防渗墙“柔性材料”的研制  

Development of the‘flexible material’of the impermeable wall

作　　者：包承纲[1] BAO Cheng-gang(Yangtze River Scientific Research Institute,Wuhan 430010,Hubei,China)

机构地区：[1]长江科学院,湖北武汉430010

出　　处：《地基处理》2022年第6期537-540,共4页Journal of Ground Improvement

摘　　要：三峡大坝二期深水围堰在经过一系列分析计算和研究讨论后,矛盾集中到研制一种“低弹高强”的防渗墙墙体材料上,这种材料的弹模要很低,且又必需具有一定的初期强度,这是矛盾的。经多方研究,采用先进的均匀设计理论,对配合比进行了优选;继之采用人工神经网络(简称ANN)技术建立配比与力学性质关系的模型,并制成施工现场方便应用的图表。通过在300多次室内配方试验、几项工程的现场试验、一期围堰的实际应用等多种环节,最后在二期围堰中成功应用。事实表明,这种材料具有良好的初期力学性能,施工方便、就地取材、经济性好、环境效益尤佳、后期性能趋优、还易于拆除,确是一种好材料。可在今后防渗墙、地连墙等工程中推广应用。After a series of analysis,calculation,research and discussion on the deep-water stage II cofferdam of the Three Gorges Dam,the contradiction was concentrated on the development of a‘low elastic modulus and high strength’antiseepage wall material.The elastic modulus of this material is very low,but it must have a certain initial strength,which is contradictory.After many studies,the advanced uniform design theory was used to optimize the mix ratio,then the artificial neural network(ANN)technology was used to establish a model of the relationship between the mix ratio and mechanical properties,and a chart for easy application on the construction site was made.After more than 300 indoor formulation tests,on-site pilot tests for several projects,and the practical application of the first-phase cofferdam,it was finally successfully applied in the stage II cofferdam.Facts show that this material has good initial mechanical properties,convenient construction,convenient material acquisition,good economy,excellent environmental benefits,excellent later performance,and easy removal.It is a good material and can be used in similar anti-seepage wall or diaphragm wall.

关 键 词：墙体材料 初期强度 施工现场 人工神经网络 地连墙 柔性材料 深水围堰 防渗墙 

分 类 号：TU52[建筑科学—建筑技术科学]