METHOD FOR MEASURING SEEPAGE WATER QUANTITY AND SEEPAGE APPARATUS

PURPOSE:To exactly compute a seepage quantity, by forming end section chambers at both ends of a test chamber in a trench via partition walls, to keep water level in the test chamber and the end section chamber constant, and by requiring an injection water quantity in the test chamber. CONSTITUTION:Before percolation facilities for dispersing water in ground are constructed, water is injected into an injection water pipe 4 and water spray auxiliary-pipes 8 first by grasping the water permeability of the ground, and the water level in a test chamber A and both end section chambers B is kept constant. The water injected into the injection water pipe 4 infiltrates slowly into the side walls of the test chamber A via a water spray main-pipe 1. Then, by the existence of partition walls 3 and the seepage pressure of water from the end section chambers B, the water infiltrating from the test chamber A does not spread on the sides of the end section chamber B. As a result, by requiring an injection water quantity into the injection water pipe 4, a seepage quantity per trench unit length can be exactly computed.