CN110747809A - Integrated silt dam without management and protection and construction method thereof - Google Patents
Integrated silt dam without management and protection and construction method thereof Download PDFInfo
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- CN110747809A CN110747809A CN201911004446.0A CN201911004446A CN110747809A CN 110747809 A CN110747809 A CN 110747809A CN 201911004446 A CN201911004446 A CN 201911004446A CN 110747809 A CN110747809 A CN 110747809A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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Abstract
The invention discloses a management-free and protection-free integrated silt dam which comprises a homogeneous earth dam body, wherein in order to improve the anti-scouring capacity of a protection slope, mixture protection layers with the thickness of 1.0-3.0 meters are arranged on the slope surfaces of an upstream dam and a downstream dam of the homogeneous earth dam body; in order to timely discharge seepage water in the dam body, a plurality of layers of drainage blind pipes are embedded in the homogeneous earth dam body at intervals, and pipe orifices of the drainage blind pipes extend out of a downstream dam slope; the dam top of the homogeneous earth dam body is filled with a mixed material layer with the thickness of 2 meters, and the mixed material layer is connected with the mixed material protective layers paved on the surfaces of the upstream dam slope and the downstream dam slope into a whole. The invention also discloses a construction method of the non-management and protection integrated check dam. The silt dam is convenient to construct, the anti-scouring capability of the upstream and downstream dam slopes is increased, the dam body can overflow, a water outlet structure can be omitted, and the engineering investment is greatly saved; meanwhile, due to the strong anti-scouring capability of the dam slope, the problem that the dam is easy to break when the silt dam passes over the over-standard flood is well solved, and meanwhile, the engineering management and protection task is simplified.
Description
Technical Field
The invention relates to the technical field of check dam construction, in particular to a management-free and protection-free integrated check dam, and further relates to a construction method of the management-free and protection-free integrated check dam.
Background
In northwest loess plateau areas of China, gullies are vertical and horizontal, water and soil loss is serious, and a large number of silt dams are built in the gullies in order to intercept silt formed by water and soil loss. The arrangement of the siltation dams is generally that a series of step dams are respectively built on the furrows, the branch ditches and the main ditches according to the area of a channel watershed, and the building of the siltation dams has very important significance for lifting a channel erosion reference surface, preventing and controlling water and soil loss, retaining flood, blocking mud, silting land, reducing river sediment and the like, and is an important measure for comprehensive treatment of small watersheds.
The currently built silt dam consists of a dam and a water discharge building, wherein the dam is generally made of local materials and is built into a homogeneous earth dam, and the flood control standard is low. Due to the fact that the number of the silt dam is large, the silt dam is distributed and dispersed, the management and protection task is huge, and the flood prevention standard of the silt dam is low, the silt dam is easy to break and damage when the silt dam is turned over in case of exceeding standard flood in a flood season, the exceeding standard flood formed when the upstream silt dam breaks can threaten the downstream silt dam, and therefore chain reaction is formed. Therefore, the invention provides a silt dam which has strong anti-scouring capability, can exceed standard flood and is free from management and protection, and is particularly urgent and necessary.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a management-free and protection-free integrated silt dam with high flood control standard and strong erosion damage prevention capability and a construction method of the management-free and protection-free integrated silt dam.
In order to achieve the purpose, the invention can adopt the following technical scheme:
the invention relates to a pipe-protection-free integrated silt dam which comprises a homogeneous earth dam body, wherein in order to improve the anti-scouring capacity of a protective slope, protective layers with the thickness of 1.0-3.0 m are arranged on the slope surfaces of an upstream dam and a downstream dam of the homogeneous earth dam body, wherein the protective layers are formed by paving and rolling a mixture which is formed by uniformly mixing damming earth materials and a argillaceous fine sand consolidation agent according to the weight ratio of 70-90: 10-30.
