Positioned Grouting Anchor Rod for Seepage Control
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Solution Overview
Problem
Traditional anchor rods are ineffective in projects with complex groundwater seepage environments, leading to inaccurate design, reduced gripping force, and instability due to seepage damage, which complicates the reinforcement process and increases the risk of deformation and collapse in geotechnical engineering.
Innovation Solution
An anchor rod system with anti-filter water guide holes and one-way grouting holes, integrated with a grouting guide pipe and a one-way grouting pipe, featuring a spring device and anti-filter layer, allows for controlled drainage and grouting, preventing seepage damage while maintaining structural support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pressure grouting of hollow anchor body is used to reinforce broken rock mass, then support and protection for slopes with medium geological conditions is achieved, but the anchor reinforcement fails in complicated groundwater seepage environments due to reduced gripping force between grouts and surrounding soil
Solution Approach 1:
The anchor rod system is segmented into multiple functional components: the anchor rod body for mechanical anchoring, the grouting guide pipe for controlled grout injection, and the anti-filter water guide pipe for drainage. This segmentation allows each component to perform its specific function independently, preventing groundwater from compromising the grouting process while maintaining reliable anchor reinforcement in seepage environments
Solution Approach 2:
The grouting guide pipe acts as an intermediary device between the grout source and the surrounding rock mass. It controls the grouting process by directing grout flow through designated pathways, preventing groundwater from interfering with grout placement. This intermediary structure ensures that grouting and drainage occur simultaneously but independently, resolving the contradiction between achieving reliable reinforcement and preventing seepage damage
2Strength
If traditional anchor rod system is used in complicated groundwater conditions, then structural support is provided, but groundwater seepage reduces the gripping force between grouts and surrounding soil, affecting overall stability
Solution Approach 1:
The harmful effect of groundwater on grout bonding is eliminated by extracting the drainage function into a separate component - the anti-filter water guide pipe. This pipe removes groundwater from the grouting zone before the grout can set, ensuring that the grout maintains full bonding strength with the surrounding soil without being compromised by water infiltration
Solution Approach 2:
The system performs preliminary drainage through the anti-filter water guide pipe before grouting occurs. By removing groundwater in advance and during the grouting process, the system ensures that when grout is injected, the surrounding soil is in a favorable state for bonding, maximizing the gripping force between grout and soil
3Ease of manufacture
If traditional anchor rod design is used, then simple construction is achieved, but inaccurate force calculation due to groundwater conditions results in inaccurate design of the anchor rod system
Solution Approach 1:
The anchor rod system is designed as a universal solution that handles both anchoring and drainage functions through integrated multi-functional components. The grouting guide pipe and anti-filter water guide pipe work together to provide controlled grouting and simultaneous drainage, eliminating the need for separate drainage structures. This multi-functionality achieves accurate design in seepage conditions without significantly complicating the construction process
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 integrated system effectively prevents and treats seepage damage by allowing independent drainage and grouting, enhancing the accuracy and efficiency of seepage control, reducing construction costs and time, and ensuring the stability of geotechnical structures.
Implementation Method 1
The grouting pipe and the anti-filter water guide pipe are mechanically connected with the grouting guide pipe body through a spring device
Implementation Method 2
the electromagnet grouting end head is magnetic after being electrified, so as to control the position of the iron limiting end to realize the grouting positioning for engineering seepage damage
Implementation Method 3
a nozzle is provided with an anti-filter layer
Implementation Method 4
The bottom of the one-way grouting pipe is provided with a one-way valve; and the one-way grouting pipe can pass through the one-way grouting holes of the anchor rod body under the action of the spring device, and is pressed into a rock and soil layer
Data Source
AI summary
Disclosed is a positioning grouting anchor rod suitable for preventing and controlling an engineering seepage damage and a construction method thereof. The positioning anchor rod comprises an anchor rod, a grouting guide pipe and a grouting pipe. When the seepage failure occurs in the project, a water pump can be connected with a drain pipe interface to realize water drainage, and at the same time, a positioner can be used for positioning grouting in the seepage failure area to improve the accuracy of grouting reinforcement. A drainage channel and a grouting channel involved in the present application are independent of each other and do not interfere with each other, and the drainage and grouting functions are combined on the basis of retaining the original supporting function of the anchor rod.