帕隆藏布流域高位危岩体工程影响分析方法

Systematic analysis method of rockfall in paronzangbo basin

复杂山区高位危岩体工程影响评价依赖于危岩体的准确及全面识别、落石运动特征及影响范围的科学分析。基于“机载倾斜摄影技术+机载激光LiDAR技术”的高位危岩体复合勘察方案,完成了帕隆藏布交通廊道内65处高陡坡面上显性危岩体、隐蔽性危岩体、坡脚落石的高精度、高效率识别与三维数字化建模,解决了传统识别方法在局部植被茂密区识别精准度低的问题;借助Unity3D开发平台,充分利用高位危岩体解译成果,自主编程实现了高精度、超大高差的真实崩塌场景构建,结合现场落石的调查解译进行参数优化和结果验证,确保了模拟结果的客观性。在大量数值模拟的基础上,提出了落石影响范围确定方法与基于危岩体的选线及局部优化原则。

The engineering impact of high-steep rockfall in mountainous area depends on accurate and comprehensive identification of rockmass,scientific analysis of rockfall movement and determination of the envelope of rockfall.Based on the composite survey scheme of airborne oblique photography technology and airborne laser LiDAR technology,the high-precision and high-efficiency identification and three-dimensional digital modeling of dominant rockmass and concealed rockmass on 65 high and steep slopes in Paronzangbo basin were completed,which solved the problem of low identification accuracy of traditional identification methods in local dense vegetation areas.Based on Unity3D platform,and make full use of the interpretation results,the real collapse scene with high precision and large height difference can be constructed by independent programming.Combined with the field investigation and interpretation of rockfall,the parameter optimization and result verification are carried out to ensure the objectivity of the simulation results.On the basis of a large number of numerical simulations,method for determining the envelope of rockfall and the principle of route selection and local optimization is put forward.