CN217438754U - A flood discharge box culvert structure for digging channel - Google Patents
A flood discharge box culvert structure for digging channel Download PDFInfo
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- CN217438754U CN217438754U CN202221289631.6U CN202221289631U CN217438754U CN 217438754 U CN217438754 U CN 217438754U CN 202221289631 U CN202221289631 U CN 202221289631U CN 217438754 U CN217438754 U CN 217438754U
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Abstract
The invention discloses a flood discharging box culvert structure for an excavation channel, which comprises a first box culvert, a second box culvert and a drop well, wherein the first box culvert is communicated with the first box culvert; first water retaining walls are built on two sides of the top of the first box culvert and form a culvert top flood discharge channel together with a box culvert top plate, and a drop well is arranged at the rear end of the downstream of the culvert top flood discharge channel, so that the water level elevation of flood can be reduced, and the influence of flood discharge buildings on channel maintenance roads is prevented; a second box culvert is arranged at the rear end of the downstream of the drop well, the second box culvert is used as a flood discharge channel, and the second box culvert is arranged below the channel maintenance road; a flood water inlet and a flood water outlet are respectively arranged at the front end of the flood discharging channel at the top of the first box culvert and the rear end of the second box culvert; the culvert of the first box culvert is used as a channel for the passage of channel water flow, and a channel water flow water inlet and a channel water flow water outlet are respectively arranged at the two ends of the culvert; the invention can avoid the influence of flood drainage buildings on the channel maintenance road on the premise of not influencing the water delivery and flood drainage of the excavation channel, and ensure the normal operation of the whole project.
Description
Technical Field
The invention relates to the technical field of hydraulic engineering in hydraulic engineering, in particular to a flood discharge box culvert structure for an excavation channel.
Background
The channel is used as a very common hydraulic building, is widely applied to water diversion and water supply projects, in Xinjiang areas in China, the project area is often located in a gobi beach with a large longitudinal slope, and flood has the characteristics of large flood volume, high flow rate, short duration and the like. In the channel construction process, if a safe and reliable flood discharge channel is not reserved for flood, great damage can be caused to the engineering. Channel engineering is because topography condition and channel lines spare restriction in the design process, often can appear digging the channel, to the flood discharge measure of digging the channel, generally use the mode that the row that blocks combined together, be coming flood channel side construction flood bank promptly for interception flood, build the flood discharge building at natural flood discharge passageway and channel cross department simultaneously, arrange the flood of interception to natural flood discharge passageway low reaches to guarantee the safety of channel building. A flood drainage building commonly used for excavating channels is a flood drainage aqueduct, after the flood drainage aqueduct is built, the elevation of the top of the aqueduct is higher than that of the top of a channel, a channel maintenance road is interrupted, great inconvenience is brought to channel maintenance and traffic, and therefore the flood drainage building which can drain the flood and does not influence the channel maintenance and the traffic is selected to be of great importance to the normal operation of the whole project.
Disclosure of Invention
The invention aims to provide a flood discharge box culvert structure for an excavation channel, which can reduce the water level of flood and avoid the influence on an overhaul road while discharging the flood.
In order to achieve the purpose, the invention is realized by the following technical scheme: a flood discharge box culvert structure for an excavation channel is characterized by comprising a first box culvert, a second box culvert and a drop well; constructing first water retaining walls at the top of the first box culvert along two sides of the flood water flow direction, wherein the first water retaining walls and the top of the first box culvert jointly form a culvert top flood discharge channel, and the culvert of the first box culvert is used as a channel for channel water flow to pass through; arranging a drop well for reducing the water level elevation of flood on the downstream of a culvert top flood discharge channel formed by the top of the first box culvert, arranging a second box culvert on the downstream of the drop well, taking the culvert of the second box culvert as the flood discharge channel, and repairing the road below the channel by the second box culvert.
Preferably, the first box culvert top plate extends towards the direction of the flood water flow to serve as a flip bucket.
