Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1986-08-07
1989-05-23
Corbin, David H.
Hydraulic and earth engineering
Earth treatment or control
Chemical
405117, 405241, 405262, 405271, E02D 302, E02D 312
Patent
active
048325350
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns a process for:
1. Soil treatment, either by reinforcement grouting--compaction, or decompaction--drainage, or a combination of these two actions.
2. Linear works construction inside the ground with compaction or decompaction of the surrounding soil.
3. Plane works construction inside the ground, said plane works consisting of either reinforced--grouted--compacted soil, or decompacted--drained soil, or a combination of these two types of treated soils.
A linear work inside the ground, means any civil work constructed inside the ground, realized either from the ground level or from the sides or the bottom of an excavation, and for which one dimension, in the downwards direction, is substantially greater than its dimensions in the two other perpendicular directions.
A plane work inside the ground means any work involving a continuous or integral mass of soil which forms a volume having one dimension smaller than its two other dimensions.
FIELD OF THE INVENTION
The invention is particularly suitable for use in the field of soil treatments, either for structures foundation on the treated soils, or for improving soil stability or soil imperviousness, and in the field of construction of linear works inside a ground which has to be ameliorated structurally by compaction, or decompaction. Such linear works are for example piles, micropiles, drains, water wells, anchors, special tubes for grouting, measuring equipments such as piezometers, inclinometers, measuring cells, etc... A linear work may, or may not, include metallic elements, and may, or may not, be surrounded with build-up materials. The invention is also suitable for plane work constructions inside the ground, such as for example constructions involving the treatment of excavation sides and bottoms necessary to perform said plane works construction, supporting walls formed with compacted, grouted and reinforced soil, watertightness walls and ground draining walls, or combination of the above mentioned constructions for obtaining twin-layer, multi-layer or composite walls, impervious, draining or composite (twin-layer or multi-layer) rafts, etc...
With the process of the invention it is possible to obtain by use of a single tool, lowered only once into the ground, either a mechanically compacted, grout treated and reinforced soil, or a decompacted soil equipped with drains, or a unit linear work surrounded by compacted or decompacted soil.
STATE OF THE ART
Numerous methods or processes for mechanical compaction, grout treatment and introduction of equipments inside the grounds in order to modify mechanical and/or watertightness soil characteristics are already known. Many processes for drainage and installation of piles, anchors and measuring equipments inside the ground, at different depths, are also already known by the man skilled in the art.
Generally, the known processes are directed either to soil treatment per se, usually consisting of compaction or grouting, or to installation of an equipment within the soil, the installation being for example followed by treatment of the surrounding soil, for example by grouting.
The existing processes do not permit simultaneous realisation of all the desirable or useful operations, necessary for installation of the equipment inside the ground and for the compaction and/or treatment of the surrounding soil. On the contrary the existing processes need, either to perform two successive operations, in order to obtain the required result (e.g. installation of micropiles, then soil grouting around their lower part in order to obtain the anchoring zone), or to be limited to only one operation (e.g. single soil compaction, without introduction of reinforcements).
SUMMARY OF THE INVENTION
It is an object of the invention to provide an improved process or method which allows, with a single or sole tool and in a single in-out operation of introduction and withdrawal of the tool from a soil, to perform the set of following operations:
1. Drilling the soil.
REFERENCES:
patent: 3228153 (1966-01-01), Luedloff
patent: 3512366 (1970-05-01), Turzillo
patent: 4036026 (1977-07-01), Assayama
patent: 4044513 (1977-08-01), Deike
patent: 4079592 (1978-03-01), Eakin
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