Research On Reliability Of High-filled Slope Soil Plastic Deformation Stability Of South-to-north Water Transfer Project

With the development of social economy, the population has continued toincrease, the water resources supply and demand imbalance contradictions havebecome increasingly prominent, the shortage of water resources are a direct threat tothe natural ecological environment, but also hindered the development of economyand society. The total amount of water resources in China is abundant, but itsdistribution is not uniform, showing a more in the southeast northwest less situation;annual distribution is relatively concentrated, mostly concentrated in the summer, thewinter generally arid few rain; interannual variation is relatively large; the seriousimbalance of water and soil resources combination.In order to alleviate thiscontradiction, in the50’s of last century, our country put forward the concept of "southto North Water Transfer Project", and gradually planned three water diversion lines,from the Yangtze River water diversion, to adapt to the need of the development ofnorthwest, north around the. The south to North Water Diversion Project is an interbasin water transfer project is an oversize, large basic measure to solve the waterproblem and the establishment of the north of our country, the project receivedworldwide attention. In the process of water transfer, water channel terrain influencedmany canal fill channels, these high fill full fill, canal, resembling a huge section ofAboveground River, and soon the conveying flow before far from consolidationsettlement, the channel is stable and reliable become the key to safe operation of themain canal. This paper is carried out around this theme.The paper takes a section of main canal of the middle route of South to NorthWater Diversion Project of high fill water channel as the research target, the researchof high filled channel in the mechanism of deformation and failure of the completionof phase and water phase, and on this basis, analyzed the deformation stability underdifferent working conditions of the fill slope.High filled channel stability analysis methods can be divided into many,qualitative analysis and quantitative analysis. Method in this paper is the applicationof quantitative analysis method, using the limit equilibrium theory, analyzes thestability of the high embankment slope of the completion of the slope and wettingperiod in the case of construction. The subject of the first application of Mohr-Kuluntheory and probability theory to calculate the minimum CK soil cohesion and plasticity reliability indexes of soil, plastic deformation of high fill slope in cohesivesoil and their influence on the stability of slope is studied. Secondly, usingGEO-studio software (SLOPE/W, SIGMA/W two module) on the deformation andstability of slope is simulated and analyzed.Through the software simulation, in thedeformation analysis, seen from the simulation results can be, the three conditions ofhorizontal displacement with water phase of the maximum value, the maximumdeformation. In the stability analysis, in the stability analysis, the software to analysethe slope, using the general limit equilibrium method (Morgenstern-Price method,Bishop method and Janbu method) are calculated and analyzed, and the finite elementmethod and the results of comparative analysis, safety factor of application of theabove four methods to calculate1/3design depth condition less than the safetycoefficient of full water period and completion period. Calculated by the results of thefour methods of safety coefficient is greater than1, shows that the three conditions arein a stable state.