爆破荷载作用下土岩组合边坡稳定性分析研究

发布时间：2018-05-15 02:01

本文选题：爆破振动 + 土岩组合边坡　；参考：《贵州大学》2015年硕士论文

【摘要】：边坡稳定问题是边坡工程长期研究内容,本文针对典型土岩组合边坡结构,针对一般边坡开挖爆破过程,模拟了土岩组合边坡在开挖过程中受到爆破振动影响下沿临空面高度方向及水平方向边坡质点的振动特性。文中首先介绍了炸药爆炸对岩石的破坏机理及振动波产生机理,介绍了振动波的类别,分析了爆破振动波在介质中的传播特性及其对构筑物的影响,比较了爆破振动波与天然地震波的异同;其次,分析了岩质边坡及土质边坡的主要破坏形式,并从理论上分析了土岩组合边坡可能出现的破坏形式,介绍了动力分析中的Sarma法;最后采用ANSYS/LS-DYNA软件对土岩组合边坡进行爆破模拟,对岩石材料选取随动硬化模型,土体材料选取泡沫材料模型,合理设置软件分析选项,通过单排孔、双排孔、双排孔微差爆破的模拟,得出爆破振动下土岩组合边坡稳定性状况。
[Abstract]:The problem of slope stability is a long-term research content of slope engineering. This paper aims at typical soil and rock composite slope structure and general slope excavation and blasting process. The vibration characteristics of soil rock composite slope along the direction of height and horizontal direction are simulated under the influence of blasting vibration during excavation. In this paper, the failure mechanism of explosive explosion on rock and the mechanism of vibration wave generation are introduced, and the type of vibration wave is introduced. The propagation characteristics of blasting vibration wave in medium and its influence on structure are analyzed. The similarities and differences between blasting vibration wave and natural seismic wave are compared. Secondly, the main failure forms of rock slope and soil slope are analyzed, and the possible failure forms of soil rock composite slope are analyzed theoretically, and the Sarma method in dynamic analysis is introduced. Finally, the blasting simulation of soil-rock composite slope is carried out by using ANSYS/LS-DYNA software. The following hardening model is selected for rock material, foam material model for soil material is selected, software analysis option is reasonably set, and single row hole and double row hole are adopted. The stability of soil rock composite slope under blasting vibration is obtained by simulation of double row hole millisecond blasting.
【学位授予单位】：贵州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU43;TU457

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