Marek Bajda

Warsaw University of Life Sciences - SGGW | SGGW · Department of Geotechnical Engineering

The permeability of soil is an important factor controlling the flow of water through the subsoil. The article presents the results of studies of hydraulic parameters for overconsolidated clays using in situ tests. Using the excess pore pressure normalization technique, both in the case of monotonic and dilatory dissipation tests, and the time at w...

W artykule, na przykadzie kampusu SGGW w Warszawie,przedstawione zostay kryteria identyfikacji warstw geotechnicznychna obszarze wysoczyzny morenowej, pozwalajcena bardziej wiarygodn ocen parametrw geotechnicznych poszczeglnychwarstw podoa z uwzgldnieniem lokalnych uwarunkowa.W pracy wykorzystano wyniki bada terenowych,gwnie CPT oraz DMT, ktre porw...

Based on the results of dynamic probing (DP), time-domain reflectometry (TDR/MUX/MPTS), resistivity cone penetration tests (RCPT), Marchetti dilatometer tests (DMT), and seismic dilatometer tests (SDMT), it is possible to develop a relationship to calculate the relative density (Dr) and degree of saturation (Sr) of selected sandy soils. Compiled da...

Standard test methods may not be suitable or sufficient for determining the geotechnical conditions of a structure’s subsoil and the effects of the designed structures on the environment. Geophysical test methods, validated with other methods, may prove useful. In recent years they have found many new applications in engineering practice, both geot...

Various types of trenchless methods are extensively used to create engineering barriers for the purpose of achieving relatively low hydraulic conductivity of the subsoil and hydrotechnical structures. The most commonly used technologies of the grouting curtain creating are the DSM (Deep Soil Mixing), WIPS (Vibro Injcted Thin Wall), low-pressure inj...

W artykule przedstawiono metodykę i wyniki terenowych badań geotechnicznych, sondowań polową sonda obrotową FVT i badań dylatometrycznych DMT wykonanych w podłożu zbudowanym z gruntów organicznych. Na podstawie wyników przeprowadzonych badań określono rozkłady z głębokością wytrzymałości na ścinanie bez odpływu (τfu) i moduł ściśliwości (M) torfu i...

The preconsolidation stress is an important phenomenon that determines the value of stress history exerted in the past on the subsoil in the geotechnical engineering. Overconsolidation ratio ( OCR ) is one of the main criteria conditioning soil behaviour and its characteristics. Here thought, the yield stress ratio ( YSR ) is used to determine the...

The overconsolidation ratio of eemian gyttja determination. The overconsolidation ratio is an important parameter that determines the value of stress history exerted in the past on the subsoil in the geotechnical engineering. Overconsolidation ratio (OCR) is one of the main criteria conditioning soil behavior and characteristics. To know the relati...

Soils occurring in the soil “active zone” are in contact with the surface and are directly influenced by external factors (mainly climatic changes) that cause variation in their parameters over time. Dynamic and uncontrolled changes of soil properties e.g. due to rainfall and evapotranspiration processes may affect field test results leading to the...

Estimation of shear modulus C0 for clays. The paper presents the advanced methods and devices using to determine the shear modulus in soils. A combination of field and laboratory tests was used to characterise the behaviour of a overconsolidated clays. The soil shear modulus at very small strain range Gq was estimated from the SCPTU and the bender...

In recent years, the permeability of soils have become the most important geotechnical parameter in the environmental engineering , due to its significance in the prediction of contaminant migration. For the foundation design purposes among other parameters, the hydraulic conductivity or coefficient of consolidation are needed to predict time-depen...

The paper presents the results of field and laboratory tests performed on organic soils from the "Zoliborz channel" on the route of the II underground line in Warsaw. Seismic Dilatometer Tests (SDMT) were carried out in order to evaluate the geotechnical conditions in one of the most difficult sites in Warsaw. For comparison, results of SCPT test a...

Small strain stiffness in overconsoli-dated Pliocene clays. A huge development of technical infrastructure, including the construction of many high-rise buildings, roads, railroads and extension of subway lines, took place over the recent years in Poland. Therefore, numerous planned investment projects require geotechnical data documenting the vari...

In this study a geotechnical tests were undertaken to characterize the site geotechnical conditions located on Tamka St. in Warsaw. A description of geology was based on the field investigation, laboratory tests and the archive documents analysis. In situ (boreholes, CPTU, DMT) and standard laboratory tests were used to determine physical propertie...

In this study a geophysical investigation using electric resistivity tomography (ERT) was undertaken to characterize the condition of earth levees. The field measurements were conducted on Vistula levees near Kraski Górne. The ERT method allowed mapping electric resistivity structures along levees and so relatively high and low resistivity zones in...

In this study a geotechnical tests were undertaken to characterize the site geotechnical conditions located on Tamka St. in Warsaw. A description of geology was based on the field investigation, laboratory tests and the archive documents analysis. In situ (boreholes, CPTU, DMT) and standard laboratory tests were used to determine physical propertie...

Wyznaczenie geotechnicznych warunków posadowienia obiektów budowlanych obejmuje profesjonalne badania terenowe i laboratoryjne gruntu. W praktyce inżynierskiej coraz bardziej popularnym urządzeniem stosowanym do badań terenowych podłoża gruntowego jest sonda statyczna CPTU. Wytyczne i zalecenia dotyczą tylko sondy o powierzchni stoĪka 10 cm2 , ale...

The use of resistivity and seismic cone penetration tests for site characterization The use of resistivity and seismic cone penetration tests for site characterization. Recent application of cone penetration tests to geotechnical and environmental site characterization has generated a wide collection of new sensors. This paper presents methods of i...

In geotechnical engineering for environmental purposes the mechanical characteristics of soil including the stress history, deformation, permeability and strength parameters are the most important characteristics which govern the behaviour of the soil deposits. Therefore, the evaluation of these parameters is the one of the most important tasks in...