Reducing the risk of structural damage due to earthquake-induced liquefaction in new and existing buildings is a challenging problem in geotechnical engineering. Drainage countermeasure techniques against liquefaction have been studied over the last decades with an emphasis on the use of vertical drains. This technique aims to allow a rapid dissipation of excess pore pressures generated in the soil during the earthquake thereby limiting the peak excess pore pressures and consequently improve the structural response. Rapid drainage in the post-earthquake period in the presence of these drains helps quick recovery of the soil strength. Recent studies propose different variations in the vertical drains arrangement to improve the excess pore pressure redistribution in the soil around structures. However, conventional arrangements for existing buildings do not achieve an adequate proximity from the drains to the soil below the foundation. To address this, the performance of inclined and vertical perimeter drain arrangements are studied in this paper. Dynamic centrifuge tests were carried out for the different arrangements in order to evaluate the excess pore pressure generation due to ground shaking and the following dissipation together with the foundation settlement and dynamic response.

中文翻译：

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倾斜周边排水性能作为现有建筑物下方的液化对策技术

降低新建筑物和现有建筑物因地震引起的液化造成的结构损坏风险是岩土工程中的一个具有挑战性的问题。在过去的几十年里，人们一直在研究对抗液化的排水对策技术，重点是使用垂直排水管。该技术旨在使地震期间土壤中产生的超孔压快速消散，从而限制峰值超孔压，从而改善结构响应。在这些排水管的存在下，地震后时期的快速排水有助于快速恢复土壤强度。最近的研究提出了垂直排水管布置的不同变化，以改善结构周围土壤中的超孔隙压力重新分布。然而，现有建筑物的常规布置无法实现从排水管到地基下方土壤的足够接近度。为了解决这个问题，本文研究了倾斜和垂直周边排水装置的性能。对不同的布置进行了动态离心试验，以评估由于地面震动和随后的消散而产生的超孔隙压力以及地基沉降和动力响应。