Infiltration system under school garden Project

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Project

School Centre City of Weinheim / Germany / 2019

Application

Stormwater infiltration

Products

DRAINMAX tunnel

Planning

Number of tunnels

33 x DM‐T/60

in three rows

required stowage volume

approx.  76 m³

Pore volume backfill material

33% (Gravel 16/32)

Area

aprrox. 150 m²

Requirements for load class

walkable

Coefficient of permeability

1x 10-4 m/s (after soil exchange)

Description

The Weststadt school centre on Breslauer Straße is the largest school construction project in Weinheim for 50 years. With this large-scale project, which includes a main building, a three-field sports hall, a schoolyard and parking areas, a total area of around 8,600m² was built.

To compensate for these sealed surfaces, 33 DRAINMAX tunnels were installed in three rows of trenches. The rainwater collected by the gravel and green roof is thus slowly seeping away below the school garden. In this project, the connection diameter of the pre-cleaning shaft complies with Din DN300.

With an impounding volume of 76 m³ and a bottom of a relatively deep 2.66 m, the DRANMAX is the best solution for reliable and sustainable infiltration.