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Analiza ściśliwości warstwowanych iłów krakowieckich

Wilk K.

Przegląd Geologiczny

2014

Vol. 62, nr 5

250--256

The substrate, whose compressibility has been analysed, served as subsoil for indirect foundations of bridges. A significant settlement of foundations was recorded while performing load tests. The results of the analysis indicate the specific structure of the Krakowiec Clays, as the cause of insufficient bearing capacity of piles. Small thickness of clay and silt layers prevents their separation, and certainly does not allow treating them as two soil types with different properties. The tested soil should be considered as a kind of natural composite, whose characteristics are unlikely to be "the resultant" of properties of constituent soils. Despite the high soil strength (very high values of strength parameters), the measured oedometer compression modules were significantly different from the standard attributed to this type of soils. The values of oedometer compression modules correspond with those prescribed by back analysis of settlement measured during the load test of piles. They were tested on natural undisturbed samples and on prepared samples of different humidities (from soil paste). The results were compared with those obtained by other researchers for soils of similar origin and alike physical properties.

Deformation of the Earth’s surface by local mass loading and uploading effects

Mojzeš M., Kollar P, Valko M.

Reports on Geodesy

2012

z. 1/92

191--200

The mass of a building influences a deformation of the Earth’s surface up to long distance from area of realization. The elastic and rheological effects of settlement are modeled by different methods presented in the many scientific papers. More deeply knowledge of mechanical properties of materials and modern computer equipment allow construct very precisely model reaction of the Earth surface on loading effects in time. Geodesists and geophysicists need to know this laws of deformation and theirs time evolution for design of control geodetic networks and for analysis of repeated control measurements of horizontal and vertical time series. The presentation contents the mathematical modeling of the Earth elastic surface deformation caused by loading and unloading effects caused by a mass.

The differences in determination of soil deformation characteristics between European Document, Polish and Slovak Standards

Bzówka J., Nguyen G.

Zeszyty Naukowe Politechniki Białostockiej. Budownictwo

2006

Z. 28, t. 2

45-57

The paper deals with the differences in determination of soil deformation characteristics between European Document ETC5-D1.97 [1], Polish Standard PN-88/B-04481 [3] and Slovak Standard STN 72 1027 [4].

W artykule przedstawiono różnice, jakie występują przy określaniu charakterystyk ściśliwości gruntu pomiędzy zasadami podanymi w dokumencie europejskim ETC5-D1.97 [1] i w normach polskiej PN-88/B-04481 [3] i słowackiej STN 72 1027 [4].