Study on Deep and Large Foundation Pit of a National First-Class Key Tomb Protection Project

Table 1

Comparison of building protection standards.

Monitoring items	Building foundation pit monitoring technical specifications (GB50497—2009)	Shanghai standard: code for construction monitoring of foundation pit engineering (DG/TJ08—2001—2006)	Monitoring alarm value in report and suggestions on cultural relics of Jun temple	Recommended design value
Building settlement	Settlement value 10∼60 mm	Settlement value, 10∼60 mm; Change rate, 1∼3 mm/d	Settlement value, 15 mm; Change rate, 1.5 mm/d	Settlement value, 10 mm; Change rate, 1.5 mm/d