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原文传递 Effect of Proximity of Sheet Pile Walls on the Apparent Capacity of Driven Displacement Piles, Phase 2: Final Report, Task 3 Deliverable.

题名：	Effect of Proximity of Sheet Pile Walls on the Apparent Capacity of Driven Displacement Piles, Phase 2: Final Report, Task 3 Deliverable.
作者：	Chung, J.; Krauthammer, T.; Mishra, N.; Taylor, A.
关键词：	Pile driving, Soil mechanics, Sheet Pile Walls (SPW), Bearing capacity, Dislocation (Geology), Resistance (Mechanics), Recommendations implementation, Numerical simulation
摘要：	This Phase 2 report continues research investigating the effects that installation and removal of sheet pile walls (SPWs) have on driven piles founded in granular soils. The method of analysis employed in Task 5 of Phase 1 of this project are extended to model systems involving a driven pile in proximity to two SPWs forming the corner of a closed rectangular cofferdam. Numerical simulations are presented which employ a combined Finite Element Method-Discrete Element Method (FEM-DEM) procedure which explicitly capture the mechanical behavior of the pile-soil-SPW system. Three relevant physical scenarios are studied, with a top-down load test following: (1) Pile driving into sand; (2) SPWs installation one at a time followed by pile driving into sand; and, (3) SPW installation, pile driving, and subsequent SPW removal one at a time in reverse sequence. The Davisson and ultimate capacities of the driven pile are therefore assessed in the presence of a driven SPW cofferdam, as well as in a soil from which the SPW structure has been recently removed. The response of the pile is shown to be dependent on geometrical parameters of the system; a parametric study is therefore performed with respect to the ratio of SPW cofferdam embedment depth versus the embedment depth of the pile. The components of total resistance are studied with respect to the pile’s tip resistance and side friction; the relationships of these components to the presence or removal of the SPWs at various embedment depths are recorded. The results are condensed into a series of simple design charts which quantify the effects of the SPW cofferdam in scenarios 2 and 3 on the bearing capacities of the pile. Recommendations for the use of these graphical tools are presented for the easy quantification of these influences for the engineer facing relevant design decisions.
报告类型：	科技报告