提水洇堤加固大堤松土层效用分析

Effect Analysis on the Dyke Soft Soil Consolidation through Irrigation Spreading and Sinking Dykes

对提水洇堤加固黄河大堤松土层试验资料的计算分析结果表明：对干密度为1．39g／cm3左右的松土层实施堤顶洇水加固时，渗流所浸润的面积仅占大堤横断面面积的65％左右，洇堤后松土层上体的干密度平均增加0．055g／cm3，最大为0．077g／cm3。洇堤期间，堤面普遍产生沉降，堤内出现空隙、漏洞和裂缝，堤坡的抗滑稳定性减小。提水汹堤不是加固大堤的根本办法。

The experimental data calculation and analysis results for the Yellow River dykes softsoil consolidation through irrigation spreading and sinking the dykes demonstrates that the sinking flow infiltrating area is only account for 65% of the dyke section to the soft soil with dry density of 1.39g/cm3 and after implementation the dry density of dykes soft soil is increased averagely by 0.055g/cm3 with maximum increase of 0. 077g/cm3. The dykes generally subside, cracks.loopholes and air gaps emerge inside, and the dykes stability for slide-resistance is decreased. Therefore,the method is not the fundamental way for dyke consolidation.