GGSD Program Details for WALLAP

WALLAP

Category	Retaining wall design
Publisher	Geosolve
Platform	Win95/98, WinNT, Win2000, WinXP
Status	Commercial
Description	WALLAP is a program for analysing the stability of cantilevered, anchored, strutted, sheet piled or RC diaphragm retaining walls. It offers two separate types of analysis: Limit Equilibrium Analysis (Calculation of Factors of Safety) and Displacement Analysis: Modelling of the stage by stage development of forces and wall movements as construction proceeds. The wall and soil are modelled as a beam and springs. Two spring models are available: Subgrade reaction analysis (for routine design); 2-D Finite element analysis (for a more rigorous approach). A maximum of 80 different soil types can be defined including: cohesive, cohesionless, drained, undrained, normally-consolidated, over-consolidated. Soil strength is defined in terms of Ka, Kac, Kp, Kpc and cohesion. There is a Help facility to derive Ka etc from soil, wall friction and backfill angles. Soil stiffness is expressed in terms of Young's modulus and Poisson's ratio. Optional soil properties include: Linear variations of cohesion and modulus with depth; Arching active behaviour; Simple non-linear elastic soil model. Struts or anchors can be installed at up to 80 levels and may be pre-stressed. Struts can also be removed after installation. Hydrostatic or non-hydrostatic Water Pressure Profiles may be defined on both sides of the wall to model a variety of complex conditions including: seepage, submerged ground, perched water tables and uplift pressures under structures. The automatic water pressure balancing option offers a convenient way of balancing water pressures at the toe of the wall by assuming a linear variation of piezometric head between the water levels either side of the wall. Surcharges can be applied at or below ground level on the active or passive side of the wall. All surcharges are defined over a rectangular loaded area. Ramp surcharges can be defined i.e. Surcharge magnitude may vary linearly with distance from the wall. Horizontal and moment loads may be applied to the wall. Rotational spring restraints may be applied at any elevation in order to model the effect of floor slabs which are built into the wall. Data entry is menu driven. Data values are checked for permissible ranges. A list of data Errors and Warnings is displayed if unacceptable or inappropriate data combinations are detected. Data are displayed graphically during data entry and editing. Data may be entered in any consistent set of units e.g. (kN,m), (lb,feet). All print-out from the program is automatically annotated in the appropriate units. There is a post-processing facility for creating Reports with selected listings of Input data, Output at selected stages of: Factors of safety; Bending moments and shear forces; Wall pressures; Displacements; Strut or anchor forces. Summary output includes: Factors of Safety at each stage; Strut forces at each stage; Maximum/minimum bending moment and displacement at each stage; Cumulative bending moment and shear force envelopes; Cumulative displacement envelope. Results are displayed in the form of bending moment, shear force, wall pressure and wall displacement diagrams. Version 5 for Windows has a high degree of compatibility with version 4 for DOS including: data files are compatible; the definition and usage of all engineering parameters is preserved.
Cost	GB Pounds 2700
Data formats supported	None stated
Supplier in United Kingdom	Geosolve
Supplier in United Kingdom	GTS CADBUILD Limited