适用于软岩边坡加固的压力分散型预应力锚索锚固机理研究  

Study on the anchoring mechanism of pre-stressed anchor cable with dispersive pressure suitable for soft-rock slope reinforcing

作　　者：金永军[1] 何满潮[2] 王树仁[3] 刘成禹[2] 

机构地区：[1]北京国电华北电力工程有限公司,北京100011 [2]中国矿业大学,北京100083 [3]北京科技大学,北京100083

出　　处：《土木工程学报》2006年第4期63-67,共5页China Civil Engineering Journal

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.

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 

分 类 号：TU457[建筑科学—岩土工程]