Experimental study on the bearing characteristics of screw grouting piles using transparent soil model
Since its inception,screw grouting piles have been widely used in engineering,but research on their bearing characteristics mainly focuses on vertical pull-out and compression resistance,with less research on their bearing characteristics under horizontal and combined loads.This article was based on indoor transparent soil model experiments and non-invasive measurement PIV(particle image velocimetry)technology to study the bearing characteristics of screw piles and straight rod piles under vertical uplift load,horizontal load,and combined vertical and horizontal loads,as well as the displacement field of the soil around the pile.The load-displacement curves and displacement vector diagrams of screw piles and straight rod piles under different directions of load were obtained.The analysis results show that the vertical pull-out bearing capacity of screw piles is about 32％higher than that of straight rod piles with equal diameter,and the displacement control of screw piles is stronger than that of straight rod piles under the same load conditions.When subjected to horizontal loads,there is no significant difference in the horizontal bearing capacity and displacement control ability between screw piles and straight rod piles.When subjected to combined loads,the bearing capacity of screw piles is greater than that of straight rod piles,and the displacement changes of the soil around the piles will weaken the horizontal bearing capacity of the foundation.The squeezing and interlocking effect of the screw teeth on the soil around the screw pile is the main reason why the bearing capacity and displacement control ability of this pile type are higher than those of straight rod piles of the same size.
万方数据
维普
