Calculation mode of constrained pile anchor and soil nail joint support structure

Geotechnical engineering;  foundation pit support;  joint support;  Calculate the model

The pile anchor support structure mainly relies on the anchor prestressed bearing and significantly reducing the lateral shift of the pit wall, and the soil nail support mainly relies on the strengthening of the soil of the pit wall to reduce the pressure and bearing on the soil side, and organically uniting the two into a common bearing whole is a commonly used structural form in the current foundation pit support engineering. Under the action of earth pressure and ground overload on the pit wall, the pile anchor and the soil nail work together to resist the load and deformation, but the available space of the foundation pit support structure in the actual project is often limited by the site. According to the force characteristics, construction characteristics and corresponding requirements of the design code of the joint support structure of pile anchor and soil nail, considering the coordination relationship between the length of the free section of the prestressed bolt and the straight fracture surface of the soil nail, and according to the principle of total anchoring force equivalence, the design and calculation method of the restricted joint support structure is studied, which has certain theoretical guiding significance for the support and excavation of foundation pit engineering limited by site conditions.