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与国外相比,国内锚杆标准中的技术尚有改进空间。借鉴欧美日最新标准,建议:增加一种锚杆结构划分方法,即按内部结构划分为黏结段、非黏结段及张拉段;基本试验可调整细分为基本调查试验及适应试验,并将前者定性为探究性试验;可采用表观自由长度替代弹性变形以作为锚杆抗拔试验变形评价指标;研究及增加在锚固段与自由段分界处设置止浆塞的技术要求;明确荷载分散型锚杆的张拉只应采用荷载控制方法;研究及增加对锚筋驻留荷载的提离检查;锚杆锁定荷载提高至不小于0.9倍设计承载力。
Compared with foreign countries, there is still room for improvement in the technology of the domestic anchor standards. According to the latest standards of Europe, America and Japan, it is suggested that a method of dividing the anchor structure is added, that is, divided into sticking section, non-sticking section and tensioning section according to the internal structure. The basic test may be subdivided into basic investigation and adaptation test, The former is characterized as an exploratory test; the apparent free length can be used instead of elastic deformation as an index to evaluate the deformation of rock bolt during pull-up test; the technical requirements for setting a stop plug at the boundary between the anchored section and the free section are studied and increased; Only the load control method should be adopted for the tensioning of the anchor rod; the lift check on the resident load of the anchorage reinforcement should be researched and increased; the locking load of the anchor rod should be increased to not less than 0.9 times the designed bearing capacity.