Nondestructive Testing And Evaluation Technology Of The Valley-type Soft Foundation Reinforcement

Valley-type soft foundation widely distributed in the valleys, and has thecharacteristics of its own.the usual experimental method is generally time-consumingthefor reinforcement effect testing,and nondestructive testing method has obviousadvantages; Soft foundation reinforcement effect evaluation can’t simply to severalindicators to illustrate their quality of qualitative level, the fuzzy comprehensiveevaluation method can more than comprehensive index system for some generation face,comprehensive effective evaluation of soft foundation reinforcement of the regionallevel.Through to analysis the theory of GPR and high-density electrical method, can usethe GPR and high-density electrical method to detect the soft foundation treatmenteffect. And use the GPR and high-density electrical method to Chongqing to Suininghighway toll soft foundation reinforcement effect the detected on site and theexperimental result, such as fuzzy mathematics to base on the theory of fuzzy theoryand analytic hierarchy process to their combining, set up Chongqing to Suining highwaytoll soft foundation reinforcement effect level of fuzzy comprehensive evaluation modeland concluded:①Analysis the relationship of the GPR detecting depth, medium density and theelectromagnetic wave propagation characteristics, can use different frequency of theantenna of different depth detection of soft foundation reinforcement effect. theSIR-3000GPR uses100MHz frequency antenna detection results show that, using thegeological radar detection within15m the compactness of soft foundation, the precisionand resolution are can meet demands.②According to the moisture content on the medium of resistivity influencing theprinciple, high density resistivity method can detect soft foundation treatment aftercertain depth within the scope of the moisture contents of roadbed and whether there arepotential sliding surface. use high density resistivity detection system of the softfoundation treatment effect detection results show that the effect is obvious.③According to nondestructive testing field experiment results and the interiorconclusion, put forward the soft foundation reinforcement effect of comprehensiveevaluation index system, determined the soft foundation reinforcement effect ofcomprehensive evaluation standard, through to the fuzzy comprehensive evaluationmodel of the son of the membership degree and factors comments general objective comments membership and comprehensive value coefficient calculation, judgment anda main highway chongqing toll strengthening soft foundation treatment comprehensivelevel is higher.