含腐殖质水泥土强度影响因素的灰色关联分析

Gray Correlation Analysis of Inflence Factor on Unconfined Compressive Strength of Cement-Soil

工程地基加固效果受到土体腐殖质的影响。根据国内外腐殖质现有研究方法,开展不同水泥掺入比、不同地域水泥土对比试验,用灰色关联理论方法对腐殖质成分(HA、FA)、颗粒粒径对水泥土抗压强度影响效果的分析。结果表明:因水泥胶结作用而导致腐殖质松结态存量较小、稳结态存量增大,由灰色关联分析结果表明,稳结态富里酸较胡敏酸影响效果较大,水泥土颗粒小于0.1mm的粒径越小,对水泥土抗压强度影响效果愈强,富里酸和小于0.1mm颗粒是水泥土强度影响关键因子。腐殖质成分(HA、FA)与水泥固化剂相互作用,可减弱腐殖质对水泥固化土强度的影响效果。

The Effect of foundation solidification is influenced by soil humus.According to the existing results and methods of soil humus at home and abroad,determined the effct result of unconfined compressive strength（UCS） with the help of the gray relational analysis method for the humus and particle size,by the test of different cement dosage and different geographic comparison of cement-soil.The test indecates that the stock of loose-bound humus is discreased,the stock of stability-bound humic acid is inceased by cement cementation.By the gray correlation analysis,the effect of stability-bound ulvic acid fraction is bigger than humic acid.When the cement-soil particle size is less than 0.1mm,the smaller the particle size is,the stronger the effect of the compressive strength of cement-soil is.Fulvic acid and particle size less than 0.1mm are the key factors effecting soil-cement solidification the interation of the humus composition（HA,FA） and cement curing agent can reduce the affecting result of humus to cement.