【作者】 王凯；

【导师】 姚占勇； 姚凯；

【作者基本信息】 山东大学 ， 道路与铁道工程， 2025， 硕士

【摘要】 浆喷桩加固技术凭借施工高效性、材料兼容性及成本经济性等综合优势,自20世纪80年代引进国内以来,已经发展成为交通基建、工民建筑等地基加固工程的标准化解决方案。然而在山东省黄泛区广泛分布的背景下,浆喷桩施工技术暴漏出冒浆、搅拌不均匀、桩身夹土、部分土层成桩质量差甚至不成桩等地层适配性不足引发的工艺缺陷,对工程质量和安全构成严重威胁,限制了其在该地区的工程应用,阻碍了黄泛区浆喷桩施工的发展。本文以黄泛区典型场地为研究对象,通过双桥静力触探现场试验,明确了复杂地层条件下双桥静力触探参数的变化规律。基于现场试验对现有的双桥静力触探土层划分公式进行验证与修正;通过深入研究浆喷桩装备与静力触探设备的施工工作原理,成功研发出浆喷桩施工钻探一体装备,实现浆喷桩施工的“探测-施工”一体化,显著提升施工效率与成桩质量;基于修正后的土层划分公式及研发的钻探一体装备,设计出涵盖“地质识别-参数匹配-施工调控”一体化的浆喷桩施工控制系统,实现浆喷桩施工的智能化与自动化;基于现场试验对试验数据进行分析,验证浆喷桩钻探一体装备及其控制系统在实际工程应用中的可靠性和稳定性,也为黄泛区浆喷桩施工技术的优化与推广提供坚实的数据支持和技术保障。本文主要研究内容和结论如下:(1)通过现场试验深入探究了黄泛区不同土层的双桥静力触探关键参数分布规律,并验证现有双桥静力触探土分类图法在复杂土层准确性的不足。基于此引入支持向量机(SVM)算法,对黄泛区双桥静力触探土层划分公式进行优化修正。现场试验结果表明,修正后的土层识别与划分准确率高达95%以上,显著提升了划分精度。同时结合已有研究对黄泛区不同土层的适宜喷浆压力进行现场试验,最终确定了在黄泛区浆喷桩施工中,黏土土层采用20MPa,粉质黏土采用15MPa,粉土、粉砂和砂土采用5MPa的浆压施工参数,可有效控制施工成本及确保成桩质量,为黄泛区浆喷桩施工提供了科学的参数指导。(2)基于浆喷桩与静力触探设备的工作原理,开展钻探一体装备的研发工作。重点针对钻探一体装备的联动装置、钻杆及钻头、密封装备以及线路布设等关键部位工作进行研发。同时利用Solid Works软件进行建模,通过ANSYS Workbench进行仿真模拟,对钻探一体装备核心部件的联动装置性能进行深入分析。结果表明在施工过程中,联动装置的止动板和稳定杆连接的上部位置受力最大,所有装备均可稳定工作运行。最终通过现场试验验证了浆喷桩钻探一体装备能够正常施工,确保了装备的顺利运行。(3)基于浆喷桩施工钻探一体装备施工需求,开展智能化控制系统的研发工作。依据钻探一体装备的工作需求将其优化为相应模块,并对各模块进行了详细设计。在此基础上搭建了钻探一体控制系统的硬件架构,完成了相关设备的选型并设计相应控制电路;在软件方面针对控制系统,采用HMI作为上位机、PLC作为下位机,完成了程序和软件设计。最终对整套控制系统的各个模块进行了全面测试和验证,确保了控制系统的运行稳定性和可靠性。(4)基于浆喷桩钻探一体装备及控制系统研发,开展现场试验探究复杂地层条件下速度因素对双桥静力触探数据准确性影响。同时针对浆喷桩施工钻探一体装备的探测数据准确性进行了深入验证,通过对比常规CPT和钻探一体装备试验数据拟合度发现两者皮尔逊系数皆在0.8以上,说明试验数据具有极强相关性,同时验证钻探一体装备超前探测数据准确可靠,进一步分析发现土层划分修正公式准确率最低在70%,而土分类图法部分土层划分准确率维持在30%左右,修正后的土层划分公式准确率远超现有公式,为浆喷桩钻探一体装备的施工运行提供了坚实的理论依据和数据支持。更多还原

