Data Set from Flexural, Impact, and Hydraulic Pressure Tests on Precast Concrete Geothermal Energy Piles

A dataset from the flexural, impact and hydraulic pressure tests performed on seven precast concrete driven energy pile foundations are shared publicly on this database.
Abstract: Geothermal energy pile foundations are among the most common types of energy geostructures that provide structural support and can be used as a source with ground source heat pumps for heating and cooling buildings. Energy piles can be categorized into cast-in-place and precast piles. Driven precast concrete energy piles can be installed up to the bedrock level, with higher quality, lower cost, and faster installation process compared to cast-in-place energy piles. Precast concrete driven energy pile foundations are manufactured segmentally, and the segments are connected using a suitable type of joint that provides structural integrity and allows continuity of heat exchanging pipes. An innovative and novel steel driven energy pile (DEP) joint was used to manufacture seven precast concrete driven energy piles. To assure the proper performance of the energy piles and the DEP joint, flexural, impact, and hydraulic pressure tests were performed according to the BS EN 12794 standard and the ASTM F2164-21, respectively. The impact test data includes the PDA files, which can be opened using CAPWAP® 2014 software. The data from pressure tests are summarized in a single Excel document. The data of flexural tests includes the force-displacement test data in a single Excel document and also the related digital image correlation (DIC) data, which can be opened by VIC3D 9.4.22 software. The DIC data of each experiment is compiled within a single zip file. The data of this study can be used as a reference for future research and development on driven energy pile joints.

本数据库公开共享了针对7根预制混凝土打入式能量桩基础开展抗弯、冲击及水压试验所得到的数据集。
摘要：地热能量桩基础是最常见的能量土工结构（energy geostructures）类型之一，既可提供结构支撑，也可作为地源热泵（ground source heat pumps）系统的换热热源与冷源，为建筑实现供暖与制冷功能。能量桩可分为现浇桩（cast-in-place piles）与预制桩（precast piles）两大类。打入式预制混凝土能量桩可施工至基岩层，相较于现浇能量桩，其施工质量更优、成本更低且安装效率更高。预制混凝土打入式能量桩基础采用分段预制生产，各段通过适配的接头进行连接，以保障结构整体性，并确保换热管道的连续性。本次研究采用一款创新性钢制打入式能量桩（DEP, driven energy pile）接头，制作了7根预制混凝土打入式能量桩。为验证能量桩及该DEP接头的性能，试验分别依据BS EN 12794标准与ASTM F2164-21标准开展了抗弯试验、冲击试验与水压试验。
冲击试验数据包含PDA文件，可通过CAPWAP® 2014软件打开读取。水压试验数据汇总于单个Excel文档中。抗弯试验数据包含单份Excel文档内的力-位移试验数据，以及可通过VIC3D 9.4.22软件读取的相关数字图像相关（DIC, digital image correlation）数据。每组试验的DIC数据均打包至单个zip压缩文件内。本研究数据集可作为未来打入式能量桩接头相关研发工作的参考依据。