【摘要】：以分析高地溫隧洞環(huán)境對(duì)襯砌混凝土性能的影響規(guī)律為目標(biāo),采用高地溫濕度養(yǎng)護(hù)箱模擬高地溫隧洞中的溫濕環(huán)境,進(jìn)行襯砌混凝土的養(yǎng)護(hù),利用均勻設(shè)計(jì)的試驗(yàn)方法獲得較為全面的試驗(yàn)數(shù)據(jù),通過(guò)回歸分析得到不同養(yǎng)護(hù)齡期的回歸方程,歸納出溫度、水膠比、砂率三個(gè)主要因素對(duì)襯砌混凝土單軸抗壓強(qiáng)度的影響規(guī)律。結(jié)果表明:通過(guò)回歸方程,溫度、水膠比及砂率均可找到一個(gè)最優(yōu)值(如水膠比為0.42、砂率為45%、養(yǎng)護(hù)溫度為57℃)使得襯砌混凝土的單軸抗壓強(qiáng)度達(dá)到最大值;隨養(yǎng)護(hù)溫度的升高,最大襯砌混凝土單軸抗壓強(qiáng)度對(duì)應(yīng)的水膠比及砂率均有所增大,如養(yǎng)護(hù)齡期為28 d時(shí),水膠比為0.31(養(yǎng)護(hù)溫度55℃)、0.52(養(yǎng)護(hù)溫度115℃)。因此,混凝土養(yǎng)護(hù)溫度較高時(shí),應(yīng)適當(dāng)增大水膠比及砂率。
[Abstract]:In order to analyze the influence of the environment of highland temperature tunnel on the performance of lining concrete, the high ground temperature and humidity curing box is used to simulate the temperature and humidity environment in the highland temperature tunnel, and the lining concrete maintenance is carried out. Through regression analysis, the regression equations of different curing ages are obtained, and the temperature and water-binder ratio are summed up. Influence of three main factors on uniaxial compressive strength of lining concrete. The results show that through regression equation, temperature, water-binder ratio and sand ratio can find an optimum value (such as water-binder ratio of 0.42, sand ratio of 45, curing temperature of 57 鈩，

本文編號(hào)：2246358