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Physical Characterization of a Deep Weathering Profile Over Rhyolite in Humid Tropical Peninsular Malaysia
Springer Science and Business Media LLC - Tập 36 - Trang 3793-3809 - 2018
John Kuna Raj
The weathering profile, exposed at 38.2 km of the Kuala Lumpur—Karak Highway, can be differentiated into three broad zones; the topmost Zone I (pedological soil) comprising A, B and C soil horizons and made up of clayey silty sand with indistinct relict bedrock textures. The intermediate Zone II (saprock) consists of gravelly silty sand with distinct relict bedrock texture and structures, and can ...... hiện toàn bộ
Stability of an Embankment on Soft Consolidating Soil with Vertical Drains
Springer Science and Business Media LLC - - 2016
Agrahara Krishnamoorthy, Smit Kamal
Recommendations for a Quantitative Description of Joint Orientation Data
Springer Science and Business Media LLC - Tập 37 - Trang 1503-1514 - 2018
Marie-Hélène Fillion, John Hadjigeorgiou
A comprehensive joint orientation data collection program is necessary to ensure a sufficient degree of confidence in constructing a structural model. This paper investigates the influence of the number of joints sampled on the characterisation of the joint dip and dip direction. In a series of numerical experiments, Discrete Fracture Networks (DFNs) were used to model joint set populations. The a...... hiện toàn bộ
Influence of Petrogenesis on Suitability of Some Pelitic Rocks as Construction Aggregates in South-Eastern Nigeria
Springer Science and Business Media LLC - Tập 33 - Trang 1395-1407 - 2015
Celestine O. Okogbue, Tochukwu A. S. Ugwoke
Ten rock samples, collected from five studied Albian rock quarry units, were subjected to hand specimen and X-ray diffraction studies to determine their petrography and also to two degradability test versions of soaking and drying to simulate their resistance to intra-seasonal and inter-seasonal weathering that occurs in south-eastern Nigeria. Nine of the samples, which are pelitic in composition,...... hiện toàn bộ
Cracking Problems in the Segments of Tabriz Metro Tunnel: A 3D Computational Study
Springer Science and Business Media LLC - Tập 36 - Trang 1959-1974 - 2018
Behzad Dastjerdy, Rohola Hasanpour, Hamid Chakeri
This paper presents numerical models of tunnel segments with respect to the steel rebars using a finite element method under TBM thrust jack referring to the Tabriz metro line 2. The analyses have been carried out in five different steps. Numerical modellings have been done from the lowest ratio of reinforcement (the weakest case) to the highest ratio of it (the strongest case), which means that t...... hiện toàn bộ
The characteristics of glacial tills from Northern England derived from a relational database
Springer Science and Business Media LLC - Tập 24 - Trang 973-984 - 2006
Siamak Hashemi, David B. Hughes, Barry G. Clarke
Geotechnical investigations have been carried out for many years in order to identify the depth, extent and the properties of the glacial deposits of Northern England. This valuable source of data exists in various forms because of the differences in the design of the investigations, the codes of practice relevant at the time of investigations, and contractors practice. An electronic store of thes...... hiện toàn bộ
A Parametric Analysis on the Influence of the Binder Characteristics on the Behaviour of Passive Rock Bolts with the Block Reinforcement Procedure
Springer Science and Business Media LLC - - 2020
Pierpaolo Oreste, Giovanni Spagnoli, Andrea Giuseppe Buccoleri
Effect of Inclined Clay Core on Embankment Dam Seepage and Stability Through LEM and FEM
Springer Science and Business Media LLC - Tập 38 - Trang 6571-6586 - 2020
Farzin Salmasi, Reza Norouzi, John Abraham, Bahram Nourani, Sima Samadi
Water seepage affects dam stability and loss of water from reservoirs. Consequently, seepage is an important problem in the design, implementation, and operation of embankment dams. One type of embankment dam is a non-homogeneous (zoned) dam with a clay core. Water passes through the core of the dam and loses much of its energy due to friction. Zoned embankment dams can be designed and implemented...... hiện toàn bộ
Influencing Factors of the Rebreak of the Key Rock Block of the Main Roof in the Gob
Springer Science and Business Media LLC - Tập 40 - Trang 4345-4356 - 2022
Yang Li, Yuqi Ren, Yikun Liu, Nan Wang, Xinghai Lei
In view of the phenomenon that upright triangular zone and inverted triangular zone of the collapsed roof appeared alternately in the gob, a mechanical model of the rebreak of the key rock block (KRB) of the main roof in the gob was established by using theoretical analysis. The main reason for the rebreak of KRB was revealed and the bending moment expression at any point of KRB was obtained. So, ...... hiện toàn bộ
Mechanism of the Mudstone Tunnel Failures Induced by Expansive Clay Minerals
Springer Science and Business Media LLC - Tập 35 - Trang 263-275 - 2016
Houjiang Zhang, Amoussou Coffi Adoko, Zhaojun Meng, Hao Wang, Yuyong Jiao
Expansive clay minerals can be a serious threat to underground rock structure because of their swelling behavior when absorbing water. Roof and wall collapse as well as large deformation were observed in Xiaotun Coal Mine, Guizhou Province, China. This paper studies the characteristics of expansive clays in order to understand the mechanism of the mudstone tunnel failures in the mine. The physical...... hiện toàn bộ
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