本文選題：降雨 + 長江水位下降　； 參考：《水電能源科學(xué)》2016年06期

【摘要】：為了研究荊江河段岸坡土體的滲流特性及失穩(wěn)機(jī)理,對(duì)荊江中州子護(hù)岸工程段河岸土樣做了滲透系數(shù)和土水特征曲線室內(nèi)試驗(yàn),并基于Van Genuchten模型對(duì)土水曲線的試驗(yàn)結(jié)果進(jìn)行擬合。在獲得土體水力參數(shù)的基礎(chǔ)上,根據(jù)該河段岸坡二元結(jié)構(gòu)土體的特點(diǎn),基于飽和—非飽和滲流理論,探討了水位下降及降雨條件下岸坡不同粘性土層厚度對(duì)岸坡滲流場(chǎng)的影響規(guī)律。結(jié)果表明,地下水的下降速率隨粘性土層厚度的增加而減少;粉質(zhì)粘土層厚度越大,降雨對(duì)岸坡孔壓場(chǎng)的影響范圍也越大,且在一定程度上增大了土體的暫態(tài)飽和區(qū),不利于岸坡的穩(wěn)定性。
[Abstract]:In order to study the seepage characteristics and instability mechanism of soil on the bank slope of Jingjiang River reach, the permeability coefficient and soil-water characteristic curve of riverbank soil samples in Zhongzhou bank revetment engineering section of Jingjiang River were tested in laboratory. The experimental results of soil and water curves are fitted based on Van Genuchten model. On the basis of obtaining hydraulic parameters of soil, according to the characteristics of the soil with dual structure on the bank slope of the river, the theory of saturated-unsaturated seepage flow is used. The influence of different thickness of cohesive soil layer on seepage field of bank slope under the condition of falling water level and rainfall is discussed. The results show that the decreasing rate of groundwater decreases with the increase of the thickness of the clay layer, and the larger the thickness of silty clay layer, the greater the influence of rainfall on the pore pressure field on the bank slope, and to a certain extent, the transient saturated area of soil is enlarged. It is bad for the stability of bank slope.
【作者單位】： 河海大學(xué)港口海岸與近海工程學(xué)院;長江南京航道工程局;
【分類號(hào)】：TV223.4

【相似文獻(xiàn)】

相關(guān)期刊論文 前8條

1 本刊編輯部;;長江名勝白鶴梁露出水面[J];水電站設(shè)計(jì);1993年02期

2 黃蕙;“洪水經(jīng)濟(jì)”在洞庭湖成型 人與水重修舊好[J];w攣胖蕓，

本文編號(hào)：1940063