HX Subsidence-style Tunnel Construction Technology Discussion

In recent years, with the rapid development of our economy, national each major andmedium city the prevalence of road congestion, traffic congestion, traffic disorderphenomenon, city traffic congestion problem is increasingly serious. This is mainly due toincrease of motor vehicles, road capacity is insufficient, accelerate road network isunreasonable, traffic level of management is low cause. In order to solve city traffic problems,each big city to strengthen the basic construction of city traffic facilities, strengthen theprocessing of traffic node, on the main road intersection overpass or by open-cutsubsidence-style tunnel form, forming the ground, underground transport hub, isfundamentally solve city traffic problems.As a result of open-cut subsidence-style tunnel small occupied space, convenient traffic,less impact on the surrounding environment, the noise is small, and can meet the purpose ofcity appearance, and in each in big city gets be popularizinged energetically. But as a result ofopen-cut subsidence-style tunnel retaining structure of foundation pit, the particularity ofconstruction process complexity and by the construction of environmental conditionsinfluence, often in many technical problems encountered in the construction process. At homeand abroad to the city in the dig subsidence-style tunnel construction technology and theoryresearch is less, not more perfect and comprehensive system of construction technologysystem.Therefore, the city of open-cut subsidence-style tunnel construction process andtechnology research, summed up a set of comprehensive, safe and reliable subsidence-styletunnel construction technology and related control measures, will become the city of open-cutsubsidence-style tunnel needs to solve the realistic problem.Based on the HX subsidence-style tunnel engineering practice as the research object,according to the HX subsidence-style tunnel construction during the construction of key suchas traffic organization, construction plan; construction difficulties such as ground treatment,foundation pit support structure, the construction of foundation pit dewatering, foundation pitmonitoring, tunnel main structure construction and waterproof construction are analyzed anddiscussion, to grasp the open-cut subsidence-style tunnel construction control points, to forma set of comprehensive construction technology of sinking type.According to the research contents in the HX subsidence-style tunnel engineeringpractice, put forward about open-cut subsidence-style tunnel construction deployment,temporary traffic organization, foundation treatment, support structure, drainage of foundation pit, foundation pit monitoring, main structure and waterproof controlcomprehensive construction technology for the similar project in the future, providingmeaningful reference data.