桩端桩侧组合后注浆桩现场试验研究  

Field Experimental Study on Post Grouting Pile at Tip and Side

作　　者：王伟 范翔宇 宋劲松 李海涛 WANG Wei;FAN Xiang-yu;SONG Jin-song;LI Hai-tao(Shandong Luqiao Group Co.,Ltd.,Ji′nan 250014,China;School of Qilu Transportation,Shandong University,Ji′nan 250002,China)

机构地区：[1]山东省路桥集团有限公司,济南250014 [2]山东大学齐鲁交通学院,济南250002

出　　处：《价值工程》2021年第36期59-61,共3页Value Engineering

摘　　要：后注浆技术已经成为提高桩基承载力,控制桩基沉降的重要措施。本文以现场试验为主要手段,采用钻孔取芯试验、三轴剪切试验对桩端桩侧组合后注浆桩的承载特性进行研究,分析了浆液的扩散范围及组合后注浆技术对桩周土体的加固效果,结果表明,桩端桩侧组合后注浆技术能够显著提高桩周土体的力学参数,在相同注浆压力下,桩端浆液扩散范围大于桩侧浆液扩散范围。在加固土层中,浆液的渗透及压密作用显著。Post grouting technology has become an important measure to improve the bearing capacity and control the settlement of pile foundation.Taking field tests as the main means,this paper studies the bearing characteristics of the combined post grouting pile at the pile end and pile side by using the borehole coring test and triaxial shear test,and analyzes the diffusion range of the grout and the reinforcement effect of the soil around the pile foundation after post grouting techenology.The results show that the combined post grouting technology can improve the mechanical parameters of the soil around the pile foundation.Under the same grouting pressure,the grout diffusion range at the pile end is greater than that at the pile side.In the reinforced soil layer,the permeability and compaction of grout are significant.

关 键 词：组合后注浆技术 现场试验 桩基承载特性 

分 类 号：TU473.1[建筑科学—结构工程]