Design principle and method for the earth rockfill dam with longitudinal reinforcements

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    To improve the operational safety of earth rockfill dam, a longitudinal reinforcement is proposed. This rigid structure has triple functions as the seepage controlling, stress resistance and deformation resistance. Based on the classical mechanics, its anti-seepage effect, anti-deformation ability and the capacity to withstand external force is quantitatively analyzed. In addition, the quantitative relationships between the reinforcement thickness and the downstream water level, as well as the material properties of the rockfill dam are derived. For the theoretical derivation, the reinforced body is regarded as a fixed-end beam, loaded by water pressures from upstream and downstream, the active earth pressure from rockfill and the vertical drag force due to the differential settlement between core walls and rockfill. The top displacement together with the rotation angle and the bottom stress of the fixed end are derived from the deformation differential equation and validated through designing reviews. Subsequently, the construction method of buried steel pipe, which is adopted to perform the base grouting and also to meet the strength requirements, is put forward. The proposed method plays an important guiding role in rehabilitating and reinforcing the dangerous earth rockfill dams, as well as the design and construction of new dams.

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梁军.纵向增强体土石坝的设计原理与方法[J].河海大学学报(自然科学版),2018,46(2):128-133.(LIANG Jun. Design principle and method for the earth rockfill dam with longitudinal reinforcements[J]. Journal of Hohai University (Natural Sciences),2018,46(2):128-133.(in Chinese))

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  • Online: March 22,2018
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