水利水电技术（中英文）2026，Vol.57Issue(5)：248-258,11.DOI:10.13928/j.cnki.wrahe.2026.05.019
珊瑚礁灰岩抗侵彻性能试验研究
Experimental study on anti-penetration performance of coral reef limestone
摘要
Abstract
[Objective]The anti-penetration performance of coral reef limestone is of great significance for underground engineering construction and defensive capacity enhancement on islands and reefs.[Methods]To rapidly evaluate the anti-penetration performance of coral reef limestone and establish a penetration depth calculation formula,coral reef limestone with a sandstone-gravel structure from a specific island reef in the South China Sea was used as the research object.The penetration tests with small-mass arc-shaped pointed kinetic energy projectiles within the velocity range of 500～1 100 m/s were conducted using a self-developed high-velocity impact penetration test system.The failure characteristics of the projectiles and the coral reef limestone targets at different penetration velocities were investigated,and the influence of pore structure characteristics on penetration depth and the tunnel zone was analyzed.A penetration depth calculation model was established based on the test result,and the influence of the projectile size effect on penetration depth was discussed.[Results]The results showed that with increasing impact velocity,the degree of projectile abrasion and nose bluntness significantly increased,and a mass loss rate of 7.2％was observed at an impact velocity of 1 038.96 m/s.Within the tested penetration velocity range,the projectile and target were approximately in a rigid-body penetration state,and higher impact velocities resulted in larger crater volumes.The irregular pore distribution within the coral reef limestone targets caused projectile deflection and tunnel zone bending,Resulting in a reduction in penetration depth.Furthermore,the trajectory deflection in the tunnel zone weakened with increasing penetration velocity.Based on the penetration test data of coral reef limestone,an empirical formula for calculating penetration depth was obtained using dimensional analysis and the Levenberg-Marquardt algorithm fitting.[Conclusion]The penetration depth calculation formula for coral reef limestone can guide the design of protective layer thickness and chamber burial depth,providing theoretical references for ensuring the safety of island and reef engineering.关键词
珊瑚礁灰岩/侵彻/模型试验/侵深计算公式/尺寸效应/力学性能/南海岛礁/弹体磨蚀Key words
coral reef limestone/penetration/model test/penetration depth formula/size effect/mechanical properties/South China Sea islands and reefs/projectile erosion分类
建筑与水利引用本文复制引用
王建平,马林建,耿汉生,段力群,马彬,司腾,刘杰..珊瑚礁灰岩抗侵彻性能试验研究[J].水利水电技术（中英文）,2026,57(5):248-258,11.基金项目
国家自然科学基金项目(52371299) （52371299）
国家自然科学基金优秀青年基金项目(52222110) （52222110）
