Sichuan Province Niri River Kaijianqiao Hydropower Station Project The Structure Stability Analyse And Optimization Research About Surge Shaft Surrounding Rock And Timbering

Hydropower station of surge shaft is a familiar building, surge shaft is a key part of hydropower station, and has huge volume and complicate load and boundary condition, which is embedded in the rock mass, so it belongs to underground structure. On the guide of two theory of underground structure analysis: load structure method and layer structure method, structural mechanics and 3-D finite element method can be used in the analysis of surge shaft. In the structural mechanics method, elastic thin wall column shell and thin slab theory is used in the computation, and consider two rigid conjunctions, adopt underground frame bending moment allotment method to admeasure the wall of a well and the scaleboard bending moment. This kind of calculation method led to go into a more simplification and suppose, can't consider silo special type of figure and underground structure lotus of the structure to carry etc. factor of partial variety circumstance, consider shortage to the loading ability of surrounding rock. Adjust space of pressing the well to be subjected to a dint circumstance for the sake of the accurate reflection, adopt a 3D FEM to carry on a calculation dont lose to a kind of valid method. But the FEM calculation involve rock mass, anchor pole, jet concrete, reinforced concrete etc. the emulation of various space structure and construction process, meet a lot of difficulties in actually the usage. Therefore, the analysis which makes surge shaft to carry on the space FEM sets up a mold research, the study surge shaft each part of structure to be subjected to dint appearance, thus excellent turn to adjust a structure design of surge shaft to seem to be very important.This text with Kaijianqiao Hydropower station in Sichuan province Niri river to adjust to surge shaft for object, the method calculation which investigates and studies to use a 3D FEM surge shaft to set up a mold method, discussed stress distributing circs and transmutation rule during the period of excavating surge shaft, and spray concrete, hang a net to spray concrete, different anchor pole to protect...etc. under circumstance, the surge shaft surrounding rock stabilitys that is under work condition, the verification surrounding rock Timbering rationality which protects a design, providing excellent turn to protect parameter. The outside water function which infiltrates outside the internal water to cause descends to surge shaft lining structural stability, dissimilarity lining thickness, dissimilarity to prop up beam to cut noodles size, dissimilarity to prop up beam to line up number and number to carry on stability analysis under the different...