Abstract
The technology of bio-grouting is a new technique for soft ground improvement. Many researchers have carried out a large number of experiments and study on this topic. However, few studies have been carried out on the dynamic response of solidified sand samples, such reducing liquefaction in sand. To study this characteristic of microbial-strengthened liquefiable sandy foundation, a microorganism formula and grouting scheme is applied. After grouting, the solidified samples are tested via dynamic triaxial testing to examine the cyclic performance of solidified sand samples. The results indicate that the solidified sand samples with various strengths can be obtained to meet different engineering requirements, the use of bacteria solution and nutritive salt is reduced, and solidified time is shortened to 1-2 days. Most importantly, in the study of the dynamic response, it is found that the MICP grouting scheme is effective in improving liquefiable sand characteristic, such as liquefaction resistance.
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Han, Z., Cheng, X. & Ma, Q. An experimental study on dynamic response for MICP strengthening liquefiable sands. Earthq. Eng. Eng. Vib. 15, 673–679 (2016). https://doi.org/10.1007/s11803-016-0357-6
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DOI: https://doi.org/10.1007/s11803-016-0357-6