Research On The Sedimentation Mechanism And Control Method For High Embankment Of Collapsible Loess

Among current highway and railway design specifications ,There have not requested calculating subside to general embankment, guaranteeing the degree of compaction, controlling the solidity of pressing that the subsiding amount of the embankment reaches the request, but as to wet loess area high embankment of falling into etc. , fill out soil heavy to conduct oneself with dignity pressure, it is keep solidity is produced by it to subside , can to highway with drive a vehicle adverse effect of leading to the fact road surface too to control strictly; To this kind of question of subsiding , need to put forward a method that control subsides.Wet person who fall into loess embankment subside out of shape to is it fill embankment subside , loess out of shape compression of ground of oneself to include, and loess ground wet to fall into out of shape, to wet structure characteristic of loess of falling into etc. this text, on the basis of summarizing the wet falling into loess theory research results of the past, through is it build 6 section experimental study that stress meet an emergency of highway section to fill out to under construction Lanzhou to Lintao , Lanzhou to sea stone gulf 3 of expressway with high embankment, survey wet person who fall into tall embankment of loess fill out the keeping the stress , meeting an emergency value in the body of soil, know high embankment stress , distribution characteristic that meet an emergency and subside the law out of shape tentatively; Through to the analysis and research of the test data , have set up the equation of fitting of development with time of meeting an emergency, draw person who subside fill out soil conclusion in the 0.25-0.3% of the ranges of height in embankment after the workerThrough falling into the analysis of mechanism to the loess wetly , find that the wet falling into size of loess relates to function pressure and initial water content , when is it use pressure to be heavy to certain extent to regard asing, loess enter water wet person who fall into reduce or disappeared after oozing. So has put forward and controlled the loess ground and fallen into the method to subside wetly through the operational procedure .Meanwhile, through test to wet ,find out wet loess deforming and it's time's relation being of logarithm , established wet loess soil stress, met an emergency and a literary composition of time concern models, probe into wet person who fall into loess high embankment oneself subside and subside computing technology of quantity after the worker, result of calculation and basically unanimous to survey data, It offered theoretical foundation to loess high embankment control of getting out of to subside for wet person who fall into.The high press method be application at LanHai high way, analyzed the utilities ,and researched the theory,design method,technique of loess high press. It is useful to wet soft loess basement construction control.