Geotechnical parameters expected for estimating the maximum allowable annular force (Pmax) in horizontal directional drilling (HDD) are sometimes empirically identified based on the final results in the conventional penetration check (SPT). Irrespective of the many benefits of SPT, its use in apply can be challenging given that the geotechnical parameters https://collaboration65554.jts-blog.com/30863243/soil-investigation-experts-bangladesh-an-overview