郑向华,袁伟,罗运祥,成聪
ZHENG Xianghua,YUAN Wei,LUO Yunxiang,CHENG Cong

• 1:成都工业学院智能制造学院
• 2:四川省地质工程勘察院集团有限公司
• 3:西南交通大学机械工程学院

摘要(Abstract)：

分层抽水试验是水文地质勘探的重要技术内容。针对传统分层抽水管外止水方法效率低、可靠性及可控性差等难题,利用聚丙烯酸钠树脂的高吸水特性,开发了遇水膨胀橡胶,提出一种基于遇水膨胀橡胶的管外止水新方法,并采用响应面法对该新方法进行了优化研究。以吸水膨胀率为响应指标,通过Box-Behnken试验设计构建代理模型,探究不同工艺、工况参数及其交互作用对橡胶吸水膨胀性能的影响,达到优化工艺、预测工况的双重目的。结果表明:遇水膨胀橡胶的最佳工况和工艺参数组合为水溶液pH值7.0、吸水时间136 h、聚丙烯酸钠添加量61份、改性芳纶短纤维添加量4.5份。最后,研制了基于遇水膨胀橡胶的管外止水装置,经试验验证了所提方法的可行性,对地下水资源勘探利用具有工程应用价值。
Stratified pumping test is a key technique for hydrogeological exploration. To solve the problems of low efficiency and poor reliability and controllability of the traditional water-sealing methods outside casing for stratified pumping, a water-swelling rubber was developed based on high water absorption of the sodium polyacrylate resin, and a new approach based on water-swelling rubber was proposed and optimized by the response surface methodology in this paper. With the water swelling ratio of the rubber as response index, a surrogate model was constructed by the Box-Behnken experimental design to study the influence of different process parameters, working condition parameters, and their interaction on the water-swelling performance. Furthermore, the preparation process of water-swelling rubber was optimized and its working condition was predicted. Optimization results indicate that the optimum combination of working conditions and preparation process parameters of water-swelling rubber includes aqueous solution at pH 7.0, water absorption time of 136 h, sodium polyacrylate 61 phr, and modified aramid short fiber 4.5 phr. Finally, the water-sealing device outside casing was developed, and the feasibility of the proposed method was verified through experiments, which has engineering value for the exploration and utilization of groundwater resources.

关键词(KeyWords)： 分层抽水;管外止水;遇水膨胀橡胶;吸水膨胀率;响应面法;代理模型
stratified pumping;water sealing outside casing;water-swelling rubber;water swelling ratio;response suface methodology;surrogate model

Abstract:

Keywords:

基金项目(Foundation): 中国地质调查局地质调查项目(DD20190128);; 成都工业学院校级科研项目(理工科重点)(2019ZR011)

作者(Author): 郑向华,袁伟,罗运祥,成聪
ZHENG Xianghua,YUAN Wei,LUO Yunxiang,CHENG Cong

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