Preferably, the flip bucket is in a bracket shape.
Preferably, the drop well comprises a drop wall formed by the first box culvert along the downstream side wall of the flood water flow direction, a drop well bottom plate and drop well side walls on two sides of the drop well, the width of the drop well along the water flow direction is the same as the width of the culvert top flood discharge channel of the first box culvert, and the top elevation of the drop well bottom plate is the same as the top elevation of the bottom plate of the second box culvert starting point.
Preferably, the second box culvert is close to the one end of drop well is provided with culvert top retaining wall, the roof elevation of culvert top retaining wall with drop well side wall roof elevation unanimous.
Preferably, the front end of the flood discharging channel at the top of the culvert of the first box culvert is provided with a flood water inlet, the flood water inlet is a splayed water inlet, and the height of the side wall of the flood water inlet is consistent with that of the first water retaining wall of the first box culvert.
Preferably, a seepage-stopping wall is arranged below the bottom plate at the inlet of the flood water inlet.
Preferably, the flood inlet may be in the form of a twisted surface inlet.
Preferably, a flood water outlet is formed in the rear end of the downstream of the second box culvert and is a splayed water outlet, and the height of the side wall of the flood water outlet is consistent with that of the second box culvert.
Preferably, a tooth wall is arranged below the bottom plate at the outlet of the flood water outlet.
Preferably, the flood outlet may be in the form of a twisted surface outlet.
Preferably, flood delivery port rear end is provided with scour protection check guest gabion, scour protection check guest gabion width with flood delivery port low reaches width unanimously, and thickness is 1 meter, and length is 3 to 10 meters.
Preferably, first box culvert both ends are provided with channel rivers water inlet and channel rivers outlet respectively, channel rivers water inlet adopts the form of turning round with channel rivers outlet side wall, and its plane spread angle is 6 degrees to 12 degrees, and length is 5 meters to 10 meters, channel rivers water inlet and channel rivers outlet's side wall height and channel highly uniform.
Preferably, rubber water stops are uniformly arranged at structural seams between the flood water inlet and the first box culvert, between the first box culvert and the drop well bottom plate, between the drop well bottom plate and the drop well side wall, and between the drop well bottom plate and the second box culvert.
The invention has the following beneficial effects:
1. the invention reduces the elevation of the flood water surface by arranging the drop well, correspondingly reduces the elevation of the flood drainage building, thereby avoiding the problems of channel maintenance and traffic caused by the interruption of a channel maintenance road and ensuring the normal operation of channel engineering.
2. The invention is provided with the flip bucket, so that the falling wall of the drop well can be prevented from being washed and damaged in the falling process of water flow.
Drawings
Fig. 1 is a plan view of a flood discharging box culvert structure for an excavation channel according to the present invention.
Fig. 2 is a longitudinal sectional view of a flood discharging box culvert structure for an excavation channel according to the present invention.
Figure 3 is a cross-sectional view a-a of a first box culvert of the flood discharging box culvert structure for an excavation channel of the present invention.
Fig. 4 is a B-B sectional view of a drop well of a flood discharging box culvert structure for an excavation channel of the present invention.
Wherein: 1. a first box culvert; 1(a), a first box culvert bottom plate; 1(b), falling the wall; 2. a drop well; 2(a), a drop well side wall; 2(b), a drop well bottom plate; 3. a second box culvert; 4. a flood water inlet; 5. a flood outlet; 6. an anti-scour gabion; 7. a tooth wall; 8. a seepage interception wall; 9. a channel; 10. stopping water by using rubber; 11. repairing roads through channels; 12. a culvert top flood discharge channel; 12(a), a first water retaining wall; 13. flip bucket; 14. a culvert top water retaining wall; 15. a channel water flow inlet; 16. a water flow outlet of the channel; 17. dredging a line; 18. and (5) an undisturbed ground line.
