A mountain flood diversion structure suitable for mountain valley type city

Abstract

The application relates to a mountain flood diversion structure suitable for a mountain-valley type city. The application is suitable for the technical field of urban flood control and drainage engineering. The technical scheme of the application is as follows: the mountain flood diversion structure suitable for the mountain-valley type city is arranged at the bottom outlet of a mountain flood ditch and comprises the following: a diversion shaft, the side wall of which is provided with an opening capable of being connected with the outlet end of the mountain flood ditch, the diversion shaft being capable of receiving the mountain flood water in the mountain flood ditch under the action of gravity and flowing by itself; a drainage culvert channel arranged outside the side wall of the diversion shaft, a first gate being arranged at the inlet of the drainage culvert channel, the first gate being capable of controlling the on-off of the water flow in the diversion shaft to the drainage culvert channel; and a mountain flood guide and drainage channel arranged outside the side wall of the diversion shaft, the mountain flood guide and drainage channel being located at a preset height below the drainage culvert channel, a second gate being arranged at the inlet of the mountain flood guide and drainage channel, the second gate being capable of controlling the on-off of the water flow in the diversion shaft to the mountain flood guide and drainage channel.

Description

Technical Field

[0001] This utility model relates to the field of urban flood control and drainage engineering technology, and in particular to a flood diversion structure suitable for mountainous river valley cities. Background Technology

[0002] Mountainous and valley-type cities are typically characterized by complex terrain, rapid runoff from flash floods, and susceptibility to flooding. Due to the limitations of their topography, these cities face not only the challenge of managing urban drainage systems when encountering heavy, prolonged rainfall, but also the need to contend with rapidly flowing flash floods. This combination significantly increases the pressure on urban drainage, often resulting in severe flooding. Furthermore, due to limited land resources, mountain flood channels in these cities are often covered with culverts during urban construction. These culverts must handle both flash floods and urban floodwaters, placing immense pressure on drainage systems. Often, they cannot drain water in time, leading to urban flooding and significant damage.

[0003] Currently, for mountainous and valley-type cities, conventional measures such as widening river channels or expanding underground pipe networks are difficult to implement and costly due to the densely populated built-up areas. They are also insufficient to cope with the combined effects of flash floods and urban flooding. Furthermore, flash floods carry large amounts of sediment, which can easily clog pipe networks. Therefore, there is an urgent need for a flash flood diversion structure suitable for mountainous and valley-type cities. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a flood diversion structure suitable for mountainous river valley cities, addressing the aforementioned problems.

[0005] The technical solution adopted in this utility model is: a flood diversion structure suitable for mountainous river valley cities, arranged at the bottom outlet of the flood gully, comprising: Diversion shafts are equipped with openings on their side walls that connect to the outlet of mountain torrent gullies. Diversion shafts can receive mountain torrents that flow by gravity within the mountain torrent gullies. The drainage culvert is located outside the side wall of the diversion shaft. A first gate is provided at the entrance of the drainage culvert, which can control the flow of water from inside the diversion shaft into the drainage culvert. The flood diversion channel is located outside the side wall of the diversion shaft. The flood diversion channel is located at a preset height below the drainage culvert channel. A second gate is installed at the entrance of the flood diversion channel. The second gate can control the flow of water from inside the diversion shaft into the flood diversion channel.

[0006] Using the aforementioned technical means, diversion shafts are installed at the junction of mountain torrent gullies and drainage culverts. These diversion shafts can receive the water flow from the mountain torrent gullies. Based on the rainfall, the opening and closing of the first and second gates are controlled to allow a large amount of water generated in a short period of time to be discharged through the mountain torrent drainage channel, thereby relieving drainage pressure in the urban area and reducing the risk of urban flooding.

[0007] In some embodiments, a sludge collection pit is provided on the inner bottom periphery of the diversion shaft, which can collect the sediment and sand after the water in the diversion shaft has settled.

[0008] The beneficial effects of this utility model are: 1. The status of the first and second gates can be flexibly adjusted according to actual rainfall and flash flood flow to more effectively manage water flow direction and adapt to different rainfall intensities. A well-designed diversion structure can effectively disperse the pressure of flash flood flow, reduce the load on urban drainage systems, and improve overall flood control capacity. Because it can guide flash floods containing large amounts of silt into specific drainage channels, it helps reduce the impact of silt on urban drainage networks and lowers the risk of pipe blockage caused by siltation. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this application.

[0010] Explanation of reference numerals in the attached figures: 1. Diversion shaft; 2. Mountain torrent ditch; 3. Drainage culvert; 4. Mountain torrent diversion channel; 5. First gate; 6. Second gate; 7. Sewage collection pit.

[0011] This specification includes references to "one embodiment" or "implementation". The use of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. Specific features, structures, or characteristics may be combined in any suitable manner consistent with this disclosure.

[0012] The term "comprising" is open-ended. As used in the appended claims, it does not exclude additional structures or steps.

[0013] "First," "second," etc. As used in this article, these terms serve as labels for the nouns preceding them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.).

