填海作用对海积软土的渗透性影响试验研究

以钦州港临海园区和防城港企沙工业园区填海场地海积软土为研究对象,采用机制模拟装置(一种土的浸泡荷载联动装置)模拟了海积软土赋存环境要素:填海层附加荷载应力和孔隙水化学组分离子浓度发生变化的情况;并成功地获得了人工土样。对人工土样的渗透特性及其孔隙比进行了测试研究,分析了填海层附加荷载应力和孔隙水化学组分离子浓度发生变化对人工软土样的渗透性的影响。研究表明:人工土样的e-lgk曲线近似呈直线关系;人工土样的孔隙比e和渗透系数k,随填海层附加荷载应力和孔隙水化学组分离子浓度变化而变化;填海层附加荷载应力与孔隙水化学组分两要素对人工土样的孔隙比e和渗透系数k的影响存在相互影响、相互耦合的效应。

Experimental study on coastal reclamation impact on the permeability of marine soft soil

In this paper, the research object is marine soft soil in Linhai Park of Qinzhou Port and Qisha Park of Fangchenggang Port. The marine soft soil environment factors, additional load stress of coastal reclamation layer and pore water ionic concentration changes of chemical composition, were simulated by using a soil soaking-load linkage which is mechanism simulation device. And the artificial soil samples were acquired successfully. The permeability and void ratio of the artificial soft soil samples were tested. Impact on the permeability of artificial soft soil samples was analyzed for additional load stress of coastal reclamation layer and pore water ionic concentration changes of chemical composition. Studies have shown that the following.The e~lgk curve of artificial soft soil samples is approximation linear relationship.The void ratio and permeability coefficient of artificial soft soil samples change along with the additional load stress of coastal reclamation layer and pore water ionic concentration changes of chemical composition. There is a mutual coupling effect for void ratio and permeability coefficient of artificial soft soil samples between additional load stress of coastal reclamation layer and pore water chemical composition.