Damage pattern scope prediction for well point dewatering on building foundations

Abstract

In the well point construction process, it is necessary to control underground water effectively. The expected damage pattern scope within the influence radius of the depression cone of the well point can be determined according to noticeable ground and building settlement, as well as reference to the soil property changes due to the dewatering process with the aid of the formation mechanisms of underground water, based on underground water flow theory. This paper examines the Damage Pattern Scope expectation (DPS) and discusses some underground water conditions and practical key points by means of examining a laboratory pilot-scale model with light well point water lowering of different soil strata thickness, thus analysing the impact on the surrounding environment due to water lowering. The results showed that the water content and the void ratio of soil subjected to dewatering were reduced and that soil density and cohesion thus increases.