深竖井作为水工岩土工程中一种常见的地下工程型式,其应力变形及安全性问题受到广泛关注。依托某引调水工程,对临近水库的双筒深竖井应力变形规律展开研究分析。首先借助多种软件平台,开展交互式建模,构建能反映实际复杂条件下的双筒深竖井三维数值模型,继而分别研究了不同施工因素对双筒竖井结构应力变形的影响规律,并对不同影响因素展开参数敏感性分析。研究结果表明:地连墙分幅是双筒竖井施工过程中的最敏感因素,地连墙嵌固深度次之,施工顺序和分节开挖高度对施工的影响较小。在竖井施工过程中,尤其要注意地连墙分幅的影响。研究成果可为类似水工岩土工程的应力变形研究提供有益的参考。

[Objective] As a common form of underground structure in hydraulic geotechnical engineering, deep shafts have attracted widespread attention regarding their stress deformation and safety issues. This study takes a double-tube deep shaft near a reservoir in a water diversion project as the research subject, aiming to investigate its stress deformation characteristics and key influencing factors. [Methods] An integrated numerical modeling approach was employed, using multi-software platform interactive modeling to establish a 3D numerical model that accounted for complex geological conditions and reservoir proximity effects. Then, the influence patterns of key parameters, such as diaphragm wall segmentation, embedment depth, construction sequence, and segmented excavation height, were systematically analyzed. [Results] Diaphragm wall segmentation was identified as the most sensitive factor affecting the stress deformation of structures, with its segmentation scheme directly determining the distribution patterns of wall stress deformation. Embedment depth of the diaphragm wall ranked second in significance, while the construction sequence and segmented excavation height exhibited relatively minor effects on construction. [Conclusions] This study innovatively reveals the stress deformation mechanisms of double-tube shafts, providing crucial theoretical foundations and practical guidance for the safe construction of similar underground hydraulic engineering projects.