摘要本文以风积砂为研究对象，分析了风积砂作为填筑材料的工程性质，针对风积砂失水速度过快、砂中含水量不易控制等问题，开展了外掺剂材料入渗试验、改良细砂水分迁移试验、击实和抗剪强度试验以及风积砂验证试验。试验研究发现，水玻璃和白糖的水溶液入渗速度与纯水没有明显差异，木质素、PAM、CMC和红糖作为外掺剂使用时，可以有效的减缓水溶液的入渗速率，且浓度越大，入渗速率越慢；水玻璃溶液可以有效抑制砂柱内的水分迁移，且质量比为10:1的水玻璃和木质素溶液效果最好；外掺剂的加入对细砂的工程性质没有负面影响；与改良后的室内细砂相比，改良后的风积砂水分迁移曲线斜率更平缓。87485

毕业论文关键词  风积砂  外掺剂  水分迁移

毕业设计说明书外文摘要

Title    The application of additives for the project of  aeolian sands filling dam                                     

Abstract Take aeolian sands as the object of the study, this paper analyzes the engineering properties of aeolian sands as filling material。 While, there are still several problems such as the quick seepage velocity of the water in the sands and the difficulty in controlling the water content。 A series of test is carried out to solve the problems, including the infiltration test of additives, the migration test of the water in sands, compaction and shear strength test and the proof test of aeolian sands。 It is found that the infiltration rate of the sugar aqueous solution and sodium silicate aqueous solution is almost the same with pure water, however, using the lignin, PAM, CMC and brown sugar as additives can effectively reduce the infiltration rate of aqueous solution, and the time of infiltration can be greatly influenced by the increase of solution concentration。 Sodium silicate solution can effectively restrain the seepage velocity of the water in the sand column, and adding some lignin which weighs 10% of the sodium silicate into the additive solution can be a best formula。 What’s more, the additive has no negative impact to the properties of the fine sands。 Compared with modified fine sand, the curve slope of modified aeolian sands in the migration test is more flat which means that the effect of the additive aqueous solution is more obvious。

Keywords  aeolian sands  additive  water migration

目   次

1  绪论 1

1。1  研究背景与意义 1

1。2  国内外研究现状 2

1。3  研究内容 8源-于Y优~尔^论:文.网www.chuibin.com 原文+QQ7520`18766

2  风积砂填筑渠堤 9

2。1  配水制备 9

2。2  装车运输 10

2。3  下底层补水、摊铺及补水 11

2。4  分层碾压 12

3  外掺剂入渗试验 14

3。1  试验方案 14

3。2  分组试验 15

3。3  试验结论 25

4  水分迁移试验 26

4。1  试验方案 26

4。2  正交试验 28

4。3  配方试验