Around the UK, many coastal harbours have reduced in importance and/or lost the original sources of income against which to defray maintenance or refurbishment. Their breakwaters may however still protect harbour-side properties against wave overtopping, and thus flooding. This paper presents results from an exploratory study to identify how blockwork breakwaters common in many smaller UK coastal harbours may collapse due to storm action, and in this paper, how much wave protection is given by collapsed breakwaters. The companion paper by Pearson & Allsop (2017) describes initial work to estimate the failure of blockwork walls, and presents results of wall collapse tests.

中文翻译：

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孤儿防波堤–当它们倒塌时会得到什么保护？

在英国各地，许多沿海港口的重要性降低和/或失去了用于维护或翻新的原始收入来源。然而，它们的防波堤仍可保护海港的财产免受海浪的破坏，从而防止洪水泛滥。本文提出了一项探索性研究的结果，以确定在英国许多较小的沿海港口常见的阻塞式防波堤如何由于风暴作用而倒塌，并且在本文中，倒塌的防波堤能提供多少波浪保护。Pearson＆Allsop（2017）的伴随论文描述了估计砌体墙破坏的初步工作，并提出了墙体坍塌测试的结果。