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Study of evaluation for grouting effect in a borehole; Yakueki chunyu koka hyoka gijutsu ni okeru ichikosatsu

Abstract

For the foundation improvement works by grouting in a borehole, evaluation of grouting effect is one of the most important management items. The grouting design and works are sometimes reconsidered depending on the evaluation of grouting effect during the test injection. The purpose of the evaluation of grouting effect is to grasp the range of improvement and consolidation after the injection, and to judge and estimate the strength and permeability of the consolidation part. This paper describes the judgment method of the strength using PS logging results and borehole televiewer (BHTV) logging results. The reflection intensity (Ir) by the BHTV logging increased after the grouting, which showed a same tendency as that using S-wave and P-wave velocities (Vs and Vp) before and after the grouting. This was considered to demonstrate the grouting effect. A relation was obtained between the Vs, Vp and Ir before and after the grouting, which was expressed by following equation. Ir=0.143{times}Vs-70=0.093{times}Vp-110. The relation with the dynamic elastic coefficient (Ed) was also obtained as follow; Ir=0.0013{times}Ed. 9 figs.
Authors:
Nakamura, H; Matsuo, T; [1]  Yamauchi, Y; Imanishi, H [2] 
  1. Fukuoka Municipal Transportation Bureau, Fukuoka (Japan)
  2. Osaka Soil Test, Osaka (Japan)
Publication Date:
Oct 01, 1996
Product Type:
Conference
Report Number:
CONF-9610294-
Reference Number:
SCA: 422000; 150301; PA: NEDO-96:914760; EDB-97:074921; SN: 97001782512
Resource Relation:
Conference: 95. SEGJ conference, Butsuri tansa gakkai dai 95 kai (1996 nendo shuki) gakujutsu koenkai, Kyoto (Japan), 21-23 Oct 1996; Other Information: PBD: Oct 1996; Related Information: Is Part Of Proceedings of the 95th SEGJ Conference; PB: 344 p.; Butsuri tansa gakkai dai 95 kai (1996 nendo shuki) gakujutsu koenkai koen ronbunshu
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 15 GEOTHERMAL ENERGY; SOILS; LAND RECLAMATION; GROUTING; SOLIDIFICATION; BOREHOLES; REMOTE VIEWING EQUIPMENT; SOIL MECHANICS; PERMEABILITY; SP LOGGING; RESISTIVITY LOGGING; REFLECTION; SEISMIC S WAVES; SEISMIC P WAVES; YOUNG MODULUS
OSTI ID:
472654
Research Organizations:
Society of Exploration Geophysicists of Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97743637; TRN: 96:914760
Availability:
Available from The Society of Exploration Geophysicists of Japan, 2-18, Nakamagome 2-chome, Ota-ku, Tokyo, Japan; OSTI as DE97743637
Submitting Site:
NEDO
Size:
pp. 147-150
Announcement Date:
Jun 03, 1997

Citation Formats

Nakamura, H, Matsuo, T, Yamauchi, Y, and Imanishi, H. Study of evaluation for grouting effect in a borehole; Yakueki chunyu koka hyoka gijutsu ni okeru ichikosatsu. Japan: N. p., 1996. Web.
Nakamura, H, Matsuo, T, Yamauchi, Y, & Imanishi, H. Study of evaluation for grouting effect in a borehole; Yakueki chunyu koka hyoka gijutsu ni okeru ichikosatsu. Japan.
Nakamura, H, Matsuo, T, Yamauchi, Y, and Imanishi, H. 1996. "Study of evaluation for grouting effect in a borehole; Yakueki chunyu koka hyoka gijutsu ni okeru ichikosatsu." Japan.
@misc{etde_472654,
title = {Study of evaluation for grouting effect in a borehole; Yakueki chunyu koka hyoka gijutsu ni okeru ichikosatsu}
author = {Nakamura, H, Matsuo, T, Yamauchi, Y, and Imanishi, H}
abstractNote = {For the foundation improvement works by grouting in a borehole, evaluation of grouting effect is one of the most important management items. The grouting design and works are sometimes reconsidered depending on the evaluation of grouting effect during the test injection. The purpose of the evaluation of grouting effect is to grasp the range of improvement and consolidation after the injection, and to judge and estimate the strength and permeability of the consolidation part. This paper describes the judgment method of the strength using PS logging results and borehole televiewer (BHTV) logging results. The reflection intensity (Ir) by the BHTV logging increased after the grouting, which showed a same tendency as that using S-wave and P-wave velocities (Vs and Vp) before and after the grouting. This was considered to demonstrate the grouting effect. A relation was obtained between the Vs, Vp and Ir before and after the grouting, which was expressed by following equation. Ir=0.143{times}Vs-70=0.093{times}Vp-110. The relation with the dynamic elastic coefficient (Ed) was also obtained as follow; Ir=0.0013{times}Ed. 9 figs.}
place = {Japan}
year = {1996}
month = {Oct}
}