Initial rainwater filtering facility and method for underground cave depot matched road sponge city

By designing an underground cave reservoir supporting road sponge city-based initial rainwater filtration facility, using filter screens and fine filtered quartz sand to perform primary and secondary filtration of initial rainwater, the problems of initial rainwater pollution and pipeline blockage were solved, and efficient rainwater filtration and treatment were achieved.

CN119686426APending Publication Date: 2025-03-25CHINA RAILWAY TUNNEL GROUP CO LTD +1
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Patent Information

Application Number
CN202411915132.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-24
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

Due to severe runoff pollution in the middle and early stages of road sponge cities, the rainwater entering the rainwater pipeline network cannot contain granular impurities to avoid blocking the pipeline network. Therefore, the initial rainwater needs to be pretreated such as sewage, sedimentation, and filtration.

Method used

Design an underground cave library to provide initial rainwater filtration facilities for urban sponge, including an outer groove body and an inner groove body. The outer groove body is used to set up a gravel layer, and fine filtered quartz sand is laid in the inner groove body, initially filtered through the filter screen, and secondary filtered by the fine filtered quartz sand in the inner groove body is then used to ensure that the rainwater meets the discharge requirements of the pipeline network.

Benefits of technology

Through the design of this facility, effective filtration of initial rainwater is achieved, large particulate impurities and suspended matter are removed, sunken green spaces or water bodies are avoided, and pipeline networks are prevented, ensuring the continuity and quality of rainwater treatment.

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Abstract

The invention discloses an initial rainwater filtering facility and method for an underground cave depot matched road sponge city, the initial rainwater filtering facility comprises an outer groove body and an inner groove body, the outer groove body and the inner groove body are cuboid shells with upper openings, the inner groove body is coaxially sleeved in the outer groove body, and a first cavity is formed between the circumferential circumference of the inner groove body and the outer groove body; the bottom of the second groove and the bottom of the outer groove form a second cavity; a plurality of water seepage holes and a plurality of water filtering holes are respectively formed in the bottoms of the outer tank body and the inner tank body; fine filtering quartz sand is laid in the inner tank body; a filter screen is arranged in the outer tank body and is positioned above the inner tank body; the inner tank body is used for receiving the primarily filtered rainwater flowing down from the filter screen, and the fine filter quartz sand is used for filtering suspended matters in the primarily filtered rainwater; the filtered rainwater in the second chamber overflows downwards from the water seepage holes. The device is used for carrying out sewage interception treatment on initial rainwater, so that the initial rainwater is prevented from polluting a sunken green land or a water body, and a pipe network is prevented from being blocked.
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