岩溶地质条件下倾斜硬质岩面桩基成孔施工工艺研究——以贵港西外环高速公路项目五里互通S310跨线桥为例  

Research on Hole-forming Construction Technology of Inclined Hard Rock Face Pile Foundation under Karst Geological Conditions——Taking Wuli Interchange S310 Overpass Bridge of Guigang West Outer Ring Expressway Project as an Example

作　　者：顾欢欢 Gu Huanhuan(China Railway 14th Bureau Group 5th Engineering Co.,Ltd.,Jining,Shandong 272100)

机构地区：[1]中铁十四局集团第五工程有限公司,山东济宁272100

出　　处：《工程技术研究》2022年第10期40-42,共3页Engineering and Technological Research

摘　　要：目前,在开展高速公路施工的过程中,会遇到各种各样的复杂地质情况,需要在施工前充分考虑施工成本、施工质量和施工可靠性,结合不同情况选择相对应的施工技术方案。尤其是对于部分硬质岩层和不同发育程度的岩溶时,单一的施工方法已经无法满足现场施工要求,需要充分利用现代化技术和多种施工技术,确保高速公路施工项目的顺利进行。文章以贵港西外环高速公路项目五里互通S310跨线桥为例,对岩溶地质条件下倾斜硬质岩面桩基成孔施工中遇到的重点问题进行了简单阐述,然后对应用潜孔钻+冲击钻的施工效果进行了论证。At present, in the process of expressway construction, various complex geological conditions will be encountered. It is necessary to fully consider the construction cost, construction quality and construction reliability before construction, and select the corresponding construction technical scheme in combination with different situations.Especially for some hard rock strata and karst with different development degrees, a single construction method cannot meet the requirements of site construction. Modern technology and various construction technologies need to be fully utilized to ensure the smooth progress of expressway construction projects. Taking Wuli interchange S310 overpass bridge of Guigang west outer ring expressway project as an example, this paper briefly expounds the key problems encountered in the hole-forming construction of inclined hard rock face pile foundation under karst geological conditions,and then demonstrates the construction effect of the application of down-the-hole drill + impact drill.

关 键 词：潜孔钻 冲击钻 桩基施工 岩溶 

分 类 号：U445.551[建筑科学—桥梁与隧道工程]