CN106522170A - Novel dam type adopting concrete anti-seepage wall as dam body anti-seepage body - Google Patents
Novel dam type adopting concrete anti-seepage wall as dam body anti-seepage body Download PDFInfo
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- CN106522170A CN106522170A CN201510575708.4A CN201510575708A CN106522170A CN 106522170 A CN106522170 A CN 106522170A CN 201510575708 A CN201510575708 A CN 201510575708A CN 106522170 A CN106522170 A CN 106522170A
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Abstract
The invention discloses a novel dam type adopting a concrete anti-seepage wall as a dam body anti-seepage body. The lower portion of the concrete anti-seepage core wall is connected with a dam foundation anti-seepage curtain, and an integral dam body anti-seepage system is formed. The structural size of the concrete anti-seepage core wall is t<1>, and the structural size of transition layers on the upstream side and the downstream side of the core wall is t<2>; when the dam height is smaller than 60 m to 70 m, t<2> is larger than or equal to (5-10)t<1>; and when the dam height is larger than 70 m (namely, a high dam), t<2> should be larger than 10 times of t<1>. According to the specific implementation of the novel dam type, dam materials of all zones are firstly subjected to construction filling, and the anti-seepage wall is made finally. Generally, the dam body filling capacity can be completed within a drought period, and the construction period of an earth and rockfill dam is greatly shortened; compared with same-dam-height earth and rockfill dams, investment can be effectively saved and is estimated to be less than 70%-90% of that of previous dams; and a traditional method of digging soil to be used as anti-seepage materials is abandoned, the concrete anti-seepage wall is used for replacement, and environment protection is greatly facilitated.
Description
Technical field
The present invention relates to building field, and in particular to a kind of employing concrete cut is used as dam body seepage body
New dam type.
Background technology
Pubugou Hydropower Station dam, built up in 2009, was subjected to the test of how subnormal retaining, monitoring
Achievement shows seepage control system normal operation.The operation of building up of the dam is shown, is being made using wide grading gravelly soil
In terms of for dam body seepage material, achieved with unprecedented achievement, become a mileage of similar engineering construction
Upright stone tablet.The expansion of impervious material means the progress of construction technology and method, and both is supporting, Xiang Fuxiang
Into.But from from the point of view of innovation, the Impervious Materials used by Pubugou Hydropower Station dam are still traditional material
Material, and the mechanical rolling and placement of layering is remained in the mode of building a dam, its construction period is longer, to quality
Control is more strict.From unlike Pubugou Project, smelting is strangled dam and adopts suitable asphalt concrete material conduct
Seepage prevention of core wall material, also needs placement layer by layer to roll, and the same duration is longer and quality control is strict, current hinge work
Journey more than 10 years of safe operation, and pass through final acceptance of construction.In addition, also substantial amounts of geotechnological non-woven fabrics conduct
The earth and rockfill dam (such as Jingyan County of Sichuan Province giant Buddha reservoir etc.) of impervious material, this dam type is to seepage by geo-textile cloth
Overlap joint and technique for sticking requirement are higher, and construction period will prevent from piercing through geotextiles, careful loaded down with trivial details construction technology
The longer construction period is always indispensable.
Although having reached international advanced or neck by the earth and rockfill dam dam construction technique for indicating of Pubugou Project power plant dam
First level, but which is traditional still fairly obvious, mainly has the disadvantages that：
First, from terms of materials, still using impermeable soil and its modified materials or other materials of anti-seepage effect can be reached
Material is used as Impervious Materials (calculous soil, geotextiles, bituminous concrete, concrete slab etc.).
2nd, construction method is still placement in layers and rolls (bituminous concrete is no exception), to densification simultaneously
Reduce later stage deformation.
3rd, dam embankment is essentially all by relevant partitions materials such as stockpile, Impervious Materials, anti-filter Transition Materials
The dam body for synchronously filling and gradually forming, the relevance between material are stronger.
4th, there is a safe flood in the construction time in above-mentioned earth and rockfill dam, typically be declared with bank diversion tunnel
Flood discharge water, is aided with the fixed mode of upstream and downstream cofferdam water retaining.
