Single beam crane foundation construction should pay attention to the details
Posted: Dec 10th, '24, 01:15
Single beam crane (single beam crane) is a more powerful lifting and transportation equipment, widely used in construction, transportation and other industries. The crane to turn the boom is composed of a driving device and a slewing support device. The metal structure is the skeleton of the crane, the main bearing parts such as bridge, boom and gantry can be box structure or truss structure, can also be web structure, and some can be used as supporting steel beams. When the lifting device can be placed on the ground or below the top surface of the track, the lowering distance is called the drop depth. That is, the vertical distance between the lower working position of the spreader and the horizontal supporting surface of the crane. For the boom type crane, its rated lifting weight changes with the amplitude, and its lifting characteristics are characterized by lifting torque. The value indicated on the sign is the larger lifting weight. Because the single beam foundation is a huge steel structure system, its stability is particularly important. In the accidents of Single beam crane, the collapse of column Single beam crane caused by unqualified foundation accounts for a large proportion. So, in order to avoid tower crane accidents, what details should be paid attention to in the foundation construction of single-beam crane?
According to the analysis of the production and use experience of the Single beam crane, the causes of the foundation accidents of the single beam crane are as follows:
In some construction units, it is possible to analyze the excavation working environment near the tower crane foundation, which leads to landslide displacement and tower crane accidents.
2, part of the construction site, due to the insufficient strength of concrete, tower crane bearing more than the ground stress limit, in order to seize the construction period, resulting in collapse and overturn accidents;
3. In recent years, many cities in China have produced groundwater funnels due to groundwater overextraction, resulting in uneven groundwater settlement, affecting the operation and construction of single-beam cranes.
Therefore, in order to prevent the Single beam crane collapse accident, the construction unit must ensure that the ground durability meets the design requirements when making the single beam crane foundation, and the reinforced concrete strength is not less than 80% of the design value. For the tower crane foundation with basement engineering, special treatment measures should be taken, such as piling under the foundation, and welding the reinforcement bar of the pile end firmly with the foundation bolt. The bottom of the concrete foundation shall be smooth and compacted, and the bottom of the foundation shall not be the bottom of the tank. The size errors of foundation anchor bolts can be constructed in strict accordance with the requirements of the foundation drawings. Anchor bolts should be kept above the ground for a sufficient time, and each anchor bolt should be pre-tightened with double nuts. Before installation, the foundation surface should be treated to ensure that the levelness of the foundation does not exceed 1/1000. At the same time, the tower crane foundation shall not accumulate water, resulting in uneven settlement of the tower crane foundation. No pits shall be dug near the single beam foundation at will.
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According to the analysis of the production and use experience of the Single beam crane, the causes of the foundation accidents of the single beam crane are as follows:
In some construction units, it is possible to analyze the excavation working environment near the tower crane foundation, which leads to landslide displacement and tower crane accidents.
2, part of the construction site, due to the insufficient strength of concrete, tower crane bearing more than the ground stress limit, in order to seize the construction period, resulting in collapse and overturn accidents;
3. In recent years, many cities in China have produced groundwater funnels due to groundwater overextraction, resulting in uneven groundwater settlement, affecting the operation and construction of single-beam cranes.
Therefore, in order to prevent the Single beam crane collapse accident, the construction unit must ensure that the ground durability meets the design requirements when making the single beam crane foundation, and the reinforced concrete strength is not less than 80% of the design value. For the tower crane foundation with basement engineering, special treatment measures should be taken, such as piling under the foundation, and welding the reinforcement bar of the pile end firmly with the foundation bolt. The bottom of the concrete foundation shall be smooth and compacted, and the bottom of the foundation shall not be the bottom of the tank. The size errors of foundation anchor bolts can be constructed in strict accordance with the requirements of the foundation drawings. Anchor bolts should be kept above the ground for a sufficient time, and each anchor bolt should be pre-tightened with double nuts. Before installation, the foundation surface should be treated to ensure that the levelness of the foundation does not exceed 1/1000. At the same time, the tower crane foundation shall not accumulate water, resulting in uneven settlement of the tower crane foundation. No pits shall be dug near the single beam foundation at will.
Choose BONOVO for high-quality, customizable brush cutters for skid steers with fast delivery. Contact us today to discover how our superior products can enhance your land management tasks!
for more info just visit our website at www.bonovogroup.com
contact # : +86 158 6218 2088
email : sales@bonovogroup.com