METHOD OF CALCULATING THE BEARING CAPACITY OF PULSE DISCHARGE PILE

摘要

The method of calculating the bearing capacity of the pulsed discharge pile according to the present invention includes a perforated hole formed downwardly from the ground on which the structure is to be constructed, the perforated hole into which the rebar network is inserted, and an inner circumferential surface near the lower end of the perforated hole by pulse discharge As a method for calculating the bearing capacity of the pulsed discharge pile formed by filling and curing the mortar or concrete filling in the spherical expansion hole formed to be expanded to the outside, excavating the ground by excavating the ground to be installed the pulsed discharge pile, A sampler installation step of installing a sampler on the bottom surface of the excavation hole; A hammer falling step of hitting the sampler by freely dropping a hammer having a predetermined mass at a predetermined height from the upper end of the sampler to the upper end of the sampler; A sampler penetration step of repeatedly performing the hammer drop step to inject the sampler downward from the bottom surface of the excavation hole; A penetration depth at which the sampler is penetrated and a number of free fall of the hammer to penetrate the sampler to the depth, and a penetration resistance is determined based on the recorded penetration depth of the sampler and the number of dropping of the hammer. Resistance determination step; A saturn determination step of separating the sampler from the ground and collecting and analyzing the earth and sand inserted into the sampler when the sampler is infiltrated, and determining the saturn of the layer into which the sampler is introduced; Excavate the excavation hole to the depth into which the pulsed discharge pile is inserted sequentially in a predetermined depth unit, and the sampler installation step, hammer drop step, sampler penetration step, penetration resistance determination step, and Saturn determination step are sequentially performed for each depth unit. Determining penetration resistance and Saturn for each depth unit by performing to; And Q _u = Q _p + Q _s = q _p A _p + Σf _s A _s using the penetration resistance and Saturn obtained from the step of determining the penetration resistance and Saturn for each depth unit, and q _p = αmN. _b , f _s = α n N _s where Q _u is the longitudinal ultimate bearing force of the pulsed discharge pile, Q _p is the tip ultimate bearing of the pulsed discharge pile, and Q _s is the frictional ultimate bearing of the pulsed discharge pile where q _p is the unit tip bearing force, A _p is the tip area of the pulsed discharge pile, f _s is the unit peripheral friction, A _s is the frictional area of the pulsed discharge pile, α is the expansion coefficient, and m is 17 to 25 as the tip bearing capacity, N _b is the average penetration resistance of the tip ground of the pulsed discharge pile, n is 0.24 to 0.40 as the frictional load coefficient, and N _s is the average penetration resistance of the main surface of the pulsed discharge pile Calculate the bearing capacity of the pulse discharge pile Characterized in that it comprises a; supporting force calculating step.;Pulse discharge, pulse discharge pile, shock wave, support force, principal friction, tip support