CN217267294U - Earth-rock dam body structure combining downstream stepping and over-standard flood discharging - Google Patents
Earth-rock dam body structure combining downstream stepping and over-standard flood discharging Download PDFInfo
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- CN217267294U CN217267294U CN202122954743.0U CN202122954743U CN217267294U CN 217267294 U CN217267294 U CN 217267294U CN 202122954743 U CN202122954743 U CN 202122954743U CN 217267294 U CN217267294 U CN 217267294U
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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 utility model relates to a combine low reaches to mark time and let out earth and rockfill dam body structure that exceeds standard flood. The utility model adopts the technical proposal that: be equipped with the wave wall in earth and rockfill dam upper reaches side dam crest department, be equipped with the concrete on the dam slope of earth and rockfill dam downstream side and mark time, mark time both sides at the concrete and all be equipped with the side wall earth and rockfill dam downstream side dam crest does not set up the concrete and marks time the department and install the barricade concrete road has been laid between earth and rockfill dam crest, wave wall and the barricade. The utility model discloses a game effect does: when exceeding-standard flood occurs, the flood enters the dam crest through the wave-proof wall, the flood entering the dam crest is prevented from permeating from the dam crest due to the concrete road laid on the dam crest, the flood entering the dam crest can only flow down to the dam crest along the concrete step under the grid of the retaining wall, the side walls and the retaining wall on the two sides of the concrete step ensure that flood water flow cannot scour and damage other parts of the dam slope on the downstream side of the earth-rock dam, and the problem that the earth-rock dam breaks over and breaks due to the two exceeding-standard flood is solved well.
Description
Technical Field
The utility model relates to a combine low reaches to mark time and let out earth and rockfill dam body structure that exceeds standard flood. Is suitable for the field of water conservancy and hydropower engineering.
Background
With the rapid development of water conservancy and hydropower engineering construction, more and more earth-rock dam-shaped projects are adopted in rivers, lakes and reservoirs. Generally, flood design standards are determined according to engineering and other classes, hydraulic building grades and related design specification requirements. When over-standard flood occurs, serious accidents of dam overflow and dam break of earth and rockfill dams can be caused due to the fact that flood discharge capacity of flood discharge buildings is limited. The term "over-standard flood" refers to a flood exceeding the standards for defense in rivers, lakes and reservoirs.
When the earth-rock dam engineering encounters over-standard flood, measures such as hydrologic forecast strengthening, flood diffusing in advance, emergency plan making and the like are generally adopted. This has the problems that:
(1) although the accuracy of the current hydrological forecast is greatly improved, the rainfall and the water level change condition in the reservoir in a short time are still difficult to accurately forecast. Therefore, there is a great difficulty and uncertainty in the actual operation of the dam.
(2) If flood is released in advance, the actual incoming water may be less than expected, resulting in waste of water resources.
(3) If the flood exceeds the standard, the earth and rockfill dam can overflow or break. Although an emergency plan is made, people in the downstream need to be evacuated in time in a short time, and the practical operation is difficult. Especially for a high dam and a large reservoir, if the downstream is an important town, the economic loss caused by dam break is huge, the personal safety of residents is seriously threatened, and the social influence is great.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: for solving the above-mentioned problem that causes the harm to the earth and rockfill dam when exceeding standard flood appears, the utility model provides an earth and rockfill dam body structure that exceeds standard flood was let out to safe and reliable, simple structure, construction convenience's combination low reaches mark time.
The utility model adopts the technical proposal that: the utility model provides a combine low reaches to mark time and let out earth and rockfill dam body structure of super standard flood, has earth and rockfill dam, its characterized in that: be equipped with the wave wall in earth and rockfill dam upper reaches side dam crest department, be equipped with the concrete on the dam slope of earth and rockfill dam downstream side and mark time, mark time both sides at the concrete and all be equipped with the side wall earth and rockfill dam downstream side dam crest does not set up the concrete and marks time the department and install the barricade concrete road has been laid between earth and rockfill dam crest, wave wall and the barricade.
The wave wall is L-shaped, and the bottom of the wave wall is embedded into the earth-rock dam.
The wave wall is provided with a wave wall notch for passing over-standard flood.
The retaining wall is L-shaped, and the bottom of the retaining wall is embedded into the earth-rock dam.
The top of retaining wall is equipped with along the retaining wall length direction and plants the groove.
And a cushion layer is laid below the concrete on the dam slope at the downstream side of the earth-rock dam, and geotextile is laid below the cushion layer.
