CN104652371B - The glue of crossing set up based on old dam coagulates rock-fill dams and construction method thereof - Google Patents
The glue of crossing set up based on old dam coagulates rock-fill dams and construction method thereof Download PDFInfo
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- CN104652371B CN104652371B CN201510045483.1A CN201510045483A CN104652371B CN 104652371 B CN104652371 B CN 104652371B CN 201510045483 A CN201510045483 A CN 201510045483A CN 104652371 B CN104652371 B CN 104652371B
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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
The glue of crossing that the present invention relates to set up based on old dam coagulates rock-fill dams and construction method thereof, and this is crossed glue and coagulates rock-fill dams for being equipped with cemented gravel dam layer and rock-fill concrete integument the most successively on Jiu Ba surface.This construction method, including construction method and the construction method at top on surface, Jiu Ba upstream and downstream, the construction method on surface, Jiu Ba upstream and downstream includes: cleaning face, storehouse；Build upstream template and downstream template；Enrockment；Fill cement sand and gravel material；Pour automatic close concrete.The construction method in old dam crest portion includes: the dam crest on the high old dam of heap；Enrockment dam crest；Pour dam crest automatic close concrete；Remove upstream template and downstream template.Present invention achieves rock-fill concrete and the rapid construction on the basis of Jiu Ba of cement sand and gravel material, save upstream face and arrange the operation of face slab for water retaining, simplify construction, reduction of erection time.
Description
Technical field
The present invention relates to a kind of glue of crossing set up based on old dam and coagulate rock-fill dams and construction method thereof, belong to structure and the technical field of construction of gelling rock-fill dams.
Background technology
The main body of rock-fill dams is with gravel embankment, is equipped with the dam that impervious body builds up；It is the one of earth and rockfill dam.The advantage on this dam is to make full use of local natural material, adapts to different geological conditions, and construction method is easier, and anti-seismic performance is good；Its deficiency is typically to arrange construction diversion and flood releasing structure outside dam, and rock-fill dams are after using certain time limit, and dam body there will be the problems such as crack, seepage, erosion attack, has a strong impact on the intensity of dam, stable and durability.Rock-fill dams are widely used, and after problem, just remove, reconstruct, and cost is the highest, and construction period is long, administer to water conservancy and bring the biggest difficulty.
And small power station in rural water retaining structure mostly is homogeneous earth dam, running for many years, there are the problems such as crack, seepage, erosion attack in earth dam, has a strong impact on the intensity of dam, stable and durability, affects performance and the security of rural small hydropower project benefit.Therefore, homogeneous earth dam need to carry out dam body seepage, fluid erosion prevention processes and reinforcement transformation.
Small power station in rural water retaining structure mostly is homogeneous earth dam, runs for many years, and the problems such as crack, seepage, erosion attack occurs in earth dam, has a strong impact on the intensity of dam, stable and durability, affects performance and the security of rural small hydropower project benefit.Therefore, homogeneous earth dam need to be carried out dam body seepage and fluid erosion prevention processes so that raising standard and reinforcement are transformed.
Summary of the invention
In order to solve the problem of above-mentioned existence, the invention discloses the glue of crossing set up based on old dam and coagulate rock-fill dams and construction method thereof, its concrete technical scheme is as follows:
The glue of crossing set up based on old dam coagulates rock-fill dams, including old dam, it is characterized in that described Jiu Ba surface is equipped with cemented gravel dam layer and rock-fill concrete integument the most successively.
The antiseepage coefficient of described rock-fill concrete integument is 1.025
×10-8cm/s ~2.087 ×10-8cm/s。
The thickness of described cemented gravel dam layer is required to be more than 3 times of cement sand and gravel material maximum particle diameter.
The outer side slope of described cemented gravel dam layer can be 1:0.2 to 1:0 than for side slope outside 1:0.6 ~ 1:0.8, described rock-fill concrete integument.
