Ramming well
A ramming well (impact well) is a well that is created when a pipe is rammed into the ground; it is a well for small water wells . It is used in individual country houses, settler farms and other small consumers, as well as for watering gardens and for supplying water to grazing animals . The soil must have a water-bearing, rolling, loose rock layer.
The ramming well is only partially suitable for producing drinking water .
As a groundwater measuring point for shallow depths and as a water sampling point , it is conditionally not applicable to determine hydraulic parameters .
Layout and function
The ramming well consists of a steel tube (3) which is provided at its lower end with a ramming tip (1) and a ramming well filter with slots or holes (2). It is driven into the ground by ramming or hammering down to the water-bearing layer . At the upper end of the steel pipes there is a pipe (4) above the ground with a connecting piece for a hand pump or electric centrifugal pump for drawing water.
In order to increase the resistance of layers that are particularly difficult to penetrate, the ramming well filter is provided with an inner braid made of brass fabric or a slotted protective plastic jacket; the ram tip is protected from destruction by a 6 mm thick hard plastic coating made of polyethylene.
operation area
The depth to which the filter pipes can be driven depends on the nature ( type of soil ) of the layers to be penetrated. In medium-sized sands with no stone deposits, the filters can be driven in to 6 m below the surface without any particular difficulty. If fat, loamy top layers or very fine sand or gravel layers interspersed with debris are to be penetrated, this depth can hardly be reached. However, if there is enough water, the depth is not important. A prerequisite for the extraction of groundwater with ram filters is always the presence of a rich, water-bearing layer with a groundwater level that never falls below the suction height of the pump, i.e. practically no lower than about 7 m below the pump, even when pumping.
Other aspects
The filter tube, which is provided with slots or holes, becomes clogged with fine sediments over the course of time , which limits the delivery rate (mean and instantaneous volume flow ) and the service life of the ramming well. Due to the clogging of the pipes and the withdrawal of water from shallow depths, the hygienic safety of piling wells according to current and local criteria is not given. They are therefore only used in this country for industrial water but not for drinking water.
The components for a ramming well are also offered in hardware stores. Such a kit consists, for example, of the following individual parts:
7 × 1 m long R 1 1/4 "pipes, 1 ram filter with internal twist, 8 construction sleeves, 1 non-return valve with double ventilation, 1 hammer.
Ramming wells must be reported to the responsible authorities or offices, depending on the local law. In Germany, wells must be reported to the Lower Water Authority, in Austria use for personal use does not require a permit and in Switzerland the shelf right ( water shelf ) applies , the Office for Water and Waste is responsible.
Designations
Rammbrunnen is the official name for such a well according to the technical standards committee for well construction in the German standards committee .
Other names for the ramming well are:
- Blow well
- according to the type of introduction of the pipes.
- Abyssinian fountain
- because they were used on a larger scale in the British campaign against Abyssinia in 1868 to supply the troops with drinking water.
Web links
Individual evidence
- ↑ https://www.gartenhaus-gmbh.de/magazin/brunnen-anlegen-im-garten/ Fa. AZ GartenHaus GmbH to create fountains in the garden , accessed on March 4, 2018