摘要
介绍了水压致裂法和钻孔弹性模量法在布西坝址边坡地应力场及该区域岩体力学性状研究中的综合应用,其中包括测试区域岩体水平主应力、弹性模量和变形模量的大小及其分布规律。研究结果表明:坝址右岸边坡的应力水平明显高于左岸,而浅部测试的模量值均较小,揭示了边坡表层及河床附近岩体的力学性质。最后根据测试结果分析了边坡卸荷机制,初步划定卸荷界限,为拱坝坝肩边坡的合理开挖提供了依据。
The integrated application of hydro-fracturing and borehole deformation in the study of geostress field and slope rock mass mechanical characters in a dam site is presented.This study includes the quantity and distribution of horizontal principal stresses,static elastic modulus and deformation modulus in the measuring zones.The results indicate that the geostresses of right bank are obviously higher than those at the left bank and the moduli of shallow rock mass are almost lower.The results of both measurements reveal the shallow and riverbed rock mass mechanical characters.At last,the unloading mechanism of slope is analyzed based on the measurement results and the primary unloading boundary is also provided,which can provide reference to the logical excavation of the arch dam bank slope.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第z2期3959-3964,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩石力学
水压致裂法
钻孔弹性模量
坝址
边坡
卸荷带
rock mechanics
hydro-fracturing method
borehole elastic modulus
dam site
slope
unloaded zone
