自升式钻井平台桩靴贯入饱和砂土的机制研究  

RESEARCH ON MECHANISM OF JACK-UP DRILLING PLATFORM SPUDCAN PENETRATING INTO SATURATED SAND

作　　者：周子健 齐昌广[1] 孔纲强[2] 钟方涛 张智超 赖文杰 ZHOU Zi-jian;QI Chang-guang;KONG Gang-qiang;ZHONG Fang-tao;ZHANG Zhi-chao;LAI Wen-jie(Ningbo University,School of Civil and Environmental Engineering,Ningbo,Zhejiang 315211,China;Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing,Jiangsu 210098,China;Technology innovation center of Monitoring and Restoration Engineering of Ecological Fragile Zone in Southeast China,Key Laboratory of Geological Disaster Prevention and Control in Hilly and Mountainous Areas,Ministry of Natural Resources,Ministry of Natural Resources,Fujian Geological Engineering Survey Institute,Fujian,Fuzhou 350002,China)

机构地区：[1]宁波大学土木与环境工程学院,浙江宁波315211 [2]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [3]福建省地质工程勘察院自然资源部东南生态脆弱区监测修复工程技术创新中心,自然资源部丘陵山地地质灾害防治重点实验室,福建福州350002

出　　处：《工程力学》2023年第6期144-157,共14页Engineering Mechanics

基　　金：浙江省自然科学基金项目(LY21E080007);国家自然科学基金项目(41977259);福建省自然资源科技创新项目(KY-090000-04-2021-003)。

摘　　要：为研究桩靴贯入饱和砂土的承载机制以及桩靴周围砂土变形机理,开展桩靴的抗压承载土工模型试验以及桩靴-土体相互作用的透明土试验,测得了桩靴荷载-沉降变化规律、桩靴周围砂土的位移向量场和等值线图,初步探讨了桩靴贯入饱和砂土时的承载机制与桩靴周围砂土变形机理。基于圆孔扩张理论及分段位移迭代算法,推导出静载作用下桩靴荷载-沉降变化规律;与试验结果的对比发现:计算误差约为11.7%。通过浅应变路径法(SSPM)计算得到桩靴周围土体位移理论值;与试验结果对比发现:计算误差在16.7%~26.3%。In order to study the bearing characteristics of spudcan and the deformation mechanism of sand around the spudcan when the spudcan penetrated into saturated sand,model tests of bearing capacity of spudcan as well as transparent soil experiments of spudcan-soil interaction were carried out.The load-settlement curves of spudcan,displacement vector field and contour map of sand around the spudcan were obtained.According to the cavity expansion theory and segmental displacement iterative algorithm,the load-settlement curves of spudcan under static load was also derived,the error of which was about 11.7%compared with the test results.The theoretical displacement of soil around the spudcan was calculated using the shallow strain path method(SSPM).Compared with the test results,it is found that the calculation error was between 16.7%and 26.3%.

关 键 词：桩靴 模型试验 透明土试验 承载机制 SSPM 

分 类 号：TU473[建筑科学—结构工程]