And a concrete panel or a core wall seepage-proofing body is laid on the upstream side dam slope of the earth-rock dam.
And a facing structure is paved on the dam slope at the downstream side of the earth and rockfill dam, and the facing structure is a dry masonry protection slope or a concrete frame beam is paved on the dam slope at the downstream side of the earth and rockfill dam and green plants are paved in the concrete frame beam.
The beneficial effects of the utility model are that:
(1) when exceeding-standard flood occurs, the flood enters the dam crest through the wave-proof wall, the flood entering the dam crest is prevented from permeating from the dam crest due to the concrete road laid on the dam crest, the flood entering the dam crest can only flow down to the dam crest along the concrete step under the grid of the retaining wall, the side walls and the retaining wall on the two sides of the concrete step ensure that flood water flow cannot scour and damage other parts of the dam slope on the downstream side of the earth-rock dam, and the problem that the earth-rock dam breaks over and breaks due to the two exceeding-standard flood is solved well.
(2) Set up the concrete and mark time on the downstream side dam slope of earth and rockfill dam, played the step efficiency effect, through the step efficiency, effectively reduced the velocity of flow, avoided too high velocity of flow to cause to erode destruction to earth and rockfill dam foundation and low reaches river course, also be convenient for mark time the inspection tour in the reservoir operation through the concrete simultaneously.
Drawings
FIG. 1: a schematic structure diagram of the embodiment.
FIG. 2: section A-A of FIG. 1 in this example.
FIG. 3: the cross-sectional view B-B of FIG. 2 in this embodiment.
FIG. 4: the cross-sectional view of fig. 3 in this embodiment.
In the figure: 1. the concrete road, 2, the wave wall, 3, the dam slope at the upstream side of the earth and rockfill dam, 4, the gap of the wave wall, 5, the retaining wall, 6, the dam slope at the downstream side of the earth and rockfill dam, 7, the concrete step, 8, the cushion layer, 9, the geotextile, 10, the side wall, 11, the dam body of the earth and rockfill dam, 12 and the planting groove.
Detailed Description
The embodiment is an earth and rock dam body structure that surpasses standard flood is let out to combination low reaches mark time for when appearing surpassing standard flood with the flood through setting up 7 flows to the earth and rock dam downstream side of marking time of concrete on the earth and rock dam downstream side dam slope 6 of earth and rock dam body 11, avoid causing to erode the destruction to earth and rock dam downstream side dam slope 6.
In this embodiment, the top elevation of the earth-rock dam and the top elevation of the wave wall 2 need to be determined according to the engineering grade, the hydraulic structure grade, and the requirements of the relevant design specifications. An anti-seepage structure is laid on the dam slope 3 on the upstream side of the earth and rockfill dam, a wave wall 2 is arranged at the top of the upstream side of the earth and rockfill dam, the height of the wave wall 2 higher than the top of the earth and rockfill dam is 2m-4m, and the height of the top of the wave wall 2 is increased by 0.5m-1m on the basis of the calculated height.
In this example, the wave wall 2 is an "L" shaped concrete wall, and the bottom of the wave wall 2 is embedded in an earth-rock dam. And the top of the wave wall 2 is provided with a wave wall gap 4, the width of the wave wall gap 4 is 10m-30m, and the width of the wave wall gap 4 can be determined according to flood conditions, river course popularity and other comprehensive researches. Concrete panels or core wall impervious bodies are paved on the dam slope 3 on the upstream side of the earth-rock dam.
In this embodiment, the concrete steps 7 are arranged on the dam slope 6 on the downstream side of the earth-rock dam, the height of each step of the concrete steps 7 is 15cm-20cm, the width can be determined according to the slope ratio of the downstream dam slope of the earth-rock dam, and the concrete steps 7 are connected with the top and the foundation of the earth-rock dam. So be convenient for mark time 7 through the concrete and reach earth and rockfill dam crest to patrol the inspection to the reservoir behavior. On the downstream side dam slope 6 of the earth-rock dam, a cushion layer 8 is laid below the concrete, and geotextile 9 is laid below the cushion layer 8. The density of the geotextile 9 is generally 300g/m 2 -400g/m 2 And is laid under the tread cushion layer 8 of the dam slope 6 at the downstream side of the earth and rockfill dam for preventing slurry leakage when the cushion layer 8 is laid and concrete is poured. The cushion layer 8 is made of cement mortar or low-grade concrete generally, and the thickness of the cushion layer 8 is 5cm-10cm and is used for keeping the bottom of the concrete step 7 flat when the concrete step 7 is poured.
