Takenaka Komuten Co., Ltd.

Hiroyuki Kuroiwa

Atsushi Takagi

Tateo Kawamura

Masao Miyaguchi

Mitsuo Miura

Teruo Mizuhata

Takefumi Ito

Yoshihiro Ishikawa

Sludge deposit is stored in a sludge deposit receiving hopper, and the stored sludge deposit is fed onto a belt conveyor and transferred to a mixer. A hardener is fed to this mixer from a hardener hopper. A conveyor belt is disposed on the belt conveyor to measure the quantity of the sludge deposit transferred by the belt conveyor. According to this measured value of the transferred sludge deposit, the quantity of the sludge deposit fed from the sludge deposit receiving hopper and the quantity of the hardener fed from the hardener hopper are controlled. The sludge deposit is mixed and kneaded with the hardener, and the sludge deposit is solidified.

Apparatus for treatment of sludge deposit

A method for constructing a tubular pile foundation in soft soil formations comprises agitating the soft soil to form an agitated region like a tube with single annular section or tubes with conjugated annular section at a time, injecting chemical hardener and mixing it with the soft soil to solidify the agitated region in situ into a tubular pile or conjugated tubular piles. By repeating the foregoing steps, the structural wall of piles is constructed to provide bearing capacity with the soft soil formations.

Method for constructing a reliable foundation in soft soil formations

The present invention relates to a device for constructing a tubular pile foundation in soft soil formations. Where in use, the device is suspended into the soft soil from a crane or a derrick on the earth or a working barge off shore. The device for stabilizing a body of the soft soil comprises a machine box holding driving means, driving shaft means connected to said drive means, agitating barrel means for stirring the soft soil disposed at the lower end of said driving shaft means, said agitating barrel means having a plurality of agitating blades, and a chemical hardener feeder system for injecting the hardener into the soft soil to form solidified tubular piles, said chemical hardener feeder system including swivel joints, delivery pipes and injection nozzles. The device can be moved upward and downward in course of constructing tubular solid piles in situ by agitating and mixing the soil with the hardener to provide the high bearing capacity to the soil layers.

Device for constructing a foundation in soft soil formations

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Tokyo, Japan

Hiroyuki Kuroiwa