Evaluation of soil parameters by in-situ tests for mapping

• Autorzy: Młynarek Z.
• Języki publikacji: PL

Abstrakty

PL

Artykuł przedstawia i dyskutuje kilka problemów związanych z programowaniem i interpretacją badań in-situ, a także dokumentowaniem ich rezultatów. Analiza zawiera ocenę wpływu efektów geologicznych i inwestycyjnych na parametry mechaniczne gruntów, kryteria doboru metody badania in-situ dla rozwiązania problemu geotechnicznego, syntetyczną ocenę odnośnie współczesnej koncepcji opisu parametrów wytrzymałościowych i odkształceniowych gruntów. Artykuł przedstawia także skrótowo nowe techniki badania in-situ, na przykład: badania typu T-bar i „ball penetrometer”. W pracy omówiono syntetycznie podstawy teoretyczne dla przygotowania reprezentatywnych parametrów gruntów, które są wykorzystywane do konstrukcji jednorodnych geotechnicznie warstw gruntów oraz podano przykłady wydzielania jednorodnych warstw gruntów w podłoża, traktując problem jako zadanie jednowymiarowe (1-D) i płaskie (2-D). Przedstawiona została także koncepcja: grupowania danych jako zadanie trójwymiarowe (3-D). Danymi do grupowania i wydzielania warstw były parametry z badania CPTU tj. znormalizowany opór stożka i współczynnik tarcia. W artykule przedyskutowano także efektywność zastosowanych metod dla określenia 3-D modelu podłoża tj. modelu litologicznego i wytrzymałościowego oraz modelu definiującego sztywność podłoża.

EN

The paper presents and discusses several components of such procedures as programming and interpretation of in-situ tests and documentation of their results. These include the assessment of the effect of geological and investment processes on mechanical soil parameters of subsoil, criteria for the selection of in-situ testing techniques to solve the presented geotechnical problem, a synthetic conclusion concerning the determination of present-day concepts and a description of strength and deformation parameters of soils using CPTU, DMT, VST and SCPTU. The paper also briefly presents new insitu techniques belonging to the full flow group, e.g. T-bar and ball penetrometer tests, as well as theoretical foundations for the determination of representative parameters for the isolation of geotechnically homogenous soil layers in the subsoil. Examples are given of the isolation of homogenous layers using the cluster method and the krieging method, treating the problem as a uniaxial (1-D) and flat (2-D) problem. Moreover, the author’s 2-stage concept for clustering data as a quasi three-dimensional (3-D) problem. Data used to isolate layers included parameters from CPTU, normalized cone resistance and a coefficient of friction. The paper also discusses the effectiveness of the applied methods to obtain a 3-D model of subsoil structure, i.e. lithologic and strength models, and a model defining the diverse subsoil rigidity.

Słowa kluczowe

PL

badania in situ; belka żelbetowa; zbrojenia poprzeczne

EN

interpretation of in-situ tests; CPTU; DMT; SDMT; T-bar; ball penetrometer tests; methods of mapping

• Wydawca: Silesian University of Technology
• Czasopismo: Architecture Civil Engineering Environment
• Rocznik: 2008
• Tom: Vol. 1, no. 1
• Strony: 75--98
• Opis fizyczny: Bibliogr. 95 poz.

Twórcy

autor

Młynarek Z.

• Agricultural University, Poznań, Poland,

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