短木桩在加固深基坑坑内反压土坡中的应用

The Application of Short Timber Pile in Consolidating the Reserved Earth Berm in Deep Excavation

摘要: 在受水浸泡情况下，悬臂双排桩支护深基坑坑内反压留坡在围护墙推力作用下极易滑塌，严重者会导致基坑严重变形，进而导致坑内工程桩偏位，甚至危及坑内施工人员的安全。短木桩以其经济和可就地取材的优点，常常被用来加固坑内反压土坡。反压土坡开挖前将短木桩打设在土坡边缘处可以起到超前加固的作用，短木桩打设后，增加了坑内被动土的抗力，增强了留土边坡的稳定性。由于木桩是预制桩，不需要养护，而且采用挖土机反铲便可快速打设，在基坑抢险加固中特别适用，可供类似工程借鉴。

Abstract: For the deep excavation retained with a double-row cantilever pile, the reserved earth berm always tends to slide when soaked, and this always leads to serious remarkable displacement of retaining wall and earth berm, and further leads to the tilt of foundation piles, and even endangers the people working on the site. With cost-effectiveness and easy availability, short timber piles are often chosen to consolidate the earth berm. Short timber piles are driven before excavation to consolidate the berm in advance, and with timber piles driven on the edge, the capability of earth berm against slide increases and becomes more stable. Because the timber piles are pre- processed, and need no other curing like concrete materials, and can be easily driven by excavators, they are suitable for dealing with the failure of retaining wall of deep excavation in case of emergency.