人工堆筑山体变形及地基深层水平位移研究

Study on the deformation of artificial heaping mountain and the deep horizontal displacement of foundation

在城市区域大面积堆筑土方,形成人工山体,山体边坡及其地基的稳定是关注的重点。随着堆筑荷载的逐级施加,山体内剪应力及其地基内应力也随之改变,这种改变易造成边坡滑移、周边结构变形等危险。为此,在奥林匹克森林公园主山堆筑工程中,通过布设变形监测网,对山体施工过程进行实时的监测,根据反馈的变形信息调整堆筑荷载施加的速率及增量,以确保山体及地基的稳定,减小对五环路路基、周边湖体防水及护岸体系的影响。该工程的顺利实施证明通过监测网实时数据反馈以调整施工方案及进度的方法,能够有效保证堆筑工程的施工安全性。

For the large-area building earthworks to form an artificial mountain in urban areas, the stability of the mountain slopes and the mountain foundation is the attention key point. With the gradual increase of the heaping loads, the shear stresses in the mountain body and the stresses in its foundation will be changed, which easily give rise to the hazards such as the slip of the slopes and the deformation of the surrounding structure. In the heaping of the main mountain for the Olympic Forest Park of Beijing, the real-time monitoring of the mountain body during the heaping construction is carried out through the layout of the deformation monitoring network. According to the feedback information from the deformation monitoring, the loading rate and the increment of the heaping loads are adjusted to ensure the stability of the mountain body and the foundation and to reduce the influences to the roadbed of the Fifth Ring Road, the surrounding lakes waterproof and the revetment system. The successful construction of the engineering indicates that the method to adjust the construction scheme and schedules through the feedback information from the real-time monitoring could effectively ensure the construction safety of the heaping engineering.