深基坑施工挖孔桩冠梁防护体系的设计与验算

指出北营陡河1号特大桥37号墩基坑开挖较深,作业面小,施工难度大,边坡稳定性差,为防止因基坑开挖给银联线和津山线路基造成不利影响,应用挖孔桩冠梁结构防护体系对基坑边坡进行防护,取得了理想的效果。结合工程实践,介绍了挖孔桩冠梁结构防护体系的设计和验算。

Design and checking of dug pile top beam protection system of deep foundation construction

It points out the construction of the No.37 pier foundtion of Beiying No.1 Douhe super large Bridge has great difficulty because of its great depth,small operating surface and instable slope.The dug pile top beam structure was adopted in the foundation construction to protect Yin-Lian railway and Jin-Shan railway from adverse impact.Through the application of digged-hole pile structural protecting system on the maintenance of foundation side slope,the desirable effect has been achieved.Combining with project practice,the design and checking of the dug pile top beam structure were introduced in detail in this paper.