Hydraulic and earth engineering – Foundation – Columnar structure
Patent
1986-10-24
1987-11-24
Taylor, Dennis L.
Hydraulic and earth engineering
Foundation
Columnar structure
405233, 405237, E02D 556
Patent
active
047085290
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method in pile-installation operations, in which there is placed in the ground a pipe or corresponding element through which a flowing and solidifiable substance is passed, so as to assist in supporting a pile when solidified.
Methods are known to the art in which a pipe is inserted into the ground and in which cement or like solidifiable substance is passed to a cavity located at the lower end of the pipe and forced out into the surrounding ground, by means of a plunger operating in the pipe. These methods can be applied satisfactorily with readily flowing substances such as cement, but not with concrete. When subjected to pressure, readily flowing substances, however, have the tendency to seek and enter channels and cavities present in the ground and consequently the substance does not collect into a unitary mass suitable for supporting the pile.
Methods are also known in which a pipe is inserted into the ground together with devices with which a cavity is dug or otherwise formed in the proximity of the lower end of the pipe, and subsequently filled with cement or corresponding solidifiable substance. Such methods are encumbered with serious disadvantages, such as the high costs involved, the excessive time required to complete a pile-installing operation, and the problems created with regard to the transportation of excavated material to the surface of the ground.
The present invention relates to a method which can be carried out both quickly and readily at low costs, and which is suited to the use of concrete. Among other things, because of its simplicity the method is not encumbered to any great extent with technical problems of the kind encountered with known methods. The method also enables concrete to be caused to penetrate into and/or displace the surrounding earth, so as to provide an anchorage for a pile.
The invention thus relates to a method which can be applied in pile-installing operations, and in which there is inserted into the ground a pipe or corresponding conduit through which a flowing and solidifiable substance is passed, so as to support a pile when the material solidifies; and in which method pressure is exerted on the solidifiable substance so as to cause said substance to penetrate into and/or displace the surrounding earth, in a manner to form an anchorage for a pile
The method is mainly characterized by creating a cavity in the proximity of and at least partially beneath the lower orifice of the pipe, which constitutes an outer pipe; by applying pressure to a solidifiable substance of the aforesaid kind, preferably concrete, present in the cavity with the aid of a raisable and lowerable body which protrudes into the cavity and which passes beneath the bottom orifice of the outer pipe during a given part of the time over which said pressure is applied, and which when said pressure is applied is caused to move downwards by means of a downwardly acting force, in order to displace the solidifiable substance present in the cavity.
The invention also relates to an arrangement for use in pile-installing operations, this arrangement comprising a pipe or corresponding element which is intended to be inserted into the ground and through which a flowable and solidifiable substance is intended to be passed, so as to assist in supporting a pile when solidified, and which arrangement further comprises means for generating pressure such as to cause the solidifiable substance to penetrate into the surrounding earth and/or to displace said substance so as to form an anchorage for the pile.
The arrangement is mainly characterized in that there is provided a raisable and lowerable body by means of which the aforesaid solidfiable substance, preferably concrete, present in a cavity created in the vicinity of and at least partially beneath the bottom orifice of the pipe, which constitutes an outer pipe, is placed under pressure, said body, for at least a part of the pressure period over which said pressure is applied, being intended to protrude beneath the bottom or
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patent: 2952131 (1960-09-01), Lyroudias
patent: 3005315 (1961-10-01), Cobi
patent: 3164963 (1965-01-01), Talley et al.
patent: 3206935 (1965-09-01), Phares
patent: 3344611 (1967-10-01), Philo
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