峻峰
李锋
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Powerchina Northwest Engineering Corp Ltd
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Abstract

The present invention relates to high-base asphalt concrete core dam, it is characterized in that: it is made up of pedestal, transition 1st district, transition 2nd district, enrockment 1st district, enrockment 2nd district, low compression material district, riverbed and the bulwark of high-base, core-wall, asphalt concrete seepage prevention wall, core-wall is arranged on the pedestal of asphalt concrete seepage prevention wall, the pedestal of asphalt concrete seepage prevention wall is arranged on high-base, core-wall top, dam crest place is provided with bulwark; Two transition 1st districts are separately positioned on upstream side and the downstream of core-wall and are close to core-wall; Be provided with transition 2nd district in two transition, 1 outside, district; Transition 1st district, transition 2nd district equate with core-wall height; Described high-base height is more than 10m. Give full play to advantage separately and the comprehensive advantage of bituminous concrete, high-base, low compression material and stockpile, solve technically that bottom is narrow, the feasibility problem of the high asphaltic concrete core wall rock-fill dams of top broad valley, and can obviously strengthen dam body seepage reliability of structure, durability, shock resistance and security.

Description

High-base asphalt concrete core dam
Technical field
The present invention relates to a kind of high-base asphalt concrete core dam, belong to water power hydraulic engineering hydraulic structure technology neckTerritory.
Background technology
Along with water power implementation, in the abundant southwest of hydraulic power potentials, the Northwest, large quantities of high dams are built, buildingOr yet to be built. Earth and rockfill dam is modal a kind of dam type during current dam work is built, and is also a kind of dam type with fastest developing speed, accounts for builtThe more than 95% of dam sum. The earth and rockfill dam that whole world height of dam exceedes 15m has more than 29000, and wherein China has more than 15000,Mainly comprise homogeneous earth dam, core wall dam and CFRD etc.
Soil property antiseepage rock-fill dams are in the development of China early than concrete face rockfill dam, and Quantity is also compared with concrete face rockfill damMany. The most heights of dam of soil property antiseepage rock-fill dams of building before the seventies in last century are not more than 80m. Until 70 years last centuryGeneration end Gansu Bi Kou at the beginning of the eighties, two, stone river, Shaanxi earth and rockfill dam in succession build up and put into operation, and soil property antiseepage rock-fill dams height of dam is existedDomestic breakthrough 100m(green mouthful of height of dam 101.8m, stone river height of dam 104m). Build up the soil property that the height of dam putting into operation is greater than 100m thereafterAntiseepage rock-fill dams have: Yunnan Lubuge Weathered Material core wall dam, height of dam 103.8m; Heihe River Shaanxi Province Jinpen reservoir, height of dam 130m; The Yellow RiverXiao Langdi sloping core earth and rockfill dam, height of dam 167m; Mianyang, Sichuan buffalo man power station core wall rockfill dam, height of dam 108m; Sichuan lionPower station, level ground gravelly soil core wall rockfill dam, height of dam 136m; Its extra large core wall rockfill dam of the proper cloth in Xinjiang, height of dam 125m. Domestic buildingSoil property antiseepage rock-fill dams height of dam has reached 200m~250m level, Pubugou Hydropower Station core wall rockfill dam height of dam 186m, and glutinous bundle crosses water powerThe core wall rockfill dam of standing height of dam 261.5m. The height of dam that designs at present (can, can grind in advance) is greater than the core wall rockfill dam engineering of 200mMainly contain two Jiangkous (height of dam 332m, can grind), two river mouths (height of dam 270m, can grind), (height of dam 263m, this scheme is only complete on Miao Jia damBecome can grind in advance, now adopt weir development plan, concrete face rockfill dam height of dam 110m), the work such as dam, long river (height of dam 238m, can grind)Journey.
