The pipe section of the immersed tunnel is the large-volume concrete structure, which is complicated in the structure shape.
沉管隧道工程中的管段为大体积混凝土构件，结构形式较为复杂。
2
The justification for treating a fluid as a continuum. depends on the physical dimensions of the body immersed in the fluid and on the number of molecules in a given volume.