The Preliminary Study On Indoor The Test Condition Of Subgrade Soil Freeze Stability

The influence factors of subgrade module are plenty, if we want to earnest appraise the subgrade on the bearing capacity, carries on reasonably the value in the structural design of subgrade module, but also needs to make massive research work inside and outside. This paper is must aim at the subgrade actual existence condition and the natural environment, study the change rule of its freeze stability through indoor experiment, and try to find out initially one kind of appraisal subgrade soil freeze stability test method indoor, for freezed area to forecast scientifically from now on the subgrade condition and determined reasonably the subgrade the module will make certain contribution.We have referred to the research results, independently developed"the TLD-70 soil freezing experiment box". Unified the hydrology, the meteorological data of the earth scene which taken locality from Jilin Province, aims at 3 kinds of typical subgrade soils which Jilin Province provides to carry on under the controlled condition freezing and thawing test indoor, studies the change rule of the humidity condition and the bearing capacity, in complex freeze environment. In the experiment, we mainly analysis the module, frost heaving, thaw settlement in freezes under the condition to the subgrade soil, the soakage change rule have carried on the actual, and have carried on fast and slow experiment contrast analysis in several primary factors that affected the roadbed to freeze the characteristic: The initial moisture content, the freeze speed, the load and so on.We use the data single target direct-viewing analysis method, judges various factors auxiliary pole difference the size to determine this factor to experiments the target value the influence. Then obtains in the experiment best or the most most disadvantageous test condition combination.Finally, because the earth in freezes condition its freezing and thawing process is extremely complex, but indoor experiments restrict by the instrumentation equipment, consumed energy, time factors and so on, cannot simulate outdoor situation completely. Therefore, this article only is freezes the stability test condition preliminary study to the subgrade soil, try to find out some experiments feasible test condition, and has been clear about various...