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overlie alluvium and completely decomposed granite. The rock along the Main Tunnel alignment is Shatin granite with occasional intrusions of fine to medium grained granite dykes and basalt dykes. The water table generally lies within 1 to 2 m of the existing ground level and the maximum hydrostatic pressure at the tunnel invert is around 4.2 bar.
Koor NP, Parry S, Yin J-H (2000) The shear strength of infilled and slicksided discontinuities of some Hong Kong saprolites. Eng Geol HK 2000, pp 187–192 Google Scholar Koppi AJ, Edis R, Field DJ, Geering HG, Klessa DA, Cockayne DJH (1996) Rare earth element trend and cerium-uranium-manganese associations in weathered rock from Koongarra ...
Completely decomposed granite (CDG) is abundant in Hong Kong. It has been used extensively as fill materials in various applications, such as back-filling materials for retaining structures and pavements.
Experimental study and constitutive modelling of re-compacted completely decomposed granite Author(s): Yan, Wai Man 2003 ; Effects of weathering on geological and geotechnical properties of granite and tuff in Hong Kong Author(s): Lee, Shung Kee 2001 ; Mechanical behaviour of hydraulic fill sands in Hong Kong
Influence of degree of saturation on soil nail pull-out resistance in compacted completely decomposed granite fill. Li-Jun Su, a Terence C.F. Chan, b Y.K. Shiu, b Tony Cheung, c Jian-Hua Yin a. a The Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
Numerical and experimental studies of pressure-controlled cavity expansion in completely decomposed granite soils of Hong Kong S.Y. Wanga,⇑, D.H. Chanb,1, K.C. Lamc,2, S.K.A. AUd,3 a Centre for Geotechnical and Materials Modelling, Department of Civil, Surveying and Environmental Engineering, The University of Newcastle, Callaghan, NSW 2308, Australia
The influence of wetting on the dynamic properties of completely decomposed granite in Hong Kong . Authors: Chan, Man Yiu : Issue Date: 2002: Summary: Completely decomposed granite (CDG) is a common soil, and hence a common geomaterial, in Hong Kong and many others countries around the world. In the light of the fact that the literature on its ...
The proposed SWSPS is located along Chung Kong Road, Sheung Wan, Hong Kong. The footprint area of the pumping station structures measured approximately 56m long and 43m wide, whereas the ground level is approximately +4mPD. The SWSPS is surrounded by various structures, which are sensitive to ground movement. To the north is a vertical seawall,
Confined groundwater zone and slope instability in weathered igneous rocks in Hong Kong Jiu J. Jiaoa,*, Xu-Sheng Wangb, Subhas Nandya aDepartment of Earth Sciences, the University of Hong Kong, Pokfulam Road, Hong Kong, China bSchool of Water Resources and Environment, China University of Geosciences, Beijing, China Received 17 June 2004; received in revised form 30 December 2004; .
The CDG soil is a common type of slope soils in Hong Kong. A pull-out box apparatus is designed by the author in order to perform laboratory pull-out tests, allowing a sealed condition for the pull-out test of a grouted nail on a water submerged soil with a vertical stress up to 300kPa imposed on the testing soil.
of large-diameter bored piles in Hong Kong granitic saprolites S.-C.R. Lo and K.S. Li Abstract: The skin friction of large-diameter bored piles in Hong Kong granitic saprolite manifested high variability. ... decomposed granite and increasing to 200 for highly decom-posed granite. The mass permeability is of the order of 10–5 to 10–7 m/s ...
The distance between the normal compression line and critical state line is larger for the S/F specimens than for the D/MT specimens. For residual soils like Hong Kong completely decomposed granite, which contains a significant amount of fines, it therefore seems necessary to understand the potential differences caused by different preparation ...
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Cement S Ilized Decomposed Granite ... See more Concrete and granite countertops typically cost about the same (more on prices later), but that's really where the similarities end. Concrete is basically a mix of cement and an aggregate. ... limestone that . ... Two people were killed when a school bus mounted a pavement in a crowded Hong Kong ...
To investigate the bond yield characteristics of undisturbed completely decomposed granite (CDG) which is widely distributed in Southern China, a series of conventional drained tests were conducted. From the test data, some insights are obtained as follows: for undisturbed CDG soils, the bond yield point during shearing could be identified on the curve of the normalized tangential stiffness ...
large diameter bored piles founded in hong kong decomposed granite. The use of large diameter bored pile founded in decomposed granite began in the ... Water table at ground level and the buoyant unit weight of concrete was . »More detailed
The land area of Hong Kong is 1101 km2 with a population of 6.9 million. In Hong Kong's geology, the main rock type is granite, approximately 90%. The weathering of the rock has resulted in completely decomposed granite (CDG) soil in the most land area. Therefore, the CDG is commonly encountered in most projects in Hong Kong,
Completely Decomposed Granite (CDG) is one of the most typical soils found in Hong Kong. However, limited attention has been given on the effect of fines content on its engineering properties. A series of laboratory tests was conducted to examine the effect of fines content, varying from 0 - 20%, on the engineering properties of CDG.
In his 1893 book, "Our Island – A Naturalist's Description of Hong Kong" (Figure 3) (at that time, Hong Kong consisted only of Hong Kong Island, a portion of the Kowloon Peninsula south of Boundary Street, and Stonecutter's Island), S.B.J. Skertchly recognized that granite and volcanic rocks, including feldspathic quartz porphyry, formed ...
1 1 THE PERFORMANCE OF FIBER REINFORCEMENT IN COMPLETELY 2 DECOMPOSED GRANITE 3 B.N. Madhusudhan1*, B.A. Baudet2, P.M.V. Ferreira3 and P. Sammonds4 4 1*Research Fellow, University of Southampton, UK, SO17 1BJ ; [email protected] 5 formerly, Post-doctoral Researcher, The University of Hong Kong, Hong Kong 6 2Lecturer, University College London, UK, .
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In this paper, the shearing behavior of completely decomposed granite soil and steel interfaces is examined using a modified suction-controlled direct shear apparatus. A series of direct shear tests was performed on two different types of soil-steel interfaces under different stress state variables.
Aug 28, 2008· Does 30-35 deg refer to joint sliding, or to intact but decomposed rock treated as a continuum? I know nothing of Hong Kong geology, beyond that there is a lot of granite and decomposed granite, and landslide problems. By stress ratio, you are referring to sigma1/sigma3? If so, there seems to be a mismatch between K=4 and the strength ...
Completely Decomposed Granite (CDG) is one of the most typical soils found in Hong Kong. However, limited attention has been given on the effect of fines content on its engineering properties. A series of laboratory tests was conducted to examine the effect of fines content, varying from 0 - 20%, on the engineering properties of CDG.
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