Asphaltic concrete core wall rock-fill dams are along with the development of construction equipment and checkout equipment in recent years, the carrying of asphalt qualityHeight, the further investigation of hydraulic asphalt concrete technology, asphalt concrete seepage prevention technology has a great development, but all cannot reachThe high asphaltic concrete core wall rock-fill dams of 200m level. The safety issue of the high asphaltic concrete core wall rock-fill dams of dam work bound pair, mainExist and following worry: (1) can not correct Prediction high asphaltic concrete core wall rock-fill dams dam settlement and the core-wall that causes of sedimentationThe concrete cut of distortion, stress, pitch core-wall and bottom or the draw bail form of pedestal and the requirement to core-wall material.(2) whether existing laboratory facilities adopt material for scale model, can ooze by the high asphaltic concrete core wall rock-fill dams of correct Prediction damThe physico-mechanical properties of stability problem and dam material thoroughly. (3) due to the existence of above-mentioned uncertain factor, whether can proposeAsphalt concrete material and the version of high resistance to extruding, high cracking resistance.
If the distortion of the high asphaltic concrete core wall rock-fill dams of 200m level of planning to build, amount of deflection and the magnitude of stress of core-wall reachThe degree of 150m level asphaltic concrete core wall rock-fill dams, can also accept for Ba Gongjie, has also just solved the high pitch of 200m level mixedThe technical bottleneck of solidifying native core wall rockfill dam.
Summary of the invention
The object of the invention is to propose a kind of high-base asphalt concrete core dam (hereinafter to be referred as high-base core wall dam), gramTake the technical barrier of the high asphaltic concrete core wall rock-fill dams of 200m level, give full play to bituminous concrete, high-base, low compression materialWith advantage separately and the comprehensive advantage of stockpile, solve technically that bottom is narrow, the high bituminous concrete heart of top broad valleyThe feasibility problem of wall rock-fill dams, and can obviously strengthen dam body seepage reliability of structure, durability, shock resistance and safetyProperty.
Technical scheme of the present invention is: high-base asphalt concrete core dam, is characterized in that: it is by high-base, pitchThe pedestal of concrete cut, core-wall, transition 1st district, transition 2nd district, enrockment 1st district, enrockment 2nd district, low compression material district, riverbed and anti-Wave wall composition, core-wall is arranged on the pedestal of asphalt concrete seepage prevention wall, and the pedestal of asphalt concrete seepage prevention wall is arranged on the high endOn seat, core-wall top, dam crest place is provided with bulwark; Two transition 1st districts are separately positioned on upstream side and the downstream of core-wallAnd be close to core-wall; Be provided with transition 2nd district in two transition, 1 outside, district; Transition 1st district, transition 2nd district equate with core-wall height;Described high-base height is more than 10m.
Described core-wall is asphaltic concrete core wall; Described high-base is C9015、C9020 or C18015 conventional coagulationCob wall.
The ratio of the height of dam H of described high-base height h and high-base core wall dam is 0.1~0.4.
Described upstream side and downstream are inclined-plane form.
The cross section of described high-base is up-narrow and down-wide trapezoidal, upper wide be 6~10 meters, the gradient is 1:0.1~1:0.5。
Under the upstream side of described high-base and the dam foundation in downstream, be provided with low compression material district, riverbed, described riverChuan Di compression material district is filled with low compression material.
Upstream side transition 2 outsides, district of described core-wall are also provided with enrockment 1st district, downstream transition 2 outsides, district of core-wallBe disposed with enrockment 2nd district, enrockment 1st district.
The dam slope of described upstream side is 1:m, m=1.8~2.5; The dam slope slope in downstream is than being 1:n, n=1.6~2.5;
Described enrockment 1st district, core-wall downstream and the subregion gradient in enrockment 2nd district are 1:k, k=0.5~1.5.
