Raft foundation ground safety negative

[aramerproje]

I am making a project surrounded by 6 meter high curtains. It will be used as a well. however, the raft does not save the foundation when I analyze it differently. What could be the reason for this? the project is attached. I would really appreciate if you can help. good work everyone

 

[HakanŞahin]

I am making a project surrounded by 6 meters high curtains. It will be used as a well. However, when I analyze it differently, the raft does not save the foundation. What could be the reason. The project is attached. I would be very grateful if you could help me. Good work everyone[ /quote] Soil safety stress is not provided in vertical g+q loading (Zg+q =15.80 tf/m2 > Ground=13.3 tf/m2) The reason why the ground safety stress is higher in vertical is the extra coating and live loads in the raft slab. tf/m2 extra load is defined. If these values will be as you entered, you must enlarge the raft base area in order to provide the ground safety value. Also, the raft thickness is 80 cm. For example, if you make a 30 cm raft thickness, you will also achieve a 50 cm self-load reduction (0.5 *2.5 =1.25 tf/m2 your load will decrease.)