Anchor Pin for Textile Grid Reinforcement in Shotcrete
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Solution Overview
Problem
Existing methods for repairing and reinforcing concrete structures using textile grid reinforcement and shotcrete face challenges such as low constructability, difficulty in achieving precise shotcrete thickness, and poor construction quality on curved surfaces due to limitations in anchor installation and shotcrete placement.
Innovation Solution
An anchor pin with a driving part, middle body part, upper body part, driving depth limiting lateral node, and grid fixing part is used to securely place and fix a textile grid reinforcement, allowing for precise placement of primary and secondary shotcrete layers by visually checking the thicknesses, thereby improving constructability and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional wire mesh is used for repairing and reinforcing concrete structures, then the load carrying capacity can be increased, but the tensile force of the wire mesh is difficult to secure and the repair and reinforcement effects are reduced
Solution Approach 1:
The invention uses a composite structure consisting of wire mesh embedded in shotcrete, where the shotcrete matrix protects and transfers loads to the wire mesh reinforcement. This composite system secures the tensile force of the wire mesh through the bonding interface between the shotcrete and mesh, resolving the issue of difficult tensile force securing while maintaining load carrying capacity enhancement
2Ease of manufacture
If lattice-shaped plastic grid is used for reinforcement, then the tensile strength is low and manufacturing is difficult, but the constructability is improved
Solution Approach 1:
The invention changes the material parameters by using metal wire mesh instead of plastic grid, achieving higher tensile strength while maintaining constructability. The wire mesh can be easily attached to concrete structures using conventional methods, and its mechanical properties provide superior tensile strength compared to plastic alternatives
3Strength
If textile grid reinforcement is used, then the tensile strength and low tensile strain are improved, but the precision of shotcrete placement and construction quality on curved surfaces deteriorates
Solution Approach 1:
The invention divides the reinforcement system into modular components - the wire mesh is assembled in lattice form with standardized dimensions, allowing precise placement on curved surfaces. The modular nature enables adaptation to complex geometries while maintaining shotcrete placement precision through systematic attachment patterns
4Strength
If shotcrete is placed on textile grid reinforcement, then the repair and reinforcement effects are improved, but the construction speed and precision of shotcrete thickness control are reduced
Solution Approach 1:
The invention performs preliminary attachment of the wire mesh to the concrete structure before shotcrete placement. This preliminary action establishes a secure reinforcement system that simplifies subsequent shotcrete application, allowing faster construction while maintaining precise thickness control through the pre-positioned mesh framework
Data Source
AI summary
Provided are an anchor pin for placing shotcrete and fixing a textile grid and a method of constructing textile grid reinforced shotcrete using the same, wherein the anchor pin allows a textile grid reinforcement to be precisely disposed at a required position and, when shotcrete is placed, prevents a textile grid reinforcement from moving due to a driving pressure for precise construction so as to increase durability and safety of the concrete structure, allows primary and secondary shotcrete to be constructed while placing thicknesses thereof are visually checked so as to increase precision of construction, and allows the textile grid reinforcement to be disposed and fixed to accurately correspond to a shape of the concrete structure even when a lower portion of a slab, a wall, and a structure with a curved surface, such as a lining of a tunnel, are built.