Method for preparing big-size model test soil body

Abstract

The invention discloses a method for preparing a big-size model test soil body by layered compaction, comprising the following steps: deciding a filing scheme, processing before soil body filling, borrowing soil based on blocking, putting soil, smoothing in whole, compacting in whole, detecting compaction quality, burying test apparatus and devices, laying an identification layer, testing soil body texture by cone penetration test (CPT) or other in-situ testers and saturating model soil if necessary. In the invention, water content reduction by vacuum pumping, proper air drying in the sun and other methods and combination thereof are adopted to reduce water content of floury soil and silty soil and save labor and cost for drying and other methods. The filling quality and uniformity of the model soil can be accurately controlled by adopting the simple and reasonable filling steps, which is suitable for model tests with high requirements for model soil. The identification layer is laid in the filling layer if necessary, so that soil body deformation can be observed directly by post-test excavation or transparent observation windows on side walls.

Description

technical field [0001] The invention relates to a layered vibration preparation method of large-scale model test soil, in particular to a layered vibration preparation method of large-scale model test soil which requires high filling quality and uniformity of model soil. Background technique [0002] In geotechnical physical model experiments, in order to ensure the quality of the experiment and controllable experimental conditions, there are generally higher requirements for the density and uniformity of the model soil. When using a small-sized model box to carry out experiments, due to the small amount of earthwork and easy operation and control, the preparation and quality control of soil are generally easy to handle, and the quality of soil preparation can be guaranteed. When a large-scale model box is used, such as a giant model tank of 15m (length) × 5m (width) × 6m (height), the amount of earthwork is huge. How to prepare a well-uniform and density-controllable soil l...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: 1. The scope of application is small, and this method is only suitable for dry sand with uniform particle size

2. There are many factors affecting the soil layer filled by the falling rain method, and the quality of the filled soil is not easy to control

3. The density and strength of the prepared soil layer are low

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