Hydraulic and earth engineering – Subterranean waste disposal – containment – or treatment – With treatment of waste
Patent
1988-10-07
1990-08-07
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean waste disposal, containment, or treatment
With treatment of waste
166369, E21B 4500
Patent
active
049463128
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The apparatus of the present invention can be employed wherever garbage dumping ground dumps, old deposit or dump site burdens and contaminated soils are to be degasified, purified, sanitized, rehabilitated or checked.
In addition, the present invention relates to an apparatus for opening up garbage dumping ground gas sources and for the exploration and sanitization or rehabilitation of old deposit site burdens and contaminated soils with, by way of example, a hollow cylindrical probe which is insertable into the gassy zone of the dump and which is provided with lateral wall perforations serving as gas inlet apertures, as well as with a gas evacuation duct.
In hitherto known apparatuses of this kind, the probe consisted of a pipe, such as a plastic pipe, which, in the section intended to penetrate into the gassy zone, was provided with wall perforations and which served at the same time as a gas evacuation line. In order to introduce such a probe into the dump, a shaft was first sunk into the latter by means of excavation or by drilling into the dump material, into which the probe was inserted, whereupon the interspaces between the shaft and the probe in the gassy zone were filled with a gaspervious dumped packing of pebbles and, thereabove, with material having a greater density. Sinking the shaft was possible only with a concomitant substantial disturbance of the structure of the dormant dump material. Moreover, clogging of the probes with mud and solids was impossible to eliminate. Further, is was not possible to check the level of water that had infiltrated into the probe, nor could the same be removed by pumping it up.
By means of the present invention it is intended to develop further an apparatus of the type stated in such a way that it can be inserted into the dump material while causing as little disturbance as possible to the dump material and, at the same time, while forming therein a cavity which is suitable to serve as a gas collecting the control chamber. At the same time, the probe is intended to be constructed as a main element of a system for the exploration and sanitization of old deposit or dump site burdens or of contaminated soils.
SUMMARY OF THE INVENTION
In order to solve this technical problem, in an apparatus for opening up gas sources of garbage dumping grounds and for the exploration and sanitization of old deposit site, burdens and of contaminated soils, a hollow cylindrical probe is provided which can be inserted into the gassy zone of the dump and which has casing wall perforations serving as gas inlet apertures as well as a gas evacuation duct. Provision is also made for the apparatus to be fitted with a rigid probe body in the form of a hollow cylindrical steel container that is to be pile-driven into the dump or ground surface, the casing wall of which is provided with the wall perforations and the diameter of which is larger than that of the gas evacuation duct coaxially and detachably connected therewith.
An apparatus as proposed by the present invention can be inserted into the dormant dump material by means of pile-driving, i.e. without any excavation operations. This material is, in places, more or less compressed thereby, it is true; however, this compression is very largely nullified again by the ripping projections and, thereby, its structure in the vicinity of the pile-driving site, is impaired only relatively little. The hollow cylindrical steel container forming the probe body, the casing wall of which is provided with the wall perforations serving as gas inlet apertures, forms with its interior, subsequent to having been pile-driven into the dump, a cavity within the dump which is essentially sealed against the outer atmosphere and and which is suitable on the one hand, as a gas collecting chamber and, on the other, as a control chamber accessible via the gas evacuation duct. The shaft-like space remaining adjacent to the gas evacuation duct following the pile-driving operation is relatively narrow and can be filled with dense soi
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Swiss Journal, "Gas-Wasser-Abwasser", No. 10, 1984, pp. 651-655.
German Journal, "Mull und Abfall", 1/1982, pp. 16-20.
Jebens Claus
Loock Rudolf
Holsteiner Gas-Gesellschaft mbH
Ricci John A.
Taylor Dennis L.
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