Effects of pore-water salinity on soil identification using in situ cone penetration tests

2021 ◽  
pp. 106252
Author(s):  
Yongfeng Deng ◽  
Haochen Xue ◽  
Yongxin Wu ◽  
Tongwei Zhang ◽  
Zilong Wu ◽  
...  
Keyword(s):  
Pore Water ◽  
Water Salinity ◽  
Cone Penetration ◽  
Cone Penetration Tests ◽  
Pore Water Salinity ◽  
Penetration Tests

scholarly journals Using CPTs to derive thermal properties of soil

2020 ◽  
Vol 205 ◽  
pp. 04005
Author(s):  
Philip J. Vardon ◽  
Joek Peuchen
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Laboratory Tests ◽  
Field Investigation ◽  
Volumetric Heat Capacity ◽  
Cone Penetration ◽  
Cone Penetration Tests ◽  
Penetration Tests ◽  
Properties Of Soil

A method of utilizing cone penetration tests (CPTs) is presented which gives continuous profiles of both the in situ thermal conductivity and volumetric heat capacity, along with the in situ temperature, for the upper tens of meters of the ground. Correlations from standard CPT results (cone resistance, sleeve friction and pore pressure) are utilized for both thermal conductivity and volumetric heat capacity for saturated soil. These, in conjunction with point-wise thermal conductivity and in situ temperature results using a Thermal CPT (T-CPT), allow accurate continuous profiles to be derived. The CPT-based method is shown via a field investigation supported by laboratory tests to give accurate and robust results.

Interpretation of cone penetration tests. Part II: Clay

1983 ◽  
Vol 20 (4) ◽  
pp. 734-745 ◽  
Author(s):  
P. K. Robertson ◽  
R. G. Campanella
Keyword(s):  
Shear Strength ◽  
Friction Angle ◽  
Companion Paper ◽  
Deformation Characteristics ◽  
Cone Penetration ◽  
Cone Penetration Tests ◽  
Cone Penetration Testing ◽  
Personal Experiences ◽  
Penetration Tests

This paper is the second of two parts and presents a summarized work guide for practicing engineers for interpretation of parameters for undrained conditions during the cone penetration test such as, undrained shear strength, overconsolidation ratio, and deformation characteristics of clay. The advantages, use, and interpretation of the piezometer cone are also discussed. Factors that influence the interpretations are discussed and guidelines provided. The companion paper, Part I: Sand, considers drained conditions during the test and summarizes interpretation of parameters such as relative density, friction angle, and deformation characteristics of sand. The authors' personal experiences and current recommendations are included. Keywords: static cone penetration testing, in-situ, interpretation, shear strength, modulus, stress history, pore pressures, permeability, consolidation.

In situ cone penetration tests at the active Dashgil mud volcano, Azerbaijan: Evidence for excess fluid pressure, updoming, and possible future violent eruption

2009 ◽  
Vol 26 (9) ◽  
pp. 1716-1723 ◽  
Author(s):  
Achim Kopf ◽  
Sylvia Stegmann ◽  
Georg Delisle ◽  
Behrouz Panahi ◽  
Chingiz S. Aliyev ◽  
...  
Keyword(s):  
Fluid Pressure ◽  
Mud Volcano ◽  
Cone Penetration ◽  
Cone Penetration Tests ◽  
Penetration Tests

Influence of placement method on the cone penetration resistance of hydraulically placed sand fills

2001 ◽  
Vol 38 (3) ◽  
pp. 592-607 ◽  
Author(s):  
K M Lee
Keyword(s):  
Cone Penetration ◽  
Density Profiles ◽  
Hydraulic Fill ◽  
Dense Sand ◽  
Cone Penetration Tests ◽  
Cone Tip Resistance ◽  
Tip Resistance ◽  
Wide Range ◽  
Penetration Tests

The reclamation for the new airport at Chek Lap Kok in Hong Kong included the placement of a substantial volume of sand fill by various hydraulic placement techniques, which resulted in a wide range of as-placed densities of the sand fill. This paper described the use of cone penetration tests (CPT) on the evaluation of the possible ranges of density achievable by various hydraulic placement methods adopted in the construction of the new airport. The results of the CPT indicated that the placement technique is one of the most important factors in controlling the as-placed density of hydraulically placed sand fill. There is a marked contrast in cone tip resistance (and the associated relative density) profiles for the sand fills formed by subaerial and subaqueous placement methods, in which the cone tip resistance of the sand fill formed by subaerial placement is substantially higher than that of the sand fill formed by subaequeous placement. The results confirm that dense sand fill cannot be formed by subaqueous placement methods. The weakest zone is generally located just beneath the water level where fill is placed by subaqueous discharge.Key words: sand, hydraulic fill, cone penetration test, calibration chamber test, in situ density.

