Engineering behavior of coral reef calcareous rock in East Java, Indonesia
Coral reef calcareous rock, deposits in neritic environment, is widespread in tropical ocean area.It possesses special structure and engineering characteristics due to the sedimentary environment and short depositional history.This paper, on the basis of an actual project in East Java, discusses the basic engineering properties of coral reef rock.By way of electronic microscope scanning and mineral analysis, the results indicate that weak diagenesis of calcareous rock results in its large porosity and loose structure and, further, controls the mechanics behavior of the rock.Moreover, indoor tests and in-situ tests also show that the rock is the very soft type: its SPT blow count presents the feature of non-normal distribution with wide range of fluctuation.Besides, shear wave travels in reef rock much more slowly than it does in ordinary rocks, and the ratio of elastic wave speed and shear wave speed close to 2.0, all the phenomena showing the typical loose structure of this rock.Given plenty pores, water pressure test in borehole suggests high permeability and good connectivity of the calcareous rock, and its hydrogeological characteristics also differ greatly from that of other rocks.
G.Y.Tang Z.H.Liu J.G.Zheng
China JK Institute of Engineering Investigation and Design, Xian, Shaanxi, China
国际会议
The 3rd ISRM Young Scholars Symposium on Rock Mechanics(第三届国际岩石力学青年学者论坛)
北京
英文
107-111
2014-11-08（万方平台首次上网日期，不代表论文的发表时间）