The high-base core wall dam that the present invention proposes, its advantage is: adopt asphaltic concrete core wall, asphalt concrete seepage prevention wallPedestal, high-base, low compression material and enrockment be combined into a kind of novel water retaining structure. Asphaltic concrete core wall, pitch mixPedestal, high-base and the grout curtain of solidifying native cut-pff wall is antiseepage body (grout curtain of high-base bottom). The present invention proposesHigh-base core wall dam, can make stress, sedimentation and the core-wall of the high pitch core wall rockfill dam of 200m level and the johning knot of baseThe distortion of structure etc. safety indexes, meets existing " Bituminous concrete facing of earth-rock dam and core-wall design specification " (DL/T5411-2009, SL501-2010) requirement, make the high pitch core wall rockfill dam of 200m level feasible technically, and meet fillDivide the economy requirement that utilizes local material (stockpile), there are good society, economy and ecological benefits. The present invention adopts lowCompression material distortion is little, space is little, sedimentation is little, can reduce dam deformation, improves heart wall stress.
Below in conjunction with embodiment and embodiment accompanying drawing, the present invention will be further described.
Brief description of the drawings
Fig. 1 is the schematic cross-sectional view of high-base core wall dam of the present invention;
Fig. 2 be high-base core wall dam of the present invention along the axis of dam (core-wall center line) sectional schematic diagram.
In figure: 1, enrockment 1st district; 2, enrockment 2nd district; 3, core-wall; 4, transition 1st district; 5, transition 2nd district; 6, bulwark; 7, riverbed is lowCompression material district (not containing high-base); 8, high-base; 9, grout curtain, 10, consolidation grouting; 11, asphalt concrete seepage prevention wallPedestal; 12, normal pool level; 13, level of dead water; 14, the dam foundation; 15, the axis of dam; 16, bulwark crest level; 17, crest elevation;18, seepage proof curtain bottom range; 19, irrigation gallery; 20, original place upper thread; 21, upstream side; 22, downstream; 23, dam abutment; 24, damBase; H is the height of dam of high-base core wall dam, and h is the height of high-base, and m is high-base core wall dam upstream dam slope slope ratio, and n is the high endSeat dam slope slope, core wall dam downstream ratio, k is enrockment 1st district, core-wall downstream and slope, the line of demarcation ratio in enrockment 2nd district, t is that high-base foundation ditch is openedDig slope ratio.
Detailed description of the invention
Embodiment 1
High-base asphalt concrete core dam is by high-base 8, core-wall 3, the pedestal 11 of asphalt concrete seepage prevention wall, transition1 district 4, transition 2 districts 5, enrockment 1 district 1, enrockment 2 districts 2, low compression material district 7, riverbed and bulwark 6 form, and core-wall 3 is arranged on dropOn the pedestal 11 of blue or green concrete cut, the pedestal 11 of asphalt concrete seepage prevention wall is arranged on high-base 8, core-wall 3 tops,Dam crest place is provided with bulwark 6; Two transition 1 districts 4 be separately positioned on the upstream side 21 of core-wall 3 and downstream 22 and with core-wall 3Be close to; Be provided with transition 2 districts 5 in 4 outsides, two transition, 1st district; Transition 1 district 4, transition 2 districts 5 highly equate with core-wall 3; DescribedHigh-base 8 height more than 10m.
