This paper systematically introduces booster pump stations (relay pump stations) used in dredging and reclamation projects. It covers the definition, core functions, layout requirements, construction specifications, and typical engineering applications of booster pump stations. The paper also extracts key productivity calculation formulas, parameter tables, and combined construction modes. A real-world case of long-distance and high-lift slurry transportation is analyzed to provide a complete technical reference for engineers, project managers, and construction personnel in port, waterway, reservoir dredging, and reclamation projects.

This professional River Channel Dredging Construction Case from Yanyang Marine outlines a complete, compliant solution for river channel excavation projects. It covers full construction workflow: pre-construction survey, silt & general soil excavation, spoil transportation & disposal, leachate treatment, spoil yard management, and post-construction greening. The plan is optimized for environmental compliance, equipped with industry-leading cutter suction dredgers, and tailored for waterway widening, deepening and silt removal projects, ensuring safe, efficient and cost-effective dredging operations.

This paper introduces ten typical faults occurring during the operation of trailing suction hopper dredgers, including blockages of drag head, suction pipe, mud pump and discharge pipeline, vessel tilt during discharging, mud door leakage, drag head steel cable breakage, sand pumping channel blockage, shore pipe blockage and sand overflow. Corresponding symptoms and on‑site troubleshooting measures are provided for each fault to support safe and efficient dredging construction.

In dredging construction, cutter suction dredgers often encounter various abnormal conditions that require shutdown for handling. Correct judgment and proper treatment can effectively reduce invalid downtime and improve the effective dredging time of construction vessels. This paper summarizes 9 common abnormal conditions of cutter suction dredgers, including suction port blockage, cutter head blockage by hard sticky clay, collision with underwater obstacles, unable to lift transverse mooring anchor, discharge pipeline blockage, dredge pump blockage, water pipeline burst, unable to lift steel piles, and unable to lift cutter bridge. For each abnormal condition, it analyzes the causes, identification methods, treatment measures and preventive strategies in detail, providing practical technical guidance for on-site construction operation and fault handling of cutter suction dredgers.

This paper systematically introduces the preparation of wear spare parts for cutter suction dredgers under different soil conditions, including silty soil, cohesive soil, sandy soil, gravelly soil and rocky soil. It clarifies the selection principles of dredge cutters and pump impellers, analyzes wear characteristics and replacement cycles of flow-passing components, and provides guidance for reasonable spare parts storage and construction efficiency improvement in dredging projects.

This paper systematically discusses the construction safety management of port and waterway engineering. It summarizes the technical specifications and management requirements of safety accident prevention, risk assessment, emergency plan, underwater and in-water operation management, construction electricity, piling, component installation, large construction ship operation, wind and typhoon prevention. A complete safety control system covering the whole construction process is formed to provide reference for on-site safety management and risk control of port and waterway engineering.

This guide provides comprehensive technical insights into cutter suction dredgers (CSD) and bucket ladder dredgers (BLD), two core equipment types in modern dredging engineering. It covers standardized Output Calculation formulas, key operational parameters, and detailed construction methods including spud positioning, lane-by-lane excavation, layered dredging, and barge transportation workflows. The documentation includes precise parameter tables for bucket chain speed, filling factors, and soil classification, alongside step-by-step construction flowcharts and compliance with international dredging standards. Ideal for dredging project managers, technical engineers, and maritime professionals, this resource serves as a practical reference for optimizing dredging efficiency, ensuring construction quality, and meeting project schedule requirements in marine and inland waterway projects.

This article systematically sorts out the full‑life cycle vessel system for offshore wind power projects, including survey vessels, transport barges, crane vessels, pile‑driving vessels, bottom‑sitting platforms, jack‑up installation vessels, floating installation vessels, cable laying vessels, and O&M vessels. It supplements key content including bottom‑sitting construction technology that originated from intertidal wind farms, domestic vessel parameters, completed wind farm lists, global landmark projects, and transport‑installation separation technology. The paper also summarizes industry trends such as deep‑water development, large‑scale turbines, grid parity, and high‑efficiency construction, as well as future directions including big data, intelligent management, and localization of core components. It provides a complete, non‑omitted overview of offshore wind construction equipment for engineering, investment, and operational reference.

