L68B2 Mast Section The depth of the Tower Crane Foundation must be decided according to the geological conditions
ower Crane Foundation depth must be decided according to the geological conditions. Because the tower crane as a large-scale construction machinery, as the Tower Crane Foundation, not only the bearing capacity requirements, but also anti-overturning and stability requirements. Therefore, the depth of the foundation must be determined according to the geological conditions. For the Tower Crane Foundation generally used with the supporting standard drawings to carry out specific construction, the standard drawings have requirements of the minimum height design content, these should be met the most basic requirements. As for how the top elevation should be determined, reference can be made to the 0.000 soaring buildings as the preferred reference. In this way, it is convenient to install the additional safety system of the tower crane to ensure the safety of the tower crane.
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Pile Foundation technical specification JGJ94-2008, this is the latest, just attended an expert demonstration meeting, a construction unit still quoted JGJ94-94 in the specification, this should be noted, the specific building owner himself to see the test specification, please the building owner to see JGJ106-2003, in fact, the static load test is mainly used to test the bearing capacity of piles. The loading and unloading methods should be in accordance with the following stipulations: 1 loading should be carried out in stages, and the loading should be carried out in equal quantities step by step; the grading load should be 1 / 10 of the maximum load or the estimated ultimate bearing capacity The first stage can be twice the step load 2 unloading should be carried out in stages, each stage unloading capacity is 2 times of the stage loading, and the unloading capacity is equal to the stage by stage The load shall be transferred uniformly, continuously and without impact during loading and unloading, and the change of load in each stage shall not exceed 10% of the increment or decrement of the stage.
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