Evaporation Measurement to map the Groundwater Discharge on a Tunnel Wall of the Low Permeable Rock Mass
Evaporation Measurement to map the Groundwater Discharge on a Tunnel Wall of the Low Permeable Rock Mass
复制标题
蒸发测量绘制低渗透岩体隧道壁上的地下水排放图
DOI：
10.5110/jjseg.30.189
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
N. Kanda
中科院分区：
文献类型：
--
作者：
Kunio Watanabe;T. Aizawa;M. Ono;Koichi Yanagisawa;H. Sakuma;Hajime Yamamoto;N. Kanda
详细的隧道围岩地下水流量图是评价岩体地下水流动的重要依据。本文作者新发展的蒸发测量技术似乎是一种精确测量低渗透岩体小流量的有效工具。采用两对湿度和温度传感器测量了近壁层流层中主要由分子扩散输送的蒸汽流量。讨论了该技术的适用性和壁面附近蒸汽流动的一些特征，即：例如，本文从理论和实验两方面研究了高渗透性裂缝的层流层厚度和蒸汽流动。实践证明，该技术具有很强的实用性。
The detailed map of the groundwater discharge on a tunnel wall must be a useful information to evaluate the groundwater flow in rock mass. A technique of the evaporation measurement that was newly developed by the present authors seems to be an effective tool to accurately measure the small value of the discharge of water coming from a low permeable rock mass. The vapor flux that is mainly transported by the molecular diffusion in the laminar flow layer formed just near the wall is measured by using two couples of humidity and temperature sensors. The applicability of the technique and some characteristic features of the vapor flow in the vicinity of the wall, i. e., the thickness of the laminar layer and the vapor flow from a high permeable fracture are theoretically as well as experimentally studied. It is found that the technique is highly practical.