岩土工程学报2018，Vol.40Issue(1)：139-146,8.DOI:10.11779/CJGE201801014
柱状节理玄武岩松弛圈尺寸效应及地应力影响
Influences of size effect and in-situ stress of columnar jointed basalt relaxation zone
王鹏 1洪望兵 1宋刚2
作者信息
- 1. 浙江华东建设工程有限公司,浙江 杭州 310014
- 2. 中国电建集团华东勘测设计研究院有限公司,浙江 杭州 311122
- 折叠
摘要
Abstract
To investigate the influences of size effect and in-situ stress of columnar jointed basalt relaxation zone, 8 typical tunnels with different sizes are selected, and an empirical formula for relaxation depth is established based on the data statistics and curve fitting of 161 groups of test results by using the single-hole acoustic wave tests. The test results show that the excavation section size and high in-situ stress are the two main influencing factors of the relaxation depth. The maximum relaxation depth appears in the middle-upper part of side wall of cavern, the size effect is obvious and linearly correlates with the height of cavern, and high in-situ stress will increase the size effect. Under the low in-situ stress, the relaxation depth is generally 1/6 of the height of cavern. Under the high in-situ stress, the relaxation depth is generally 1/3 of the height of cavern, and in the middle of 24 m-high cavern wall, the extreme relaxation depth will reach 10.2 m.关键词
柱状节理玄武岩/松弛/尺寸效应/地应力/声波测试Key words
columnar jointed basalt/relaxation/size effect/in-situ stress/acoustic ware test分类
建筑与水利引用本文复制引用
王鹏,洪望兵,宋刚..柱状节理玄武岩松弛圈尺寸效应及地应力影响[J].岩土工程学报,2018,40(1):139-146,8.
