深基坑双排桩式围护结构支护施工技术研究

Research on Supporting Construction Technology of Double-row Pile Retaining Structure of Deep Foundation Pit

双排桩式围护结构常应用于周边环境复杂且场地狭小的深基坑项目,而围护结构变形是深基坑常发的事故,因此,研究深基坑双排桩式围护结构支护施工技术尤为必要。文中设计了一种梅花式双排桩式围护结构,按照设计要求采用旋挖钻机钻进成孔,在钻孔内灌注混凝土浆液冷凝成桩,完成深基坑双排桩式围护结构支护施工。结果表明,双排桩式围护结构水平侧移最大值为15.31mm,未超过设计预警值,支护效果良好。

The double row pile retaining structure is often used in deep excavation projects with complex surrounding environments and narrow sites,and the deformation of the retaining structure is a common accident in deep excavation.Therefore,it is particularly necessary to study the construction technology of the double row pile retaining structure support for deep excavation.In the article,a plum blossom type double row pile retaining structure was designed.According to the design requirements,a rotary drilling rig was used to drill holes,and concrete slurry was poured into the holes to condense into piles,completing the support construction of the double row pile retaining structure for deep foundation pits.The construction effect shows that the maximum horizontal lateral displacement of the double row pile retaining structure is 15.31 mm,which does not exceed the design warning value,and the support effect is good.