Applied Research On Large Diameter Anchor In Deep Foundation Pit Of Soft Soil Area

Currently widely used in foundation pit in soft soil area within the retaining piles combined with support of supporting system of deep foundation pit support. With the increasing of deep foundation pit excavation, the continuous expansion of the foundation pit, to the diversity and complexity of the engineering environment of excavation engineering, the deep foundation pit support not only to ensure the safety of the supporting structure, as well as balance of economy and construction convenience. Often adopts the traditional single form of supporting structure is far cannot satisfy the need of modern engineering construction.Large diameter anchor foundation pit supporting forms, based on the soil slurry mixing, rotary spray into inclined pile, cast anchor bar at the same time, realize to the formation of active reinforcement, can use conventional foundation pit supporting in support has been cancelled, the support form can adapt to different layers, less impact on the surrounding environment, both safety and economy, and has the advantages of convenient construction and shorten the construction period.Based on the theoretical analysis, finite element numerical simulation and site construction monitoring technology, such as the large diameter anchor in deep foundation pit in soft soil area in strengthening mechanism, mechanical properties, supporting structure design parameters on the deformation characteristics and the influence of large diameter anchor supporting structure system of numerical calculation method and its application effect in the practical engineering aspects are studied, providing reference for similar engineering practice.