因此25%含水率被在本文中综合选取作为实验含水率。MICP具有明显的环

Therefore, 25% moisture content is comprehensively selected as the experimental moisture content in this article. <br>MICP has obvious environmental protection significance compared with traditional cement and soil solidification technology. <br><br>The experimental basis can be provided by the experiments in this article for subsequent engineering application research on MCP strengthening soft clay. <br>The 14d-age specimens showed obvious strain hardening characteristics during the loading process of 0-15% strain. <br><br>The strain-softened soil generally has a maximum stress peak before the strain reaches 10%. In this paper, the 14-d-age soil sample has a peak at about 20% strain, which is quite different from the normal strain-softened soil. <br><br>The author believes that the stress drop may be caused by the following reasons: the soil sample has a certain degree of eccentric deformation after being loaded to 20% strain, resulting in a slight decrease in the axial stress, which leads to the peak stress. <br>However, since the stress drop occurs after 20% strain, the stress value at 15% strain is selected as the unconfined compressive strength of the soil according to the GB50123-2019 standard. Therefore, the unconfined compressive strength of the soil sample is not influences. <br><br>In this paper, the damage of clay is described as ballooning failure, and the damage of sand is described as shear failure, which is mainly based on the images of soil damage obtained from actual experiments. <br><br>The soil damage patterns obtained from the experiments in this paper show obvious bulging damage patterns; according to the soil damage pictures in the paper by Cui et al. and their description of the sand damage patterns in the paper, it can be explained that there are many soil damage patterns in the sand. It is shear failure.

Therefore, 25% water content is selected in this paper as the experimental water content.<br>MICP has obvious environmental significance compared with traditional water and soil curing technology.<br><br>The experimental basis can be provided by the experiment for the subsequent engineering application of MIDP reinforced soft clay.<br>The 14d-age sample showed obvious strain hardening characteristics during the loading process of 0-15% strain.<br><br>The soil softened by strain generally has the maximum stress peak before the strain reaches 10%, and the 14d-year-old soil sample in this paper peaks at about 20% strain, which is completely different from the usual strain softening soil.<br><br>The author thinks that the stress decrease may be caused by the following reasons: the soil sample after loading to 20% strain appears a certain degree of eccentric deformation, resulting in a slight decrease in axial stress, which leads to peak stress.<br>However, since the stress decrease occurs after 20% strain, and in this paper according to GB50123-2019 standard to choose 15% strain stress value as the soil without side limit pressure strength, therefore, the soil sample without side limit pressure strength value is not affected.<br><br>The destruction of clay is described as ballooning damage, and the destruction of sand is described as shear damage, mainly based on images of soil damage obtained from actual experiments.<br><br>The soil destruction form obtained in this paper shows obvious pattern of drumming destruction, and according to the pictures of soil destruction in Cui and other papers and their description of the soil destruction form in the paper, it can be shown that the soil destruction form in sand is mostly shear damage.

Therefore, 25% water content is comprehensively selected as experimental water content in this paper.<br>Micp has obvious environmental protection significance compared with traditional cement soil solidification technology.<br>The experimental basis can be provided for the following research on the application of micp in soft clay reinforcement.<br>The results show that the strain hardening characteristics of the 14 d specimens are obvious during the loading process of 0-15% strain.<br>In general, the maximum stress peak appears before the strain reaches 10%, while the peak value appears at about 20% of the strain in the 14 day old soil sample, which is quite different from the normal strain softening soil.<br>The author thinks that the stress drop may be caused by the following reasons: after the soil sample is loaded to 20% strain, the eccentric deformation occurs to a certain extent, which leads to the slight decrease of axial stress, which leads to the appearance of peak stress.<br>However, the stress drop occurs after 20% strain, and the stress value at 15% strain is selected as the unconfined compressive strength of soil according to the standard of GB 50123-2019, so the value of unconfined compressive strength of soil sample is not affected.<br>In this paper, the failure of clay is described as bulging failure, and the failure of sand is described as shear failure, which is mainly based on the images of soil failure obtained from actual experiments.<br>According to the pictures of soil failure in Cui's paper and their description of sand failure form in the paper, it can be concluded that the failure mode of soil in sand is mostly shear failure.<br>