Detailed Description
The present invention is described in detail below with reference to the accompanying drawings, as shown in fig. 1 to 4, the present invention provides a technical solution: a flood discharge box culvert structure for an excavation channel comprises a first box culvert 1, a second box culvert 3 and a drop well 2; the first box culvert 1 is arranged at a centralized flood discharge position of the channel 9 and aims to provide a channel crossing channel for flood on the premise of not influencing water delivery of the channel 9; the top of the first box culvert 1 is built with first water retaining walls 12(a) along two sides of the flood flow direction, the first water retaining walls 12(a) and the top of the first box culvert 1 jointly form a culvert top flood discharge channel 12, in order to guarantee the flood discharge capacity of the culvert top flood discharge channel 12 and prevent the flood discharge channel from silting up, on the premise of not influencing the quality safety of the flood discharge channel, the first box culvert 1 adopts a large longitudinal slope along the flood flow direction as much as possible, the slope can be generally 1/200-1/50, the thickness of the culvert top flood discharge channel 12 water retaining walls can be 20 cm-30 cm, and the height is determined according to the flood passing amount and the ultrahigh requirement; the section size and the downstream longitudinal slope of the culvert 1 of the first box culvert need to be determined by combining with the overcurrent capacity calculation and clearance requirements, the clearance area above the water surface designed in the general culvert is 10-30% of the section area of the culvert, the clearance height between the inner vertex of the culvert and the highest water surface is not less than 0.4m, the span of the box culvert is easy to be 2-3 m, when the water flow of the channel 9 is larger, double holes or multiple holes can be adopted, the wall thickness of the single-hole box culvert is generally 1/8-1/2 of the span, the thickness of the top plate of the double-hole box culvert is 1/10-1/9 of the span, the thickness of the side wall is 1/13-1/12 of the height of the side wall, and the partition wall can be slightly thin; the first box culvert 1 is used as a falling wall 1(b) of the falling well 2 along the downstream side wall of the flood direction, in order to avoid scouring damage to the falling wall in the water flow falling process, the top plate of the first box culvert 1 extends 20cm to 30cm to the downstream of the flood direction to serve as a flip bucket 13, and the extending part is generally made into a bracket shape; the first box culvert 1 is made of cast-in-place reinforced concrete.
A drop well 2 is arranged at the rear end of the downstream of the first box culvert 1, the drop well 2 is mainly used for reducing the elevation of the flood water surface, the second box culvert 3 connected with the drop well 2 can penetrate through the lower surface of the channel maintenance road 11 for flood drainage, and the influence of a flood drainage building on the traffic of the channel maintenance road 11 and the maintenance function of the channel 9 is avoided; the drop well 2 consists of a drop wall 1(b), a drop well bottom plate 2(b) and drop well side walls 2(a) at two sides of the drop well, the width of the drop well 2 along the water flow direction is the same as that of the flood discharge channel 12 at the culvert top of the first box culvert 1, the length of the drop well 2 along the flood flow direction is larger than the horizontal projection length of a drop water tongue, the thickness of the drop well side wall 2(a) is determined according to the wall height and is at least not less than 30cm thick, the minimum thickness of the bottom plate is not less than 50cm, and the elevation of the drop well bottom plate 2(b) is the same as that of the bottom plate of the second box culvert 3; the drop well 2 is made of cast-in-place reinforced concrete.
