Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1979-02-22
1981-07-21
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
37189, 405282, E21D 700
Patent
active
042795486
ABSTRACT:
An apparatus and a method for excavating and pile reinforcing trenches which requires the removal of, and access to, no more top soil than is defined by the actual dimensions of the ditch. A box-like central structure serves as a frame within which excavation by customary means, e.g., externally positioned hoes, takes place. The outside walls of said central structure form temporary trench walls supporting the surrounding dirt. The inside walls of said central structure form a rear section, narrower in width than the front section and set off therefrom in a step-like fashion, behind which flat piling is driven in before the entire unit advances. Advancement is carried out by means of lateral anchoring base and a longitudinal propulsion mechanism both riding on a trolley structure extending from the rear of the box frame and alternatively expanding and contracting periodically. In addition, vertical shafts with cutting teeth are disposed within the front edges of the box frame walls to facilitate tunneling forward during the propulsion cycle.
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Ostfeld David M.
Taylor Dennis L.
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