Single Pile Settlement and Load Transfer Mechanism due to Excavation in Silty Clay
Journal Title: Engineering, Technology & Applied Science Research - Year 2018, Vol 8, Issue 1
Abstract
In densely built areas, development of underground transportation system often involves excavations for basement construction and cut-and-cover tunnels which are sometimes inevitable to be constructed adjacent to existing piled foundations. In order to gain new insights into single pile responses (i.e. settlement and load transfer mechanism) to an adjacent excavation in saturated silty clay, a three-dimensional coupled- consolidation numerical analysis is conducted in this study. An advanced hypoplasticity (clay) constitutive model with small-strain stiffness was adopted. A linear increase in pile settlement was observed due to excavation-induced stress release. This is because part of the pile is placed within the boundaries of a major influence zone due to excavation-induced ground movement. Based on a settlement criterion, apparent loss of pile‘s capacity is 14%. A maximum bending moment of about 350 kNm is induced in the pile with the maximum deflection of 28 mm. In addition, mobilisation of shear strength at the pile-soil interface was found to be a key factor governing pile-soil-excavation interaction. During excavation, a downward load-transfer mechanism in the piles can be identified.
Authors and Affiliations
M. A. Soomro, K. F. Memon, M. A. Soomro, A. Memon, M. A. Keerio
Keywords
Related Articles
- EP ID EP155969
- DOI -
- Views 204
- Downloads 0
On Some Unsolved Problems of Mathematica
In this paper, some unsolved problems of the Mathematica software package are documented. At first, it is shown, using a number of examples, that the processing (simplification) of rational-fractional expressions involvi...
Developing Situation of Tea Harvesting Machines in Taiwan
In recent years rapid social change and industrial and commercial development in Taiwan has lead to migration of rural labor, population ageing, high wages and labor shortages, which resulted in significant problems for...
Interaction of Rupture Zones of Adjacent Anchor Plates in an Analogical Medium
In this paper, an experimental study which required the design and implementation of a model containing plastic granules powder to simulate a natural environment, is presented. The latter is subjected to the removal of "...
Modeling and Parameter Optimization for Surface Roughness and Residual Stress in Dry Turning Process
The influence of some turning variables and tool overhang on surface roughness parameters and residual stress induced due to machining 6061-T6 aluminum alloy is investigated in this paper. Four input parameters (cutting...
Implementation of an Optimized Steganography Technique over TCP/IP and Tests Against Well-Known Security Equipment
Nowadays we are witnessing a total convergence towards a digital world where information is digitized, conveyed and processed using highly developed techniques and tools. The development of broadband networks, including...