What types of cement pipes are available in Zhengzhou?

Next, let's introduce the types of Zhengzhou concrete pipes available.

Sleeve and socket reinforced concrete cement pipes

The joints are sealed with rubber rings (sliding rubber rings provide better sealing than rolling rings), and are classified as flexible connections. The insertion depth of the joints is 1.5 (80-100mm), with good relative angles. They can withstand uneven ground settlement and are challenging to control the depth of the pipe base pit. When the joint backfill is not compact, they exhibit good seismic performance.

2. Plain Concrete Pipe

Plain-end concrete pipes, also known as reinforced concrete pipes, are a type of concrete pipe made from a solid material of cement and steel. Moist soil allows the curing process of plain-end concrete pipes to continue, with the pipe's strength and hardness increasing over time. Therefore, many drainage pipelines now utilize such pipes, which offer corrosion resistance and durability.

3. Flexible expansion joint reinforced concrete cement pipes

The interface is sealed with a sliding rubber ring for a flexible connection. The insertion depth of the interface is approximately 135mm, deeper than the plug. The interface has a relative angle of 1.5°, offering excellent seismic performance and effectively resisting uneven settlement of the foundation. The base can be either sandstone or concrete, with faster and better installation speed than the plug.

4. Directional Drilling Cement Pipes

The pipe-jacking method for cement pipes is an underground construction technique that has developed following the shield tunneling method. It does not require surface excavation. During pipe-jacking construction, the tool pipe or tunneling machine is propelled through the soil layer from the working shaft to the receiving shaft, utilizing the thrust from the main jacking cylinder and the intermediate chamber between the pipe. Concurrently, pipelines are buried between the two shafts, following the tool pipe or tunneling machine, to achieve the construction of underground pipelines without excavation.