Adjustable Mold for Pre-cast Retaining Wall Production

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Solution Overview

Problem

Traditional poured-in-place concrete retaining walls face challenges such as labor-intensive construction, time-consuming curing, and aesthetic unsightliness, while masonry retaining walls lack structural strength and are labor-intensive to build, often leading to erosion or landslides before completion.

Innovation Solution

An adjustable mold for manufacturing pre-cast cantilevered concrete retaining walls, which includes a base, footing form, and rails to shape and cure concrete reinforcement, allowing for speedy and aesthetically pleasing wall production with tongue and groove connections for interlocking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If poured-in-place concrete retaining walls are constructed, then structural strength is achieved, but construction time and labor are excessive

Engineering Contradiction:
Improvestructural strengthVSAvoidconstruction speed
Core Design Contradiction:
StrengthVSProductivity

Solution Approach 1:

The patent applies preliminary action by pre-casting concrete retaining wall panels in a controlled environment before transporting them to the construction site. The panels are pre-assembled with reinforcement, forms, and backfill material in advance, allowing the actual installation to be completed quickly by simply placing the pre-fabricated units into position. This resolves the contradiction by performing construction activities beforehand, reducing on-site construction time while maintaining structural integrity.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent segments the retaining wall construction into separate pre-fabricated panels that can be manufactured independently and then assembled on-site. Each panel is constructed as a discrete unit with standardized components, allowing parallel production of multiple panels and rapid assembly during installation. This segmentation enables faster construction speed without compromising the overall structural strength of the completed wall system.

Inventive Principle:
Principle #1Segmentation

2Shape

If masonry units are used to fabricate retaining walls, then aesthetic appearance is improved, but structural strength and construction speed deteriorate

Engineering Contradiction:
Improveaesthetic appearanceVSAvoidstructural strength
Core Design Contradiction:
ShapeVSStrength

Solution Approach 1:

The patent uses composite materials by combining concrete with steel reinforcement bars (rebar) within the pre-cast panels. The concrete provides compressive strength and mass, while the steel reinforcement adds tensile strength, creating a composite structure that achieves both structural integrity and aesthetic appeal. The panels can be molded with attractive surfaces mimicking masonry while maintaining the superior strength properties of reinforced concrete.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent applies copying by creating pre-cast concrete panels with surfaces that replicate the appearance of traditional masonry units. The forms used during casting incorporate textures, patterns, or shapes that mimic stone, brick, or other aesthetic materials, allowing the retaining wall to achieve the desired visual appeal without using actual masonry units, thereby maintaining structural strength and construction speed.

Inventive Principle:
Principle #26Copying

3Shape

If masonry units are stacked to form retaining walls, then aesthetic appearance is achieved, but construction time and labor increase

Engineering Contradiction:
Improveaesthetic appearanceVSAvoidconstruction time
Core Design Contradiction:
ShapeVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-assembling complete retaining wall panels with all aesthetic elements integrated during the casting process. Rather than stacking individual masonry units on-site, the entire panel including surface textures, patterns, and decorative features is prepared in advance at the manufacturing facility, reducing on-site construction time to simple panel placement and connection.

Inventive Principle:
Principle #10Preliminary action

4Productivity

If pre-cast concrete structures are used, then construction speed is improved, but adaptability to different configurations deteriorates

Engineering Contradiction:
Improveconstruction speedVSAvoidconfiguration flexibility
Core Design Contradiction:
ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent applies dynamics by designing pre-cast panels with adjustable and reconfigurable features. The panels incorporate standardized connection mechanisms, adjustable reinforcement configurations, and modular dimensions that allow them to be adapted to different wall heights, lengths, and structural requirements. This dynamic design enables the same basic panel type to serve multiple configuration needs while maintaining the construction speed benefits of pre-casting.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent applies universality by creating standardized pre-cast panel designs that can serve multiple functions and configurations. The panels are designed with universal connection interfaces, standardized reinforcement patterns, and flexible dimensions that allow them to be used in various wall types and applications. This multi-functionality enables rapid deployment across different project requirements without sacrificing adaptability.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS8025493B2Apparatus for manufacturing a pre-cast retaining wall
Publication Date: 2011.09.27 CXT INC
  • US8025493B2 patent drawing
  • US8025493B2 patent drawing
  • US8025493B2 patent drawing

AI summary

An adjustable mold for manufacturing a pre-cast cantilevered concrete retaining wall. The adjustable mold includes a base, at least one upright form disposed substantially perpendicular and adjacent to the base, and a plurality of rails interchangeable and repositionable adapted to be secured to the base to vary the size and surface features of the retaining wall. The base, the upright form, and the plurality of rails cooperate to define a plurality cavities in fluid communication that shape and allow sufficient curing of a combination of fluid concrete and concrete reinforcement to form a retaining wall of a selected configuration. A top surface of the base is contoured to define the mold negative of a textured shape desirable for the external surface of the pre-cast cantilevered concrete retaining wall.