PPD 排水渗透仪

DRAIN PERMEAMETER - PPD

創新系統

The Drain Permeameter, "PPD", designed by EDIBON, can be used both for teaching purposes and for laboratory tests and research.

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一般說明

The Drain Permeameter, "PPD", designed by EDIBON, can be used both for teaching purposes and for laboratory tests and research.

The main element is a transparent column that can be filled with any type of soil and has a removable base where the filter material under study is placed. The unit includes as filter material three metal filters of different mesh size that can be interchanged in an easy and quick way.

Water is added to the column at constant pressure and the permeated water and soil are collected at the base, in a tank placed under the column. The discharge of the drain can be observed to evaluate the efficiency of the filter material.

To add water at constant pressure to the permeameter, water is raised by a pump from a feed tank to a water inlet tank that is connected to the upper part of the permeameter. This inlet tank has an overflow channel adjustable in height that discharges directly into the feed tank. In this way, all water that exceeds the desired level in the permeameter will return to the feed tank, thus maintaining a constant water level in the permeameter.

練習和指導練習

手册中包含的指导实践练习

  1. Research about drain filter materials.
  2. Selection of optimum filter/soil combinations.
  3. Determination of the relative efficiency of drain filter materials.
  4. Determination of the coefficient of permeability.
  5. Influence of the hydraulic load variation.

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