Subgrade Settlement Observation Data Processing And Forecast Model Research

The settling time sequence forecast method are very many, mainly divides into two big kinds, one is the soil mechanics theory method, another is for the basis actual material calculation subsidence quantity and time relations forecast method. Are very many as a result of the influence subsidence factor, but each factor the influence displays to the subsidence in the subsidence data, therefore the second kind of method obtained the widespread application.The grey systems theory method is in particular excavates the system interior through data itself the rule, obtains the forecast night-watch for is reasonable. This article the question which existed in the forecast has carried on the discussion on the grey systems theory method.When grey systematic theory at present set up GM (1,1),it assumes that fit curve passes the first point of modeling data to confirm the integral constant, thus obtained to forecast formula. But as time goes on, the amount of information included of the first point of modeling data has been already insufficient. This text will confirm the constant method of integral divides into three kinds of schemes:â‘ Pass the first point of modeling data;â‘¡Pass the last point of modeling data;â‘¢Pass the point of modeling data of smallest with the error. This text forecast 6 steps to 24 group data and compare of the result, have put forward it according to the method of choosing the scheme of curve type of the modeling data. Has carried on smoothness examination in the forecast to 24 groups of data, regarding does not satisfy smoothness condition 3 groups of data to use the accumulation to subside establishes the gray system forecast model, the forecast effect remarkable enhancement.At present, on aspect of which the settlement observation data treatment,the method of which arrangement the settlement observation data is passing artificial collection.Then using Excel installation software establishment the related table which to management the plenty of data.And using the artificial method to statistical and analysis the data.At the same time,based on the two dimension situation,drawing each observation dots real-time settlement curves,which to reflect practical process.This research method existing some disadvantages:â‘ operation tedious;â‘¡heavy workload;â‘¢not beneficial settlement data query and statistical;â‘£not beneficial reflect the whole subgrade distortion and settlement spatial distribution status. This research focusing on Shao Yang to Huai Hua highway settlement observation data,establish the access database.Using VB embedded technology,regard MapInfo as a object to use, and regard it embedded into application, realize graphic query interface andsettlement data management system combination,set up subgrade settlement data management system which based on the message comprehensive accurate,interface friendly,simplified operation.Convenience road planning, management department timely and accurately master jurisdiction owning subgrade settlement message,made daily management and decision become more scientific.