Research And Application Of Cover Excavation Method In The Development Of Underground Space

With the development of city construction,city traffic problem has become a difficult and hot issue in our society,urban traffic has not completely is a municipal engineering problem,The most important is a multifaceted comprehensive social problem.In the next few years,the new type of urban rail transportation vehicles will along with the social progress and rapid development,at present,the development of urban rail transit in our country is still in its initial stage.How to overall consideration in the process of construction,optimize the structure,the reasonable allocation of resources,environment purification,adjust measures to local conditions,is each builder should problems to be solved.At this point,the common construction method has been difficult to meet the need of modern production and construction,as a result,uni-axial due to its wide applicability,high safety,shorten the construction period,saving construction cost and other economic and technical advantages became widespread promotion of the urban construction using one of the new method.In this paper,the cause,classification,application of uni-axial overview of principles and methods in detail,at the same time relying on changsha metro line 5 m li square station construction project as an example,this paper analyzed the in complex geological conditions,low headroom,and in the downtown of the city main road how to connect wall under the environment of inverse construction;In changsha metro line 5 m square station steel tube column construction process,improved the original construction scheme,steel liners,the cancellation of the original design without manual install locator on the uplift pile and chisel in addition to the glass;Through the analysis of soil after excavation are uni-axial after deformation and on the surrounding building,content and the effect of the real-time monitoring,and through the monitoring results show that the place even wall construction methods and improve the construction technology of steel tube column meet safety requirements,for the future similar engineering construction scheme design and optimization provides a good reference.