锚杆系统中不同垫板形式及各参数影响研究  

Research on the Influence of Different Backing Plate Forms and Various Parameters in the Bolting System

作　　者：陈家征 李忠 CHEN Jiazheng;LI Zhong(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China;Key Laboratory of Roads and Railway Engineering Safety Control of Ministry of Education,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室,河北石家庄050043

出　　处：《河北工程大学学报(自然科学版)》2025年第1期33-42,65,共11页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：国家自然科学基金-青年科学基金资助项目(41804145)。

摘　　要：以力学理论为基础,根据垫板在荷载作用下的承载性能,建立平板和碗形垫板的承载力理论公式,通过建立“垫板-围岩”三维数值模型,分析荷载作用下垫板形式及结构参数对垫板承载性能的影响,优选出适配锚杆的垫板形式及结构参数。结果表明:在300 kN荷载作用下,锚杆系统若选用碗形垫板,参数应为:尺寸300 mm×300 mm×180 mm,拱高35 mm,孔口半径34 mm,碗底半径60 mm;若选用平板垫板,参数应为:尺寸280 mm×280 mm×255 mm,开孔直径26 mm,锚具半径64 mm。在荷载作用下碗形垫板控制围岩变形效果更好。Based on the theory of mechanics,theoretical bearing capacity formulas for flat and bowl shaped pads are established according to the bearing performance of the pad under load.By establishing a three-dimensional numerical model of“pad rock”,the influence of pad form and structural parameters on the bearing performance of the pad under load is analyzed,and the pad form and structural parameters suitable for anchor bolts are selected.The results show that under a load of 300 kN,if a bowl shaped cushion plate is selected for the anchor system,the parameters should be 300 mm×300 mm×180 mm,arch height of 35 mm,aperture radius of 34 mm,and bowl bottom radius of 60 mm;If a flat pad is selected,the parameters should be 280 mm×280 mm×255 mm,with a hole diameter of 26 mm and an anchor radius of 64 mm.The bowl shaped cushion plate has a better effect on controlling the deformation of surrounding rock under load.

关 键 词：锚杆系统 承载性能 垫板形式 影响参数 数值模拟 

分 类 号：TU4[建筑科学—土工工程]