双排咬合灌注桩在河道整治工程中的应用

针对某河道现有防洪过水断面宽度不足且须预留船舶靠泊功能、地基淤泥层厚、相邻工程同时施工导致后方场地受限等特点,经比选采用双排咬合灌注桩作为河道直立段结构设计方案,施工选用硬法切割咬合工艺。工程实践表明:双排咬合灌注桩结构形式新颖,安全可靠,具有软土地基适应性好、所需施工作业面小、可陆上施工、不需要对河道断流和大范围施工开挖等特点,可供类似工程参考。

Application of double-row interlocking piles in river regulation

In view of the characteristics of a river channel including the lack of flood control cross section width,the reservation for ship berthing function,thick silt layer foundation,and limited construction area,we adopt the double-row piles structure with hard cutting and interlocking based on the comparison.The engineering practice proves that the new structural type is applicable,because it is well adaptable to the soft soil foundation and constructed on limited construction land area without river breakage and large excavation.Meanwhile,it provides a guidance for similar projects.