Geotechnical parameters necessary for estimating the most allowable annular tension (Pmax) in horizontal directional drilling (HDD) will often be empirically established based upon the results from the normal penetration check (SPT). Regardless of the main advantages of SPT, its use in practice might be demanding as the geotechnical parameters identified https://faith67665.answerblogs.com/31860340/soil-investigation-experts-bangladesh-things-to-know-before-you-buy