变截面螺纹桩复合地基竖向承载特性研究的中期报告.docx

变截面螺纹桩复合地基竖向承载特性研究的中期报告
摘要：
变截面螺纹桩复合地基作为一种新型的地基加固技术，在工程实践中得到了广泛应用。本研究采用数值模拟的方法，研究了变截面螺纹桩复合地基的竖向承载特性。首先，采用有限元软件ABAQUS建立了变截面螺纹桩复合地基的有限元模型。然后，通过对模型进行荷载作用模拟，得到了变截面螺纹桩复合地基的竖向承载力与位移关系曲线。最后，通过对模型的分析与结果的比较，得出了以下结论：在相同的桩径和桩长情况下，变截面螺纹桩复合地基的竖向承载力明显优于传统的承台式桩基础；变截面螺纹桩复合地基的竖向承载力受到桩径变化的影响较小，而桩长的增加可以提高其承载力。
关键词：变截面螺纹桩；复合地基；竖向承载力；有限元分析
Abstract:
Asanewfoundationreinforcementtechnology,thecompositefoundationwithvariablecross-sectionthreadedpileshasbeenwidelyusedinengineeringpractice.Inthisstudy,theverticalbearingcharacteristicsofthecompositefoundationwithvariablecross-sectionthreadedpileswereinvestigatedbynumericalsimulation.Firstly,afiniteelementmodelofcompositefoundationwithvariablecross-sectionthreadedpileswasestablishedusingABAQUSfiniteelementsoftware.Then,therelationshipcurvebetweenverticalbearingcapacityanddisplacementofcompositefoundationwithvariablecross-sectionthreadedpileswasobtainedbyloadsimulation.Finally,thefollowingconclusionsweredrawnthroughtheanalysisofthemodelandthecomparisonoftheresults:underthesamepilediameterandlength,theverticalbearingcapacityofthecompositefoundationwithvariablecross-sectionthreadedpilesissignificantlybetterthanthatofthetraditionalbearingplatepilefoundation;theverticalbearingcapacityofthecompositefoundationwithvariablecross-sectionthreadedpilesislessaffectedbythepilediametervariation,andtheincreaseinpilelengthcanimproveitsbearingcapacity.
Keywords:variablecross-sectionthreadedpile;compositefoundation;verticalbearingcapacity;finiteelementanalysis.