请帮忙翻译下面一段话（土木专业的，大量分） One of the difficulties in constructing large span bridges is foundation engineering.In the construction of the lower structures of Ma Cha He bridge，the major challenges are：the design of floating drilling deck，the design and construction of cofferdams surrounding the steel sheet piles，quality control during the construction of bored piles，temperature control during large volume concrete pours and the maintenance thereafter，design calculation for the temporal scaffolding in the cast-in-situ of starting segment.This paper describes the solutions and implementation guidelines for these challenges，and provides some theoretical calculation to prove the soundness of this project.
在江中如何建桥？桥墩怎么做出来的？桥墩分为基础和墩身两大部分。只要完成基础，墩身就容易施工啦。因此基础是关键部位，其形式也多种多样：1、江水较浅，容易？
以钢板桩为例，论述围堰施工的方法，流程及施工控制要点（不少于1000字）钢板桩围堰施工方法 1、施工准备将钢板桩运到工地后，钢板桩在拼组前必须对其进行检查、丈量、分类。
