大直径泥浆护壁嵌岩灌注桩承载特性现场试验  

Field test on bearing behavior of large diameter rock-socketed cast-in-place piles with mud protection

作　　者：苗德滋 张明义[1,2] 白晓宇[1,2] Miao Dezi1;Zhang Mingyi1,2;Bai Xiaoyu 1,2(1. School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, Shandong ; 2. Collaborative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao University of Technology, Qingdao 266033)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]青岛理工大学蓝色经济区工程建设与安全协同创新中心,山东青岛266033

出　　处：《工程建设》2018年第4期6-10,共5页Engineering Construction

基　　金：国家自然科学基金资助项目(51708316;51778312);山东省重点研发计划项目2017GSF16107);山东省自然科学基金项目(ZR2016EEQ08;ZR2017PEE006);山东省高等学校科技计划项目(J16LG02);青岛市应用基础研究计划项目(16-5-1-39-jch)

摘　　要：以威海某高层住宅桩基工程为例,对3根大直径泥浆护壁嵌岩钻孔灌注桩(其中1根采用桩侧后注浆处理)进行静载荷试验分析其承载性能。研究结果表明:3根试桩承载力及沉降均满足设计要求。采用桩侧后注浆处理的试桩的桩身沉降及回弹量相比其余试桩减小幅度均超过29%。Taking a pile foundation project of a high-rise residential building in Weihai for example,the bearing capacity of 3 large diameter rock-socketed cast-in-place piles with mud protection(one of them is treated by postgrouting） was analyzed through static load test. The results show that the bearing capacity and settlement of the 3 test piles all meet the design requirements. The pile settlement and springback of test pile treated with post-grouting is more than 29% lower than that of the remaining piles.

关 键 词：泥浆护壁钻孔灌注桩 大直径桩 静载荷试验 承载特性 

分 类 号：TU473.1[建筑科学—结构工程]