A test device and method for testing dynamic shear characteristics between pipe piles and grouted soil

Abstract

The invention discloses a test device and method for testing the dynamic shear characteristics between pipe piles and grouted soil. The test device includes a vibration platform, a pipe pile model test box, a loading mechanism and a monitoring system. The pipe pile model The test box includes a steel bottom plate, a stacked steel frame, a limit mechanism, pipe piles and sandy soil bodies arranged in the steel frame; guide chute is arranged between the steel frames, and balls are arranged on the guide chute; the steel bottom plate Hard soil is laid on the top; cement slurry is filled between the pipe pile and the sandy soil body; a sealing film is arranged on the inner wall of the steel frame; the monitoring system includes a displacement sensor, a strain rosette arranged on the outer surface of the pipe pile group and a pressure cell set in the sand body. The invention can better eliminate the influence of the boundary of the box wall, avoid the problem of scale effect and difficulty in determining the similarity ratio of the test model, and the test result is more accurate, reasonable and reliable, and provides reliable basic data for theoretical analysis and engineering practice.

Description

technical field [0001] The invention belongs to the technical field of civil engineering test devices, in particular to a test device and method for testing the dynamic shear characteristics between pipe piles and grouted soil. Background technique [0002] Since my country introduced prestressed concrete pipe piles and used them in large quantities, it not only saves a lot of various building materials, energy and funds every year, but also greatly shortens the construction period of the project. Pipe piles are a common form of foundation for buildings, and are mainly used for compression, pullout and horizontal force resistance of buildings. Because the high-strength prestressed concrete pipe pile consumes less building materials, the factory production efficiency is high, the pile quality is good, the strength is high, and it is resistant to driving. Therefore, in recent years, with the rapid development of the world's economic construction, the concept of energy conserv...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing test equipment and test methods are not targeted, the accuracy is not high, the boundary effect of the box wall, the scale effect, the test model, etc. For the technical problem that the similarity ratio relationship is difficult to determine, provide a dynamic shear test device and method for testing the relationship between the pipe pile and the grouted soil, which is easy to operate, accurate in test, and the test model is close to the actual engineering

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