Abstract
The treatment and utilization of silt have always been a difficult problem in the field of engineering construction. Because of its high natural moisture content, low permeability and strength, rheological property and rich organic matter, the silt soil cannot be directly used in engineering practice. Under this background, in order to further explore the dynamic characteristics of solidified silt under dynamic load, a shallow mud along the coast of the Pearl River Delta in Guangdong Province was used as raw material, inorganic liquid solidifying agent and 32.5 ordinary Portland cement as solidifying agent. The dynamic characteristics of silt and solidified silt with age of 7 days and 28 days were studied by means of dynamic triaxial tests. The loaded samples were analyzed by SEM in laboratory. The experimental results show that the dynamic characteristics of the solidified silt soil under dynamic load are much better than that of the remoulded soil, and the solidification effect of the solidified silt soil with an age of 28 days is more obvious. The results can be applied to practical engineering practice.
Highlights
The pearl river delta in China has a developed water system with a large amount of deep silt
The dynamic characteristics of undisturbed silt, solidified silt of different ages under the action of different stress levels and different cycles were analyzed, and the test samples after the action of different stress levels were observed by scanning electron microscope
In this paper, based on the dynamic characteristics of the silt soil under the action of dynamic load caused by train, analyzes the different stress level and different cycles under the action of undisturbed silt soil and the change trend of different ages of the solidified mud soil strain
Summary
The pearl river delta in China has a developed water system with a large amount of deep silt. The traditional treatment methods of silt soft soil foundation are mainly consisted of riprap, compaction and silting, excavation and replacement [1]. SHUO JIANG relationship between the stress level of soil under dynamic load and the maximum strain, and analyze the change law of cumulative deformation of soil under the action of changing cycle times [4]. In this experiment, the dynamic characteristics of undisturbed silt, solidified silt of different ages under the action of different stress levels and different cycles were analyzed, and the test samples after the action of different stress levels were observed by scanning electron microscope. The dynamic action rules of undisturbed silt and solidified silt at different ages under macro and micro conditions are established
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