摘要
为解决龙河口水库的长期渗流问题,利用最新型的聚氨酯高分子材料和快硬硫铝酸盐水泥,对龙河口水库大坝土体进行不同水泥掺量和聚氨酯浓度下的改良试验。结果显示:聚氨酯水泥浆液在合理配比下,具有较高的流动性和扩散性,凝结时间较短,可用于大坝快速注浆补强施工;聚氨酯注浆材料对于土样的强度、水稳定性、抗冻性以及抗渗性有明显的改善效果;由于水泥对聚氨酯土的既有结构会产生破坏,因此在聚氨酯浓度较低时,水泥的掺量不宜过高,或者掺入水泥之后,应适当提升聚氨酯的浓度,以保证改良土的整体性。
The latest polyurethane polymer material and rapid hardening sulphate aluminium cement are used to solve the long-term seepage problem of Longhekou Reservoir.The soil of Longhekou Reservoir dam is modified with different cement content and polyurethane concentration.The results show that polyurethane cement grout has high fluidity and diffusivity and short setting time under reasonable proportion,which can be used for dam fast grouting reinforcement construction.Polyurethane grouting material has obvious improvement effect on soil sample strength,water stability,frost resistance and permeability resistance.The cement content should not be too high when the polyurethane concentration is low due to the damage of cement to the existing structure of polyurethane soil,or the polyurethane concentration should be appropriately increased after the cement is added to ensure the integrity of the improved soil.
作者
朱俊
ZHU Jun(Anhui Longhekou Reservoir Management Office,Anhui 231360,China)
出处
《水利建设与管理》
2022年第7期49-53,84,共6页
Water Conservancy Construction and Management
关键词
龙河口水库
聚氨酯高分子材料
注浆
渗漏止水
配合比
Longhekou Reservoir
polyurethane polymer material
grouting
leakage sealing
mixing proportion
