CAJ | 학술논문

以京沪高速铁路丹阳至昆山特大桥阳澄湖桥段为工程背景,通过现场试验,研究角桩桩侧注浆和边桩桩侧注浆对深厚软土层中群桩基础在正常使用状态下沉降量的控制.运用数值模拟方法,分析由桩侧压力注浆引起的桩-土体系中桩土界面参数和桩周土模量变化埘群桩基础在设计荷载下沉降量的影响.研究结果表明:由于桩侧注浆的作用会使桩土界面参数变大和桩周土模量提高,从而对深厚软土层中正常使用状态下群桩基础的沉降可以起到明显的控制作用;边桩桩侧注浆的效果优于角桩桩侧注浆;桃侧注浆浆液在土中的扩散范围直接影响群桩基础的沉降量.
이경호고속철로단양지곤산특대교양징호교단위공정배경,통과현장시험,연구각장장측주장화변장장측주장대심후연토층중군장기출재정상사용상태하침강량적공제.운용수치모의방법,분석유장측압력주장인기적장-토체계중장토계면삼수화장주토모량변화시군장기출재설계하재하침강량적영향.연구결과표명:유우장측주장적작용회사장토계면삼수변대화장주토모량제고,종이대심후연토층중정상사용상태하군장기출적침강가이기도명현적공제작용;변장장측주장적효과우우각장장측주장;도측주장장액재토중적확산범위직접영향군장기출적침강량.
Taking Yangcheng Lake segment of Danyang-Kunshan super large bridge of Beijing-Shanghai high-speed railway as the engineering background, we carried out field tests to study the control effect of the corner pile shaft grouting and side pile shaft grouting on the settlement volume of pile group foundation under normal service in thick soft clay. We also used the numerical simulation method to analyze the im-pact of the variations of two parameters, which were the parameter of the interface between pile and soil and the deformation modulus of the soil around pile in pile-soil system, caused by pile shaft grouting on the settlement of pile group foundation under design load. It can be concluded from the research that the side pile shaft grouting can increase the parameter of the interface between pile and soil, and the deformation modulus of soil around pile, thus has an evident effect on the control of the settlement volume of pile group foundation under normal service in the thick soft clay. The control effect of side pile shaft grouting is more obvious than corner pile shaft grouting. When carrying out pile shaft grouting, the spread range of the grout in the soil will directly affect the settlement of pile group foundation.