Compressibilty and Young's modulus of filled joint
A number of the engineering structures such as tunnels, powerhouse cavern and mining shaft are constructed in the rock mass. The stability of these structures are greatly influenced by the engineering behaviour of the rock mass. For intact rock, its low deformability behaviour indicates that it i...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2005
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/8637/1/24p%20ZAIHASRA%20ABU%20TALIB.pdf |
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| Summary: | A number of the engineering structures such as tunnels, powerhouse cavern and
mining shaft are constructed in the rock mass. The stability of these structures are
greatly influenced by the engineering behaviour of the rock mass. For intact rock, its
low deformability behaviour indicates that it is a stronger material. However, the
condition changes with the presences of joint as discontinuity features in the rocks.
The presence of this joint influence the strength and deformability of rock to a great
extend. The situations become worst when intensive weathering of jointed rock mass
under tropical climate leads the formation of the filled joint. Being the weakest
component of a filled joint, filling materials contributes significantly to joint
deformability and thus reducing joint strength and stiffness. In construction work that
involving excavation in rock masses, filled joint poses a number of design and
constructional problem that may influence the stability and factor of safety to the
structure. Due to the above problems, a series of laboratory testing of physical
models, which comprised of filled and unfilled joint, was carried-out. Comparing the
stress-strain curves and Young's Modulus value has done analyses ofthe
experimental result. The result suggested that the filled joint exhibits high
deformation behaviour due to a lowest value of Young's Modulus. This behaviour
contributed by the deformation and compressibility of the infilling material and as
well as the deformation of joint blocks. |
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