Geotechnical parameters required for estimating the most allowable annular force (Pmax) in horizontal directional drilling (HDD) are frequently empirically decided based on the outcomes through the conventional penetration test (SPT). Regardless of the main advantages of SPT, its use in practice can be challenging because the geotechnical parameters established depending https://zionmnzm812.pointblog.net/5-simple-techniques-for-soil-analysis-and-testing-bd-74205470