Theoretical Analysis of the Influence of Bearing Plate Position on the Bearing Performance of Soil around the CEP Antipull Force Double Pile

Abstract

With the development of large-scale projects such as high-rise buildings, deep-sea platforms, bridges, etc., these construction facilities are affected by many factors such as environment and geological conditions, which put forward higher requirements for pile-bearing capacity. Compared with the straight-hole grouted piles, the CEP (concrete expanded-plate) piles have an increased bearing plate, which has stronger resistance to pullout under the action of axial tension. The location of the bearing plate is the main factor affecting the bearing capacity of a CEP pile. This study simulates and analyzes CEP double piles on ANSYS software (Ansys R19.0 versions) under ideal conditions, designs five types of model piles with different bearing plate positions, and divides them into six groups for simulation. Finally, a complete model of the two-pile system is established. It is obtained that when the bearing plate is in the same position, the longer the pile length above the bearing plate, the greater the ultimate bearing capacity of the CEP double piles; when the bearing plates of a double pile are at different positions, the antipull-force-bearing capacity of the double pile mainly depends on the pile with a smaller pile length above the bearing plate, and determines the calculation mode of a CEP double-pile antipull-force-bearing capacity at different bearing plate positions, so as to provide a theoretical basis for the design and application of CEP pile foundations in large building structures in the future.

Effects of Staggered Plates on the Uplift Failure State and Bearing Capacity of NT-CEP Pile Groups

“…At present, a large number of theoretical and experimental studies have been carried out on the bearing capacity of single NT-CEP piles and soil failure around piles, and systematic research results have been achieved, such as the influence degree of different parameters on bearing capacity [8], the research on bearing capacity calculation formula [9], etc. However, research on NT-CEP pile groups is relatively lacking, which limits the development of NT-CEP piles [10,11]. The plate position was the main factor influencing the NT-CEP pilebearing capacity, especially in the pile group layout.…”

Model Test Study on the Vertical Uplift Bearing Characteristics of Soil Continuous Solidified Pile Group Foundations

“…With more studies conducted on pile foundations, the research object has shifted from single piles to group piles. Yalcin et al [5,6] studied the bearing performance of flexible piles and small group piles under eccentric and inclined loads and noted that the ultimate bearing capacity of piles depends on the eccentricity and inclination of loads, as well as the ratio of the upper layer thickness to the pile burying depth. Wang et al [7] studied the bearing capacity of double piles under static pressure in sandy soil foundations through laboratory model tests and reported that the bearing capacity of static piles was mainly affected by the pile length and static pressure velocity, and the radial stress of piles under different pile lengths increased nonlinearly with depth and gradually converged to the passive earth pressure.…”

The Geometric Configuration of Lubricant Recesses of the Polymer Sliding Layer of the Bearing

“…Maintenance and monitoring of the condition of the structure and its load-bearing elements are performed to increase the bridge life resource [4,5]. Also, one of the options for increasing the bearing capacity and bridge service life can be the selection of rational geometry and/or location of its important elements, including the rational geometry of the sliding layer [6], location of the bearing plate of a CEP pile [7], and rational geometry of lubricant recesses [8].…”