STW型生态土壤稳定剂改性膨胀土水理性质试验研究

坡面冲刷是膨胀土边坡常见的坡面失稳形式之一,坡面防护对膨胀土边坡的稳定十分重要。对自主研发的STW型生态土壤稳定剂改性膨胀土的水稳性、浸水强度、抗冲刷性等水理性质进行了试验研究,利用扫描电镜方法初步分析了其改性机理;开展了现场试验对STW型生态土壤稳定剂在膨胀土边坡坡面防护中的应用进行了可行性研究。试验结果表明:STW型生态土壤稳定剂改性膨胀土的水稳性和浸水强度得到了显著提高,抗冲刷性能得到了明显增强;减少了水土流失,促进了表层固化,提高了坡面稳定的防护效果。

Water-physical properties of expansive soils modified by STW ecotypic soil stabilizer

The surface erosion of expansive soil slope was a kind of common phenomena,so the slope surface protection was an important way to keep the slope stability.A series tests were performed on the water stability,saturated strength,erosion resistance of the expansive soils modified by the STW ecotypic soil stabilizer.The modified mechanism was analyzed using Scanning Electron Microscope(SEM).The field examination was carried out to explore the feasibility of STW stabilizer for the slope surface protection.It was indicated that the water stability,saturated strength,and erosion resistance of the modified expansive soil were obviously improved;the losses of soil and water from the slopes decreased greatly and the slope stability was enhanced.