[0014] The term "based on," as used herein, describes one or more factors that influence the determination. This term does not exclude additional factors influencing the determination. That is, the determination may be based solely on these factors or at least partially on them. Consider the phrase "A is determined based on B." In this case, B is the factor influencing the determination of A, and such phrases do not exclude the possibility that the determination of A may also be based on C. In other instances, A may be determined solely on B. Detailed Implementation

[0015] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to specific embodiments.

[0016] Combination Figure 1 As shown, this embodiment is a flood diversion structure suitable for mountainous river valley cities, located at the bottom outlet of a flood ditch 2. It includes a diversion shaft 1, a drainage culvert 3, and a flood discharge channel 4. The diversion shaft 1 has an opening on its side wall that connects to the outlet of the flood ditch 2, allowing it to receive the floodwater flowing from the flood ditch 2 under gravity. The drainage culvert 3 is located outside the side wall of the diversion shaft 1, with a first gate 5 at its inlet. The first gate 5 controls the flow of water from the diversion shaft 1 into the drainage culvert 3. The flood discharge channel 4 is also located outside the side wall of the diversion shaft 1, on the same side as the drainage culvert 3. The flood discharge channel 4 is positioned at a predetermined height below the drainage culvert 3, and a second gate 6 is located at its inlet. The second gate 6 controls the flow of water from the diversion shaft 1 into the flood discharge channel 4.

[0017] Furthermore, in this embodiment, the diversion shaft 1 is constructed using caisson technology, and the flash flood drainage channel 4 is constructed using pipe jacking technology. The flash flood drainage channel 4 can quickly discharge flash floods into external rivers or pump station forebays during the flood season, preventing flash floods from entering the urban drainage system, thereby effectively alleviating the pressure on urban drainage.

[0018] Furthermore, flash flood confluence can be determined through on-site inspections during the flood season or heavy rain, or by monitoring flow rates using engineering information technology to determine whether a flash flood has occurred. There are no restrictions on the gate control method in this embodiment; both electrical and manual control are acceptable. Generally, gates possess both methods simultaneously, and the gate control in this embodiment employs conventional control methods.

[0019] In some implementation schemes, a sludge collection pit 7 is provided on the inner bottom periphery of the diversion shaft 1. The sludge collection pit 7 can collect the sediment and silt that settles in the water inside the diversion shaft 1 for centralized treatment. It also allows for easy placement of a temporary sewage pump for pumping and maintenance. If sediment settles in the middle of the bottom slab, it needs to be cleaned regularly by hand or mechanical means and discharged into the sludge collection pit for centralized treatment, such as by pumping it out.

[0020] The implementation principle of a flood diversion structure applicable to mountainous valley cities in this embodiment is as follows: During the flood season, the mountain torrents in the mountain torrent gully 2 flow rapidly and quickly. The second gate 6 can be opened and the first gate 5 closed, allowing the floodwaters to be quickly discharged through the mountain torrent diversion channel 4, preventing them from entering the urban area and reducing urban drainage pressure. During the non-flood season, the second gate 6 can be closed and the first gate 5 opened. The diversion shaft 1 can be used as a sedimentation tank to reduce the flow velocity of the water in the mountain torrent gully 2. Natural sedimentation allows the silt carried by the water to enter the collection pit 7, where the silt is centrally treated, reducing blockage of the drainage culvert channel 3 within the city. The settled clear water can then enter the drainage culvert channel 3 to remove silt and impurities. The diversion shaft 1 can also be used for municipal water storage, providing water for roadside and greening irrigation during the non-flood season when no flood discharge is required.

[0021] The structure described in this application is simple, easy to implement, and requires minimal engineering work. It can effectively improve urban drainage standards and enhance the city's drainage and flood control capabilities, as well as its ability to cope with extreme weather. Conventional underground pipe network expansion generally refers to the demolition and reconstruction of the existing pipe network to create a larger capacity network. Compared to traditional river widening or underground pipe network expansion, this structure can preserve the existing pipe network, requires less land, involves virtually no demolition, and can be implemented quickly to solve the problem of insufficient existing pipe network capacity. It is more suitable for mountainous and valley-type cities with dense urban buildings and insufficient surface drainage channels.

[0022] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A flood diversion structure suitable for mountainous valley cities, characterized in that, Located at the bottom outlet of the mountain torrent gully (2), including: Diversion shaft (1) has an opening on its side wall that can connect to the outlet of the mountain torrent ditch (2). Diversion shaft (1) can receive the mountain floodwater that flows by gravity within the mountain torrent ditch (2). The drainage culvert (3) is located outside the side wall of the diversion shaft (1). A first gate (5) is provided at the entrance of the drainage culvert (3). The first gate (5) can control the flow of water from the diversion shaft (1) into the drainage culvert (3). The flood diversion channel (4) is located outside the side wall of the diversion shaft (1). The flood diversion channel (4) is located at a preset height below the drainage culvert channel (3). A second gate (6) is provided at the entrance of the flood diversion channel (4). The second gate (6) can control the flow of water from the diversion shaft (1) into the flood diversion channel (4).

2. The flood diversion structure suitable for mountain valley cities according to claim 1, characterized in that: The bottom periphery of the diversion shaft (1) is provided with a sludge collection pit (7), which can collect the sediment after the water in the diversion shaft (1) has settled.

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