The rear end of the downstream of the drop well 2 is connected with a second box culvert 3, the second box culvert 3 is used for discharging flood from the drop well 2 to a natural flood discharge channel, the culvert of the second box culvert 3 is used as a flood discharge channel, the width of the second box culvert 3 is the same as that of the culvert top flood discharge channel 12 of the first box culvert 1, the length is determined according to specific topographic conditions, the bottom slope of the second box culvert 3 is determined, the culvert flood discharge capacity, culvert silting conditions and topographic conditions are comprehensively considered, a larger longitudinal slope is taken as far as possible, the normal slope can be 1/200-1/50, and the section size of the second box culvert 3 is determined according to the flood flow; one end of the second box culvert 3 close to the drop well 2 is provided with a culvert top water retaining wall 14, the height of the culvert top water retaining wall 14 is consistent with that of the drop well top side wall 2(a), the thickness is determined according to the wall height, the minimum value is 30cm, and the culvert top water retaining wall 14 is mainly used for preventing water flow discharged from the flip bucket 13 from splashing to the channel maintenance road 11; the thickness of soil between the upper surface of the top plate of the second box culvert 3 and the road surface of the channel maintenance road 11 is not less than 50 cm; the second box culvert 3 is made of cast-in-place reinforced concrete.
The upstream front end of the culvert top flood discharge channel 12 of the first box culvert 1 is provided with a flood water inlet 4 which mainly functions in connecting the first box culvert 1 culvert top flood discharge channel 12 and a flood bank in sequence and smoothly leading flood water into the culvert top flood discharge channel 12, the flood water inlet 4 usually adopts a splayed water inlet, a twisted water inlet and other forms, the plane diffusion angle is 6-12 degrees, the length is generally 5-10 m, the height of the side wall of the flood water inlet 4 is consistent with that of the first retaining wall 12(a) of the culvert top flood discharge channel 12, and a seepage wall 8 which is not less than 50cm is arranged below the bottom plate at the inlet of the flood water inlet 4; the bottom plate and the side wall of the flood water inlet 4 can be made of plain concrete or reinforced concrete.
A flood water outlet 5 is arranged at the rear end of the downstream of the second box culvert 3, and is mainly used for supporting the soil mass at the outlet of the second box culvert 3, preventing the soil mass at the culvert mouth from collapsing and smoothly leading out flood water in the second box culvert 3; the flood water outlet 5 is usually in a splayed water outlet form, the plane diffusion angle of the flood water outlet 5 is 6-12 degrees, the length of the flood water outlet is generally 5-10 m, the height of the side wall of the flood water outlet 5 is consistent with that of the second box culvert 3, and a tooth wall 7 which is not less than 50cm is arranged below the bottom plate at the outlet of the flood water outlet 5; the bottom plate and the side wall of the flood water outlet 5 can be made of masonry stone, plain concrete, reinforced concrete and the like.
Be provided with scour protection check guest gabion 6 at 5 rear ends of flood delivery port, its main function causes the scour damage to ground after preventing flood outflow second box culvert 3, and 6 width of scour protection check guest gabion are unanimous with 5 low reaches widths of flood delivery port, and thickness is 1m, and 3m to 10m are got to length.
A channel water flow inlet 15 and a channel water flow outlet 16 are respectively arranged at two ends of the culvert of the first box culvert 1 and mainly used for connecting the channel 9 and the first box culvert 1 in sequence, so that the water flow of the channel 9 smoothly flows into or out of the first box culvert 1; the structure of the water channel is usually in the form of a twisted surface, an end wall and the like, the plane diffusion angle is 6-12 degrees, the length is generally 5-10 m, and the heights of the side walls of the channel water inlet 15 and the channel water outlet 16 are consistent with the height of the channel 9; the bottom plate and the side wall of the channel water flow inlet 15 and the channel water flow outlet 16 can be made of masonry, plain concrete, reinforced concrete and the like.
In conclusion, rubber sealing water 10 or other seam sealing materials are uniformly distributed at structural seams between the flood water inlet 4 and the first box culvert 1, between the first box culvert 1 and the drop well bottom plate 2(b), between the drop well bottom plate 2(b) and the drop well side wall 2(a), between the drop well bottom plate 2(b) and the second box culvert 3, so that water flow is prevented from seeping under the seam surfaces.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (13)
1. A flood discharge box culvert structure for an excavation channel is characterized by comprising a first box culvert, a second box culvert and a drop well; constructing first water retaining walls at the top of the first box culvert along two sides of the flood water flow direction, wherein the first water retaining walls and the top of the first box culvert jointly form a culvert top flood discharge channel, and the culvert of the first box culvert is used as a channel for channel water flow to pass through; arranging a drop well for reducing the water level elevation of flood on the downstream of a culvert top flood discharge channel formed by the top of the first box culvert, arranging a second box culvert on the downstream of the drop well, taking the culvert of the second box culvert as the flood discharge channel, and repairing the road below the channel by the second box culvert.
