Calcareous sand dynamic-static load multi-functional pile foundation model test device

Abstract

The invention discloses a calcareous sand dynamic-static load multi-functional pile foundation model test device and relates to a model test technology for pile foundation engineering. The structure of the device is as follows: a hydraulic lifting unit is arranged at the bottom of the whole bracket, a model box is arranged on the hydraulic lifting unit, the model box is filled with calcareous sand, and a model pile is arranged in the calcareous sand; a water level fluctuation system is connected with the model box; the fixed ends of a vertical load applying part, a horizontal load applying part, a hydraulic loading part and a pneumatic loading part are separately arranged on the whole bracket, and the movable ends of the vertical load applying part, the horizontal load applying part, the hydraulic loading part and the pneumatic loading part are separately connected with the model pile; and an induction acquisition system is separately connected with the model pile and the model box. The device can apply various types of load on the model pile and particularly can simulate applying various complicated loads in a marine dynamic environment and obtain parameters related to the pile and earth interaction process of the model pile under complicated load action.

Description

technical field [0001] The invention relates to the model test technology of pile foundation engineering, in particular to a calcareous sand dynamic and static load multifunctional pile foundation model test device, which mainly relates to the pile foundation model test, which can simulate various complex loads in the marine dynamic environment and obtain the model The relevant parameters of the pile-soil interaction process under complex loads. Background technique [0002] Model test is a test method that fully considers similar conditions such as geometric similarity, physical similarity and motion similarity, and combines the actual needs to artificially control the proportion of model objects, load size, direction, point of action and environmental parameters through the method of scaling. At present, the pile foundation model test mainly includes the tests of static load and dynamic load. According to the current geotechnical code, the static load test mainly adopts t...

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Problems solved by technology

In the process of single pile bearing capacity, sometimes the deformation of the pile itself and the way of pile-soil interaction must also be considered. For example, parameters such as the pressure on the soil and the pore water pressure of the soil itself need to be measured. The existing piles In the foundation model test, on the one hand, the complexity of the load in the pile foundation model test is less considered, and on the other hand, the collection of relevant parameters in the soil during the pile-soil interaction is also lacking

[0004] The pile foundation model test involved in marine engineering is subject to complex loads, and there are many requirements for the simulation and application of loads. At the same time, the number of collected parameters is large, and many types of model tests are required to simulate environmental loads. The current The practice often needs to be measured separately, that is, to make multiple sets of model devices to carry out tests separately, which not only consumes time, but also cannot comprehensively consider the superposition of multiple loads

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