Modular Precast Retaining Wall with In-Situ Concrete Cavity
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Solution Overview
Problem
Existing methods for constructing retaining walls are either labor-intensive and costly due to on-site concrete pouring or require specialized techniques and equipment for ground anchors when using prefabricated components.
Innovation Solution
A modular precast retaining wall system featuring reinforced concrete wall elements with central cavities that can be filled with in-situ concrete, connected via angled protruding reinforcement elements, allowing for easy assembly and horizontal force transfer without the need for special skilled workers or extensive formwork.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If on-site concrete pouring is used to construct retaining walls, then structural strength and stability are improved, but construction time, labor intensity, and cost increase significantly
Solution Approach 1:
The retaining wall is divided into modular precast concrete panels that can be manufactured separately and then assembled on-site. Each panel is a self-contained structural unit with integrated reinforcement, allowing parallel production and rapid assembly, thus reducing construction time while maintaining structural integrity through standardized connection details.
Solution Approach 2:
Concrete panels are precast in controlled factory conditions before delivery to the construction site. This preliminary action allows for optimized reinforcement placement, quality control, and simultaneous production of multiple panels, significantly reducing on-site construction time and labor while ensuring consistent structural strength.
2Stability of the object's composition
If ground anchors are used with prefabricated retaining wall components, then structural stability is improved, but construction complexity and cost increase due to specialized techniques and equipment
Solution Approach 1:
The retaining wall panels are designed with integrated base elements and connection features that combine the functions of wall panels, foundations, and inter-panel connections into single modular units. This merging eliminates the need for separate ground anchors and complex anchoring systems, reducing construction complexity while maintaining stability through the integrated design.
Solution Approach 2:
The precast panels are designed to be self-supporting and self-connecting through standardized interlocking details and grout joints. The panels themselves provide the necessary structural stability without requiring additional ground anchors or specialized anchoring equipment, allowing conventional construction workers to assemble the wall using standard procedures.
3Manufacturing precision
If extensive formwork and reinforcement work is performed on-site, then concrete retaining wall quality is improved, but construction cost and labor requirements increase
Solution Approach 1:
All formwork, reinforcement placement, and concrete casting are performed in controlled factory conditions during panel precasting. This preliminary action ensures consistent quality and manufacturing precision through standardized processes and quality control, while eliminating the need for expensive on-site formwork and reinforcement labor.
Solution Approach 2:
The retaining wall is segmented into precast panels that are manufactured separately in controlled environments. This segmentation allows for optimized factory production processes, standardized reinforcement details, and quality control measures that reduce overall construction costs while maintaining or improving concrete quality compared to traditional on-site casting.
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
Enables quick, cost-effective, and easy construction of retaining walls at the installation site, eliminating the need for special techniques and reducing costs by using prefabricated components that can be easily connected and backfilled, while providing a stable and load-bearing structure.
Implementation Method 1
can be filled with in-situ concrete and can be connected to a connection reinforcement of the wall element for the transfer of horizontal forces
Implementation Method 2
the wall element on the two vertical edges from the flat side has angled protruding connection reinforcement elements
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The retaining wall comprises vertically arranged armored tabular wall element (2) made of concrete for earth support perpendicular to wall element. A wall retaining element (3) has central cavity (13) that is filled with in situ concrete (16), which is connected to the wall element for ablation of horizontal forces. The wall elements with its wall retaining elements are connected to each other in the longitudinal direction. An independent claim is included for process for producing concrete retaining wall.