Deep Well Dewatering – Non-Waterproof Retaining Wall
Often implemented by these sheeting techniques: wood or concrete lagging wall, shotcrete facing, retaining lagging wall, micro-piles, shoring retaining wall, bank
This drawdown technique is recommended when excavations are being undertaken in a non-waterproof retaining wall.
Realisation of non-waterproof peripheral retaining walls has no effect on the scaling of the water table lowering.
Several wells are usually needed to dry the construction zone.
Setting up this lowering technique will depend on several factors: geology, lowering height, adjoining structures, underpinning, and the overall environment of the site.
The deep wells technique may be realised in several types of non-waterproof walls: :
- Lagging walls
- Shotcrete facing
- Reinforced lagging walls
- Mircopiles
- Shoring retaining walls
- Banks
- Analysis and design: particular specifications, contractors tendering file, breakdown of total price, design note for the scaling, declaration of intention to commence works, local authority inspection visit etc.
- Realising deep wells with drainage blanket in outer surface
- Installation of a submersible pump inside each deep well
- Installation of the dewatering network
- Commissioning the lowering system
Our case studies
All case studies
06/08/2020
Lowering the Water Table in an Urban Area
Lowering the water table in an urban area, with disposal in the Saône through a dewatering network of 2×400 m
16/11/2020
Construction of an Office Block
Lowering the water table by bleeder wells during construction of an office building with 2 basement levels
11/06/2020
Amphitheatre Hall 3000
Lowering the water table by deep wells to construct the amphitheatre 3000 of the Cité Internationale in Lyon
