Result correction and error analysis of the loess staturated yielding test by double line method

The dynamic characters of water contents of collapsible loess are analyzed based upon trial curves obtained from indoor compression test and collapse tests carried out by single line method and double line method.

Through comparing empirical formula obtained from double line method compression test with collapsibility coefficient calculation formula given from standard,it concluded that the calculation results were uniform, while empirical calculation formula was simpler in calculation procedure,which saved time and made working efficiency enhanced obviously.

Single-line method and double-line method were adopted respectively to carry out uniaxial compression test on undisturbed loess (Q3) in the case of moistening or demoistening.

Single-line method and double-line method are adopted respectively to carry out uniaxial compression tests on undisturbed loess(Q3) in the case of moistening or demoistening.

Aiming at the problems occured in the engineering application about the double-line method of collapsibility test of loess, a correction is given in the paper, striving for the unification of the collapsibility indexes of loess, and providing accurate and resonable testing data for practical engineering project.

Based on about 700 days creep experiment of RC beams,long-term deflection of cracking RC beams were predicted by meaning of bilinear method,a program was compiled,the results fit the test data nicely,and analyzed parameters which affect long-term deflection of members,the method used in the paper is c.

There are many methods of scaling pictures,the common of which are snapshot method,average method and bilinear method.

Forecasting ultimate bearing capacity of single squeezed branch pile by hyperbola method;

The ultimate bearing capacity of the single screwed pile was predicted based on the six piles with screws from four different sites by hyperbola method.

When the fracture load was not reached for a trial pile, the ultimate load of the pile might be predicted according to the field-surveyed load settlement data of existing trial piles and by P-S curve extension method and hyperbola method, among which, the P-S curve extension method had better adaptability.

The application and analysis of hyperbola method in soft foundation settlement calculation;

The most value of settlement calculated by hyperbola is bigger than the final settlement by measuring.

Several methods of calculating the settlement of soft soil ground are introduced, including the hyperbolic method, Asaoka method poission curve and Genetic algorithm.

Several methods of calculating the final settlement of soft soil ground are introduced,including the hyperbolic method,index curve method,threepoint method and Asaoka method.

Based on the practical data of soft ground settlement of Sixin Road in Wuhan City,this paper introduces the process in which hyperbolic method,Asaoka method and three-point method are used to calculate the final settlement of the soft ground.