Study On Compaction Properties And Embankment Settlement Forecasting Of Silty Soil

Most soil of the Hengyang-Yanlin highway in Hengdong of Hunan province are part of granite's offspring under the efflorescence, this kind of soil is composed of sand grains and silts, but is short of clay, has the poor compaction properties; simultaneously, as Hunan province is in the south's moist heat regions, the soil contains much water what makes the embankment to moulding. At the present time, there are many researches about compaction methods of silt and wind blown sand in and abroad, but be shortage of the silty soil. So those are important to seek for the compaction properties of silty soil in the Hunan province, to draw up the suited compaction standard of silty soil embankment for intensity, rigidity stability and wear of the embankment, to research CBR properties of silty soil what is full of water and to summarize its suitable vibrating compaction parameters and roller compaction technics of silty soil what is full of water in Hunan province, to try to exert all it's compactness for saving soil's mending cost.This paper searches the compaction properties of the silty soil, and summarizes the suitable vibrating compaction parameters and recognizes the compaction mechanism of embankment deeply to support the theory basis and technique backing for the road design and construction control in the silty soil region. Concretely, this paper has following search profits:(1)The paper searches the compaction properties and the CBR properties of silty soil full of water, proposes the compaction control of the moist silty soil and expands the pratical scope of the moist fine-grained soils compaction control in the standard.(2)The paper leads the uniform design to arrange compaction plan of the embankment compaction, and solves the design problem of several factors test.(3)The paper draws up the suitable compaction technics of silty soil full of water, and solves the compaction difficulty of the silty soil embankment.(4)The paper searches the influence of vibrating to the soil on the basis of summarizing the founded compaction theories, and recognizes the vibrating compaction properties deeply combining with the silty soil's properties.(5)The paper builds up the combination models with the several targets model of the accuracy norm of the forecasting effective measure to forecast the settlement of the silty soil embankment to enhance the forcasting precision on the basis of searching the settlement forecasting of the silty soil embankment.