Diaphragm Wall Device With Movable Bracing for Early Contact Pressure
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Solution Overview
Problem
Existing trench wall devices face challenges in applying sufficient contact pressure force, especially on harder ground, due to weight limitations and require complex and expensive external systems, which are inefficient at greater depths.
Innovation Solution
The trench wall device features a fixedly connected holding device to an intermediate frame, allowing the base frame with soil removal devices to be displaced relative to the holding device, and a bracing system with actuating elements that can be extended early in the trench formation process, enabling symmetrical force application and compact structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the trench wall device uses only its own weight to apply contact pressure force on the ground, then the device structure is simple, but the contact pressure force is insufficient when working on harder ground
Solution Approach 1:
The patent introduces a dynamic bracing system with movable bracing elements that can be extended laterally into the trench wall. This dynamic structure allows the device to adapt to different ground conditions and apply additional contact pressure force beyond its own weight, resolving the contradiction between sufficient force and simple structure.
Solution Approach 2:
The bracing elements act as intermediaries between the trench wall device and the ground. These elements extend into the trench wall to provide additional support and apply contact pressure force, mediating the interaction between the device and the ground without requiring the entire device structure to be overly complex.
2Force
If external lifting tables or hydraulic cylinders are used to apply additional contact pressure force, then the contact pressure force is sufficient for harder ground, but the device requires complex solid rod assemblies and is expensive
Solution Approach 1:
The patent extracts the essential function of external support systems (applying additional contact pressure force) and integrates it directly into the trench wall device through built-in bracing elements. This eliminates the need for complex external lifting tables, hydraulic cylinders, and solid rod assemblies, reducing overall device complexity and cost while maintaining the capability to apply sufficient contact pressure force.
Solution Approach 2:
The bracing elements serve multiple functions: they provide structural support, enable lateral extension into the trench wall, and apply contact pressure force to the ground. This multi-functionality consolidates what would otherwise require separate external systems into a single integrated component, reducing device complexity.
3Stability of the object's composition
If bracing plates are arranged at considerable spacing above the cutting wheels, then the device can be braced, but the contact pressure force can only be applied at a relatively late stage
Solution Approach 1:
The bracing elements are designed to be extendable laterally into the trench wall from an intermediate frame position, allowing bracing to be established early in the trench formation process. This preliminary bracing action provides stability and enables early application of contact pressure force, eliminating the delay associated with arranging bracing plates at considerable spacing.
4Stability of the object's composition
If the base frame is fixedly connected to the holding device, then the structure is stable, but the soil removal device cannot be displaced independently
Solution Approach 1:
The patent segments the trench wall device into distinct functional components: the base frame with soil removal devices, the intermediate frame with bracing elements, and the holding device. This segmentation allows the base frame to be displaced independently relative to the holding device while maintaining overall structural stability through the intermediate frame connection, enabling precise control of the soil removal process.
Data Source
AI summary
The invention relates to a diaphragm wall device for creating a trench in the ground, comprising a base frame which extends in a longitudinal direction, at least one soil removal device which is arranged on a lower end region of the base frame, a holding device for holding the diaphragm wall device on an upper end region, a bracing device with at least two opposite bracing elements displaceable laterally, transversely to the longitudinal direction, and at least one actuating element, by way of which the tensioning elements can be extended laterally in the trench for bracing at least a part of the diaphragm wall device, an intermediate frame which is mounted displaceably along the base frame at a lower area of the base frame and on which the bracing device with the at least two bracing elements and the at least one actuating element is arranged, and a pressing-on device, by means of which a at least one soil removal device can be applied with a pressure force, wherein the pressing-on device is arranged between the intermediate frame and the base frame. According to the invention, the holding device is fixedly connected with the intermediate frame and the base frame with the soil removal device is displaceable with respect to the holding device.