ABSTRACT
Deep excavations often cause notable deformations of surroundings in soft soil area. The new Shanghai Children’s Library project is introduced in this paper to elaborate the general design and construction measures of deep excavations encircled by complicated surroundings in Shanghai soft ground. In consideration of the shape and the scale of the excavation as well as its unfavorable environment and geology condition, ground improvement, waterproof curtain, retaining walls and struts were adopted to control the displacements of the excavation and its surroundings. The construction sequences such as supporting before excavating block by block and from east to west were carefully arranged and well executed. Field data during excavation and construction is presented to illustrate the performances of retaining walls and the existing surroundings such as bridge, underground pipelines, pump station and embankment, which demonstrates the reliability of the design and construction measures.
