Uni-axial liquefaction wave in saturated sands

• Autorzy: Sawicki A.

Warianty tytułu

PL

Jednowymiarowa fala upłynnienia w nawodnionych piaskach

• Języki publikacji: EN

Abstrakty

EN

A compaction theory is applied to description of stress wave propagation through saturated sands, including such associated phenomena as pore pressure generation and liquefaction. Numerical examples show that liquefaction is possible during either loading or unloading, depending on the magnitude of applied stress and mechanical properties of saturated sand. It is shown that the stress wave propagates without change of shapes but produces regrouping of the intrinsic stresses in matrix and fluid, i.e. generating excess pore pressure and reducing mean effective pressure, which leads to liquefaction. Those effects are caused by permanent porosity changes due to rearrangement of the granular structure of the sand, and pore water compressibility.

PL

Przedstawiono zastosowanie teorii zagęszczania do opisu propagacji jednowymiarowej fali upłynnienia w nawodnionych piaskach. Wykazano, że upłynnienie jest możliwe zarówno podczas procesu obciążenia jak i odciążenia w zależności od wielkości naprężeń oraz od właściwości mechanicznych materiału. Pokazano, że fala globalnego naprężenia propaguje się bez zmiany kształtu. Procesowi temu towarzyszy przegrupowanie naprężeń parcjalnych w składnikach mieszaniny, tj. generowane jest ciśnienie porowe, któremu towarzyszy redukcja naprężeń efektywnych w szkielecie gruntowym. Zjawisko to prowadzi do upłynnienia nawodnionego gruntu.

Słowa kluczowe

EN

liquefaction; pore pressure; saturated soils; waves

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 1998
• Tom: nr 3
• Strony: 681--701
• Opis fizyczny: Bibliogr. 35 poz., rys., tab.

Twórcy

autor

Sawicki A.

• Institute of Hydro-Engineering (IBW PAN), Gdańsk

Bibliografia

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