【摘要】 主要介绍近年来重庆大学在微生物加固土方面的研究进展,包括:利用微流控技术从微细观尺度探究微生物加固土的加固机制;采用微粒固载法、温控法等工艺改进加固效果;从单元尺度对微生物加固法抑制颗粒破碎、纤维改性微生物土及钙质砂的静力、动力特性进行研究;在宏观及现场尺度方面,开展微生物注浆改性桩基础模型试验及现场地基处理试验,研究成果可为进一步推进微生物加固土技术的应用推广提供借鉴.更多还原

【Abstract】 The developed biocemented soil research in Chongqing University was introduced in this paper. The reaction process and mechanisms of microbially induced calcium carbonate precipitation(MICP) was investigated from microscopic scale based on microfluidics. The MICP with micro-particle and temperature-controlled method were adopted to improve the effect of biocementation. Restraint of particle breakage by biocementation, fiber-reinforced biocemented soil, static and dynamic performance of calcareous sands were studied form unit scale. Furthermore, precast concrete piles model test through biogrouting improvement and field foundation stabilization tests were carried out to evaluate the practical effects from macro and in-situ scales. The research at Chongqing University provides a reference for further application and promotion of biocementation geotechnical technology.更多还原