Impact on buildings while the parameters of geotechnical materials change

Abstract

The cyclic rise and fall of the water level in a reservoir will destroy the rock and soil mass of the slope, cause deterioration of its material parameters, cause the uneven settlement of the building foundation and then cause structural damage of the upper building. In order to explore the rule and mechanism of structural failure of bank-slope buildings under the action of water-level cyclic fluctuation. On the basis of obtaining the parameters of the soil material after saturated water loss test and based on the finite-element interaction analysis method, the slope–building model is established by using the Ansys software program. The results indicate that with the ascending of the number of reservoir water lifting and lowering cycles, the differential settlement of the bank-slope foundation begins to aggravate. Although the growth rate slows down after five cycles, it does not stop. This shows that the mechanical damage caused by reservoir water fluctuation to the soil materials of the slope is a cumulative process and continues to increase the uneven settlement of the superstructures. The maximum horizontal displacement of prefabricated buildings increases by 2.3 times under the action of reservoir water lifting.