Plastic Drilling Template Formwork for Lightweight Pile Wall Assembly

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Solution Overview

Problem

Existing drilling template formwork materials, such as polystyrene, metal, and wood, are prone to rapid wear, require high maintenance, are heavy, inflexible, and pose safety hazards during installation and removal, leading to increased costs and labor demands.

Innovation Solution

Development of lightweight, reusable, and flexible formwork elements made of plastic with self-releasing surfaces and tensioning mechanisms, allowing for easy assembly and disassembly, and featuring rubber lips to prevent concrete ingress.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If polystyrene formwork is used, then ease of manufacture and flexibility are improved, but durability and service life deteriorate due to rapid wear

Engineering Contradiction:
Improveease of manufactureVSAvoiddurability
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The formwork element combines a plastic base material with reinforcement elements (metal or wooden strips) to create a composite structure that achieves both the manufacturing flexibility of plastic and the durability of reinforced materials. The plastic provides ease of manufacture and flexibility while the reinforcement elements prevent rapid wear and extend service life.

Inventive Principle:
Principle #40Composite materials

2Reliability

If metal or wooden formwork is used, then strength and durability are improved, but weight and handling difficulty worsen

Engineering Contradiction:
ImprovestrengthVSAvoidweight
Core Design Contradiction:
ReliabilityVSWeight of moving object

Solution Approach 1:

The formwork uses plastic as the primary material to reduce weight compared to traditional metal or wood, while incorporating reinforcement elements only where structurally necessary. This composite approach maintains adequate strength for concrete formwork applications while significantly reducing the overall weight and improving handling characteristics.

Inventive Principle:
Principle #40Composite materials

3Reliability

If metal or wooden formwork panels are used, then strength is improved, but flexibility and adaptability deteriorate

Engineering Contradiction:
ImprovestrengthVSAvoidflexibility
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The formwork elements are designed with localized reinforcement rather than uniform construction. The plastic base material provides overall flexibility and adaptability, while reinforcement elements are strategically positioned only at specific locations where additional strength is required, allowing the formwork to be easily adapted to different concrete configurations.

Inventive Principle:
Principle #3Local quality

4Productivity

If conventional formwork removal methods are used, then productivity is maintained, but safety hazards and labor requirements increase

Engineering Contradiction:
ImproveproductivityVSAvoidsafety hazards
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

The formwork is divided into modular segments with integrated release mechanisms that allow for safe and efficient removal. The segmented design enables controlled dismantling without requiring heavy machinery or complex removal procedures, reducing safety hazards while maintaining productivity through easier handling and faster assembly/disassembly.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentEP4650524A1Formwork body and method for producing a drilling template for a drilling pile wall
Publication Date: 2025.11.19 TBS TIEFBAU-SERVICE GMBH
  • EP4650524A1 patent drawingFigure 1
  • EP4650524A1 patent drawingFigure 2
  • EP4650524A1 patent drawingFigure 3

AI summary

Formwork body for the production of a drilling template for a bored pile wall, wherein the formwork body is circular or semi-circular and is made of wood, metal or polystyrene and the formwork body for the drilling template has a base plate with a fastening rod.