强夯置换碎石桩复合地基承载力的试验研究

 为了解决强夯时产生的超孔隙水压力问题, 提出了加固饱和粉土、粉质粘土地基的强夯碎石桩法。工程试验研究表明, 该法克服了一般强夯法对这类场地效果不理想的缺点, 加固后的复合地基不仅碎石桩本身桩体长、影响深、强度高, 而且, 桩间土的承载力得到很大的提高。复合地基比天然地基的承载力提高幅度在一倍以上。工程应用结果表明, 该方法是可行的。

TESTING STUDY ON THE DYNAMICALLY FORMED STONE COLUMN COMPOUND FOUNDATION

In order to eliminate the unfavorable effect of excess water pore pressure induced during dynamic consolidation, a consolidating method with heavily rammed stone columns on saturated silt soil and silt clay is put forward. The engineering testing study shows that the proposed method has overcome the shortcomings of the general dynamic consolidation. The stone columns have high strength and great effectiveness on the ground in depth, and the bearing capacity of soil between the piles is greatly enhanced. The bearing capacity of the compound foundation is two times more than that of natural ground. The application of the method in practical project has proved that the consolidated result with this method is very successful.