The glue of crossing set up based on old dam coagulates the construction method of rock-fill dams, including construction method and the construction method at top on surface, Jiu Ba upstream and downstream, it is characterized in that the construction method on surface, described Jiu Ba upstream and downstream comprises the following steps:
(1) cleaning face, storehouse: Jiu Ba surface is cleared up；
(2) upstream template and downstream template are built: correspondence sets up upstream template and downstream template, described upstream template and downstream template all to tilt towards old dam outside the upstream side and downstream on old dam；
(3) enrockment: require width needed for cemented gravel dam layer is reserved on surface, Jiu Ba upstream and downstream according to design, is being carried out enrockment by excavator or crane with meeting the stockpile required near the position of upstream template and downstream template；
(4) cement sand and gravel material is filled: between stockpile and surface, Jiu Ba upstream and downstream, fill cement sand and gravel material, form the cemented gravel dam layer on surface, Jiu Ba upstream and downstream；
(5) automatic close concrete is poured: when the cemented gravel dam layer that step (4) is formed and old dam are contour, pouring of automatic close concrete is carried out between upstream template, downstream template and corresponding cemented gravel dam layer, automatic close concrete is filled in the gap between stockpile, form rock-fill concrete, constitute the rock-fill concrete integument on surface, Jiu Ba upstream and downstream；
The construction method in described old dam crest portion comprises the following steps:
The dam crest on the high old dam of (a) heap: the both sides stockpile enrockment of the dam crest on old dam, and pour with automatic close concrete, fill with cement sand and gravel material between the enrockment of the dam crest both sides on old dam；
B () enrockment dam crest: when step (a) reaches the height that design is corresponding, stops filling cement sand and gravel material, uses stockpile enrockment between upstream template and downstream template；
C () pours dam crest automatic close concrete: pour automatic close concrete on the enrockment of the dam crest of step (b) gained, and concrete enters in the gap of enrockment, forms rock-fill concrete, constitutes the rock-fill concrete integument of dam crest；
D () removes upstream template and downstream template.
In the construction method step (4) on surface, described Jiu Ba upstream and downstream, cement sand and gravel material constantly vibrates in casting process, and cement sand and gravel material part is clamp-oned in the gap of old dam surface gaps and stockpile.
The rock-fill concrete compression strength that described step (5) is formed reaches 2.5Mpa, just can carry out step (6).
Rock-fill concrete (RFC), the enrockment of particle diameter greatly will directly put in storage, then pours special automatic close concrete, fill stockpile space, form rock-fill concrete.Rock-fill concrete uses local enrockment as aggregate, reduces cement consumption, and cost-effective, speed of application is fast, can effectively reduce the heat of hydration of concrete, has technique simple, and construction link is few, can be as homogeneous earth dam dam body seepage material and fluid erosion prevention material.
Cement sand and gravel material (CSG) is will to add water and Binder Materials in the materials such as the channel sand gravel that can be easily obtained near dam site or excavation waste, then mix and stir with easy equipment, obtain a kind of dam material.This material is built a dam, and to have gel material content few, and cost is low, and heat of hydration temperature rise is low；Make full use of excavation waste, channel sand gravel, simplify preparation section, reduce cost, reduce the pollution to environment, can be as homogeneous earth dam dam body fluid erosion prevention material.Owing to dam body requires that only water and common cement sand and gravel material (CSG) anti-permeability performance are slightly worse, therefore with common cement sand and gravel material (CSG) as needing downstream face thereon to take extra seepage control measure during dam body materials.
The present invention, based on cement sand and gravel material (CSG) and two kinds of dam material pluses and minuses of rock-fill concrete (RFC), proposes cement sand and gravel mixing overflow dam and the construction method thereof set up on a kind of old dam.The method of the present invention, for using rock-fill concrete and cement sand and gravel to carry out combining building a dam with existing old dam, is filled carrying out cement sand and gravel material near old dam part, and outermost layer pours rock-fill concrete, the advantage that can simultaneously play bi-material.
Patent of the present invention has the advantage that
1. the present invention is to reinforce at Jiu Bashang, relatively rebuilds new dam and reduces quantities.
2. the present invention can carry out water level and crosses water regulation higher than the flood of dam crest.
Rock-fill concrete the most of the present invention and cement sand and gravel material all use local material to reduce cost, and can reduce the pollution to environment.
4. present invention achieves rock-fill concrete and the rapid construction on the basis of Jiu Ba of cement sand and gravel material, save upstream face and arrange the operation of face slab for water retaining, simplify construction, reduction of erection time.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention,
Fig. 2 is the enrockment of the present invention and fills the view of cement sand and gravel material,
Fig. 3 is the view after the present invention pours automatic close concrete,
Fig. 4 is the view that the present invention completes the construction of old dam crest portion,
Reference numerals list: 1 old dam, 2 cemented gravel dam layers, 3 rock-fill concrete integuments, 4 upstream templates, 5 downstream templates, 6 stockpiles, 7 cement sand and gravel material, 8 automatic close concretes.
Detailed description of the invention
Below in conjunction with the accompanying drawings and detailed description of the invention, it is further elucidated with the present invention.It should be understood that following detailed description of the invention is merely to illustrate the present invention rather than limits the scope of the present invention.It should be noted that these accompanying drawings are the schematic diagram of simplification, the basic structure of the present invention being described the most in a schematic way, therefore it only shows the composition relevant with the present invention.
Fig. 1 is the structural representation of the present invention, visible in conjunction with accompanying drawing, and this glue of crossing of foundation based on old dam 1 coagulates rock-fill dams, and including old dam 1, surface, described old dam 1 is equipped with cemented gravel dam layer 2 and rock-fill concrete integument 3 the most successively.The antiseepage coefficient of described rock-fill concrete integument 3 is 1.025 × 10-8cm/s
~2.087 ×10-8cm/s.The density of rock-fill concrete integument 3 is good, can stop that moisture soaks the inside of the present invention, protect the present invention, extend the life-span.
