Precast Modular Retaining Wall Block With Integrated Geogrid

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Solution Overview

Problem

Modular earth retaining walls face challenges in resisting high lateral soil pressures, temperature effects, and seismic loads due to the limitations of existing materials and construction methods, which affect their stability and durability.

Innovation Solution

The development of precast modular block systems with integrated mechanical geogrid connections, soil nail systems, and reinforced web portions that extend into the soil, along with drainage materials and locking mechanisms, to enhance stability and resistance to shear forces and loads.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If traditional modular block systems are used for earth retaining walls, then construction simplicity and ease of assembly are maintained, but resistance to high lateral soil pressures and seismic loads is insufficient

Engineering Contradiction:

Improveresistance to lateral soil pressures and seismic loadsVSAvoidcomplexity of block system structure

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The patent applies composite materials by integrating multiple functional elements into a single precast modular block: geogrid connections embedded in the block structure, drainage channels incorporated into the block design, and reinforcement elements integrated within the concrete matrix. This composite approach enhances the block's load-bearing capacity and resistance to lateral pressures while maintaining the modular construction advantage

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent utilizes segmentation by dividing the retaining wall into standardized precast modular blocks that can be assembled in segments. Each block is designed as an independent unit with integrated features (geogrid connections, drainage channels, reinforcement), allowing the wall to be constructed in modular sections while achieving overall structural integrity through the interlocking design of individual blocks

Inventive Principle:

Principle #1Segmentation

2Reliability

If existing precast block systems are used, then construction speed and productivity are maintained, but durability under temperature changes and environmental exposure is insufficient

Engineering Contradiction:

Improvedurability under temperature changes and environmental exposureVSAvoidease of manufacturing precast blocks

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies preliminary action by pre-integrating drainage channels, geogrid connections, and reinforcement elements into the precast blocks during manufacturing. This preliminary incorporation of protective and functional features ensures durability against environmental exposure and temperature changes from the outset, while the precast nature maintains construction speed by eliminating on-site assembly of these complex features

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses composite materials by combining concrete with integrated drainage channels, geogrid reinforcements, and other functional elements within a single precast unit. This composite construction enhances durability and environmental resistance while the precast manufacturing process maintains ease of production through standardized fabrication procedures

Inventive Principle:

Principle #40Composite materials

3Stability of the object's composition

If modular blocks are stacked without integrated connections, then ease of assembly and construction simplicity are maintained, but stability and resistance to shear forces are insufficient

Engineering Contradiction:

Improvestability of stacked modular blocksVSAvoidcomplexity of connection mechanisms

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent applies merging by combining multiple functions into the single precast block unit: structural load-bearing capacity, geogrid connection integration, drainage functionality, and reinforcement elements are all merged into one manufactured component. This eliminates the need for separate connection mechanisms between blocks, as the integrations are built-in, thereby maintaining construction simplicity while achieving enhanced stability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent uses composite materials to create a unified block structure that integrates reinforcement elements, geogrid connections, and drainage channels within the concrete matrix. This composite design provides inherent stability and shear resistance without requiring additional external connection mechanisms, maintaining ease of assembly while improving structural performance

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS8684635B2Precast wall system

Publication Date: 2014.04.01 EARTH WALL PRODUCTS LLC

AI summary

Disclosed herein are various embodiments of systems related to modular earth retaining wall systems. In one embodiment, among others, a precast retaining wall block configured for assembly into a retaining wall includes a front face portion, a web portion extending outwardly from a rear surface of the front face portion, a rear panel portion, and a geogrid material wrapped around the rear panel portion and extending outwardly from the rear panel portion. The web portion includes a vertical center portion and protrusions extending outwardly from the lower sides of the vertical center portion. The protrusions may be triangular.