256HC Mast Section Tower Crane Foundation practice key words: Tower Crane Foundation Practice
First the foundation tamping or make 1 Layer 3∶7 lime soil cushion, then paving crushed stone ballast, then placing wooden sleeper, laying steel rail on the sleeper. This method of timber consumption is large, short service life, is not suitable for heavy-duty tower crane. The recommended method today is to erect a reinforced concrete base plate or a reinforced concrete sleeper beam on a compacted foundation, to fix and install i-beams with embedded parts on the base plate or sleeper beam, and then to install rails on the i-beams. In order to improve the efficiency of track laying and save the cost of track laying, the reinforced concrete sleeper beam, i-beam bracket and rail are often assembled together to form a 12.5 m long assembled reinforced concrete rail foundation. This kind of track foundation is very suitable for FO / 23b, HK40 / 21B, H3 / 36b and other heavy-duty self-elevating tower cranes. Block reinforced concrete foundation is the most suitable type of fixed self-lifting tower crane with bottom frame. The size of this concrete foundation plate can be 200cm ~ 200cm ~ 50cm on the foundation with high ground resistance The top and bottom of the plate shall be reinforced in both directions. If the tower crane must be installed near the deep foundation pit, the bored pile cap foundation should be adopted to ensure the firmness and stability of the Tower Crane Foundation. The foundation of the fixed self-lifting Tower Crane must meet two requirements: first, the upper load of the tower crane should be evenly transmitted to the foundation and should not exceed the ground endurance;
256HC mast section is the best in this field
Second, the tower crane in a variety of adverse working conditions can maintain the overall stability without tipping. Therefore, the foundation volume of the tower crane is very large, the foundation weight should be equivalent to the weight of the Tower Crane Weight. The foundation weight of the Fixed Tower Crane is closely related to the free height of the tower crane When the Free Height of FO / 23b tower crane is 59.8 m, the size of concrete foundation should reach 6.5 m 6.5 m 1.7 m. If the tower crane should be installed near the deep foundation pit in the construction stage, and the soil quality in the surface layer is poor, the foundation must be supported by bored piles. Therefore, in order to save the cost of foundation construction, it is appropriate to decompose this monolithic mass concrete foundation into several precast concrete slabs, thus forming an fabricated reinforced concrete foundation for repeated use To minimize the cost of the Tower Crane Foundation to be decomposed on each project.
256HC mast section is the best in this field
