Vibration sinking tube compaction pile model test device and test method

Abstract

The invention discloses a vibration immersed tube compaction pile model test device and a test method. The vibration immersed tube compaction pile model test device is characterized by comprising a transparent model groove, transparent soil for simulating soil around a pile and an immersed tube with pile shoes are arranged in the transparent model groove, a grouting pipe is arranged in the center of the immersed tube, and a pile sinking mechanism mounted on a support is arranged above the transparent model groove. A laser source is arranged on one side outside the transparent model groove, digital cameras capable of observing a transparent model groove space are arranged on a front view face and a top view face of the outside of the transparent model groove, and the digital cameras are connected with a processing device through data lines. The vibration immersed tube compaction pile model test device is easy and convenient to operate and high in repeatability; the prepared transparent soil and natural soil are good in soil nature similarity; according to the test method, the squeezing effect of a vibration immersed tube compaction pile under the conditions of different natures of the soil around the pile, different immersed tube section forms, different pile diameters and different pile lengths can be observed and measured in a visual mode; the vibration immersed tube compaction pile model test device and the test method have important significance in design and construction for guiding influences on surrounding buildings by pile-forming construction of vibration immersed tube piles.

Description

technical field [0001] The invention relates to a model test of a building pile foundation, in particular to a model test device and a test method for a vibrating tube sinking compaction pile model test device and a test method, in particular to a model test device and a test method for a visualized vibration sinking tube compaction pile model test device. Background technique [0002] The compaction pile is a pile formed by pressing or driving a steel pipe with a pipe plug, valve or cone head into the underground compacted soil layer to form a hole, and then putting lime, sand and other fillers into the hole. As compaction piles are soil-squeezing piles, the impact between adjacent foundation piles and the influence of foundation piles on surrounding structures during construction has always been one of the key issues concerned by engineering and technical personnel. [0003] In the model test of geotechnical engineering, it is of great significance to explore the nature of...

AI Technical Summary

Problems solved by technology

The traditional soil deformation measurement method is to bury a series of sensors inside the soil to obtain the displacement of some discrete points, but the sensors are easily affected by the disturbance of the external environment, and the measurement results are often not accurate enough, and at the same time, the continuous deformation inside the soil cannot be given. entire displacement field

Modern digital image technology is only limited to measuring the macroscopic or boundary deformation of the soil, and cannot visualize the internal deformation of the soil.

Although X-ray, γ-ray, computer tomography (CAT scan) and magnetic resonance imaging (MRI) can be used to measure the continuous deformation inside the soil, the high cost limits the wide application of these technologies

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