Embodiment 2
As depicted in figs. 1 and 2, high-base asphalt concrete core dam is by high-base 8, core-wall 3, asphalt concrete seepage prevention6 groups of the pedestal 11 of wall, transition 1 district 4, transition 2 districts 5, enrockment 1 district 1, enrockment 2 districts 2, low compression material district 7, riverbed and bulwarksBecome, core-wall 3 is arranged on the pedestal 11 of asphalt concrete seepage prevention wall, and the pedestal 11 of asphalt concrete seepage prevention wall is arranged on high-baseOn 8, core-wall 3 tops, dam crest place is provided with bulwark 6; Two transition 1 districts 4 be separately positioned on core-wall 3 upstream side 21 and underTrip side 22 is also close to core-wall 3; Be provided with transition 2 districts 5 in 4 outsides, two transition, 1st district; Transition 1 district 4, transition 2 district 5 and the heartsWall 3 is highly equal, and transition region is subject to the protection of dam shell; Described high-base 8 height are more than 10m. Described core-wall 3 for pitch mixedSolidifying native core-wall; Described high-base 8 is C9015、C9020 or C18015 conventional concrete walls. Described high-base 8 height h are with highThe ratio of the height of dam H of base core wall dam is 0.1~0.4, the smaller the better, and determines according to engineering is actual. High-base core wall damHeight of dam H comprises: the height between pedestal 11, core-wall 3 and core-wall 3 and the dam crest of high-base 8, asphalt concrete seepage prevention wall. DescribedUpstream side 21 and downstream 22 be inclined-plane form; The dam slope of described upstream side is 1:m, m=1.8~2.5; DownstreamDam slope slope ratio is 1:n, n=1.6~2.5, and determine according to engineering is actual; The cross section of described high-base 8 is up-narrow and down-wideTrapezoidal, upper wide be 6~10 meters, the gradient is 1:0.1~1:0.5. The described upstream side of high-base 8 and the dam foundation in downstream 14 timesBe provided with low compression material district, riverbed 7, low compression material district, described riverbed 7 is filled with low compression material; Described core-wall 35 outsides, upstream side transition 2nd district be also provided with enrockment 1 district 1,5 outsides, downstream transition 2nd district of core-wall 3 are disposed with enrockment 2District 2, enrockment 1 district 1; Described core-wall downstream enrockment 1 district 1 is 1:k with the subregion gradient in enrockment 2 districts 2, k=0.5~1.5, andDetermine according to engineering is actual, it is best generally selecting k=1.0.
The elevation that the upstream and downstream foundation ditch of high-base 8 adopts low compression material district, riverbed 7 to be backfilled to before dam foundation excavation. High-base8 bottom basement rock adopts consolidation grouting 10 and grout curtain 9 to process.
High-base 8 excavation of foundation pit slopes are than being 1:t, and t determines according to dam foundation basic condition.
Above-mentioned parameter must meet existing " Bituminous concrete facing of earth-rock dam and core-wall design specification " (DL/T5411-2009, SL501-2010) requirement.
The high-base core wall dam that the present invention proposes, adopts asphaltic concrete core wall 3, pedestal 11, concrete high-base 8 and curtainCurtain grouting 9 is as leakage preventing structure. Concrete high-base 8 is according to design of gravity dam, and design standard is observed " concrete gravity dam designSpecification " relevant regulations of (L5108-1999, SL319-2005). The interior irrigation gallery 19 that arranges of concrete high-base 8, fills out at dam bodyBuild in process and implement grout curtain 9, improved work efficiency, reduced construction and disturbed, saved the duration. The height of concrete high-base 8Degree, according to reducing the stress of asphaltic concrete core wall 3, the magnitude that is deformed into 150m level asphalt concrete core dam is determined;The existence of concrete high-base 8, can effectively reduce stress and the distortion of asphaltic concrete core wall 3. Asphaltic concrete core wall 3 and dropThe structure of the pedestal 11 of blue or green concrete cut and water sealing structure thereof and material are wanted according to 150m level asphalt concrete core damAsk and select.
The high-base core wall dam that the present invention proposes, all can in transition 1 district 4 and (or) transition 2 districts 5, enrockment 1 district 1, enrockment 2 districts 2Employing rockfill materials fills, and comprises built-up area excavated material, stock ground piece building stones and stock ground sand gravel material etc. The selection of stockpileMust meet the related request of " rolling earth-rock dam design specification " (DL/T5395-2007, SL274-2001). Above-mentioned material district is passableMake full use of the excavated material of building, reduce the area of rejected material and slag field, reduce the impact of dam construction on environment, reduce engineeringCost, the economic indicator of raising dam body and hinge, has good economy, society and environmental ecological benefit.
