CN107858990B - Diversion construction method of arrangement structure of canyon area high dam ditch water treatment engineering - Google Patents
Diversion construction method of arrangement structure of canyon area high dam ditch water treatment engineering Download PDFInfo
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- CN107858990B CN107858990B CN201711330256.9A CN201711330256A CN107858990B CN 107858990 B CN107858990 B CN 107858990B CN 201711330256 A CN201711330256 A CN 201711330256A CN 107858990 B CN107858990 B CN 107858990B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
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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
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Abstract
The application discloses an arrangement structure and a diversion construction method for a high dam ditch water treatment project in a canyon area, which belong to the field of hydraulic and hydroelectric engineering. The construction method can adapt to flood in different levels, overcomes the traditional thinking that the ditch water treatment engineering can only be constructed in the dead period, ensures that the blocking dam and the drainage hole in the ditch water treatment engineering can be normally constructed in the flood period, obviously shortens the construction period, can start the whole slag yard area in advance, and brings remarkable economic and social benefits to the whole high dam engineering.
Description
Technical Field
The application relates to the field of water conservancy and hydropower engineering, in particular to an arrangement structure and a diversion construction method for a high dam ditch water treatment engineering in a canyon area.
Background
At present, a plurality of large-scale high dam hydroelectric projects such as double river mouths, two river mouths, she Batan and white crane beaches are being built in the mountain canyon area in the southwest area of China, the construction difficulty of the projects is high, the construction year limit is long, a large amount of construction waste slag in the engineering construction needs to be piled up or transported, various construction auxiliary facilities are also needed to be arranged, but the available construction sites in the near-dam area are almost not available, therefore, only the tributary gullies in the dam site area are used as large-scale gully-blocking type waste slag fields, and further, the gullies are required to be subjected to scientific and reasonable gully water treatment.
Under normal conditions, the ditch water treatment engineering is required to finish the construction of a blocking dam and a drainage hole before flood, namely the construction is required to be carried out in a dead water period, however, the drainage hole in the high dam engineering with more canyon areas is very long, the construction time is often a key line of the ditch water treatment engineering, and the construction is often difficult to finish before flood of the longer drainage hole. Meanwhile, due to extremely narrow valleys, the construction period often only adopts a diversion mode of a culvert pipe under a dam. At this time, if according to the traditional design theory, only after the drainage hole is constructed and the water is introduced, the flood diversion can be performed, and then the blocking dam or the drainage hole cannot be normally conducted in the flood season, so that the project is delayed for a flood season or even longer time, the starting time of the slag field is further delayed, and great loss is caused to the whole project.
Therefore, research on an arrangement structure and a diversion construction method of a high-dam ditch water treatment project in a canyon area, which can be normally constructed in a flood season, is urgently needed, and has important significance for the high-dam water and electricity project with urgent construction period.
Disclosure of Invention
In order to overcome the defects that the current ditch water treatment engineering has single diversion mode, cannot meet the requirements of flood season construction, causes engineering delay and the like, the application aims to solve the technical problems that: the arrangement structure and the diversion construction method of the ditch water treatment project can be used for normal construction in the flood season.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides an arrangement structure of canyon district high dam ditch water treatment engineering, includes the drain hole in the barrage and the mountain body that set up in the river course valley, and the low reaches of barrage set up heap muck field, the entry of drain hole is located barrage upper reaches, and the export is located the low reaches of heap muck field, still includes drainage construction branch hole, drainage construction branch hole is located barrage low reaches, and its entry end is linked together with the drain hole, and the exit end is linked together with the dry platform of river course that heap muck field was located.
Furthermore, the bottom of the blocking dam is provided with a diversion culvert, the inlet of the diversion culvert is communicated with an upstream river channel, and the outlet of the diversion culvert is communicated with a downstream river channel of the blocking dam.
Further, the drainage hole takes the drainage construction branch hole inlet as a demarcation point, the upstream part is the upper part of the drainage hole, the downstream part is the lower part of the drainage hole, the cross-sectional area of the upper part of the drainage hole is larger than that of the lower part of the drainage hole, the cross-sectional area of the drainage construction branch hole is the same as that of the lower part of the drainage hole, and the gradual change section of the drainage hole is positioned at the lower part of the drainage hole and is close to the inlet end of the drainage construction branch hole.
Further, a detachable temporary plugging body is arranged at the lower part of the drain hole close to the gradual change section of the drain hole; and a permanent plugging body is arranged near the inlet end of the drainage construction branch hole.
