【摘要】 膨胀土是一种多裂隙并具有显著胀缩性的粘性土,它常常给工程建设造成破坏。利用人工改性的方法能够在一定程度上克服其对湿、热的敏感性。对膨胀土地基改性处理方法进行了总结和评述,目前膨胀土的改性方法可以分为物理改性法、化学改性法和生物改性法三种。物理改性法施工简单,但施工条件、适用范围有限;化学改性法从理论上讲可以根本解决膨胀土的胀缩性,是目前应用最多的改性方法,但施工情况复杂、工程费用比较高、对环境造成污染、对操作人员身体健康也有伤害等;生物改性法适用范围比较小,一般和别的方法结合使用。在系统总结前人工作的基础上展望了膨胀土地基改性处理的研究方向和发展趋势。更多还原

【Abstract】 There are much crannies in swelling soil which has remarkable swell-shrink characteristics.It generally causes breakage for engineering construction.Making use of the manual modified methods can overcome its sensitivity to wet and heat to a certain extent.The methods of modified treatment for swelling soil foundation are summarized and discussed.These methods may be presently divided into physical,chemic and biologic method.Physical modified method’s construction is simple,but the conditions of construction and applicable range are limited;chemic modified method may fundamentally resolve out the swell-shrink characteristics of swelling soil and is the most applicable modified method at present,but its construction situations are complex,engineering cost is fairly high,and it will pollute environment and damage constructors’ health,too;biologic modified method’s applicable range is fairly small and it is used with other methods in general.The studied direction and grown tendency of these modified treatment are prospected on the basis of systematically summarizing predecessors’ work.更多还原