Analysis and Prediction of Subway Tunnel Surface Subsidence Based on Internet of Things Monitoring and BP Neural Network

Table 1

Comparison of several construction methods.

Comparison indicator	Cut-and-cover method [16]	Shield method [17]	Shallow burial and underground excavation method [18]
Geology	Various strata available	Various strata available	Water-bearing formations require special treatment
Place	Occupies more road area	Takes up less road area	Takes up less road area
Section change	Good adaptability	Poor adaptability	Good adaptability
Buried position	Shallow burial	Need some depth	Shallow burial
Waterproof construction	Easier	Easy	Difficult
Subsidence	Smaller	Smaller	Larger
Traffic obstacle	Greater impact	Less affected	Less affected
Underground pipeline	Demolition and protection required	No demolition and protection required	No demolition and protection required
Construction noise	Big	Small	Small
Surface demolition	Big	Small	Small
Water treatment	Precipitation, drying	Block and drop combination	Block, drop, or block-drain combination
Schedule	Affected by demolition and relocation, and the total construction period is relatively fast	The preliminary project is complex and the total construction period is average	Fast start and slow total construction period