Study On Deformation Characteristics Of Fluvioglacial Deposits Filling Sub-grade

Based on the engineering the actual construction of the national highway network, theChengdu-Chongqing region link Leshan-Ya’an section, The fluvioglacial deposits fillerapplicability for research purposes, borrow geotechnical centrifuge model test technology andanalysis of Finite element numerical and theoretical and other research tools, research theapplicability of "sandwich method " construction method of fFluvioglacial deposits filling andrationality. Main contents of this paper:1. In order to rationally evaluate properties of fluvioglacial deposits filler along Leshanto Ya’an highway, Select representative sections carry out monitoring studies of the testsection;2. Fluvioglacial deposits by centrifugal model test soil "sandwich method" sub-gradedeformation characteristics study, the settlement characteristics of fluvioglacial deposits"sandwich method" of sub-grade;3. Use MIDAS-GTS model, to carry out a series of numerical simulation analysis, toanalyze and forecast the settlement characteristics of fluvioglacial deposits as roadbed filling,and proves the rationality of "sandwich method" construction method;4. Based on the model test, numerical analysis, on-site testing structure, it demonstrationand compare various sub-grade settlement prediction method，for fluvioglacial depositssub-grade filling characteristics, puts forward the reasonable post-construction settlementprediction method;5. To carry out experimental work of speed detection method based on the quality offluvioglacial deposits compaction, feasibility of construction the "sandwich method" offluvioglacial deposits filling are demonstrated.