Unified Seismic Loading Apparatus for Underground Cavern Simulation
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Solution Overview
Problem
Current methods for studying seismic dynamic responses of underground caverns lack high-fidelity simulations due to the inability to unify in-situ stress static loads and seismic dynamic loads, restricting research in this field.
Innovation Solution
A test apparatus and method that includes a loading frame, underground cavern model, static loading device, dynamic loading device, and measuring device, simulating real vertical and horizontal in-situ stresses through a convex structure model with integrated static and dynamic loading, allowing for high-fidelity simulation of seismic ground motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shaking table model test is used to study seismic dynamic response, then seismic stability evaluation is improved, but the ability to simulate real in-situ stress conditions is insufficient
Solution Approach 1:
The patent combines static loading device and dynamic loading device into a unified test system. The static loading device applies in-situ stress loads while the dynamic loading device applies seismic loads, and both are integrated on the same shaking table platform, allowing simultaneous simulation of real stress conditions and seismic dynamic response
Solution Approach 2:
The shaking table platform is designed to serve multiple functions: it supports both static loading applications and dynamic seismic loading applications. The loading frame can accommodate both types of loading devices, making the system versatile for comprehensive rock mass dynamics research
2Ease of operation
If separate static and dynamic loading tests are conducted, then test simplicity is maintained, but high-fidelity simulation of unified stress conditions is restricted
Solution Approach 1:
The patent merges separate static and dynamic loading capabilities into a single integrated test apparatus. The loading frame supports both static loading devices (for in-situ stress simulation) and dynamic loading devices (for seismic loads), enabling unified simulation of combined stress conditions without requiring multiple separate test setups
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
The apparatus provides accurate, high-fidelity simulation data for the seismic dynamic response of underground caverns, overcoming the limitations of previous methods by simulating real stress conditions and enhancing research capabilities.
Implementation Method 1
a dynamic load driving device for driving the model box and the bearing table to vibrate
Implementation Method 2
The static loading device includes a normal loading device and a lateral loading device... simulating real vertical and horizontal in-situ stresses
Implementation Method 3
The load measuring device includes a normal load measuring device for measuring a load value of the top of the overlying model and a lateral load measuring device for measuring a load value of the peripheral side of the overlying model
Implementation Method 4
The deformation measuring device includes a normal deformation measuring device for measuring a deformation value of the top of the overlying model and a lateral deformation measuring device for measuring a deformation value of the peripheral side of the overlying model
Data Source
AI summary
A test apparatus for simulating a seismic dynamic response of an underground cavern includes a loading frame, an overlying model and an underlying model of the underground cavern, a static loading device, a dynamic loading device and a measuring device. A vertical load and a horizontal load are separately applied by the static loading device to the overlying model to simulate real vertical and horizontal in-situ stresses of the in-situ underground cavern. A seismic dynamic load is applied by the dynamic loading device to the underlying model, and then acts on the overlying model to simulate a real seismic ground motion on the in-situ underground cavern. In this way, the present invention satisfies simulation requirements for the seismic dynamic response of the underground cavern to implement a high-fidelity simulation on the underground cavern through unified loading of the in-situ stress static load and the seismic dynamic load.