Filter Assembly for Earth Retaining Structures with Check Valve
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Solution Overview
Problem
Conventional filter assemblies for earth retaining structures fail to effectively manage hydrostatic water pressure and prevent backflow of high head pressure, leading to potential structural failure over time.
Innovation Solution
A filter assembly comprising a grate portion with drainage holes, a check valve portion with a valve member to prevent backflow, and a filter portion with a conical mesh body and gasket system, which includes a filter cartridge and geotextile fabric to filter out sediment, ensuring proper drainage and preventing water from passing backward.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional filter assemblies are used for drainage, then water can pass through, but sediment passes through with the water and backflow cannot be prevented
Solution Approach 1:
The patent combines the check valve mechanism and filter assembly into a single integrated unit. The check valve portion is directly connected to the filter portion, eliminating the need for separate backflow prevention devices. This merging approach maintains reliability by preventing backflow while avoiding additional complexity from multiple separate components.
Solution Approach 2:
The filter assembly serves multiple functions simultaneously: it filters sediment from water, prevents backflow through the check valve mechanism, and provides structural support through the grate portion. This multi-functionality improves reliability by addressing multiple drainage problems in one system without proportionally increasing complexity.
2Productivity
If high head pressure is allowed to pass through the filter, then drainage is efficient, but sediment and contaminated water pass back into the system
Solution Approach 1:
The filter portion uses a conical mesh structure with varying aperture sizes - larger openings at the top that gradually decrease toward the bottom. This local variation in filter quality allows efficient water passage while progressively filtering out sediment particles, maintaining drainage productivity without allowing contamination.
Solution Approach 2:
The conical mesh body and filter fabric create a porous structure that permits water flow while trapping sediment. The porous nature of the filter materials enables efficient drainage by allowing water to pass through while blocking solid particles, preventing contamination even under high head pressure.
3Productivity
If the filter assembly allows all water to pass through, then drainage is maximized, but the structural integrity deteriorates due to unfiltered sediment
Solution Approach 1:
The conical mesh and filter fabric provide a porous filtration system that maintains high water flow rates while removing sediment. The porous structure allows maximum water passage without compromising structural integrity, as filtered water does not carry abrasive particles that would degrade the retaining structure over time.
Solution Approach 2:
The filter assembly uses composite construction combining the conical mesh body with filter fabric and reinforced frame structures. This composite approach maintains structural strength while enabling efficient water filtration, ensuring both productivity and long-term structural integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The filter assembly effectively relieves hydrostatic water pressure, prevents backflow, and maintains structural integrity by allowing water to drain while filtering out sediment, thus enhancing the durability of earth retaining structures.
Implementation Method 1
a filter portion with a conical mesh body and gasket system, which includes a filter cartridge and geotextile fabric to filter out sediment
Implementation Method 2
a check valve portion with a valve member to prevent backflow
Data Source
AI summary
A filter assembly includes a grate portion having a plurality of drain passages therein. A check valve portion includes a first end connected to the grate portion and a filter portion is connected to a second end of the check valve portion. The grate portion, the check valve portion and the filter portion are disposed in a hole in a concrete structure.