Hydraulic and earth engineering – Foundation – Columnar structure
Patent
1991-08-30
1992-08-25
Reese, Randolph A.
Hydraulic and earth engineering
Foundation
Columnar structure
405233, 405267, 405269, E02D 1502, E02D 518
Patent
active
051413647
ABSTRACT:
Method for producing a narrow or slit wall (42) in soil (22) by means of a driver (10) with at least two and preferably three vibrating tubes (I, II, III) and guide blades (28, 30, 32) between the vibrating tubes. Following penetration of the driver into the soil, during the withdrawal process of the latter, injection material (40, 44) is loaded into the drilled cavities. During the next work step, the driver is lowered into the soil so that the rearmost vibrating tube (I) is lowered into the still-soft injection material (40) which was added during the previous withdrawal of the foremost vibrating tube (III). By monitoring the power draw of the vibrating motor on the rearmost vibrating tube (I) and regulating this power draw to keep it to a minimum value, removal of the rearmost vibrating tube from the still-soft injection material (40) is prevented. As a result the seal between the successive sections of narrow wall (42) is ensured. Continuous abutting of the paths (40, 44) produced by the individual vibrating tubes ensures the tightness of each wall section.
REFERENCES:
patent: 1665798 (1928-04-01), Sipe
patent: 4906142 (1990-03-01), Taki et al.
Degen Alexander
Degen Wilhelm S.
Olsen Arlen L.
Reese Randolph A.
Vibroflotation AG
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