【摘要】 汶川地震表明,地震引起塌方,导致交通生命线中断,是阻碍抢险救援的主要原因。调查分析发现,现有预应力锚索锚固结构存在较突出的抗震问题。抗震锚索通过缓冲地震瞬间冲击力、与岩土体协调变形、抵御动荷载等作用,可避免锚固体系在强震条件下发生毁灭性破坏。抗震锚索工作性能试验和现场破坏性试验表明,抗震内锚具满足抗震设计要求。提出抗震锚索的设计、施工技术与检测验收标准,介绍抗震锚索用于强震区的工程案例。更多还原

【Abstract】 The Wenchuan earthquake shows that landslide caused by earthquake and subsequent interruption of transportation lifeline are major reasons hindering rescue and relief.Investigation and analysis found outstanding anti-seismic problems exist in anchorage structure of present prestressed anchor cables.The anti-seismic anchor cables can avoid devastating damage to anchorage system under the condition of strong earthquake by buffering instant impact of earthquake,harmonious deformation with rock-soil and resisting dynamic load,etc.Test for working performance of anti-seismic anchor cables and destructive test on site show that anti-seismic internal anchorage satisfies the requirements of seismic design.This paper proposes design,construction techniques and standards of detection and acceptance of anti-seismic anchor cables,and introduces project cases of anti-seismic anchor cables used in areas of strong earthquake.更多还原