Deformable Bracket and Silicone Tube for Karst Cave Filling
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Solution Overview
Problem
Traditional methods for filling and reinforcing karst caves during tunnel construction in karst areas are inefficient due to long grouting times, high material consumption, and limitations in passing larger block stones through grouting holes, especially in groundwater-rich areas, leading to unstable tunnel environments and increased construction costs.
Innovation Solution
A method using a deformable bracket, an elastic silicone tube, and a lock apparatus to inject silicate resin and steel fiber-reinforced grout, forming a 'block stone like' structure within the karst cave, which stabilizes the cave and reduces construction risks and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional grouting process is used to reinforce karst cave, then reinforcement effect is achieved, but grouting time is long and material consumption is high
Solution Approach 1:
The patent changes the physical state and composition parameters of filling materials by introducing silicate resin that undergoes rapid polymerization, transforming from a liquid state to a solid gel state quickly. This parameter change enables fast setting and reinforcement of karst caves, dramatically reducing grouting time while maintaining reliability
Solution Approach 2:
The patent uses composite materials combining silicate resin with steel fibers and other additives to create a filling material that sets rapidly while providing strong reinforcement. This composite approach achieves both fast setting (reducing time loss) and effective karst cave stabilization (maintaining reliability)
2Reliability
If block stones are put into karst cave through grouting hole, then reinforcement effect is improved, but grouting hole diameter limits the size of block stones that can be passed
Solution Approach 1:
The patent employs a flexible silicone tube as a carrier that can be inserted through the limited grouting hole diameter. The tube's flexibility allows it to pass through narrow openings, and its thin-walled structure enables it to be collapsed or compressed for insertion. Once in position, the tube delivers large block stones and filling materials directly to the karst cave without being constrained by the grouting hole diameter
Solution Approach 2:
The silicone tube acts as an intermediary device between the surface equipment and the karst cave interior. It mediates the transfer of large block stones and filling materials through the constrained grouting hole by providing a flexible conduit that can be inserted and then expanded or opened at the destination, bypassing the diameter limitation of the grouting hole
3Reliability
If grout is injected into karst cave, then reinforcement is achieved, but in groundwater rich area filling and reinforcement region cannot be formed easily
Solution Approach 1:
The patent changes the chemical and physical parameters of the filling material by using silicate resin that undergoes rapid polymerization upon injection. This parameter change creates a fast-setting material that hardens before groundwater can disperse it, enabling successful reinforcement even in groundwater-rich areas where traditional slow-setting grout would fail
Solution Approach 2:
The patent applies preliminary action by injecting silicate resin that rapidly polymerizes to form a stable filling region before groundwater can interfere with the reinforcement process. The fast-setting characteristic creates a preliminary stable structure that resists groundwater dispersion, ensuring proper reinforcement region formation
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 method efficiently stabilizes karst caves, ensures safe tunnel construction, reduces construction costs, and enhances engineering speed by forming a stable 'block stone like' structure within the cave, effectively addressing the limitations of traditional methods.
Implementation Method 1
the elastic silicone tube is a long film tube made of an elastic silicone material, and the long tube may be propped up without breaking with the filling of the filling material
Implementation Method 2
silicate resin materials are filled into the elastic silicone tube first to implement fast expansion and reinforcement
Implementation Method 3
injecting steel fiber reinforced grout that is stirred evenly into the grouting pipe under the control of a grouting device to fill the elastic silicone tube at the bottom of the borehole conduit to implement a 'block stone like' structure
Data Source
AI summary
The present invention relates to method for filling deformable karst cave, and the steps are: penetrating a grouting pipe into an elastic silicone tube, penetrating the grouting pipe and the elastic silicone tube into a deformable bracket, and lowering into a karst cave; sealing the elastic silicone tube, injecting silicate resin materials into the grouting pipe, and injecting steel fiber reinforced grout to implement a “block stone-like” structure; sealing the elastic silicone tube, separating the “block stone-like” structure from the elastic silicone tube to complete a “block stone-like” structure; lowering the elastic silicone tube and the deformable bracket, sealing the elastic silicone tube, lowering the elastic silicone tube and the deformable bracket tore construct the “block stone-like” structure, and completing the filling. The present invention may effectively stabilize the karst cave, ensure safe tunnel construction and stable surrounding rocks, and improve engineering construction speed.