The thickness of described cemented gravel dam layer 2 is required to be more than 3 times of cement sand and gravel material 7 maximum particle diameter.Guaranteeing that cemented gravel dam layer 2 is internal not have and the gap of cemented gravel dam layer 2 thickness not matched size, the arbitrary cross section of cemented gravel dam layer 2 is the most closely knit.
The outer side slope of described cemented gravel dam layer 2 is than for 1:0.6 ~ 1:0.8, and the described outer side slope of rock-fill concrete integument 3 can be 1:0.2 to 1:0.
The glue of crossing set up based on old dam 1 coagulates the construction method of rock-fill dams, including construction method and the construction method at top on surface, upstream and downstream, old dam 1, it is characterized in that the construction method on surface, upstream and downstream, described old dam 1 comprises the following steps:
(1) cleaning face, storehouse: surface, old dam 1 is cleared up；
(2) upstream template 4 and downstream template 5 are built: correspondence sets up upstream template 4 and downstream template 5, described upstream template 4 and downstream template 5 all to tilt towards old dam 1 outside the upstream side and downstream on old dam 1；
(3) enrockment: require width needed for cemented gravel dam layer 2 is reserved on surface, upstream and downstream, old dam 1 according to design, is being carried out enrockment by excavator or crane with meeting the stockpile 6 required near the position of upstream template 4 and downstream template 5；
(4) cement sand and gravel material 7 is filled: between stockpile 6 and surface, upstream and downstream, old dam 1, fill cement sand and gravel material 7, form the cemented gravel dam layer 2 on surface, upstream and downstream, old dam 1；
(5) automatic close concrete 8 is poured: when cemented gravel dam layer 2 and the old dam 1 that step (4) is formed is contour, pouring of automatic close concrete 8 is carried out between upstream template 4, downstream template 5 and corresponding cemented gravel dam layer 2, automatic close concrete 8 is filled in the gap between stockpile 6, form rock-fill concrete, constitute the rock-fill concrete integument 3 on surface, upstream and downstream, old dam 1；
The construction method at top, described old dam 1 comprises the following steps:
The dam crest on the high old dam 1 of (a) heap: both sides stockpile 6 enrockment of the dam crest on old dam 1, and pour with automatic close concrete 8, fill with cement sand and gravel material 7 between the enrockment of the dam crest both sides on old dam 1；
B () enrockment dam crest: when step (a) reaches the height that design is corresponding, stops filling cement sand and gravel material 7, with stockpile 6 enrockment between upstream template 4 and downstream template 5；
C () pours dam crest automatic close concrete 8: pour automatic close concrete 8 on the enrockment of the dam crest of step (b) gained, and concrete enters in the gap of enrockment, forms rock-fill concrete, constitutes the rock-fill concrete integument 3 of dam crest；
D () removes upstream template 4 and downstream template 5.
In the construction method step (4) on surface, upstream and downstream, described old dam 1, cement sand and gravel material 7 constantly vibrates in casting process, and cement sand and gravel material 7 part is clamp-oned in the gap of old dam 1 surface gaps and stockpile 6.
The rock-fill concrete compression strength that described step (5) is formed reaches 2.5Mpa, just can carry out step (6).
The present invention, by filling automatic close concrete 8 in stockpile 6, plays the effect of antiseepage, simplify construction, be positioned at the cemented gravel dam layer 2 on surface, old dam 1, permeate poor, the intensity of 28 day age is about 4Mpa, for about 3 times of normal sands gravel material, in the present invention mainly as reinforcement material；The glue excessively of the present invention coagulates the height of rock-fill dams and determines rational height according to the geographical environment of construction.
Technological means disclosed in the present invention program is not limited only to the technological means disclosed in above-mentioned technological means, also includes the technical scheme being made up of above technical characteristic.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, relevant staff can carry out various change and amendment completely in the range of without departing from this invention technological thought.The content that the technical scope of this invention is not limited on specification, it is necessary to determine its technical scope according to right.
