麦秸秆加筋滨海盐渍土的加筋效应及工程应用问题

Reinforcement Effect and Engineering Application Problems of Littoral Saline Soil Reinforced with Wheat Straw

滨海盐渍土具有溶陷性、盐胀性、腐蚀性和吸湿软化性等不良工程性质,工程应用前,需对其进行改性与补强处理.依据传统的理论和现有的实验资料,探讨了麦秸秆加筋滨海盐渍土的加筋效应及加筋土的力学性能.试验结果表明:在相同条件下,掺加适量麦秸秆的加筋盐渍土的力学性能优于素盐渍土.试验结果证实了在麦秸秆加筋土中,加筋效应是由加筋材料与土之间的摩擦力提供的,它改变了土的应力应变性能,使土的抗压强度、抗剪强度和抗变形能力显著提高;麦秸秆适宜作加筋材料,加筋滨海盐渍土可用于填筑路堤.同时也指出了麦秸秆在工程中的应用及未来需解决的问题.

Littoral saline soil,with such poor engineering properties as collapsibility,dilatability,erosion and hygro-scopic softening,has to be modified and strengthened before its engineering application.According to the traditional theory and the existing experimental data,the reinforcement effect and mechanical property of the saline soil rein-forced with wheat straw are discussed in this paper.The experiment result shows that under the same condition,the mechanical property of the saline soil reinforced with the proper amount of wheat straw is better than that of the normal saline soil.The experiment result proves that in the saline soil reinforced with wheat straw,due to the friction between the reinforcing material and the soil,the stress and strain properties of the soil have been changed,and the comprehension strength,the shearing strength and the non-deformability of the soil have been markedly enhanced,and that wheat straw is suitable to be used as the reinforcement material and the littoral salinesoil reinforced with wheat straw can be used as embankment filling.Meanwhile,the application of wheat straw to engineering and the problems to be solved are pointed out.