This paper introduces the classification, structural characteristics, working principles, operation methods and safety requirements of self-unloading sand barges and self-suction self-unloading sand barges(3 in 1 dredger). The self-unloading sand barge can realize automatic unloading through gravity and conveying system without relying on shore cranes. The self-suction self-unloading sand barge integrates three functions of sand suction, transportation and unloading. This paper also clarifies the applicable scenarios, industry specifications and safety regulations of such vessels, which can provide reference for engineering design, construction operation and safety management.

This document outlines the classification, specifications, and technical features of dredging rubber hoses used in marine engineering. It details the functional differences between suction and discharge hoses, installation variations like floating and submerged hoses, and structural types including flanged and armored hoses. Key specifications cover diameters from DN150 to DN1300 and pressure ratings up to 2.5 MPa. The text emphasizes the composite reinforcement structure, combining soft spiral steel wire helix with high-strength fiber layers to ensure durability, flexibility, and resistance to abrasion and pressure in harsh dredging environments.

This paper systematically introduces the basic structure, classification, main equipment and construction technology of piling barges widely used in hydraulic engineering, bridges, wharves and offshore wind farms. It analyzes the technical characteristics of three typical offshore foundation types and the construction process of steel pipe pile sinking. The development trend of large-scale, multi-functional and environment-friendly piling barges is summarized. In addition, the performance and advantages of hydraulic piling hammers are compared with those of traditional diesel hammers, indicating that hydraulic hammers feature high energy transfer efficiency, low noise and environmental friendliness, making them the preferred equipment for large-scale pile foundation engineering.

This document introduces the standard bollard pull test for tugboats, including test purposes, preparation, procedures, data processing, key precautions and common errors for delivery, retrofit and classification certification.

This document establishes a complete, industry-compliant classification system for modern offshore engineering vessels and special operation ships. It defines six major categories with detailed features and applications for each vessel type, providing a unified technical reference for offshore construction, transportation, operation, and maintenance.

Floating crane, also known as crane vessel or floating crane, is a specialized marine engineering equipment that takes self-propelled or towed floating hull as the supporting and operating device, mainly used for offshore lifting, loading and unloading, marine engineering construction, salvage and other tasks. This document comprehensively elaborates on the basic definition, core components, standard classification (in accordance with GB/T 6974.7-2022), key mechanisms and components, structural design requirements, main functions and application scenarios of floating cranes, and lists major domestic crane vessels, as well as the development status at home and abroad, providing a complete and professional technical reference for relevant practitioners.

This paper systematically introduces the classification, structure, working principle, technical performance, productivity calculation, positioning and moving modes, as well as complete construction procedures and key points of grab dredgers. It summarizes the applicable scope of different grabs under various soil conditions, and clarifies the requirements of trenching, staging, layering and slope excavation. Meanwhile, the advantages and disadvantages of grab dredgers in port dredging, river regulation and waterway engineering are analyzed. The content can provide complete technical reference for construction organization, operation control and efficiency optimization of grab dredging projects.

This document systematically classifies mud barges used in dredging, port construction and waterway engineering, covering closed-bottom, bottom-dump, side-dump and split-hull types. It specifies relevant stability regulations, structural and mechanical technical requirements, and summarizes major operational risks including collision, grab impact, stability loss and mechanism failure. It also provides maintenance suggestions and current development trends of large-capacity self-propelled mud barges in domestic and overseas engineering applications.

This paper studies fault diagnosis and maintenance strategies for hydraulic motors used in engineering vessels under harsh marine conditions. An integrated diagnostic method combining pressure-flow characteristics, volumetric efficiency testing, oil monitoring and trend analysis is proposed. Effective maintenance and preventive measures are provided to improve reliability and service life.

This paper provides an in-depth analysis of the core terms, classic power combinations and applicable scenarios of tugboat propulsion systems, elaborates on azimuth propulsion structures such as ASD/AZI/Z-Drive, sorts out the core performance indicators, supporting equipment and load control methods of tugboats, offers targeted selection suggestions and predicts the industry's decarbonization and intelligent development trends, serving as a professional reference for tugboat design, transformation and operation selection. 英文关键词