Soluble Crystal Grouting Structure for Slope Drainage
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Solution Overview
Problem
Existing negative pressure drainage technologies for slopes face challenges in maintaining permeability of the water-permeable borehole section and preventing the grouting slurry from entering, leading to pressure control issues and potential failure during construction.
Innovation Solution
A grouting structure filled with solid soluble crystals, where the permeable pipe is filled with crystals that support the water-stop component and increase grouting pressure, reducing porosity and enhancing sealing, while the crystals dissolve to change osmotic pressure and facilitate groundwater flow, preventing slurry intrusion and ensuring a negative pressure environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressure of grouting is increased to ensure the borehole section is closed and negative pressure is formed, then the sealing effect is improved, but the slurry may break through the water-stop ring and enter the water-permeable borehole section, causing borehole failure
Solution Approach 1:
The permeable pipe filled with soluble crystals acts as an intermediary structure between the water-permeable section and the grouting section. The soluble crystals provide temporary support to the water-stop ring during high-pressure grouting, preventing slurry from breaking through while allowing the grouting pressure to effectively close the borehole section. After grouting, the crystals dissolve and release, maintaining the permeability of the water-permeable section.
Solution Approach 2:
The invention changes the physical state of the support material from permanent to temporary by using soluble crystals. The crystals are in a solid state during grouting to provide structural support, then dissolve into solution after grouting to restore permeability. This parameter change (from solid to dissolved state) allows the same structure to serve different functions at different stages.
2Object-affected harmful factors
If the pressure of grouting is reduced to prevent slurry from entering the water-permeable borehole section, then the water-stop ring is protected from damage, but the borehole section cannot be properly closed and negative pressure cannot be formed
Solution Approach 1:
The soluble crystals change their physical state from solid (providing mechanical support during grouting) to dissolved solution (allowing permeability after grouting). This parameter change enables the system to withstand high grouting pressure without damaging the water-stop ring, while subsequently allowing the formation of negative pressure in the water-permeable section.
Solution Approach 2:
The soluble crystals are placed in the permeable pipe before grouting to provide preliminary support to the water-stop ring. This preliminary action enables the system to withstand the high pressure of grouting without compromising the water-stop ring, and after the crystals dissolve, the negative pressure can be effectively formed.
3Productivity
If the water-permeable borehole section maintains its permeability for drainage, then the drainage function is achieved, but the grouting slurry may enter and block the permeable section, leading to system failure
Solution Approach 1:
The permeable pipe filled with soluble crystals serves as a protective intermediary that allows groundwater to pass through while blocking grouting slurry. The crystals provide structural support to prevent slurry from entering and blocking the permeable section, yet maintain the drainage function. After grouting, the crystals dissolve to fully restore the drainage capacity.
Solution Approach 2:
The permeable pipe transitions from a state where the crystals provide mechanical filtration and support during grouting to a state where the dissolved crystals leave the pipe fully permeable for drainage. This parameter change (from blocked to open) allows the system to protect against slurry intrusion while maintaining drainage productivity.
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 grouting structure effectively supports the water-stop component, increases grouting pressure, reduces cracks, and improves sealing, ensuring continuous drainage and efficient operation of the drainage system, particularly for large-scale landslide treatment without increasing construction difficulty or cost.
Implementation Method 1
the crystals dissolve to change osmotic pressure and facilitate groundwater flow
Data Source
Figure 1~2
AI summary
The present invention provides a grouting structure filled with soluble crystals and a construction method thereof, wherein the structure comprises a water-permeable section and a grouting section; a water-stop component is arranged between the water-permeable section and the grouting section; a permeable pipe is arranged in the water-permeable section; the permeable pipe is filled with solid soluble crystals; the water inlet of the drain pipe is arranged in the water-permeable section; the elevation of the water inlet of the drain pipe is higher than that of the water outlet of the drain pipe. The present structure is beneficial to increase the pressure of grouting, reduce cracks in the grouting section, and improve the sealing effect, thus enhancing the negative pressure effect of the water-permeable section, effectively supporting the water-stop component during grouting, preventing the slurry from entering the water-permeable section and the consequent interference in the formation of a negative pressure environment, avoiding blockage of the permeable pipe, and preventing large displacement of the water-stop component by squeezing. It is conducive to ensuring continuous drainage of the deep portion of the slope, and is of great significance in solving the problem of drainage treatment of large-scale landslide.