基于非连续变形分析的岩体断裂破坏过程研究  

Research on Rock Mass Fracture and Failure Process Based on Discontinuous Deformation Analysis

作　　者：蔡明智 CAI Mingzhi(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学土木工程学院,长沙410114

出　　处：《计算机测量与控制》2023年第12期310-315,共6页Computer Measurement &Control

摘　　要：工程修建会破坏岩体结构,导致岩体结构的稳定性下降,因此需要对其检测,以保证工程施工的安全性;在此背景下,研究基于非连续变形分析的岩体断裂破坏过程;该研究以某隧道工程对山体的破坏为例,分析了该处岩体结构特征;利用探地雷达技术获取岩体裂隙的非连续变形参数,构建岩体的非连续数值模型并将变形参数插入到模型当中;对模型施加荷载,模拟分析岩体的非连续变形情况并量化岩体断裂破坏程度,包括裂隙的发展、岩体的位移以及稳定性系数,实现岩体断裂破坏过程自动检测;结果表明:裂隙均沿着虚拟节理持续扩展,最终将整个岩体分割为了三个块体,其中有两条裂隙形成了贯穿裂,使得岩体发生断裂;块体1、块体2的断裂破坏过程主要发生在垂直方向;块体3的断裂破坏过程主要发生在水平方向;岩体整体稳定性在逐渐下降,从最初的基本稳定到100 d时之间下降到稳定性差的程度。Engineering construction can damage the rock mass structure,causing the decrease of its stability.Therefore,it is nec-essary to detect it to ensure the safety of engineering construction.In this context,the process of rock mass fracture and failure based on discontinuous deformation analysis is studied.The damage of a tunnel project to a mountain is taken as an example to analyze the structural characteristics of the rock mass.The ground penetrating radar technology is used to obtain the discontinuous deformation parameters of the rock fracture,construct the discontinuous numerical model of the rock mass,and insert the deformation parameters into the model.The load is applied to the model,the discontinuous deformation of the rock mass is simulated and analyzed to quantify the rock mass fracture and failure degree,including the development of cracks,displacement of the rock mass,and stability coeffi-cient,which achieves the automatic detection of the rock mass fracture and failure process.The results show that the cracks continue to expand along the virtual joint,ultimately dividing the entire rock mass into three blocks,with two cracks forming through cracks,causing the rock mass to fracture.The fracture process of block 1 and block 2 mainly occurs in the vertical direction;The fracture process of block 3 mainly occurs in the horizontal direction.The overall stability of the rock mass gradually decreases from the initial basic stability to poor stability in 100 days.

关 键 词：非连续变形分析 岩体断裂破坏过程 探地雷达技术 

分 类 号：TP241.66[自动化与计算机技术—检测技术与自动化装置]