French drain
French drain
(OP)
Hi, I'm just looking the old way (formulas) to design the aggregates grading for a french drain without the geotextiles. I need to manage a seepage in a slope, but the only and unique way is to build the french drain following a secant wall construction method, so the filter fabric cannot be used. The surrounding mass is composed of a mixture of silt and clay in a limestone formation with a lot of small tunnels structure or system due to water piping.





RE: French drain
Dik
RE: French drain
here is one:
thread193-277245: Sand as French Drain liner in Clay Soil
RE: French drain
http:/
then go to Figure 4 and 4 continued on page 272 and 273
It has all the basic relations needed for filter design.