## 3 Engineering Example
### Results and Analysis  
A partition diagram illustrating the applicability of cloud theory to building of the Xiongan New Area is shown in Figure 10. The chart shows that the majority of the above-ground regions in Xiongan New Area are appropriate and more suitable places for engineering building, with the suitable area accounting for 417.50 km\({}^{2}\), or 23.6% of the total area. This area has an excellent engineering geological environment that is suited for all types of engineering development and building, as well as general seismic fortification. 1022.89 km\({}^{2}\), or 57.8% of the total, is the area that is more appropriate. This region has better engineering geological conditions that are better suited for different engineering development and construction. Measures for liquefiable strata should be taken in accordance with standard seismic fortification. Only 8.9% of the available space, or 157.74 km\({}^{2}\), is generally appropriate. It is mostly dispersed in the areas around Baiyangdian.  
Figure 7: Cloud model of second-level index of suitability evaluation of engineering construction. (**a**) Cloud model of 0–5 m foundation bearing capacity; (**b**) cloud model of 5–10 m foundation bearing capacity; (**c**) cloud model of 10–15 m foundation bearing capacity; (**d**) cloud model of 15–30 m foundation bearing capacity; (**e**) cloud model of 30–50 m foundation bearing capacity; (**f**) cloud model of soil comprehensibility; (**g**) cloud model of shallow groundwater depth; (**h**) cloud model of corrosion of soil and water; (**i**) cloud model of land subsidence; (**j**) cloud model of sand liquefaction; (**k**) cloud model of flood inundation potential; (**l**) cloud model of seismic fortification intensity.  
Flooding is the main possibility. In addition, there are issues with sand liquefaction and land subsidence. To lessen or eliminate the risks of flooding, land subsidence, and sand liquefaction, appropriate precautions must be taken. Finally, 171.87 km\({}^{2}\)--or 9.7% of the total area--is considered to be unsuitable. It is primarily found in the north of Xiong County, in the western parts of the towns of Duancun, Longhua, and Luzhuang. The area has substantial liquefaction of sandy soil and a ground settlement rate of more than 50 mm per year.  
This research also utilizes the average comprehensive index approach as a comparison reference to confirm the viability of the cloud model in the appropriateness evaluation of engineering construction (Figure 11). According to the results of the average comprehensive index method's suitability evaluation, the suitable area is 818.65 km\({}^{2}\), or 46.3% of the total area; the more suitable area is 673.87 km\({}^{2}\), or 38.1%; the generally suitable area is 163.18 km\({}^{2}\), or 9.2%; and the area of poor suitability is 114.30 km\({}^{2}\), or 6.4%. Comparing the two methods reveals that while the assessment outcomes of the two approaches are somewhat dissimilar, the overall outcomes are rather comparable (Table 7). The main distinction is that the comprehensive index method overemphasizes the importance of a single factor's  
Figure 8: Cloud model of first level index of suitability evaluation of engineering construction. (**a**) Foundation soil condition; (**b**) hydrogeology condition; (**c**) environmental geological problem; (**d**) field stabilization.  
maximum value in the evaluation process and ignores the weight of the evaluation index, whereas the cloud model overcomes these drawbacks and more accurately quantifies the weight of all evaluation factors' effects on the suitability of engineering construction. It is clear that the cloud model may provide a more accurate and thorough reflection of the evaluation outcomes.  
Figure 10: Cloud theory suitability zone map in Xiongan New Area.  
Figure 9: Grid profile of cloud model suitability for engineering construction in Xiongan New Area.