Determination of the Influence of the Disturbance Caused by Traversing Cross-Type Deep Foundation Pit Excavations

Accurately recognizing the influence of excavation disturbance on traversing cross-type deep foundation pit subway, determining active range disturbance, and reasonably arranging structure within its can effectively ensure safety project save resources to achieve goal sustainable development. A three-dimensional model was established using soil small strain hardening examine subway in CBD (central business district) core area Fuzhou Coastal New City, where is mainly soft with high natural water content, compressibility, weak permeability. The verified against theoretical solution Melan, deformation characteristics cross-asymmetric were analyzed. results show that, due repeated from unloading between pits, arching effect, changes boundary conditions, at intersection surrounding interact. horizontal displacement retaining surface settlement are quite different those observed a single excavation. For instance, maximum profile 1-3 Zone I decreases by 26.1%, while 1-1 II increases 20.4%, around profiles also has similar characteristics. areas be divided into positive negative effects. “disturbance zone” determined: Metro Line 6 3.5 He F1 3.0 He. Finally, groundwater level discussed.