Study On Quality Control Of Ha-qi Passenger Dedicated Railway Roadbed And Bridge Transition Section

With the rapid development of national economy， railway construction witheach passing day. At present， China’s high-speed railway mileage has reached theworld first. Ballasted track line in the high-speed railway bridge transition sectionthe role of the special， which is to ensure that the body of the smooth transition ofthe rigid structure and subgrade stiffness， but also to reduce the rigid structures andembankment differential settlement of the major projectsmeasures. The quality of themerits of a direct reflection of the smoothness of the line， the safety of train trafficand passenger ride comfort of the train.A new high-speed railway Ha-qi passenger dedicated railway object on thequality control of roadbed and bridge transition section has been studied anddiscussed， a comprehensive analysis of Ha-qi passenger dedicated railway roadbedand bridge transition section construction of the control points， as well as measuresto ensure the control scheme.Using the literature research， field study， empirical study， interdisciplinaryapproach to Ha-qi passenger dedicated railway bridge transition section ofengineering quality control were studied. Bridge transition section is a weak link inthe construction， abutment construction and subgrade construction， lack ofcoordination， the operating space constraints， the machinery was not complete，the failure of the packing quality， foundation treatment is not in place，construction workers do not attach importance towill cause the abutment back fillcan not achieve the best control standards， making the bridge transition section ofthe disease hidden in it. Upon laying delivery operations， the transition section and the abutment differential settlement exceeds the control range to the track instructural deterioration in the formation of disease.Roadbed and bridge transition section of the influence factors of engineeringquality including homework personnel， operating machinery， filling materials，method， etc. Strict control of foundation treatment parameter criteria， thecorresponding treatment in the construction of the foundation in strict accordancewith the design and construction standards to ensure that a solid foundation； Themechanical properties of the filling material， screening test， particle sizedistribution and other indicators， should strictly control the packing does not meetthe requirements will not be allowed to use； the pros and cons of the filler will bedirectly related to the transition section at the subgrade stiffness， deformation，sedimentationand other properties； Also have a very big impact in the quality of theconstruction technology and compaction standards transition roadbed， only in theproper construction techniques and compaction indicators under the control of thestrength of the roadbed in order to achieve the best state， the transition section toplay dueeffect； Site management staffing to fully narrow due to the work surface，minicomputer， with the simultaneous construction of large-scale machinery，managers， technicians， inspectors， supervisors， etc. to do with the work.Construction technology control is Ha-qi passenger dedicated railway roadbedand bridge transition section of the key to quality control， must be transported fromconstruction preparation， mixing， paving compaction stage， detecting renovationstage to strengthen the quality control of bridge transition section. The constructionis in accordance with design requirements， abutment subgrade transition section atthe clear structure should be designed to determine the parameter index； acceptanceof the data subject does not meet the requirements should be resolutely not through.Passenger dedicated railway roadbed and bridge transition section of the qualitycontrol is a systematic project， established on the basis of the quality control and supervision of quality control as a red line， the third party quality monitoring toensure that the quality control measures of security system. Transition sectionembankment to be treated as geotechnical structures， design， construction andsupervision units co-operation， quality control of the abutment subgrade transitionsection on the level of excellence.On the view of engineering quality control to Ha-qi passenger dedicated railwayroadbed and bridge transition section was analyzed, and the quality control andresearch, to develop the quality control plan, perfect the system of quality controlmeasures, how to strengthen and improve roadbed and bridge transition sectionconstruction accumulated a certain management experience and some usefulconclusions are drawn. At the same time, also for engineering quality control ofhigh-speed railway roadbed and bridge transition better pointed out the direction.