High Embankment Of Soft Soil Roadbed Processing Technology And Engineering Application

The post-processing technique of small non-sand pile possessed synthetical function such as consolidation. cementation. swell replacement in vertical and so on, which apply to treat saturated weak soil. powdery clay. clay. simple-filling and mixed-filling foundation which were encountered in the highway bed engineering. The post-processing technique not only apply to treat bed before filling, but also apply to treat bed after filling, the superiority of the post-processing technique was not possessed by other treatment technique. The success of applications for the post-processing technique in the highway engineering provide a new approach for the treatment of highway soft-foundation and bridge head filling, which have great importance for technique and economy.The analysis and study of mechanism for soft-foundation post-processing with small non-sand concrete pile is completed, according to the basic conception of stress-path and the characteristic of technique in the course of construction of small non-sand concrete pile, on the basis of this, the stress-path in the course of construction and the characteristic of the stress-path in the post-processing; By the analysis of stress-path, the method of design for composite foundation on the basis of control condition of carrying capacity is established, which realize the consistence with the technique of ground treatment of buildings and convenience for application of engineering.The design process of composite foundation with small non-sand concrete pileinclude following step: First, according to the kf line of composite foundation,p -equivalent friction angle of composite soil was gained; Second, according tocalculative formula in the code for design of building foundation, the carrying capacity eigenvalue was received. At the resent time, stress formula often apply to the calculation of carrying capacity, certainly, the introduction of relevant parameter is reasonable according to the pore structure. containing water of soil and water-cement ratio of grouting.The examination research of composite foundation with small non-sand concrete pile prove the similarity and reference value of composite foundation with simple-pile and multi-pile, also, the examination testify the efficiency of carrying capacity and settlement of composite foundation with small non-sand concrete pile for highway thick filling area.