【摘要】：為了解決石灰改良膨脹土最優(yōu)施工含水率現(xiàn)行確定方法存在不足的問(wèn)題,以某邊坡膨脹土為研究對(duì)象,在對(duì)現(xiàn)行石灰改良膨脹土施工控制參數(shù)常用方法分析的基礎(chǔ)上,進(jìn)行了石灰改良膨脹土的強(qiáng)度和膨脹性能的相關(guān)試驗(yàn)。研究結(jié)果表明:石灰改良膨脹土的最優(yōu)施工含水率在wop+(2%~4%)之間,石灰改良膨脹土的強(qiáng)度在7d內(nèi)增長(zhǎng)最快,以后逐漸趨于穩(wěn)定,合理地?fù)郊邮覍?duì)石灰改良膨脹土的強(qiáng)度增長(zhǎng)影響較大;隨著石灰摻量的增加塑性指數(shù)減小,自由膨脹率先減小后增大,摻石灰對(duì)膨脹土膨脹性質(zhì)的改善作用非常迅速,在最初的24h內(nèi)就已基本完成,繼續(xù)增加齡期對(duì)其影響不大。結(jié)合強(qiáng)度及膨脹性試驗(yàn)的結(jié)果,提出了以膨脹性指標(biāo)作為主要控制指標(biāo),強(qiáng)度指標(biāo)作為驗(yàn)證指標(biāo)的路基施工參數(shù)確定方法。
[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，

本文編號(hào)：2512464