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根据现有棚索组合支护方式,分类并分析了棚索结构不关联、棚索结构直接相关联、棚索结构间接相关联组合支护特性,计算了关联构件的承载能力,得出现有棚索组合方式耦合效果欠佳的结论。提出棚索结构互补支护原理:锚索既加固围岩又补强支架弱截面,支架既支撑围岩又扩大锚索支护面积。据此设计了棚索结构互补组件,包括锚索转荷梁、支架转荷梁、拉杆与双头螺母,给出棚索互补组件使用方法;理论计算了支架弱截面位置、分析了支架2类屈服方式,得出正弯矩屈服截面是棚索结构互补的最佳位置;给出棚索结构互补时机的确定方法。实践表明,通过棚索结构互补支护技术可有效发挥棚索各自支护优势,实现维护围岩稳定。
According to the existing combination method of canopy and sidings, the unstructured and unscraped structures of canopy cable are directly associated with shackle structure and the supporting properties of canopy structure are indirectly associated with each other. The bearing capacity of related components is calculated, and the existing sheds Cable combination of the coupling effect of poor results. The principle of complementary support of shackle structure is put forward. The anchor cable not only reinforces the surrounding rock but also reinforces the weak section of the support. The support not only supports the surrounding rock but also enlarges the support area of the anchor cable. Based on this, the complementary components of the shackle structure are designed, including the load-carrying beam of the anchor cable, the load-carrying beam of the support, the pull rod and the double-headed nut, and the method of using complementary components of the shackle is given. The weak cross section position of the support is calculated theoretically, Yielding method, the yielding section of positive bending moment is the best complementarity of shackle structure, and the method of determining the timing of complementarity of shackle structure is given. Practice shows that the complementary support technology of canopy structure can effectively exert the advantages of each supporting of canopy cable and maintain the stability of surrounding rock.