Ailing Foundation?

    piling and foundation machinery

    Piling and foundation is attaining its due importance in India. However, there are critical issues countered by the piling and foundation industry barring its optimum percolation in the construction sector. P.P.Basistha takes a look.

    India is witnessing large scale development of infrastructure projects where piling is the critical element of construction. The infrastructure projects pertaining to bridge projects to transport vehicles with high axle loads. Elevated mass rapid transportation projects is also a vital segment where piling is a critical component. Development of core infrastructure projects and industrial projects requiring ground preparation (recent brownfield expansion of Tata Steel at Jamshedpur requiring percolation through steel slag or Vallarpadam International Container Transshipment project) is also necessitating deployment of piling and foundation equipment. However, issues galore that is restricting the usage of piling equipments.

    piling and foundation machinery

    Responses from manufacturers revealed that codes guiding the usage of piling and foundation equipment yet to attain its advanced character in India. The piling codes in use in India dates back to 1970’s. There is a lack of adequate guidelines laid by the Bureau of Indian Standards (BIS) for usage of proper and advanced piling methology for customized and complex construction requirements claims manufacturers. As a consequence, the codes falls short in highlighting the usage of modern piling techniques in India. The codes are much in contrast to those laid by Europe and America which works on DFI guidelines. Essentially, the codes falls short in incorporating the broad users perspective of the equipment manufacturers and contractors precisely pertaining to the ready mix industry, soil testing, cement or altogether the piling contractors. This is despite the fact that the component of piling and foundation is 5 percent or even more for any core high end civil engineering project in India. The code laid by BIS is IS 2911.

    Deep Issues

    piling and foundation machinery
    Lack of incorporation of advanced codes has been due to the reason that BIS remains the nodal agency for laying the guidelines for piling industry in India. Further enquiries from equipment manufacturers and contractors reveal that shortage of advanced guidelines as an instance have sustained multi various confusing issues with the contractors while executing the project. Notable among them is the exact rate of pile socketing required in rock with the construction companies. Contractors have lack of requisite clear guidelines as to what should be the quantum of piling in metres that can be undertaken in various kinds of rocks. This is despite the well-known fact that rock conditions differ between Bangalore, Delhi, Chennai, and Mumbai. Contractors being engaged in elevated stretch in the metro railway projects critically countered the issue of what should be quantum of pile socketing per metre in the rocks. Confusion has been added to the issue where there has been composite rock conditions. Similar feedback has been received from contractors and project consultants involved in executing the new Kolkata Metro Rail Corporation project connecting Salt Lake City to Howrah. Vital stretch of the project is on elevated corridor.

    Paradox has been added with the project executing agencies laying stipulations barring usage of chisels attached with tripod in most cases to facture the rocks. The stipulations of the contractors are based on the chances of weakening of the foundation of the pile. Contractors and manufacturers claim that the skepticism of the project executing agencies are not always unfounded.

    However, again the irony of the fact is that tenders for most of the construction projects in India are based on pricing. This is both for bankable projects having high financial exposure through viability gap funding or public private partnership mode as well as for projects funded internally by the project developer. Usage of piling technology becomes restrictive in all the cases as cost per metre of piling can range anywhere between Rs.10,000-50,000 or much above resultantly badly hurting the margins of the contractors. Overall baring the usage of equipment in the construction sector.

    piling and foundation machinery
    High cost of imported piling equipment is also to blame for the deficient use of these multipurpose machines. Figures from manufacturers point out that the market share in terms of volume of piling equipment are at the modest range of 100-150 equipment per year. This makes local production of the equipment commercially unviable. Possible reduction in custom duty of the equipment can bring down its cost.

    Factor responsible for slow percolation of piling equipment in the Indian construction sector has also been due to the dearth of specialized contractors engaged solely in piling. Much in contrast to Europe and US, piling is not a separate job in India. It is very much the integral part of the whole construction project. Piling jobs are sub contracted to specialized contractors. The reason for the same has been due to presence of handful specialized contractors in piling. This is despite the fact that Indian core and industrial construction projects are being increasingly executed on EPC model. Piling happens to be vital component of many of the projects.

    Knowledge dissemination on the usage of piling and foundation equipment has also barred increased usage of the equipments to the contractors. Being complex, specialized and multipurpose equipments involving cutting edge technology, there is an increase requirement of knowledge dissemination to contractors. This is required as manufacturers are making sustained developments in the machines in response to newer application requirements for the global markets. Knowledge dissemination on the newer improvements has to be equally shared with Indian contractors.

    piling and foundation machinery

    However, it is positive to note that there are increased number of workshop being organized by equipment manufacturers in India on the mechanism of the applications and its wide application areas. In tandem, workers training programme is also emphasized upon. However, training programme has to be increased making them cost effective. It would be important to make training programme certified. But most significantly, equipment manufacturers have to suggest proper usage solutions to contractors during its entire construction cycle that would provide smart return of investment to contractors. Equipment usage solution is vital as because application of piling equipments happens to be spontaneous in India as the equipment is only required for a specified time period. This is despite the contractor has sufficient job volumes in hand.

    NBMCW February 2011

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