The dam crest of the homogeneous earth dam body is filled with a mixed material layer with the thickness of 2 meters, the mixed material layer is connected with the protective layers paved and rolled on the surfaces of the upstream dam slope and the downstream dam slope into a whole, and the mixture used by the mixed material layer is the same as the mixture used by the protective layers on the surfaces of the upstream dam slope and the downstream dam slope. The silt dam with the structure increases the anti-scouring capability of the upstream and downstream dam slopes, so that the dam body can overflow (or exceed standard flood), further a water release structure can be cancelled, and the engineering investment of the dam body is greatly saved.
Because the downstream dam slope is subjected to continuous scouring of water flow, the thickness of the downstream protective layer is larger than that of the upstream protective layer, and generally, the thickness of the protective layer of the upstream dam slope is 1.0-1.5 meters, and the thickness of the protective layer of the downstream dam slope is 2.0-3.0 meters.
In order to timely discharge seepage water in the homogeneous earth dam body, a plurality of layers of drainage blind pipes are embedded in the homogeneous earth dam body at intervals, and pipe orifices of the drainage blind pipes extend out of a downstream dam slope.
During specific construction, the distance between two adjacent layers of drainage blind pipes is 3 meters; the distance between two adjacent drainage blind pipes in the same layer is 3-5 m.
The construction method of the pipe-protection-free integrated check dam comprises the following steps:
firstly, rolling and filling a dam body of a homogeneous earth dam according to the designed section of the homogeneous earth dam and a construction method;
secondly, uniformly mixing the damming soil and the argillaceous powder fine sand consolidation agent according to the weight ratio of 70-90: 10-30 to form a mixture, conveying the mixture to the upper and lower dam slopes for paving, and synchronously rolling and constructing the mixture and a homogeneous earth dam body and lifting the mixture;
thirdly, burying a plurality of layers of drainage blind pipes at intervals in the homogeneous earth dam body, so that pipe orifices of the drainage blind pipes extend out of a downstream dam slope;
and fourthly, filling the mixture prepared in the second step within the thickness range of 2m below the elevation of the dam crest, connecting the formed mixture layer with the upper and lower slope protection impact-resistant layers into a whole, and completing the construction of the non-management and protection integrated silt dam.
The invention has the advantages of convenient construction, low construction cost and strong anti-scouring capability of the dam slope, well solves the problem that the silt dam is easy to break when over-standard flood flows, and simplifies the engineering management and protection task.
Drawings
FIG. 1 is a schematic view of the structure of a dam according to the present invention.
Detailed Description
As shown in figure 1, the non-management and protection integrated silt dam comprises a homogeneous earth dam body 1 which is rolled and filled according to a conventionally designed section, in order to improve the erosion resistance of the dam body protection slope, a protection layer with the thickness of 1.0-1.5 m, namely an upstream slope protection layer 2, is arranged on the surface of an upstream dam slope of the homogeneous earth dam body 1, a protection layer with the thickness of 2.0-3.0 m, namely a downstream anti-scouring layer 3, is arranged on the surface of a downstream dam slope, a mixture used by the protection layer is formed by uniformly mixing damming soil (loess) and argillaceous powdery fine sand consolidation agent according to the proportion of 70-90: 10-30 by weight (during actual construction, the mixture can be properly adjusted according to the soil of the concrete damming soil in the range disclosed by the invention), wherein the argillaceous powdery fine sand consolidation agent is prepared by calcining argillaceous powdery fine sand fine powder and mineral powder and cement according to the weight percentage of 70-80% -5-10% -25%, the concrete preparation method of the argillaceous powder fine sand consolidation agent is disclosed in the invention patent application of a manufacturing method of a sand consolidation agent (application number 201811405697.5, application dates 2018, 11 and 23); in order to ensure that the dam body can overflow and the dam cannot break when the flood exceeds the standard, a mixed material layer 4 with the thickness of 2 meters is filled at the top of the homogeneous earth dam body 1, the mixed material layer 4 is connected with the upstream slope protection layer 2 and the downstream anti-impact layer 3 into a whole, wherein the mixed material used by the mixed material layer 4 is the same as the mixed material used by the upstream slope protection layer 2 and the downstream anti-impact layer 3; in order to discharge the seepage water in the dam body out of the dam body in time to increase the stability of the dam body, a plurality of layers of drainage blind pipes 5 are embedded in the homogeneous earth dam body 1 at intervals, generally, every 3m of the height of the dam body rises, namely, a layer of drainage blind pipe 5 is embedded in the dam body, the distance between two adjacent drainage blind pipes in the same layer is 3-5 m (during actual construction, the drainage blind pipes 5 can be properly adjusted according to the concrete soil condition), the drainage blind pipes 5 are arranged close to a downstream dam slope, and pipe orifices of the drainage blind pipes extend out of the downstream dam slope.
