Research On Deep Excavation In Soft Soil Reinforcement In The Form Of Passive Area About Resistance To Uplift Stability

With the rapid development of national economy construction, high-rise buildings, municipal engineering, traffic engineering, water conservancy and hydropower engineering rapid development.High-rise building basement, metro, large Bridges, water conservancy and hydropower engineering of river closure cofferdam in fact will be faced with the problem of deep foundation pit engineering.With the emergence of high-rise buildings, more and more high to the requirement of foundation pit engineering, the resulting problems more and more, many high-rise building construction in the dense buildings, due to the narrow construction site, deep excavation, impossible to put slope and nearby have a permanent buildings must be protected and municipal public facilities, has a high requirement on the displacement of foundation pit stability and control.In recent years, because of the deep foundation pit, ground structures around the complex, poor soil mechanics properties of foundation pit excavation, excavation passive area reinforcement technique also arises at the historic moment.Naturally, through passive strengthening to control the stability of foundation pit uplift it became one of our research focus.Based on the soft soil deep foundation pit in wuhan as the research object, using ABAQUS finite element software analysis of soft soil foundation pit passive zone reinforce the relationship with the stability of foundation pit uplift resistance.The research results can be reference for similar engineering design.This paper mainly has the following contents:ICombination of domestic and foreign pit reinforcement of history, statistical analysis of some of the common forms of passive zone reinforcement.2, Combined with results of previous studies, the results of some of the factors affecting pit heave stability.3In soft soil foundation pit in wuhan as an example, using ABAQUS software analyzes the different ways of passive area reinforcement.4, Using ABAQUS software on soft soil foundation in soft soil mechanics parameters and the relationship between the stability of pit heave was simulated.5, Using ABAQUS software support for different pile length reinforced pit area for passive resistance to uplift affect the stability of the numerical simulation.6, Finally summarizes the analysis it is concluded that the uplift of excavation and reinforcement form can effectively control volume, soft soil parameters on the stability of foundation pit uplift resistance under different reinforcement forms the critical value, pile length little impact on the stability of foundation pit uplift resistance.Can provide reference for practical engineering.