[H-TT26] [JJ] Near Surface Geophysics

Wed. May 24, 2017 1:45 PM - 3:15 PM 105 (International Conference Hall 1F)

convener:Kyosuke Onishi(Public Works Research Institute), Toru Takahashi(Fukada Geological Institute), Kunio Aoike(Oyo corporation), Keisuke Inoue(国立研究開発法人　農業・食品産業技術総合研究機構), Chairperson:Toru Takahashi(Fukada Geological Institute), Chairperson:Kunio Aoike(Oyo corporation), Chairperson:Keisuke Inoue(国立研究開発法人　農業・食品産業技術総合研究機構)

The new session of near surface geophysics calls many research contributions on geophysical exploration techniques for the near surface. Our target depth is strictly restricted in the depth zone from 5 cm to 30 m (or from 2 in to 100 ft) below the surface of the ground. It may be the closest unknown territory for human society and advanced societies cannot have controlled yet to avoid disasters caused by dynamics in the shallow near surface. Peoples require techniques to manage levee, landslide and earth constructions and also knowledge to control groundwater, liquefaction and soil pollution. The near surface has many geotechnical, environmental and hydrogeologic problems.

Major survey techniques are surface wave method, electric exploration, ground-penetrating radar and land streamer, but any methods will be discussed if your target is located in the specified depths. This session welcomes to discuss laboratory tests and rock physics for unconsolidated porous media in the vadose zone. Also, we will welcome not only cutting-edge technologies but also classic theory, if the knowledge is useful for human living.

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1:45 PM - 2:00 PM

[HTT26-01] Delineation of S-wave velocity structure of pavements and embankments by means of high-frequency surface wave measurements

*Tomio INAZAKI¹, Hiroshi Kisanuki¹, Koichi Hayashi², Sugio Imamura³, Takaho Kita⁴ (1.Public Works Research Institute, Tsukuba Central Institute, 2.OYO USA, 3.CTGK, 4.TK Ocean-Land Investigations Ltd.)

2:00 PM - 2:15 PM

[HTT26-02] Development of a method to estimate one-dimensional distribution of dielectric constant using electromagnetic waves

*Akira Furukawa¹, Kanta Takagi¹, Sohichi Hirose¹, Yoshiaki Yamanaka², Hiroshi Imai² (1.Tokyo Institute of Technology, 2.SUNCOH CONSULTANTS CO., Ltd.)

2:15 PM - 2:30 PM

[HTT26-03] Processing of ground penetrating radar (GPR) data for underground cavity by Convolution neural network

*Shinichiro Iso¹, Akira Saito¹, Kyosuke Onishi², Toshifumi Matsuoka³, Yukio Tobe⁴, Toru Takahashi³ (1.Graduate School of Creative Science and Engineering Dept. of Resources and Environmental Engineering, 2.Public Works Resarch Institute, 3.Fukada Geological Institute, 4.Geofive Co., Ltd.)

2:30 PM - 2:45 PM

[HTT26-04] Detailed GPR survey for delineating boulders buried in a roadbed of a highway under construction

*Kunio Aoike¹, Hiroshi Kisanuki², Takanori Ogahara², Tomio Inazaki² (1.Oyo corporation, 2.Public Works Research Institute)

2:45 PM - 3:00 PM

[HTT26-05] Evaluation of groundwater in fractures adjacent to tunnel using information of waveforms of Ground Penetrating Radar

*Kazuhiko Masumoto¹ (1.Kajima Corporation)

3:00 PM - 3:15 PM

[HTT26-06] Resistivity monitoring of water-leaking paddy field filled with water

*Keisuke Inoue¹, Kosuke Wakasugi¹, Yasuyuki Wakiyama¹, Ryosuke Nomiyama¹, Seiji Tanaka² (1.National Agriculture and Food Research Organization, 2.Kumamoto Prefectural Agricultural Research Center)

Session information