新密电厂翻车机室沉降处理设计及施工

Treatment Design and Implementation for Dumper Room Settlement in Xinmi Power Plant

摘要:

针对新密电厂翻车机室的沉降，根据原地基处理情况，制定了压力注浆加固方案，通过试成孔确定了合理的施工设备及施工参数。针对砂砾石回填基础，采用套管跟进偏心钻头冲击钻进，很好地避免了钻进过程中的塌孔现象，保证了施工的顺利进行；间隔交叉注浆很好地保证了注浆效果。沉降观测结果显示，此次设计及施工方案是合理有效的，为类似工程的处理提供了较好的思路。

Abstract:

According to the subsidence of the dumper room in Xinmi Power Plant and the existing foundation treatment, a pressure grouting reinforcement scheme was formulated with proper construction equipment and parameters determined through the trial-hole. In order to address the gravel backfill foundation, sim-casing drilling with the eccentric bit was used to avoid hole collapse and ensure the smooth progress of construction, and alternate grouting ensured good grouting results. The subsidence observation results show that the design and construction scheme is proper and effective, providing a better idea for the treatment of similar projects.