小直径钢管灌注排桩在边坡抢险工程应用探讨

Application of small-diameter steel tube soldier piles in slope emergency works

摘要:

我国是一个多山的国家，地形复杂，地质条件多样，每年汛期地质灾害发生频繁，易诱发滑坡、崩塌、泥石流等灾害，对国民经济建设、人员安全构成了巨大威胁。由于灾害发生正值主汛期，该类边坡的处治均为抢险工程，工期要求紧。小直径钢管灌注排桩具有施工速度快、开挖量小、对边坡扰动小的优点，特别适合对工期要求紧的抢险工程。本文以西南某公路挡墙病害抢险处治工程为例，分析了边坡挡墙变形机制，通过采用小直径钢管灌注排桩的处治方案，提高了挡墙的抗倾覆能力，有效解决了挡墙基础承载力不足及大规模开挖基坑引发边坡二次滑塌等次生灾害问题，可为类似工程提供参考和借鉴。

Abstract:

China is a mountainous country with complex and diverse terrain and diverse geological conditions. Geological disasters occur frequently during the flood season each year， which is prone to induce landslides， collapses and mudslides， etc.， posing a great threat to national economic construction and personnel safety. Since the disaster occurs during the main flood season， the treatment of the slopes in such conditions is all emergency projects， and the construction period is tight. The small-diameter steel tube soldier piles， due to its characteristics of fast construction speed， small excavation amount and small disturbance to slopes， is applicable to emergency works with tight deadlines. Taking a specific project as an example， this paper analyzes the deformation mechanism of the slope retaining wall， and describes the the treatment plan with small-diameter steel tube soldier piles. The treatment increased anti-overturning ability of the retaining wall， and effectively solved the problems of insufficient bearing capacity of the retaining wall foundation and the secondary disasters such as slope collapse caused by large-scale excavation of foundation.， It can provide reference for similar projects.