| Popis: |
Recently as the increase of the execution of work for the educational town engineering, the number of the underground constructions have been greatly increased. These constuructions are mostly done by making narrow ditches. Although, when they are paved again after the work, enough rolling compaction is required, it is lacking due to the restricted time and the space. Thus in many cases, after the surface treatment with asphalt mixture, they are overlaid waiting the consolidation settlement. To gain a sufficient rolling compaction the lime stabilization is applied in the refilling soil, and so the good effect has been achieved. This way has made good results, so far. But due to the life limit of the underground installments when a redigging is necessary, it is pointed out that there remainds the difficulty of redigging. To solve these difficulties, QCB as a treatment agent has been developed, The use of this agent increases the internal inflation in the filling soil and as the result redigging can be done easily. Not only that, when this agent is used in place of the quick lime in the lime piling which is used as the stabilization for the deepseated ground, bearing capacity of the mixed soil of both soft soil and the pile and better soil strength constant are improved, but also early bearing capacity and shear stress of the pile, which could not be expected from formal quick lime piling, can be obtained. |