The diversion construction method of the arrangement structure of the canyon area high dam ditch water treatment project comprises the following steps:
a. constructing a drain hole inlet construction cofferdam, ensuring that river water flow cannot enter the hole, and then excavating the drain hole and a drain construction support hole;
b. embedding a diversion culvert below a dam at a proper position in a dead water period, wherein the diversion culvert has a size which can meet the design flow in the dead water period, then intercepting a river channel, then performing dam blocking construction and concrete pouring of the upper part of a drainage hole and a drainage construction branch hole, meeting the water passing and flowing condition in the flood season, simultaneously completing the concrete pouring of the lower part of the drainage hole and an outlet structure, and completing temporary plugging body pouring;
c. temporarily in the flood season, forming a temporary flood season diversion tunnel after connecting and combining the upper part of the drainage tunnel with the drainage construction branch tunnel, and continuously carrying out and completing the construction of the blocking dam and the lower part of the drainage tunnel at the moment when flood flows through the temporary flood season diversion tunnel;
d. after flood season large flood, the machine is selected to cut off the inlet of the drainage hole under the small flood flow, water flows through the diversion culvert under the dam, at the moment, the temporary blocking body is demolished by blasting, the permanent blocking body construction is carried out, and when the permanent blocking body construction is finished, the whole drainage hole has an overcurrent condition;
e. the machine is selected to cut off before the blocking dam under the small flood flow, water flows through the drainage hole, the diversion culvert is plugged at the moment, the whole ditch water treatment engineering construction is finished, and the slag piling field has slag piling conditions.
The beneficial effects of the application are as follows: the application has simple structure, convenient construction and low cost, can adapt to flood in different orders of magnitude, overcomes the traditional thinking that the ditch water treatment engineering can only be constructed in the dead period, ensures that the blocking dam and the drainage hole in the ditch water treatment engineering can be normally constructed in the flood period, obviously shortens the construction period, can start the whole slag yard area in advance, and brings remarkable economic and social benefits for the whole high dam engineering. In addition, the drainage construction support hole in the earlier stage can be used as a construction support hole of a drainage hole, so that the drainage hole construction progress is quickened, and the effect of one hole for multiple purposes is realized.
Drawings
Fig. 1 is a schematic diagram of the structure of the present application.
The figure is marked as a 1-barrage, a 2-drainage hole, a 3-slag yard, a 4-drainage construction branch hole, a 5-diversion culvert, a 6-temporary plugging body, a 7-permanent plugging body, a 21-drainage hole upper part and a 22-drainage hole lower part.
Detailed Description
The application is further described below with reference to the accompanying drawings.
As shown in fig. 1, the arrangement structure of the high dam ditch water treatment project in the canyon area comprises a blocking dam 1 arranged in a river ditch and a drain hole 2 arranged in a mountain, wherein a slag yard 3 is arranged at the downstream of the blocking dam 1, the inlet of the drain hole 2 is positioned at the upstream of the blocking dam 1, the outlet of the drain hole is positioned at the downstream of the slag yard 3, and the arrangement structure further comprises a drainage construction branch hole 4, the drainage construction branch hole 4 is positioned at the downstream of the blocking dam 1, the inlet end of the drainage construction branch hole is communicated with the drain hole 2, and the outlet end of the drainage construction branch hole is communicated with a river channel dry platform where the slag yard 3 is positioned.
In order to increase the area of the slag yard 3, a longer drain hole 2 is often needed to bypass the slag yard 3, a longer construction period is often needed for the overlong drain hole 2, the construction is often difficult to finish before flood, meanwhile, due to extremely narrow river valleys, under-dam culverts can be used for diversion in the construction period, when the blocking dam 1 or the drain hole 2 cannot conduct diversion normally in the flood season, the project is delayed for a flood season or even longer, the starting time of the slag yard 3 is further delayed, and great loss is caused to the whole project.
According to the application, the drainage construction branch hole 4 is additionally arranged behind the blocking dam 1, and flood diversion can be carried out by utilizing the drainage construction branch hole 4 before the construction of the drainage hole 2 is completed, so that the condition that the blocking dam 1 and the drainage hole 2 are constructed in the flood season is met, the construction efficiency of the whole project is greatly improved, and the engineering cost is saved.
In order to facilitate engineering construction, the bottom of the blocking dam 1 is provided with a diversion culvert 5 for assisting drainage, the inlet of the diversion culvert 5 is communicated with an upstream river, and the outlet of the diversion culvert is communicated with a downstream river of the blocking dam 1. The diversion culvert pipe 5 is mainly used for temporarily blocking the water in the construction of the blocking dam 1 and the drainage hole 2, and is required to be blocked after the whole engineering construction is completed, so that river water is prevented from entering a downstream slag yard through the diversion culvert pipe 5.
