哪位英语专业或者懂得能来帮我翻译一下下面这段文章，道路桥梁专业的专业英语翻译成中文，还会加分的！

哪位英语专业或者懂得能来帮我翻译一下下面这段文章，道路桥梁专业的专业英语翻译成中文，还会加分的！
1 Underwater tunneling .the most difficult tunneling is that undertaken at considerable  depths below a river or other boby of water .In such cases, water seeps through porous material or crevices ,subjecting the work in progress to the pressure of the water above the tunneling path.When the tunnel is driven through stiff clay, the flow of water may be small enough to be removed by pumping.Inmore porous ground,compressed air must be used to exclude water. The amount of air pressure that is needed increases as the depth of the tunnel increases below the surface.
2 A circular shield has proved to be most efficient in resisting the pressure of soft ground,so most shield-driven tunnels are circular.The shield once consisted of steel plates and angle supports,witha heavily braced diaphragm across its face.The diaphragm had a number of opening with doors so that workers could excavate material in front of the shield. In a further development,the shield was shoved forward into the silty material of a riverbed , thereby squeezing displaced material through the doors and into the tunnel,from which the muck was removed.Thecylindrical shell of the shield may extend several feet in front of the diaphragm to provide a cutting edge.A rearsection,called thetail,extends for several feet behind the body of the shield to protect workers.In large shields,an erector arm is used in the rear side of the shield to place the metal support segments along the circumference of the tunnel 3 The pressure against the forward motion of a shield may exceed 1,000 pounds per square foot (4,880kg/sq meter). Hydraulic jacks are used to overcome this pressure and advance the shield, producing a pressure of about 5,000 pounds per square foot(24,500kg/sq meter) on the outside surface of the shield.

湮的隧道。最困难的隧道就是，承担在可观的深度以下一条河或其他水的容量。在这种情况下，水渗透通过多孔材料或裂缝，主题在产品压力的水以上隧道路径。当隧道被驾穿过硬粘土，抽水的流量可小的够被消除。地面多孔，压缩空气必须习惯于排除水。空气压力的量，被需提高由于深度的隧道提高下面表面。
一个圆挡箭牌证明是了非常效能在抵制软土地基的压力，如此通告是盾构隧道。盾一旦由钢板组成，角援助，本着大量地支柱光圈横跨它的表面。光圈有许多打开门以便工人可以挖掘材料在盾牌前面。在一个进一步发展，盾牌被推向前到淤泥的一个河床的材料，从而挤泥石流通过门，进入隧道，消除粪肥。单螺纹杆机盾牌的壳可能延长几个脚在光圈前面提供一个伤口电子讨论组，一个**，呼吁只要名字，延长对几个脚背后盾牌的身体保护工人们。在大的挡箭牌中，一个起重臂被使用在后方盾牌的侧地方金属支架段沿圆周的隧道压力针对向前移动的液压千斤顶被过去常常克服这个压力和前进盾牌，生产一个压力的关于5000磅平方英尺(24500kg/平方米米)在盾牌的外表面。