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Case study of geostructural prospect of a tunnel by using geophysical methods; Butsuri tansa ni yoru tunnel chisan yosoku to jissai

Abstract

A preliminary survey was carried out by combining elastic wave exploration (using a refraction method) and electrical exploration (using a resistivity imaging method) on a long tunnel planned in a granite distributed area. This paper describes a case of verifying geological condition in the area by using a trial survey well and horizontal boring. This tunnel goes through the Seburi mountainous area on the border of Fukuoka Prefecture and Saga Prefecture for a total distance of 12 km. The refraction method and the resistivity imaging method were selected from the necessity of identifying the weathering condition in natural ground, and distributions of fault crush zones and underground water in a section extending 560 m from the well entrance. As a result of comparing the natural ground condition interpreted from the geophysical survey results with the construction records, the fault was detected as a cracked or deformed section in the part where the resistivity value changes abruptly or where the resistivity is low. The tunnel natural ground classification showed a good correspondence with the elastic wave velocities. The largest flooding section showed a good agreement with the section where the resistivity changes suddenly to a lateral direction. Thus, the geological information  More>>
Authors:
Ueda, H; [1]  Kawakami, J; [2]  Nagasue, I; Hiwatashi, S; Wakuno, M [3] 
  1. Japan Railway Construction Public Corp., Tokyo (Japan)
  2. Taisei Construction Corp., Tokyo (Japan)
  3. Oyo Corp., Tokyo (Japan)
Publication Date:
May 27, 1997
Product Type:
Conference
Report Number:
CONF-9705167-
Reference Number:
SCA: 150301; 422000; PA: NEDO-97:912289; EDB-97:116185; SN: 97001846581
Resource Relation:
Conference: 96. SEGJ conference, Butsuri tansa gakkai dai 96 kai (1997 nendo shunki) gakujutsu koenkai, Tokyo (Japan), 27-29 May 1997; Other Information: PBD: 27 May 1997; Related Information: Is Part Of Proceeding of the 96th (spring, fiscal 1997) SEGJ Conference; PB: 502 p.; Butsuri tansa gakkai dai 96 kai (1997 nendo shunki) gakujutsu koenkai koen ronbunshu
Subject:
15 GEOTHERMAL ENERGY; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; GEOPHYSICAL SURVEYS; TUNNELS; SEISMIC SURVEYS; RESISTIVITY SURVEYS; GEOLOGIC STRUCTURES; DIRECTIONAL DRILLING; AQUIFERS; GROUND WATER; GEOLOGIC FRACTURES; GEOLOGIC FAULTS
OSTI ID:
522689
Research Organizations:
Society of Exploration Geophysicists of Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97770262; TRN: 97:912289
Availability:
Available from The Society of Exploration Geophysicists of Japan, 2-18, Nakamagome 2-chome, Ota-ku, Tokyo, Japan; OSTI as DE97770262
Submitting Site:
NEDO
Size:
pp. 420-424
Announcement Date:

Citation Formats

Ueda, H, Kawakami, J, Nagasue, I, Hiwatashi, S, and Wakuno, M. Case study of geostructural prospect of a tunnel by using geophysical methods; Butsuri tansa ni yoru tunnel chisan yosoku to jissai. Japan: N. p., 1997. Web.
Ueda, H, Kawakami, J, Nagasue, I, Hiwatashi, S, & Wakuno, M. Case study of geostructural prospect of a tunnel by using geophysical methods; Butsuri tansa ni yoru tunnel chisan yosoku to jissai. Japan.
Ueda, H, Kawakami, J, Nagasue, I, Hiwatashi, S, and Wakuno, M. 1997. "Case study of geostructural prospect of a tunnel by using geophysical methods; Butsuri tansa ni yoru tunnel chisan yosoku to jissai." Japan.
@misc{etde_522689,
title = {Case study of geostructural prospect of a tunnel by using geophysical methods; Butsuri tansa ni yoru tunnel chisan yosoku to jissai}
author = {Ueda, H, Kawakami, J, Nagasue, I, Hiwatashi, S, and Wakuno, M}
abstractNote = {A preliminary survey was carried out by combining elastic wave exploration (using a refraction method) and electrical exploration (using a resistivity imaging method) on a long tunnel planned in a granite distributed area. This paper describes a case of verifying geological condition in the area by using a trial survey well and horizontal boring. This tunnel goes through the Seburi mountainous area on the border of Fukuoka Prefecture and Saga Prefecture for a total distance of 12 km. The refraction method and the resistivity imaging method were selected from the necessity of identifying the weathering condition in natural ground, and distributions of fault crush zones and underground water in a section extending 560 m from the well entrance. As a result of comparing the natural ground condition interpreted from the geophysical survey results with the construction records, the fault was detected as a cracked or deformed section in the part where the resistivity value changes abruptly or where the resistivity is low. The tunnel natural ground classification showed a good correspondence with the elastic wave velocities. The largest flooding section showed a good agreement with the section where the resistivity changes suddenly to a lateral direction. Thus, the geological information interpreted from both surveys presented a good correspondence with the construction records, leading to a judgment that the prediction is possible. 3 refs., 4 figs., 5 tabs.}
place = {Japan}
year = {1997}
month = {May}
}