Drilling geothermal

In the DOV database, any observation of soil layers is a drilling. For most drilling, a hole is made in the substrate with a drilling device to describe the various bases. A drilling gives you an image of the material in the subsoil with increasing depth. Depending on the purpose for which the drilling is placed, an appropriate drilling method will be used. This layer only shows the drillings for the purpose of ‘Geothermie’, starting from 01-01-2017. Drilling is placed for exploratory soil testing, sampling of sediment and/or groundwater, determination of soil physical parameters, environmental testing, etc. Depending on depth, type of material, and drilling below the groundwater table may be selected from several systems for drilling manually or mechanically. The soil material released may be used to establish a profile of the substrate or to take soil samples from it to carry out further analyses. The aim is often to develop a sink to extract water (see also groundwater sampling network and groundwater permits). Drilling is sometimes carried out to determine a number of geotechnical characteristics or to carry out scientific research. Superficial observations of the substrate also call drilling. In particular around 1900, a number of geologists often described the superficial layers. The database therefore contains several drilling operations with a depth of 0 metres. These are mainly road cuttings or visible lithological characteristics along the surface.在DOV数据库中，所有土壤层观测均以钻探记录（drilling）的形式呈现。对于多数钻探作业，操作人员会借助钻探设备在地层母质中开凿钻孔，以描述各类地层组分。钻探可呈现不同深度下的地下土层物质构成。需根据钻探布设的目标用途，选用适配的钻探方法。本数据图层仅展示2017年1月1日起，以地热（Geothermie）为布设目的的钻探记录。 钻探作业的布设用途包括探索性土壤测试、沉积物及/或地下水采样、土壤物理参数测定、环境检测等场景。根据钻探深度与物料类型的差异，地下水位以下的钻探作业可从多套人工或机械钻探体系中选取适配方案。钻探获取的土壤物料可用于构建地层母质剖面，或从中采集土样以开展后续分析。此类钻探的常见目标是建造取水水井（详见地下水采样网络与地下水许可相关内容）。部分钻探作业则用于测定多项岩土工程特性，或开展科学研究。 浅层地层观测也被归类为钻探记录。尤其在1900年前后，诸多地质学家常对浅层地层进行描述。因此该数据库中包含多条深度为0米的钻探记录，此类记录多为路堑剖面或地表可见的岩性特征。