Cause Of Roadbed Frothing Saline Soil Area

Qinghai province wide distribution of saline soil, soil salinization, the saline soil belongs to many area. Highway construction in saline soil area, due to the lack of building materials, distance away, to reduce the cost often obtain raw material locally, road building materials containing high salt, even affect ordinary material does not contain salt in saline environment will be affected by long-term also,produce secondary salinization phenomena. The properties of saline soil in the physical, chemical, mechanical and other aspects of the highway, very susceptible to these properties and the emergence of some special diseases, serious impact on road use function, shorten the service life, need to invest a lot of money torepair and maintenance. But the repair and maintenance can notprevent the occurrence of diseases fundamentally, the following year diseases will appear in succession. To fundamentally solve these diseases, must produce the disease mechanism of in-depth study, an antidote against the disease.In this paper, the freezing and thawing were the formation and development process in detail is introduced, specific analysis of soil, water, temperature, the influence of the load of pumping. Due to saline native some physical mechanics, chemistry and engineering characteristics, make its pumping in subgrade as degree, duration and management method has the characteristics of different from the saline soil subgrade. In reference on the basis of relevant research data, this paper combined with the saline content change rule as the solution and saline soil moisture migration patterns in the body analysis, from the saline soil subgrade and the difference between ordinary soil, and the reasons for these differences, it is concluded that under the condition of the same natural saline soil road to this degree, influence of the period were relatively common soil serious, long-term conclusions.In this paper, on the basis of theoretical analysis, combined with the concrete engineering example, analysis used in engineeringtreatment measures are reasonable, and proposes the improvement method or a new treatment plan, I hope this researchcan be better applied to practice, for the saline soil area highway design, construction, management and maintenance play a guiding role in order to improve saline soil area, highway service level and the service life, and promote the development of highway construction in saline soil area.