Comprehensive Treatment Technology To Soft Clay Foundation Of Outskirt Expressway In Foshan City

With the rapid development of the economy, China has carried out the infrastructure construction at a high speed. The way to reasonably and scientifically solve the engineering problems will have a significant effect on the quality, investment and the construction term of each engineering work. The most important problem in the roads construction is the treatment to soft clay foundation. As the foundation for the roads, the quality will influence the duality of the roads directly.Through studying abundant paper and researches, learning the world wide research results in this field, and comparing each result, this paper, taking the example of the road construction in Foshan, makes a study on three methods of the soft soil treatment in terms of theory, construction progress and quality control, etc.This paper concludes that people should choose the engineering methods which can maximally make use of resources and minimally reduce the damage to the environment, avoid affecting the daily life of the people. This paper confirms the sinking and lifting speed through the problem of aiguille unstably lifting and sinking during the process of cement mixed piles test; it also solves the problem of the unequal pressure of mud pump and the aiguille stasis. Through enough trials, this articles also confirms the hydraulic fill Productivity, best moisture content, and best Intensity; in the meantime, a smooth drainage method of the hydraulic fill water should be taken to avoid the pollution to the environment during hydraulic fill sand.It is confirmed that making full use of the local sand and stone resources can effectively avoid the disadvantages of taking earthwork from other places. Sand fill roadbed can be easily and speedily constructed, guarantee a higher quality, take up less farming land and have less negative effect, achieving a good social and economic benefits.Through a theoretical calculation on the CFG pile, this paper proves that it can achieve a good effect on the packing of the foundation; also, this paper does the theoretical alculation of the reasons for the process of pilling, demonstrating the working theory of CFG pile through the observation of the lifting and sinking. With the combined effect of pile and soil, the foundation sink degree can be effectively reduced. Meanwhile, CFG pile can be assively introduced to use as it is easier to conduct with less investment and more effects.