Subdrainage systems with geodrains
SUBDRAINAGE SYSTEM WITH GEODRAINS
Water flow problems in pavement structures:
Subsurface water flow generally threatens the useful life of pavement structures, affecting them in various ways. Precipitation that flows superficially on the slopes can accumulate and infiltrate the ground, producing its saturation, affecting the load-bearing capacity of the structure, generating settlements that threaten its stability and contribute to the formation of cracks and subsidence.
Solution using geotextiles in drainage systems:
The geodrain PERMADRAIN is a geocomposite that presents in a single product a system of sewer system integral, made up of a HDPE drainage medium (geonet) that offers high resistance to compression, maintaining its thickness constant under high load requests and a non-woven geotextile filter medium that allows the efficient passage of water
Figure 1. Reduction of the water table with the Subdrainage System.
The geodrain for the longitudinal subdrainage system has a perforated pipe in its lower sheath. DRAINPIPE, which is in direct contact with the geogrid, guaranteeing the direct delivery of the water captured by it to the perforated pipe. The PERMADRAIN geodrain has high hydraulic capacity, in addition to the mechanical properties that guarantee minimal installation damage. Additionally, it is highlighted that subdrainage systems with PERMADRAIN geodrain require a smaller trench width and a smaller amount of filling drainage material, thereby achieving greater cost-efficiency.
Figure 2. PERMADRAIN Geodrain
Finally, the PERMADRAIN tubular geodrain and DRAINPIPE drainage pipe are used as an alternative for the formation of the longitudinal subdrain system with the purpose of:
• Keep the water table of the subgrade soil lowered.
• Maintain a constant humidity at a certain depth.
• Prevent volumetric changes due to expansion/contraction that can cause deformations in the structure.
Constructive process:
