地盤改良効果の確認方法及びそれに用いる測定装置

Japanese Patent JP7248241

B2

To provide a method and a measuring device for confirming the effect of ground improvement that reduces variation, enables direct confirmation of the quality of improved ground, eliminates the risk that a measurement probe cannot be recovered in the electrical logging, and ensures that electrodes are in contact with the hole wall.SOLUTION: After the ground improvement, a depth distribution map of the Nd value was obtained by a small dynamic cone penetration test, and the primary effect was confirmed to confirm the ground improvement effect. When the ground improvement effect is not recognized by the above primary effect confirmation, a measurement probe 2 equipped with an electrode is inserted into a penetration hole 1 of the small dynamic cone penetration test, and a depth distribution map of the specific resistance is obtained by an electrical logging for measuring the specific resistance. A secondary effect is confirmed to confirm the ground improvement effect from the amount of resistivity reduction before and after the ground improvement. In the electrical logging, when a hollow outer sleeve is detachably inserted into the measurement probe 2 and it becomes difficult to pull it out from the penetration hole 1, the measurement probe 2 can be removed from the outer sleeve and recovered.SELECTED DRAWING: Figure 1

Mitsuhiro Akatsuka
Kenji Shimosaka
Yoshinobu Murata
Ohno Yasutoshi
Takayoshi Ito

JP2019118064A

March 29, 2023

June 26, 2019

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Toda Construction Co., Ltd.
NPO corporation ground disaster prevention network
Taiyo Foundation Industries Co., Ltd.

E02D3/12; E02D1/08

JP63315978A
JP8145926A
JP2009024493A
JP2001241031A
JP8041860A
JP2019077992A

Hisashi Izumi

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