Table 3 Test conditions.

From: Study on drainage mode and anti-clogging performance of new waterproofing and drainage system in a tunnel

Test materials

Contact pressure (kPa)

Water pressure (kPa)

Convex shell drainage plate

50, 100, 200, 300, 400, 500

0.1, 0.5, 1

Capillary drain board

50, 100, 200, 300, 400, 500

20, 40, 60, 80, 100

Geotextile

50, 100, 200, 300, 400, 500

20, 40, 60, 80, 100