CN203904937U - Concrete face rockfill dam downstream dam-rear drainage belt arrangement structure - Google Patents
Concrete face rockfill dam downstream dam-rear drainage belt arrangement structure Download PDFInfo
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- CN203904937U CN203904937U CN201420334688.2U CN201420334688U CN203904937U CN 203904937 U CN203904937 U CN 203904937U CN 201420334688 U CN201420334688 U CN 201420334688U CN 203904937 U CN203904937 U CN 203904937U
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Abstract
The utility model discloses a concrete face rockfill dam downstream dam-rear drainage belt arrangement structure which comprises two main enrockment drainage belts respectively arranged at the area of the bottom of a dam body and the dam-rear pressure prop area, and the shape of the cross section of each dam-rear main enrockment drainage belt has a trapezoidal structure; two layers of geotechnical cloth are respectively laid on the top surface and the two side slope surfaces of the main enrockment drainage belts with the trapezoidal cross section structures, so that a reversed filter layer is formed; a coarse sand layer with the thickness of 0.2-0.3m is laid on the outer surface of the reversed filter layer; an upper coarse sand layer, a piece of middle geotechnical cloth and a lower coarse sand layer are sequentially laid on the bottom surface of each main enrockment drainage belt with the trapezoidal cross section structure from top to bottom. The concrete face rockfill dam downstream dam-rear drainage belt arrangement structure has the advantages that the cross section of a dam-rear drainage belt has a trapezoidal structure, so that construction is simple and convenient; a catchment area is soaked in water, thus being better in strength and deformation stability. The coarse sand layer is laid on the outer surface of the reversed filter layer, so that the two layers of geotechnical cloth are prevented from being pierced by the drainage belt as well as sharp stone corners in the secondary enrockment area and the downstream pressure prop area, and the water discharge capacity is prevented from being reduced.
Description
Technical field
The utility model relates to draining after the dam slope of face dam downstream, especially relates to drainage belt arrangement behind dam, face dam downstream.
Background technology
General face dam time rockfill area filler is the mixing enrockment that soft or hard rock or excavated material form, fine particle content is more, for guaranteeing the free drainage of dam, the hard rock rockfill area (main rockfill area) that certain length is set in the base of dam downstream of inferior rockfill area bottom Ba Neipaishuiqu, makes dam body and downstream dam slope Hou Yaqiang district draining unobstructed.Therefore, behind dam, the arrangement of drainage belt directly affects the drainage effect in dam body and dam slope Hou Yaqiang district, downstream.
Summary of the invention
The utility model object is to provide drainage belt arrangement behind dam, a kind of face dam downstream.
For achieving the above object, the utility model is taked following technical proposals:
Drainage belt arrangement behind dam, face dam described in the utility model downstream, comprises the main enrockment drainage belt that is arranged in dam body bottom section and Hou Yaqiang region, dam, and behind described dam, the section configuration of main enrockment drainage belt is trapezium structure; The end face and the sloped sides face that are positioned at the main enrockment drainage belt of described trapezoidal cross-section structure are equipped with respectively two-layer geotextiles to form loaded filter; The external surface that is positioned at described loaded filter is equipped with the coarse sands layer that 0.2m-0.3m is thick; The bottom surface that is positioned at the main enrockment drainage belt of trapezoidal cross-section structure is equipped with coarse sands layer, middle geotechnological layer of cloth, lower coarse sands layer from top to bottom successively.
After the utility model advantage is dam, drainage belt section adopts trapezium structure, makes construction simple, convenient, and catchment has good strength and deformation stability under the immersion of water.Drainage belt end face and sloped sides face are laid respectively two-layer geotextiles and are prevented the infiltration of particulate building stones in time rockfill area and Ya Qiang district, downstream and stop up drainage belt effect to form loaded filter, to play; The external surface of loaded filter is laid coarse sands layer, has prevented that in drainage belt and inferior rockfill area and Ya Qiang district, downstream, stone wedge angle punctures two floor geotextiles and reduces drainability.
Accompanying drawing explanation
Fig. 1 is arrangement schematic diagram of the present utility model.
