摘要
堰塞体通常具有组成成分复杂、结构松散、稳定性差、抗渗透性能弱等特点,特别是位于水下部分的岩塞体,其防渗加固处理材料及工艺还不完善。针对堰塞体改良处理需求,以改性砂浆流动性为控制标准,开展正交试验,优选出三组具有不同流动性和水下抗分散性的砂浆配合比,根据室内试验结果,定量评价了各配合比水下抗分散性、力学强度及防渗性能。通过开展室内模型试验,研究了改性砂浆对于水下砂砾石的灌浆工艺及固结效果,检验了改性砂浆对于堰塞体改良处理的适用性和有效性,可为类似工程处理提供借鉴和参考。
The landslide dam body is characterized by complex material composition,loose and disordered structure,poor stability and weak anti-permeability. Especially for the landslide dam located in the underwater part,the antiseepage and reinforcement technology and materials are not perfect. According to the needs of improving landslide dam,taking the fluidity of modified mortar as the control standard,orthogonal test was carried out,and three groups of mix proportion with different fluidity were selected. Based on the results of laboratory test,dispersion resistance underwater,mechanical properties and anti-seepage performance of each mix proportion mortar were evaluated quantitatively. Through the model test,the grouting effect of modified mortar for underwater sand-gravel with certain gradation is studied,it is verified that the modified mortar can meet the application requirements of different working conditions of the landslide dam,and can provide reference for similar engineering construction.
作者
周建华
赵卫全
赵明华
路威
ZHOU Jianhua;ZHAO Weiquan;ZHAO Minghua;LU Wei(China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Beijing IWHR Corporation,Beijing 100044,China;Sinohydro Foundation Engineering Co.,Ltd.,Tianjin 301700,China;Enterprises Key Laboratory of Foundation and Foundation Engineering of Tianjin,Tianjin 301700,China)
出处
《水利与建筑工程学报》
2021年第5期68-73,共6页
Journal of Water Resources and Architectural Engineering
基金
国家重点研发计划项目(2018YFC1508504)
堰塞坝改良加固专用技术与装备研发
天津市科技计划项目(20YDLZSN00280)。
关键词
堰塞体
防渗加固
改性砂浆
正交试验
高流动性
landslide dam
anti-seepage reinforcement
modified cement mortar
orthogonal test
high fluidity
