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限界设计技术是保证城市轨道交通车辆安全运行,有效控制工程投资规模的关键技术之一。针对西安地铁存在穿越地裂缝的情况,在西安地铁2号线设计中,根据地裂缝的活动强度,提出“百年预留垂直位移统一按500m考虑,并根据2号线的线路变坡和全线施工方法,确定每一条地裂缝段的限界处理长度。提出了西安地铁2号线地裂缝段的建筑限界处理措施。
The boundary design technology is one of the key technologies to ensure the safe operation of urban rail transit vehicles and effectively control the project investment scale. According to the situation that Xi’an metro passes through ground fissures, in the design of Xi’an Metro Line 2, according to the activity intensity of ground fissures, it is proposed that ”a century-long reservation of vertical displacement should be unified according to 500m and change according to the line of Line 2 and the whole line construction Method to determine the length of boundary treatment for each piece of ground fissure.The construction boundary treatment measures for the fissure in Xi’an Metro Line 2 are proposed.