CN210636388U - Composite drainage structure of homogeneous earth dam - Google Patents
Composite drainage structure of homogeneous earth dam Download PDFInfo
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- CN210636388U CN210636388U CN201921216900.4U CN201921216900U CN210636388U CN 210636388 U CN210636388 U CN 210636388U CN 201921216900 U CN201921216900 U CN 201921216900U CN 210636388 U CN210636388 U CN 210636388U
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Abstract
The utility model discloses a compound drainage structures of homogeneity earth dam, including geotechnological cloth, main horizontal rubble drainage blanket, secondary horizontal rubble drainage blanket and vertical drain bar. The main horizontal gravel drainage layer is paved on the downstream side of the homogeneous earth dam and is tightly attached to the dam foundation, the secondary horizontal drainage layers are uniformly distributed in the homogeneous earth dam body, and the vertical drainage plates are uniformly distributed along the main horizontal gravel drainage layer and extend into the dam foundation soil layer of the homogeneous earth dam. The utility model discloses the mainly applicable ground is the homogeneity earth dam on deep overburden, full weathering layer or high water content, low strength soil layer, can effectively strengthen the stability of dam.
Description
Technical Field
The utility model relates to a compound drainage structures of homogeneity earth dam mainly is applicable to the ground and is the homogeneity earth dam of deep overburden, full weathering layer or high water content, low strength soil layer.
Background
The homogeneous earth dam is provided with the drainage facility, so that the infiltration line of the earth and rockfill dam body can be reduced, the pore water pressure of the dam body is reduced, and the stability of the dam slope is improved; controlling seepage flow, preventing seepage damage, protecting dam slope soil and preventing frost heaving damage. The earth and rockfill dam drainage type generally comprises: drainage by arrises, drainage by clinging to a slope, drainage in a dam and comprehensive drainage. The drainage in the dam is also in the forms of horizontal mattress drainage, net drainage, vertical drainage, horizontal layered drainage, hidden pipe drainage and the like.
The arrangement of the drainage device directly influences the trend and the lifting of the seepage line of the dam body, and the seepage line is related to the most dangerous sliding arc. The dam foundation and the dam body seepage field are directly related to the engineering quality, analysis and research must be carried out on the engineering quality, and corresponding measures are made according to the requirements of dam body seepage, stability and deformation. The difficulty for design engineers is how to adopt a drainage structure to enhance the stability of the dam.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: aiming at the existing problems, the composite drainage structure of the homogeneous earth dam is provided, and is mainly suitable for the homogeneous earth dam of which the foundation is a deep covering layer, a completely weathered layer or a high-water-content and low-strength soil layer.
A composite drainage structure of a homogeneous earth dam comprises geotextile, a main horizontal gravel drainage layer, a secondary horizontal gravel drainage layer and a vertical drainage plate; the main horizontal gravel drainage layer is paved on the downstream side of the homogeneous earth dam and is tightly attached to the dam foundation, and the small angle of the main horizontal gravel drainage layer is inclined to the downstream of the dam; the vertical drainage plates are uniformly arranged along the main horizontal gravel drainage layer, extend into a dam foundation soil layer of the homogeneous earth dam, and are connected with the main horizontal gravel drainage layer at the upper ends; the secondary horizontal gravel drainage layer is uniformly distributed in the homogeneous earth dam body along the height direction; the outer part of the main horizontal gravel drainage layer is wrapped by geotextile, and the downstream side of the main horizontal gravel drainage layer is not covered by geotextile; the secondary horizontal gravel drainage layer is also wrapped by geotextile, and the downstream side of the secondary horizontal gravel drainage layer is not covered by geotextile.
Further, the main horizontal gravel drainage layer (2) is inclined to the downstream of the dam at a small angle.
Adopt the technical scheme of the utility model, simple structure, construction facility, and reduced homogeneity earth dam body infiltration line, increased the drainage ability of dam body and dam foundation. The vertical drainage plate can accelerate the consolidation speed of the dam foundation of the homogeneous earth dam, improve the cohesive force value and the internal friction angle and enhance the anti-skid stability of the dam. Meanwhile, the downstream dam slope of the homogeneous earth dam improves the shear strength through the drainage measure, reduces the possibility of deformation of the dam foundation and the dam body of the homogeneous earth dam in the later period, and can be properly set up steeply in the slope ratio, thereby reducing the engineering quantity. During construction, along with the increase of filling height, drainage blanket is laid to one deck, and is comparatively convenient.