The high-base core wall dam that the present invention proposes, at deep trouth position, bottom, river valley, adopts reliable normal concrete to buildForm high pedestal 8, to reduce the height of asphaltic concrete core wall 3, and reduce the stress deformation value of asphaltic concrete core wall 3. HighThe excavation pit that pedestal 8 constructions need adopts riverbed low compression material district 7 backfills. Low compression material district 7 can adopt a kind of lowCompression material, such as the Transition Materials in conventional design or its modified materials, dry lean concrete material, roller-compacting concrete material, modification sandGravel materials etc., above-mentioned material all belongs to industry known technology, is not just described in detail here. Riverbed low compression material district 7(is notContaining high-base), select as far as possible the material that in above-mentioned material, construction is simple, cost is low. In addition, the low compression material in riverbed district 7(is notContaining high-base) can help high pedestal 8 to meet the requirement of related specifications and stress stable to it. The low compression of high pedestal 8 and riverbedMaterial sections 7(is containing high-base) employing, can reduce distortion, the stress of dam body and core-wall, reach 150m level bituminous concreteThe standard of core wall dam, makes 200m level asphalt concrete core dam technical feasibility, economic security, makes 200m level bituminous concreteCore-wall can be accepted by people. And prior art is to adopt enrockment filling, there is space large, the shortcoming such as distortion is large, and sedimentation is large.
Dam structure in Fig. 1,2, must check dam body settlement, distortion, stress and core-wall amount of deflection and stress, displacementDeng, the regulation of satisfied " Bituminous concrete facing of earth-rock dam and core-wall design specification " (DL/T5411-2009, SL501-2010);Must check the stress of high pedestal and stablize, meeting " concrete gravity dam design specification " (L5108-1999, SL319-2005)Relevant regulations; Must check the dam body Ge Liao district osmotic stability of (comprising low compression solid area).
High pedestal concrete in Fig. 1,2, adopts normal concrete to build. Riverbed low compression material district 7(is not containing the high endSeat) employing compaction type construction method. Various stockpiles adopt the construction method construction of rock-fill dams stockpile.
Construction procedure: construction lofting, determine the position of the axis of dam 15. Dam abutment 23 and the dam foundation 24 excavate, the basis of high pedestalExcavation. Divide two parts to build high pedestal 8, first build high pedestal 8 one decks, construction consolidation grouting 10, then continues to build its remaining partThe high pedestal 8 dividing. The low compression material that fills the low compression material district 7 of high pedestal 8 both sides reaches original place upper thread 20,, executes meanwhileThe pedestal 11 of work asphalt concrete seepage prevention wall, construction enrockment 1 district 1, enrockment 2 districts 2, same with the pedestal 11 of asphalt concrete seepage prevention wallHigh. Construction in layer core-wall 3, transition 1 district 4, transition 2 districts 5, the elevation in Dai Zhesange district is higher than one of enrockment 1 district 1, enrockment 2 districts 2When individual construction layer height, construction enrockment 1 district 1, enrockment 2 districts 2, with core-wall 3, transition 1 district 4, the transition 2 same height in districts 5. Repeat above-mentioned executingWork order, until core-wall 3, transition 1 district 4, transition 2 districts 5, enrockment 1 district 1, enrockment 2 districts 2 are constructed to design altitude. In core-wall 3, mistakeCross in 1 district 4, transition 2 districts 5, enrockment 1 district 1, enrockment 2 district's 2 work progress, construction grout curtain 9 is to seepage proof curtain bottom range18. Construction wave wall 6 reaches bulwark crest level 16 and dam crest reaches crest elevation 17. After above-mentioned construction completes, reservoirRetaining arrives level of dead water 13, continues retaining to normal pool level 12.
Table 1 is the Contrast on effect table of the present invention and prior art:
As seen from the table, the high-base core wall dam that the present invention proposes, can make 200m level high pitch core wall rockfill damThe distortion of the syndeton of stress, sedimentation and core-wall and base etc. safety indexes, strengthens the reliable of dam body seepage structureProperty, durability, shock resistance and security.
