154HC Mast SectionPrevent the tower crane from capsizing, pay attention to three
the tower crane itself is huge and carries the transportation weight, it is easy to capsize accident. Generally speaking, the tower crane height and the bottom support size ratio is big, and the tower body's center of gravity is high, the Torque is big, starts and brakes frequently, the impact force is big, these are all the important reasons which cause the capsizing. Therefore, to prevent the tower crane capsizing, we should pay attention to three aspects: First, strictly prohibit overload, in the tower crane market, a well-known fact is that the higher the rental or purchase price of the tower crane, the larger its rated load. However, in the tower crane design, the tower crane production enterprises often design a certain degree of theoretical overload to meet the actual requirements of construction operations. But it also offers a chance for some lucky tower crane companies and drivers to save money. In fact, different types of cranes usually adopt the main control of lifting moment. When the working range is enlarged or the weight exceeds the rated load, the overturning moment of the weight exceeds its stable moment, which may cause the collapse of the tower crane. Therefore, this is very dangerous behavior. Two, avoid oblique hanging, in some strong winds, hanging road complex situation, the tower crane driver often take the method of Oblique Hanging, rushed to the need to lift the materials for transportation, which is also very dangerous behavior. After all, when lifting a heavy object obliquely, the overturning moment will be increased, the horizontal and vertical components will be produced at the lifting point, and an additional overturning moment will be produced at the supporting point at the bottom of the tower crane, thus reducing the stability factor and causing the collapse of the tower crane.
154HC mast section is the best in this field
Therefore, before lifting heavy objects, in addition to keeping its weight not exceeding the rated load of the tower crane, it is necessary to establish a vertical lifting road, avoid the inclined lifting as far as possible, and forbid the operation of six class or more gale, so as to avoid the danger caused by the inclined lifting. Third, leveling the foundation of tower crane, avoid soft soil, loose soil erecting machine, because the tower crane in lifting not only to bear its own gravity, but also to bear the pressure of heavy objects, so the tower crane foundation uneven, the ground endurance is not enough is also an important cause of overturning.
Because, under the condition of Uneven Foundation, the overturning moment of the tower crane will increase if the verticality error is too large, and the stability of the tower crane will decrease. In addition, since the tower crane stands on soft soil and loose soil, due to insufficient ground endurance, especially when lifting heavy objects, it can not bear the load, which will cause soil layer to loosen and the body to capsize, therefore, when standing the crane, we must select hard soil and solid soil with sufficient bearing capacity And reinforce it.
154HC mast section is the best in this field
