基于均匀设计的高地温隧洞衬砌混凝土抗压强度影响规律研究

发布时间：2018-09-17 15:35

【摘要】：以分析高地温隧洞环境对衬砌混凝土性能的影响规律为目标,采用高地温湿度养护箱模拟高地温隧洞中的温湿环境,进行衬砌混凝土的养护,利用均匀设计的试验方法获得较为全面的试验数据,通过回归分析得到不同养护龄期的回归方程,归纳出温度、水胶比、砂率三个主要因素对衬砌混凝土单轴抗压强度的影响规律。结果表明:通过回归方程,温度、水胶比及砂率均可找到一个最优值(如水胶比为0.42、砂率为45%、养护温度为57℃)使得衬砌混凝土的单轴抗压强度达到最大值;随养护温度的升高,最大衬砌混凝土单轴抗压强度对应的水胶比及砂率均有所增大,如养护龄期为28 d时,水胶比为0.31(养护温度55℃)、0.52(养护温度115℃)。因此,混凝土养护温度较高时,应适当增大水胶比及砂率。
[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，

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