大直径双排抗滑桩在某边坡应急除险加固工程中的应用

THE APPLICATION OF LARGE-DIAMETER DOUBLE ROW ANTI-SKID PILES IN THE EMERGENCY REINFORCEMENT PROJECT OF A CERTAIN SLOPE

雨季为边坡问题的高发期,年久失修的挡墙可能排水失效,在持续降雨条件下,土体中含水量骤增,侧向岩土压力增大,容易诱发边坡及支挡结构发生失稳破坏。以某工程为例,该工程因原支护结构排水失效,在雨季支挡结构及坡体产生较大变形,故发生了险情。首先通过堆载反压控制住了坡体变形,消除了险情,后期又增设双排大直径抗滑桩与原支护结构进行有效连接,保证支护结构的稳定,同时通过设置可修复式泄水孔,恢复原支护结构排水功能,减少因土体含水骤增而造成支护结构侧压力过大的问题,以进一步保证支护结构的长期安全稳定。

The rainy season is a high incidence period for slope problems.A retaining wall that has been in disrepair for a long time may have drainage failure.Under continuous rainfall conditions,the water content in the soil suddenly increases,and the lateral rock and soil pressure increases,which can easily cause instability and damage to the slope and support structure.This article takes a certain project as an example.Due to the drainage failure of the original support structure,the support structure and slope underwent significant deformation during the rainy season,resulting in a dangerous situation.Firstly,the deformation of the slope was controlled by the back pressure of the pile load,eliminating the danger.Later,double row large-diameter anti-skid piles were added to effectively connect with the original support structure,ensuring the stability of the support structure.At the same time,repairable drainage holes were set up to restore the drainage function of the original support structure,reducing excessive lateral pressure caused by sudden increase in soil moisture content,and further ensuring the long-term safety and stability of the support structure.