论文部分内容阅读
某深基坑与周边建筑物距离近,对变形要求高,设计采用了人工挖孔桩与锚索相结合的支护结构。对锚索进行了检测与监测,同时对支护结构顶部水平位移进行了监测。结果分析表明,土层预应力锚索的抗拔承载力与土层和锚固体之间的界面摩阻力有直接的关系,同时与锚索的施工质量也密切相关,其破坏模式应当是注浆体与土层接触面发生剪切破坏。监测结果表明,基坑整体稳定,桩锚支护结构对变形起到了有效的控制作用。
A deep foundation pit is close to surrounding buildings and requires high deformation. A supporting structure combining artificial digging piles with anchor cables is designed. The cable was tested and monitored, and the horizontal displacement at the top of the support structure was monitored. The results show that the bearing capacity of prestressed anchorage cable is directly related to the friction between the soil layer and the anchoring body, and is also closely related to the construction quality of the anchor cable. The failure mode should be grouting Body and soil contact surface shear failure occurs. The monitoring results show that the foundation pit is stable as a whole, and the pile-anchor supporting structure has an effective control effect on the deformation.