关键词: 隧道工程, 盾构隧道, 框架建筑物, 浅基础, 沉降, 内力

Abstract: Shield tunneling in soft soil may disturb surrounding soils, thus causing the deformation and additional stress of adjacent buildings. Internal force changes and the deformation due to settlement of adjacent buildings on shallow foundation caused by shiled tunneling were studied and researched based on the ground loss theory .Then, a mechanical model showing the synergistic action of structure, foundation and ground of the building was established with its analyic solution deducted as well. Combined with deformation values measured, the theoretical and measured values coincided well. The research shows that in the region of shield tunneling, shallowly founded structures tend to tilt wholely. The shearing force and bending moment in foundation beams of frame structures increased with the approaching of the working face and their peak values appear when the working face arrived right under the bottom of the building. Meanwhile, in order to make sure that the impact of shield tunneling on adjacent framework structure on shallow foundations can be better controlled, the settlement difference at head and rear of the building and its inclination rate shall be monitored more closely and this way.

Key words: tunnel engineering, shield tunnel, frame building, shallow foundation, settlement, internal force