Study On The Stabilization Method Of Silts For Roadbed And Slope In Nantong Area

Silts has many weakness in silty subgrade in Nantong area,such as diffculty crushing,low strength,low stabilization and so on.The subgrade slope is easy to destroy because of erosion.Based on the analysis of physical and mechanical property,the author make a systemic research on subgrade and its slope using SEU soil stabilizer.The main results are concluded in what follows:1.This paper sest forth formative reason and physical and mechanical property of silts in Nantong area.consolidating,makes a primary study for principles of SEU soil stabilizer.Because of intermingling high charge hydronium and improving the PH scale of soil liquer,the SEU-1 stabilizer advance the capability of silts. Account for the consolidating principles of SEU-2 stabilizer form componential effect and microcosmic structure and free moisture's translation.2. The laboratory tests and analysis of stabilizer show: The SEU-1 stabilizer advance the unconfined strength and cohesion and water stability of silts. It is successful in the capacity of resisting erosion of subgrade slope. By analysing the physical and mechanical property and electrical property and PH scale,the excellence of SEU-2 stabilizer is advancing early strength.Meanwhile,the author research on the related strength curves about different hour and stabilizer amount.3. The erosion commencing conditions and the relations between erosion capacity and erosion influence are analysed and studied.According to river dynamical theory the numerical model of erosion on subgrade slope is developed in this paper.A model of AESE-ANN is proposed and established to assess the slope erosion stability.The erosion amount and rainfall intension are discussed.4.The SEU stabilizer reinforceing silts experience in locale and laboratory shows that three dimensions net with 5% SEU-1 stabilizer leveling off subgrade slope and 4% SEU-2 stabilizer strengthen subgrade are well.The precision erosion decrease amount can be evaluated by the index ofλfor subgrade slope.5.The author research on the realition of stress strain of uniaxial and triaxial stress, giving the constitutive model of hyperbola and softening curve and Duncan—Chang.The parameters are calculated and the models are validated.