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Volume 18 (2008)
- Issue 4 Pages 239-
- Issue 3 Pages 156-
- Issue 2 Pages 80-
- Issue 1 Pages 4-
Volume 18, Issue 3
Displaying 1-5 of 5 articles from this issue
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Trial in-situ of Real Time Construction Management SystemKouichi OGURA, Hiroshi FURUYA, Yoshihiko HIKITA, Keisuke HIGO2008 Volume 18 Issue 3 Pages 156-165
Published: September 15, 2008
Released on J-STAGE: March 06, 2009
JOURNAL FREE ACCESSField banking tests are ordinary carried out to specify the construction method to control the quality of the rock-fill dam bank. While constructing dam body, in-situ density tests are executed to judge the fill quality. But the tests need a lot of time and effort, so a new quality management system is demanded.
This paper reports about the trial case of the real time fill quality management system using the 3D-CAD, GPS, and "α-system".
This trial case is also put into operation to be evaluated by the New Technology Information System (NETIS).View full abstractDownload PDF (2235K) -
Yoshikazu YAMAGUCHI, Hiroyuki SATOH, Naoyoshi HAYASHI, Hisayuki YOSHIN ...2008 Volume 18 Issue 3 Pages 166-181
Published: September 15, 2008
Released on J-STAGE: March 06, 2009
JOURNAL FREE ACCESSIt is necessary to evaluate shear strength of rock materials, which are major materials for a rockfill dam, considering the confining pressure dependency for the rationalized design and seismic performance evaluation of this type of dam. However, the triaxial compression test, which is the most common strength test for rockfill materials, has a problem in test precision under low confining pressure condition.
In this study, we carry out large-scale triaxial compression tests under low confining pressure, large-scale box shear tests, and laboratory and field surface sliding tests for rock materials. Based on results of these tests, we investigate the evaluation method of the shear strength of rockfill materials under low confining pressure condition. In addition, we discuss the setting method of the design strength of rock materials considering the confining pressure dependency.View full abstractDownload PDF (1241K)
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Yoshihisa TAKADA, Kei SHINAGAWA, Toshiyuki SUGAHARA, Hiroaki KOBAYASHI2008 Volume 18 Issue 3 Pages 182-193
Published: September 15, 2008
Released on J-STAGE: March 06, 2009
JOURNAL FREE ACCESSIsawa Dam is counted as one of the largest rock-fill dam in Japan with its banking volume of 13,500,000 m3. Because the construction site is located at severely cold climatic condition of Tohoku region, the operation days of construction were limited, and therefore effective construction was necessary. Advanced IT technologies were adopted as an important program in rationalizing the construction management and quality control. This report expresses proposes of the rationalization of the future quality control based on a statistical analysis result of these accumulated data.View full abstractDownload PDF (2184K) -
Kouji NIEDA, Kouki KOKONOE, Takao SUZUKI, Minoru AIHARA2008 Volume 18 Issue 3 Pages 194-205
Published: September 15, 2008
Released on J-STAGE: March 06, 2009
JOURNAL FREE ACCESSNakakoba Dam is the concrete gravity dam in Saga prefecture. The side of dam body is constructed on Quaternary sedimentary rocks, which has weak strength and partial high permeability. In planning of dam, large downstream footing was placed to have sufficient strength. Additionally, for the purpose of reinforcement of left weak abutment which consists of sedimentary rocks, consolidation grouting was filled up all foundation of dam.View full abstractDownload PDF (4745K)
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SAKURAI SAKURAI, Hiroo SHIOJIRI2008 Volume 18 Issue 3 Pages 206-212
Published: September 15, 2008
Released on J-STAGE: March 06, 2009
JOURNAL FREE ACCESSDynamic performance of a concrete dam can be largely affected by dam-reservoir waterfoundation interaction. An attempt to implement a time domain implicit PML scheme was made in this paper,and the method was proven efficient with numerical examples.View full abstractDownload PDF (441K)
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