蒙特卡洛模型在現(xiàn)代黃河三角洲淺層沉積物壓實速率模擬中的應(yīng)用
[Abstract]:In the study of consolidation and compaction of shallow sediments in the Yellow River Delta, the traditional methods are usually based on boreholes and sections to carry out local calculation and analysis. In order to overcome the limitation of uneven distribution of boreholes, it is necessary to study the compaction subsidence characteristics of shallow sediments in the whole modern Yellow River Delta area. The Monte Carlo method in mathematical geology and the stratified summation method of soil mechanics are used to simulate the compaction rate of the shallow sediments in the whole modern Yellow River Delta and the specific factors affecting the compaction simulation are analyzed. The results show that the current 90% cumulative probability (P90) of the shallow sediments varies in the range of 0.189.07mm / a, and the main factor affecting the compaction rate of the simulated sediments is the initial porosity ratio of the sediments. The compression coefficient and the average deposition rate are all positively correlated with the compaction rate, and the soft soil layer should be the main contribution layer for the compaction settlement of shallow sedimentary strata. According to the time series, the leaf flaps of different flow paths are simulated, which is more consistent with the sedimentary environment and history of the modern Yellow River Delta region, and 23 land subsidence level monitoring data are compared. The consolidation compaction component of shallow sediment is quantitatively separated, which accounts for about 13% of the total settlement.
【作者單位】： 中國科學(xué)院海洋研究所海洋地質(zhì)與環(huán)境重點實驗室;中國科學(xué)院大學(xué);
【基金】：國家自然科學(xué)基金項目(41276082)
【分類號】：P343.5;P642.26
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