摘要
根据岩土锚固的有关试验资料,分析了影响锚杆灌浆体与岩土体间粘结强度的主要因素,提出了锚杆灌浆体与岩土体间粘结强度的建议值,并指出了锚杆受荷时,沿锚固段长度粘结应力分布的不均匀性,其不均匀程度随锚固段长度的增加而加剧。以往在计算锚杆抗拔力公式中对不同锚固长度的锚杆均采用单一的粘结强度值是不合理的,而应引入锚固长度对粘结强度的影响系数。
Based on the related test data of anchorage in rock and soil, the main factors affecting the bond strength between grouting anchor rod and rock or soil are analyzed; and the bond strength value is suggested. It is indicated that the distribution of the bond stress along the fixed length of the anchor rod is nonuniform when the anchor rod is loaded; and the nonuniform degree enhances with the increasing of the fixed length. The former formulae of calculating withdrawal resistance of the anchor rod are irrational for the value of the bond strength is kept constant for the anchor rods with different anchorage lengths. Therefore, the influence coefficient of the anchorage length on the bond strength should be introduced.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第19期3482-3486,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩土力学
岩土锚固
粘结强度
灌浆体
影响系数
rock and soil mechanics
anchorage in rock and soil
bond strength
grouting： influence coefficient
