Precast Wall Rail Members Resist Concrete Pouring Pressure
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Solution Overview
Problem
Existing methods for constructing underground structures using precast concrete panels face challenges such as delayed construction periods, mold fractures during concrete pouring, and deformation of panels due to lateral pressure, leading to potential accidents and reliability issues.
Innovation Solution
A precast wall structure featuring outer and inner panels connected by truss members, rail members, link members, and coupling members, including C-shaped bolts, which are buried in the panels to resist pouring pressure and minimize lateral deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If precast panels are connected using through-holes and form ties, then panels can be assembled, but the form ties may be fractured during pouring of concrete
Solution Approach 1:
The invention extracts the vulnerable form ties from the system and replaces them with embedded rail members that are integral to the precast panels. The rail members are directly embedded in the panels during manufacturing, eliminating the need for separate form ties that could fracture during concrete pouring.
Solution Approach 2:
The rail members are installed in advance during panel manufacturing, before the panels are assembled at the construction site. This preliminary action ensures that the connection elements are already in place and properly positioned, eliminating the need for on-site installation of vulnerable components.
2Ease of manufacture
If through-holes are formed in inner panels for form ties, then panels can be connected, but the through-holes may be subjected to water leakage
Solution Approach 1:
The invention eliminates through-holes by using rail members that are embedded within the panel thickness. The rail members extend through the panel without creating open holes, thus preventing water leakage while maintaining connection functionality.
Solution Approach 2:
The rail members act as intermediaries that provide connection functionality without creating vulnerable through-holes. They are embedded in the panels and extend outward to engage with connection members, serving as a mediator between the need for connection and the need to prevent water leakage.
3Productivity
If an integrated panel structure is manufactured by connecting multiple panels using connection members, then panels can be erected before pouring, but the shape of connection members and panels may be deformed due to lateral pressure
Solution Approach 1:
The rail members are pre-installed during panel manufacturing, allowing panels to be assembled and erected before concrete pouring. This preliminary installation enables the integrated structure to be formed in advance, improving construction efficiency while the rail members are positioned to resist lateral pressure.
Solution Approach 2:
The connection system combines rail members embedded in concrete panels with external connection members, creating a composite structure that resists lateral pressure more effectively than either component alone. The embedded rail members provide stable anchorage while external members provide structural support.
4Ease of manufacture
If a plurality of panels is separately manufactured and erected, then factory production is simplified, but the panels are spread outwards by pouring pressure of concrete
Solution Approach 1:
The rail members are installed in advance during panel manufacturing, enabling panels to be assembled at the construction site before concrete pouring. This preliminary assembly allows panels to be positioned and secured, preventing them from being spread outwards by pouring pressure.
Solution Approach 2:
The invention merges the separate functions of panel manufacturing and connection installation by embedding rail members during panel fabrication. This combination allows panels to be produced separately in factories while maintaining the integrity of their connection systems, enabling stable assembly on-site.
Data Source
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AI summary
The present disclosure relates generally to a precast wall having increased pouring resistance. The precast wall has a configuration by which resistance to the pouring pressure of concrete poured between outer and inner panels is increased, the configuration including rail members buried in outer and inner panels, link members disposed between connection members connecting the rail members in the outer and inner panels to act integrally, and coupling members. According to one aspect of the present disclosure, provided is a precast wall having an integrated wall structure constructed by pouring concrete between precast panels. The precast wall includes: an outer panel (10) and an inner panel (20) spaced apart at a distance and facing each other; a plurality of truss connection members (30) connecting the outer panel 10 and the inner panel (20); and rail members (11, 21) buried in the outer panel (10) and the inner panel (20), respectively, and connected to the truss connection members (30). The connection members (30) includes a horizontal members (31) horizontally connecting the rail members (11 and 21) and inclined members (33) connecting the rail members (11, 21) and .inclined between the horizontal members (31). The precast wall includes coupling members (40) respectively coupled one surface of a corresponding rail member, of the rail members 11 and 21 connected to the truss connection members 30, in a longitudinal direction.