【摘要】：利用改進的時域有限差分算法,對不同物理和幾何參數(shù)條件下各種滑坡要素組成的綜合模型進行數(shù)值模擬,研究滑帶厚度、滑帶充填介質、滑體巖土類型、滑坡裂縫等的地質雷達探測響應效果。研究結果表明,具有各自物理和幾何參數(shù)的滑坡要素與地質雷達響應特征之間存在一一對應的數(shù)學關聯(lián),通過這種關聯(lián)可以從野外實測數(shù)據(jù)中有效提取和判讀滑坡要素的類型及物理幾何特性,為滑坡穩(wěn)定性評價提供地球物理依據(jù)。為了展示該研究成果的適用性,以三峽庫區(qū)將軍灘滑坡的地質雷達野外實測數(shù)據(jù)為例進行解釋推斷,成功識別出滑坡體的滑帶埋深及分布、滑體的裂縫發(fā)育程度等情況,為評價滑坡穩(wěn)定性,合理優(yōu)化滑坡治理方案提供了科學參考。
[Abstract]:By using the improved finite-difference time-domain (FDTD) algorithm, the comprehensive model of various landslide elements under different physical and geometric parameters is numerically simulated, and the thickness of slip zone, the filling medium of slip zone, the types of landslide rock and soil are studied. The response effect of GPR detection for landslide cracks. The results show that there is a one-to-one correlation between the landslide elements with their own physical and geometric parameters and the response characteristics of the GPR. The correlation can effectively extract and interpret the types and physical geometric characteristics of landslide elements from field measured data, and provide geophysical basis for landslide stability evaluation. In order to demonstrate the applicability of the research results, taking the field measured data of the GPR landslide in the three Gorges Reservoir area as an example to interpret and infer, the slip zone depth and distribution of the landslide body and the degree of crack development of the landslide body are successfully identified. It provides a scientific reference for the evaluation of landslide stability and the rational optimization of landslide control scheme.
【作者單位】： 中國地質調查局成都地質調查中心;
【基金】：中國地質調查局項目(成渝經(jīng)濟區(qū)宜賓-萬州沿江發(fā)展帶1，

本文編號：2178946