关键词: 地铁车站, 人行通道, 类矩形顶管, 标准断面, 隧道掘进机, 顶管顶进技术

Abstract:  To realize the green and efficient construction of pedestrian passages in the underground transportation network in the urban core area, the feasibility of standardizing the construction technology of the existing underground pedestrian passages with various crosssection forms and complex construction technology is discussed. In this study, a case study is conducted on the large crosssection mined Jing′an Temple station of Shanghai metro line 14 constructed by rectangular pipe jacking method in soft soils in China, and a fullsection quasirectangular tunnel boring machine is developed on the premise of determining the crosssection design of the pedestrian passage on the station hall floor. The specific design of the cutting, shell, rectifying relay, main jacking, driving, and screw excavating systems of the quasi rectangular pipe jacking machine suitable for tunnel excavation of this section is introduced in detail. The construction technology suitable for this equipment is developed, and the main construction control measures such as foundation reinforcement, water sealing of tunnel door, construction parameter control, antifriction mud of pipe joint, control construction technology, and soil improvement are studied. The analytical results of insitu measured deformation data show that the tunnel axis should be controlled within ±50 mm, and the surface settlement should be controlled within －15.49－5.03 mm, which meets the engineering requirements and provides a standardized solution for the realization of fullsection mechanical excavation of pedestrian passages in urban rail transit construction.

Key words: metro station, pedestrian passage, quasirectangular pipe jacking, standard crosssection, tunnel boring machine, pipe jacking technology