Engineering and Technology Journal

Dynamic displacement of sheet pile walls adjacent to the railway track

Kather A. Naji; Mohammed A. Al-Neami; Mahmood R. Mahmood

Articles in Press, Corrected Proof, Available Online from 24 April 2024

https://doi.org/10.30684/etj.2024.147388.1709

Abstract

Due to the scarcity of experimental laboratory research on the effect of repetitive stress resulting from the railway on retaining walls, this study presents an investigation of an ... Read More ... Due to the scarcity of experimental laboratory research on the effect of repetitive stress resulting from the railway on retaining walls, this study presents an investigation of an experimental laboratory model to study the effect of repetitive loads resulting from the railway on the adjacent retaining wall through several factors. The results of an experimental investigation of horizontal displacements of steel sheet pile walls behind excavations in the sand adjacent to railway tracks are presented. A series of model tests have been carried out in which the effect of sand density, horizontal distance between the railway and the sheet wall, and dynamic load amplitude on the wall horizontal dynamic displacement and its relationship to the railway dynamic vertical settlement were investigated with a load frequency equal to 2 Hz. The study examines various parameters, including different relative densities (30% loose, 55% medium, and 75% dense sand), different distances between the railway and retaining wall (0.5 H, 1 H, and 1.5 H), and variations in burden amplitudes (0.22, 0.44, and 0.66 tons). The most important factor that affects the dynamic displacement ratio (D/H) value is the relative density of the soil. The dynamic displacement ratio inversely correlates with the horizontal distance separating the railway and the retaining wall. The displacement ratio experienced a reduction of approximately 30% and 23% when the railway location relative to the retaining wall shifted from 0.5H to 1H and from 1 H to 1.5 H, respectively. The displacement ratio is directly proportional to the amplitude of cyclic live loading. Ultimately, using dense backfill soil enhances efficiency, resulting in decreased settlement of the railway and improved performance of the nearby retaining walls. It should be noted that there is a direct correlation between the horizontal movement of the wall and the vertical settlement of the rail. In the case of dense soil, these values are closely aligned.

Impact of Cooling Fluid Temperature on the Structural Integrity of Gas Turbine Stator Blades

Olumide Towoju

Volume 41, Issue 7 , July 2023, , Page 1001-1009

https://doi.org/10.30684/etj.2023.138881.1409

Abstract

The importance of gas turbine engines to the aviation industry cannot be overemphasized. Being a major part of aircrafts and jets, its reliability must be second to none. They are continuously ... Read More ...

Behavior of Single Micropile Under Different Lateral Load Rates

Mohammed A. Al-Neami; Husam H. Baqir; Saif H. Hameed

Volume 39, 2A , February 2021, , Page 167-179

https://doi.org/10.30684/etj.v39i2A.654

Abstract

This paper displays an empirical work of a micropile inserted in the dry river sand with different length to diameter (L/D) ratios (13, 15, 27, 42, and 50). The experimental work is ... Read More ...

Keywords = displacement

Dynamic displacement of sheet pile walls adjacent to the railway track

Abstract

Impact of Cooling Fluid Temperature on the Structural Integrity of Gas Turbine Stator Blades

Abstract

Behavior of Single Micropile Under Different Lateral Load Rates

Abstract