CN210049128U

CN210049128U - Structure located at culvert outlet

Info

Publication number: CN210049128U
Application number: CN201920697424.6U
Authority: CN
Inventors: 廖鑫; 沈敏; 王宏贵; 吴徐华; 何颖
Original assignee: PowerChina Zhongnan Engineering Corp Ltd
Current assignee: PowerChina Zhongnan Engineering Corp Ltd
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2020-02-11
Anticipated expiration: 2029-05-15

Abstract

The utility model discloses a structure that is located culvert exit, a serial communication port, include: the stilling pool (3) is used for slowing down the flowing water in the culvert (1), the stilling pool (3) is connected to the outlet of the culvert (1), and the bottom elevation of the stilling pool (3) is lower than that of the outlet of the culvert; the overflow channel (4) is connected with the stilling pool (3), and the extension direction of the overflow channel (4) is perpendicular to the extension direction of the culvert (1); the bottom elevation of the stilling pool (3) is lower than that of the overflow channel (4), and the top elevation of the stilling pool (3) is the same as that of the overflow channel (4). The utility model discloses make culvert export rivers speed reduce for rivers state keeps unanimous with the torrential rain condition rivers state, avoids causing the erosion destruction to near the structure of culvert export.

Description

Structure located at culvert outlet

Technical Field

The utility model relates to a structure that is located culvert exit belongs to hydraulic engineering technical field.

Background

The culvert is a drainage structure commonly used in highway design, when a route passes through farmlands and village sections, erosion damage is easily formed on the farmlands, houses or other structures due to high water flow speed of the culvert outlet, and in order to avoid the erosion damage, the culvert outlet is often provided with channels to lead and drain to natural brooks or rivers. In practice, some farmlands and village areas have no obvious stream ditches or rivers or need to be provided with a long ditch for drainage, so that the cost of the culvert is greatly increased, and the culvert is unreasonable in economy.

SUMMERY OF THE UTILITY MODEL

In order to reduce culvert export water velocity, furthest is the rivers overflow state under the torrential rainstorm circumstances in the culvert exit simulation, the utility model provides a structure that is located the culvert exit for export flowing water becomes the overflow state, has reduced the culvert effectively and has gone out the erosion of water to farmland, house or other structures and destroy. The specific technical scheme is as follows.

A structure at the exit of a culvert, comprising:

the stilling pool is used for slowing down the flowing water in the culvert, the stilling pool is connected to the outlet of the culvert, and the bottom elevation of the stilling pool is lower than that of the outlet of the culvert; and

the overflow channel is connected with the stilling pool, and the extending direction of the overflow channel is vertical to the extending direction of the culvert; the bottom elevation of the stilling pool is lower than that of the overflow channel, and the top elevation of the stilling pool is the same as that of the overflow channel.

Furthermore, the two sides of the stilling pool along the flowing water direction of the culvert are provided with the overflowing channels. The arrangement can lead water in the stilling pool away from the overflow channels on the two sides as much as possible. Preferably, the cross section of the overflow channel is of an inverted trapezoidal structure, so that the stability and the durability of the overflow channel can be improved.

Furthermore, the height of the top of the stilling pool is not more than 25cm higher than that of a farmland or other structures. If the soil exceeds 25cm, the soil around the stilling pool should be backfilled.

Furthermore, the stilling basin and the overflowing canal are both formed by pouring plain concrete. Preferably, a gravel cushion layer is laid below the stilling pool, so that the stilling pool can be loaded.

The utility model discloses make culvert export rivers speed reduce for rivers state keeps unanimous with the torrential rain condition rivers state, avoids causing the erosion destruction to near the structure of culvert export.

Drawings

Fig. 1 is a top view of the present invention;

fig. 2 is a cross-sectional view of the present invention.

In the figure: 1-culvert; 2-culvert outlet; 3-stilling pool; 4-a flood channel; 5-farmlands or other structures; 6-building a gravel stone cushion layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and fig. 2, concentrate the problem of erodeing to the culvert export, the utility model provides a structure that is located the culvert exit includes stilling pool 3 and overflow canal 4, and culvert export 2 is connected stilling pool 3, and stilling pool 3 links to each other with overflow canal 4 along the both sides of culvert flowing water direction, and overflow canal 4 is in the same direction as connecing the road escape canal again, and stilling pool 3 generally adopts the trapezoidal section with overflow canal 4 section, and the material generally adopts plain concrete.

The bottom elevation of the stilling pool 3 is lower than the elevation of the culvert outlet. The bottom elevation of the stilling pool 3 is lower than the bottom elevation of the overflow channel 4, the elevation of the top of the stilling pool 3 is not more than 25cm higher than that of a farmland or other structures, and otherwise, the soil around the stilling pool is backfilled. The bottom of the canal of the overflow canal 4 is a flat slope, the bottom of the canal is 50cm higher than the bottom of the stilling pool, and the top surface of the canal is flush with the top surface of the stilling pool. Before concrete of the stilling pool 3 is poured, a sand gravel cushion 6 needs to be paved on the foundation pit, and the thickness is not less than 30 cm.

Referring to fig. 1 and 2, water flow in the culvert flows out of the culvert 1 and flows into the stilling pool 3 through the outlet 2, the stilling pool 3 has effective speed reduction and energy dissipation effects on the water flow speed, when water stored in the stilling pool 3 reaches the height of the bottom of the overflow channels 4 at two sides, the water flow flows into the overflow channels 4 at two sides and then flows into the drainage ditch at low speed through the overflow channels 4, so that the water flow state is consistent with that in the case of rainstorm, and the purposes of reducing the water flow speed and avoiding erosion damage of the water flow to farmlands, houses or other structures 5 are achieved.

The embodiments of the present invention have been described above with reference to the accompanying drawings, and features of the embodiments and examples of the present invention may be combined with each other without conflict. The present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and the scope of the present invention, which is encompassed by the present invention.

Claims

1. A structure at the exit of a culvert, comprising:

the stilling pool (3) is used for slowing down the flowing water in the culvert (1), the stilling pool (3) is connected to the outlet of the culvert (1), and the bottom elevation of the stilling pool (3) is lower than that of the outlet of the culvert; and

the overflow channel (4), the overflow channel (4) is connected with the stilling pool (3), and the extending direction of the overflow channel (4) is vertical to the extending direction of the culvert (1); the bottom elevation of the stilling pool (3) is lower than that of the overflow channel (4), and the top elevation of the stilling pool (3) is the same as that of the overflow channel (4).

2. A structure at the culvert outlet according to claim 1, characterized in that the stilling basin (3) is provided with the overflow channels (4) on both sides in the culvert flow direction.

3. A structure at the culvert outlet according to claim 1 or 2, characterized in that the cross-section of the overflow channel (4) is of inverted trapezoidal configuration.

4. A structure at the culvert outlet according to claim 1, characterized in that the stilling basin (3) and the overflow channel (4) are both cast in plain concrete.

5. A structure at the culvert outlet according to claim 1, characterized in that a gravel bed (6) is laid under the stilling basin (3).