摘要
破碎锤破岩法作为一种生态环保的清礁方法,在工程建设及航道整治开挖中得到越来越广泛的使用,但关于高频振动冲击作用下礁石损伤演化规律研究较少,破碎锤冲击参数对礁石损伤破碎的影响研究不足。基于水下破碎锤清礁现场试验数据,建立破碎锤冲击下岩体损伤数值计算模型,探究不同参数下的破碎锤破礁规律,并运用极差分析法分析破碎锤破礁的主控因素。结果表明:随着工作油压的增大,礁石破碎参数非线性增加,破碎体积线性增加;随着冲击频率的增大,礁石破碎参数值先增加后保持不变;随着礁石强度增加,礁石破碎参数值均减小;工作油压是破碎锤破礁效率的主控因素,其次是冲击频率,最后是礁石强度。
As an ecological and environmentally friendly method for reef cleaning,the rock breaking method by a breaking hammer is increasingly widely used in engineering construction and waterway regulation and excavation.However,there are few studies on the evolution rule of reef damage under high-frequency vibration impact,and insufficient studies are conducted on the impact parameters of a breaking hammer on reef damage.Based on the field test data of underwater reef cleaning by a breaking hammer,this paper establishes a numerical calculation model for rock damage under the impact of a breaking hammer,explores the rules of reef breaking by a breaking hammer under different parameters,and analyzes the main controlling factors of reef breaking by a breaking hammer by using the range analysis method.The results show that with the increase in operating oil pressure,the reef breaking parameters increase nonlinearly,and the reef breaking volume increases linearly.With the increase in impact frequency,the value of the reef breaking parameters first increases and then remains unchanged.With the increase in reef strength,the value of the reef breaking parameters decreases.The operating oil pressure is the main controlling factor for the efficiency of reef breaking by a breaking hammer,followed by the impact frequency,and finally the reef strength.
作者
刘明维
蒋国兴
裴邦学
钟润兵
杜健如
LIU Mingwei;JIANG Guoxing;PEI Bangxue;ZHONG Runbing;DU Jianru(National Engineering Research Center for Inland Waterway Regulation,Key Laboratory of Geological Hazards Mitigation for Mountainous Highway and Waterway,Chongqing Jiaotong University,Chongqing 400074,China;Changjiang Chongqing Waterway Engineering Bureau,Chongqing 400010,China)
出处
《水运工程》
北大核心
2023年第12期151-158,共8页
Port & Waterway Engineering
基金
长江重庆航道工程局科技项目(cqjt-2021-202)。
关键词
水下清礁
破碎锤
3DEC模拟
破礁参数
敏感性分析
underwater reef cleaning
breaking hammer
3DEC simulation
reef breaking parameters
sensitivity analysis
