外文文献翻译,有没有好心英语好的网友帮忙翻下

外文文献翻译,有没有好心英语好的网友帮忙翻下
Calculation Model
The pressure relief valves in the steel liner have to drain the
seepage flow from the rock mass in such a way that the
external water pressure does not exceed the tolerable value
for a certain steel liner thickness. Assuming radially symmetric permeability conditions, the discharge through the
pressure relief valves is influenced by the head losses of the
seepage flow across the following zones (Fig.4):
• Rock mass
• Grouted or loosened rock zone around the pressure
shaft or tunnel (if present)
• Backfill concrete (non-reinforced, cracked)
• Gap between steel liner and backfill concrete (opening
depends on external water pressure)
• Pressure relief valves.
Since the opening of the gap between the steel liner and
the backfill concrete depends on the external water
pressure, a mechanical–hydraulical coupled system is
obtained, which has to be solved using an iterative
approach.
3.2 Seepage Flow Through the Rock Mass
Assuming a groundwater level which is located above the
tunnel and almost parallel to its axis, the seepage flow
through the rock mass towards the tunnel is shown in Fig. 5
and can be estimated as follows for isotropic rock mass
permeability (Rat1973; Schleiss 1985, 1986):

计算模型
在钢衬的泄压阀有排水
渗流与岩体在这样一种方式
外部水压力不超过允许值
一段钢衬厚度.径向对称性假设的条件下,放电通过
泄压阀的水头损失的影响
在下列区域渗流（图）：
•岩体
•灌浆或松动区周围的压力
轴或隧道（如果存在的话）
•回填混凝土（无筋,破解）
•钢衬回填混凝土之间的差距（开放
依靠外部水压力）
•泄压阀.
的钢衬和之间的差距开幕以来
回填混凝土依赖于外部的水
压力,机械–水力学耦合系统
得到的,这是使用一个迭代求解
方法.
3.2通过岩体渗流
假设一个地下水位位于上方的
隧道几乎平行于轴,渗流
通过对隧道围岩在图5所示
可估计为各向同性岩体
渗透（rat1973 schleiss；1985,1986）：