Device for detecting inner and outer rubbing resistance of steel pipe piles

Abstract

The invention discloses a device for detecting inner and outer rubbing resistance of steel pipe piles. The device comprises an outer steel pipe pile (1) and an inner steel pipe pile (2) which are nested together, and the top ends of the outer steel pipe pile (1) and the inner steel pipe pile (2) are aligned to be jointly fixed to the lower surface of a pile top cushion plate (4); the bottom end ofthe inner steel pipe pile (2) stretches out of the bottom end of the outer steel pipe pile (1); pile bottom sealing ports (5) are formed in the bottom ends of the outer steel pipe pile (1) and the inner steel pipe pile (2), and each comprise a steel cushion plate (6) and a flexible sealing gasket (7); strain pieces (3) are pasted to the outer surface of the outer steel pipe pile (1) and the outersurface of the inner steel pipe pile (2); and a protective device (8) is fixed to the outer surface of the outer steel pipe pile (1). The device for detecting the inner and outer rubbing resistance of the steel pipe piles is applied to detection of the inner rubbing resistance and the outer rubbing resistance borne by the pipe piles in the pile sinking process of the steel pipe piles, the devicehas the beneficial effects of being simple, fast to operate, convenient to apply and the like, and wide application prospects are achieved in steel pipe pile research.

Description

technical field [0001] The invention relates to a device for detecting internal and external frictional resistance of steel pipe piles, which belongs to the application field of pile foundations. Background technique [0002] In recent years, steel pipe piles have been widely used in engineering. Due to the opening at the bottom of steel pipe piles, soil pours into the pile pipe during the pile sinking process, forming soil plugs and increasing the resistance of pile sinking. The correct judgment of the occlusion effect of soil plugging has an important impact on the driveability and bearing capacity prediction of piles. Many scholars at home and abroad have carried out a lot of research work on this problem. The soil plug is formed due to the frictional resistance between the inner wall of the pipe pile and the soil core, and the design according to the standard calculation formula ignores the internal frictional resistance between the soil plug section and the steel pipe p...

AI Technical Summary

Problems solved by technology

At present, the research on the internal friction resistance of the soil plug section is not mature enough, and more accurate testing methods are urgently needed for further research

Images