Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,...
Patent
1991-06-28
1993-03-16
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
405154, 405283, E02D 1100, E02D 502
Patent
active
051939380
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a method and an apparatus for laying pipe for a pipeline such as a sewer pipeline under the ground, and more particularly, to a method and an apparatus for laying pipe such as a box culvert by an open cut method.
BACKGROUND ART
One pipe laying apparatus used as an earth-retaining or sheathing apparatus for open cut works includes an approximately box-type frame in the whole form. This known apparatus involves a pair of side plates facing each other at a horizontal interval; a supporting frame attached to the side plates; and a plurality of jacks for advancing the supporting frame. In this known apparatus, earth pressure is received by the side plates, and a reaction force is received by a pipe which has been already placed within a channel (designated as a "pipe already installed" hereafter).
This known apparatus is advanced in the channel formed in the ground, while the channel is extended by a known machine, such as a back hoe. After the channel is extended by a required length, a new pipe is placed within the channel and connected to the pipe already installed. Specifically, an excavation and advance operation for excavating the ground while advancing the laying apparatus and a placement and connection operation for placing a new pipe in the channel and connecting the new pipe to the pipe already installed are performed alternately.
This known laying apparatus and methods for laying a pipe thereby, however, are based on loading the reaction force generated in advancing the apparatus on the pipe already installed. The excavation and advance operation is therefore not performed simultaneously with the placement and connection operation. A buffer material for preventing breakage of the end surfaces of the pipe already installed should be placed between the pipe already installed and the jack when the prior art apparatus is used. Further, a large-sized jack having a stroke larger than the length of the pipe to be installed should be used with this prior art device.
SUMMARY OF THE INVENTION
An object of the present invention is to provide apparatus for laying a pipe, in which the excavation of the ground and the advance operation of the apparatus are performed simultaneously with the placement and connection operation of a new pipe.
A method for laying a pipe according to the present invention comprises the steps of alternately performing a first process causing a first frame assembly disposed in a channel formed in the ground to advance in relation to a second frame assembly disposed within the channel and at the rear of the first frame assembly, while loading a reaction force acting on the second frame assembly on the ground; and performing a second process causing the second frame assembly to advance toward the first frame assembly, while loading a reaction force acting on the first frame assembly on the ground, the first frame assembly being provided with a pair of first plate-like earth-retaining means placed to face each other at a horizontal interval, and the second frame assembly being provided with a pair of second plate-like earth-retaining means placed to face each other at a horizontal interval; excavating earth and sand in front of the first frame assembly to extend the channel while alternately performing the first and second processes; and disposing a pipe in an excavated location.
An apparatus for laying a pipe according to the present invention includes a first frame assembly provided with a pair of first plate-like earth-retaining means placed to face each other at a horizontal interval and first connecting means for interconnecting both first earth-retaining means; a second frame assembly placed at the rear of the first frame assembly and provided with a pair of plate-like second earth-retaining means placed to face each other at a horizontal interval and second connecting means for interconnecting both second earth-returning means; drive means for relatively moving the first and second frame assemblies in forward and rearward directions; fi
REFERENCES:
patent: 3543522 (1970-12-01), Torti
patent: 3750409 (1973-08-01), Orfei
patent: 3967454 (1976-07-01), Barnes
patent: 4060992 (1977-12-01), Heitkamp et al.
patent: 4588329 (1986-03-01), Gilchrist
patent: 4695204 (1987-09-01), Bell
Kabushiki Kaisha Iseki Kaihatsu Koki
Ricci John
Taylor Dennis L.
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