A preparation method of clay model foundation for restoring prototype state and strength

Abstract

The invention discloses a method for preparing a clay model foundation for restoring prototype state and strength. Including determining the total thickness and layering of the prototype foundation and the model foundation; obtaining the undrained shear strength of each layer of the prototype foundation; calculating and obtaining the state parameters of the middle part of each layer of the prototype foundation and the average effective value of each layer of the model foundation Consolidation compressive stress; determine the indoor compression consolidation line of the prototype foundation soil and the slope of the unloading springback line, and obtain the initial void ratio of each layer of the model foundation soil through inversion; and prepare the model foundation layers. On the premise of restoring the state and strength of the prototype foundation, the present invention improves the economy and ease of operation of model foundation preparation, expands the range of model foundation preparation, overcomes the problem of sensor misalignment that may occur in the centrifugal model preparation process, and improves the model performance. The economy of preparation and the flexibility of sensor arrangement ensure the accuracy of centrifugal model tests.

Description

Technical field [0001] The present invention belongs to the technical field of physical model test theory, and is specifically related to a method of restoring prototype state and strength. [0002] technical background [0003] There is a large number of soft-clad land found in our engineering construction, and most of the soft and sticky land foundations are distributed in the southeastern coastal areas of the Pearl River Delta and the Yangtze River Delta. These regional economic, large infrastructure have been built or under construction. Since the natural water content of soft clay itself, the pore ratio, sensitivity, the thirmeton, the penetration is poor, and has a significant structure, low shear strength, poor physical mechanical mechanical properties, etc., sticky land loss There is a situation in steady failure. Therefore, in the adhesive land based on large geotechnical structures such as dikes, high-profile builders such as dikes, and often cause more disaster, leading...

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Problems solved by technology

[0011] In order to solve the problem of preparing the clay model foundation in the large-scale problem of the prototype site simulated by the high-gravity physical model test, the invention discloses a method for preparing the clay model foundation to restore the prototype state and strength. The basic idea is to control the clay model foundation The strength, stress state and density are equivalent to those of the prototype foundation soil under the same stress field, so that the centrifugal test results of the model foundation are the true response to the prototype foundation

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