| With the development of urban underground space towards deepening and intensification, deep vertical shafts, as a key channel connecting the surface and deep underground space, have become a research hotspot in the field of deep vertical shaft construction due to their high efficiency, safety, and environmental advantages. Their efficient and safe construction is the prerequisite and guarantee for the development and utilization of deep underground space. Based on the design concept of sinking well type vertical shaft excavation, the system composition and technical characteristics of the domestically produced sinking well type vertical shaft excavation machine (SCJM) are systematically introduced. Taking the construction of the shield receiving well sinking well type vertical shaft excavation in the renovation and expansion project of Jiangnan Water Plant as the background, the construction technology scheme design of the shield receiving well based on SCJM is carried out, and the design parameters, overall construction process, and core excavation parameters of the sinking well type vertical shaft support are determined, and summarized the impact patterns of different water-bearing strata on construction. Engineering practice has shown that the excavation efficiency of SCJM varies significantly with the formation lithology, with the highest efficiency observed in the clayey clay layer (1.1m per day) and the lowest efficiency observed in the moderately weathered tuffaceous sandstone layer (0.12m per day); Due to the poor stability of the tunnel face, the tunneling efficiency in water-bearing strata (silt, cobbles) is reduced by more than 50% compared to that in cohesive soil; The control effect of geological disturbance is good, with a maximum settlement of 8.7mm within 15m and 15.11mm at 45m, both of which meet safety standards; Compared to the open-cut method, SCJM construction reduces the occupied area by approximately 42.3%, shortens the construction period by approximately 63.8%, and lowers the overall cost by approximately 9.86%. This fully verifies the low disturbance characteristics and efficient deformation control ability of this technology in vertical shaft construction in complex urban environments, providing useful experience and reference examples for urban deep well construction, deep underground space development equipment innovation, and construction. |
