1. 当撑的解释
1. 4将复加支撑预应力的控制措施定为制度(1)在撑了第三道支撑后，对第—道、第二道轴力作检查，如预应力损失大应及时复加到设计规定的值；当撑上第五道支撑后，对第三道和第四道作险查并施加到设计规定值。
Will be added to support pre-stress as a system of control measures (1) in support of the third support after the first - that works to check the second axis, such as the loss of large prestressed rehabilitation should be added to the value of design requirements; when up on the fifth Road support after the third and the fourth for the insurance check and the value applied to the design requirements.