Browsing by Author "Muszyński, Zbigniew"

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Access status: Open Access ,
Zastosowanie geodezyjnych metod pomiarowych w badaniach nośności pali
(Wydawnictwa AGH, 2011) Muszyński, Zbigniew; Rybak, Jarosław
Conventional measurement of pile settlement during pile load test may be affected by ground movement due to displacements of anchor piles. The application of direct leveling of high precision enables to provide an independent reference measurement which is free from systematic errors. However this method is less accurate than the use of displacement sensors but provides good results. Some case studies of the use of geodetic methods in vertical and horizontal pile load testing were presented in the paper.
Access status: Open Access ,
Zastosowanie geodezyjnych metod pomiarowych w badaniach nośności pali
(Wydawnictwa AGH, 2010) Muszyński, Zbigniew; Rybak, Jarosław
Conventional measurement of pile settlement during pile load test may be affected by ground movement due to displacements of anchor piles. The application of direct leveling of high precision enables to provide an independent reference measurement which is free from systematic errors. However this method is less accurate than the use of displacement sensors but provides good results. Some case studies of the use of geodetic methods in vertical and horizontal pile load testing were presented in the paper.
Access status: Open Access ,
Zastosowanie metod estymacji odpornej w obliczeniach nośności granicznej pali
(2008) Muszyński, Zbigniew; Rybak, Jarosław
This work presents the results of the calculations of foundation pile load failure on the basis of the so-called 80%-method, formulated by Brinch Hansen. The approximation procedure has been analysed from the point of view of: the number of measurements of settlements, taken into account in the calculations, the weights of the settlement measurements and the change in the weights of particular settlement measurements (the elimination of errors by the resistant estimation). With the use of Mathcad environment, an algorithm was developed, which serves the calculating of load failure by the following methods: least squares method, when the same weights are assumed for all the analysed points; least squares method, assuming differentiated weights for particular points; Huber method, assuming the initial differentiation of weights; Danish method, with the assumption, that the weights for particular points are initially differentiated. In the computations, one made use of the last six observations in the aspect of elastic-plastic work of piles (the last six observations before the ending of the load test). The conclusions from the calculations are intended to constitute the starting point for the further development of the method of failure load computation on the basis of the results from the static load test, for the needs of calibrations - introduced, with growing frequency, into dynamic load tests.