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滨海盐渍土因土的含水率降低引起氯化钠结晶,土发生盐胀;因土的含水率增加引起盐颗粒溶解,形成孔隙,土发生溶陷;因土中含有较多的Cl-和SO42-,对钢材和混凝土具有腐蚀性;因环境湿度大及土中的Na+水化作用强烈,导致土吸湿软化。因此,在工程应用时,需采取底部铺砂砾石或土工膜等隔离或封闭措施,以控制滨海盐渍土的盐胀、溶陷和吸湿软化问题;或掺入水泥、石灰、粉煤灰和SH固土剂进行改性固化处理,以提高固化土的强度和水稳性。
Coastal saline soil due to soil moisture decreased caused by crystallization of sodium chloride, soil salt expansion; soil moisture content increased salt particles caused by dissolution, the formation of pores, soil collapse; soil contains more Cl- and SO42-, corrosive to steel and concrete; due to the high ambient humidity and soil Na + hydration, resulting in soil moisture softening. Therefore, during engineering application, isolation or sealing measures such as gravel or geomembrane at the bottom should be taken to control the problem of salt expansion, dissolution and moisture absorption and softening of coastal saline soil; or the incorporation of cement, lime, fly ash and SH curing agent modified curing treatment to improve the strength and water stability of soil.