5th, increase problem, traditional pattern often time-consuming cost of building a dam for some old dams in area, or even obtain
Mistake is not repaid.
The content of the invention
For solving the above problems, the invention provides a kind of employing concrete cut is used as dam body seepage body
New dam type, in advance construction fill each subregion dam material, finally do cut-pff wall.Typically can be complete with regard to energy a withered phase
Measure into dam embankment side, greatly shorten the construction period of earth and rockfill dam；Compared with equal height of dam earth and rockfill dam, can be with
Effectively save investment, within investment estimation is the 70-90% on conventional dam；Digging field soil has been abandoned as antiseepage
The traditional method of material, and replaced by concrete cut, this is highly beneficial to environmental protection.
For achieving the above object, the technical scheme taken of the present invention is：
A kind of new dam type of employing concrete cut as dam body seepage body, concrete cutoff core is in bottom
It is connected with Curtain, forms the dam body seepage system of one globality；The knot of concrete cutoff core
Structure size t1, physical dimension t of the transition zone of core-wall upstream and downstream both sides2, when height of dam is less than 60-70 rice,
t2Preferably >=(5-10) t1, and when working as height of dam more than 70 meters (i.e. high dam), t2Should be greater than 10 times of t1。
A kind of construction method of the above-mentioned employing concrete cut as the new dam type of dam body seepage body, including such as
Lower step：
S1, carry out dam foundation it is necessary basis cleaning；
S2, carry out by design working drawing dam zoning fill until meet concrete core-wall construction needed for work
Industry platform, now dam embankment be close to dam body cope level；
S3, concrete cutoff core construction is carried out, be reserved as t2Center line (axis of dam) grooving of width
Construction (this is as good as with conventional concrete continuous wall construction)；
When S4, grooving are to dam foundation position, senior executive or pipe laying construction are carried out, that is, is carried out or pre-buried seepage prevention of dam founda
Curtain is constructed；
S5, layering, subregion carry out construction of concrete cut off wall up to design altitude；
S6, ending complete the dam embankment construction at remaining dam crest position.
The invention has the advantages that：
Has significance to the progress of earth and rockfill dam design and construction, its effect is also fairly obvious.Simplify first
Operational procedure, fills each subregion material of rock-fill dams by construction drawing in advance, without worrying conventional impervious core；
Next accelerates construction speed, and this is derived by the simplification of operational procedure, single with regard to enrockment subregion material
Speech, just can complete the side's of filling amount a withered phase, can shorten dramatically the construction period of earth and rockfill dam；3rd
Save economical cost, technical solution of the present invention can with the investment of effectively save in the past equal height of dam earth and rockfill dam,
Investment estimation is the 80-90% (square field dam, Matoushan Nature Reserve etc.) on conventional dam；4th reduces environmentally friendly impact
With destruction, conventional dam to Impervious Materials require it is higher, must dig field soil to take the preferable impermeable soil of quality, this
Bright technical scheme can be not required to do so, and this is highly beneficial to environmental protection；5th promotes industry technology enters
Step, current concrete cutoff core rock-fill dams there is no standard follow in technology with analysis, to this dam type
Popularization will promote industry scientific and technological progress with application, it is proposed that on the basis of application, reinforcement technology is ground with theory
Study carefully, by design, construction, calculate analysis, materials application research etc., form technological package Regulations.
Description of the drawings
Fig. 1 is a kind of employing concrete cut of the embodiment of the present invention as the new dam type of dam body seepage body
Structural representation.
Specific embodiment
In order that objects and advantages of the present invention become more apparent, with reference to embodiments the present invention is carried out
Further describe.It should be appreciated that specific embodiment described herein is only to explain the present invention,
It is not intended to limit the present invention.
