TBM-Mounted Rock Wear Testing System
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Solution Overview
Problem
Current methods for testing the wear resistance of surrounding rock in TBM excavation tunnels are time-consuming, costly, and fail to accurately replicate the in-situ stress state of the rock, making them unsuitable for rapid and accurate testing required for efficient tunnel construction.
Innovation Solution
A TBM-mounted system that includes a fixing module, a surrounding rock polishing module, and a wear resistance testing module, allowing for in-situ polishing and testing of the rock, minimizing damage and enabling real-time, accurate wear resistance measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If indoor testing with drilled sampling is used, then wear resistance testing can be performed, but the testing process becomes time-consuming and costly
Solution Approach 1:
The patent extracts the testing function from the indoor laboratory environment and relocates it directly to the TBM construction site. The testing device is mounted on the TBM itself, allowing wear resistance measurements to be performed in-situ at the excavation location, eliminating the time-consuming processes of drilling samples, transporting them to the lab, and preparing them for testing.
Solution Approach 2:
The TBM performs its own wear resistance testing through the mounted device. The system uses the TBM's own operational conditions (rock contact, stress state, excavation speed) to conduct real-time wear resistance measurements without requiring external laboratory facilities or sample preparation, enabling the machine to self-diagnose rock properties during construction.
2Measurement precision
If drilling for sampling is performed, then rock samples can be obtained for testing, but the surrounding rock stress state is damaged and cannot be reproduced
Solution Approach 1:
The patent eliminates the drilling and sampling extraction process entirely. Instead of removing rock samples that would alter the stress state, the testing device measures wear resistance directly on the rock in its original in-situ position, preserving the natural stress conditions while obtaining accurate measurements.
Solution Approach 2:
The rock itself serves as the test specimen without requiring extraction. The testing mechanism contacts and measures the rock directly at the excavation site, using the rock's own stress state and structural integrity as the measurement basis, thereby avoiding any harmful drilling or sampling operations.
3Measurement precision
If indoor testing is used, then wear resistance can be measured, but it cannot meet the requirements for rapid excavation and rapid testing
Solution Approach 1:
The patent merges the wear resistance testing function with the TBM excavation operation. The testing device is integrated onto the TBM, allowing simultaneous excavation and testing to occur during the same operational cycle. This eliminates the separate, time-consuming indoor testing process and provides real-time wear resistance data that directly supports rapid excavation decision-making.
Solution Approach 2:
The testing operation continues uninterrupted during the excavation process. As the TBM progresses through the rock, the mounted device continuously performs wear resistance measurements on the surrounding rock, providing an unbroken stream of data that matches the continuous nature of tunnel excavation, thereby supporting rapid construction schedules.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system facilitates rapid, accurate, and cost-effective wear resistance testing directly on the construction site, reducing sample processing time, minimizing rock damage, and providing real-time data for guiding tunnel excavation.
Implementation Method 1
a surrounding rock polishing module, arranged on the movable end, the surrounding rock polishing module includes a polishing mechanism for polishing a surrounding rock test area
Data Source
AI summary
A TBM-mounted surrounding rock wear resistance testing system and method, the system including: a fixing module, arranged on a TBM, the module has a movable end for extending to the surrounding rock of a tunnel; a surrounding rock polishing module on the movable end, the module includes a polishing mechanism for test area; a surrounding rock wear resistance testing module on the movable end, follows the movable end moving the test area, and including a mechanism for testing the wear resistance of the polished test area and a drive mechanism thereof; and a central control module, configured to control the motion states and operations of the fixing module, the surrounding rock polishing module and surrounding rock wear resistance testing module, and determine the wear resistance of the surrounding rock according to the wear resistance test result. The system can polish tunnel surrounding rock during TBM excavation and test wear resistance.