Engineering Geological Characteristics of Guangxi Daxin Red Clay and Suggestions for Roadbed Disposal Measures
Research purposes:Due to the special engineering properties of red clay,it is easy to cause diseases such as slope cracking,instability,and uneven settlement of the roadbed,which greatly affects the quality,safety,and cost of the project.This article conducts detailed indoor geotechnical tests on red clay,analyzes and studies its physical and mechanical properties,and provides corresponding treatment measures and suggestions for red clay slope protection and filler utilization to guide engineering practice.Research conclusions:(1)The red clay in this area has the characteristics of high water content,high saturation,high porosity,high liquid limit,high plasticity,low compressibility,high cohesion,and weak to medium expansion.(2)As the depth increases,the water content,liquid limit,liquid index,pore ratio,and compression coefficient gradually increase,while the cohesion and compression modulus gradually decrease,forming a characteristic of upper hard and lower soft.(3)For red clay cutting,the design principle of"grading,widening the platform,and strengthening the slope toe"is proposed.(4)For the red clay filling material,it is proposed to determine the swelling property of the filling material based on the total expansion rate at 50 kpa after compaction,and to use it as roadbed filling material after edge wrapping,reinforcement,cushion setting,and inorganic binder improvement treatment.(5)The research result has certain guiding significance for the survey and design of red clay soil areas in Guangxi.
red clayengineering characteristicscuttingroadbed filling materialtreatmentimprove
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