Underground Gas Storage Sealing Structure Ductility
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Solution Overview
Problem
Existing sealing structures for underground high-pressure gas storage lack sufficient ductility, especially under high-pressure conditions, which can lead to inadequate performance and potential damage.
Innovation Solution
A sealing structure comprising an annular lining structure surrounded by concrete segments, closed steel sheets arranged between the segments to connect and seal gaps, and a rubber sealing layer that coordinates deformation with the concrete segments, enhancing ductility and pressure handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a concrete lining layer is used for sealing, then structural strength is improved, but ductility deteriorates under high-pressure conditions
Solution Approach 1:
The concrete lining layer is divided into multiple concrete segments that can move independently relative to each other. These segments are connected through flexible connecting assemblies that allow relative displacement, enabling the lining to adapt to pressure-induced deformation while maintaining overall structural integrity.
Solution Approach 2:
The connecting assembly between concrete segments is designed to be movable rather than rigidly fixed. This dynamic connection allows the segments to move and adjust their positions in response to high-pressure conditions, providing the necessary ductility while the concrete material itself maintains its strength characteristics.
2Stability of the object's composition
If the sealing structure is made rigid to maintain structural integrity, then strength is improved, but the ability to deform under pressure deteriorates
Solution Approach 1:
The sealing structure is segmented into multiple concrete blocks with flexible connections between them. This segmentation allows individual segments to deform independently while the overall structure maintains integrity through the coordinated movement of all segments.
Solution Approach 2:
The sealing structure combines rigid concrete segments with flexible connecting assemblies (which may include rubber or other elastomeric materials). This composite approach allows the rigid concrete to provide structural integrity while the flexible connectors enable the necessary deformation capability.
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
The proposed sealing structure exhibits improved ductility, allowing for greater deformation and enhanced gas storage pressure, thus better adapting to geological conditions of soft rock layers and preventing structural damage from excessive pressure.
Implementation Method 1
a sealing layer, where the sealing layer is arranged close to the inner side of the annular lining structure and forms a coating with the annular lining structure on the closed steel sheets
Data Source
AI summary
A sealing structure of an underground high-pressure gas storage and a construction method thereof are provided. The sealing structure includes an annular lining structure, wherein the annular lining structure is surrounded by a plurality of concrete segments; closed steel sheets; the closed steel sheets are arranged at an inner side of the annular lining structure and used for connecting two adjacent concrete segments and plugging a gap between two adjacent concrete segments; and a sealing layer, wherein the sealing layer is arranged close to the inner side of the annular lining structure and forms a coating with the annular lining structure on the closed steel sheets.