新型压力均布型锚索锚固机理的试验研究

通过改变压力型锚索锚固段承载体结构形式和锚固段围岩强度,研究新型压力均布型锚索锚固段承载体和砂浆之间作用力传递机理,获得承载体压力分布及其大小,阐述注浆体抗剪性能的变化,从而可以确定压力均布型锚索合理的承载体结构形式。研究结果表明压力均布型锚索承载体轴力沿钢管径向均布,承载体表面肋状结构增加砂浆体的抗剪性能,大大提高压力均布型锚索的锚固能力,从而可以优化锚索锚固段的长度。

Experimental investigation on the anchorage mechanics of anchorage cable of the late model with the pressure uniform

A series of mechanical properties tests on the supporting body of anchorage cable of late model were carried out,with the forms of the supporting body structure in the anchorage segment of pressure-type anchorage cable,and the strength of surrounding rock in the anchorage segment varied.Those were aimed to study the transfer mechanism of acting forces between the supporting body in the anchorage segment of anchorage cable with pressure uniform and the bearing motor.Those could be used to gain the distribution and magnitude of axial stress and shear stress of the supporting body,as well as the resisting shear performance of the bearing motor.The reasonable structure of supporting body of anchorage cable with the pressure uniform could be determined by the tests results.The research showed that the axial stress is distributed with uniform linear form along the steel pipe radius of supporting body with the pressure uniform.The rib-like structure on the surface of the supporting body could improve the resisting shear properties of the bearing motor and raise the anchorage force of the anchorage cable with the pressure uniform.The tests results could be used to optimize the length of the anchorage segment.