Multifunctional model test pile

Abstract

The invention discloses a multifunctional model test pile which comprises a pile top, a pile body, a tensile retaining ring, a pull ring, miniature earth pressure cells and a pile end. The pile top is provided with a spherical hinge and a wiring connection piece, the spherical hinge and the wiring connection piece are connected with the pile body, a plurality of grooves are reserved in the pile body, the grooves are internally provided with the miniature earth pressure cells, the tensile retaining ring is arranged on the pile body in a sleeving mode and can be fixed, the pull ring is arranged on one side of the tensile retaining ring, the other end of the pile body is internally provided with a vertical force sensor, the force sensor is connected with a pile tip through a force transfer rod, a sponge ring is arranged in a gap between the pile tip and the pile body, and the measurement wires of the miniature earth pressure cells and the force sensor are guided out of circular holes in the wiring connection piece from the interior of the pile body. By means of the model pile, the earth pressure along a pile and the pile end resistance of the pile in a soil bed can be measured, the problem of interference of an original pile soil stress field through a general test and measurement mode is solved, a vertical load test, a horizontal load test and an anti-drawing test of the pile can be simulated, and the multifunctional model test pile has the advantages of being high in accuracy, wide in application range and easy and convenient to operate.

Description

technical field [0001] The patent of the invention relates to the technical field of civil engineering, in particular to a multifunctional model test pile. Background technique [0002] With the widespread application of pile foundations in building structures, the research on the bearing mechanism of pile foundations is becoming more and more important. Scaled-scale model test and field full-scale test are essential for the study of the bearing mechanism of pile foundation. On-site full-scale tests have certain advantages due to consideration of the actual on-site environmental conditions, but the test costs are too high and the test conditions are not easy to control; however, model test research has many advantages, such as providing a controlled test environment, and can be more economical Carry out studies with different experimental parameters. Therefore, the indoor scale model test research on the related characteristics of piles has become one of the important meth...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the patent of the present invention is to provide a multifunctional model test pile that can be used in multiple loading type model tests in order to solve the problems that the stress measurement method of the existing model pile is complicated and inconsistent with the real stress. The pile can not only measure the resistance at the pile tip and the lateral stress of the pile body at different positions of the pile body, but compared with the traditional measurement method, the disturbance of the stress field around the pile is small, and the measured data is closer to reality. Load test, horizontal load test and pull-out test reduce test workload and improve test convenience

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