Drawings
Fig. 1 is a schematic diagram of an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Reference is made to the accompanying drawings. The utility model provides a pair of compound drainage structures of homogeneity earth dam, including geotechnological cloth 3, main horizontal rubble drainage blanket 2, secondary horizontal rubble drainage blanket 5 and vertical drain bar 4.
In the initial filling stage of the homogeneous earth dam 1, the main horizontal gravel drainage layer 2 is laid on the downstream side of the dam and is tightly attached to the dam foundation, and the small angle tends to the downstream of the dam. Meanwhile, the outer edge of the main horizontal crushed stone drainage layer 2 is wrapped by the geotextile 3, and the downstream side thereof is not covered by the geotextile.
After laying and finishing main horizontal rubble drainage blanket 2, extend main horizontal rubble drainage blanket 2 evenly to arrange vertical drain bar 4, and vertical drain bar 4 upper end passes geotechnological cloth 3, inserts main horizontal rubble drainage blanket 2, and the lower extreme stretches into in the dam foundation soil layer of homogeneity earth dam 1. The vertical drainage plates 4 are used for draining pore water in a dam foundation soil layer of the homogeneous earth dam 1 into the upper main horizontal crushed stone drainage layer 2 and are drained out of the dam body from the main horizontal crushed stone drainage layer 2.
The secondary horizontal gravel drainage layer 5 can be provided with a plurality of layers and is uniformly arranged in the homogeneous earth dam 1 along the height direction. The outer edge of the secondary horizontal gravel drainage layer 5 is wrapped by the geotextile 3, and the downstream side of the secondary horizontal gravel drainage layer is not covered by the geotextile 3. The number of layers can be laid along with the increase of arranging the dam body height in to secondary horizontal rubble drainage blanket 5, and 1 dam body cross-section width of its horizontal length adaptation homogeneity earth dam: the width of the dam bottom is wide, so that the secondary horizontal gravel drainage layer 5 is relatively long; the width of the dam crest is narrow, so the sub-horizontal gravel drainage layer 5 is relatively short. The secondary horizontal gravel drainage layer 5 is used for draining pore water in the homogeneous earth dam 1 out of the dam body.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art can change, add or replace the above examples within the scope of the present invention.
Claims (2)
1. The utility model provides a compound drainage structures of homogeneity earth dam which characterized in that: comprises geotextile, a main horizontal gravel drainage layer (2), a secondary horizontal gravel drainage layer (5) and a vertical drainage plate (4); the main horizontal gravel drainage layer (2) is paved on the downstream side of the homogeneous earth dam (1) and is tightly attached to a dam foundation; the vertical drainage plates (4) are uniformly arranged along the main horizontal gravel drainage layer (2), extend into a dam foundation soil layer of the homogeneous earth dam (1), and the upper ends of the vertical drainage plates are connected with the main horizontal gravel drainage layer (2); the secondary horizontal gravel drainage layer (5) is uniformly distributed in the homogeneous earth dam (1) along the height direction;
the outer edge of the main horizontal gravel drainage layer (2) is wrapped by geotextile, and the downstream side of the main horizontal gravel drainage layer is not covered by geotextile (3);
the outer edge of the secondary horizontal gravel drainage layer is also wrapped by geotextile, and the downstream side of the secondary horizontal gravel drainage layer is not covered by geotextile (3).
2. A composite drainage structure for a homogeneous earth dam as claimed in claim 1, wherein: the main horizontal gravel drainage layer (2) is inclined to the downstream of the dam at a small angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921216900.4U CN210636388U (en) | 2019-07-30 | 2019-07-30 | Composite drainage structure of homogeneous earth dam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921216900.4U CN210636388U (en) | 2019-07-30 | 2019-07-30 | Composite drainage structure of homogeneous earth dam |
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| CN210636388U true CN210636388U (en) | 2020-05-29 |
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| CN201921216900.4U Active CN210636388U (en) | 2019-07-30 | 2019-07-30 | Composite drainage structure of homogeneous earth dam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114134880A (en) * | 2021-09-13 | 2022-03-04 | 中电建路桥集团有限公司 | Homogeneous dam drainage structure and construction method thereof |
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2019
- 2019-07-30 CN CN201921216900.4U patent/CN210636388U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114134880A (en) * | 2021-09-13 | 2022-03-04 | 中电建路桥集团有限公司 | Homogeneous dam drainage structure and construction method thereof |
| CN114134880B (en) * | 2021-09-13 | 2023-03-21 | 中电建路桥集团有限公司 | Homogeneous dam drainage structure and construction method thereof |
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