两篇关于MICP处理软黏土的论文被Peng发表了，本文对引用Peng于

Two papers on the treatment of soft clay by MCP were published by Peng, and this article quotes the paper published by Peng in 2019. <br><br>The expression in the article is ambiguous. I want to express that under low stress conditions, the precipitation of carbonates in the clay has no special effect on the deformation characteristics of the soil. The compression deformation characteristics of the soil before and after treatment are almost the same. <br><br><br>The conclusion has been revised to the following points: After <br><br>MICP reinforcement, the unconfined compressive strength of the soil is increased by about 25%, and the permeability coefficient is reduced by 76%. <br>After the MICP treatment, the shear strength of the soil is improved, with its internal friction angle remaining unchanged at 22 degrees, while the cohesive force is increased from 40 kPa to 60 kPa. <br>The soil is not easy to be compressed after MICP treatment, with its compressibility index reduced from 0.225 to 0.172. <br><br>Both the mechanical test results and the XRD test results indicate that the process of microbial inducing calcium carbonate to form and strengthen the soil mainly occurred in the first 14 days. <br><br>(3) The calcium carbonate crystals between the reinforced clay aggregates are relatively small, which mainly play a bonding role and have little effect on the friction angle in the soil. <br><br>The XRD experiment results also show that the microorganisms not only induce the Ca 2+ provided in the cementing liquid to produce calcium carbonate, but also promote the Ca 2+ originally contained in the soil to produce calcium carbonate. <br><br>Added 7d and 28d soil surface bacterial colony pictures. <br><br>Under Article 20.4.4 of the Geotechnical Test Method Standard GB50123-2019, when the maximum axial stress is not obvious, the stress corresponding to the axial strain of 15% is selected as the unconfined resistance <br><br>The internal friction angle of the soil after the compressive strength has been treated by MICP remains almost unchanged, while the cohesion is significantly increased, indicating that the calcium carbonate crystals formed by the microbes between the soil particles have a cementing effect in the soil. The cohesive force has been effectively improved. However, there is almost no effect on the internal friction angle of the soil body. Because the generated calcium carbonate particles are small, the embedded bite of the soil body is weak. <br><br>(22) The soil rebound-recompression index is obtained during the unloading stage of the axial stress, which can explain the compressibility of the soil after MICP treatment.

Two papers on MIDP's treatment of soft clay were published by Peng, which cites Peng's 2019 paper.<br><br>The expression is vague, willing to express in a low-stress state, the carbonate precipitation in clay (precipitated carbonate) on the soil deformation characteristics did not have a special impact, the compression deformation characteristics of the soil before and after treatment is almost the same.<br><br>The conclusions have been revised to the following:<br><br>After MICP reinforcement, the strength of the soil without side limit was increased by about 25% and the permeability coefficient was reduced by 76%.<br>After MICP treatment, the strength of the soil's shear resistance is increased, with its internal friction angle remaining unchanged at 22 degrees, while the adhesion force is increased from 40 kPa to 60 kPa.<br>The soil is not easily compressed after MICP treatment, with its compression index reduced from 0.225 to 0.172.<br><br>Both the results of the sociological experiment and the results of the XRD experiment show that the process of microbial induction of calcium carbonate to produce reinforced soil mainly occurs in the first 14 days.<br><br>(3) The calcium carbonate crystals between reinforced clay grains are relatively small, mainly bonding, and have less effect on friction angle in soil.<br><br>The results of the XRD experiment also show that microorganisms not only induce the production of calcium carbonate by Ca 2 plus provided in the glue, but also promote the production of calcium carbonate from Ca 2 plus, which is already available in the soil.<br><br>Images of 7d and 28d soil surfaces have been added<br><br>Under 20.4.4 of the standard GB50123-2019 of the earthwork test method, when the maximum axial stress is not obvious, the axial stress is selected to become 15% corresponding stress as the pressure strength without side limit<br><br>The internal friction angle of the soil after MICP treatment is almost unchanged, and the adhesion force is obviously increased, indicating that the calcium carbonate crystals produced by microorganisms between soil particles act as glue in the soil, and the adhesion of the soil is effectively enhanced. However, there is almost no effect on the internal friction angle of the soil due to the small size of the resulting calcium carbonate particles, the soil embedded bite cooperation is weak.<br><br>(22) The soil rebound-recompression index is obtained during the unloading phase of axial stress, which can indicate the compression performance of the soil after MICP treatment.

Two papers on the treatment of soft clay by micp were published by Peng. This paper quotes Peng's paper published in 2019.<br>In the low stress state, carbonate precipitation in clay has no special effect on the deformation characteristics of soil, and the compression deformation characteristics of soil before and after treatment are almost the same.<br>The conclusion has been revised as follows:<br>After micp reinforcement, the unconfined compressive strength of soil is increased by 25%, and the permeability coefficient is reduced by 76%.<br>After micp treatment, the shear strength of soil increases, and the internal friction angle remains unchanged at 22 degrees, while the cohesion increases from 40 kPa to 60 kPa.<br>After micp treatment, the soil is not easy to be compressed, with its compression index decreased from 0.225 to 0.172.<br>The results of mechanical test and XRD show that the process of microbial induced calcium carbonate formation and reinforcement mainly occurred in the first 14 days.<br>(3) The calcium carbonate crystals between the consolidated clay particles are relatively small, which mainly play the role of bonding, and have little effect on the internal friction angle of soil.<br>The XRD results also showed that the microorganism not only induced the Ca 2 + in the cement solution to produce calcium carbonate, but also promoted the original Ca 2 + in the soil to produce calcium carbonate.<br>The pictures of bacterial colonies on soil surface of 7D and 28d have been added<br>Under the item of 20.4.4 in the standard of geotechnical test methods (GB 50123-2019), when the maximum axial stress is not obvious, the stress corresponding to the axial strain of 15% is selected as the unconfined compressive strength<br>After micp treatment, the internal friction angle of soil remains almost unchanged, while the cohesion increases significantly, which indicates that the calcium carbonate crystals formed by microorganisms between soil particles play a role in cementation, and the cohesion of soil is effectively improved. However, it almost has no effect on the internal friction angle of soil. Because the calcium carbonate particles generated are very small, the embedding and occluding effect on soil is weak.<br>(22) the rebound recompression index is obtained at the unloading stage of axial stress, which can explain the compression performance of soil after micp treatment.<br>