复杂地形顺层软岩桩基托梁高挡墙施工技术研究

Research on construction technology of pile foundation supporting beam high retaining wall for bedding soft rock in complex terrain

复杂地形顺层软岩桩基托梁高挡墙结构包括第一桩基、第二桩基、楔形托梁、预制挡墙单元;第一桩基和第二桩基依次设置在边坡上,桩基与边坡交界处设有保护区,第二桩基顶部设有楔形托梁,渗水区设置在楔形托梁和保护区之间,楔形托梁上设有插杆,预制挡墙的楔形底端设有插孔,通过插杆安装在楔形托梁上,第一桩基顶端和预制挡墙顶部背坡面均设置带有栓孔的支座,横梁设置在第一桩基和楔形托梁之间,行车箱梁通过箱梁支座设置在横梁上,支撑杆两端分别通过高强螺栓固定在第一桩基顶端和预制挡墙顶部背坡面的支座上,卸荷板设有透水孔,设置在预制挡墙的迎坡面,反滤层设置在预制挡墙的迎坡面,然后在反滤层和边坡之间进行墙后填土,具有施工效率高、构造稳固、能防冲刷对边坡扰动小的优点。

The pile foundation joist high retaining wall structure for bedding soft rock in complex terrain includes the first pile foundation,the second pile foundation,wedge joists,and prefabricated retaining wall units.The first pile foundation and the second pile foundation are arranged on the slope in turn,the pile foundation and the slope junction are provided with a protection zone,the second pile foundation is provided with a wedge-shaped joist,and the seepage area is set between the wedge-shaped joist and the protection zone.Between,the wedge-shaped joist is provided with an inserting rod,and the wedge-shaped bottom end of the prefabricated retaining wall is equipped with a jack,which is installed on the wedge-shaped joist through an inserting rod.The top of the first pile foundation and the back slope of the prefabricated retaining wall are both set with The bolt hole support,the beam is set between the first pile foundation and the wedge-shaped joist,the driving box beam is set on the beam through the box beam support,and the two ends of the support rod are respectively fixed on the top of the first pile foundation and prefabricated by high-strength bolts On the support on the back slope surface of the top of the retaining wall,the unloading plate is provided with permeable holes,which are set on the uphill side of the prefabricated retaining wall,and the filter layer is set on the uphill side of the prefabricated retaining wall,and then on the filter layer and the side slope.Filling behind the wall between the walls has the advantages of high construction efficiency,stable structure,and small disturbance to the slope by preventing erosion.