Bidirectional water collecting ditch suitable for mountain-surrounding road
By designing a two-way drainage ditch suitable for mountain roads, and using U-shaped and L-shaped concrete structures and permeable filters, the problem of water pollution in the drainage ditch has been solved, improving water quality and construction efficiency. It is particularly suitable for special environments such as islands.
Patent Information
- Application Number
- CN202520207898.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-10
AI Technical Summary
The water quality in the drainage ditches along the mountain road is deteriorated due to pollution from heavy metals and hydrocarbons in vehicle exhaust fumes, and existing technologies are unable to effectively treat it.
Design a bidirectional drainage ditch, including U-shaped and L-shaped concrete drainage components, combined with a pre-settling tank and a permeable filter, to treat mountain runoff by means of water interception and filtration, collecting rainwater from the mountain and road surface respectively, and using a permeable filter for initial sedimentation and filtration to ensure water quality.
It improves the water quality of the drainage ditches along the mountain road, reduces construction difficulty and speed, and is particularly suitable for island areas with fragile ecosystems, insufficient freshwater, insufficient power supply, and poor transportation, thereby improving water collection efficiency.
Smart Images
Figure CN223838233U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of road drainage technology, specifically a two-way drainage ditch suitable for mountain roads. Background Technology
[0002] Mountainous areas have high vegetation coverage, resulting in good quality rainwater runoff. In water-scarce regions, this runoff is collected and stored as a drinking water source. Drainage ditches are installed along the mountainside of roads to collect hillside runoff and surface water to ensure roadbed safety. However, surface runoff contains highly hazardous pollutants such as heavy metals and hydrocarbons from vehicle exhaust, which deteriorate the water quality in the drainage ditches. Utility Model Content
[0003] In view of the problem of water pollution in the drainage ditches of existing mountain roads, this utility model proposes a two-way drainage ditch suitable for mountain roads.
[0004] The present invention provides a bidirectional drainage ditch suitable for mountain roads, characterized in that the bidirectional drainage ditch includes a first drainage component and a second drainage component, wherein:
[0005] The first water-collecting component is a U-shaped concrete structure with a plain concrete pad at the bottom. A pre-sinking trough is set on the hillside side of the first water-collecting component. A second water-collecting component is set on the road side of the first water-collecting component. The second water-collecting component is an L-shaped concrete structure with a plain concrete pad at the bottom.
[0006] The first water collection component has rainwater grates spaced along its side wall, connecting the pre-settling tank and the first water collection component. After initial settling in the pre-settling tank, the mountain water flows through the filter and enters the first water collection component through the rainwater grates, ensuring the quality of the collected water.
[0007] Furthermore, the pre-settling tank is filled with a permeable filter body, which is of the reverse slope type, with the side closest to the first water collection structure facing the top of the slope. The permeable filter body consists of, from top to bottom, turf, a soil layer, geotextile, a graded gravel layer, and geotextile again. The turf is used to ensure the landscape effect; the soil layer is laid under the turf to provide nutrients for the turf. The soil layer is rich in various nutrient substrates, which can maintain the long-term healthy growth of the turf. Moreover, the soil layer is rich in high-polymer fibers, and its physical structure is very stable. It can be bent at will and will not loosen even when crushed. Even if gravel falls from the hillside, there is no need to replace the filter body later. It is suitable for harsh natural conditions and inconvenient later management and maintenance. Geotextile is laid on the top and bottom of the graded gravel layer to ensure drainage and filtration effects.
[0008] Furthermore, the top of the turf slope is at the same elevation as the top of the first water collection component, which has the effect of intercepting and storing water from the mountain. The bottom elevation of the graded gravel layer is at the same elevation as the bottom elevation of the rainwater grate on the side wall of the first water collection component, ensuring that all the rainwater collected in the pre-settling trough can be drained away, avoiding the problem of long-term water accumulation affecting the quality of the collected water.
[0009] The first water collection component is equipped with a rain grate at the top. When the rainfall amount and intensity are large, the rainwater can directly flow into the water collection ditch from the top after initial settling in the pre-settling tank. The rain grate at the top can intercept falling rocks from the mountain, preventing them from blocking the channel and affecting the overall water collection effect.
[0010] This utility model relates to a bidirectional drainage ditch suitable for mountain roads. By transforming the common unidirectional drainage ditch into a bidirectional drainage system, the first drainage component closer to the mountain collects mountain runoff, while the second drainage component closer to the road collects rainwater from the road surface; the two components do not mix. Combined with a pre-settling tank and a permeable filter, the drainage ditch pre-treats the mountain runoff using both "water interception" and "water filtration" methods, thus ensuring the drainage quality of the first drainage component. Especially for island areas with fragile ecosystems, insufficient freshwater, inadequate power supply, poor transportation, and lagging infrastructure development, the application of bidirectional drainage ditches can effectively reduce construction difficulty, increase construction speed, and improve drainage efficiency in the process of collecting drinking water sources. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of a two-way drainage ditch structure with rainwater grates installed on the side wall.
