加筋秸秆改良硫酸钠盐渍土强度特性研究

Study on Strength Characteristics of Sodium Sulfate Saline Soil Improved by Reinforced Straw

盐渍土路基存在遇水强度降低问题,文中采用了加筋秸秆改良硫酸钠盐渍土研究强度特性,通过击实试验和直剪试验,发现沸石能够提高盐渍土的压实特性,而麦秸秆的加入可以增强盐渍土的力学强度。结果表明,硫酸钠含量对击实特性影响较大;沸石含量对素土和盐渍土的击实特性影响呈正相关,最大干密度受沸石含量影响较小;麦秸秆加筋率小于4%时能明显改善沸石改良盐渍土的抗剪特性。

There is a problem of reducing the strength of saline soil roadbed when encountering water.In this paper,reinforced straw was used to improve the strength characteristics of sodium sulfate saline soil.Through compaction and direct shear tests,it was found that zeolite can improve the compaction characteristics of saline soil,while the addition of wheat straw can enhance the mechanical strength of saline soil.The results show that the amount of sodium sulfate has a strong influence on the compaction properties.The effect of zeolite content on the compaction properties of plain and saline soils is positively correlated,with the maximum dry density being less affected by the amount of zeolite.The shear resistance of zeolite modified saline soils can be significantly improved when the ratio of wheat straw reinforcement is less than 4%.