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National Repository of Grey Literature 4 records found  Search took 0.02 seconds. 
Experiment E5/0,1 with lateral passive pressure during rotation about the toe - granular mass deformations
 Koudelka, Petr ; Bryscejn, Jan
A basic physical experimental research of lateral passive pressure is in progress at the Institute. The research is composed of three doubles of the same experiments with three basic retaining wall movements: rotations about the toe and top and translative motion. The experiment E5/0,1 with passive pressure and pressure at rest during wall rotation about the toe was carried out in 1st half 2012 and it was the first of the same experiment double (the 2nd one was the experiment E6/0,1 finished in the early 2013. Both experiments together should prove a real behaviour of non-cohesive mass acting on moving wall. The behaviour appears distinct from a theory of EUROCODE 7-1 contemporaneously used. Each of experiments has brought a huge data quantity. The paper shows mass deformations and slip surfaces of the experimental sandy mass.
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Experiment E6/0,2 Lateral Passive Pressure – Rotation about the top
 Koudelka, Petr ; Valach, Jaroslav ; Bryscejn, Jan
The paper gives information on a repeated long-term experiment E6/0,2 with lateral pressure at rest and passive pressure during wall rotation about the top towards into tested granular mass. The experiment was successfully finished in the last year 2011 and (together with a previous experiment E5/0,2) it should prove gained results which appear distinct from a theory of EUROCODE 7-1 contemporaneously used. Both experiments monitored and registered both pressure components and mass deformation and displacements into the sandy mas.
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Knowledges Brought by Research of Lateral Pressure of Granular Materials
 Koudelka, Petr
The contemporary conventional theory of earth pressure and standards are based on the old idea of a single shear soil mass surface defining earth pressure stress along the whole height of the retaining structure and some others assumptions which are not correct. The paper presents both some important knowledge from the research and proofs for a more general theory of earth pressure.
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Dissaccordance of EC7-1 and CSN 73 0037 to Knowledges aboutEarth Pressure
 Koudelka, Petr
The paper shows objections against the contemporary conventional theory of earth pressure and standards and designs a non-conventional conception of the lateral pressure on the advanced comprehensive non-linear dependence based. The conception takes into account the singularity of pressure at rest and the shear strength decrease after the peak value.
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