摘要
锚杆从锚固方式上可划分两种:端部锚固方式和全长锚固方式。全长锚固锚杆作为工程支护中的一种重要锚杆类型,具有广泛的应用前景。非连续变形分析(DDA)以及在此基础上发展的非连续变形的岩石断裂分析(DDARF)方法中锚杆为端锚形式,且只考虑了锚杆的轴向作用,而忽略了锚杆作用力对锚固岩体的侧向限制。为了更好地理解锚杆的支护机制,考虑锚杆的剪切作用,提出了DDARF中一种新的锚固形式——全长剪切锚杆支护形式。用改进的全长剪切锚杆支护方法对一公路隧道稳定性进行了分析,并与端锚支护形式进行了对比,结果表明,提出的全长剪切锚杆支护方法是有效的,锚固效果比端锚支护更好。
From the anchoring way, anchor bolt has been divided into two kinds： end anchorage mode and full-column anchorage mode. As an important anchor bolt type of engineering support, full-column anchorage bolt has a broad application prospect. Only the end anchorage bolt is used in discontinuous deformation analysis（DDA）, and its extended procedure DDARF method, while, the axial role of bolt is considered and the lateral limit of the bolt＇s anchor force to rock masses is ignored. In order to better understand the bolt support mechanism, and to consider the shear effect of bolt, a new bolt form of DDARF is put forward—full-column shearing anchor bolt. The surrounding rock＇s stability of a highway tunnel is analyzed with this improved full-column shearing anchor bolt, the results are compared with that of end support anchor bolt; and show that, this full-column shearing anchor bolt is effective, and has better anchorage effect than end anchorage support.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2014年第1期293-297,共5页
Rock and Soil Mechanics
基金
国家自然科学基金重点项目(No.51139004)
教育部博士点基金(No.20110131110030)
山东省自然科学基金重点项目(No.ZR2009AZ001)
