In this paper, structural and ground behaviours of several excavations in Kaohsiung, Taiwan were described and examined. Based on behaviours observed from these excavations, it was found that the maximum lateral wall displacement (δhmax) in relation to the maximum excavation depth (He) is approximately 0.034 to 0.3%. The ratio of maximum surface settlement (δvmax) to δhmax varies from 0.5 to 0.7 for the excavation constructed by bottom-up method and from 1.3 to 1.8 for the excavation using a semi-top-down method.The zone at ground level affected by the excavation is up to 3 times the maximum excavation depth behind the diaphragm wall which retains the earth during construction. This finding is different from previous conclusions reported by Clough & O’Rourke. It is apparent that chemical churning pile does not effectively reduce influences of the excavation on adjacent buildings.