Sharp cone testing of creep properties of frozen sand

1992 ◽  
Vol 29 (5) ◽  
pp. 757-764 ◽  
Author(s):  
B. Ladanyi ◽  
J. Sgaoula
Keyword(s):  
Field Testing ◽  
Frozen Soil ◽  
Theoretical Interpretation ◽  
Creep Properties ◽  
Frozen Sand ◽  
Cone Field ◽  
Sharp Cone ◽  
Constant Axial Load

The paper describes a new field testing method, called the sharp cone test, intended for in situ determination of creep properties of frozen soils and ice. The method consists of pushing a smooth, low-angle, cone into a predrilled conical portion of a borehole. The creep properties of the material are determined by applying a constant axial load on the cone, and by observing its time-dependent axial displacement as it penetrates and enlarges the conical hole. The paper describes the test, gives its theoretical interpretation, and shows the results of a series of tests carried out in a frozen sand. Key words : frozen soil, ice, sharp cone, field testing, creep properties.

Borehole penetration and expansion devices for ice testing

1996 ◽  
Vol 23 (1) ◽  
pp. 157-164 ◽  
Author(s):  
Branko Ladanyi
Keyword(s):  
Special Kind ◽  
Strength Properties ◽  
Theoretical Interpretation ◽  
In Situ Testing ◽  
Cone Penetration ◽  
Creep Properties ◽  
Pilot Hole ◽  
Expansion Test ◽  
Sharp Cone

The paper presents two methods for in situ testing of strength and creep properties of ice, together with their theoretical interpretation and typical results. The two methods which are relatively new in this area of application, are the stress-controlled cone penetration test (CPT), and the sharp cone test (SCT). The CPT has been shown in the last few years to be an excellent tool for both ice quality profiling and ice creep and strength properties determination. The test can be used for penetrating vertically through an ice sheet, or laterally into an ice wall in a trench. The SCT is a special kind of borehole-expansion test. The method consists in pushing a smooth, low-angle, conical indentor into a predrilled conical portion of a borehole, which ends with a smaller diameter pilot hole. The creep properties of ice are then deduced from the relationship between the applied load, time, and cone penetration, which is directly related to the hole expansion. Key words: ice, creep, strength, in situ testing, cone penetration, borehole expansion, sharp cone.

Determination of creep properties of frozen soils by means of the borehole stress relaxation test

1993 ◽  
Vol 30 (1) ◽  
pp. 170-186 ◽  
Author(s):  
B. Ladanyi ◽  
M. Melouki
Keyword(s):  
Stress Relaxation ◽  
Strength Properties ◽  
Frozen Soil ◽  
Relaxation Test ◽  
Test Results ◽  
Stress Relaxation Test ◽  
Frozen Soils ◽  
Frozen Sand

The objective of this investigation was to evaluate the potential use of the borehole stress relaxation test to determine the creep and strength properties of frozen soils in situ. The paper presents the results of a series of laboratory pressuremeter relaxation tests performed in frozen sand and compares three possible interpretation methods for deducing from the test results the creep and strength parameters of frozen soils. Key words : borehole relaxation, pressuremeter, in situ testing, creep and strength properties, frozen soil.

In situ-determination of the phosphate-gradient around a root by radioautography of frozen soil sections

1987 ◽  
Vol 97 (3) ◽  
pp. 407-418 ◽  
Author(s):  
M. Kraus ◽  
A. Fusseder ◽  
E. Beck
Keyword(s):  
Frozen Soil

Erratum: Sharp cone testing of creep properties of frozen sand

1992 ◽  
Vol 29 (6) ◽  
pp. 1008-1008 ◽  
Author(s):  
B. Ladanyi ◽  
J. Sgaoula
Keyword(s):  
Creep Properties ◽  
Frozen Sand ◽  
Sharp Cone
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