关键词: 嵌岩桩, 承载变形特性, 数值分析

Abstract: The bearing capacity of rock-socketed pile is usually large, and it is difficult and expensive to obtained to the ultimate state on the field tests. The data obtained from the field tests are hard to reflect the bearing capacity and deformation of the rock-socketed pile. Based on the data of field tests at Wuhan Lvdi Center, ABAQUS finite element method is used to analyze the bearing capacity and deformation of the rock-socketed pile, which including the property of rock, depth-diameter ratio of the rock-socketed pile, and the upper soil covering. The numerical analysis shows that based on the reasonable constitute model, and the reasonable parameter value, the calculation results of FEM is consistent to the field measurements. The numerical analysis shows that, the above mentioned influencing factors are all important to the rock-socketed piles. The rock property and the depth-diameter ratio of socketed pile has little influence on the side friction of the upper soil covering. Bearing capacity of rock-socketed part is the main components of the bearing capacity of the whole pile; while to the pile with deep upper soil, the side friction of upper soil covering is a very important part of the bearing capacity of rock-socketed pile.

Key words: rock-socketed pile, bearing capacity and deformation, numerical analysis