Underground Buffer Layer Structure With Energy-Dissipating Plates
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Solution Overview
Problem
Existing buffer layer support structures in underground engineering face issues such as long curing times, labor-intensive assembly, non-fireproof materials, discontinuous stress points, and gaps that compromise waterproofing and structural integrity, particularly in soft and weak rock masses.
Innovation Solution
A fabricated underground engineering buffer layer support structure comprising flexible energy dissipation components with porous lightweight materials and wave-shaped plates, connected to form integrated structural bodies, which absorb and dissipate energy through deformable channels, providing continuous stress distribution and fire-resistant properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If filling type support structures (foam concrete, ceramsite light soil) are used, then the buffer layer can be cast-in-place, but the curing time is long and template disassembly and assembly requires great labor
Solution Approach 1:
The support structure is divided into modular units (first structural plate, second structural plate, flexible energy dissipation component) that can be pre-fabricated and then assembled on-site, eliminating the need for long curing times associated with cast-in-place materials
Solution Approach 2:
The patent introduces a flexible energy dissipation component as an intermediary element between the structural plates, which can be easily installed and provides the necessary buffering function without requiring lengthy curing processes
2Ease of operation
If polyurethane and polyethylene foam are used for buffer layer, then the material is convenient to pave, but it is non-fireproof and not suitable for mine engineering
Solution Approach 1:
The patent uses composite materials combining structural plates with fire-resistant flexible energy dissipation components, maintaining the ease of installation while providing necessary fire protection for mine engineering applications
3Ease of operation
If non-filling type support structures with thin-walled circular steel pipes are used, then the installation is convenient, but the stress points are discontinuous causing overlarge local stress and interlayer gaps
Solution Approach 1:
The patent extracts the energy dissipation function from discrete pipe elements and integrates it into a continuous flexible energy dissipation component that spans between structural plates, providing continuous stress distribution while maintaining installation convenience
Solution Approach 2:
The structural plates and flexible energy dissipation component are merged into an integrated assembly that provides both structural support and continuous stress distribution, eliminating the discontinuities present in discrete pipe installations
4Ease of manufacture
If discrete point support structures are used, then the installation is simple, but interlayer gaps and pavement gaps are caused which are not conducive to waterproof structure implementation
Solution Approach 1:
The structural plates and flexible energy dissipation component are pre-assembled into integrated units before installation, ensuring continuous coverage and eliminating gaps that would compromise waterproofing, while maintaining simple installation through modular assembly
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 structure effectively dissipates energy, ensures even stress distribution, maintains waterproof integrity, and enhances structural stability while being easy to install and adaptable to various tunnel configurations, addressing deformation and seismic hazards.
Implementation Method 1
the first porous lightweight material is squeezed, gas inside the first porous lightweight material is squeezed and released through the first buffering energy absorption channels
Implementation Method 2
dissipates some of the deformation energy of the surrounding rock through constant-resistance deformation in the compression process of the volume of the buffer layer
Implementation Method 3
the first plate is of a wave shape... ensures even stress distribution
Implementation Method 4
absorbs the harmful deformation of the surrounding rock and dissipates some of the deformation energy of the surrounding rock through constant-resistance deformation in the compression process
Data Source
AI summary
The present invention provides a fabricated underground engineering buffer layer support structure, comprising first structural plate, having a first surface and a second surface, and being connected to an initial support layer through the first surface; second structural plate, having a third surface and a fourth surface, and being connected to a secondary lining layer through the fourth surface; flexible energy dissipation component, being arranged in first buffering energy dissipation space formed between the second surface and the third surface and filled with first porous lightweight material that is arranged on a periphery of a wave-shaped plastic-material first plate in a wrapping manner. The flexible energy dissipation component is arranged at an arch ring, an inverted arch, and an arch foot with single layer or multiple layers, and a layer thickness of the flexible energy dissipation component and strength and density of the porous lightweight material can be designed non-uniformly.