choose reasonable tower CRANE foundation form according to Shigongzhouwei's environment
How to choose reasonable tower hanging foundation form according to Shigongzhouwei's environment? In engineering practice, reasonable tower hanging foundation forms should be selected according to the construction layout and the hydrogeological conditions of the construction site. The common options are:
1. Direct use of natural foundations
This situation is applicable to the site where the soil conditions are better, and there is no less than 1.5 m in the depth of the foundation burial, and the characteristic value of the foundation bearing capacity of the soil layer is not less than 210 kPa.
2. Use sand and stone mats for soil layer replacement and indirect use of natural foundations
This situation is applicable to the poor soil conditions of the construction site, but there is a stable original soil layer with a minimum area of not less than 1.5 m within the applicable depth of the foundation of the tower, and the bearing capacity of the foundation is not less than 90 kPa.
When the direct use of natural foundations can not meet the requirements for the bearing capacity of the foundation foundation, it is necessary to replace the inferior soil above the soil layer with a sand cushion.
It should be noted that the bearing capacity of the sand cushion should not be less than 210 kPa after being compacted., The thickness and area of the sand cushion replacement must be determined by calculation.
3. Use of pile foundation as foundation for tower suspension
This generally applies to the construction site where the soil conditions are poor and there is no soil layer in either case within the applicable depth of the tower foundation burial, or where the site is limited to deep burial of the tower Foundation(e.g. buried under the basement floor).
Pile type is in principle selected the same type of pile as the engineering pile to benefit the Shigongfangbian. In principle, the number of piles is 4 to increase the stability of the tower hanging foundation.
