【摘要】 贵州歌剧院位于高填方市政道路边坡围成的盆地内，工程建设导致开挖坡体，并产生总高30m的超限直立永久基坑边坡。根据工程需要，进行了永久支护结构的全过程优化设计，包括岩土水文参数优化、支护总体方案设计、桩锚参数化设计和坑中坑设计。优化后，在基坑开挖阶段采用桩锚临时支护；在运营阶段采用桩撑永久支护，并由剧场筒体结构支挡。设计时采用有限元法与m法相结合，确保了支护结构、建筑和市政道路的安全。实测支护桩变形与有限元计算基本吻合。更多还原

【Abstract】 Guizhou Opera is located in a basin surrounded by highfill municipal road slopes. Its construction resulted in excavation of slope and out-of-code upright permanent foundation pit slope with a total height of 30m. According to the needs of the project construction, the whole process of optimal design of longterm retaining structure was carried out, including the optimization of geotechnical and hydrological parameters, the overall support scheme design, the parameterized design of pile anchors, and the design of pit-in-pit. After optimization, pile anchors were used for temporary support during the excavation phase of the foundation pit; pile bracing was used for permanent support during the operation phase, which was beared by the shearwall tube of the theatre. The combination of the finite element method and m method in design was used to ensure the safety of the retaining structure, buildings, and municipal roads. The measured deformation of the supporting piles is basically consistent with the finite element calculation.更多还原