Journal of Japan Society of Dam Engineers
Online ISSN : 1880-8220
Print ISSN : 0917-3145
ISSN-L : 0917-3145
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Volume 3, Issue 10
Displaying 1-5 of 5 articles from this issue
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  • A Study on Placing Speed for Concrete Gravity Dam
    Ariyoshi YAMAZUMI, Kazuo KARITA, Shigeharu JIKAN, Tuyoshi TANI
    1993 Volume 3 Issue 10 Pages 4-10
    Published: June 15, 1993
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11315/jsde1991.3.10_4
    JOURNAL FREE ACCESS
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    It is considered that concrete gravity dams constructed by the rationalized construction methods such as the RCD method or the ELCM (Extended Layer Construction Method) are more advantageous to thermal stress than the conventional construction method, for the concrete has a little content of cement and is placed rapidly and continuously.
    With regard that, the authors carried out thermal stress analysis by the Restraint Matrix Method in order to study on thermal strain in the dam body.
    As a result, the proposal for placing speed in the rationalized construction method is to be attempted introducing the relative placing speed which is placing speed divided by dam height.
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  • Effect of Post-Cooling by Flowing Watrer Curing of Concrete
    Masaaki TAKATORI, Yasushi TANAKA, Noboru IGARASHI
    1993 Volume 3 Issue 10 Pages 11-19
    Published: June 15, 1993
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11315/jsde1991.3.10_11
    JOURNAL FREE ACCESS
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    In the construction of concrete dams, controling temperature rise of concrete is one of the most important theme in point of thermal stress. Now we keep our eyes upon the effect of postcooling by flowing water curing of concrete as a new device for this theme.
    This paper discusses about the effect of post-cooling by flowing water curing of concrete through the field tests.
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  • Examinations on the Evaluation of Rock Heterogeneity by Fractal Property of Rock Fractures
    Yoshio UDAGAWA
    1993 Volume 3 Issue 10 Pages 20-28
    Published: June 15, 1993
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11315/jsde1991.3.10_20
    JOURNAL FREE ACCESS
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    A fractured rock mass often has a spatial heterogeneity due to concentration of fractures such as joints. In this paper, the author examined the evaluation method of rock heterogeneity based on the fractal property of rock fracture systems and investigated the fractal structure of rock fracture systems around the fault sheared zone. Here, the word “fractal” is used in a sense of statistical self-similarity, and the fractal dimension was calculated by boxcounting method.
    The results indicated that the closer fractal structure to the fault sheared zone has the bigger fractal dimension. The author considered these results as follows: -the fault sheared zone and the fractures seem to have grown up under the uniform tectonic stress so that the local stress field through fault formation has been reflected by the distribution of fractal dimension around the fault sheared zone.
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  • On the Blanket Grouting of the Kamiosu Dam
    Hiroaki OKUDA, Masakazu AIDA, Kenzo NISHINO
    1993 Volume 3 Issue 10 Pages 29-40
    Published: June 15, 1993
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11315/jsde1991.3.10_29
    JOURNAL FREE ACCESS
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    Kamiosu Dam is a rockfill dam under construction with vertical clay core, a height of 98m, a crest length of 294.5m and a total fill volume of 3, 150×103m3 to form the lower reservoir of the Okumino Pumped Storage Power project (1, 500MW) by the Chubu Electric Power Co. Inc.. The foundation rock is made up of a little weathered sandstone, shale and their alternates which are formed at Jurassic peried of Mesozoic era, but since large or small folds are developed, a difficulty of grouting is predicted.
    In this report, the plan and results on the blanket grouting of the Kamiosu Dam are described and an example of the effective grouting procedure by a series of informationoriented methods is gived.
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  • [title in Japanese]
    Tsutomu YAMAMURA, Yoshifumi KOBAYASHI
    1993 Volume 3 Issue 10 Pages 41-57
    Published: June 15, 1993
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11315/jsde1991.3.10_41
    JOURNAL FREE ACCESS
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    Cirata dam, located on the Citarum River in the West Java District, the Republic of lndonesia, was succesfully completed in 1988. The purpose of the dam is power generation.
    The dam is concrete faced rockfill type (CFRD), 126m high, 453m long at the crest, and has a volume of about 3.8×106m3 of rockfill.
    In Japan, however, for various reasons, there are no data on CFRDs available for reference concerning newly innovated designs and construction techniques, observations of dam behavior during and after reservoir impounding, etc.
    Thus, this paper deals mainly with the following two points which are regarded to be peculiar and especially important for CFRDs.
    (1) Dam structures and instrumentations.
    (2) Observations of dam behavior after the first year of operation and interpretation of the observed data.
    Several materials listed at the end of this paper are available for further references.
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