Accuracy of determining pile capacity by static and dynamic methods in difficult ground conditions in Astana

Abstract

The article presents the results of the dynamic (DLT), static (SLT) and a new method of Pile Dynamic Analyze (PDA) tests of the reinforced concrete piles with rectangular section 30 x 30 cm and length 12m driven piles for problematic soil conditions of the “New Mosque” in Astana city. Field test are carry out in accordance with requirements GOST 5686, for definitions of bearing capacity of the piles in accordance with requirements SP RK 5.01- 03-2013 and ASTM D4945. The test method is similar to that used on driven piles with the monitoring of hammer blows and subsequently analyzing the pile response to the stress wave propagation. A separate hammer or drop weight is usually brought to site to allow the dynamic load to be applied to driven pile. According to the results of tests were determined the possible depth of penetration and bearing capacity of driven piles. This geotechnical investigation is important for understanding the soil-pile interaction on difficult and problematical soil ground conditions related to the construction site.