Foundation Floor Geological Mapping of a Nuclear Reactor

Harikumar, C.; Pillai, C. Sivathanu; Chetal, S.C.

doi:10.1007/s10706-010-9319-3

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…Foundation floor engineering geological mapping is essential for important civil structures to provide permanent data set for geological interpretations during construction and also it forms valuable documentation for post-construction stage (Naithani et al , 2017. For very important structure, the supporting foundation strata should be studied and documented to provide data for credible geologic interpretations (Harikumar, 2010). Shallow foundations cover such types of foundations in which load transfer is through direct bearing pressure of the bearing strata.…”

Section: Engineering Geological and Geotechnical Assessmentmentioning

confidence: 99%

Geotechnical Assessment of the Foundation of Housing Chamber of Yaragol Gravity Dam, Karnataka State, India

Naithani¹,

Singh²,

Jain³

et al. 2018

Nanosci Nanotechnol

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Geotechnical assessment of the foundation including engineering geological investigations are essential for important civil structures to provide permanent data set for geological interpretations and for recommendations of suitable engineering measures for the improvement of the foundation. Yaragol Gravity Dam for drinking water is being constructed across Markandaya river in Karnataka State of India. Engineering geological mapping on 1:200 scale was carried out for Housing Chamber of Yaragol Gravity Dam to evaluate the design basis foundation parameters. 2 m x 2 m grids were prepared for mapping of the floor. Based on the field observations and evidences, it was found that the floor area consists of foliated gneiss and granite. No evidence of faulting or shearing was observed on the surface of the floor area. Geotechnical assessment of the foundations was done on the basis of detailed engineering geological mapping and laboratory test results. Classification of rock mass using Rock Mass Rating (RMR) of Bieniawski (1989) has been attempted and based on investigations recommendations for the treatment of foundation were given. Rock type and Rock Mass Rating (RMR) methods were used for assessing the safe bearing pressure of the foundation. Consolidation grouting up to 6 m depth in the foundation using primary at 6 m spacing and secondary holes at 3 m spacing was recommended. After detailed investigations it was found that, the foundation is suitable to locate a housing chamber.

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Section: Engineering Geological and Geotechnical Assessmentmentioning

confidence: 99%

Geotechnical Assessment of the Foundation of Housing Chamber of Yaragol Gravity Dam, Karnataka State, India

Naithani¹,

Singh²,

Jain³

et al. 2018

Nanosci Nanotechnol

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show abstract

“…For very important structure like nuclear building, the supporting foundation strata should be studied and documented to provide data for credible geologic interpretations [10]. Shallow foundations cover such types of foundations in which load transfer is through direct bearing pressure of the bearing strata.…”

Section: Geological Mappingmentioning

confidence: 99%

Engineering Geological Investigations of a Nuclear Building Foundation – A Case Study from Atomic Power Project, India

Naithani¹,

Jain²,

Jain³

et al. 2017

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Engineering geological foundation investigations are essential for important civil structures to provide permanent data set for geological interpretations. At Rawatbhata, India, two units of 700 MW each Pressurized Heavy Water Reactor (PHWR) type Nuclear Reactors are being constructed adjacent to existing Rajasthan Atomic Power Project (RAPP) units 1 to 6. Engineering geological mapping on 1:100 scale was carried out for Nuclear Building-8 structures to evaluate the design basis foundation parameters. 1 m x 1 m grids were prepared for mapping of the floors and walls. Based on the field observations and evidences, it was found that the floor area consists of fine to medium grained, compact quartzitic sandstones. The floor region was seen to contain certain iron stained and fractured zone. No evidence of faulting was observed on the surface of the floor areas. However, there were some isolated patches of soft, weathered/altered rock and small fractures in the rocks. The intact rock properties at the foundation levels were evaluated considering the necessity in the overall context of the design requirements of the foundations. Geotechnical assessment of the foundations of RB-8, RAB-8 and ECCS north and south pits was done on the basis of detailed engineering geological mapping, geological drill holes logging data, rock mass permeability values, geophysical profiling and laboratory test results. Based on investigations recommendations for the treatment of foundations were given. Consolidation grouting up to 9 m depth in the foundation using primary at 6 m spacing and secondary holes at 3 m spacing was recommended. After detailed investigations it was found that, the foundation is suitable to locate a nuclear power plant.

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Engineering Geological and Geotechnical Assessment of the Foundation of Yaragol Gravity Dam – A Case Study form India

Jain¹,

Naithani²,

Singh³

et al. 2021

Journal of the Geological Society of India

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Engineering geological and geotechnical assessment of the dam foundation are essential for the design of the dam to ensure safety. At the southeastern part of Karnataka, Yaragol gravity dam is being constructed, which is designed based on site geomorphological and geological conditions and economic reasons. This paper discusses the results of the engineering geological and geotechnical investigations that have been carried out at the foundation levels of the dam. The dam foundation is composed of foliated gneiss and granite gneiss belonging to Archean to Paleoproterozoic age with intrusive dykes. This study is based on field and laboratory investigations, surface discontinuity mapping, drilled borehole data and in-situ shear testing. In-situ shear parameters of rock-rock interfaces and concrete-rock interfaces were conducted for the evaluation of dam stability against sliding. The classification and rock mass quality of the dam site is assigned using the rock mass rating (RMR) for all the 19 blocks and allowable bearing pressure (qallow) is assessed based on rock types and RMR. At all the blocks foundation, geological defects were mapped and analyzed and treated with suitable engineering measures. Based on structural features mapped, curtain grouting and consolidation grouting is recommended.

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Foundation Floor Geological Mapping of a Nuclear Reactor

Cited by 4 publications

References 7 publications

Geotechnical Assessment of the Foundation of Housing Chamber of Yaragol Gravity Dam, Karnataka State, India

Geotechnical Assessment of the Foundation of Housing Chamber of Yaragol Gravity Dam, Karnataka State, India

Engineering Geological Investigations of a Nuclear Building Foundation – A Case Study from Atomic Power Project, India

Engineering Geological and Geotechnical Assessment of the Foundation of Yaragol Gravity Dam – A Case Study form India

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