Research on Mechanical Properties of Passive Earth Pressure of Treble-row-piles Wall Retaining and Protection Structure for Deep Excavations
Based on a new type of three-row pile supporting structure used in a dock project,combined with the geological survey report,the parameters of the formula for calculating the passive earth pres-sure in front of the pile of its typical section were analyzed by finite element analysis and elastic ful-crum method.By changing soil parameters,excavation depth,pile diameter of front row piles and other influencing factors,the ratio variation law of soil pressure before piles calculated by finite ele-ment method and elastic fulcrum method was obtained by comparative analysis and calculation.The results show that the ratio of the model calculation results of the resultant passive earth pressure to the theoretical formula calculation results is about 0.4～0.7.On this basis,the elastic fulcrum meth-od formula of soil pressure in front of three rows of piles supporting structure is improved,and rea-sonable suggestions are put forward for correcting the coefficient.The improved formula is:ps=(0.4～0.7)(ksv+ps0),and the distribution law of the coefficient is studied.
retaining and protection for excavationstreble-row-pileselastic fulcrum methodfinite element calculations
万方数据
维普