The parts that the present embodiment does not describe in detail and structure &processes all belong to well-known components and the common structure of the industryAnd conventional means, here not narration one by one.

Claims (4)

1. high-base asphalt concrete core dam, is characterized in that: it is by high-base (8), core-wall (3), asphalt concrete seepage preventionThe pedestal (11) of wall, transition 1st district (4), transition 2nd district (5), enrockment 1st district (1), enrockment 2nd district (2), low compression material district, riverbed (7)And bulwark (6) composition, core-wall (3) is arranged on the pedestal (11) of asphalt concrete seepage prevention wall, asphalt concrete seepage prevention wallIt is upper that pedestal (11) is arranged on high-base (8), core-wall (3) top, and dam crest place is provided with bulwark (6); Two transition 1st districts (4)Be separately positioned on the upstream side (21) of core-wall (3) and downstream (22) and be close to core-wall (3); In outside, two transition 1st districts (4)Be provided with transition 2nd district (5); Transition 1st district (4), transition 2nd district (5) highly equate with core-wall (3); Described high-base (8) highlyMore than 10m; Described high-base (8) is C9015、C9020 or C18015 conventional concrete walls; Described high-base (8) highlyThe ratio of the height of dam H of h and high-base asphalt concrete core dam is 0.1~0.4; The cross section of described high-base (8) is upperNarrow lower wide trapezoidal, upper wide be 6~10 meters, the gradient is 1:0.1~1:0.5; Upstream side and the downstream of described high-base (8)And between the dam foundation (14), be provided with low compression material district, riverbed (7), low compression material district, described riverbed (7) is filled with low pressureCompression material.
2. high-base asphalt concrete core dam according to claim 1, is characterized in that: the upstream of described core-wall (3)Outside, side transition 2nd district (5) is also provided with enrockment 1st district (1), and the outside, downstream transition 2nd district (5) of core-wall (3) is disposed with heapStone 2nd district (2), enrockment 1st district (1).
3. high-base asphalt concrete core dam according to claim 1, is characterized in that: the dam slope slope ratio of upstream side is 1:M, m=1.8~2.5; The dam slope slope in downstream is than being 1:n, n=1.6~2.5.
4. high-base asphalt concrete core dam according to claim 2, is characterized in that: described core-wall downstream enrockment1st district (1) is 1:k with the subregion gradient in enrockment 2nd district (2), k=0.5~1.5.
CN201410326190.6A 2014-07-10 2014-07-10 High-base asphalt concrete core dam Active CN104099903B (en)

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CN105239535B (en) * 2015-10-09 2018-03-23 中国电建集团成都勘测设计研究院有限公司 Pitch core-wall pedestal and its construction method
CN107338770B (en) * 2017-08-17 2020-05-01 重庆交通大学 Combined dam shape of asphalt concrete core wall dam and concrete gravity dam and construction method thereof

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SU1546542A1 (en) * 1988-01-06 1990-02-28 Всесоюзный научно-исследовательский институт гидротехники им.Б.Е.Веденеева Earth dam
CN202482830U (en) * 2011-12-02 2012-10-10 中国水电顾问集团贵阳勘测设计研究院 A high roller compacted concrete anti-seepage dam with the height of over 200 m
CN102995608B (en) * 2012-12-14 2015-09-30 中国电建集团成都勘测设计研究院有限公司 A kind of Soil-core-wall rock-fill dam and construction method thereof
CN203546678U (en) * 2013-10-14 2014-04-16 中国水电顾问集团贵阳勘测设计研究院 Asphalt concrete core-wall rockfill dam structure
CN103741694B (en) * 2013-12-25 2016-03-30 长江勘测规划设计研究有限责任公司 The method of controlled grouting process vertical-type asphaltic concrete core wall earth and rockfill dam seepage

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