Embodiment
It is applied to the design of Sichuan Province Tongjiang County square field dam reservoir and Goats in Liangshan Prefecture Matoushan Nature Reserve reservoir, its primary structure
Design is as shown in Figure 1.The operational procedure of concrete cutoff core rock-fill dams is：
1) carry out the necessary basis cleaning of dam foundation
2) carry out dam zoning by design working drawing to fill until meeting the operation needed for concrete core-wall construction
Platform (now dam embankment has been close to dam body cope level)；
3) concrete cutoff core construction is carried out, t is being reserved as2Center line (axis of dam) grooving of width
Construction (this is as good as with conventional concrete continuous wall construction)；
4), when grooving is to dam foundation position, senior executive or pipe laying construction is carried out, that is, is carried out or pre-buried seepage prevention of dam founda curtain
Curtain construction；
5) layering, subregion carry out construction of concrete cut off wall up to design altitude；
6) ending completes the dam embankment construction at remaining dam crest position.
Specific device parameter is as already identified above.I.e.：
1) when height of dam is less than 60-70 rice, t2Preferably >=(5-10) t1,
2) when height of dam is more than 70 meters (i.e. high dam), t2Should be greater than 10 times of t1
Such parameter setting it is critical that, because only that so can just make rigid body (concrete anti-seepage
Core-wall) maintain to coordinate with stress and the deformation of the flexible body (the thinner enrockment transition zone of particle) of upstream and downstream side,
Ensure that rigid concrete cut-pff wall is not to be caused by the excessive deformation and tension of upstream and downstream side transition zone
Drawing crack is destroyed, so that concrete cut loses the barrier performance as dam body key effect.
Must assure that rigid concrete cut-pff wall is not by the excessive deformation of upstream and downstream both sides transition zone and drawing
Stress and cause drawing crack to destroy so that concrete cut loses the key performance as dam body seepage.One
As should meet following relation：
1) when height of dam is less than 70 meters (middle weir), t2Preferably >=(5-10) t1,
2) when height of dam is more than 70 meters (i.e. high dam), t2Should be greater than 10 times of t1
3) physical dimension between the transition of stress layer of upstream and downstream both sides and middle folded concrete cut is removed
Meet, should also make on dam filling construction of constructing upstream side transition zone to fill dry density bigger
In the similar index of downstream transition layer, specifically according to construction test and determination can be calculated.
Originally it is embodied as selecting as the new material different from other impervious body materials first with concrete,
The selection range of earth and rockfill dam Impervious Materials is enriched, occupancy and the environmental protection pressure of land resource is reduced.Secondly it is mixed
Solidifying soil leakage proof wall construction is to adopt Wu Kasi Drillings, kerf, hydraulic groover, jetting in Earth-rockfill Dam
And the engineering method such as thin grab bucket, slotted hole is built in dam body or ground, with slurry strengthened wall, then using going straight up to
Conduit, the casting concrete into slotted eye form continuous concrete walls, to reach antiseepage purpose.Cut-pff wall
Construction is adapted to the dam body and various complex foundations of various different materials, and the two ends of wall can be with bank slope antiseepage
Facility or bank basement rock are connected, and the bottom of wall can be embedded in certain depth in weak weathered rockses, thoroughly block
The infiltration current of dam body and the dam foundation.The routine that conventional earth and rockfill dam impervious body construction in layer is filled is overcome thus
Engineering method, shortened dramatically on the engineering time.3rd has changed each subregion of dam body section in the past in construction method
Rising is filled in the synchronization of material, can fill the correlations such as upstream and downstream stockpile, anti-filter Transition Materials in advance by expected design
Subregion material, finally the Construction Anti-seepage body of wall near the dam crest, so effectively reduces dam embankment construction
Interference, will also save the construction period.There is a safe flood in the construction time in the 4th conventional earth and rockfill dam,
Typically drained off floodwater with bank diversion tunnel, be aided with the fixed mode of upstream and downstream cofferdam water retaining.The present invention can take
The construction in the upstream and downstream that disappears cofferdam, and dash is realized according to dam body itself, that is, facilitate work arrangement and save again
Fund.Reinforcing of 5th present invention especially to some diseases danger earth and rockfill dams (core-wall failure leaks etc.), ooze
Drain process is largely effective.
The above is only the preferred embodiment of the present invention, it is noted that common for the art
For technical staff, under the premise without departing from the principles of the invention, some improvements and modifications can also be made,
These improvements and modifications also should be regarded as protection scope of the present invention.
