In the landslide disaster control and high slope strengthening engineering, anti-slide pile is one of trusted engineering measures, but cognition in aspect of forced state on the anti-slide pile, the pile-soil mechanism etc, which should be strengthened. Therefore, monitoring objects with three cantilever anti-slide pile entities in the loess high slope somewhere, burying monitoring instruments such as earth pressure cells and steel bar meter, for as long as 18 months of monitoring. Through analysis of monitoring results, can draw the following conclusion:①The soil pressure distribution form before the anti-slide piles is parabola-shape as a whole, whatever above the slip surface or under the slip surface the soil pressure distribution form behind the anti-slide piles is almost triangle as a whole;②The anti-slide piles construction are completed, pile-soil interaction force and reinforced by stress reaches stability in about 16 months;③A maximum soil pressure before the anti-slide piles on the ground, the soil pressure behind the anti-slide piles near the potential sliding surface;④Before the anti-slide piles and behind the anti-slide piles, reinforced by stress from pile cap to pile bottom respectively is "compressive stress and tensile stress" and "compressive stress, tensile stress and compressive stress, tensile and compressive stress of zero before pile is tensile stress value maximize after pile.
Based on the Sichuan-Tibet highway south line (Tibet border line of State Road 318 K3473+ 000-K4670+000 and K1324+000-K1473+000 National Highway 214 line) the survey results,using Midas/GTS to establish the numerical model of slope stability analysis,analysis of two slope loose accumulation effect of subgrade slope stability. In the condition of respectively change the upper and lower slope,weanalyzes the change trend of subgrade slope safety coefficient of loose body accumulation. The simulation results show that the classification of slope stability can obviously improve the slope. Compared to the the slope change for the influence of the safety factor of the upper slope, resulting in lower slope safety coefficient of slope change is more obvious.
The damage detection based on curvature mode was discussed in this paper, a three dimensional reinforced concrete simple beam model was established by finite element software, two models of before and after damage were compared also. The results showed that, before and after damage, the natural frequency, vibration modes and displacement modes had small difference, yet the curvature modes of model had great change in the location of damage.
The mechanical parameters of rock and soil has an important position in the project, the accuracy of the landslide’s mechanical parameters is very important in landslide stability, displacement forecast and prevention engineering design, compared with the laboratory tests, the in-situ tests have many outstanding advantages, the results are more according with the actual. This article through the in-situ shear test of the celadon and purplish red sandy mudstone which in zhongnan concave, detailed describes the test principle, sample preparation and test scheme, to provide a kind of strength parameters acquisition method, at the same time provide definite reference to the congeniality rock and soil.
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