Patent ID: 8221025
Filing Date: 2012-07-17
Classification: E01C

Abstract:
1. A method for laying a paving mat of paving material on a planum with a paving screed being towed floatingly in travelling direction on the paving material by a road paver, the paving mat comprising a lane of a determined width and at least one sideward slope, the slope being inclined downwardly with an angle (α) from the transition to the outside, the paving screed including a base screed and at least one extension screed which is mounted at the front side or the rear side of the base screed and is slidable lateral to the travelling direction substantially parallel to the base screed for varying a working width, the base screed and the extension screed each having a sole plate, the sole plate of the extension screed being inclined laterally with the angle of the slope relative to the sole plate of the base screed, according to which method upon varying the working width by sliding the laterally inclined extension screed relative and parallel to the base screed and/or upon varying of the angle of the slope by laterally tilting the sole plate of the extension screed relative to the sole plate of the base screed, the sole plate of the extension screed being adjustable in height direction relative to the base screed by means of at least two height adjustment assemblies which are distant from each other in sliding direction of the extension screed in order to maintain the predetermined lateral position of the transition, comprising the following steps: measuring a height difference substantially perpendicular to the planum between a fixed measuring location at the base screed and a location along a reference line fixed at the extension screed, which reference line is parallel to the laterally inclined extension screed and the slope, performing the measuring step during after setting the lateral position of the extension screed, storing the measured height difference as a target value, measuring a deviation of the height difference from the target value caused by the variation while the paving mat is laid, actuating the height adjustment assemblies corresponding to the measured deviation to correct the deviating height difference to the target value exclusively by an automatic height adaptation of the sole plate of the laterally inclined extension screed.