考慮損傷及非飽和效應(yīng)的炭質(zhì)泥巖路堤穩(wěn)定性分析
[Abstract]:In order to analyze the stability of carbonaceous mudstone embankment under rainfall conditions, based on the Hoek-Brown criterion considering rock and soil damage and the theory of unsaturated shear strength, a stability analysis method of embankment considering damage and unsaturated effect is proposed. The rainfall infiltration process and stability of carbon mudstone embankment are studied by using this method. The results show that the proposed embankment stability analysis method has strong pertinence and practicability, and can consider the influence of damage and unsaturated effect on embankment stability at the same time. Under the condition of rainfall, the variation range of pore water pressure and the formation range of transient saturation zone are proportional to the rainfall intensity and rainfall time. In the process of rainfall, the pore water pressure on the surface of the slope increases gradually, the transient saturation zone extends from the slope to the interior of the embankment, the plastic area of the surface and interior of the embankment extends to the top of the slope along the slope and the interior of the embankment, and the safety factor of the embankment decreases gradually. After the rainfall stops, the pore water pressure on the surface layer of the slope continues to decrease, the transient saturation zone dissipates gradually from top to bottom, the surface and internal plastic areas of the embankment increase at first and then decrease, and the safety factor of the embankment decreases at first and then increases continuously.
【作者單位】: 長沙理工大學(xué)道路結(jié)構(gòu)與材料交通行業(yè)重點(diǎn)實(shí)驗(yàn)室;長沙理工大學(xué)土木與建筑學(xué)院;長沙理工大學(xué)交通運(yùn)輸工程學(xué)院;現(xiàn)代公路交通基礎(chǔ)設(shè)施先進(jìn)建養(yǎng)技術(shù)湖南省協(xié)同創(chuàng)新中心;
【基金】:國家自然科學(xué)基金資助項(xiàng)目(51508040,51508042,51578082,51578079) 長沙理工大學(xué)土木工程重點(diǎn)學(xué)科創(chuàng)新性項(xiàng)目(15ZDXK08);長沙理工大學(xué)道路結(jié)構(gòu)與材料交通行業(yè)重點(diǎn)實(shí)驗(yàn)室開放基金資助項(xiàng)目(kfj140302)~~
【分類號(hào)】:U416.12
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