Introduction
The design and specification of below ground drainage often falls to a structural engineer, despite the subject typically not being the focus of their training. This apparently stems from the fact that in many instances, below
地面排水对基础设计的影响；这确实属于结构工程师的设计职责。因此，通常将排水和子结构的设计分组在一起，以确保实现某种形式的协调。
该技术指南说明了地面和污水的地面排水的基本原理。作为介绍，它描述了可用的排水管，安装方式，与结构的接口，测试和维护的方式。