Advanced Cone Penetrometer Development for In-Situ Testing at Gullfaks C

1987 ◽  
Author(s):  
J.M. Bayne ◽  
T.I. Tjelta
Keyword(s):  
Cone Penetrometer ◽  
In Situ Testing

scholarly journals Instrumented Impact Cone Penetrometer

1973 ◽  
Vol 10 (3) ◽  
pp. 397-409 ◽  
Author(s):  
Umesh Dayal ◽  
John H. Allen
Keyword(s):  
Field Tests ◽  
Strength Properties ◽  
Experimental Program ◽  
Cone Penetrometer ◽  
Test Results ◽  
In Situ Testing ◽  
Penetration Mechanism ◽  
Side Friction ◽  
Local Side

The present paper describes the development of an instrumented impact cone penetrometer for a direct measurement of in situ strength properties of a soil target. The developed penetrometer, in addition to providing acceleration signatures (as obtained by previous investigators), is capable of recording cone thrust and local side friction simultaneously and continuously. The procedures have been outlined for estimating in situ strength properties and soil type of the target materials throughout the penetrated depth from the output records of these sensors. Typical test results generated from an on-going experimental program aimed at providing the data for (1) understanding the penetration mechanism, (2) development of penetration theory, and (3) designing the penetrometer for field tests, i.e. in situ testing of ocean floor soils, are also presented.

Piezo-friction-cone penetrometer testing in soft clays

1987 ◽  
Vol 24 (4) ◽  
pp. 645-652 ◽  
Author(s):  
J.-M. Konrad
Keyword(s):  
Pore Pressure ◽  
Water Pressure ◽  
Testing Procedure ◽  
Soil Conditions ◽  
Cone Penetrometer ◽  
In Situ Testing ◽  
Soft Clays ◽  
Tip Resistance ◽  
Full Design

A comprehensive in situ testing program using a 50-kN electric piezo-friction-cone penetrometer was carried out at three different sites in soft marine clays. In these soils, the measured penetration resistance and friction are less than 4% of the full design capacity of the load cells. Although the strain gauges are temperature compensated, the importance of temperature effects in these soil conditions is demonstrated. The paper outlines a testing procedure to minimize the errors associated with zero shift in cone testing and to obtain meaningful data in weak soils with 50-kN penetrometers.Pore-water pressure measurements along the shaft are essential to evaluate the in situ test results in soft soils. Pore pressure distribution along the shaft is dependent on soil type, and measurements should be made at both ends of the friction sleeve for complete soil characterization.Friction along the shaft is not uniform and is negligible over an initial length of about 2 cone diameters in soft clays. Key words: soft clays, pore pressure, friction, tip resistance, in situ testing.

scholarly journals In situ strength characterisation of peat and organic soil using full-flow penetrometers

2011 ◽  
Vol 48 (7) ◽  
pp. 1085-1099 ◽  
Author(s):  
N. Boylan ◽  
M. Long ◽  
F.A.J.M. Mathijssen
Keyword(s):  
Organic Soil ◽  
Cone Penetrometer ◽  
Uniform Measure ◽  
In Situ Testing ◽  
Strength Parameters ◽  
Resistance Factors ◽  
Fibrous Peat ◽  
Penetration Tests ◽  
Range Of Values

Full-flow penetrometers have been shown to overcome problems experienced with the cone penetrometer when measuring resistance in very soft peat and organic soil, and give a much more uniform measure of resistance than the cone in fibrous peat. However, at present there is no guidance on the interpretation of strength parameters in these soils using the T-bar and ball. This paper examines the results of tests using these devices at two research sites in the Netherlands in conjunction with high-quality Sherbrooke sampling for laboratory testing. In fibrous peat, the T-bar and ball provided a more uniform measure of resistance with a lower degree of scatter than the cone. The in situ testing results have been compared with the laboratory tests to assess the range of resistance factors relating penetration resistance to the undrained shear strength (su) and have been shown to occupy a lower range of values than the cone penetrometer. However, penetration tests in these soils are likely to be influenced by partial drainage effects and this should be considered during testing and the subsequent interpretation of results. Recommendations are made for the use of full-flow penetrometers to obtain strength parameters in these soils.

scholarly journals Chromium bioavailability in aquatic systems impacted by tannery wastewaters. Part 2: New insights from laboratory and in situ testing with Chironomus riparius Meigen (Diptera, Chironomidae)

2019 ◽  
Vol 653 ◽  
pp. 1-9 ◽  
Author(s):  
B.J.D. Ferrari ◽  
D.A.L. Vignati ◽  
J.-L. Roulier ◽  
M. Coquery ◽  
E. Szalinska ◽  
...  
Keyword(s):  
Chironomus Riparius ◽  
Aquatic Systems ◽  
In Situ Testing

In Situ Testing and Evaluation of Moisture Content in Existing Sub-Grade

2010 ◽  
Author(s):  
Jinsong Qian ◽  
Xin Qiu ◽  
Jianming Ling
Keyword(s):  
Moisture Content ◽  
In Situ Testing ◽  
Testing And Evaluation

In-situ testing

2019 ◽  
pp. 255-301
Author(s):  
Jonathan Knappett ◽  
R. F. Craig
Keyword(s):  
In Situ Testing
Sign in / Sign up

Export Citation Format

Share Document