高分子稳定剂改良河道岸坡表层砂土水稳定性试验研究

王琼亚; 刘瑾; 李鼎; 吴思媛; 张煜婷; 王浩楠

doi:10.13409/j.cnki.jdpme.2020.04.010

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高分子稳定剂改良河道岸坡表层砂土水稳定性试验研究

更新时间：2025-09-25

- 高分子稳定剂改良河道岸坡表层砂土水稳定性试验研究
- Experimental Study on Water Stability of Polymer Stabilized Sand on River Bank Slope Surface
- 防灾减灾工程学报 2020年40卷第4期页码：566-573
- 作者机构：
  
  河海大学地球科学与工程学院，江苏南京 211100
- 作者简介：
  
  王琼亚（1996-），女，硕士研究生。主要从事地质工程方面的研究。Email: hhu_wqy@163.com
  刘瑾（1983-），女，教授，博导，博士。主要从事环境地质工程方面的研究。Email: jinliu920@163.com
- 基金信息：
  
  国家自然科学基金面上项目(41472241);江苏省水利科技项目重大技术攻关项目(2017010);河海大学2018年大学生暑期社会实践项目(2018);中央高校基本科研业务费(2016B05914)
- DOI：10.13409/j.cnki.jdpme.2020.04.010
  中图分类号： TU443
- 收稿：2018-07-19，
  
  修回：2018-08-30，
  
  纸质出版：2020-08-15
- 稿件说明：
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王琼亚,刘瑾,李鼎等.高分子稳定剂改良河道岸坡表层砂土水稳定性试验研究[J].防灾减灾工程学报,2020,40(04):566-573.

WANG Qiongya,LIU Jin,LI Ding,et al.Experimental Study on Water Stability of Polymer Stabilized Sand on River Bank Slope Surface[J].Journal of Disaster Prevention and Mitigation Engineering,2020,40(04):566-573.
王琼亚,刘瑾,李鼎等.高分子稳定剂改良河道岸坡表层砂土水稳定性试验研究[J].防灾减灾工程学报,2020,40(04):566-573. DOI： 10.13409/j.cnki.jdpme.2020.04.010.

WANG Qiongya,LIU Jin,LI Ding,et al.Experimental Study on Water Stability of Polymer Stabilized Sand on River Bank Slope Surface[J].Journal of Disaster Prevention and Mitigation Engineering,2020,40(04):566-573. DOI： 10.13409/j.cnki.jdpme.2020.04.010.

摘要

针对河道岸坡表层砂土水稳定性问题，采用高分子稳定剂对砂土进行改良，结合浸泡崩解测试法和浸泡剪切测试法对改良砂土的水稳定性进行一系列的试验研究，并对砂土改良前后的水稳定性进行对比分析，并结合微观扫描电镜对改良机理进行分析。研究结果表明：稳定剂可以提高河道岸坡表层砂土的水稳定性。改良砂土随着稳定剂含量和密度的增大，崩解后的散开面积减少，当稳定剂含量达到0.3%时，试样呈现稳定状态。改良砂土试样在200 kPa轴向应力下的剪应力峰值整体上随稳定剂含量和密度的增加而增加。改良砂土的水稳定系数

随着稳定剂含量和砂土密度的增加而增大；当稳定剂含量大于3%时，改良砂土的稳定系数

均达到90以上。高分子稳定剂作为一种土体改良材料，与水混合后加入到砂土中，可填充砂土颗粒间的孔隙，包裹和连接砂土颗粒，形成一个整体的网状膜结构，提高砂土的水稳定性能。研究结果可为河道岸坡有效治理提供一定的参考。

Abstract

This paper aims to improve the mechanical properties of sand by using polymer soil stabilizers

and further to deal with the problem of water stability of surface sand on river slope. A series of experimental studies on water stability of the improved sand were carried out first in combination with immersion caving test and immersion shear test. Then the water stability of the sand before and after the improvement was compared and analyzed in detail. Finally

the improved mechanism was further analyzed by scanning electron microscope (SEM). Results show that polyurethane type polymer soil stabilizers can effectively improve the water stability of river slope surface sand. With the increase of stabilizer content and sand density

the dispersed area of the improved sand decreases after disintegration. When the stabilizer content beyond 0.3%

the sample presents a stable state

remaining intact. On the whole

the shear strength of the improved sand samples under a vertical confinement of 200 kPa increases as the stabilizer content and density increasing. The water stability coefficient (K) of the improved sand also shows an increasing tendency with the increase of the stabilizer content and density. When the stabilizer content exceeds 3%

the stability coefficient (K) is larger than 90. Polymer soil stabilizers is a kind of soil improvement material

which can react with water and be easily mixed with sand. Therefore

the pores between sand particles can be filled

thereby the sand particles can be wrapped and connected to form a membrane structure to improve the water stability of sand. This research can provide some references for effective treatment of river bank slope.

关键词

Keywords

references

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