CDM Dolmen

IS PARATIE allows for the calculation of flexible walls, diaphragms, bulkheads and berms for which the soil-structure interaction is analysed in the non-linear field with hysteresis taking into account the deformability of the wall.‎ The model is based on the assumption that the interaction between soil and structure can be schematised with a series of discrete horizontal springs representing the reaction that the soil opposes to the movements of the structure.‎ Therefore, the interaction is described by a generic relationship between the horizontal displacement y and the ground reaction p at a given point.‎ An elastic-perfectly plastic law is commonly adopted to describe this relationship, assuming a linear variation of the reaction as a function of displacement with a lower limit identified by the active thrust value, which corresponds to the maximum decompression of the soil, and an upper limit corresponding to the passive resistance value.‎ The section can have a standard shape or be drawn from a large database of steel profiles, and can also vary in height; micro-piles and staggered micro-pile arrangements known as 'quincunxes' can also be simulated.‎ FEATURES Calculation and verification according to the ultimate limit state method andpermissible stresses.‎ Possibility of inserting one or two bulkheads by defining the upper and penetration heights.‎ Seismic force calculation in accordance with both Ministerial Decree 16/01/96, Ord.‎ 3274 and NTC 2018.‎ The effect of the earthquake can be considered as a concentrated or distributed force (in which case the bulkhead band on which the earthquake acts can be defined).‎ Possibility of defining an indefinite number of stratigraphies by differentiating(if required) between upstream and downstream zones.‎ Automatic calculation of the equivalent section in the case of a bulkhead consisting of micropiles or piles arranged in quincunxes.‎ Possibility of classifying the construction history by subdividing it into steps (excavation dimensions, ties, struts, deferred restraints, stratigraphic changes, backfills, etc.‎).‎ Possibility of inserting postponed struts, hinged or attached to bulkheads, in a given insertion step and possible subsequent removal step.‎ Possibility of inserting tie-rods, with definition of descriptive technical data sheets according to the Bustamante and Doix approach; it is necessary to indicate their height, length, inclination, jacking tension, insertion step and eventual removal step, etc.‎ It is possible to assign a specific safety factor that will be used for analysis.‎ The maximum pull is automatically calculated and the relative step indicated.‎ Verification of the header connection beam.‎ Possibility of defining external constraints, relative to the initial unformed configuration, postponed relative to the chosen step, postponed with additional impressed failure.‎ Possibility of entering any materials and sections for all structural elements (including irons for reinforced concrete sections).‎ Possibility of providing a groundwater level that can change over time and calculation of filtration pressures.‎ Possibility of inserting soil loads and any type of load on structural elements, with insertion and removal steps.‎ Possibility of inserting any type of load on structural elements (including struts) with insertion and removal steps.‎ Automatic calculation of the elements' own weight andseismic force.‎ Elastoplastic soil-structure interaction diagram with hysteresis.‎ Shear verification for prestressed reinforced concrete.‎ Straight shear-flexureverification of all structural elements (permissible stresses or limit states).‎ Intuitive graphical user interface.‎ Calculation of failures upstream of the bulkhead using correlation methods with the horizontal displacements of the structure itself.‎ Automatic and customisable calculation report, with description, tables, drawings, in Word (.‎doc) and other formats (.‎html and .‎txt).‎ 3D visualiser of the overall work to understand the spatial and temporal evolution of the work and for visual confirmation of the design choices made.‎