1. Core Pipe: The core pipe is the innermost layer of the composite pipe, and it can be made of materials such as steel, GRP (Glass Reinforced Plastic), GRE (Glass Reinforced Epoxy), HDPE Corrugated (High Density Poly Ethylene). The choice of the core pipe material depends on the specific requirements of the project.
2. Reinforced Concrete Surround: The core pipe is surrounded by a layer of reinforced concrete, which provides additional strength, durability, and protection. The concrete surround is typically reinforced with steel bars or mesh to enhance structural integrity.
3. Jacking Pipe Features: In certain applications, these composite pipes are designed for jacking, which involves pushing or pulling the pipe into place underground without the need for open trench excavation. Jacking pipes may have special features to facilitate this installation method.

Uses:

1. Underground Utility Conduits: Composite pipes with reinforced concrete surround are commonly used for the installation of underground utility conduits. They serve as conduits for various utilities, such as water mains, stormwater drainage, sanitary sewers, and telecommunications.
2. Tunneling and Jacking: In projects that involve tunneling or jacking operations, these pipes are used to create underground passages for utilities without the need for extensive open trench excavation. This is particularly beneficial in urban areas with limited space or when avoiding disruption to existing infrastructure is a priority.
3. Culverts and Drainage Systems: Composite pipes are suitable for culverts and drainage systems, where they can effectively convey stormwater, preventing flooding and erosion in transportation corridors and urban areas.
4. Pipeline Rehabilitation: In some cases, composite pipes are used for the rehabilitation or replacement of aging or damaged pipelines. The reinforced concrete surround adds structural strength and durability to the pipeline.

Benefits:

1. Strength and Durability: The combination of materials, particularly the reinforced concrete surround, provides the pipe with high structural strength and durability. This makes it suitable for withstanding external loads, ground pressures, and environmental factors.
2. Corrosion Resistance: Depending on the core pipe material chosen (such as HDPE or FRP), composite pipes can offer corrosion resistance. This is especially advantageous in applications where resistance to chemical corrosion is crucial.
3. Jacking Capability: In projects involving trenchless installation methods like jacking, composite pipes are designed to withstand the forces associated with being pushed or pulled into place. This can minimize the need for extensive excavation and reduce disruption to the surrounding area.
4. Customization: Composite pipes can be customized based on project requirements, including the choice of core pipe material, dimensions, and reinforcement specifications. This flexibility allows for adaptation to diverse project needs.
5. Reduced Maintenance: The durability and resilience of composite pipes contribute to reduced maintenance needs over their service life. This can lead to long-term cost savings for infrastructure owners and operators.
6. Environmentally Friendly: Composite pipes are often considered environmentally friendly due to their longevity and resistance to corrosion, which can reduce the need for frequent replacements and repairs.

In summary, composite pipes with reinforced concrete surround are versatile solutions for various underground infrastructure projects. Their combination of strength, durability, and customization options makes them suitable for applications ranging from water and sewer systems to culverts and jacking operations.