微生物减饱和法处理液化地基研究进展

Research progress of liquefiable foundation treatment using microbial induced desaturation

土体液化是导致岩土工程震害的主要原因之一,由于传统处理方法在成本、适用性等方面的限制,大量既有建筑和新建工程地基未能得到有效的抗液化处理,地震液化灾害潜在风险不断聚集。减饱和是提高土体抗液化强度的有效方法,微生物减饱和法具有环境友好、处理方式灵活等优势,其涉及微生物、环境、岩土等多学科领域,是当前微生物岩土技术的前沿性课题。对微生物减饱和作用机理、减饱和土体性状及稳定性等研究现状进行了总结分析,并对未来研究工作的方向作出了展望。

Soil liquefaction is deemed as one of the critical causes of the seismic damage in geotechnical engineering.Because of the high cost and poor serviceability of traditional handling approaches,foundations of numerous existing buildings and greenfield projects have not been effectively treated against liquefaction,and the potential risks of earthquake-induced liquefaction disasters are accumulated.It is concluded that desaturation is an efficient way of reinforcing liquefiable ground,the microbial induced desaturation process has such advantages as environmental friendly and flexible handling and involved in multi-disciplinary fields such as microbiology,environment and geotechnical,which is the subject in the frontiers of research on microbial geotechnical technology.In this paper,the mechanism of microbial induced desaturation and the property and stability of desaturated soil were studied moreover future research interests were also expected.