一种固结桩式薄板丁坝及其桩体的抗倾覆能力  

A flashboard spur dike with consolidation pile and its anti-overturning ability

作　　者：廖艺康 李富春 黄本胜 张民曦 喻国良[1] LIAO Yikang;LI Fuchun;HUANG Bensheng;ZHANG Minxi;YU Guoliang(School of Naval Architecture,Ocean&Civil Engineering,Shanghai Jiaotong University,Shanghai 200240,China;Guangzhou Nansha Engineering Company of CCCC Fourth Harbor Engineering Co.,Ltd.,Guangzhou 511455,China;Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510635,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]中交四航局广州南沙工程有限公司,广东广州511455 [3]广东省水利水电研究院,广东广州510635

出　　处：《水利水电科技进展》2021年第2期82-88,共7页Advances in Science and Technology of Water Resources

基　　金：国家重点研发计划(2016YFC0402607)。

摘　　要：介绍一种新型且经济的、带固结桩的预制插板丁坝,其固结桩是该丁坝的主要抗倾覆构件。通过室内试验和三维扫描技术,在细砂基床上开展了固结桩的抗倾覆性能研究。结果表明:固化剂与土体反应后在桩周形成“脚靴”状固结体,显著提高了桩的抗倾覆力;固结桩的倾覆过程分为微偏阶段、倾斜阶段、倾覆阶段和拔移阶段;固结桩抗倾覆力主要受桩体几何形状、埋深、土体性质、固化剂注浆剂量和注入流量等因素的影响。通过量纲分析和试验数据拟合,提出了固结桩临界水平抗倾覆力及临界倾斜角的计算公式。A new economical type of pre-cast flashboard spur dike with consolidation piles is introduced,of which the main anti-overturning component is the consolidation pile.The overturning resistance characteristics of the consolidation piles were intensively investigated by indoor experiment and 3-D scanning technology on a fine sand foundation bed.The results show that the grouting agent can react with the ambient soil and a large rigid bulbous body around the toe of the pile forms after the consolidation of the injected grouting agent,which can significantly improve the anti-overturning force of the pile.The toppling process of the consolidation pile can be divided into four different stages,including slight-tilting stage,tilting stage,toppling stage,and out-pulling stage.The anti-overturning force is mainly affected by the structural geometry,penetration depth,soil properties,grout volume and injection rate of the grouting agent.Formulas of the critical horizontal anti-overturning force and critical angle of inclination were proposed based on dimensional analysis and experimental data fitting.

关 键 词：平板丁坝 固化剂 注浆 桩 抗倾覆力 细砂基床 

分 类 号：TV863[水利工程—水利水电工程] U565[交通运输工程]