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• W2350800048 abstract "The No.6 landslide is the largest one on the route os the expressway in Zhejiang province from Shangyu to Shanmen.The landform of this region is hilly,and the height of mountains beside it is 400?m or so,and the relative elevation is 200?m.It had three ancient landslides in this region.The slope developed from balance to activation and from activation to new balance.Its geomorphic feature is same as ancient landslide and collapse′s,which like a roundbacked armchair.;The sliding mass is made up of collapsed and slope materials,ancient landslide accumulation.The main soil on the sliding zone is clayey soil containing break fragments of rock.The length of the landslide is about 600?m,its maximum thickness is 4495?m,and its volume is about 2×106?m3.It is the type of superdepth and largescale accumulation formation slide.Groundwater distribute in the landslide as the net.The groundwater embedment is shallower in the post margin and the central part.The water level changes one to two days late after precipitation.The moving speed of the ground is 05～15?mm/d in a clear day,15～35?mm/d in a rainy day.It reflects the precipitation strongly influence the landslide moving.We obtained the moving speed of the slidingsurface is 088?mm/d during observation,according to periodically monitoring the landslide moving on the depth area curve by CX03 number show grading instrucment.Combining geology analysis,we accureately judged the ltent sliding plane.;The cause of this landslide formation is effected by nature geology factors and engineering activities.Its formation mechanism is that the substance and feature of the landslide,seepage flow of groundwater and disadvantageous topography made the slope had the basic term transforming the ancient slide.Highway construction let upped the obstruction of the slide mass when obstructivepart were dig,and induce the ancient landslide resurrecting.;Strength parameters of soil in slide zone getting from laboratory test are used as the basic parameters in analysis of landslide stability,and antianalyzing exams it by the way of multisections simultaneous back calculation.We suggest strength parameters of slip plane that C equals 26?kPa and Φ equals 100°.It should be used as the basis for design to bring landslide under control.Calculating residual thrust of each cross section destination,it shows primarily drop the thrust coming from the central zone of the sliding mass.In order to adopt different preventive measures,landslide is divided into three zones:secondary slide sect,main slide sect and obstructivesect.It indicates that stability of slope is full the sensitive for rise or fall of groundwater table,according to calculating the stability in different waterlevel.;According to above analysis,considering the delaycharacter of groundwater table change,methods were brought up in order to guarantee the road side sloe stable state,such as the slope surface and subsurface dringage treatment,making multistage antisliding piles etc.Draining works were disposeed according to the different zone of the landside,setting up cutoff trence around it outside 5?m,and digging treeing drainage ditch on its surface.Landscape orientation drainage tunnel were made with crosssection 16×21?m and 305?m in length throught the bed rock under the main slide sect of the landslide.30 seepage pits were drilled in the landslidemass above the tunnel,its diameter is 15?m.A row of antisliding socketed piles were adopted that were A～D and F typical reinforced concrete piles or reinforced concrete prestressed anchor cable piles.Its cross section is 18×25?m2,2×4?m2,3×4?m2,or diameter 3?m,its length is 15～35?m.Add up to 82 roots and 62 groups piles were adopted,where 294 anchor cables were made at the top of piles and beams.After one more year of the road is open to traffic,the monitor information indicate the landslide is in the stable condition." @default.
• W2350800048 created "2016-06-24" @default.
• W2350800048 creator A5008943853 @default.
• W2350800048 date "2002-01-01" @default.
• W2350800048 modified "2023-09-28" @default.
• W2350800048 title "Stability analysis and reinforcment treatments for the No.6 Landslide on ShangyuSanmen expressway" @default.
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