摘要
利用有限差分程序FLAC对压力分散型预应力锚索的锚固机理进行了研究。和拉力集中型锚索相比,压力分散型锚索有以下优点:锚固段浆体轴力峰值仅为拉力集中型的1/n(n为承载体的数量)且为受压状态;剪力峰值较小且能较均匀地分布于整个锚固长度上;可以提供较大的锚固力。这些特点说明压力分散型锚索更适用于软岩边坡的加固,增加承载体的数量是提高压力分散型锚索锚固力、改善其受力状态的有效途径。
This paper researched the anchoring mechanism of one new type of pre-stressed anchor cable, which is pre-stressed anchor cable with dispersive pressure （PACDP） , using FLAC. Results indicate that PACDP has several advantages and is more suitable for soft rock slope reinforcing compared with pre-stressed anchor cable with concentrated tension （PACCT） . The peak value of axial stress of PACDP is only 1/n （n is the number of supporting） of that of PACCT, and the grouted part is in compression. In addition, the peak value of shear stress between the grouted part and the drilling wall of PACDP is also smaller than that of PACCT, and it is evenly distributed along the axis of the anchor. PACDP can provide larger anchoring force than PACCT. It is an effective way to enhance the anchoring force and to improve the mechanical conditions through increasing the number of supporting.
出处
《土木工程学报》
EI
CSCD
北大核心
2006年第4期63-67,共5页
China Civil Engineering Journal
关键词
软岩
边坡
压力分散型预应力锚索
锚固机理
数值模拟
soft rock
slope
pre-stressed anchor cable with dispersive pressure
anchoring mechanism
numerical simulation
