Abstract
The subjects of this paper are resistance structures constituted by reinforced soil applied in highway engineering. Test results carried out on laboratory models are presented, leading to the estimation of the size and shape of the wedge of the reinforced soil embankment block, in the boundary state of active pressure. The task was conducted in the following two stages: on the basis of measured horizontal strains of the embankment (unitary lateral pressures) and reinforcing dowels - with the application of sensors of electro-resistant tensometry. The slip curve, determining the searched block wedge, is formed by the points of maximal normal stress occurring in the reinforcement dowels located in the horizontal layers. The slip curve divides the embankment area into two zones: active (block wedge) and passive, in which dowel anchorage takes place.
Highlights
The classical reinforcement soil, being the subject of analysis, has found the broadest application in the field of resistance structures
The task was performed as a test, on the basis of measured strains of reinforcement dowels, with the application of sensors of electro-resistant tensometry
The task was performed as a test, on the basis of measured strains of reinforcement dowels, by means of electro-resistant tensometric sensors
Summary
The classical reinforcement soil, being the subject of analysis, has found the broadest application in the field of resistance structures (retaining walls of road embankments, bridge heads, etc.). The article presents a testing method, enabling determination of the value of block wedge reduction in the vertical wall embankment of non-cohesive soil reinforced with horizontal dowels, in reference to an identical structure with no reinforcement. The size and shape of the wedge of soil embankment block with reinforcement was estimated in the boundary state of active pressure. The test method consists of the analysis of processes of changes of the value of soil pressure on the retaining wall, as the distance of the test load of the surcharge (sectional, executed by means of the so-called stemple) from the measurement retaining wall increases. The range of the block wedge in the pressure boundary state was determined as parameter ly,boundary in particular measurement levels, on the basis of the analysis of the course of pressure dwindling phenomenon, as the loading stemple moves further apart from the wall. The adopted test method enables to preserve relative specificity of the testing conditions and the planned change of one of the parameters with other parameters unchanged
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