Rock Mass Shear Test System for High-Energy CT Scanning
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Solution Overview
Problem
Existing rock mass shear test systems for high-energy accelerator CT scanning face limitations in accurately visualizing the shearing progressive failure process due to the loading cylinder's presence in the scanning field, which prevents all-direction scanning and inaccurate characterization of crack development.
Innovation Solution
A rock mass shear test system with a shear box and bearing device configuration that includes double horizontal loading devices and a normal loading device, allowing the loading cylinder to be staggered relative to the rock mass sample, enabling accurate high-energy accelerator CT scanning of crack incubation, initiation, and propagation during the shearing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a loading cylinder is disposed on the outer side of the rock mass sample in the shear test system, then the shear force can be applied to the rock mass sample, but the loading cylinder will appear in the field of view of the CT scanner, leading to inaccurate scanning results and preventing all-direction scanning
Solution Approach 1:
The patent repositions the loading cylinder from a horizontal arrangement (where it would block the CT scanning path) to a vertical arrangement above the shear box. This dimensional change allows the CT scanner to scan the rock mass sample from all directions without the loading cylinder interfering with the field of view, while still enabling effective shear force application through the vertical loading mechanism.
2Measurement precision
If the loading cylinder is positioned to avoid the scanning field, then accurate CT scanning can be performed, but the device complexity increases due to the need for special bearing devices and double horizontal loading devices
Solution Approach 1:
The patent integrates the bearing device and loading devices into a unified structure where the vertical bearing device supports both the shear box and the horizontal loading devices. This merging reduces overall system complexity by eliminating separate support structures and creating a coordinated mechanism where components work together efficiently.
Solution Approach 2:
The bearing device serves multiple functions: it supports the shear box, enables vertical movement of the loading devices, and provides a stable platform for applying shear forces. This multi-functionality reduces the need for additional specialized components, thereby simplifying the overall device structure while maintaining scanning accuracy.
3Device complexity
If a conventional shear test system is used, then the structure is simple, but it cannot achieve comprehensive visualization of the shearing progressive failure process due to the loading cylinder blocking the scanning path
Solution Approach 1:
The patent extracts the loading cylinder from the horizontal scanning plane and repositions it vertically above the shear box. This extraction removes the obstruction that was blocking the CT scanning path, allowing comprehensive visualization of crack incubation, initiation, propagation, and penetration throughout the rock mass sample without information loss.
Data Source
AI summary
A rock mass shear test system for high-energy accelerator computed tomography (CT) scanning includes double horizontal loading devices, a first bearing device for bearing a static shear box, a second bearing device for bearing a dynamic shear box, and a normal loading device, etc. In the test, the double horizontal loading devices simultaneously apply an identical loading force to the rock mass, and the normal loading device applies a shear force to the rock mass. The double horizontal loading devices are provided in parallel and spaced apart, a loading force is applied in the horizontal direction, and a shear force is applied in the vertical direction, so that the loading cylinder and the rock mass sample are effectively prevented from interfering with each other during the accurate scanning process of the shearing progressive failure process of the rock mass.