KIET's Synchronous Controlled Lifting Technology: Enabling the Precise Installation of the 1800-Ton Jinghu Expressway Huaian Bridge Steel Truss Girder

The Jinghu Expressway, a major transportation artery in China, is undergoing a substantial expansion. The reconstruction of the Huaian Bridge is a critical element within this project, serving as a technical and logistical focal point. Recently, a significant operation concluded at the site: an 1800-ton steel truss girder was precisely moved into place using KIET’s **synchronous controlled lifting hydraulic system**. This achievement marks a substantial step forward in the main construction phase of the bridge and highlights the capabilities of advanced hydraulic equipment in major infrastructure development in China.

The Engineering Challenge: Moving an 1800-Ton Girder

As the first reconstructed bridge in the Jinghu Expressway expansion, the Huaian Bridge presented specific engineering challenges. The new bridge is 3 kilometers long, with its main steel truss girder measuring 100 meters in length, 21 meters in width, and weighing approximately **1800 tons**. The sheer scale and a complex truss structure necessitated a high degree of precision in its installation.

Traditional construction methods were deemed insufficient for safely and accurately moving such a large structure, especially given its specific force distribution requirements. To address this, the project team adopted the "synchronous jacking + sliding" method. The successful implementation of this method relied heavily on the performance and stability of its core operational system – **KIET's custom-designed synchronous jacking hydraulic system**.

KIET's Synchronous Hydraulic Solution

KIET's technical team provided a solution designed to manage the controlled movement of the large steel girder.

This system operates by coordinating multiple jacking cylinders that execute a cycle of "alternating lifting, horizontal advancement, and lowering." This allows for a progressive and controlled movement of the 1800-ton steel truss girder.

• Hydraulic Power: The hydraulic system provides the necessary force to move the large girder section.
• Precise Control: PLC control system manages the thrust and stroke of each individual cylinder. This coordination ensures synchronized force distribution and helps prevent uneven stresses during movement.

Mechanical Stability: Mechanical components are integrated to facilitate consistent and smooth operation throughout the long-distance jacking process.

Enhanced Safety and Remote Monitoring

Beyond the core jacking mechanics, KIET introduced a self-developed "**Remote Monitoring and Jacking Control System**" to enhance procedural control and safety.

Over the 20-day construction period, KIET's technical personnel were able to oversee and operate the equipment from a command center, utilizing **5G connectivity** for data transmission. The system displayed real-time operational data, control parameters, and load information. Additionally, the integrated video surveillance system assisted in identifying and managing any minor deviations that might occur during the jacking process, contributing to regulated safety and precision.

Conclusion and Industry Impact

From collaborative design to operational support, KIET served as a technical contributor to the Huaian Bridge project. The successful installation of the Jinghu Expressway Huaian Bridge steel truss girder facilitates subsequent work phases, contributing to the broader bridge construction effort in China.

This project reinforces KIET's technical capabilities and illustrates how specialized equipment providers contribute to large-scale national infrastructure projects within the context of "**intelligent manufacturing**" in China.