工程地质学报2018，Vol.26Issue(2)：407-415,9.DOI:10.13544/j.cnki.jeg.2017-004
SH固土剂对滨海盐渍土的固化作用评价
EVALUATION OF SOLIDIFYING EFFECT OF SH AGENT ON INSHORE SALINE SOILS
摘要
Abstract
This paper studies the solidification mechanism and identificates the chemical reaction between SH agent and clay minerals.It carries out the X-ray diffraction test,infrared spectrum test,microscope and polarizing microscope observation,and scanning electron microscopy detection,respectively,on clay minerals (montmorillonite,kaolinite),quartz,saline soil and theirs solidifying one with SH agent.At the same time,in order to evaluate the effect of solidification,it carries out the mechanical tests and freeze-thaw test on solidified lime-saline soils and SH agent-lime-saline soils.The results show that XRD spectrum and IR spectrum of the solidified materials are generally consistent with one of original materials,and the mineral composition is not changed.The functional groups of SH agent are not combined with the clay minerals,and no new substance is generated.SH agent produces an elastic and three-dimensional network and the silk fills the pores,and the soil particles are bonded in a whole,which increases the strength and decreases pore ratio of solidifying saline soil.Meanwhile,because of SH agent wrapping soil particles,the adhesive force and hydrophobicity of soil particle are increased.The results of the mechanical tests on SH agent-lime-saline soil have proved that SH agent can improve the strength in air and water,deformation resistance,anti-permeability of saline soil.The results of freeze-thaw experiments confirm that the three-dimensional network and the silk can partly resist the expansion and contraction of soil during freezing and thawing,and weaken the structural damage of soil.Therefore,the addition of SH agent is helpful to enhance the freeze-thaw resistance of solidified soil.SH agent does not generate chemical reaction with clay minerals.The improvement on the mechanical properties of saline soil mainly depends on the physical effect between SH agent and soil particles.关键词
固化作用/微结构/固化土强度/滨海盐渍土/SH固土剂Key words
Solidification mechanism/Micro structure/Strength of solidified soil/Inshore saline soil/SH agent分类
通用工业技术引用本文复制引用
魏丽,柴寿喜..SH固土剂对滨海盐渍土的固化作用评价[J].工程地质学报,2018,26(2):407-415,9.基金项目
天津市自然科学基金项目(17JCYBJC22200,17JCZDJC39200),天津市科技支撑计划重大项目(15ZXCXSF00070),天津市高等学校科技发展基金计划项目(20120911)资助. （17JCYBJC22200,17JCZDJC39200）
