State-of-Art Working platform for Deep foundations-PPT Presentation

PPT Presentation

Pdf Summary

The presentation examines the design and use of temporary working platforms and roads for heavy equipment in deep foundation construction. These platforms provide stable, safe surfaces for the movement and operation of piling rigs, cranes, and other plant. A typical piling rig may weigh about 110 tonnes and exert 12–14 tonnes per square metre beneath its tracks, making adequate ground support essential.<br /><br />Poorly supported equipment can become unstable or overturn, potentially causing serious injuries or fatalities, construction delays and added costs, legal consequences, and reputational damage. Platform design should account for soil conditions, equipment loads, reinforcement, drainage, and operational demands. The presentation reviews guidance for platforms under static loading, including CIRIA, BRE BR 470, and the Temporary Works Forum (TWf), and methods for temporary roads under repetitive loading, including Giroud’s method and Indian Roads Congress guidance.<br /><br />Two case studies describe geocell-reinforced granular platforms for piling and cut-off wall construction. At one piling site, unreinforced gravel mixed with clay became unstable and rut-prone, particularly in wet conditions. Repeated repairs and levelling delayed equipment movements. The required platform thickness was estimated at 900–1,100 mm for unreinforced construction, compared with 650 mm using geogrid; a comprehensive geocell design reduced it to 475 mm.<br /><br />Construction involved preparing the subgrade, laying a separation geotextile, expanding and joining geocells, filling them with granular material, and compacting the surface. The reinforced platforms enabled easier equipment movement and positioning, reduced rutting and repairs, and simplified muck removal. They also offered potential cost savings on soft soils, material reuse, reduced carbon footprint, and durable performance in varied weather.<br /><br />The presentation recommends developing comprehensive Indian guidelines for working platforms, applying current construction technologies and materials, prioritizing worker safety, and making properly designed platforms a contractual requirement.

Keywords

temporary working platforms

heavy equipment

deep foundation construction

piling rigs

ground support

geocell reinforcement

geotextile

rutting

platform design

Indian guidelines