Bracing of Foundation pit structure is the structural safety of temporary reserves are smaller, more risk. Foundation pit structure has a strong regional.

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。

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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.

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，对基坑侧壁以及周边环境采用的支挡、加固与保护等措施。

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Through the back-analysis of a computing example, the design optimization of pile-strut bracing structure of deep foundation pit is presented based on reliability analysis.

为了进行支护结构的可靠性设计，探讨了随机变量对支护结构设计的影响，并给出了进行支护结构计算的实例。

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