Wall Sinking Control via Elastic Roller Supports
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Solution Overview
Problem
Existing methods for underground wall sinking lack control over the sinking process, making it difficult to achieve precise positioning and manage the impact on surrounding rock-soil masses.
Innovation Solution
The method involves creating an operation space with retaining structures and elastic supports to control the sinking of the wall, using jacks and rollers to manage the excavation and ensure controllable elevation and plane coordinates, allowing for orderly trench excavation and adaptable sinking under water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional wall sinking methods are used, then the wall can be sunk to underground, but the sinking process cannot be controlled precisely and the impact on surrounding rock-soil mass is unmanageable
Solution Approach 1:
The construction system is segmented into multiple functional components: retaining structures divided into segments, elastic supports distributed at intervals, jacks for controlled lifting, and rollers for friction reduction. This segmentation allows precise control of wall sinking by managing each component independently while maintaining overall system coordination.
Solution Approach 2:
Retaining structures are constructed on both sides of the trench before wall sinking begins. These retaining structures are prepared in advance to provide a controlled environment, and elastic supports are pre-installed between the retaining structures and the wall to enable controlled sinking from the outset.
2Measurement precision
If elastic supports with rollers are used between retaining structures and wall, then wall sinking can be controlled precisely, but the construction system becomes more complex
Solution Approach 1:
Elastic supports with rollers serve as intermediary elements between the retaining structures and the wall. The rollers reduce friction to enable smooth wall movement, while the elastic components provide controlled resistance and force transmission. This intermediary mechanism achieves precise control without requiring direct rigid connection.
Solution Approach 2:
The support system transitions from static to dynamic control during wall sinking. The elastic supports can adjust their stiffness and the rollers can move freely, allowing the system to adapt to changing conditions during the sinking process and maintain precision throughout the dynamic operation.
3Reliability
If trench is excavated in an orderly manner with retaining structures, then wall sinking control is improved, but the construction time and process complexity increase
Solution Approach 1:
Retaining structures are constructed in advance before trench excavation and wall sinking. This preliminary action creates a safe and controlled environment for subsequent operations, preventing soil collapse and enabling orderly excavation. The retaining structures are prepared segment by segment to maintain stability throughout the construction process.
4Manufacturing precision
If jacks are used to control wall elevation during sinking, then positioning precision is improved, but the device complexity and operational difficulty increase
Solution Approach 1:
The jacks are strategically positioned to utilize the wall's own weight and the reaction forces from the retaining structures to achieve elevation control. The system is designed so that the wall sinking process itself provides the necessary counterforces for the jacks to operate effectively, reducing the need for external power sources and complex control mechanisms.
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 approach enables controlled and manageable wall sinking, ensuring safety and quality in the construction of underground structures by preventing soil collapse and maintaining structural integrity, while being adaptable to various geological conditions.
Implementation Method 1
elastic supports (with rollers) sandwiched between the retaining structures and the wall
Implementation Method 2
jacks at the bottom of the wall are employed to control the wall sinking
Data Source
AI summary
A wall sinking construction method comprises retaining structures are first formed on two sides, corresponding to a groove body, of the wall body; then a section of wall body of a certain height is produced on the ground, and jacks and a supporting pile body are installed on the two sides of the bottom of the wall body that is supported by the jacks and the supporting pile body, the bottom of the wall body is suspended to form an excavation working space with a certain height; an underwater excavator is controlled remotely to excavate rock and soil in the groove body layer by layer; an elastic support having rollers is sandwiched between the retaining structures on the two sides of the wall body and the groove body to transfer and balance rock and soil pressure.