Multilayer Precast Paved Road With Zigzag Joint Coupling

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Solution Overview

Problem

Existing paved roads face issues with degradation over time, requiring extensive reconstruction, which is hindered by weather conditions and noisy, disruptive construction processes, and temporary roads using steel or FRP boxes with styrene foam lack strength and require numerous assembly and removal processes.

Innovation Solution

A multilayer precast paved road design featuring precast lower and upper pavement panels arranged in a zigzag pattern with joint members for easy engagement, allowing quick assembly and removal without causing unevenness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If bolts and nuts are used to fasten upper and lower laying members, then coupling between layers is achieved, but the number of assembly and removal processes increases significantly

Engineering Contradiction:

Improvecoupling strengthVSAvoidnumber of fastening processes

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The invention extracts the fastening function from the pavement panels themselves and relocates it to separate joint members. The joint members include engagement protrusions that fit into engagement holes in the pavement panels, thereby separating the load-bearing function from the connecting function and simplifying the overall assembly process.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The joint members act as intermediary components between upper and lower pavement panels. These joint members contain engagement protrusions that couple with engagement holes in adjacent panels, serving as a mediating mechanism that simplifies the connection process while maintaining structural integrity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Strength

If bolts and nuts are used for fastening, then coupling is achieved, but the fastening is easily loosened due to vibration

Engineering Contradiction:

Improvecoupling strengthVSAvoidfastening reliability

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Inventive Principle:

Principle #24Intermediary (Mediator)

3Strength

If pavement materials are used for road construction, then road strength is achieved, but construction cannot proceed when it rains due to insufficient curing

Engineering Contradiction:

Improveroad strengthVSAvoidconstruction continuity

Core Design Contradiction:

StrengthVSProductivity

Solution Approach 1:

The invention divides the road structure into separate precast pavement panels that can be manufactured independently of weather conditions. These panels are assembled on-site using joint members with engagement protrusions and holes, eliminating the need for on-site curing and allowing continuous construction regardless of rain.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pavement panels are precast in advance under controlled factory conditions, allowing the road structure to be assembled from pre-manufactured components. This preliminary action eliminates weather-dependent curing steps and enables continuous on-site assembly.

Inventive Principle:

Principle #10Preliminary action

4Productivity

If pavement materials are prepared in advance, then construction efficiency is improved, but the materials can only be used within limited time after preparation

Engineering Contradiction:

Improveconstruction efficiencyVSAvoidmaterial usage time window

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inventive Principle:

Principle #10Preliminary action

5Ease of repair

If degraded pavement materials are removed for repair, then road maintenance is achieved, but big noise occurs and construction time slots are limited

Engineering Contradiction:

Improveroad maintenanceVSAvoidconstruction noise

Core Design Contradiction:

Ease of repairVSObject-generated harmful factors

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The modular panel design allows individual degraded panels to be quickly removed and replaced with new ones. The joint members with engagement protrusions and holes enable rapid disassembly and reassembly, minimizing noise exposure time and allowing repairs to be completed more quickly than traditional methods.

Inventive Principle:

Principle #34Discarding and recovering

Data Source

PatentUS12392093B2Multilayer precast paved road

Publication Date: 2025.08.19 OBAYASHI ROAD CORPORATION

AI summary

Provided is a multilayer precast paved road that enables simple coupling between upper pavement panels and lower pavement panels using joint members and enables easy and quick assembly and removal without requiring a large number of processes. A multilayer precast paved road including a plurality of precast lower pavement panels laid on a road panel and a plurality of precast upper pavement panels laid on upper surfaces of the lower pavement panels is configured such that the lower pavement panels 3 and the upper pavement panels are arranged in a zigzag manner, and joint members are provided to lie between upper and lower joining surfaces of the lower pavement panels and the upper pavement panels, and the lower pavement panels and the upper pavement panels are coupled to each other through engagement or fitting between the lower pavement panels and the upper pavement panels achieved by the joint members.