石灰改良膨胀土路基施工控制参数
发布时间：2019-07-09 21:30
【摘要】：为了解决石灰改良膨胀土最优施工含水率现行确定方法存在不足的问题,以某边坡膨胀土为研究对象,在对现行石灰改良膨胀土施工控制参数常用方法分析的基础上,进行了石灰改良膨胀土的强度和膨胀性能的相关试验。研究结果表明:石灰改良膨胀土的最优施工含水率在wop+(2%~4%)之间,石灰改良膨胀土的强度在7d内增长最快,以后逐渐趋于稳定,合理地掺加石灰对石灰改良膨胀土的强度增长影响较大;随着石灰掺量的增加塑性指数减小,自由膨胀率先减小后增大,掺石灰对膨胀土膨胀性质的改善作用非常迅速,在最初的24h内就已基本完成,继续增加龄期对其影响不大。结合强度及膨胀性试验的结果,提出了以膨胀性指标作为主要控制指标,强度指标作为验证指标的路基施工参数确定方法。
[Abstract]:In order to solve the problem of deficiency in the current method for determining the optimal construction moisture content of lime modified expansive soil, the strength and expansion performance of lime modified expansive soil were tested on the basis of the analysis of the common construction control parameters of a certain slope expansive soil. The results show that the optimal construction moisture content of lime modified expansive soil is between wop (2% 鈮，
本文编号：2512464
[Abstract]:In order to solve the problem of deficiency in the current method for determining the optimal construction moisture content of lime modified expansive soil, the strength and expansion performance of lime modified expansive soil were tested on the basis of the analysis of the common construction control parameters of a certain slope expansive soil. The results show that the optimal construction moisture content of lime modified expansive soil is between wop (2% 鈮，
本文编号：2512464
本文链接：https://www.wllwen.com/kejilunwen/jiaotonggongchenglunwen/2512464.html
