Research For The Stability Of The Granite Residual Soil High Slope With Prestressed Anchorage From Shantou-Meizhou Highway

Based on abundant fieldwork and data research ,this article educes the geology model of the granite residual soil slope and comes to the conclusion that the granite residual soil slope is different from common sand soil or cohesive soil slope about the destroy form because there are various primary structure planes which are anisotropic.The destroy form of the granite residual soil slope is mainly plane ,another is arc.Directed by above-mentioned theory and linking the prestressing anchorage engineering of the granite residual soil slope from Shantou-Meizhou highway in Guangdong province, this article put forward reasonable design advice about framework bridgingWertical beam distance,ancho rage force compensating tensioning time,anchorage length etc. by the test of framework counter force, framework beam inner force, anchorage prestressing force etc, and also calculates the stability modulus before\after anchorage by slice method and ultimate balance theory.The conclusion is that the anchor rope's mechanics influence can be neglected in the granite residual soil slope and anchorage force will lost in the course of spread in the soil. So this article inductsδ1 andδ2 prestressing reducing modulus when calculating sliding force and skid-resisting force, attains the more reasonable stability modulus under the condition of different reducing moduli.