Civil Engineering Department The University of Hong Kong Hong Kong China;
Civil Engineering Department The University of Hong Kong Hong Kong China;
Key Laboratory of Engineering Geomechanics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China;
Key Laboratory of Engineering Geomechanics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China;
Key Laboratory of Engineering Geomechanics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China;
Key Laboratory of Engineering Geomechanics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China;
rock cavern; grotto; Longyou; argillaceous siltstone; crack; water; environment; self-healing;