New stratum material and its preparation method for simulating alluvial-diluvial composite strata in the Yellow River area

Abstract

The invention relates to a novel stratum material for simulating alluvial-diluvial composite stratum in the Yellow River area, which is composed of two model soils, model silty clay and model sandy pebble soil. The model silty clay and model sand and pebbles can simulate different combinations of alluvial-diluvial composite strata in the Yellow River area by changing the angle α. Barite powder 500-515 parts, clay 630-645 parts, fine sand 1270-1280 parts, fine quartz sand 510-515 parts, vaseline 40-45 parts, silicone oil 20-25 parts, water 210-220 parts, various materials Mix evenly to obtain model silty clay. 2000-2150 parts of fine sand, 400-435 parts of coarse sand, 400-435 parts of barite powder, 70-80 parts of water, and the model sand pebble soil can be obtained by mixing various materials evenly. The model soil takes into account the unique physical and hydraulic properties of silty clay and sandy pebbles in the alluvial-diluvial composite stratum in the Yellow River area, and can more accurately satisfy the similarity with the prototype soil. The parameters vary widely, the mechanical properties are stable, and the raw material price Cheap and easy to obtain, easy to prepare.

Description

technical field [0001] The invention relates to the preparation of a novel formation material, in particular to a novel formation material for simulating the alluvial-diluvial composite formation in the Yellow River area and a preparation method thereof. Background technique [0002] The strata in the Yellow River area of ​​Jinan are mainly Quaternary Holocene (Q4) and Upper Pleistocene (Q3), mainly composed of alluvial and alluvial silty clay and sandy pebble layers, partially interspersed with thin fine sand layers. It is the main material component of the sloping plain in the piedmont and the middle and upper part of the Yellow River alluvial fan. [0003] The model test can simulate various relatively complex boundary conditions, and can comprehensively and vividly present the stress and failure mechanism, deformation mechanism, shape and instability stage of the engineering structure and related rock and soil mass. Therefore, for a long time, the model test method has ...

AI Technical Summary

Problems solved by technology

These model soil materials often fail to consider the effect of groundwater, so they are not suitable for fluid-solid coupling models; secondly, different model tests have different similarity ratio requirements, resulting in different physical and mechanical parameters of the model soil, so the material ratio is also inconsistent

Images