群桩基础周围局部冲刷地形瞬时绘制系统研制

doi:10.3969/j.issn.1674-0696.2022.04.17

重庆交通大学学报（自然科学版） ›› 2022, Vol. 41 ›› Issue (04): 113-119.DOI: 10.3969/j.issn.1674-0696.2022.04.17

群桩基础周围局部冲刷地形瞬时绘制系统研制

倪飞1，陈红2，罗云峰3，朱庆1，王浩丞1

(1. 江苏航运职业技术学院船舶与海洋工程学院江苏南通 226010； 2. 河海大学水利水电学院，江苏南京210098； 3. 南通市江海测绘院有限公司江苏南通 226010)

收稿日期:2020-05-29 修回日期:2021-01-13 发布日期:2022-04-13
作者简介:倪飞(1983—)，男，江苏连云港人，高级工程师，硕士，主要从事水下地形测绘与数据后处理等方面的研究。E-mail：nifei@ntsc.edu.cn
基金资助:
江苏省高校优秀科技创新团队项目(2017-49)；2018年度中国交通教育研究会课题(交教研1802-192)；2021年江苏高校“青蓝工程”资助项目（JS202102）；江苏省高校“青蓝工程”优秀教学团队项目（2021-176）；南通市科技计划项目（MS12020066）

Development of Instantaneous Mapping System of Local Scour Topography around Pile Groups Foundation

NI Fei1, CHEN Hong2, LUO Yunfeng3, ZHU Qing1, WANG Haocheng1

(1. School of Ship and Ocean Engineering, Jiangsu Maritime Institute, Nantong 226010, Jiangsu, China; 2. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, Jiangsu, China; 3. Nantong Jianghai Surveying and Mapping Institute Co., Ltd., Nantong 226010, Jiangsu, China)

Received:2020-05-29 Revised:2021-01-13 Published:2022-04-13

摘要/Abstract

摘要： 三维水下地形的常规量测装备及方法还不能实现模型试验中涉水结构物周围全区域水下地形的瞬时绘制，致使目前还几乎没有对桥梁群桩基础周围局部冲刷发展特性进行细致地研究。因此，研制了一种河工模型试验中涉水结构物周围冲淤地形实时测绘系统，量化了实时测绘系统的各项设计参数，并据此研究了群桩基础周围局部冲刷随时间的动态发展变化特性。结果表明，测绘系统能够实现群桩基础局部冲刷发展全过程的动态实时测绘，效率高，误差小。局部冲刷发展过程中，在三维旋涡体系共同作用下，群桩基础上游河床率先出现冲刷，且冲刷发展比下游要快，冲刷深度和范围也比下游要大；冲刷坑也会同时向上游和下游发展，而且冲刷向上游发展很快，向下游发展较慢，极限冲刷深度值出现在群桩基础外侧靠近迎水面处。

关键词: 测绘工程；桥梁工程；群桩基础；水下地形；测绘装备；局部冲刷

Abstract: The conventional measuring equipment and methods of three-dimensional underwater terrain cannot achieve instantaneous rendering of the entire underwater terrain around the wading structure in the model experiment. As a result, there is almost no detailed study on the development characteristics of local scour around bridge pile group foundation. Therefore, a real-time surveying and mapping system for the scouring and silting terrain around the wading structures in the river engineering model experiment was developed. The design parameters of real-time surveying and mapping system were quantified. Based on the above, the dynamic development characteristics of local scour around pile group foundation changing with time were studied. The research results show that the surveying and mapping system can realize dynamic real-time mapping of the whole process of local scouring development of pile group foundation, with high efficiency and small error. During the local scouring development, under the combined action of the three-dimensional vortex system, the riverbed upstream of the pile group foundation first appears scouring, and the scouring development is faster than that downstream; the scouring depth and scope are also larger than those in the downstream, and the scouring pit will develop to the upstream and downstream at the same time. Moreover, the scouring develops rapidly upstream and slowly downstream, and the limit scouring depth appears outside the pile group foundation near the upstream surface.

Key words: geomatics engineering; bridge engineering; pile groups foundation; underwater topography; surveying and mapping equipment; local scour

中图分类号:

U442

倪飞1，陈红2，罗云峰3，朱庆1，王浩丞1. 群桩基础周围局部冲刷地形瞬时绘制系统研制[J]. 重庆交通大学学报（自然科学版）, 2022, 41(04): 113-119.

NI Fei1, CHEN Hong2, LUO Yunfeng3, ZHU Qing1, WANG Haocheng1. Development of Instantaneous Mapping System of Local Scour Topography around Pile Groups Foundation[J]. Journal of Chongqing Jiaotong University(Natural Science), 2022, 41(04): 113-119.

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群桩基础周围局部冲刷地形瞬时绘制系统研制

Development of Instantaneous Mapping System of Local Scour Topography around Pile Groups Foundation

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