不同冻融循环次数下加筋固化盐渍土的强度变化规律研究  

Analysis of Mechanical Properties of Reinforced Solidified Saline Soil under Freeze-thaw Cycle

作　　者：刘子苑 朱林 刘多 王仕文 宋利文 Liu Ziyuan;Zhu Lin;Liu Duo;Wang Shiwen;Song Liwen(Hebei University of Water Resources and Electric Engineering,Cangzhou,Hebei 061000;Tangshan city fertilizer team Lubei District,Tangshan,Hebei 063000)

机构地区：[1]河北水利电力学院,河北沧州061000 [2]唐山市路北区城肥队,河北唐山063000

出　　处：《江西建材》2024年第12期36-38,共3页

基　　金：沧州市科技局课题《冻融循环下纤维加筋固化盐渍土的耐久性研究》(项目编号:222108003)

摘　　要：黄骅地区属于季节性冻土区,且土壤盐渍化严重,常出现冻胀融沉等问题。文中针对该地区盐渍土开展电石渣、粉煤灰、木质纤维素加筋固化试验,研究不同配合比下固化盐渍土的无侧限抗压强度(UCS),以及不同冻融循环次数下加筋固化盐渍土的强度变化规律。结果表明,随着胶凝材料增加,UCS呈先增加后降低的趋势。当胶凝材料占比为30%、木质素掺量为0.4%时,固化盐渍土的UCS最高。随着冻融循环次数的增加,加筋固化盐渍土的强度逐渐降低,残余强度明显高于普通固化土,即木质纤维素的掺入可有效改善盐渍土抗冻融性。Huanghua area is a seasonal frozen soil area,and soil salinization is serious,and frost heave and thaw settling problems often occur.The hardening tests of calcium carbide slag,fly ash and lcellulosic soil in this area were carried out to study the unconfined compressive strength(UCS)of the cured soil under different mix ratio and the variation of strength of the reinforced cured soil under different freeze-thaw cycles.The results showed that UCS increased first and then decreased with the increase of cementing material.The UCS of cured saline soil was the highest when the cementing material content was 30%and lignin content was 0.4%.With the increase of freeze-thaw cycles,the strength of reinforced solidified saline soil gradually decreased,and the residual strength was significantly higher than that of ordinary solidified soil,that is,the addition of lignocellulose could effectively improve the freeze-thaw resistance of saline soil.

关 键 词：加筋固化盐渍土 冻融循环 无侧限抗压强度 

分 类 号：TU528[建筑科学—建筑技术科学]