Claims (7)
1. the glue of crossing set up based on old dam coagulates the construction method of rock-fill dams, including construction method and the construction method at top on surface, Jiu Ba upstream and downstream, it is characterized in that the construction method on surface, described Jiu Ba upstream and downstream comprises the following steps:
(1) cleaning face, storehouse: Jiu Ba surface is cleared up；
(2) upstream template and downstream template are built: correspondence sets up upstream template and downstream template, described upstream template and downstream template all to tilt towards old dam outside the upstream side and downstream on old dam；
(3) enrockment: require width needed for cemented gravel dam layer is reserved on surface, Jiu Ba upstream and downstream according to design, is being carried out enrockment by excavator or crane with meeting the stockpile required near the position of upstream template and downstream template；
(4) cement sand and gravel material is filled: between stockpile and surface, Jiu Ba upstream and downstream, fill cement sand and gravel material, form the cemented gravel dam layer on surface, Jiu Ba upstream and downstream；
(5) automatic close concrete is poured: when the cemented gravel dam layer that step (4) is formed and old dam are contour, pouring of automatic close concrete is carried out between upstream template, downstream template and corresponding cemented gravel dam layer, automatic close concrete is filled in the gap between stockpile, form rock-fill concrete, constitute the rock-fill concrete integument on surface, Jiu Ba upstream and downstream；
The construction method in described old dam crest portion comprises the following steps:
The dam crest on the high old dam of (a) heap: the both sides stockpile enrockment of the dam crest on old dam, and pour with automatic close concrete, fill with cement sand and gravel material between the enrockment of the dam crest both sides on old dam；
B () enrockment dam crest: when step (a) reaches the height that design is corresponding, stops filling cement sand and gravel material, uses stockpile enrockment between upstream template and downstream template；
C () pours dam crest automatic close concrete: pour automatic close concrete on the enrockment of the dam crest of step (b) gained, and concrete enters in the gap of enrockment, forms rock-fill concrete, constitutes the rock-fill concrete integument of dam crest；
D () removes upstream template and downstream template.
The glue of crossing set up based on old dam the most according to claim 1 coagulates the construction method of rock-fill dams, it is characterized in that in the construction method step (4) on surface, described Jiu Ba upstream and downstream, cement sand and gravel material constantly vibrates in casting process, and cement sand and gravel material part is clamp-oned in the gap of old dam surface gaps and stockpile.
The glue of crossing set up based on old dam the most according to claim 2 coagulates the construction method of rock-fill dams, it is characterized in that the rock-fill concrete compression strength that described step (5) is formed reaches 2.5Mpa, just can carry out the construction in old dam crest portion.
The glue of crossing of foundation based on old dam that construction method the most according to claim 3 prepares coagulates rock-fill dams, including old dam, it is characterized in that described Jiu Ba surface is equipped with cemented gravel dam layer and rock-fill concrete integument the most successively.
The glue of crossing set up based on old dam the most according to claim 4 coagulates rock-fill dams, it is characterized in that the antiseepage coefficient of described rock-fill concrete integument is 1.025 × 10-8 cm/s ~ 2.087 × 10-8 cm/s.
6. coagulate rock-fill dams according to the glue of crossing set up based on old dam described in claim 5, it is characterized in that the thickness of described cemented gravel dam layer is required to be more than 3 times of cement sand and gravel material maximum particle diameter.
The glue of crossing set up based on old dam the most according to claim 6 coagulates rock-fill dams, it is characterized in that the outer side slope of described cemented gravel dam layer is 1: 0.2 to 1:0 than for side slope ratio outside 1:0.6 ~ 1:0.8, described rock-fill concrete integument.
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| CN104929081A (en) * | 2015-06-10 | 2015-09-23 | 北京华石纳固科技有限公司 | Enrockment concrete permeable dike and construction method thereof |
| CN107700435B (en) * | 2017-09-30 | 2019-11-22 | 清华大学 | The cementing rock-fill dams of rock-fill concrete core-wall and its construction method |
| CN110130278B (en) * | 2019-05-29 | 2020-02-21 | 中国水利水电科学研究院 | Construction method of cemented dam |
| CN110468794A (en) * | 2019-07-24 | 2019-11-19 | 南通大学 | A kind of novel ecological permeable dike and its construction method |
| CN112962537A (en) * | 2021-03-08 | 2021-06-15 | 中国水电基础局有限公司 | Integrated pouring method for self-compacting rock-fill concrete dam body |
| CN113897912B (en) * | 2021-10-16 | 2022-07-26 | 浙江钱塘江水利建筑工程有限公司 | Rock-fill concrete masonry structure and construction method thereof |
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| JP3627072B2 (en) * | 1995-07-06 | 2005-03-09 | 栄三 青木 | Raise the levee body. Fill dam that can be expanded |
| CN101935995B (en) * | 2010-08-18 | 2012-02-08 | 清华大学 | Rock-fill concrete (RFC) and cemented sand and gravel (CSG) composite material dam as well as design and construction method thereof |
| CN102505667A (en) * | 2011-09-29 | 2012-06-20 | 中国水利水电科学研究院 | Cemented gravel dam |
| CN104110012A (en) * | 2014-07-28 | 2014-10-22 | 中国电建集团西北勘测设计研究院有限公司 | Low-permeability rock-fill material concrete panel rock-fill dam |
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