Strength Parameters of Cement Borehole Seals in Rock

1996-01-01
Sealing of penetrations (e.g. boreholes, shafts, mine drifts and tunnels) may be required for a variety of reasons. Penetrations of and near a high-level nuclear waste repository need to be sealed reliably to retard any radionuclide migration to the accessible environment (US Nuclear Regulatory Commission, 1983, 1985). Design of seals may also be required in (1) water dams, barriers, water wells, mine drifts or shafts, to prevent flooding of underground operations (e.g. Garrett and Campbell Pitt, 1961; Loof-bourow, 1973), (2) diversion tunnels for the construction of hydroelectric power plants (e.g. Mitchell, 1982; Kinstler, 1983; Moller et al., 1983; Pett-man, 1984), (3) mine openings in order to control mine effluents (e.g. Mining Waste Study Team 1988; Einarson and Abel, 1990), (4) oil, gas and chemical disposal wells (e.g. Smith, 1976; Calvert, 1980; Halliburton Services, undated), and (5) blasthole stemming studies (e.g., Konya, Otounye and Skidmore, 1982; Otuonye, Konya and Skidmore, 1983).

Suggestions

Composite shear stud strength at early concrete ages
Topkaya, Cem; Williamson, EB (American Society of Civil Engineers (ASCE), 2004-06-01)
Composite action between a reinforced concrete deck and steel girders is usually achieved by making use of welded headed shear studs. The mechanics of shear studs embedded in mature concrete has been investigated extensively in the past. Current literature, however, lacks experimental evidence of steel-concrete interface behavior at early concrete ages. This information is useful in understanding the behavior of bridges during construction. Current testing methods are not suitable for determining the respon...
Damage detection in structures using vibration measurements
Aydoğan, Mustafa Özgür; Özgüven, Hasan Nevzat; Department of Mechanical Engineering (2003)
Cracks often exist in structural members that are exposed to repeated loading, which will certainly lower the structural integrity. A crack on a structural member introduces a local flexibility which is a function of the crack depth and location. This may cause nonlinear dynamic response of the structure. In this thesis, a new method is suggested to detect and locate a crack in a structural component. The method is based on the fact that nonlinear response of a structure with a crack will be a function of t...
Performance Evaluation of Internal Drains of Earthen Dams
Çalamak, Melih; Yanmaz, Ali Melih (American Society of Civil Engineers (ASCE), 2018-12-01)
Seepage is always expected in earthen dams because they are made of porous materials. However, it should be always under control and its amount and pore-water pressures should be kept below acceptable limits. This can be satisfied by installing internal drains. This study reviews the characteristics of blanket, chimney, and toe drains and assesses their suitability and effectiveness for various material types and geometric characteristics in separate cases. Numerical simulations are conducted for steady-sta...
Evaluation of twin tunnel-induced surface ground deformation by empirical and numerical analyses (NATM part of Eurasia tunnel, Turkey)
Agbay, Ebru; Topal, Tamer (2020-03-01)
Pre-support systems are very important for inner-city shallow tunnels in order to minimize twin tunnel-induced surface deformations. However, previous studies concerning the assessment of the magnitude of surface displacements caused by twin tunneling have not considered the effects of a pre-support system and stress release by deformation. The aim of this study is to introduce a procedure for obtaining modification factor including the effects of a pre-support system and the rock mass quality that can be u...
Stiffness requirements for wind girders in open-top cylindrical steel tanks
Zeybek, Özer; Topkaya, Cem (2022-07-01)
© 2022 Elsevier LtdAboveground cylindrical storage tanks are very thin shell structures which are prone to buckling when subjected to wind pressure. Both external and internal pressures are developed due to wind action, and the magnitudes of the pressures generally vary around the circumference. A wind girder is generally used in open-top cylindrical tanks to increase their resistance against buckling. The wind girder must have adequate strength and stiffness in order to fulfill its function properly. Widel...
Citation Formats
H. Akgün, Strength Parameters of Cement Borehole Seals in Rock. 1996, p. 39.