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Differences and Advantages of Linear Drainage Channels vs. Point-Source Drainage
Comparison between Linear Drainage Systems and Traditional Point-Source Drainage
Linear drainage ditch:
■ A concise and unified linear aesthetic;
■ Linear continuous water interception for higher drainage efficiency;
■ Slope creation is simple and easy to construct;
■ Easy installation and shallow excavation depth;
■ Effectively reduces the amount of underground pipeline construction;
■ The open design of the linear drainage system’s catch basins is flush with the ground, making them easy to clean and maintain.
Point drainage:
■ Due to the requirement for four-way slope drainage, the floor is uneven, with a wavy and funnel-shaped surface.
■ Slope design and construction are relatively complex;
■ Due to the required burial depth of the pipelines, the excavation volume for construction is substantial;
■ There is a high risk of poor drainage and standing water on the ground;
■ The pipeline has become blocked, resulting in system failure;
■ Pipeline system maintenance costs are high;
■ Potential conflicts with other underground pipeline systems
I. Linear Drainage System Plan
During system design, individual drainage ditches are arranged and combined within the design spacing to form a linear system configuration, creating a continuous collection and discharge zone that optimizes drainage efficiency. This is currently one of the most commonly selected solutions for road traffic drainage systems due to its ease of construction and high drainage performance.
1. The linear prefabricated drainage channel system consists of a channel body and a cover plate, designed for continuous collection and discharge of rainwater and wastewater.
Drainage channels are available in U-shaped, V-shaped, and L-shaped configurations, depending on the outlet geometry, as well as linear curb-type drainage channels for median islands and monolithic drainage channels with high compressive strength.
For the same cross-sectional volume, linear U-shaped and L-shaped drainage channels offer greater discharge capacity than linear V-shaped channels; however, linear V-shaped channels exhibit faster flow rates and superior self-cleaning capabilities compared with linear U-shaped and L-shaped channels.
The cover plates are available in various materials (resin concrete, ductile iron, galvanized steel) and configurations (grated type, slotted type). Their key feature is the ability to select the appropriate cover plate based on specific pavement requirements, such as aesthetic appeal and load-bearing capacity.
Linear prefabricated drainage gutter systems, with their flexible design and broad applicability, are currently the dominant drainage solution on the market.
2. The linear curb drainage system is primarily designed to address drainage at the edges of traffic islands on roadways. It incorporates a drainage channel within the curb, ingeniously integrating the curb with drainage functionality to enable a single product to serve two purposes.
3. Linear integrated drainage channel system: This type of linearly installed drainage channel features a monolithic structure in which the channel body and cover are prefabricated from resin-modified concrete and permanently joined as a single unit, with no separate components. Its key characteristics include zero noise generation due to relative movement between the cover and the channel body, and a high load-bearing capacity (up to F900 class). It is typically used in specialized areas such as airports, ports, and large logistics centers.
II. Point Drainage System Scheme
It is a drainage system that collects rainwater and wastewater in a distributed manner. Rainwater and wastewater collection ditches are arranged at regular intervals along the route, and the collected water is conveyed through underground drainage channels for discharge. Point-type drainage systems are primarily used in areas with low drainage requirements, small volumes of rainwater and wastewater discharge, and significant topographic relief.
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