Strong mobility and wide use range, it can easily transfer the site and must be on a flat and hard ground to work normally

Consistent allotropic turnover stability

Perform full-week operation within 360°

Drive with load, great operational adaptability

It has high ground adhesion, strong climbing ability and small turning radius

No need for leg support, can be loaded

The weight of the object to be held (equipment or component) in the lifting state and the weight of the lifting and rigging (the flow crane includes the weight of the lifting wire rope that hangs down from the head of the boom to the hook

The lifting weight should not exceed 75% of the total lifting weight allowed by the two lifting machines. The load of each lifting machine should not exceed 80% of its safe load.

The curves that reflect the lifting capacity and maximum lifting height of the mobile crane change with the arm length and amplitude are called lifting weight characteristic curves and lifting height characteristic curves respectively.

The treated foundation is subject to stress resistance test (usually used pressure and weight method or ask a third-party testing agency to conduct the test)

The foundations of lifting and crane positions on horizontal and hard ground need to be processed

Based on the measured ground pressure resistance, the treatment is carried out using a suitable method. When lifting heavy equipment on complex foundations, professionals should be asked to design the foundation specifically and prepare foundation treatment plans.

Specification

Safety factor (20 cases)

The role of hanging beams (balance beams) (more than 20 cases, 22 cases)

Design factors of hanging beams (18 singles)

Rated traction tension, working speed, and capacity of rope (the actual wire rope diameter is different from the diameter on the nameplate, the capacity of rope is verified ~ 17 or 18 singles)

Pull-up type (lift type)

Climbing type (pole climbing type)

Overload, leg unstable, mechanical failure, lifting boom elevation angle exceeds limit (45°~78°)

The load distribution of multi-machine lifting is not uniform in multiple machine lifting capacity; the command and coordination errors of multiple actions and multiple positions, and the mast system cable and wind rope and ground anchor are instable

The design is inconsistent with the lifting force, and the stiffness of the equipment or components is relatively small

The ground anchor structure should be designed and selected based on the stress conditions and the geological conditions of the construction area; the production and setting of ground anchors should be calculated and verified according to the provisions of the special lifting construction plan.

In front of the buried ground anchor foundation pit, there should be no trenches within a range of 2.5 times the depth of the pit in the direction of the cable wind rope. Cables, underground pipelines, etc.

When backfilling the embedded ground anchor, it is compacted or compacted by pure land layer, and the backfilling height should be higher than the surroundings of the foundation pit. The ground is above 400mm and must not be immersed in water. Records of hidden projects should be made after the ground anchor is set up.

After the embedded ground anchor is set up, the stressed rope buckle should be pre-tightened.

Project characteristics; Equipment parameter table: equipment name, quantity, equipment position number, main body material, etc.; construction plan layout; state before lifting

Equipment specifications, total equipment weight, total lifting weight, center of gravity elevation, lifting point orientation and elevation

Preparation instructions, project overview, lifting process design, machinery, lifting points and reinforcement, process drawings, ground anchor construction drawings, and foundation treatment measures for lifting area

For changes in lifting methods, changes in types of lifting equipment, and replacement of main machine rigging and materials, the lifting plan implementation unit (or plan preparer) should write a written change application, attach necessary calculations and explanations, and report to the original lifting plan approval unit and personnel. Only after approval can it be implemented according to the changed content.

Based on the content of the lifting plan and design drawings, the focus is on project characteristics, lifting procedures, process methods, technical keys and safety measures.

Construction of embedded ground anchors, foundation treatment, compaction and reinforcement of lifting sites

Before lifting major equipment, lifting capacity tests should be carried out on newly designed and manufactured masts and other lifting machinery, homemade lifting beams, and slings to determine their maximum load capacity. Such as tensile test of embedded ground anchor, pressure test of foundation, operation and braking test of winch, etc.

During the trial lifting, special personnel must be set up to observe and monitor some important lifting links and parts, and special attention should be paid to the occurrence of some abnormal situations. The trial hanging time should not be controlled at about 10 minutes too long. The distance between the equipment leaving the ground during the trial lifting should not exceed 100mm. After the trial lifting, a comprehensive inspection of each lifting machine rigging must be carried out. Measures should be taken to resolve the abnormal situations that occur, and another trial lifting should be carried out if necessary.