2. The flood discharging box culvert structure for excavation channels of claim 1, wherein the first box culvert roof extends in a direction of a flood flow to serve as a flip bucket.
3. The flood discharge box culvert structure for excavation channels of claim 2, wherein the flip bucket is corbel-shaped.
4. The flood discharging box culvert structure for an excavation channel according to claim 1, wherein the drop well comprises a drop wall formed by the first box culvert along the downstream side wall of the flood water flow direction, a drop well floor and drop well side walls at two sides of the drop well, the width of the drop well along the water flow direction is the same as the width of a culvert top flood discharging channel of the first box culvert, and the top elevation of the drop well floor is the same as the top elevation of the starting point floor of the second box culvert.
5. The flood discharge box culvert structure for an excavation channel of claim 4, wherein one end of the second box culvert top close to the drop well is provided with a culvert top water retaining wall, and the top elevation of the culvert top water retaining wall is consistent with the top elevation of the side wall of the drop well.
6. The flood discharging box culvert structure for the excavation channel according to claim 1, wherein a flood water inlet is arranged at the front end of the top flood discharging channel of the first box culvert, the flood water inlet is a splayed water inlet, and the height of the side wall of the flood water inlet is consistent with that of the first water retaining wall of the first box culvert.
7. The flood discharge box culvert structure for excavation channels of claim 6, wherein a cut-off wall is provided under the floor at the entrance of the flood water inlet.
8. The flood discharge box culvert structure for excavation channels of claim 6, wherein the flood water inlets may be in the form of twisted surface inlets.
9. The flood discharging box culvert structure for the excavation channel of claim 1, wherein a flood outlet is arranged at the rear end of the downstream of the second box culvert, the flood outlet is a splayed outlet, and the height of the side wall of the flood outlet is consistent with that of the second box culvert.
10. The flood discharging box culvert structure for excavation channels of claim 9, wherein a tooth wall is provided under the floor of the outlet of the flood water outlet.
11. The flood discharging box culvert structure for excavation channels of claim 9, wherein the flood outlet may be in the form of a twisted surface outlet.
12. The flood discharge box culvert structure for an excavation channel of claim 9, wherein an anti-scour gabion is arranged at the rear end of the flood water outlet, the width of the anti-scour gabion is consistent with the downstream width of the flood water outlet, the thickness of the anti-scour gabion is 1 meter, and the length of the anti-scour gabion is 3-10 meters.
13. The flood discharging box culvert structure for an excavation channel of claim 1, wherein the first box culvert is provided with a channel water flow inlet and a channel water flow outlet at two ends thereof, the channel water flow inlet and the channel water flow outlet are in the form of twisted surfaces with a plane spread angle of 6 to 12 degrees and a length of 5 to 10 meters, and the height of the channel water flow inlet and the channel water flow outlet is consistent with the height of the channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221289631.6U CN217438754U (en) | 2022-05-26 | 2022-05-26 | A flood discharge box culvert structure for digging channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221289631.6U CN217438754U (en) | 2022-05-26 | 2022-05-26 | A flood discharge box culvert structure for digging channel |
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| Publication Number | Publication Date |
|---|---|
| CN217438754U true CN217438754U (en) | 2022-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221289631.6U Active CN217438754U (en) | 2022-05-26 | 2022-05-26 | A flood discharge box culvert structure for digging channel |
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| CN (1) | CN217438754U (en) |
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- 2022-05-26 CN CN202221289631.6U patent/CN217438754U/en active Active
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