浅谈麻栗坝水库城子渡槽工程基础处理措施及效果

On foundation treatment measures and effects of Maliba Reservoir Chengzi Aqueduct Project

麻栗坝水库城子渡槽沿线大部分地段为淤泥质软土层,承载力低,压缩变形大,基础持力层埋藏较深,地下水位高,基坑开挖排水容易产生明显的渗流破坏,导致地基承载力不能满足设计要求。为解决基础承载力问题,该工程采用钢筋混凝土灌注桩对基础进行加固处理。本文主要介绍了麻栗坝水库城子渡槽工程基础地质条件、跨河拱重力墩及排架承台基础处理措施和效果,可为类似地质条件的工程提供参考。

Most sections along Maliba Reservoir Chengzi Aqueduct belong to silt soft soil layer,which is characterized by low bearing capacity,high compression deformation,deeper buried depth of foundation bearing layer and high underground water level. Drainage of foundation pit excavation can easily produce obvious seepage damage,and therefore foundation bearing capacity cannot meet the design requirements. Reinforced concrete cast-in-place pile is adopted in the project for foundation reinforcement treatment in order to solve the problem of foundation bearing capacity. In the paper,foundation geological conditions,arch gravity pier across a river as well as bent cap foundation treatment measures and effects in Maliba Reservoir Chengzi Aqueduct Project are mainly introduced,thereby providing reference for projects with similar geological conditions.