Interesting Developments in Testing Methods Applied to Foundation Piles

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Sobala, Dariusz^1 ; Tkaczyski, Grzegorz^2

Rzeszow University of Technology, Faculty of Civil and Environmental Engineering and Architecture, al. Powstaców Warszawy 12, Rzeszów

35-959, Poland^1

METRIS Sp. Z O.o. Instytut Bada Dla Budownictwa., ul. Lkoszyska 127A, Kutno

99-300, Poland^2

关键词: Bi-directional loading;    Conventional testing;    Cooperation with university;    Integrity testing;    Low-energy impact;    New technologies;    Pile testing method;    Temporary support;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/2/022074/pdf
DOI  :  10.1088/1757-899X/245/2/022074

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Both: piling technologies and pile testing methods are a subject of current development. New technologies, providing larger diameters or using in-situ materials, are very demanding in terms of providing proper quality of execution of works. That concerns the material quality and continuity which define the integral strength of pile. On the other side we have the capacity of the ground around the pile and its ability to carry the loads transferred by shaft and pile base. Inhomogeneous nature of soils and a relatively small amount of tested piles imposes very good understanding of small amount of results. In some special cases the capacity test itself form an important cost in the piling contract. This work presents a brief description of selected testing methods and authors remarks based on cooperation with Universities constantly developing new ideas. Paper presents some experience based remarks on integrity testing by means of low energy impact (low strain) and introduces selected (Polish) developments in the field of closed-end pipe piles testing based on bi-directional loading, similar to Osterberg idea, but without sacrificial hydraulic jack. Such test is suitable especially when steel piles are used for temporary support in the rivers, where constructing of conventional testing appliance with anchor piles or kentledge meets technical problems. According to the author's experience, such tests were not yet used on the building site but they bring a real potential especially, when the displacement control can be provided from the river bank using surveying techniques.