A GIS-based evaluation method of underground space resources for urban spatial planning: Part 2 application

Part 2 demonstrated the UUS resource evaluation methodology for Tongren city and Changzhou city in China. In Tongren, the UUS construction suitability and resource's comprehensive quality (RCQ) evaluation was implemented on an urban scale. Firstly, factors influencing the potential for UUS, including the area's landforms, engineering geology, hydrogeology, site stability, existing subsurface construction conditions, urban location, and land use were collected and analyzed based on GIS. Furthermore, a combination of AHP, MUGM and EM techniques were used in the analysis. Then the UUS construction suitability and RCQ distribution were got. The UUS layout structure was finally obtained based on RCQ distribution figure. Meanwhile, this case study shows that the area used for UUS accounts for only 2% of the effective utilization area of the whole city based on the volume estimation model. While for Changzhou, existing construction evaluation at the parcel scale was implemented for one downtown area. A “four steps” method was proposed to calculate the influence depth of building foundations based on the geographical statistical analysis module of GIS with an interpolation method. Flexible application of the method, with the addition of local project experience, can make the planners definitely determine which part of the area can be exploited. A flow chart of existing construction evaluation is finally presented.