孔内透水試験に関する二,三の考察

概要

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This paper reports on the classification for the types of the water pressure (P) versus the flow rate (Q) curves (P-Q curves) that obtained by the borehole permeability tests, and the consideration on the causes for these types. In these tests, the relation between the flow rate (Q) and the water pressure (P) is expressed in general equation as Q=KP^α therefore, the types of the P-Q curves can be classified by the value of α, as follows α=1 the normal type (N type) α>1 the increase type (I type) α<1 the decrease type (D type) The causes for these types and subdivision can be so considered as follows N type (α=1) by the laminar flow I type (α>1) I-a type by the percolation I-b type by the progressive increase of the permeable cross section. I-c type by the piping D type (α<1) D-a type by the closed fissure or the beeing impervious D-b type by the limit of apparatus D-c type by the turbulent flow
一般社団法人日本応用地質学会の論文
1977-12-30