Nested Bridge Sliding Assembly for Pier Junction Crossing

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Solution Overview

Problem

The slider on the bridge deck truss does not slide smoothly from the support platform onto the pier during incremental launching, causing a height difference and hindering the construction process.

Innovation Solution

A bridge sliding device with a slide rail assembly, first and second sliding components, and a locking assembly that allows the second sliding component to be unlockably locked onto the first sliding component, facilitating smoother movement across the junction between the temporary support platform and the bridge pier.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a temporary support platform is set up on both sides of the bridge pier for incremental launching, then the bridge deck truss can be constructed and launched, but the platform deforms under pressure creating a height difference with the pier that hinders smooth sliding

Engineering Contradiction:

Improveincremental launching efficiencyVSAvoidsmoothness of slider movement

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The sliding system is divided into two independent sliding components: a first sliding component that slides on the rail spanning the platform and pier, and a second sliding component that slides on the first sliding component. This segmentation allows each component to independently accommodate the height difference caused by platform deformation, ensuring smooth movement throughout the incremental launching process.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The second sliding component is nested on the first sliding component, creating a hierarchical sliding structure. The first sliding component handles the primary movement from the support platform onto the pier, while the second sliding component provides additional adjustment capability. This nested arrangement allows the bridge deck truss to smoothly cross the junction between platform and pier by distributing the sliding action across multiple nested components.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Force

If the bridge deck truss pressure is transmitted through the slider to the support platform, then the platform must bear the load, but this causes platform deformation and height difference with the pier

Engineering Contradiction:

Improveload transmission capabilityVSAvoidplatform deformation

Core Design Contradiction:

ForceVSShape

Solution Approach 1:

The first sliding component acts as an intermediary between the bridge deck truss and the support platform, while the second sliding component provides an additional intermediary layer. These sliding components distribute and transmit the load while accommodating platform deformation through their sliding mechanism, preventing direct transmission of full truss pressure to the platform and reducing deformation-induced height differences.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12522990B1Bridge sliding device and a bridge construction system

Publication Date: 2026.01.13 POLY CHANGDA ENGINEERING CO LTD

AI summary

A bridge sliding device includes a slide rail assembly, a first sliding component on the rail, and a second sliding component on the first. The second component locks at the start of the first, and the bridge deck truss's weight causes the first component's end to tilt slightly, allowing it to easily cross the junction between the temporary support platform and the bridge pier. This facilitates the smooth crossing of both the first and second components over the junction. Once the first sliding component is in place, the second component unlocks and continues sliding, increasing the travel distance of the bridge deck truss. The device ensures smoother movement of the components, enhancing construction efficiency.