| In the construction of western hills cities, to make full use of land resources,＂digup to down＂and＂dig mountain to valley＂ form a lot of fill engineering. Packinggenerally from near mountains excavation directly slump to valley,which contains alarge number of blasting stone and sand.Soil-rock mixtures as a sort of good packingformed by sandstone and mudstone, clay or silty clay are widely used in fillengineering,it has advantages such as high permeability, big friction coefficient, littleintensity affect by water and making full use of local materials etc In the fill projectssuch as deep valley,steep, broken rock and swamp, because of semi-filling andsemi-excavating or great height difference site conditions, can’t be layered compactionwith out large mechanical,filling is promoted by packing dump top-to down,thenripped-rock backfill soil slope is formed.The filling methods from top to down lead tolarge particle stone rolling along the slope and gather on the bottom.Most of the particlesize distribution of soil and the small gravel in the shallow,causing the whole fill blockstone uneven distribution.Density and the mechanical properties are gradual andcontinuous increase.because of the stone distribution features.Ripped-rock backfill soilhas a great difference between normal consolidation, different filling way and packingproperties make that more complicated.So ripped-rock backfill soi slope stabilityanalysis and comprehensive management became a an important topic in the mountainsconstruction.Beginning with mechanical ripped-rock backfill soil properties, slope slidetypes as well as influence factor, this paper analysis slope stability and comprehensivesupport technology,Combining with the chongqing beibei sports culture center southroad slope engineering. Main content as follows:①Ripped-rock backfill soil mechanical properties analysis. Combining with thechongqing beibei sports culture center south road slope engineering geologicalconditions, introduced the ripped-rock backfill soil Mechanical properties as well as theeffect on the stability of the slope.②Ripped-rock backfill soil slope stability analysis. Through the regular limitequilibrium method and FLAC3D numerical analysis methods, analysis slope stabilityat the special geological conditions of ripped-rock backfill soil and layered modeled todiscuss the effect on the stability of the slope.in the light of the soil-rock distributioncharacteristics. ③Comprehensive support technology and analysis. Detailedly introduce thesupport technology of ripped-rock backfill soil slope and build the FLAC3D numericalcalculation model to research the grouting reinforcement effectand regular of anchorstress.in the light of ripped-rock backfill soil particular mechanical properties.④Combining with the chongqing beibei sports culture center south road slopeengineering, analysis the safety and rationality of grouting bolt comprehensivetechnology to retain ripped-rock backfill soil slope; processing monitor the regularity ofaxial force and displacement to make sure of slope stability as well as guide theconstruction and feedback design.In the study of this paper,analysis results fits well with practical engineering andresults of numerical simulation fits well with the monitoring results. Research results ismeaningful to ripped-rock backfill soil slope stability analysis and supporting. |
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