Claims (2)
1. a kind of new dam type of employing concrete cut as dam body seepage body, it is characterised in that coagulation
Native impervious core is connected with Curtain in bottom, forms the dam body seepage system of one globality；It is mixed
Physical dimension t of solidifying soil impervious core1, physical dimension t of the transition zone of core-wall upstream and downstream both sides2, work as height of dam
During less than 60-70 rice, t2Preferably >=(5-10) t1, and when height of dam is more than 70 meters, t2Should be greater than 10 times of t1。
2. new dam type of a kind of employing concrete cut as claimed in claim 1 as dam body seepage body
Construction method, it is characterised in that comprise the steps：
S1, carry out dam foundation it is necessary basis cleaning；
S2, carry out by design working drawing dam zoning fill until meet concrete core-wall construction needed for work
Industry platform, now dam embankment be close to dam body cope level；
S3, concrete cutoff core construction is carried out, be reserved as t2Center line (axis of dam) grooving of width
Construction；
When S4, grooving are to dam foundation position, senior executive or pipe laying construction are carried out, that is, is carried out or pre-buried seepage prevention of dam founda
Curtain is constructed；
S5, layering, subregion carry out construction of concrete cut off wall up to design altitude；
S6, ending complete the dam embankment construction at remaining dam crest position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510575708.4A CN106522170A (en) | 2015-09-11 | 2015-09-11 | Novel dam type adopting concrete anti-seepage wall as dam body anti-seepage body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510575708.4A CN106522170A (en) | 2015-09-11 | 2015-09-11 | Novel dam type adopting concrete anti-seepage wall as dam body anti-seepage body |
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| CN106522170A true CN106522170A (en) | 2017-03-22 |
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| CN201510575708.4A Pending CN106522170A (en) | 2015-09-11 | 2015-09-11 | Novel dam type adopting concrete anti-seepage wall as dam body anti-seepage body |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593190A (en) * | 2019-08-20 | 2019-12-20 | 中国电建集团贵阳勘测设计研究院有限公司 | Water-jetting wall-building and seepage-proofing method thereof |
| CN111622180A (en) * | 2020-05-28 | 2020-09-04 | 中国电建集团中南勘测设计研究院有限公司 | Salt pan dam foundation seepage-proof hydraulic balance structure system and control method thereof |
| CN117216849A (en) * | 2023-09-13 | 2023-12-12 | 大连理工大学 | Design method of impervious wall structure for reducing tensile stress of impervious wall of soil core wall rock-fill dam on deep coverage layer |
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| JP2003020631A (en) * | 2001-07-06 | 2003-01-24 | Shimizu Corp | Impervious structure and construction method for fill dam |
| CN201284475Y (en) * | 2008-09-03 | 2009-08-05 | 安徽省水利水电勘测设计院 | Combined concrete cut-off wall |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003020631A (en) * | 2001-07-06 | 2003-01-24 | Shimizu Corp | Impervious structure and construction method for fill dam |
| CN201284475Y (en) * | 2008-09-03 | 2009-08-05 | 安徽省水利水电勘测设计院 | Combined concrete cut-off wall |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593190A (en) * | 2019-08-20 | 2019-12-20 | 中国电建集团贵阳勘测设计研究院有限公司 | Water-jetting wall-building and seepage-proofing method thereof |
| CN111622180A (en) * | 2020-05-28 | 2020-09-04 | 中国电建集团中南勘测设计研究院有限公司 | Salt pan dam foundation seepage-proof hydraulic balance structure system and control method thereof |
| CN117216849A (en) * | 2023-09-13 | 2023-12-12 | 大连理工大学 | Design method of impervious wall structure for reducing tensile stress of impervious wall of soil core wall rock-fill dam on deep coverage layer |
| CN117216849B (en) * | 2023-09-13 | 2024-06-11 | 大连理工大学 | Design method of impervious wall structure for reducing tensile stress of impervious wall of soil core wall rock-fill dam on deep coverage layer |
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Application publication date: 20170322 |