Further, the drainage hole 2 uses the inlet of the drainage construction branch hole 4 as a demarcation point, the upstream part is a drainage hole upper part 21, the downstream part is a drainage hole lower part 22, the cross-sectional area of the drainage hole upper part 21 is larger than that of the drainage hole lower part 22, the cross-sectional area of the drainage construction branch hole 4 is the same as that of the drainage hole lower part 22, and the drainage hole gradual change section is positioned at the inlet end of the drainage hole lower part 22, which is close to the drainage construction branch hole 4. The section area of the upper part 21 of the drainage hole is larger to meet the requirements of construction diversion before flood, and the section areas of the lower part 22 of the drainage hole and the drainage construction branch hole 4 are designed according to the average drainage amount so as to save construction cost.
A detachable temporary blocking body 6 is arranged at the lower part 22 of the drain hole near the gradual change section of the drain hole; a permanent plugging body 7 is arranged near the inlet end of the drainage construction branch hole 4. The temporary plugging body 6 is constructed before flood season, and is used for preventing water from entering the lower part 22 of the drainage hole which is not constructed yet; after the construction of the lower part 22 of the drainage tunnel is completed, the permanent blocking body 7 is arranged again, and the temporary blocking body 6 is removed, so that river water flows through the lower part 22 of the drainage tunnel.
The diversion construction method of the arrangement structure of the canyon area high dam ditch water treatment project comprises the following steps:
a. constructing a drain hole inlet construction cofferdam, ensuring that river water flow cannot enter the hole, and then excavating the drain hole and a drain construction support hole;
b. embedding a diversion culvert below a dam at a proper position in a dead water period, wherein the diversion culvert has a size which can meet the design flow in the dead water period, then intercepting a river channel, then performing dam blocking construction and concrete pouring of the upper part of a drainage hole and a drainage construction branch hole, meeting the water passing and flowing condition in the flood season, simultaneously completing the concrete pouring of the lower part of the drainage hole and an outlet structure, and completing temporary plugging body pouring;
c. temporarily in the flood season, forming a temporary flood season diversion tunnel after connecting and combining the upper part of the drainage tunnel with the drainage construction branch tunnel, and continuously carrying out and completing the construction of the blocking dam and the lower part of the drainage tunnel at the moment when flood flows through the temporary flood season diversion tunnel;
d. after flood season large flood, the machine is selected to cut off the inlet of the drainage hole under the small flood flow, water flows through the diversion culvert under the dam, at the moment, the temporary blocking body is demolished by blasting, the permanent blocking body construction is carried out, and when the permanent blocking body construction is finished, the whole drainage hole has an overcurrent condition;
e. the machine is selected to cut off before the blocking dam under the small flood flow, water flows through the drainage hole, the diversion culvert is plugged at the moment, the whole ditch water treatment engineering construction is finished, and the slag piling field has slag piling conditions.
Further description will be given below by way of specific examples.
Embodiment one:
in the ditch water treatment project of a water-electricity project, which needs to be carried out with a 300 m-level ultra-high rock-fill dam, the arrangement structure of the ditch water treatment project is adopted, and a specific diversion construction method is provided by combining the construction progress of a blocking dam and a drainage hole, and the steps are as follows:
A. constructing a drainage hole inlet construction cofferdam in 10 months 2015, ensuring that river water flow cannot enter the hole, and then excavating the drainage hole and a drainage construction branch hole;
B. burying a diversion culvert under a dam at a proper position in a period of 2015-4 months in the dead water, wherein the size of the culvert can meet the design flow in the dead water period, then, intercepting a river channel, and then, constructing a blocking dam; concrete pouring of the upper part of the drainage tunnel and the drainage construction branch tunnel is completed, and flood overflow conditions in flood season are met; completing the concrete pouring of the lower part of the partial drainage hole and the outlet structure, and completing the pouring of the temporary plugging body;
C. the upper part of the drainage tunnel is connected and combined with the drainage construction branch tunnel to form a temporary flood period diversion tunnel in the flood period of 5 months of 2016-6 months of 2016, flood flows through the temporary flood period diversion tunnel, and construction of the dam and the lower part of the drainage tunnel is completed at the end of 6 months of 2016;
D. after the flood period is 6 months to 7 months of the flood, 8 months of the flood selection machine in 2016 carry out inlet closure of the drainage hole under the condition of small flood flow, water flows through the diversion culvert under the dam, at the moment, the temporary blocking body is demolished by blasting, the permanent blocking body is constructed, and when the construction of the permanent blocking body is finished, the whole drainage hole has an overcurrent condition;
E. after the construction is completed, the machine is selected for 10 months in 2016 to cut off the flow before the blocking dam under the small flood flow, the water flows through the drainage hole, the diversion culvert is plugged at the moment, the whole ditch water treatment engineering construction is completed, and the slag piling field area has slag piling conditions.
