A nearly impervious wall or core at the base of a dam or similar structure which reduces percolation. Bentonite suspensions are used in support of deep trench excavations formed for the construction of cast-in-place concrete diaphragm walls.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。