派酶固化土无侧限抗压强度与土粒分形特征的关系研究  

Relation of soil granule fineness fractal dimension and unconfined compression strength of soil stabilized by Perma-Zyme

作　　者：彭红涛[1] 郭亮 彭一江[3] 

机构地区：[1]中国农业大学,北京100083 [2]大连高新技术产业园区社会事业管理局,辽宁大连116025 [3]北京工业大学,北京100124

出　　处：《土木工程学报》2010年第S1期588-592,共5页China Civil Engineering Journal

基　　金：中央高校基本科研业务费专项资金(2009-3-11);"十一五"国家科技支撑计划(2008BADC4B03)

摘　　要：应用土粒按粒级质量分布的细度分维计算方法,根据土粒的机械组成实验分析结果,计算出4种土的细度分维。通过实验发现,在风干养护条件下,粗砂土、细砂土、面砂土、砂壤土掺加派酶的无侧限抗压强度均比不掺的高;在研究范围内(每千克土中派酶掺量0.015~0.045 ml),随着派酶掺量的增加,7d、28d无侧限抗压强度增加趋势的逐渐变缓。依据实验数据,分析7d、28d无侧限抗压强度与土粒质量分布的细度分维和派酶掺量关系的拟合模型;对该模型的三维图的分析表明,土粒的细度分维对派酶固化土7d、28d无侧限抗压强度的影响比派酶掺量更显著;派酶固化土7d、28d无侧限抗压强度随土粒的细度分维的增加(D=2.2466~2.5031),分上升、波动和急剧上升三阶段,总体呈非线性上升趋势。The fractal properties of four types of soils were investigated with a calculation method of soil granule fineness fractal dimension on the basis of accumulative mass distribution of soil particle and experimental results.The results show that coarse sandy soil,fine sandy soil,very fine sandy soil and coarse sandy soil stabilized by Perma-Zyme are with higher unconfined compression strength than those without Perma-Zyme,under air drying condition.In the study scale of per kg soil with 0.015ml^0.045ml Perma-Zyme,increased the added volume of Perma zyme,7d and 28d unconfined compression strength also increased but got increasing slowly.The 7d and 28d unconfined compressive strength regression models were chosen and analyzed based on experimental data.It was found that the soil granule fineness fractal dimension had more effect on 7d and 28d unconfined compression strength than the volume of Perma-Zyme by the 3D plots of equations.7d and 28d unconfined compression strength increased as soil granule fineness fractal dimension increased from 2.2466 to 2.5031.The tendency of increation is nonlinear and has 3 sections(increasing,fluctuating,increasing sharply).

关 键 词：派酶 无侧限抗压强度 细度分维 

分 类 号：U414[交通运输工程—道路与铁道工程]