G15 Shenhai Expressway Dagu River Bridge Underwater Pier Strengthening Project
The G15 Shenhai Expressway Dagu River Bridge Substructure Rehabilitation Project focused on underwater strengthening of bridge piers using a fiberglass sleeve jacketing system. The site involved wet and partially submerged conditions, where bonding, sealing and grouting materials needed to perform reliably without washout.
For this project, Sino-Sina Building Materials Co., Ltd. supplied a complete underwater repair material system:
CBGM Underwater Anti-Washout Injection Grout – used for underwater injection, void filling and repair around damaged pier sections, with stable anti-washout performance in wet conditions.
EGM-100S Underwater Epoxy Grout – used where high bonding strength, durability and low-shrink epoxy grouting were required.
ZRETE Underwater Adhesive – used for bonding and sealing fiberglass sleeves to concrete surfaces in underwater or damp environments.
The material system supported fiberglass sleeve installation, underwater bonding, joint sealing and annular gap grouting around the bridge piers. It helped improve the integrity of the repaired substructure, reduce water erosion risks and extend the service life of the bridge pier system.
This project demonstrates ZRETE’s ability to provide practical material solutions for underwater bridge repair, pier strengthening, fiberglass sleeve reinforcement and submerged concrete rehabilitation.
Dagu River Bridge underwater pier damage survey before fiberglass sleeve repair
ZRETE underwater adhesive applied during fiberglass sleeve bonding
Fiberglass sleeve installation for Dagu River Bridge pier strengthening
Bridge substructure rehabilitation using underwater grout and fiberglass sleeve system
Underwater bridge pier strengthening materials for fiberglass sleeve installation
Related Products
CBGM Underwater Anti-Washout Injection Grout
CGM Underwater Anti-Washout Injection Grout is a rapid-setting cementitious grout for tunnel waterproofing, underground void filling and wet-condition reinforcement. It offers stable slurry performance, no bleeding and controlled expansion in water-bearing repair zones.
EGM-100S Underwater Epoxy Grout
EGM-100S is a high-strength underwater epoxy grout developed for submerged structural repair, marine rehabilitation and jacket-based pile restoration. It provides self-leveling flow, dense filling and durable underwater bonding in harsh service conditions.
CBGM Marine Anti‑Corrosion Non‑Shrink Grout
A cementitious, shrinkage‑compensated grout designed for coastal and marine infrastructure, where chloride ingress and sulfate attack can shorten service life. Available in multiple grades (CBGM‑1 to CBGM‑4) for different placement and thickness needs.
High-performance two-component epoxy adhesive for concrete and steel bonding in underwater and high-humidity environments. Delivers excellent bonding strength, chemical resistance, and construction efficiency.
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