CAJ | 학술논문

在研究群桩注浆相互影响的基础上，对群桩后注浆过程中的群桩效应进行了研究，通过注浆压力的现场实测值分析了不同注浆顺序和水灰比对群桩注浆压力的影响，引入了桩端注浆影响距离系数，并通过现场实测值给出了该系数的大致范围。分析结果表明：注浆顺序由外向内注时，中心桩的注浆压力大，浆液不易扩散；注浆顺序由内向外注时，各桩的注浆压力较为接近，各桩浆液均能较为顺利地注入，由内向外注浆更有利于浆液的扩散。水灰比越小，注浆压力越大，各桩注浆时的相互影响降低。
재연구군장주장상호영향적기출상，대군장후주장과정중적군장효응진행료연구，통과주장압력적현장실측치분석료불동주장순서화수회비대군장주장압력적영향，인입료장단주장영향거리계수，병통과현장실측치급출료해계수적대치범위。분석결과표명：주장순서유외향내주시，중심장적주장압력대，장액불역확산；주장순서유내향외주시，각장적주장압력교위접근，각장장액균능교위순리지주입，유내향외주장경유리우장액적확산。수회비월소，주장압력월대，각장주장시적상호영향강저。
Based on the analysis of the interaction of the grouted pile,the pile group effects under base grou-ting was studied in this paper.The influence of grouting sequence and water-cement ratio on the grouting pres-sure were examined by analyzing the measured data.A parameter,the base grouting influence distance factor was defined and the rough range of this parameter was also obtained from the measurement.The analysis re-sults show that the grouting pressure for center pile is big for the outer-to-inner grouting sequence and the grout may be insufficiently distributed.While for the inner-to-outer grouting sequence,no obvious difference in grouting pressure can be observed at different locations.It indicates that the grout can be injected successfully by following this sequence.In addition,it can be found that the lower the water-cement ratio,the larger the grouting pressure is and the mutual influence is reduced.