护圈和石笼结构防护下桥墩局部冲刷试验研究-学报杂志社

期刊信息

合肥工业大学（自然科学版），2024年12月，第47卷第12期：1721-1728

DOI: 10.3969/j.issn.1003-5060.2024.12.022

作者信息

魏松 $ ^{1} $，余海强 $ ^{1} $，吴永刚 $ ^{2} $，朱大勇 $ ^{3} $，苏陈 $ ^{1} $，童煜霄 $ ^{4} $

（1. 合肥工业大学土木与水利工程学院，安徽合肥 230009；2. 中建四局第六建设有限公司，安徽合肥 230011；3. 浙大宁波理工学院土木建筑工程学院，浙江宁波 315100；4. 开化水库建设中心，浙江开化 324399）

摘要和关键词

摘要: 桥墩基础局部冲刷是造成涉河桥梁水毁最主要因素, 对可能冲刷区域进行防护是降低基础冲刷危害的主要措施。文章选取矩形墩和双排圆柱形墩, 基于主动和被动防护机理的护圈和石笼防护结构, 考虑防护范围和流速因素, 进行了桥墩基础局部冲刷试验; 采用极差分析和相关性分析的方法, 对墩型和防护措施结合后的基础局部冲刷演化过程和抗冲刷防护性能进行深入研究, 探究防护效果与不同影响因素间的关系。结果表明: 外径因素对防护效果的影响程度大于措施因素的影响程度; 对矩形墩进行防护时, 低流速下优先选用护圈结构, 中高流速下两者均可采用; 对双排圆柱形墩进行防护时, 优先选用石笼结构; 在护圈或石笼结构防护下的矩形墩、双排圆柱形墩局部冲刷深度计算中, 基底修正系数 $ K_{D} $ 与防护比 $ D_{p}/D $ 更符合二次函数关系。

关键词: 局部冲刷；护圈结构；石笼结构；矩形墩；双排圆柱形墩

Authors

WEI Song $ ^{1} $, SHE Haiqiang $ ^{1} $, WU Yonggang $ ^{2} $, ZHU Dayong $ ^{3} $, SU Chen $ ^{1} $, TONG Yuxiao $ ^{4} $

(1. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China; 2. China Construction 4th Engineering Bureau 6th Co., Ltd., Hefei 230011, China; 3. School of Civil Engineering and Architecture, Ningbo Tech University, Ningbo 315100, China; 4. Kaihua Reservoir Construction Center, Kaihua 324399, China)

Abstract and Keywords

Abstract: Local scour of bridge pier foundation is the main factor that causes flood damage of bridge crossing river, and the protection of potential scour area is the main measure to reduce the scour damage of the foundation. In this paper, by selecting the rectangular piers and the double-row cylindrical piers, combined with the active and passive protection mechanism of the retaining ring and gabion protection structures, considering the protection range and flow velocity factors, the pier foundation local scour test was carried out. By means of range analysis and correlation analysis, the local scour evolution process and anti-scour protection performance of the foundation combined with pier type and protective measures were studied in depth. The relationship between the protection effect and different influencing factors was explored. The results show that the influence degree of external diameter factors on the protection effect is greater than that of measures; when protecting the rectangular piers, the retaining ring structure is preferred at low flow velocity, and both can be used at medium and high flow velocity; when protecting the double-row cylindrical piers, the gabion structure is preferred; in the calculation of local scour depth of rectangular pier and double-row cylindrical pier under the protection of retaining ring or gabion structure, the relationship between the base correction coefficient $ K_{D} $ and the protection ratio $ D_{p}/D $ is more in line with the quadratic function.

Keywords: local scour; retaining ring structure; gabion structure; rectangular pier; double-row cylindrical pier

基金信息

国家自然科学基金资助项目（51979068）；安徽交通控股集团科技资助项目（2017010650）

合肥工业大学学报(自然科学版)

导航菜单

护圈和石笼结构防护下桥墩局部冲刷试验研究