Penetrated crack rock mass grouting slurry diffusion test method

Abstract

The invention discloses a penetrated crack rock mass grouting slurry diffusion test method. According to the method, based on site observation parameters, by means of the 3D printing technology, a hollow rock mass crack skeleton is constructed, monitoring elements are laid on the surface layer, the end portions and the joints of each crack, and the outer surface layer thickness of the skeleton meets similar rock mass strength attribute requirements; the hollow crack skeleton is connected with spotting capillary tubes, and thus the water saturation in the cracks is controlled; based on the skeleton, rock mass gravel similar to the rock mass gravel in a site is laid and subjected to cooling treatment, prestress corresponding to ground stress is applied on the two sides for compaction, drilling is conducted in proportion for going deep and then penetrating the cracks through perforation, and by means of a grouting pump, high temperature grouting is conducted on the interiors of the cracks; by means of a PC terminal and a thermal inductance instrument, the grouting process is observed, after grouting is completed, a device is detached, and the diffusion form of grouting in the cracks is observed. The method is simple to operate, real-time diffusion of the grouting in penetrated crack rock mass and stress distribution during grouting are easily and truly reflected, and thus the method is an efficient test method for studying a complex crack rock mass grouting technology.

Description

technical field [0001] The invention relates to a test method for studying the grout diffusion law, diffusion range and surrounding rock stress and strain changes in a cracked rock mass under grouting conditions, in particular to a test method for grouting grout diffusion through a cracked rock mass. Background technique [0002] As a mature construction technology, grouting reinforcement technology has been widely used in mining engineering, tunnel engineering, foundation engineering, water conservancy engineering and other fields, and has a history of more than 200 years. At present, extensive research has been carried out on grouting theory and grouting effect, but the relationship between theoretical research and engineering application is still in its infancy, especially the test methods for grout diffusion law and plugging and reinforcement effect are still in the development stage. The test methods for porous media, test methods for static water conditions, and test m...

AI Technical Summary

Problems solved by technology

[0003] However, due to the complexity and concealment of engineering rock mass, the research on grouting technology mostly focuses on simplified numerical research and idealized experimental research, especially the complexity of the fracture network of fractured rock mass. There is a lack of test methods that consider the grout diffusion law and its influence in the complex through-fissure network, and there are few test methods that consider real conditions such as roughness, fracture crossing action, water pressure, and ground stress changes while studying the grouting process.

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