Abstract:Yitai Plaza is a secondary and high-class business building invested and constructed by foreign investors. The building is located at the east of Yuexiu Park Station of second line of Guangzhou Metro. The construction of Yuexiu Park Station caused subsisdence distortion of Yitai Plaza followed by rupture of the interior hall floor of the Plaza and the rupture of the ground in front of the Plaza. According to the monitored data,such as water level variation,subsisdence and horizontal displacement of the building during construction,the effect of construction on subsisdence of Yitai Plaza is analyzed. A brief introduction is given for different complex water curtain construction techniques,such as pendular jet curtain and grouting curtain,to cope with different geological conditions.