Method of improving ground of large area

Details Method of improving ground of large area Method of improving ground of large area

1991-08-06

1992-06-23

Reese, Randolph A.

Hydraulic and earth engineering

Foundation

Columnar structure

405269, 405267, 405240, E02D 530

Patent

active

051237822

ABSTRACT:
The present invention relates to a method for improving the ground of a large area. The method comprises the steps of inserting a pipe into a hole previously dug in the ground, injecting a high pressure liquid and a ground improving injection liquid from an injecting apparatus attached to the tip of the pipe, drawing up the pipe, grouting the ground, and injecting the ground improving injection liquid to thereby form an underground columnar consolidation body for improving the ground. The drawing-up operation of the pipe is executed while applying vertical vibration to the pipe. Thus, a consolidation body of a large area for improvement of the ground is obtained without concave and convex portions.

REFERENCES:
patent: 3786641 (1974-01-01), Turzillo
patent: 4043830 (1977-08-01), Suzuki
patent: 4084648 (1978-04-01), Yahiro et al.
patent: 4449856 (1984-05-01), Tokoro et al.
patent: 4624606 (1986-11-01), Nakanishi et al.
patent: 4630972 (1986-12-01), Kinnan
patent: 4732510 (1988-03-01), Louis
patent: 4786212 (1988-11-01), Bauer et al.

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