摘要
为了研究压力型锚杆锚固段流变特性,进行了室内锚固系统拉拔蠕变试验。通过设计不同锚固段长度和灌浆体强度,试验研究了不同长度的锚固体在不同荷载作用下轴向位移随时间变化的规律,深入对比了不同强度的砂浆和不同锚固段长度对锚固效果的影响。试验得出:试件的破坏形式与灌浆体的长度和灌浆体的强度等级密切相关,灌浆体长度为300 mm的试件发生钢筋断裂,长度小于300 mm的试件则沿第二锚固界面的破坏,基体强度较小时在径向压力增大到一定值时,基体率先开裂。
Rheological properties of pressure - type anchors are studied by the pulling - out test of an- chorage system in laboratory. The anchorage system is well designed and produced. The test data is reliable and is in line with scientific laws. By designing with the different fixed anchor lengths and mortar strengths, the test studies that the displacements change over time along the axial direction un- der different load. Compare deeply the different strength of mortar and the different anchorage length on the anchoring effect. It concluded that the fracture of the grouting body whose length is 300 mm re- inforcement, the destruction of the specimen whose grouting body＇ s length is less than 300 mm is on the second interface of anchorage; when the concrete strength is small, if the radial stress increases to a certain value, the matrix was to crack in the first.
出处
《河北工程大学学报（自然科学版）》
CAS
2015年第3期34-37,共4页
Journal of Hebei University of Engineering:Natural Science Edition
基金
湖南科技大学研究生创新基金资助项目(S140005)
关键词
压力型锚杆
室内拉拔试验
锚固段长度
砂浆强度
第二锚固界面
pressure - type anchors
pulling test in laboratory
anchorage length
mortar strength
the second anchorage interface
