| 摘要: |
| 使用胶结型高聚物对粉土进行固化，研究了高聚物掺量、粉土含水率、养护龄期对固化粉土力学特性的影响及其固化机理.结果表明：高聚物对粉土具有良好的固化效果，高聚物掺量越高，粉土含水率越低，养护龄期越长，固化土的强度越高；高聚物能够有效附着在粉土表面，并填充于粉土颗粒之间，主要通过“包裹”、“填充”、“桥接”作用，减小粉土的孔隙比，提高粉土的密实度，从而提升粉土的强度和抗渗性，但在此过程中没有生成新的化合物. |
| 关键词: 高聚物 粉土 力学特性 微观机理 |
| DOI：10.3969/j.issn.1007-9629.2022.06.008 |
| 分类号:TU526 |
| 基金项目:“十三五”国家重点研发计划资助项目（2017YFC1502606）；广东省引进创新创业团队项目（2016ZT06N340） |
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| Mechanical Properties and Consolidation Mechanism of Polymer Solidified Silt Soil |
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WANG Chaojie1, LI Fengyuan1,2, GUO Chengchao2, HAO Jifeng3, ZHOU Xueyou3
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1.School of Water Science and Engineering， Zhengzhou University， Zhengzhou 450001， China;2.School of Civil Engineering， Sun Yat-sen University， Guangzhou 510275， China;3.Headwork Branch of Central Route Construction Management Bureau of South to North Water Transfer Project， Nanyang 473000， China
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| Abstract: |
| The cemented polymer was used to solidify silt soil. The effects of polymer content， silt soil moisture， and curing time on the mechanical property of the silt soil have been investigated. The solidification mechanism of polymer for silt soil was demonstrated. The results indicate that polymer has a good consolidation effect on silt soil. The strength of solidified silt soil increases with the increase of polymer content， the decrease of silt soil moisture content and the increase of curing time. Polymer can effectively adhere to the surface of silt soil and fill voids between silt soil particles. Polymer can reduce the porosity ratio and improve the compactness of silt soil， so as to improve the strength and anti-permeability of silt soil mainly through adhesion， wrapping， filling， and bridging. No new compounds are produced in this process. |
| Key words: polymer silt soil mechanical property microcosmic mechanism |
