The experience in applying of static load and O-cell pile testing geotechnologies in problematical soil conditions of Astana

抄録

The symbol of the exhibition EXPO-2017 will be the Kazakhstan platform itself made in the sphere form several floors high with 24000 m2 in total. The symbol of the exhibition is located in the center of the exhibition village. It is surrounded by international, thematic and enterprise platforms. The results and comparing of soil tests of the piles for following methods: Vertical static test Static Load Test (hereinafter SLT) and the Bi-Directional Static Load Test (hereinafter BDSLT). Experienced bored piles with a length of 31.5 m, diameter 1000 mm. Bi-directional static load tests and Static load tests carried out in accordance with ASTMD1143. The method proposed by George Osterberg, allows to simultaneously determining the estimated soil resistance under the lower end of piles and on its lateral surface. Feature of O-cell test is that the load is applied not on the pile head, and the body of the pile, where is a jack (power cell), which works in two directions. Power cell (O-Cell) shares the experimental pile into two parts: upper (upper test item) and the bottom (lower test item). The target of this tests was obtaining of bearing capacity of piles on problematical soils ground of Expo 2017 (Astana, Kazakhstan).