【作者】 宋朝华；

【导师】 李欣； 邢宏；

【作者基本信息】 吉林大学 ， 建筑与土木工程， 2006， 硕士

【摘要】 基坑工程是指在地表以下开挖的一个地下空间及其配套的支护体系:而基坑支护就是为保证基坑开挖、基础施工的顺利进行及基坑周边环境的安全,对基坑侧壁及周边环境采用的支挡、加固与保护措施。基坑支护体系是临时结构,安全储备较小,具有较大风险;基坑工程具有很强的区域性,不同水文、工程地质条件下基坑工程的差异很大;基坑工程环境效应复杂,基坑开挖不仅要保证基坑本身的安全稳定,而且要有效控制基坑周围地层移动以保护周围环境。本文结合光明大厦一期工程的工程实例,根据实际情况优选合适的支护结构。本工程选择土钉墙,排桩联合支护结构形式。通过支护设计计算,确定土钉平面和剖面尺寸及分段施工高度;确定土钉直径、长度,布置方式和间距,;确定土钉注浆配方及喷射混凝土面层设计。进行土钉抗拉拔验算及内部及外部稳定性分析。通过排桩支护结构设计计算,给出桩径,桩长,配筋结果,进行桩支护的整体稳定性,抗滑移、抗隆起验算。并提出基坑支护的施工要求以及基坑监测的布置和要求。更多还原

【Abstract】 Foundation Pit is the excavation of an underground space below the surface and a coordinated support system. Bracing of foundation pit is to ensure that excavation and foundation construction for the smooth and safe environment Foundation Pit and used the pit retaining wall reinforcement and protection.Bracing of foundation pit structure is the structural safety of temporary reserves are smaller, more risk. Foundation pit structure has a strong regional.Excavation works under different hydrological and geological conditions are vastly. Environmental Effects complex excavation, excavation pit is not only necessary to ensure their own safety.But also to effectively control the pit surrounding strata.Based on the first-phase project of building a GUANGMING . According to the surrounding environment and geological conditions of the project We chose soil nail wall pile Joint Support . Soil nail wall is in the earth up to the number and intensity of soil nails pose. Soil and soil nails to give effect to greatly improve the strength of the original soil. This initiative is based on the role of soil nailing reinforcement mechanism and Slopes can change the deformation and failure modes. Significantly improve the overall stability of the slopes. The role of performance in更多还原