朱晶,仲静文,徐海峰,张胤

• 1:南京新港开发公司
• 2:南京市水利规划设计院股份有限公司

摘要(Abstract)：

为保障水平定向钻穿越河道时堤防施工期的安全稳定,科学分析和评价水平定向钻埋管技术对堤防安全的影响是十分必要的。在分析水平定向钻穿越堤防工艺基础上,采用FLAC~(3D)有限差分软件,建立适用于含软土层堤防的典型计算模型,进行扩孔施工对该类堤防的扰动分析,提出管道埋深、管径、穿越位置、堤防迎水坡坡比等因素,对堤防安全稳定的敏感性分析。研究表明,随着管径的增大,导致堤防边坡的滑弧上的附加推力增大,从较大幅度的降低了堤防边坡的安全稳定性;水平定向钻埋深达到6.0 m或达到管径的约4倍时,其施工及管径的变化对堤防的影响可以忽略不计;堤防迎水坡坡比较管道埋深,对堤防稳定的影响更大。研究成果为相关水利建设提供重要技术基础和依据。

关键词(KeyWords)： 水平定向钻;软弱土层;敏感性分析;扩孔;安全系数

Abstract:

Keywords:

基金项目(Foundation): 江苏省水利科技项目(2017033)

作者(Author): 朱晶,仲静文,徐海峰,张胤

DOI: 10.13928/j.cnki.wrahe.2021.06.008

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