基于高应变动力测试的波动方程可打性分析  

Wave Equation Drivability Analysis Based on High Strain Dynamic Testing

作　　者：邹昌喜 Zou Changxi(Central Southern China Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group)

机构地区：[1]中国电力工程顾问集团中南电力设计院有限公司,武汉市430000

出　　处：《勘察科学技术》2024年第S1期124-127,134,共5页Site Investigation Science and Technology

基　　金：中国电力工程顾问集团中南电力设计院有限公司科技项目(40-1A-KY202210-G501)

摘　　要：随着大直径钢管桩在海上新能源领域的广泛应用,沉管桩可打性分析在预判和解决沉桩施工技术难题及安全隐患上发挥了重要作用。该文以山东某海上风电项目3#变截面大直径钢管桩工程为例,从土阻力分析高应变动力测试与可打性分析的内在联系,通过高应变动力初打测试和复打测试,完善了本工程场地条件下的土阻力模型,基于此构建了桩-锤-土相互作用系统,通过波动方程分析计算软件GRLWEAP进行了可打性分析。计算结果所得的桩承载力、桩身最大应力值、终锤贯入度等数据均与实测值十分接近,验证了基于高应变动力测试的波动方程可打性分析准确性较高,能为沉桩施工可行性提供科学的技术指导。As large-diameter steel pipe piles are increasingly used in offshore new energy fields,drivability analysis plays an important role in predicting and solving technical difficulities and safety hazards in pile sinking construction.Taking the 3#variable-section large-diameter steel pipe pile of an offshore wind power project in Shandong Province as an example,the intrinsic relationship between high-strain dynamic tests and drivability analysis is analyzed from the perspective of soil resistance development mechanism.Through the high-strain dynamic initial driving tests and repeated driving tests,the soil resistance model under the site conditions of this project is improved.Based on this,a pile hammer soil interaction system has been constructed.The drivability analysis is conducted through the wave equation analysis calculation software GRLWEAP.The calculation results such as the pile bearing capacity,the maximum stress value of the pile body,and the final hammer penetration data are very close to the actual measured values,which verifes that the wave equation drivability analysis based on high-strain dynamic tests is comparative accurate and can be used for pile sinking and provide scientific technical guidance on construction feasibility.

关 键 词：钢管桩 高应变 波动方程 可打性分析 GRLWEAP 

分 类 号：P75[天文地球—海洋科学] TM614[电气工程—电力系统及自动化] TU753.3[建筑科学—建筑技术科学]