The construction method of the integrated type silt dam without management and protection comprises the following steps:
firstly, rolling and filling a dam body 1 of a homogeneous earth dam according to the design section of the homogeneous earth dam and a construction method;
secondly, uniformly mixing the damming soil (loess) and the argillaceous powder fine sand consolidation agent in a temporary mixing field at a construction site according to the weight ratio of 70-90: 10-30 to obtain a mixture, conveying the mixture to upstream and downstream dam slopes of a homogeneous dam body 1 for spreading, and synchronously rolling and constructing the homogeneous dam body and lifting the homogeneous dam body; during specific construction, according to different heights of the dam body, the thickness of the upstream slope protection layer 2 is 1.0-1.5 meters, and the thickness of the downstream anti-scouring layer 3 is 2.0-3.0 meters (since the downstream dam slope is subjected to continuous scouring of water flow, the thickness of the downstream protective layer is larger than that of the upstream protective layer);
the argillaceous fine sand consolidation agent is added into the damming soil (loess), so that the strength of the upstream and downstream dam slopes is obviously improved (the strength is equivalent to C10-C15 concrete through tests), the scouring resistance and the comprehensive durability of the upstream and downstream dam slopes are improved, and the aim of no management and protection is fulfilled;
thirdly, embedding drainage blind pipes 5 (commercially available products) at intervals in the homogeneous earth dam body 1, wherein in general, when the height of the dam body rises by 3m, a layer of drainage blind pipes 5 are embedded in the dam body to reach a downstream dam slope, and the drainage blind pipes 5 can drain seepage water in the dam body out of the dam body in time so as to increase the stability of the dam body;
and fourthly, filling the dam with the same mixture as the upstream and downstream slope protection protective layers within the thickness range of 2m below the elevation of the dam crest, and connecting the formed mixture layer 4 with the upstream slope protection layer 2 and the downstream anti-impact layer 3 into a whole to finish the construction of the non-management and protection integrated silt dam.
Because the upstream dam slope, the downstream dam slope and the dam top are filled with the mixture formed by the damming soil and the argillaceous powder fine sand consolidation agent, the scouring resistance of the dam body is improved, the homogeneous earth dam body can overflow, the drainage building can be omitted, the investment is saved, and the overflow of the dam body can also exceed the standard flood.
In fig. 1, H is the height of the deposition surface, S is the water surface line, and J is the dam toe guard.
Claims (6)
1. The utility model provides a exempt from to manage and protect integral type check dam, includes the homogeneity earth dam body, its characterized in that: the surface of the upstream dam slope and the downstream dam slope of the homogeneous earth dam body are provided with protective layers with the thickness of 1.0-3.0 m, wherein the protective layers are formed by paving and rolling a mixture which is formed by uniformly mixing damming earth materials and argillaceous fine sand consolidation agents according to the weight ratio of 70-90: 10-30.
2. The maintenance-free integrated check dam according to claim 1, wherein: the dam crest of the homogeneous earth dam body is filled with a mixed material layer with the thickness of 2 meters, the mixed material layer is connected with the protective layers paved and rolled on the surfaces of the upstream dam slope and the downstream dam slope into a whole, and the mixture used by the mixed material layer is the same as the mixture used by the protective layers on the surfaces of the upstream dam slope and the downstream dam slope.
