Analysis Of Construction Of The Impact To Urrounding Buildings Of Top-down Method On Erqi Ehua Underground Street

Dehua underground commercial street is located in zhengzhou city center,erqi memorial tower south plaza, belongs to the zhengzhou railway station businesscircle and the golden section of erqi commercial circle junction dehua, its surroundingroads is a major transportation evacuation of zhengzhou, both sides have manyshopping malls and stores, traffic, traffic is very big, complex underground pipeline,and narrow construction site, and the construction disturbance is larger. Facing thestrict construction environment,"uni-axial" construction technology not only canimprove the safety of the construction, and is suitable for closed transportation bringsmore negative effects of bustling downtown areas, and in the narrow construction site,high cost of support, use "uni-axial" technology brought about by the economicbenefits are immeasurable. For the project smoothly, ensure the construction safety isof great theoretical significance and practical application value, but also providereference for future similar projects.Earth excavation and other earth manner set forth in detail：(1) Details of the inverse approach design and construction of a number of keytechnologies, particularly in the construction and design of the building envelope,(2) combined with specific examples of projects, compared to the theoreticaldata and monitoring data analysis, the formation of a dynamic construction, to ensurethe environment around foundation settlement, horizontal displacement, settlement ofthe crest of a hill to meet the requirements.The results showed that(1)Top-down method by using beam slab structure instead of temporary support,the foundation pit excavation unloading in the soil, caused the soil mass in foundationpit pit pit weeks of relatively small mobile, which affect the earth’s surface isrelatively small.(2)Floor during the reverse construction of underground structures can play agood supporting role, which can mitigate the impact of the building on the ground.(3) Reverse construction process, the excavation pit on both sides of the building has tilted toward the trend.