Hydraulic cylinders are widely used in engineering construction, mainly to achieve stable and controllable power transmission through hydraulic systems. It can convert hydraulic energy into mechanical energy, which is used to push, lift, support and control heavy objects or equipment, and plays a vital role in many engineering construction projects. The following are some of the main application areas of hydraulic cylinders in engineering construction:

1. Lifting and handling
Hydraulic cylinders are commonly used in various lifting equipment, such as tower cranes, crawler cranes, truck cranes, etc. These equipment use hydraulic systems to lift, carry and place heavy objects. Hydraulic cylinders can provide strong thrust and adapt to various complex working environments.
Tower crane: Hydraulic cylinders are used to lift and retract the boom, providing enough power to carry construction materials.
Truck crane: Hydraulic cylinders are used to adjust and lift the boom to complete accurate load movement.

2. Earthwork
In earthwork, hydraulic cylinders are widely used in excavators, bulldozers and other equipment. Hydraulic cylinders drive buckets, shovel arms and other components to perform soil excavation, bulldozing, leveling and other operations.
Excavator: Hydraulic cylinder controls the movement of the bucket to perform various actions such as digging, pulling, and pushing.
Bulldozer: Hydraulic cylinder drives the bulldozer to perform ground pushing, leveling, demolition and other operations.

3. Concrete construction
Hydraulic cylinders are also used in equipment such as concrete pump trucks and concrete mixer trucks. Through the hydraulic system, hydraulic cylinders can control operations such as concrete pumping, pouring, and lifting to improve the efficiency and accuracy of concrete construction.
Concrete pump truck: Hydraulic cylinders control the extension and rotation of the pumping pipeline to achieve concrete transportation.
Concrete mixer truck: The hydraulic system drives the rotation of the mixing barrel to ensure the uniformity of concrete during transportation.

4. Bridge construction
In bridge construction, hydraulic cylinders are used to support bridge components, lift prefabricated bridge sections, and adjust the position of bridge components. Hydraulic technology can control these operations to ensure the safety of bridge construction.
Bridge construction: Hydraulic cylinders can control the lifting, positioning and assembly of bridge components, especially during the installation of prestressed beams.

5. Tunnel boring
Hydraulic cylinders are also widely used in tunnel boring machines (TBMs), mainly used to push and support the working parts of tunnel boring machines, such as cutter heads, propulsion devices, etc.
Tunnel boring machines: Hydraulic cylinders drive the cutter heads to cut rock and soil, and push the equipment forward in the tunnel.

6. Support and adjustment of heavy equipment
Hydraulic cylinders are also widely used in the support, stabilization and adjustment of heavy equipment, such as in the extension and retraction of the legs of construction equipment, lifting and lowering.
Lifting platforms: Hydraulic cylinders are used to lift and lower working platforms so that they can work stably at different heights.
Temporary support structures: In some construction projects, hydraulic cylinders are used for temporary support structures or equipment to ensure stability during construction.

7. Aerial work
Hydraulic cylinders play a vital role in aerial work platforms (such as lifting platforms and scaffolding lifting systems). They help aerial platforms to rise and fall stably and ensure that workers work safely.