预应力锚索锚固机理的数值模拟试验研究  

NUMERICAL SIMULATION TESTING STUDY ON REINFORCEMENT MECHANISM OF PRESTRESSED ANCHORAGE CABLE

作　　者：丁秀丽[1] 盛谦[1] 韩军[2] 程良奎[3] 白世伟[1] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学重点试验室,武汉430071 [2]长江科学院岩基研究所,武汉430019 [3]冶金部建筑研究总院,北京100088

出　　处：《岩石力学与工程学报》2002年第7期980-988,共9页Chinese Journal of Rock Mechanics and Engineering

摘　　要：为研究预应力锚索对三峡船闸高边坡岩体的加固效果,采用三维显式有限差分法,建立预应力锚固数值仿真模型,进行一系列计算机模拟试验。结果表明:预应力锚索在张拉过程中在岩体内形成了表层压缩区,由于多根预应力锚索的作用,每根锚索的压应力集中区互相叠合形成一个连续分布的压缩带,其分布形态与锚索布置方式、间距、锚索根数以及预应力的大小有关。对于三峡船闸高边坡,在预应力锚索和系统锚杆的共同作用下形成表层压缩带,构成了所谓的岩石锚固墙,进而缓解岩体力学性状随开挖爆破的劣化过程,限制边坡岩体的变形,改善了边坡的稳定性。The reinforcement effects of prestressed anchorage cable are studied on the high shiplock slope of Three Gorges Project by means of numerical simulation using the 3-D explicit finite difference method. The results show that a compressive zone is formed on the surface of rockmass during the tensile process. As a result of reinforcement of numbers of cables, the continuous compressive zone namely, rock anchored wall is formed under the combinative action of prestressed anchorage cables and system anchor bolts. Thus, the deterioration of the property of rockmasses is prevented, the deformation of slope decreased and the stability of slope improved.

关 键 词：边坡 稳定性 三峡工程 预应力 锚索 锚固 数值模拟 试验 

分 类 号：TV223.1[水利工程—水工结构工程]