The construction of Guangdong-Hong Kong-MacaoGreater Bay Area is a major national development strategy of China. Shenzhen isa core city in the Greater Bay area. The karst in Shenzhen typically is found in Longgang andPingshan districts. It has brought great challenges and threats to theunderground exploitation and ground construction safety for the city. In thispaper

borehole data are first collected from karst geotechnical investigationprojects in Shenzhen and from the relevant literature. Based on the data

thespatial features of the karst in Shenzhen are statistically characterizedconsidering strata and rock type

rock stratum depth and burial type

maincorrosive indices of the groundwater

depth of the karst caves

thickness of thecave ceiling

cave height

fillings

karst line ratio

karst borehole ratio

and ground karst growth density. Results showed that the karst in Shenzhen istypically buried shallowly

but largely varies as of the spatial features.Statistically

on average the karst cave is about 20 m in depth

2.5 m to   4 m in height

and mainly half filled withsilty clays. On average the karst is about 15% for line ratio

40% for boreholeratio

and over 300 caves per km for the ground karst growthdensity. Overall

over 90% of the sites are ranked as high in karstdevelopment. It is also found that the above karst parameters follow lognormalas well as Weibull distributions. The ceiling thickness tends to be smaller asthe rock depth increases for limestone stratum

whereas these two factors arestatistically uncorrelated at a significance level of 0.05 for marble stratum.The cave height appears to be statistically independent or positively weaklycorrelated to rock depth

ceiling thickness

underground corrosive indices

andgroundwater table. The findings from this paper provide valuable prioriinformation to risk assessment on karst hazards in Shenzhen.