Investigation of operation of newly designed anchor pile

Abstract

The article describes design of a pile with new rotary anchors for foundations of buildings operating on variable loads or on heaving soils. The results of plate load tests on piles’ pressing in with one- and two anchor levels are presented. Based on calculations on bearing capacity of piles of proposed design, the adequacy of data on determination of its bearing capacity obtained by experimental method is calculated. Bearing capacity of anchor piles for pulling out is determined by calculations. Anchors located at one level at the height of pile increase its bearing capacity for pressing in by 20%, and increase it for pulling out by 94%. Anchors located at two levels at the height of pile increase bearing capacity of pile for pressing in by 60%, and increase bearing capacity for pulling out by three times. A decrease in the settlement of pile of proposed design is determined by the results of plate load tests on pressing in and it amounts to 85% for a pile with one-level anchors and to 94% for a pile with two-level anchors.

Research on the Analytical Conversion Method of Q-s Curves for Self-Balanced Test Piles in Layered Soils

“…Equation ( 5) is substituted for Equation (2). The settlement w bs at the lower pile toe caused by the side shear stress of n units in the pile body can be calculated as Equation (6).…”

“…In order to ensure the safety and reliability of pile foundations, the bearing capacity test of the pile foundation is essential [1][2][3]. The traditional methods for static load testing of foundation piles mainly include the vertical compressive pile load method and anchor pile method [4][5][6][7], the high-strain method for dynamic testing of pile bearing capacity [8,9], the probability analysis model, which predicts and evaluates the accuracy of the single-pile bearing capacity [10][11][12], and the finite element approach of numerical simulation of the pile foundation [13][14][15]. However, a novel technique for evaluating the bearing capability of foundation piles is the self-balanced test pile method.…”