南竹加筋复合锚杆加固土遗址研究

STUDY ON REINFORCEMENT OF EARTHEN SITES BY BAMBOO-STEEL COMPOSITE ANCHOR

南竹加筋复合锚杆是专门针对大体量土遗址加固设计的一种新型锚杆。通过试验证明,采用PS系列灌浆、南竹加筋复合锚杆加固土遗址符合文物保护的原则。当采用水泥砂浆作为灌浆材料时南竹加筋复合锚杆单位锚固力可采用30kN/m,当采用PS-(F+C)浆液灌浆时单位锚固力可采用20kN/m。南竹加筋复合锚杆加固土遗址时的薄弱界面是锚杆杆体与锚固体之间,水泥砂浆和PS-F灌浆材料的强度都可以满足南竹加筋复合锚杆锚固时的要求,水泥砂浆锚固体与锚杆杆体的黏结强度标准值为187kPa,特征值为85kPa;12%PS-F与粉煤灰锚固体与锚杆杆体的黏结强度标准值为114kPa,特征值平均为52kPa。

The bamboo-steel composite anchor is a kind of new anchor that is designed for aiming at the bulk earthen sites. According to the test, the reinforcement of earthen sites accords with the principle of the heritage sites protection by adopting the PS series of grout material and the bamboo-steel composite anchor. If adopting the cement mortar as grout material, its anchoring unit power can be adopted 30 kN/m; if adopting the PS-（F＋C） as grout material, its anchoring unit power can be adopted 20 kN/m. When reinforcing the earthen sites by the bamboo-steel composite anchor, its weak interface exists between anchor body and anchoring solid. The strengths of cement-mortar and PS-F slurry are adopted for anchoring by the bamboo-steel composite anchor. The standard value of cohesive strength averages 187 kPa, the eigenvalue averages 85 kPa between the cement-mortar and anchor body. The standard value of cohesive strength averages 114 kPa, the eigenvalue averages 52 kPa between the 12% PS-F and anchor body.