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基于PS溶液的楠竹锚杆锚固系统在夯筑土遗址加固中得到了成功的应用,然而其锚固机理研究还未开展。运用室内物理模型试验,针对该锚固系统开展了拉拔测试与杆体-浆体界面应变监测,研究了该锚固系统的锚固性能与破坏模式、杆体-浆体界面剪应变分布与传递特征。试验结果表明基于PS-F浆液锚固系统和基于PS-(C+F)浆液锚固系统均为杆体-浆体界面失效模式,极限锚固力分别为10~15k N和8~16k N;锚固系统均具有较强的延性;在荷载进程中杆体-浆体界面的应变分布具有单峰值及双峰值特点,荷载增加时界面应力向锚固末端传递、压应力出现在锚固段末端及峰值局部出现在末端等特征。研究结论表明,锚固系统的力学性能适用于夯筑土遗址加固,但在杆材耐久性和完整性保证方面还需要进一步探究。
Nanchuang anchoring system based on PS solution has been successfully applied in the reinforcement of rammed earth, however, the research on its anchoring mechanism has not been carried out yet. Using the physical model test in laboratory, the pullout test and the strain monitoring of the rod-body interface were carried out. The anchoring performance and failure mode of the anchoring system, the shear strain distribution and transmission characteristics at the rod-body interface were studied. The experimental results show that both the PS-F slurry anchoring system and the PS- (C + F) slurry anchoring system are rod-slurry interface failure modes, and the ultimate anchoring forces are 10 ~ 15k N and 8 ~ 16k N respectively. Which has strong ductility. The strain distribution at the rod-body interface has single peak and bimodal characteristics during the loading process. When the load increases, the interface stress is transmitted to the anchoring end. The compressive stress appears at the end of the anchoring segment and the peak appears locally at the end feature. The conclusion of the study shows that the mechanical properties of the anchoring system are suitable for the reinforcement of rammed earth sites, but further research is needed to ensure the durability and integrity of the slab.