电石灰改良盐渍土路用性能试验研究

The study of electric lime improving saline soil pavement performance

如何利用滨海地区盐渍土筑路是滨海地区高速公路建设中的关键问题。对不同配比、不同压实度的电石灰改良盐渍土进行液塑限试验、重型击实试验、CBR试验、回弹模量试验、固结试验和抗冻融循环试验,研究了电石灰掺量、压实度对电石灰改良盐渍土工程性能的影响。结果表明:随着电石灰掺量的增加,电石灰改良盐渍土的工程性能显著改善,8%的电石灰掺量是最佳掺量;8%电石灰掺量的改良土的CBR值、回弹模量、抗冻融性能均满足路基填料的要求,同时改良土的压缩模量大,因此8%电石灰改良盐渍土可以用于盐渍土区路基填筑。

How to use the inshore saline soil to build roads is a key issue in the highway construction in the coastal region.The article conducts liquid plastic limit test,heavy compaction test,CBR test,modulus of resilience test,consolidation test and anti-freeze-thaw cycle test to electric lime improved saline soil in different mix proportion and different degree of compaction,and studies the impact of electric lime dosage and degree of compaction on the engineering performance of electric lime improved saline soil.The results show that： with the increasing of electric lime dosage,the engineering performance of electric lime improved saline soil significantly improved,the electric lime dosage of 8% is the best dosage.The CBR value,modulus of resilience,freezing-thawing resisting property of 8% dosage of electric lime can meet the requirement of subgrade filling and the compression modulus of improved soil is big,so it can be used in subgrade filling in saline soil area.