求翻译：[摘要] 本文以马钢大H型钢厂轧后冷却项目回水池工程为实例，介绍了如何在周边环境复杂，无法放坡开挖的情况下，利用结构自身强度以及与土体的摩擦力逆作法施工，进行土方直立开挖，并取得了良好的经济效果，可在工程实践中参考应用。是什么意思？

[Summary] this article of Ma steel h-beam factory cooling projects after rolling back to the pool project for example, describes how the environment around the complex, could not be cases of slope excavation, using the structure of the soil and its strength and friction reverse construction, earthwork excavation of vertical, and has achieved good economic results, application reference in engineering practice.