【摘要】 在世界最大的生土遗址-交河故城开展现场试验,选用2种长度的锚杆按照基本试验的要求开展拉拔试验,同时在各界面层布设应变监测点。结果表明:8 m长锚杆锚固力达408 kN,满足大体量土遗址锚固的需求;随着长度增加,极限锚固力增长,但平均锚固力减小;复合锚杆各界面剪应力沿着杆长呈现单峰值或多峰值的空间分布特征,随着荷载的增加,界面各点剪应力增加并且向锚固末端传递,峰值剪应力亦同时向锚固末端偏移;试验过程中在较高荷载下出现界面剪应力状态转化的现象。更多还原

【Abstract】 The field experiment was carried out in Jiaohe ruins(the largest earthen sites of the world), and two bolts with different lengths were pulled out according to the requirement of the basic experiment, meanwhile, strain monitoring points were set up along the interfaces of the bolts. The results show that the bolt of 8 m can get the anchorage force of 408 kN, which meets the conservation demand of large-scale earthen sites; with the increase of the bolt length, the maximum anchorage force increases and the average anchorage force decreases. There are single-peak and multi-peak distributions in the interfaces along the bolt. With the increase of the load, interfacial shearing stress increases and transfers to the end of the bolt as well as the peak shearing stress of the interface; the condition transformation of shearing stress takes place under large load during experiment.更多还原