Hongying Niu

Title: Hongying Niu and Double-Liquid Grouting Technology

Introduction

Hongying Niu is an inventor associated with Shandong, China. Her work includes an invention for double-liquid grouting slurry designed for super-large-diameter underwater shield engineering under high water-pressure conditions. The supplied information lists 1 patent.

Latest Patents

Niu’s patent, “Double-Liquid Grouting Slurry, Its Technology and Application for Super Large Diameter Underwater Shield Engineering Under High Water Pressure Condition,” describes a two-part grouting material and its preparation and application.

Slurry I combines cement clinker, slag, fly ash, steel slag, bentonite, limestone tailings, a water-reducing agent, and cellulose. Slurry II contains short-cut fiber, sodium silicate solution, and viscous polymers. The disclosed preparation process includes crushing, screening, milling, and group mixing at different speeds.

During grouting, the patent specifies a slurry I-to-slurry II volume ratio ranging from 1:1 to 10:1. It also describes injecting the slurry into the shield void using six-point grouting at the shield tail and synchronous grouting techniques for 3+2+1 segment splicing.

Career Highlights

The supplied career information associates Niu with Ocean University of China and China Railway 14th Bureau Group Corporation Limited. Her listed invention addresses grouting materials and application methods for demanding underwater shield construction.

Collaborations

Fei Sha and Jian Chen are identified as Niu’s coworkers.

Conclusion

Hongying Niu’s listed patent focuses on a two-component grouting system and construction techniques intended for high-pressure underwater shield engineering.