The specific embodiment
As shown in Figure 1, drainage belt arrangement behind dam, face dam described in the utility model downstream, comprises the main enrockment drainage belt 1 that is arranged in dam body bottom section and Hou Yaqiang region, dam, and behind described dam, the section configuration of main enrockment drainage belt 1 is trapezium structure; The end face and the sloped sides face that are positioned at the main enrockment drainage belt 1 of described trapezoidal cross-section structure are equipped with respectively two-layer geotextiles to form loaded filter 2; The external surface that is positioned at described loaded filter 2 is equipped with the coarse sands layer 3 that 0.2m is thick; The bottom surface that is positioned at the main enrockment drainage belt 1 of trapezoidal cross-section structure is equipped with coarse sands layer 4, middle geotechnological layer of cloth 5, lower coarse sands layer 6 from top to bottom successively.
Behind described dam the length of main enrockment drainage belt 1 depending on downstream base of dam distance and the landform to downstream cofferdam, height and width need be determined according to the displacement of dam body displacement and left and right banks massif, main enrockment drainage belt 1 crest level will be lower than the crest level of the catchment under dam body time enrockment, the trapezoidal side slope of main enrockment drainage belt 1 is 1:1.5, rise bottom width=top width+2 * 1.5 of main enrockment drainage belt 1, the high H >=5m of drainage belt.Thick and the leveling of covering layer top layer foreign material 0.3～0.5m is removed on main enrockment drainage belt 1 basis, take can pave in the middle of geotechnological layer of cloth 5 be standard.The main task of main enrockment drainage belt 1 is draining, and this district's material compaction dry density can suitably reduce than main rockfill area, and maximum particle diameter is 1200mm, and the content that is less than 0.074mm particle is less than 5%, does not do the requirement that level is mixed, and design dry density adopts 2.15g/cm
3, corresponding porosity is 20.5%, downstream stockpile fills bed thickness and is not more than 120cm.The compacting construction parameter of catchment is consistent with main rockfill area.
Claims (1)
1. a drainage belt arrangement behind dam, face dam downstream, comprises the main enrockment drainage belt that is arranged in dam body bottom section and Hou Yaqiang region, dam, it is characterized in that: behind described dam, the section configuration of main enrockment drainage belt is trapezium structure; The end face and the sloped sides face that are positioned at the main enrockment drainage belt of described trapezoidal cross-section structure are equipped with respectively two-layer geotextiles to form loaded filter; The external surface that is positioned at described loaded filter is equipped with the coarse sands layer that 0.2m-0.3m is thick; The bottom surface that is positioned at the main enrockment drainage belt of trapezoidal cross-section structure is equipped with coarse sands layer, middle geotechnological layer of cloth, lower coarse sands layer from top to bottom successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420334688.2U CN203904937U (en) | 2014-06-23 | 2014-06-23 | Concrete face rockfill dam downstream dam-rear drainage belt arrangement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420334688.2U CN203904937U (en) | 2014-06-23 | 2014-06-23 | Concrete face rockfill dam downstream dam-rear drainage belt arrangement structure |
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| CN203904937U true CN203904937U (en) | 2014-10-29 |
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| CN201420334688.2U Active CN203904937U (en) | 2014-06-23 | 2014-06-23 | Concrete face rockfill dam downstream dam-rear drainage belt arrangement structure |
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| CN (1) | CN203904937U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532799A (en) * | 2015-01-23 | 2015-04-22 | 丰顺县梅丰水电发展有限公司 | High strength waterproof water retaining dam |
| CN108755605A (en) * | 2018-05-04 | 2018-11-06 | 中国电建集团华东勘测设计研究院有限公司 | A kind of earth and rockfill dam water discharge method and pressure slope body discharge structure |
-
2014
- 2014-06-23 CN CN201420334688.2U patent/CN203904937U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532799A (en) * | 2015-01-23 | 2015-04-22 | 丰顺县梅丰水电发展有限公司 | High strength waterproof water retaining dam |
| CN104532799B (en) * | 2015-01-23 | 2016-05-04 | 丰顺县梅丰水电发展有限公司 | High-strength waterproof checkdam |
| CN108755605A (en) * | 2018-05-04 | 2018-11-06 | 中国电建集团华东勘测设计研究院有限公司 | A kind of earth and rockfill dam water discharge method and pressure slope body discharge structure |
| CN108755605B (en) * | 2018-05-04 | 2023-12-12 | 中国电建集团华东勘测设计研究院有限公司 | Earth-rock dam drainage method and slope pressing body drainage structure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 450003 Jinshui Road 109, Zhengzhou City, Henan Province Patentee after: Yellow River Survey Planning and Design Research Institute Co., Ltd. Address before: 450003 Jinshui Road 109, Zhengzhou City, Henan Province Patentee before: Yellow River Engineering Consulting Co., Ltd. |