Abstract：Well-point dewater is a commonly used method to reduce underground water level in construction of deep-pit and underground structures. The steady flow theory，being a special example of unsteady flow theory，is widely used in the calculation of interferential wells. Under certain hydrogeological conditions，the interferential wells are often generalized as a hydrogeological model further to build the corresponding numerical model. Based on the steady flow theory，the model of underground hydrodynamics is proposed by using potential function and superposition theorem. The influence of all the arbitrarily arranged wells on water dropping depth and different parameters in different water-bearing layers are considered. And the corresponding theoretical formula is derived for the integrated and arbitrarily arranged interferential wells bearing pressure under water. The calculated results of practical engineering examples are in good agreement with the measured ones.
