Soil fitness card — fitness for building

This map shows the suitability of the subsurface in the province of Utrecht for (traditional) construction. The term “traditional” refers to structures made of stone or concrete with a foundation on steel or piles, and infrastructure (roads) without pile foundation. The starting point for mapping is that the greater the investment in the foundation, and/or the higher the potential management costs, the less appropriate a location is considered. The card is a combination of the setting sensitivity card and the card of the minimum foundation depth. The image of the suitability card is determined in particular by the differences in the sensitivity of setting. The foundation depth map adds spatial nuances in particular in western peatlands, which are very sensitive to settling due to thick clay and peat packages. The legend of the map has a relative scale. Like ‘sensitivity’, ‘fitness’ is not to be indicated in generally applicable quantified classes. This becomes possible, however, if one method of construction is established, for which the suitability is determined. For the municipality of Vijfheerenlanden, which has been part of the province of Utrecht since 1 January 2019, no data is yet available.本地图展示了乌得勒支省（Utrecht）地下层面向（传统）建筑的适宜性。此处的“传统”指采用石材或混凝土建造、基础为钢桩或桩基的建筑，以及无桩基的基础设施（道路）。本次制图的核心原则为：地基投入成本越高，或潜在运维成本越高，则该场地的适宜性越低。本适宜性专题图由沉降敏感性专题图与最小地基深度专题图叠加组合而成。该适宜性专题图的空间格局主要由沉降敏感性的差异决定。地基深度专题图则补充了西部泥炭地的空间细节——该区域因存在厚层黏土与泥炭沉积层，对沉降极为敏感。本地图的图例采用相对分级标尺。与“敏感性”同理，“适宜性”无法通过通用量化等级进行标注。但若针对某一特定建筑施工方法明确其适宜性判定标准，则可实现量化分级。自2019年1月1日起划入乌得勒支省的费弗赫伦兰登（Vijfheerenlanden）市暂未获取相关数据。