【Abstract】 Since its introduction into China in the 1980s,the wet jet mixing reinforcement technology has become a standard solution for foundation reinforcement works in transport infrastructure and industrial and civil construction,due to its comprehensive advantages of high construction efficiency,material compatibility and cost economy.However,in the widely distributed the Yellow River flooding area of Shandong Province,the wet jet mixing construction technology has been exposed to the process defects caused by insufficient ground suitability,such as slurry bubbling,uneven mixing,soil entrapment in the pile body,and poor piling quality and even pile failure in some soil layers,which poses a serious threat to the quality and safety of the project,restricting the application of wet jet mixing in this area and impeding the development of wet jet mixing construction in the Yellow River flooding area.In this paper,based on the typical sites in the Yellow River flooding area,we carry out the field test of double-bridge static cone penetration test to investigate the range of parameters of double-bridge static cone penetration test under the complex geological conditions.Based on the field test,the existing soil layer division formula of double-bridge static cone penetration test is validated and optimized;through in-depth research on the construction working principle of wet jet mixing equipment and static cone penetration test equipment,a set of drilling and probing equipment for wet jet mixing construction is successfully developed,which realizes the integration of ’probing-construction’ in the construction of wet jet mixing,and significantly improves the efficiency of the construction and quality of the finished piles.Based on the modified soil layer division formula and the drilling equipment,a set of wet jet mixing construction control system covering the integration of ’ geological identification-parameter matching-construction control ’ is designed,which realizes the intelligence and automation of wet jet mixing construction;based on on-site test,the test data are analyzed to verify the performance of the wet jet mixing drilling equipment and its control system in practical engineering application.Based on the field test,the test data are analyzed to verify the reliability and stability of the wet jet mixing drilling equipment and its control system in actual engineering application,and to provide solid data support and technical guarantee for the optimization and promotion of the wet jet mixing construction technology in the Yellow River flooding area.The main research contents and conclusions of this paper are as follows:(1)Through field tests,the distribution range of key parameters of double-bridge static cone penetration test in different soil layers in the Yellow River flooding area is deeply explored,and the inadequacy of the existing double-bridge static touchdown soil classification map method in the accuracy of complex soil layers is verified.Therefore,a support vector machine(SVM)algorithm is introduced to optimize and correct the soil layer classification formula of double-bridge static touchdown in the Yellow River flooding area.The field test results show that the accuracy of the modified soil layer identification and classification is up to more than 95%,which significantly improves the classification accuracy.Meanwhile,the field test on the suitable slurry pressure for different soil layers in the Yellow River flooding area combined with the existing research has finally determined the slurry pressure construction parameters of 20MPa for clay soil layer,15MPa for silty clay,and 5MPa for silt,silt sand and sand in the construction of wet jet mixing in the Yellow River flooding area,which can effectively control the construction cost and ensure the quality of piles,and provide scientific parameter guidance for the wet jet mixing in the construction of the Yellow River flooding area.(2)Based on the working principle of wet jet mixing and static touch probing equipment,carry out the research and development of drilling and probing equipment.Focusing on the key parts of the drilling equipment,such as linkage device,drill pipe and drill bit,sealing equipment and line laying.Using Solid Works software for modelling and ANSYS Workbench for simulation,the performance of the linkage device,which is the core component of the drilling equipment,is analyzed in depth.The results show that during the construction process,the position of the stop plate of the linkage device is subjected to the greatest force.Finally,the field test verified that the wet jet mixing drilling equipment can be constructed normally,which ensures the smooth operation of the equipment.(3)Based on the construction requirements of the drilling equipment for wet jet mixing construction,the research and development of intelligent control system is carried out.Based on the working requirements of the drilling equipment,the system is optimized into corresponding modules,and the modules are designed in detail.The hardware architecture of the integrated drilling control system was built on this basis,the selection of relevant equipment was determined,and the control circuit was designed;in terms of software for the control system,HMI was adopted as the upper computer and PLC as the lower computer,and the programme and software design were carried out respectively.Finally,the modules of the whole set of control system were comprehensively tested and verified on site to ensure the stability and reliability of the control system.(4)Based on the research and development of wet jet mixing drilling equipment and control system,field tests are carried out to investigate the influence of speed factor on the accuracy of double-bridge static force touching data under the conditions of complex strata.At the same time,the accuracy of the drilling equipment for wet jet mixing construction was verified in depth.By comparing the fit of the conventional CPT and the drilling equipment,it was found that the Pearson’s coefficient of the two was above 0.8,indicating that the experimental data had a very strong correlation,simultaneously verifying the accuracy and reliability of the drilling and exploration equipment’s early detection data.Further analysis reveals that the accuracy of the amended formula for soil layer division is at least 70%,while the accuracy of the soil classification map method for partial soil layer division is maintained at about 30%,and the accuracy of the amended formula for soil layer division is far more than the existing formula,which provides a solid theoretical basis and data support for the construction and operation of the slurry spraying pile drilling and exploration equipment.更多还原