Temat: soil sounding - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effectiveness of reinforcing an earth structure with a system of counterfort drains over a long-term use
Autorzy:: Olesiak, S.
Hydzik-Wiśniewska, J.
Powiązania:: https://bibliotekanauki.pl/articles/178465.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: counterfort drain
landslide
geotechnical monitoring
slope stability analysis
weight sounding test
WST
soil laboratory tests
Opis:: The paper evaluates the effectiveness of reinforcing a damaged earth structure with making counterfort drains in its slope. The system of counterfort drains changed the soil properties significantly over a long-term use. The evaluation was based on many years of field and laboratory tests and stability analysis. The field tests concerned the observation of N_WST probing resistance change, and the laboratory tests concerned the change in soil consistency and water content. The paper presents the results of tests that were conducted over 13 years.
Źródło:: Studia Geotechnica et Mechanica; 2018, 40, 4; 244-253
0137-6365
2083-831X
Pojawia się w:: Studia Geotechnica et Mechanica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Role of accuracy and quantity of field tests in engineering-geotechnical researches for construction
Autorzy:: Kutliyarov, Damir
Ryzhkov, Igor
Kutliyarov, Amir
Khafizov, Ayrat
Zubairov, Ruslan
Powiązania:: https://bibliotekanauki.pl/articles/1064840.pdf
Data publikacji:: 2020
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: soil tests
accuracy (reliability) of tests
static sounding of soils
bearing capacity of piles
entropy
amount of information
Opis:: The aim of this work is to summarize previously conducted studies on the optimization of the unequal geotechnical testing program and on the selection of the desired calculation indicator based on the results of such tests. The approximate, but quick and cheap tests (“express methods”) are recommended to be performed on a large scale and considered as a means of assessing the geotechnical structure of the site as a whole. It is proposed to carry out expensive “accurate” tests in a reduced volume and to use them as a means of correcting approximate tests. In the article, these issues are considered by the example of determining the bearing capacity of piles according to the data of static sounding (cone penetration testing – CPT), dynamic and static tests of full-scale piles. We propose the mathematical model for evaluating the informative content of the test complex, based on the concepts of information theory. The site is mentally divided into several sections, each of which is characterized by one of the possible values of the ultimate resistance of piles of a certain length. All variants of “placement in the plan” of possible values of pile resistances (“site images”) are considered. Initially, when nothing is known about the true value of the pile resistances in each section, all possible values of the pile resistances are assumed to be equally probable, i.e. the uncertainty of the situation is maximum. In the theory of information, such uncertainty is quantified by the value called entropy. When any test is performed at the site, the uncertainty decreases, and the more accurate the test the more significant is the decrease. The difference in entropy before and after the test represents the amount of information (in bits) that these tests carry. The calculations using this model showed that the information content of a large number of approximate tests can (due to heterogeneity of the soil) exceed the information content of small exact tests. Only one approximate test method can lead to the systematic error (overestimation or underestimation of the average value of the desired indicator). It is necessary to carry out control “exact” tests and approximate tests to eliminate such a danger. A technique is proposed for adjusting approximate estimates based on data from “accurate” tests, which ensures optimal “safety margins” in decisions being made.
Źródło:: Scientific Review Engineering and Environmental Sciences; 2020, 29, 4; 421-434
1732-9353
Pojawia się w:: Scientific Review Engineering and Environmental Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: On the possibility of testing Miocene clay from Cracow area using Weight Sounding Test (WST)
Autorzy:: Olesiak, S.
Powiązania:: https://bibliotekanauki.pl/articles/178792.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: geotechnical engineering
weight sounding test WST
geotechnical site characterization
soil laboratory investigation
undrained shear strength
inżynieria geotechniczna
sonda wkręcana WST
badania geotechniczne
badanie laboratoryjne gleby
Opis:: Polish standards concerning field investigation with the use of a Weight Sounding Test (WST) probe give interpretation of results for non-cohesive soils only. The lack of such interpretation for cohesive soils excludes this testing equipment from use. This paper presents the results of geotechnical site investigation and laboratory tests performed for Miocene clays in Carpathian Foredeep in the Cracow area. Based on the analysis of the results a correlation was determined between the characteristic values for the WST probe (number of half-turns NWST) and the selected properties of Miocene clays. The article is an attempt to create a complete interpretation of test results obtained for cohesive soil with WST equipment.
Źródło:: Studia Geotechnica et Mechanica; 2014, 36, 1; 71-78
0137-6365
2083-831X
Pojawia się w:: Studia Geotechnica et Mechanica
Dostawca treści:: Biblioteka Nauki

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