Methods of use and application of the wellpoint system

Wellpoint system operation

Pumping from a single wellpoint with formation of the cone of depression. Interaction between the cones of depression produced by 2 adjacent wellpoints with consequent superimposition of the draining effects.

Soil drainage with wellpoint system

Draining effect produced by a wellpoint array set up in a ring with respect to the area to be drained.

Environmental remediation

Pollutants interception in groundwater. Use of the wellpoint system to intercept a flow of pollutants produced by a landfill (illegal or improperly waterproofed) and leached into groundwater.

Environmental remediation: air-nutrient insufflation

se of the wellpoint system to inject chemical compounds aimed at reducing pollution into polluted soils. Option of also using gas mixtures, by replacing the pump with an air compressor.

River water supply: use of the wellpoint system to extract water from the subsoil, required to feed the storage tanks

River water supply: use of the wellpoint system to extract water from the subsoil, required to feed the storage tanks

Basin water supply

Use of a wellpoint system to lay horizontal drainage pipes used for the water supply from the subsoil in an area located near a natural basin (lake or sea coast).

Subway drainage: filtration water (1)

Use of drain pipes arranged in a cap and placed in a vacuum by a self-priming pump, to intercept and remove the filtration water during the excavation works of a rock tunnel.

Subway drainage: filtration water (2)

Use of drain pipes arranged in a cap and placed in a vacuum by a self-priming pump, to intercept and remove the filtration water during the excavation works of a rock tunnel.

Subway drainage: groundwater

Soil drainage during the excavation works of a subway tunnel, in loose soil. Temporary abatement and control of the groundwater level for excavation and casting, in drained conditions, of the tunnel inverted arch.

Permanent drainage with level sensors

Permanent wellpoint system, driven by level probes, used to continuously and definitively control the rising of the groundwater level.

Drainage of excavations

Temporary abatement and control of the phreatic zone to perform drainage of a foundation excavation.

Foundation excavation with “sheet piling” (A)

Soil drainage within a watertight bulkhead (sheet piles or diaphragms), with the abatement and control of the groundwater level in a single stage. Replacement of the vertical drainage (wellpoint) with a horizontal drainage in the final stage of the excavation. The horizontal drainage pipes, placed in a vacuum by the self-priming pump, intercept and remove the filtered water under the bulkhead.

Foundation excavation with “sheet piling” (B)

Soil drainage within a watertight bulkhead (sheet piles or diaphragms), with the abatement and control of the groundwater level in a single stage. Replacement of the vertical drainage (wellpoint) with a horizontal drainage in the final stage of the excavation. The horizontal drainage pipes, placed in a vacuum by the self-priming pump, intercept and remove the filtered water under the bulkhead.

Wellpoint eductor system operation

Operating principles of the wellpoint-eductor system, used in cases where pumping is required when the gap between the axis of the pump suction inlet and the dynamic level of the groundwater exceed the value of 6.0 m. The “wellpoint eductor” system is based on the circulation of pressurised water through ejectors which, by accelerating the flow speed, determine a vacuum (Venturi effect) and a suction capacity achievable at considerable depths.