STRENGTH MEASURING METHOD OF GROUND AT THE PRESENT POSITION

Japanese Patent JP3966769

B2

PROBLEM TO BE SOLVED: To provide a strength measuring method of the ground at the present position, in which the ground strength at the present position can be efficiently measured by SST by grasping the correlation between CPT (cone penetration test) and the SST (Swedish sound test) to improve the work efficiency.
SOLUTION: CPT and SST are performed at points near a ground G to be measured, respectively. Data of depth in which a measured value of tip resistance qt when a cone 2 passes through in the CPT is abruptly changed are not adopted. In rotary passing through section of SST, a value of tip resistance qt when the cone 2 passes through which is obtained by CPT is made to correspond to the number of half rotation NSW obtained in SST by obtaining a mean value of upper 25 cm parts from depth of a tip of the cone 2 to obtain its correlation. Converted tip resistance is obtained from data of the performed SST and the correlation with the CPT which is obtained already.

JPS543317	MACHINE OF INVESTIGATING QUALITY OF SEA BOTTOM
JP7120825	Ground strength estimation method and system

Takao Kishida
Yoshio Mitarai
Nobuyuki Yamane
Nakamura Akinori

JP2002171189A

August 29, 2007

June 12, 2002

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Toa Construction Industry Co., Ltd.

E02D1/02; G01N3/40; (IPC1-7): E02D1/02; G01N3/40

JP11193522A
JP2002054128A
JP9053224A

三村 衛 外1名,コーン貫入試験による砂質地盤の液状化強度評価,土と基礎,地盤工学会,1999年 9月,Vo.47 No.9,P21~24
村石 尚 外4名,簡易貫入試験機とスエーデン式サウンディングの土質別相関,第25回土質工学研究発表会,土質工学会,1990年 6月,第25回,P.149~150

Shinichi Ogawa
Takashi Noguchi
Kazuhiko Saishita

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