复杂地质条件下高速公路抗滑桩施工关键技术研究  

Analysis of Key Technology of Highway Anti-slide Pile Construction Under Complex Geological Conditions

作　　者：徐振玉 XU Zhenyu(Construction and Installation Engineering Co.,Ltd.,China Railway 18th Bureau Group,Tianjin 300308,China)

机构地区：[1]中铁十八局集团建筑安装工程有限公司,天津300308

出　　处：《浙江水利水电学院学报》2024年第6期33-39,共7页Journal of Zhejiang University of Water Resources and Electric Power

摘　　要：为探析复杂地质条件下的高速公路抗滑桩施工,结合陕西省延(长)-黄(龙)高速公路工程K26+850-K26+990段(HP26-3)滑坡实际情况,立足于滑坡稳定性分析及治理设计,对其关键技术的应用进行分析。案例工程根据对高边坡滑坡段综合分析,通过采用矩形截面抗滑桩配合石笼挡墙施工,针对不同地质采取对应开挖方式,同时严控桩孔护壁支护、钢筋绑扎及桩身浇筑等关键技术,实现在复杂地质条件下对高速公路滑坡段的有效治理。经检测,成桩质量达到了Ⅰ类桩的要求,边坡倾向水平位移值为0.02 mm/d,平均沉降速率小于0.02 mm/d,均符合规定要求,实现了对高速公路边坡滑坡的治理及有效加固,防止了边坡坍塌,可为类似工程提供借鉴。In order to explore the construction of anti-slide piles on highways under complex geological conditions,the application of key technologies was analyzed based on the stability analysis and treatment design of landslides in K26+850-K26+990(HP26-3)section of Yanchang-Huanglong Expressway Project in Shaanxi Province.According to the comprehensive analysis of the landslide section in high slope,the constructing technique of rectangular section anti-slide pile with the stone cage retaining wall is adopted,and the corresponding excavation methods are chosen according to different geology,strictly controlling the key technologies such as pile hole wall support,reinforcement binding,pile pouring,etc.,so as to realize the effective treatment of highway landslide section under complex geological conditions.After testing,the pile quality meets the requirements of ClassⅠpiles,the horizontal displacement value of slope dip is 0.02 mm/d,and the average settlement rate is less than 0.02 mm/d,all of which meet the requirements of the regulations,realizing the control and effective reinforcement of highway slope landslide from slope collapse,which can be used as a reference for similar projects.

关 键 词：复杂地质 抗滑桩 桩孔开挖 护壁支护 桩身浇筑 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]