Study Of Improved Roadbed Stuffing Experimentation On Luozhan Railway (From Yong Zhou To Chen Xi)

The Paper is on study that satisfy with roadbed stuffed and built to improved measure to C,D stuffing, under the condition that A,B stuffing are lack ,C,D stuffing distribute widely.The trial researches of local sample add up to 54 groups, test physical mechanics quality, according to result of experiment classified soil samples and improved tests on 13 kinds of C, D stuffing The importance of researches is as follows:Firstly, researches of meliorated tests, in design experiment, calcareousness mixed is 8% 10% 15%, cement mixed is 3% 5% 8% under conditions of different mixings, age and maintaining, changeable laws of engineering quality are researched, they are physical and mechanical quality, one of which is liquid limits, model limits, model index, dilatability, optimum moisture content, the maximum dry density; researches of mechanics include ,unconfined compression strength endurance, angle of internal friction, cohesive force, immersion strength, saturation water strength, dry and wet circle strength, permeability. In the course o f all kinds of tests for plenty of samples, we can conclude optimum mixing of calcareousness and cement, namely, optimum of calcareousness and cement is 10%, 5%.Secondly, dynamical trait test of improved soil, through dynamic triaxial test, gain critical dynamic stress, determinant train's load satisfaction with roadbed improved soil under dynamic stress , discuss the localization that under dynamic stress use computing method given by the criterion to discuss whether to meet the need of improved soil, whose localization from activity intension ratio of different improved medicament is different very much.Thirdly, improved soil changes on mechanism. Then after mixed into improved (for example calcareousness, cement), physical changes happen and improve engineering quality.At last, economic contrast analysis of meliorated soil, discuss engineering cost of unimproved, meliorated soil and different mixing of different improved stuffing.Through trials, it is feasibility and rationality that C,D stuffing improved satisfy with stuffing of roadbed or part under it. which is good reference to...