Study On Rock Slope Transform Failure Mechanism And Stability In Guangyuan North Section Of 108 Highway

Traffic is very important in the west development project, so the highway construction become its first mission. As the lead of southwest economy, Sichuan plays a very important role in the developing. 108 Highway is the South and North mainline to run through middle-west area in my country, and is the main artery of west area economy developing. Guangyuan north section of 108 National Highway lies in low mountains, and its slope often is unstable.By a hundred of years development, the study on slope stability has experienced such progression: From statistic to dynamic, confirming to unconfirming, double dimensions to three-dimension and from isotropy to anisotropy. Based on current research fruits, for example 108 Highway's typical rock slope, the writer adopts the system engineering geology analysis method that become already and gradually with the geology prototype research, analyzing the mechanism cause, stability analysis calculation and engineering geology evaluation to research them.With investigation on the spot and data collection, the context proceeds to the typical slope in details of research about transform and the failure mechanism and evaluation with the stability. Its main contents includes:(1)Through studying in details the basic type and characteristic, slope constructions and its combination types of the area's rock soil, and putting forward to manage the measure reasonable, the context finds the result that this area's slope construction type is main dip slope, scarp slope and transverse slope.(2)Before studied the stability of the highway slope, it must be knowing the transform and the failure mechanism mode. Through imitated to experiment to the physics of the typical model slopes, it can be found that the K23+850's dip slope is belong to creep-sliding and fracturing, that the K47+750's scarp slope is belong to bending and fracturing, (3)it is a effective method by establishing the reasonable geology model, and proceed to study with evaluation of determine the nature and fix quantifying. With HSMR stability classification and extreme limit evaluation, K23+850 and K28+500's slope stability are very bad. They need the enlargement manayes dint degree.(4)By DEM researching the typical K23+850 and K47+750's slope, it reappears and predicts whole process of the slope transform and the failure. The process provides the dependable geology gist to manage the typical slope.