[0012] Figure 2 This is a schematic diagram of a two-way drainage ditch structure without rainwater grates installed on the side walls.
[0013] Figure 3 This is a schematic diagram of the structure of a permeable filter.
[0014] The components include: a first water-collecting component 1, a second water-collecting component 2, a pre-settling trough 3, a plain concrete cushion layer 4, a rainwater grate 5, turf 3-1, a soil layer 3-2, geotextile 3-3, and a graded gravel layer 3-4. Detailed Implementation
[0015] Example 1: A bidirectional drainage ditch suitable for mountain roads, comprising a first drainage component 1 and a second drainage component 2, wherein:
[0016] The first water-collecting component 1 is a U-shaped concrete structure. It can be prefabricated using lightweight, corrosion-resistant new materials such as resin concrete. It is assembled directly on-site, reducing construction difficulty and enabling rapid construction and durable use even in harsh environments like islands. It requires minimal maintenance, reducing manpower. A plain concrete base layer 4 is placed at the bottom of the first water-collecting component 1. A pre-sinking trough 3 is installed on the hillside side of the first water-collecting component 1. A second water-collecting component 2 is installed on the roadside side of the first water-collecting component 1. This second water-collecting component 2 is an L-shaped concrete structure, generally cast on-site, but can be prefabricated in special cases. However, during prefabrication, the construction site must ensure a seamless connection between the second water-collecting component 2 and the first water-collecting component 1. Type B water-collecting ditches are used to collect road runoff. They have a smaller flow rate and are generally smaller in size, with specific dimensions determined by the road width and grade. A plain concrete base layer 4 is placed at the bottom of the second water-collecting component 2.
[0017] The top of the first water collection component 1 should be 10cm higher than the road surface of the ring road. Its main function is to prevent rainwater from the second water collection component 2 from overflowing into the first water collection component 1 and affecting the water quality in the event of heavy rainfall.
[0018] A portion of the first water-collecting component 1 has rainwater grates installed on its side walls, connecting the pre-settling trough 3 and the first water-collecting component 1. After initial settling in the pre-settling trough 3, the mountain runoff passes through the filter and enters the first water-collecting component 1 through the rainwater grate 5, ensuring the quality of the collected water. Simultaneously, a rainwater grate is installed on the top of the first water-collecting component 1. These rainwater grates are all made of cast iron and fixed with angle steel for easy maintenance. Another portion of the first water-collecting component 1 has no rainwater grates on its side walls. The main purpose of this rainwater grate-free design is to ensure the overall stability and long-term effectiveness of the water collection ditch under the lateral slope soil pressure. The two types of first water-collecting components 1 are arranged alternately to form a complete and stable water collection ditch.
[0019] The first water collection component 1 is equipped with a pre-settling trough 3 on the hillside side. The width and slope of the pre-settling trough 3 are determined by comprehensively considering the drainage volume, the scale of the water collection ditch, and the available space on site. The width should preferably be 400mm-1500mm, and the height difference between the bottom and top of the slope should preferably be within 500mm. The pre-settling trough 3 is filled with a permeable filter body, which is of the reverse slope type, with the side closest to the first water collection component facing the top of the slope. The permeable filter body consists of, from top to bottom, turf, a soil layer, geotextile, a graded gravel layer, and geotextile again.
[0020] A 10cm thick C20 plain concrete pad 4 is provided at the bottom of the first water-collecting component 1 and the second water-collecting component 2.
Claims
1. A bidirectional drainage ditch suitable for mountain roads, characterized in that... It includes a first water-collecting component (1) and a second water-collecting component (2), wherein: the first water-collecting component (1) is a U-shaped concrete structure with a plain concrete cushion layer (4) at the bottom, and a pre-sinking trough (3) is set on the hillside side of the first water-collecting component (1); the second water-collecting component (2) is set on the road side of the first water-collecting component (1), and the second water-collecting component (20) is an L-shaped concrete structure with a plain concrete cushion layer (4) at the bottom.
2. A bidirectional drainage ditch suitable for mountain roads as described in claim 1, characterized in that... The first water collection component (1) has rainwater grates spaced apart on its side wall, connecting the pre-settling tank (3) and the first water collection component (1).
3. A bidirectional drainage ditch suitable for mountain roads as described in claim 1, characterized in that... The pre-settling tank (3) is filled with a permeable filter body. The permeable filter body is of the reverse slope type, with the slope top direction being the side closest to the first water collection structure. The permeable filter body consists of turf, a soil layer, geotextile, graded gravel layer and geotextile from top to bottom.
4. A bidirectional drainage ditch suitable for mountain roads as described in claim 3, characterized in that... The top of the turf slope is at the same elevation as the top of the first water collection component (1), and the bottom elevation of the graded gravel layer is at the same elevation as the bottom of the rain grate on the side wall of the first water collection component (1).
5. A bidirectional drainage ditch suitable for mountain roads as described in claim 1, characterized in that... The first water collection component (1) has a rain grate installed on its top.