Shanghai Zhenzhong supports the construction of the Tongjiang Songhua River Highway Bridge

Efficient construction without fear of extreme cold

While many parts of the country are still welcoming autumn, the temperature at the construction site in Tongjiang City, Heilongjiang Province has reached freezing point.

Here, the Shanghai Zhenzhong EP400A series resonance free vibration hammer has been officially put into use for the construction of the A2 section of the National Highway Dan'a Tongjiang Songhua River Bridge and Approach Road Project. Zhenzhong equipment once again serves national key projects and demonstrates its hardcore strength in the cold northern regions.

Part.01 A bridge that connects more than just the two sides

The Tongjiang Songhua River Highway Bridge is a key node on the Dan'a National Highway, located between Tongjiang City and Suibin County in Heilongjiang Province. The main bridge is 5741 meters long and 16.5 meters wide.

It is not only a bridge of second-class highway, but also a transportation lifeline connecting both sides of Songhua River and promoting regional economy and port logistics.

After completion, it will completely change the pattern of "crossing the river requires a detour of 100 kilometers" in the local area - this is an important part of the "northward passage" and a landmark project in the comprehensive revitalization strategy of Northeast China.

Part 02: Challenges in Frozen Environments

Dilemma 1: Extreme cold climate, equipment stability test

The lowest temperature on the construction site can drop to minus 30 ℃, which is not only the limit of physical sensation, but also a nightmare for equipment. Hydraulic systems and gear oil are prone to condensation, causing frequent "strikes" in conventional equipment.

Breaking the game:

For extremely cold working conditions, EP400A fully adopts antifreeze hydraulic oil and gear oil, as well as specialized cold protection devices, to ensure smooth start-up and continuous construction of the equipment at low temperatures. The Zhenzhong after-sales team is stationed on site to maintain the equipment status in real-time, ensuring the steady progress of the bridge pier pile sinking task.

Dilemma 2: The "dual shackles" of precision and safety

The bridge pier adopts a steel pipe pile structure, with a single pile length of about 20 meters, a diameter of 2.7 meters, and a burial depth of about 18 meters. The accuracy of pile sinking is directly related to the construction quality of subsequent steel cage and concrete pouring.

Breaking the game:

EP400A adopts zero torque start and zero torque stop, which can avoid resonance damage during the start stop phase, protect the crawler crane and ensure the safety of construction workers. By virtue of its outstanding performance, it safely completed the pile driving operation.

Part.03 Hardcore Strength, Data Speaks

In this extreme challenge, EP400A submitted the following answer sheet 👇：

✅ Resonance free protection: The unique resonance free start/stop technology effectively avoids resonance damage to the crane and structural components, protects the safe operation of the crawler crane equipment, and extends the service life of the entire machine.

✅ Efficient construction: Sinking a single steel pipe pile with a diameter of 2.7m, a length of 20m, and a weight of 27t takes an average of about 4 minutes (at a depth of 18m).

✅ Intelligent adjustable amplitude technology: It has the technical characteristics of stepless adjustment and stopping with vibration, which can adapt to the requirements of pile sinking and extraction in different soil layers, thus achieving ideal pile sinking and extraction speed and efficiency.

✅ Super adaptability: EP400A can maintain stable operation even in low temperature environments of -30 ℃ by using antifreeze hydraulic oil, gear oil, and specialized cold protection devices.

Shanghai Zhenzhong EP400A project site

Part 04 Project Significance and Prospects

A bridge connects the transportation on both sides of the strait, and also links the future.

The stable performance of the Shanghai Zhenzhong EP series resonance free vibration hammer in extremely cold environments has verified the reliable strength of domestic pile driving equipment and provided replicable experience for construction in cold regions.

In the future, let 'Zhenzhong Manufacturing' become a solid force for every bridge.