Research Of Bridge Pile Foundation Loading Characteristic Analogue Test Method

According to the existed question analysis on SongHua river the largest bridge. And test study for its basic carry capacity. Analysis applicability and localization for different test method decide pile carry capacity. Form technique and economic ,advanced new method for simulation testing to decide pile carrying capacity.Simulation testing method is with the classical Mol-Coulomb intensity guide to bring forward to make sure pile lateral friction bigger cut testing. The testing design colligation considered stratum circumstance, made-pile arts, fact stratum compressive stress so on each factor affect, in design considered rock and soil self-stress action and pile on limit load different carrying capacity, separate determine different stratum rock shearing strength and horizontal displacement, plotting shearing strength-shearing displacement curve. Gained different stratum from pile lateral friction. The pile tip carrying capacity with triaxial compress testing model simulate pile tip stratum carrying capacity. With certain multiple discount compressive action multi-pile, base on lateral compressive and sample triaxial compress intensity plotting Mol-stress circle, obtain Mol-intensity curve, then depend on fact pile tip stratum lateral stress gain triaxial compressive intensity from curve, obtain pile tip limit carrying capacity.Comparability problem gained sufficiency embodiment in simulation testing determine pile carrying capacity, including testing and pile condition comparability, determine pile lateral friction.Cut test resemble simulate and determine pile tip carrying capacity triaxial test resemble so on three aspect. At the same time advanced three kinds to determine single pile limit carrying capacity method, base on pile among soil interaction stress three kinds to take value method, at the same time, considered pile around rock-soil tensile intensity effect, leave each other self-weight bring lateral stress , finite element evaluation produce stress, self-weight and finite element coincidence bring stress to account three kinds limit carrying capacity ,and put forward to parallel to locale study simulate test to determine single pile limit carrying capacity veracity. Simulate test methods have more excellence than tradition measure pile method.: may convenience calculate all kinds of conditions pile foot carrying capacity. If consider wash out line depth., pile vary burying depth bear the weight of force. Test periods short, test cost little , economy with reason, may receive high precision, it is capable of larger pile foundation engineering construction especially larger bridge engineering design and construction provide science bases, possess abroad application foreground.