石灰改善土灰剂量衰减曲线探索与思考（Lime improved soil lime attenuation and exploration thinking curve）.docVIP

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石灰改善土灰剂量衰减曲线探索与思考（Lime improved soil lime attenuation and exploration thinking curve）.doc

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石灰改善土灰剂量衰减曲线探索与思考（Lime improved soil lime attenuation and exploration thinking curve）

石灰改善土灰剂量衰减曲线探索与思考（Lime improved soil lime attenuation and exploration thinking curve） Exploration and thinking of lime to improve soil ash dose attenuation curve Andyruina (Jiangxi traffic engineering supervision company, Nanchang 330008) Abstract: through the grey dose measurement in Anhui Province Ma Wu Highway Subgrade of lime improved soil in the construction of the existing value of the dispute caused by the calcium and magnesium content determination and analysis of indoor test changes with time, the dose of lime with time presents new concept of linear attenuation relationship, in order to make the construction time of soil improved by lime and control. To guide the ash dosage of lime soil construction qualified judgement. Key words: road engineering; grey dose measurement and analysis; new concept of linear attenuation of grey dose with time; grey dose determination 0 Preface Ma Wuhu expressway is the main channel of the cities along the Yangtze River in Anhui Province, leading to the developed cities of Jiangsu, Shanghai and so on. It is a big channel to communicate with the southeast coast of China and the midwest. The width of pavement design 28m two-way 4 lane design speed of 120km/h, located in plain and hilly area, the soft soil foundation, the surrounding soil is more expansive soil with high liquid limit, the water content in 18%-25%, can not be used directly as roadbed filler in roadbed, zone 95 should be used only after improvement, according to the design requirements of ash dosage were 5%, 5%, 7%, and 10%, according to the 4 layer construction, each layer thickness is 20cm. 1 lime to improve soil construction requirements 1.1 raw materials Soil: soil construction usually has certain requirements for the soil plasticity index (15-20), should be in between, because the soil plasticity index is bigger, the strength of mixture is also higher, the mixture is easily compacted, but the crushed soil and sandy soil group, no pulverization but difficult co