Experimental Study Saline Subbase With Calcium Carbide Dust

Inshore saline soil is a special soil which has some bad engineering properties, such as collapse, dilatability and erosion and so on. Subbase filling of highway has been one of important geotechnical engineering problems, which restricts the development of highway in inshore saline area. Combining with the highway construction and management, the feasibility of stabilized saline soil for inshore subbase filling is discussed and studied, based on the technical analysis on many laboratory tests. The importance of improvement and application of subbase filling inshore highway is also expounded in this paper.At first, through the research of geographic location and hydrogeological condition of highway which from Qikou to Haifeng in Cangzhou at inshore area, expound the practical problems of the subbase filling applied to the construction of highway which from Qikou to Haifeng in Cangzhou, brought out the disadvantages when improved saline soil does not apply to subbase filling at highway construction in inshore saline soil field. Based on abundant investigation and study both home and abroad on inshore saline soil and improve saline soil as highway subbase filling, the project that the calcium carbide dust and of chemical plant is used as improved material is put forward.The second, this paper selected amounts of calcium carbide dust and fly ash of chemical plant offscum as improved material. The possibility of calcium carbide dust instead of lime are analyzed which emphased on mechanical property. According to plenty of experimental data and some cognition which was acquired before, this paper make pilot study of the solidifying mechanism of stabilized saline soil.At last, construction technique study has been done at Qikou-Haifeng highway. The constructure techniques and corresponding manage games of stabilized for highway subbase filling is expounded and a series of manage procedure is provide for popularize the improve technique at inshore saline soil zone. The importance of the stabilized saline soil for future highway constructure is provided based on previous chapters.In this study, the tests of engineering properties of stabilized saline soil are carried out, which can be used the scientific bases for using stabilized saline soil as subbase filling and provide important reference for the appliance in inshore saline soil area.