If the dam body filling of the engineering can not be continuously constructed in the flood season according to the traditional ditch water treatment arrangement and diversion construction method, the construction can only be arranged in the dead period after the whole drainage tunnel is filled with water, and the time for starting up the slag piling field is pushed to 2017 for 4 months. If the application is designed according to the thought, the blocking dam and the drain hole in the ditch water treatment project can be normally constructed in the flood season, and the project can start the whole slag yard area at the end of 10 months in 2016.
Claims (1)
1. The diversion construction method of the arrangement structure of the high dam ditch water treatment project in the canyon area comprises a retaining dam (1) arranged in the river course and a drainage hole (2) in a mountain body, wherein a slag yard (3) is arranged at the downstream of the retaining dam (1), the inlet of the drainage hole (2) is positioned at the upstream of the retaining dam (1), the outlet of the drainage hole is positioned at the downstream of the slag yard (3), the diversion construction method further comprises a drainage construction branch hole (4), the drainage construction branch hole (4) is positioned at the downstream of the retaining dam (1), the inlet end of the drainage construction branch hole is communicated with the drainage hole (2), the outlet end of the drainage construction branch hole is communicated with a river trunk platform where the slag yard (3) is positioned, the bottom of the retaining dam (1) is provided with a diversion culvert pipe (5), the inlet of the diversion culvert pipe (5) is communicated with an upstream river channel, the outlet of the retaining dam (1) is communicated with the downstream, the drainage hole (2) takes the inlet of the drainage branch hole (4) as a demarcation point, the upstream part is a drainage hole (21) is positioned at the downstream part, the drainage area of the drainage branch hole (22) is larger than the drainage area of the drainage hole (22) at the downstream part (22), the drainage area is gradually changed to the drainage area of the drainage area (22) is larger than the drainage area of the drainage hole (22) at the downstream part (22) at the section, the drainage hole lower part (22) is close to the drainage hole gradual change section and is arranged with a detachable temporary blocking body (6), and the drainage construction branch hole (4) is close to the inlet end and is arranged with a permanent blocking body (7), which is characterized by comprising the following steps:
a. constructing a drain hole inlet construction cofferdam, ensuring that river water flow cannot enter the hole, and then excavating the drain hole and a drain construction support hole;
b. embedding a diversion culvert below a dam at a proper position in a dead water period, wherein the diversion culvert has a size which can meet the design flow in the dead water period, then intercepting a river channel, then performing dam blocking construction and concrete pouring of the upper part of a drainage hole and a drainage construction branch hole, meeting the water passing and flowing condition in the flood season, simultaneously completing the concrete pouring of the lower part of the drainage hole and an outlet structure, and completing temporary plugging body pouring;
c. temporarily in the flood season, forming a temporary flood season diversion tunnel after connecting and combining the upper part of the drainage tunnel with the drainage construction branch tunnel, and continuously carrying out and completing the construction of the blocking dam and the lower part of the drainage tunnel at the moment when flood flows through the temporary flood season diversion tunnel;
d. after flood season large flood, the machine is selected to cut off the inlet of the drainage hole under the small flood flow, water flows through the diversion culvert under the dam, at the moment, the temporary blocking body is demolished by blasting, the permanent blocking body construction is carried out, and when the permanent blocking body construction is finished, the whole drainage hole has an overcurrent condition;
e. the machine is selected to cut off before the blocking dam under the small flood flow, water flows through the drainage hole, the diversion culvert is plugged at the moment, the whole ditch water treatment engineering construction is finished, and the slag piling field has slag piling conditions.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108677892B (en) * | 2018-07-27 | 2024-04-19 | 中国电建集团成都勘测设计研究院有限公司 | Reconstruction structure for ecological water supply tunnel by diversion tunnel construction branch tunnel |
| CN110258476A (en) * | 2019-06-26 | 2019-09-20 | 中国电建集团成都勘测设计研究院有限公司 | High-mountain gorge areas power station ditch water process scupper structure |
| CN114541340A (en) * | 2022-03-14 | 2022-05-27 | 中国恩菲工程技术有限公司 | One-time dam-building tailing pond flood drainage system |
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