AUTOMATIC SPT HAMMER
AUTOMATIC SPT HAMMER
Roschen auto hammer meets the strict definition of ASTM Standard D-1586. To reduce the moving parts, we use just one lifting dog. We built the lifting rack into the weight slug itself, eliminating another part. The drive mechanism is easily removeable(just four bolts) for inspection, adjustment, or repair. The hammer fits the same gate mounting system so it can easily replace your existing hammers when their useful life is over. The new style hammer can be fitted with the back pounding feature as well (except when the side-cylinder mounting feature is utilized). It is available in combinations of weight sizes and can be side-cylinder mounted, gate mounted or free hanging.
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Site Exploration, Site Characterization, Subsurface Exploration, Drilling, Standard Penetration Test, Cone Penetrometer
The Standard Penetration Test (SPT) and Cone Penetrometer Test (CPT) have become industry standards for subsurface geotechnical investigations using small diameter (<8-in. [20-cm]) borings and soundings. Both procedures have evolved over a period of 100 and 70 years, respectively, and have been adopted as ASTM standards. Each procedure has certain advantages over the other, but both can elicit incorrect data under particular subsurface conditions that are often overlooked, depending on the experience of field personnel operating or logging the tests. This paper seeks to explain the operative assumptions employed in both procedures, highlight the various corrections that are commonly employed, and warn the reader of common errors in interpretation.
The article concludes by stating that, under most conditions, the joint employment of SPT and CPT together has the greatest potential for characterizing sites correctly.
ASTM D1586 - 11
Standard Test Method for Standard Penetration Test (SPT) and Split-Barrel Sampling of Soils
For more information please contact:
ROSCHEN INC.
ROSCHEN GROUP LIMITED
ROSCHEN HOLDINGS LIMITED
Skype: ROSCHEN.TOOL , ROSCHEN_GROUP
WeChat: +86-137 6419 5009 ; +86-135 8585 5390
WhatsApp: +86-137 6419 5009 ; +86-135 8585 5390
Email: roschen@roschen.com ; roschen@roschen.net
Website: http://www.roschen.net ; http://www.roschen.cn
http://www.roschen.com ; http://www.roschengroup.com
