CAJ | 학술논문

预应力锚索是目前高边坡工程和洞室围岩支护的重要手段,由于锚索摩阻力的存在,导致锚固力不能有效传递,在岩体发生变形时,极易在张拉端形成应力集中从而导致锚索破坏. 提出一种新型的让压锚索,通过现场试验,对摩阻力进行测试并对其形成机理和存在的危害进行了探讨. 分析认为,目前锚索居中和绑扎方式是影响摩阻力的重要因素,摩阻力的存在是削弱锚索变形能力和产生预应力损失的重要原因.
예응력묘색시목전고변파공정화동실위암지호적중요수단,유우묘색마조력적존재,도치묘고력불능유효전체,재암체발생변형시,겁역재장랍단형성응력집중종이도치묘색파배. 제출일충신형적양압묘색,통과현장시험,대마조력진행측시병대기형성궤리화존재적위해진행료탐토. 분석인위,목전묘색거중화방찰방식시영향마조력적중요인소,마조력적존재시삭약묘색변형능력화산생예응력손실적중요원인.
Prestressed anchor cable is an important means to support the high rock slope and the surrounding rock of cave at present. However, the anchoring force can not be transferred due to the existence of frictional resistance of prestressed anchor ca-ble. The stress can be easily concentrated in the tensioning section and damages the prestressed anchor cable when rock mass de-forms. The pre-tension yield anchor cable, a new kind of anchor cable, is put forward. The test on the frictional resistance is performed and the forming mechanism of frictional resistance and harm are discussed. The result showed that the centering layout and the binding form of cable are the influential factors of the frictional resistance, and the frictional resistance is an important cause for the wakening of the anchor cable's deformability and the prestress loss.