A structure for flash flood control

Abstract

This invention provides a structure for flood control, aiming to address the challenges of impact damage, energy dissipation and deceleration, and smooth transition between mountain flood interception ditches and urban drainage systems. The invention mainly includes a cascading water system, a gradually widening section, an energy dissipation pool, a grating, a retaining wall, a slope toe, connecting pipes, ground level, inspection wells, and an energy dissipation sill. Through a three-stage energy dissipation system (cascading water system + energy dissipation pool + energy dissipation sill), the water flow velocity is significantly reduced. The grating intercepts debris and filters wastewater before it is channeled into the urban pipe network. A liquid level sensor triggers an alarm, providing sufficient emergency response time for wastewater treatment plants. This modular structure is suitable for narrow mountain sites, with a short construction period and high practicality.

Description

Technical Field

[0001] This utility model relates to the field of urban flood control and drainage technology, and in particular to a structure for controlling flash floods. Background Technology

[0002] After rainfall in mountainous areas, the rainwater flows rapidly down the mountain surface due to the slope effect. In existing technologies, for mountains bordering towns, or mountainous areas with residents or production facilities, flood interception ditches are usually set up to connect directly with the urban drainage system, diverting rainwater from the mountainous area into the urban drainage system.

[0003] The current direct connection between mountain flood interception ditches and urban drainage systems presents the following problems: flash floods directly impact drainage pipes, causing erosion and damage; runoff carrying debris enters rivers, causing water pollution; and during heavy rains, combined stormwater and sewage flows rapidly impact wastewater treatment plants. Therefore, there is an urgent need to establish a unified connection system between mountain flood interception ditches and urban drainage systems that can simultaneously achieve energy dissipation and deceleration, debris interception, and flow warning to control flash floods. Utility Model Content

[0004] This application addresses the shortcomings of the prior art by providing a structure for flood control, which solves the problems of impact damage, energy dissipation and deceleration, and smooth connection between mountain flood interception ditches and urban drainage systems.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A flash flood control structure includes cascading steps located at the foot of the mountain slope or the outer edge of a sidewalk to receive surface runoff from the mountain.

[0007] The energy dissipation pool is connected to the downstream of the cascading water steps, and the bottom of the pool is lower than the outlet of the cascading water steps to form a drop energy dissipation zone.

[0008] The bar screen is installed vertically at the outlet end of the energy dissipation pool;

[0009] The connecting pipe has its inlet end connected to the outlet of the energy dissipation tank, and its body is buried underground.

[0010] Inspection wells, connected to energy dissipation tanks via connecting pipes, are used to direct runoff into the city's drainage system.

[0011] Furthermore, the energy dissipation pool is provided with an energy dissipation sill, which is a transversely protruding structure and is arranged at the bottom of the pool along the width direction of the energy dissipation pool.

[0012] Furthermore, an involute section is provided between the cascading steps and the energy dissipation pool, and the width of the involute section gradually increases along the direction of water flow.

[0013] Furthermore, the grille is fixedly installed by a retaining wall, which is vertically positioned at one edge of the energy dissipation pool.

[0014] Furthermore, a liquid level detection sensor is also installed inside the inspection well.

[0015] The advantages of this utility model over the prior art are as follows:

[0016] 1) Staged energy dissipation: The three-stage energy dissipation system of waterfall steps, energy dissipation pools, and energy dissipation embankments can significantly reduce the surface runoff velocity of the mountain.

[0017] 2) Pollution control: Bar screens intercept debris and filter wastewater before it is discharged into the city's pipe network;

[0018] 3) Overload warning: The liquid level sensor triggers an alarm, which, combined with tiered energy dissipation, provides sufficient emergency response time for the wastewater treatment plant;

[0019] 4) Convenient construction: The modular structure is suitable for narrow sites in mountainous areas, which can significantly shorten the construction period. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 for Figure 1 Cross-sectional view along direction A.

[0022] The components include: 1. Waterfall steps; 2. Gradual opening section; 3. Energy dissipation pool; 4. Grille; 5. Retaining wall; 6. Slope line; 7. Connecting pipe; 8. Ground surface; 9. Inspection well; 10. Energy dissipation sill. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] This utility model provides a structure for mountain flood control, aiming to solve the pain points of existing technologies in terms of impact resistance, energy dissipation and deceleration, and smooth connection between mountain flood interception ditches and urban drainage systems.

[0025] like Figure 1 and Figure 2 As shown, this utility model includes a cascading water ladder 1, which is set at the foot of the mountain slope 6 or the outer edge of the sidewalk to receive runoff from the mountain surface.

