Title:
改良地盤の改良効果の評価方法
Document Type and Number:
Japanese Patent JP7012290
Kind Code:
B2
Abstract:
To provide an evaluation method of improvement effect of an improved ground which can evaluate strength and rigidity of an improved ground on a bearing ground simply in a short time, in a ground improvement construction.SOLUTION: In a strength evaluation method of an improved ground on a bearing ground 1, a plurality of sets of simultaneous microtremor observations of a reference point P at which depth to the bearing ground 1 is known and an observation point having an interval to the reference point P are carried out at the same observation position on a ground surface before and after ground improvement. From microtremor wave form by the microtremor observation, a Fourier spectrum ratio from the reference point P in each observation set is calculated. Peak cycle difference observed in the Fourier spectrum ratio before and after ground improvement is acquired. Based on a result of numerical analysis separately performed, strength and rigidity of the improved ground are evaluated from the peak cycle difference before and after ground improvement.SELECTED DRAWING: Figure 1
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Inventors:
Kimitoshi Sakai
Kohei Tanaka
Go Araki
Morikawa Hitoshi
Kaori Iiyama
Kohei Tanaka
Go Araki
Morikawa Hitoshi
Kaori Iiyama
Application Number:
JP2019003218A
Publication Date:
January 28, 2022
Filing Date:
January 11, 2019
Export Citation:
Assignee:
Railway Technical Research Institute
National University Corporation Tokyo Institute of Technology
Light Industry Co., Ltd.
National University Corporation Tokyo Institute of Technology
Light Industry Co., Ltd.
International Classes:
E02D1/00; E02D1/08
Domestic Patent References:
| JP2018178618A | ||||
| JP6102357A | ||||
| JP200746408A | ||||
| JP200785137A |
Attorney, Agent or Firm:
Patent Business Corporation Intect International Patent Office
Yoshinori Ishibashi
Yoshinori Ishibashi