ABSTRACT
With the Urbanization developing, the land using of Urban Construction is getting intensive in China. New building constructed close to existing buildings is becoming more and more common. Such construction is known as “adjacent construction”. For Core region in big cities, the adjacent construction has been normalized. Many foundation pit engineering is very close to the existing urban public facilities. For bridge, the structure which extremely sensitive to environmental influences, adjacent construction would cause bridge pier generating transfinite settlement and tilt easily. In addition, adjacent construction would increases the displacement of foundation pit retaining wall and even cause the foundation pit accident. In recent years, adjacent construction accidents emerge in endlessly: In Hangzhou, a foundation pit supporting broken near intersection of Wenyi west road and Huajiang road cause surrounding building tilt, as is shown in Figure 1; In Wuhan, Hubei province, a foundation pit excavated over 10 m depth cause an abnormal subsidence of Huyue bridge piers, the maximum reached 16.98 mm; In Lanzhou,
provided safety practical measures to make sure security of adjacent excavation.
