8.1.1 The cofferdam construction shall meet the requirements ofconstruction progress and flood protection during flood season. Forthe construction design of cofferdam, the construction progress,technique, sequence, method, the allocation of constructionma...[继续阅读]

    7.2.1 The measures of seepage control for cofferdam foundationoverburden shall be reliable in seepage control and convenient inconstruction.7.2.2 The blanket seepage control should be utilized when thefollowing factors are all possessed.(1) The retaining ...[继续阅读]

    8.2.1 The dismantling design of cofferdam shall conform to thefollowing requirements, upon which the dismantling scope andtiming shall be determined.(1) It shall not affect the normal operation of permanent buildings.(2) It shall meet the requirements of ...[继续阅读]

    7.3.1 The protective measures for cofferdam foot of water-side facein overburden of earth-rockfill cofferdam foundation shall bedetermined based on the hydraulics conditions of foot area anderosion resistance of overburden. The protective materials, which...[继续阅读]

    1.0.1 This standard is drafted specifically to specify and guide thedesign of cofferdam of hydropower project and guarantee the qualityof design.1.0.2 This standard stipulates principles, methods and requirementsof design for the cofferdam of hydropower p...[继续阅读]

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    6.6.1 The cofferdam body structure of earth-rockfill cofferdamshall conform to the following provisions.(1) The compaction index of cofferdam body above water surface forthe earth-rockfill cofferdam of Grade 3 may be taken based onDL/T 5395. The compactio...[继续阅读]

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    3.1.1 Hydrological and meteorological conditions(1) The data of measured discharge, water level and water surfacegradient of river in dam site area in flood and dry periods.(2) The calculated value of maximum annual discharge and designflood hydrograph of...[继续阅读]

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