There are over 60,000 registered cut-slopes in Hong Kong, but there are numerous slopes in natural terrain in Hong Kong. Our research efforts are divided into hazard analyses of cut-slopes and their remediation, and hazard analysis and remediation of natural terrain in terms of debris flows. Fatal cut-slope failures have been rapidly reducing in recent years. Thus, the focus has been shifted to the study and monitoring of slopes in natural terrains.
Our efforts on geohazards and mitigation relating to landslides can be classified into two main domains: (1) theoretical, experimental and numerical analyses on landslides, rockfalls and debris flows hazards; (2) Field monitoring technologies for slope monitoring. First, numerical, theoretical, experimental analyses and field studies on debris flow, slope failures, rockfall and various innovative slope stabilization methods/materials were conducted at PolyU. Secondly, GIS, GPS, IOT, fibre optic sensors and cloud computing have been employed for slope monitoring in the last few years. Commercial software “Slope 2000” and “Slope3D” were developed and approved by the Buildings Department, and have been used in many large scale/ national projects all over the world. Recently, a Collaborative Research Fund was granted by RGC for building a large scale debris flow flume.
In-place inclinometers are being installed in a slope in Baichuan, Sichuan Province, China after the Great Sichuan Earthquake.
Lateral displacements with time at different depths at the slope.