波流作用下单桩冲刷的水泥土防护技术研究及应用  

Research and application of cement-improved soil protection technology for monopile scour under the combine action of wave and current

作　　者：王栋 杜波 戴国亮[2,3] WANG Dong;DU Bo;DAI Guo-liang(China Road&Bridge Corporation,Beijing 100011,China;Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education,Southeast University,Nanjing,Jiangsu 211189,China;School of Civil Engineering,Southeast University,Nanjing,Jiangsu 211189,China)

机构地区：[1]中国路桥有限责任公司,北京100011 [2]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京211189 [3]东南大学土木工程学院,江苏南京211189

出　　处：《中国港湾建设》2024年第3期32-38,共7页China Harbour Engineering

基　　金：国家自然科学基金(52078128)。

摘　　要：桩基础在服役期间遭受波流联合作用会发生冲刷现象,通常需要进行防护防止冲刷加剧。水泥加固土是一种新型的冲刷防护方法,首先通过大量的冲刷起动试验探讨了不同水泥掺入比、养护时间等条件下的水泥加固土的抗冲刷性能。随后开展了一系列水泥土防护单桩的冲刷水槽试验,得到了波流共同作用下不同防护范围的桩周局部冲刷深度的时程发展曲线,并通过试验前后的冲刷坑对比分析了不同防护厚度水泥土的防冲刷性能,最后提出了冲刷防护效率参数,更直观地评价了不同防护范围水泥加固土的冲刷防护性能。Pile foundations may experience scour due to the combined action of waves and currents during service,and protection measures are usually needed to prevent further scour.Cement-improved soil is a new type of scour protection method.Firstly,a large number of incipient motion tests was conducted to explore the anti-scour performance of cement-improved soil under different cement mixing ratios,curing times,and other conditions.Subsequently,a series of flume tests were conducted on cement-improved soil protection monopiles,obtaining the time history development curves of local scour depth around piles with different protection ranges under the combined action of waves and currents.The scour protection performance of cement-improved soil with different protection thicknesses was compared and analyzed through the scour hole pits before and after the test.Finally,the scour protection efficiency parameter was proposed to more intuitively evaluate the scour protection performance of cement-improved soil with different protection ranges.

关 键 词：单桩基础 局部冲刷 水泥加固土 冲刷防护 

分 类 号：U655.54[交通运输工程—港口、海岸及近海工程] P731.2[交通运输工程—船舶与海洋工程] U416.1[天文地球—海洋科学]