Rail Fastening Base Plate With Top-Removable Anchors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rail fastening systems face issues with anchors detaching from the base plate due to buoyant forces during concrete pouring, leading to costly and time-consuming repairs, and anchors are difficult to replace once embedded in concrete.
Innovation Solution
A rail fastening system with a base plate featuring through-holes for anchors that allow insertion from above, secured by a retaining contour, enabling easy removal and replacement without damaging the concrete bed, using threaded connections to prevent loosening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anchors are inserted into the base plate from below and locked in place, then the anchors are held in place by the concrete during pouring, but the anchors may detach from the base plate due to buoyant forces, allowing concrete to flow between the base plate and anchor
Solution Approach 1:
The patent inverts the traditional anchor insertion direction by inserting anchors from above the base plate through through-holes instead of from below. This inversion allows the anchors to be securely held by gravity and a retaining contour on the base plate, preventing detachment during concrete pouring while maintaining ease of installation and replacement.
Solution Approach 2:
The base plate is segmented with through-holes that completely penetrate the plate, allowing anchors to pass through and be secured on one side while remaining accessible from the other. This segmentation enables both secure retention during pouring and easy maintenance by allowing anchor removal from the top without breaking out the concrete bed.
2Reliability
If anchors are embedded deep in concrete, then they are securely held during pouring, but disassembly requires breaking out the concrete structure causing severe damage
Solution Approach 1:
The patent inverts the traditional anchor installation approach by inserting anchors from above through through-holes rather than from below. This allows anchors to be embedded deep in concrete for secure holding while enabling easy removal from the top without requiring concrete breakout, thus resolving the contradiction between embedding security and repair ease.
Solution Approach 2:
The base plate is designed with through-holes and retaining contours in advance, allowing anchors to be pre-installed and securely held during concrete pouring. This preliminary design enables future anchor replacement without concrete damage, as the through-holes provide direct access for anchor removal after the concrete has hardened.
3Ease of repair
If through-holes are used for anchor insertion from above, then anchors can be easily removed and replaced without damaging concrete, but the retaining contour must securely hold anchors against buoyant forces during pouring
Solution Approach 1:
The patent inverts the anchor insertion direction to from-above through through-holes, which enables easy anchor removal and replacement for maintenance. The retaining contour on the base plate is designed to securely hold the anchors against buoyant forces during pouring, thus resolving the contradiction between ease of repair and retaining strength.
4Reliability
If anchors are inserted from below and locked, then they are held during pouring, but correction of detachment after concrete hardening is time-consuming and costly
Solution Approach 1:
The patent inverts the anchor insertion direction to from-above through through-holes, allowing anchors to be easily removed and replaced from the top after concrete hardening. This eliminates the need for time-consuming and costly concrete breakout and repair operations, thus resolving the contradiction between reliable positioning and correction time.
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
Enhances reliability and maintainability by allowing anchors to be unscrewed from the top, preventing detachment and structural damage, thus improving durability and reducing maintenance costs.
Implementation Method 1
the concrete generates a buoyant force that acts on the base plate from below, pushing it upwards. Simultaneously, the anchors are held in place by the concrete because their length means they are embedded deep within it.
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a rail fastening system (1) for fastening a rail (2) on a rail underlying surface, preferably for a solid roadway, which rail fastening system has a base plate (10), preferably made of plastic, and at least one dowel (20), wherein the base plate (10) has at least one opening (15), which penetrates the base plate (10) completely in the thickness direction, and wherein the dowel (20) is introduced into the opening (15), is retained therein by means of a retaining contour and, in the thickness direction, projects above the base plate (10), at least on one side.