The Study On The Interaction Of Stake-raft Foundation And Soil

Constructure system is make up of three parts including upperstructure,foundation and foundation soil. They are working together as a whole.In this text,the common function of raft foundation and the foundation soil commences from the stake, taking sinking to decline to prognosticate a value as to contrast terrace, passing to existing research result raft foundation to be subjected to the dint influence to compare bigger factor to the stake: stake the long path ratio,stake be apart from the analytical calculation that the path ratio,the raft plank and the flexible mold quantity ratio,stake mold quantity with flexible soil of the soil compare, find out each,side stake,medium stake is proceed energetically for,to construct end sink to decline and stake the soil lotus carry to share a circumstance of influence, get is some to settle sex,fixed amount and beneficial conclusion.1. The upper part and the raft of the knothole plays an important role in sank . The raft and the soil flexible at 3≤lg(Et/E0)≤4, the sank of the upper parts is declining as the flexible mold the quantity decrisinging. But the rft and the soil flexible at lg (E_t/E₀)≥4, Decling of the sinking is not obviously. The explaination is the upper part structure and the raft knothole is not limited. Compare the long of the stake with the radius, decling the radius of the stake is better than increasing the longth of the stake.2.From the anti- dint of the stake crest, the cape stake is the biggest, the side stake second, the middle stake is the smallest. As a result,in the method of the gengeral designing is not scientific. Especially in the foundation designing,with the whole stake is waste,It's advised that exchange the general method of designing:with short stake in the middle of the raft foundation and more stake at the stake of the raft foundation. From the text,increasing the longth of the stake is better than decling the distance of the stake. It's palys an important role in designing. 3. Form the carrying load of the soil between the stake, the soil between the stake can undertake parts of loads, the loads of the undertake is between 5%-30%. The loads of the undertake size is influenced by upper structure, the long of the stake , the size of the raft foundation, the size of the distance between every stakes.Through the anlyze of the software(ANSYS),the traditional method of designing is limited. In other words,it's not economy. Sometimes, parts of the structure is not safe.