Rousch Power Plant
412 MW Combined Cycle Power Plant Abdul Hakim, Pakistan
Design of civil works for multi-million combined cycle power plant with 412 MW output. Design and construction drawings of foundations for gas turbine building, heat recovery & steam turbine building, switchyard, water intake structure, all ancillary plants and buildings. Services including water & wastewater treatment plant, sewage treatment plant, drainage, pipe racks, cable ducts, roads and drainage.
All mechanical, electrical and steel design and the wetting of all concrete/civil works was administrated by Siemens Germany.
Central Control Room Building
A three-storey concrete structure with elevator shaft. The super structure was analyzed as a three-dimensional model using frame elements and the elevator shaft was modeled with plate elements. The rigidity of the slabs was also taken in to account by using the rigid frame diaphragm modeling option. All loads were calculated as per ACI and uniform building codes and the reactions and stresses obtained at column base points due to fixity conditions were used for the analysis of the foundation. The mat foundation was modeled against these applied forces using soil springs. Structural drawings were issued for construction after approval of formwork drawings from Siemens as per their mechanical and equipment layout. |
Heat Recovery and Steam Turbine Building
A structural steel building for heat recovery and steam turbine. The foundation of the structure was modeled as a two-leveled mat connected with retaining wall to transfer loads without any prominent differential settlements. The geometry of the mat was modeled in such a way that its central part was kept hollow to exactly match the size of turbine foundation with 25mm expansion gap. Different thicknesses to different plate elements were assigned to cater for trenches. Critical stresses were calculated at different column locations against the applied loads and a total of 24 load combinations of crane loads were checked. The reinforcement drawings were only followed the approval of formwork drawings and design calculations by Siemens AG. |
Gas Turbine Building
An ‘F’ shaped steel structure for two gas turbines. All base plate forces provided by Siemens were used to analyze the foundation mat three-dimensionally. The geometry of the mat was modeled in such a way that its turbine areas were kept hollow to exactly match to the size of turbine foundations with provisions of 25mm expansion gaps. Critical stresses were calculated at different column locations by considering a total of 24 load combinations of crane loads with dead and live loads. Siemens wetted all design calculations and drawings before there issue for execution. |
Prefabricated Stack Foundation
Foundation analysis of prefabricated steel stacks with heavy loads and equipment installed in the vicinity. The structural model of the mat was analyzed against predefined loads with different load combinations at the anchor bolt locations and truck loading on predefined area. The analysis involved the construction of a complicated/irregular model with different thickness for plate elements at trench, pit and anchor bolt pocket locations and also the calculation of soil springs for each node of the plate element. Weight of the mat was taken into account by activating the self weight option of the software during run time. All design and drawings were fully coordinated with main plant layout, vicinity equipments and with all services drawings. |
Miscellaneous structures
Miscellaneous structures include oil pits, cable ducts, transformer pits and foundations, retaining walls, slabs on grade, concrete pads with embedded parts and anchor bolts. Detail manual calculations were performed for these small structures while providing proper detailing and specifications for appropriate water stopper, sealers and fillers in retaining walls and slabs. Drawings were produced after coordinating with other plant and services drawings. |
updated: June 2002