[0026] Energy dissipation pool 3 is connected downstream of cascading steps 1, and the bottom of the pool is lower than the outlet of cascading steps 1 to form a drop energy dissipation zone.

[0027] The grille 4 is vertically installed at the outlet end of the energy dissipation pool 3;

[0028] Connecting pipe 7, the inlet end of which is connected to the outlet of energy dissipation pool 3, and the pipe body is buried below ground 8;

[0029] Inspection well 9 is connected to energy dissipation pool 3 via connecting pipe 7 and is used to guide runoff into the urban drainage system.

[0030] In one embodiment of this utility model, an energy dissipation sill 10 is provided inside the energy dissipation pool 3. The energy dissipation sill 10 is a transversely protruding structure and is arranged at the bottom of the pool along the width direction of the energy dissipation pool 3.

[0031] In one embodiment of this utility model, a gradually opening section 2 is provided between the cascading steps 1 and the energy dissipation pool 3, and the width of the gradually opening section 2 gradually increases along the water flow direction.

[0032] In one embodiment of this utility model, the grille 4 is fixedly installed by a retaining wall 5, which is vertically arranged on one side edge of the energy dissipation pool 3.

[0033] In one embodiment of this utility model, a liquid level detection sensor is also provided in the inspection well 9. The liquid level detection sensor is a common device on the market. It is connected to a controller and an alarm that are very common in the field. When the liquid level in the inspection well 9 is higher than a preset value, the alarm will sound. The connection structure (not shown in the figure) and principle of the liquid level detection sensor, controller and alarm are conventional technologies in the field. The connection of any related modules commonly used in the field that can realize the above functions can be applied to this application and realize its functions. This application does not make any specific limitations.

[0034] Preferred structural embodiments and specific working principles of this utility model:

[0035] Waterfall Steps 1: Preferably, they are set along the foot of the mountain slope 6 or the outer edge of the sidewalk, and the stepped structure receives the mountain runoff;

[0036] Energy dissipation pool 3: Preferably, it is connected downstream of the cascading steps 1, and its bottom is 0.5-1.2 meters lower than the exit of the steps to form a drop energy dissipation zone;

[0037] Grille 4: Preferably, it is installed vertically at the outlet end of the energy dissipation pool 3, with a grille spacing of 10-20cm;

[0038] Connecting pipe 7: Preferably, the inlet end is connected to the outlet of energy dissipation pool 3, the pipe diameter is determined according to the actual situation, and the burial depth is ≥1.0 meter;

[0039] Inspection well 9: Preferably, it receives runoff through connecting pipe 7, and a drainage outlet at the bottom of the well is provided to connect to the urban pipe network.

[0040] During operation, the runoff from the mountain slope cascades down the cascaded steps 1, diffuses through the gradually opening section 2, and then enters the energy dissipation pool 3. In the energy dissipation pool 3, the water is blocked by the energy dissipation sill 10, creating a swirling energy dissipation effect. After passing through the screen 4 to remove impurities, the water flows through the connecting pipe 7 into the inspection well 9. When the liquid level in the well reaches the warning height, the water level sensor sends an alarm signal to the wastewater treatment plant.

[0041] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A structure for controlling flash floods, characterized in that: It includes a waterfall staircase (1), which is set at the foot of the mountain slope (6) to receive surface runoff from the mountain. The energy dissipation pool (3) is connected to the downstream of the waterfall (1), and the bottom of the pool is lower than the outlet of the waterfall to form a drop energy dissipation zone; The grid (4) is vertically installed on one side of the outlet end of the energy dissipation pool (3); Connecting pipe (7), the inlet end is connected to the outlet of energy dissipation pool (3), and the pipe body is buried below the ground (8); Inspection well (9) is connected to energy dissipation pool (3) via connecting pipe (7) and is used to guide runoff into the urban drainage system.

2. The structure for flash control according to claim 1, wherein: The energy dissipation pool (3) is provided with an energy dissipation sill (10), which is a horizontally protruding structure and is arranged at the bottom of the pool along the width direction of the energy dissipation pool (3).

3. The flood control structure of claim 1, wherein: A gradually opening section (2) is provided between the cascading steps (1) and the energy dissipation pool (3), and the width of the gradually opening section (2) gradually increases along the direction of water flow.

4. The flood control structure of claim 1, wherein: The grid (4) is fixedly installed by a retaining wall (5), which is vertically located on one side edge of the energy dissipation pool (3).

5. The flood control structure of claim 1, wherein: The inspection well (9) is also equipped with a liquid level detection sensor.

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