Liquefaction performance of soils at the site of a partially completed ground improvement project during the 1999 Chi-Chi earthquake in Taiwan

2001 ◽  
Vol 38 (6) ◽  
pp. 1241-1253 ◽  
Author(s):  
Der-Her Lee ◽  
C Hsein Juang ◽  
Chi-Sheng Ku
Keyword(s):  
Ground Improvement ◽  
Construction Site ◽  
Cone Penetration ◽  
In Situ Tests ◽  
Improvement Project ◽  
Cone Penetration Tests ◽  
Hydraulic Filling ◽  
Before And After ◽  
Penetration Tests

This paper examines the liquefaction performance of soils at the site of a partially completed ground improvement project at the Chang-Hwa Coastal Industrial Park during the 1999 Chi-Chi earthquake in Taiwan. The site is on land reclaimed by hydraulic filling. To meet the need of a planned construction, site characterization was carried out with standard penetration tests (SPTs) and cone penetration tests (CPTs) at 13 locations. Dynamic compaction was later performed to mitigate the potential liquefaction hazards at this site. Before completion of the ground improvement work, the site experienced a major earthquake, the Chi-Chi earthquake (magnitude Mw = 7.6). Evidence of liquefaction was observed in this earthquake in the unimproved area but not in the improved area. After the earthquake, additional site exploration was carried out using SPTs and CPTs. The data from these in situ tests carried out before and after the earthquake and in areas with and without ground improvement are analyzed and the results are reported.Key words: ground improvement, in situ tests, liquefaction, earthquake.

Interpretation of in situ test results from the CANLEX sites

2000 ◽  
Vol 37 (3) ◽  
pp. 505-529 ◽  
Author(s):  
C E (Fear) Wride ◽  
P K Robertson ◽  
K W Biggar ◽  
R G Campanella ◽  
B A Hofmann ◽  
...  
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Soil Liquefaction ◽  
In Situ Testing ◽  
Cone Penetration ◽  
In Situ Tests ◽  
Cone Penetration Tests ◽  
Penetration Tests

One of the primary objectives of the Canadian Liquefaction Experiment (CANLEX) project was to evaluate in situ testing techniques and existing interpretation methods as part of the overall goal to focus and coordinate Canadian geotechnical expertise on the topic of soil liquefaction. Six sites were selected by the CANLEX project in an attempt to characterize various deposits of loose sandy soil. The sites consisted of a variety of soil deposits, including hydraulically placed sand deposits associated with the oil sands industry, natural sand deposits in the Fraser River Delta, and hydraulically placed sand deposits associated with the hard-rock mining industry. At each site, a target zone was selected and various in situ tests were performed. These included standard penetration tests, cone penetration tests, seismic downhole cone penetration tests (giving shear wave velocity measurements), geophysical (gamma-gamma) logging, and pressuremeter testing. This paper describes the techniques used in the in situ testing program at each site and presents a summary and interpretation of the results.Key words: CANLEX, in situ testing, shear wave velocity, geophysical logging, pressuremeter.

scholarly journals LIQUEFACTION ASSESSMENT OF RECLAIMED LAND AT CENTREPORT, WELLINGTON

2020 ◽  
Vol 53 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Riwaj Dhakal ◽  
Misko Cubrinovski ◽  
Jonathan Bray ◽  
Christopher De la Torre
Keyword(s):  
Cone Penetration ◽  
Liquefaction Resistance ◽  
Reclaimed Land ◽  
Cone Penetration Tests ◽  
In Situ Data ◽  
Hydraulic Fills ◽  
Kaikoura Earthquake ◽  
Penetration Tests ◽  
Liquefaction Assessment

Observations of liquefaction-induced damage at the port of Wellington (CentrePort) provide an opportunity to evaluate the applicability of state-of-the-practice liquefaction evaluation methodologies on reclaimed land. This study focuses on the application of widely used simplified liquefaction assessment methods on the end-dumped gravelly fills and hydraulically-placed silty and sandy fills at CentrePort for the 2013 Cook Strait, 2013 Lake Grassmere, and 2016 Kaikōura earthquakes. Liquefaction assessment of the gravel reclamation poses several challenges due to its large percentage of gravel-sized particles making it difficult to obtain high-quality in situ data. The hydraulic fills at CentrePort are also of significant interest as they relate to a range of issues in the simplified engineering assessment around effects of fines and their plasticity on the liquefaction resistance. Following the 2016 Kaikōura earthquake, subsurface explorations were performed which included 121 Cone Penetration Tests (CPTs). Results of CPT-based liquefaction triggering and post-liquefaction reconsolidation settlement assessments using state-of-the-practice procedures are discussed and compared with observed liquefaction manifestation and settlements.

Guidance on Pressuremeter, Flat Dilatometer and Cone Penetration Testing

1986 ◽  
Vol 2 (1) ◽  
pp. 223-233 ◽  
Author(s):  
P. S. Finn ◽  
R. M. Nisbet ◽  
P. G. Hawkins
Keyword(s):  
Cone Penetrometer ◽  
Cone Penetration ◽  
In Situ Tests ◽  
Cone Penetration Tests ◽  
Cone Penetration Testing ◽  
The United Kingdom ◽  
Different Types ◽  
Cone Penetrometer Testing ◽  
Penetration Tests

AbstractBS 5930 provides little guidance on the specification, practice and interpretation of pressuremeter, flat dilatometer and cone penetration tests. This paper describes certain key elements in the successful use of such tests which are frequently overlooked in practice. The different types of pressuremeter available in the United Kingdom are reviewed and the importance of care in the installation of pressuremeters of all types is highlighted. The principles of operation of the flat dilatometer are presented and comments made on the interpretation and application of results. Cone penetrometer testing and the types of equipment available are also discussed. The necessity for frequent and thorough calibration of all testing devices is emphasised and requirements for data presentation and reporting of these in situ tests are indicated.

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