Emergency Management

Emergency Management

Analysis of PM4Sand Constitutive Model by Comparing Geotechnical Methods for Stabilization of Sheet Pile Quay Walls in Liquefiable Soil

Document Type : Original Article

Authors
Mohammad Hosein Bakhshaee 1
Freidon Khosravi 2
1 MSc in Marine Structures, Faculty of Civil Engineering, Imam Hosein University (AS), Tehran, Iran
2 Prof., Faculty of Civil Engineering, Imam Hosein University (AS), Tehran, Iran
Abstract
The vast expanse of coasts in iran is affected by many faults and has a high seismic potential. Most of coastal lands consist of very loose soils with the risk of liquefaction. In the present study, the seismic behavior of the anchored sheet pile quay wall, which regardless of the risk of liquefaction, is buried in the loose liquefiable layer, has been numerically analyzed using PLAXIS software and the PM4Sand constitutive model. The soil in front of the root of the sheet pile (sea side) is the most prone area for liquefaction due to the low initial vertical effective stress level. The presence of a loose layer around the root of the sheet pile, due to the liquefaction of the soil in front of the root and the lateral pressure of the soil behind the sheet pile, leads to the rupture of the buried part. Soil-cement is one of the methods of improving loose coastal soils, which increases adhesion and reduces the liquefaction potential of saturated loose soils. Improving the soil around the root of the sheet pile on the sea side using the soil-cement method greatly reduces the proportion of excess pore water pressure, displacement and bending anchor of the sheet pile. The comparison made with the corresponding past research shows that soil-cement improvement with less time and volume of execution than the compaction method has a better performance in stabilizing anchored sheet pile quay wall affected by the loose liquifiable layer.
Keywords
Anchored Sheet Pile Quay Wall
Seismic Stability
Numerical Analysis
Liquefaction
Soil-Cement Improvement Method
Subjects

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  • Receive Date 02 October 2024
  • Revise Date 10 January 2025
  • Accept Date 29 January 2025