Determination of the Freezing Effect on Unconfined Compression Strength and Permeability of Saturated Granular Soils

Abstract

Artificial ground freezing usage gradually rises in civil engineering applications as a soil supporting system. However, many unknown fundamental parameters have been still waiting discovery, especially for granular soil. Granular soil can not carry its own weight during unconfined conditions. If water turns to ice that locates in the soil pores, it proceeds as a cementitious material. First step of design phenomena is to identify the material properties in geotechnical engineering. Within this scope, unconfined compression tests (UCC) and permeability tests are performed on frozen granular soils subjected to 1, 3 and 7 day-freezing periods to observe time effect. Experimental procedure are applied totally on 12 sand and gravel type of specimens with saturated cases after freezing application in the CDF/CIF freezing thawing machine. Stressstrain behaviors, ultimate load capacities and permeability of specimens are determined. This method will be used while taking undisturbed granular soil samples from the construction site.

Experimental Study of the Mechanical Behavior of Frozen Soils - A Case Study of Tabriz Subway

“…Many researchers have studied AGF and its effects on soil properties and mechanical behavior of frozen soils [20][21][22][23][24][25][26][27][28][29]. However, compared with unfrozen soils a greater effort is required to study frozen soils [30][31][32][33].…”

Evaluation of petroleum hydrocarbons contamination in soils and groundwater using electrical resistivity and hydrochemical methods-Case study: Ayetoro, Osogbo southwestern Nigeria

“…The values of coefficients of permeability obtained may be influenced by (1) textural properties (i.e., pore size/ grain size, grain size distribution, the shape of grains and packing of grains), ( 2) gas slippage, (3) amount distribution and type of clays, (4) type and amount of secondary porosity, (5) overburden pressure, (6) reactive fluids, and (7) highvelocity flow effects. The coefficient of permeability determined in this work was compared with the standard coefficient of permeability values of soil Evirgen et al (2015). This showed that the host of the PHCs is composed of silty clay.…”

Evaluation of the causes of flexible pavement failure; case study of Enugu/Port-Harcourt expressway

“…For sample 1, the average of the two values obtained was 8.03×10 -7 , and for sample 2, the average of the two values obtained was 8.19×10 -7 . These values obtained are indicative of clay, according to standard chart of permeability coefficient for various soil types [19].…”