浅埋隧道开挖对地表建筑物的影响

INFLUENCE OF SHALLOW TUNNEL EXCAVATION ON GROUND SURFACE BUILDINGS

应用随机介质理论,分析了桐油山连拱隧道浅埋段开挖引起的沿隧道纵横向的地表移动与变形,推导了复杂隧道开挖横断面的简化计算公式。根据中导洞开挖后的地表量测数据反分析获得地表基本移动参数,采用比例法获取隧道正洞计算所需的地表移动参数,然后对隧道正洞开挖后的地表移动和变形分布进行了预测,并据此判断隧道开挖对地表住宅楼的影响。计算结果对指导隧道的施工有一定意义。

By using stochastic medium theory, the excavation induced ground surface movement and deformation in the transverse and longitudinal direction of Tongyoushan double-arch tunnel are analyzed. And the simplified formulas for complex tunnel cross-section are derived. The fundamental surface moving parameters are obtained by using back-analysis method based on ground surface measurement data of middle cave. Furthermore, by using the scaling method, the surface moving parameters of the main tunnel can be obtained, and eventually the ground surface movement and deformation of the main tunnel due to the excavation can be predicted. According to the results, the influence of excavation on ground surface buildings is estimated, The conclusion has some significance in guiding the tunnel construction.