基于脲酶诱导碳酸钙沉积固化土体的研究进展

诱导碳酸钙沉积的土体固化是近年来岩土工程领域新兴起的新型环保地基处理技术， 该技术利用产脲酶菌的微生物诱导碳酸钙沉积（Microbially Induced Calcite Precipitation，即MICP技术）或基于脲酶的酶诱导碳酸钙沉积（Enzyme Induced Carbonate Precipitation，即EICP技术），将松散的土体颗粒胶结成为整体，达到提高土体抗剪强度的目的。与MICP技术相比，EICP技术不存在生物安全风险，无需考虑是否有氧，且可适用于更小粒径土体的处理，因此具备广阔的实际工程应用前景。文章从脲酶类型与来源、EICP固化土体处理方法及EICP固化土体强度增长等方面，对近20年基于脲酶诱导碳酸钙沉积固化土体的研究进行了回顾与总结。

Review on the Enzyme-Induced Carbonate PrecipitationBased on Soil Stabilization

Abstract：Carbonate precipitation based on soil improvement is an environmentally friendly ground treatment technology that emerges in geotechnical engineering in recent years. This technique utilizes the urease-producing bacteria (termed as MicrobiallyInduced Calcite Precipitation, MICP) or urease enzyme (named Enzyme Induced Carbonate Precipitation, EICP) to hydrolyse ureaand induce the precipitation of cementing calcium carbonate, which can bond loose soil particles together and thus enhance soilstrength. Compared with the MICP method, the EICP method is free from issues related to bio-safety and oxygen availability, andcan be used to treat soils with finer particles. Therefore, the EICP method is promising for applications in practical engineering.This study presents a review on the enzyme-induced carbonate precipitation based on soil stabilization from the aspects of typeand sources of urease enzyme, soil treatment methods with the EICP approach, and the strength enhancement of EICP treated soil.