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若材齢トンネル吹付けコンクリートの変形特性に関する研究
| Title: | 若材齢トンネル吹付けコンクリートの変形特性に関する研究 |
| Other Titles: | Study on Deformation Characteristics of Young-Age Tunnel Shotcrete |
| Authors: | 谷, 卓也1 Browse this author | | 青木, 智幸2 Browse this author | | 小川, 豊和3 Browse this author | | 武田, 均4 Browse this author | | 藤井, 義明5 Browse this author →KAKEN DB |
| Authors(alt): | Tani, Takuya1 | | Aoki, Tomoyuki2 | | Ogawa, Toyokazu3 | | Takeda, Hitoshi4 | | Fujii, Yoshiaki5 |
| Keywords: | Shotcrete | | Tunnel Support | | NATM | | Young-Age Concrete | | Stress Relaxation | | 吹き付けコンクリート | | トンネル支保 | | 若材齢コンクリート | | 応力緩和 |
| Issue Date: | 25-Feb-2012 |
| Publisher: | 資源・素材学会 |
| Journal Title: | Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan |
| Volume: | 128 |
| Issue: | 3 |
| Start Page: | 113 |
| End Page: | 120 |
| Publisher DOI: | 10.2473/journalofmmij.128.113 |
| Abstract: | Uniaxial compression tests and multi-stage stress relaxation tests for specially prepared young-age tunnel shotcrete were carried out. Comparing to previous studies, clip gauges were determined to be the best to evaluate elastic moduli of young-age tunnel shotcrete. Uniaxial compressive strength and 33% secant modulus were larger than those of base concrete till 1 day, however, they became less than those of base concrete after then. Uniaxial compressive strength and 33% secant modulus till 1day showed a linear relationship. This means that 33% secant modulus could be determined from uniaxial compressive strength which is routinely determined at tunnel construction sites. In the multi-stage stress relaxation test, displacing rate significantly affected 33% secant modulus. This will result in significant change in support response to rock mass deformation. Stress decrease by yielding and stress increase with curing time even after the yielding were observed for slow loading multi-stage tests. The above findings will help to design reasonable tunnel supports through precise stress analyses around tunnel faces. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/53014 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 藤井 義明
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