Test device of model for manufacturing rock masses containing interlayers and test method thereof

Abstract

The invention discloses a test device of a model for manufacturing rock masses containing interlayers and a test method thereof. The test device of the model for manufacturing the rock masses containing interlayers comprises a semicircular angle device, an upper baffle, a lower baffle, a left side plate, a right side plate, a circular turntable, a core-drilling machine drill bit, a flat plate, a flat plate angle control rod, a fixed screw rod, a base plate, an interlayer model test piece, a U-shaped plate and a guide slot. The test method comprises the following test steps: arranging the rock masses according to an outline central line and fixing the rock masses; manufacturing interlayer materials and casting the model, fastening the test piece, drilling the core, replacing the core-drilling machine drill bit, changing the position of the test piece to drill repeatedly and cutting to obtain the test pieces with different height-diameter ratios or obtain the test pieces with different interlayer inclination angles; then carrying out mechanical test. The test device is simple in structure and suitable for manufacturing the test pieces with different interlayer thicknesses, inclination angles and height-diameter ratios; according to a core-drilling and cutting machining device, by making full use of the existing device, the influence on the mechanical properties of the test pieces caused by different conditions can be analyzed, coring of irregular rock samples taken in the site can be carried out directly, so that the test efficiency is improved and the test time is shortened.

Description

technical field [0001] The invention relates to rock-soil mechanics test technology, in particular to a model test device and test method for making interlayer rock mass. Background technique [0002] Interlayered rock mass, also known as slab-cracked rock mass, refers to a rock mass distributed with a group of absolutely dominant structural planes (such as bedding planes, schistosing planes, etc.). Sedimentary rocks with layered structures in nature account for 2 / 3 of the land area, and a large number of rock mass stability problems with interlayers will be encountered in human engineering activities. The strength depends not only on the strength of the complete rock block, but also the development degree of the dominant structural plane often plays a decisive role in the stability of the layered rock mass engineering. The layered rock mass is affected by factors such as groundwater seepage and earthquakes, and is prone to landslides, collapses and other geological conditio...

AI Technical Summary

Problems solved by technology

However, the existing physical model tests are generally based on plane models, and the design interlayer dip angles are all in the horizontal direction, which cannot simulate the real state of rock mass joints with interlayers.

[0004] However, the field test method has the following deficiencies: 1. When sampling the layered rock mass in the field, the natural interlayer shale is affected by size, drilling depth and site complexity, so it is very difficult to obtain, and the thickness and inclination angle of the rock mass interlayer They are all randomly distributed and lack regularity for the study of their mechanical properties; 2. On-site sampling cannot replicate a large number of layered rock masses under the same conditions

[0005] Although the numerical simulation analysis method can quickly change the physical properties of the simulated layered rock mass, and the calculation process is less time-consuming than the laboratory test process, in general, the layered rock mass is heterogeneous and anisotropic, and often It has strong nonlinearity, and the material defined by the numerical simulation cannot reflect the characteristics of the deformation of the rock block itself, which will affect the correct simulation of the stability process of geotechnical engineering and the reliability of the final results

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