3. The maintenance-free integrated silt dam according to claim 1 or 2, wherein: the thickness of the protective layer of the upstream dam slope is 1.0-1.5 meters, and the thickness of the protective layer of the downstream dam slope is 2.0-3.0 meters.
4. The maintenance-free integrated silt dam according to claim 1 or 2, wherein: and a plurality of layers of drainage blind pipes are embedded in the homogeneous earth dam body at intervals, and pipe orifices of the drainage blind pipes extend out of a downstream dam slope.
5. The maintenance-free integrated check dam according to claim 4, wherein: the distance between two adjacent layers of drainage blind pipes is 3 meters; the distance between two adjacent drainage blind pipes in the same layer is 3-5 m.
6. A construction method of a maintenance-free integrated type check dam comprises the following steps:
firstly, rolling and filling a dam body of a homogeneous earth dam according to the designed section of the homogeneous earth dam and a construction method;
secondly, uniformly mixing the damming soil and the argillaceous powder fine sand consolidation agent according to the weight ratio of 70-90: 10-30 to form a mixture, conveying the mixture to the upper and lower dam slopes for paving, and synchronously rolling and constructing the mixture and a homogeneous earth dam body and lifting the mixture;
thirdly, burying a plurality of layers of drainage blind pipes at intervals in the homogeneous earth dam body, so that pipe orifices of the drainage blind pipes extend out of a downstream dam slope;
and fourthly, filling the mixture prepared in the second step within the thickness range of 2m below the elevation of the dam crest, connecting the formed mixture layer with the upper and lower slope protection impact-resistant layers into a whole, and completing the construction of the non-management and protection integrated silt dam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911004446.0A CN110747809A (en) | 2019-10-22 | 2019-10-22 | Integrated silt dam without management and protection and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911004446.0A CN110747809A (en) | 2019-10-22 | 2019-10-22 | Integrated silt dam without management and protection and construction method thereof |
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| CN110747809A true CN110747809A (en) | 2020-02-04 |
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| CN201911004446.0A Pending CN110747809A (en) | 2019-10-22 | 2019-10-22 | Integrated silt dam without management and protection and construction method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535249A (en) * | 2020-05-08 | 2020-08-14 | 张金良 | Non-management and protection integrated check dam and construction method thereof |
| CN113026675A (en) * | 2021-03-25 | 2021-06-25 | 黄河勘测规划设计研究院有限公司 | Non-management and protection integrated silt dam and downstream slope protection layer face construction process thereof |
| RU2768715C1 (en) * | 2021-10-13 | 2022-03-24 | Федеральное государственное бюджетное образовательное учреждение высшего образования «Государственный университет морского и речного флота имени адмирала С.О. Макарова» | Earth dam drainage system |
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2019
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Patent Citations (5)
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| CN206784329U (en) * | 2017-06-08 | 2017-12-22 | 山东水利建设集团有限公司 | A kind of Earth dam arti-seepage and row ooze structure |
| CN207846349U (en) * | 2017-11-02 | 2018-09-11 | 中国电建集团港航建设有限公司 | A kind of water blocking earth dam |
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| 王观平: "《分散性粘土与水利工程》", 31 December 1999, 中国水利水电出版社 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535249A (en) * | 2020-05-08 | 2020-08-14 | 张金良 | Non-management and protection integrated check dam and construction method thereof |
| CN113026675A (en) * | 2021-03-25 | 2021-06-25 | 黄河勘测规划设计研究院有限公司 | Non-management and protection integrated silt dam and downstream slope protection layer face construction process thereof |
| RU2768715C1 (en) * | 2021-10-13 | 2022-03-24 | Федеральное государственное бюджетное образовательное учреждение высшего образования «Государственный университет морского и речного флота имени адмирала С.О. Макарова» | Earth dam drainage system |
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Application publication date: 20200204 |
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