In this example, the side walls 10 with the height of 1m-2m are arranged on both sides of the concrete steps 7, and the retaining wall 5 is arranged at the dam crest on the downstream side of the earth-rock dam where the concrete steps 7 are not arranged. Therefore, flood rushing into the top of the earth and rockfill dam can only flow out of the downstream of the earth and rockfill dam along the concrete steps 7 under the blocking of the retaining wall 5 and the side wall 10, and the flood is prevented from flowing into the downstream side dam slope 6 of the earth and rockfill dam to scour and damage the downstream side dam slope 6 of the earth and rockfill dam.
In this example, the retaining wall 5 is an 'L-shaped' concrete wall, the bottom of the retaining wall 5 is embedded into an earth-rock dam, and the height of the retaining wall 5 higher than the top of the earth-rock dam is 1m-1.5 m.
In this example, a planting groove 12 is provided at the top of the retaining wall 5 in the direction of the retaining wall 5, and plants are planted in the planting groove 12.
In the embodiment, the concrete road 1 is laid between the wave wall 2 and the retaining wall 5 at the top of the earth-rock dam, the thickness of the concrete road 1 is 25cm-30cm, the concrete road has a traffic function at ordinary times, and when over-standard flood occurs, water flow can be prevented from seeping into the dam body.
In this embodiment, on the dam slope 6 on the downstream side of the earth and rockfill dam, dry masonry revetments or concrete lattice beams are laid and green plants are laid in the concrete lattice beams.
Claims (8)
1. The utility model provides a combine low reaches to mark time and let out earth and rockfill dam body structure of super standard flood, has earth and rockfill dam, its characterized in that: be equipped with at earth and rockfill dam upper reaches side dam crest department and prevent the wave wall, be equipped with the concrete of connecting earth and rockfill dam crest and earth and rockfill dam bottom on earth and rockfill dam downstream side dam slope and mark time, mark time both sides at the concrete and all be equipped with the boundary wall the earth and rockfill dam downstream side dam crest does not set up the concrete and marks time the department and install the barricade, laid the concrete road between wave wall and barricade on the earth and rockfill dam crest.
2. The earth and rockfill dam body structure for combined downstream stepping over super-standard flood discharge according to claim 1, wherein: the wave wall is L-shaped, and the bottom of the wave wall is embedded into the earth-rock dam.
3. The earth and rockfill dam body structure for combined downstream stepping to discharge super-standard flood water according to claim 1 or 2, wherein: the wave wall is provided with a wave wall notch for passing over-standard flood.
4. The earth-rock dam body structure for discharging over-standard flood combined with downstream steps of claim 1, wherein: the retaining wall is L-shaped, and the bottom of the retaining wall is embedded into the earth-rock dam.
5. An earth-rock dam body structure combined with downstream stepping to discharge over-standard flood water according to claim 1 or 4, characterized in that: the top of retaining wall leads to the length direction along the retaining wall and is equipped with planting the groove.
6. The earth-rock dam body structure for discharging over-standard flood combined with downstream steps of claim 1, wherein: and a cushion layer is laid below the concrete on the dam slope at the downstream side of the earth-rock dam, and geotextile is laid below the cushion layer.
7. The earth-rock dam body structure for discharging over-standard flood combined with downstream steps of claim 1, wherein: and a concrete panel or a core wall seepage-proofing body is laid on the upstream side dam slope of the earth-rock dam.
8. The earth-rock dam body structure for discharging over-standard flood combined with downstream steps of claim 1, wherein: and a facing structure is laid on the dam slope at the downstream side of the earth and rockfill dam, and the facing structure is a dry-laid stone protection slope or a concrete frame beam is laid on the dam slope at the downstream side of the earth and rockfill dam and green plants are laid in the concrete frame beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122954743.0U CN217267294U (en) | 2021-11-29 | 2021-11-29 | Earth-rock dam body structure combining downstream stepping and over-standard flood discharging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122954743.0U CN217267294U (en) | 2021-11-29 | 2021-11-29 | Earth-rock dam body structure combining downstream stepping and over-standard flood discharging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217267294U true CN217267294U (en) | 2022-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122954743.0U Active CN217267294U (en) | 2021-11-29 | 2021-11-29 | Earth-rock dam body structure combining downstream stepping and over-standard flood discharging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217267294U (en) |
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2021
- 2021-11-29 CN CN202122954743.0U patent/CN217267294U/en active Active
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