Static load test device for composite foundation

Abstract

The invention relates to a test device used in rock project, which provides a integrated groundsill stable loading test device to solve the problem that present test device can only test the whole stress and deformation and it can not test the working properties of post and soil at the same time when the stress and deformation are different with actual condition. It arranges a central support plate above the post; a circular support plate above the soil between posts; and a rigid support plate above the central and circular support plates while it connects said two plates with springs. Wherein, the central, circular and rigid support plates have a force sensor and a displacement sensor. The invention can synchronously test the whole stress and deformation of post and soil and their individual stress and deformation to attain the stress rate between them, to show the actual working property of post-soil integration.

Description

technical field [0001] The invention relates to a test device for geotechnical engineering, in particular to a static load test device for composite foundation. Background technique [0002] With the rapid development of engineering construction, foundation treatment methods are becoming more and more diversified. Composite foundation has been more and more widely used because of its unique advantages of fully utilizing the interaction between pile soil and pile body and relatively low engineering cost. Composite foundation technology has developed rapidly in recent years, and great progress has been made in terms of construction machinery, materials used, calculation theory, and construction technology, and it has played a huge role in industrial and civil construction. In the design of composite foundation, it is a unique core technology of composite foundation to set a cushion layer composed of granular materials with a certain thickness between the foundation and the pil...

AI Technical Summary

Problems solved by technology

[0007] (2) n is the pile-soil stress ratio, which cannot be obtained in existing tests, and only estimated values ​​can be used in calculations. The "Technical Code for Building Foundation Treatment" recommends taking 3 to 4, and the performance of the joint action of piles and soil cannot be obtained. , the composite foundation bearing capacity f cannot be calculated correctly spk

In fact, the working performance during the test in the current test method does not match the actual engineering stress conditions, and the measured overall stress and deformation when the pile and soil act together are not the real stress of the pile-soil composite foundation. Properties of Force and Deformation

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