微型钢管桩-锚支护受力特性现场试验  

Field Test on Mechanical Performance of Micro-Steel Pipe Piles-Anchor Support in Combined Stratum

作　　者：葛玉宁 王永洪[2] 姜领发[3] 杨昆 张玉垒 张东 孙俊亮 张启军 黄永峰 张硕 王东雷 Ge Yuning;Wang Yonghong;Jiang Lingfa;Yang Kun;Zhang Yulei;Zhang Dong;Sun Junliang;Zhang Qijun;Huang Yongfeng;Zhang Shuo;Wang Donglei(Shandong Luqiao Group Co.,Ltd.,Jinan 250014,China;College of Civil Engineering,Qingdao University of Technology,Qingdao 266033,Shandong,China;Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;Zhongqing Jian’an Construction Group Co.,Ltd.,Qingdao 266023,Shandong,China;Zhongxin Construction Engineering Co.,Ltd.,CSCEC,Shandong Branch,Qingdao 266109,Shandong,China;Jianhua Building Materials(Laiyang)Co.,Ltd.,Yantai 265200,Shandong,China;Qingdao Yegao Construction Engineering Co.,Ltd.,Qingdao 266011,Shandong,China;Qingdao Yongyuan Marine Technology Co.,Ltd.,Qingdao 266033,Shandong,China;Qingdao Green Technology Geotechnical Engineering Co.,Ltd.,Qingdao 266033,Shandong,China)

机构地区：[1]山东省路桥集团有限公司,济南250014 [2]青岛理工大学土木工程学院,山东青岛266033 [3]中国科学院武汉岩土力学研究所,武汉430071 [4]中青建安建设集团有限公司,山东青岛266023 [5]中建中新建设工程有限公司,山东青岛266109 [6]建华建材(莱阳)有限公司,山东烟台265200 [7]青岛业高建设工程有限公司,山东青岛266011 [8]青岛永元海洋科技有限公司,山东青岛266033 [9]青岛绿色理工岩土工程有限公司,山东青岛266033

出　　处：《吉林大学学报(地球科学版)》2025年第1期199-208,共10页Journal of Jilin University:Earth Science Edition

基　　金：山东省自然科学基金面上项目(ZR2022ME143)。

摘　　要：为了研究微型钢管桩-锚支护在土岩结合地层中的受力特性,以及钢管桩在不同开挖深度和锚索、锚杆施工完毕后的内力变化,在青岛地铁某车站进行现场试验,采用3阶微型钢管桩结合锚索、锚杆的方式对基坑进行加固,并对基坑第1阶内排两根测试桩进行内力测试。结果表明:开挖面附近与桩顶处弯矩较大,测得弯矩最大值超过15 kN·m;锚索锁定能有效抑制弯矩发展,桩身内力变化规律与土岩地质条件相关性明显,土岩边界易出现弯矩极值,正弯矩最大值为32.43 kN·m。In order to study the stress characteristics of micro-steel pipe pile-anchor support in soil-rock-bound stratum,as well as the internal force changes of steel tubular pile at different excavation depths and after the completion of anchor cable and anchor rod construction,a field test was carried out in a subway station in Qingdao.The foundation pit was strengthened by using the third-order micro-steel pipe pile combined with anchor cable and anchor rod,and the internal force test was carried out on two test piles in the first order of the foundation pit.The steel pipe piles in different excavation depth,anchor and anchor cable construction after the completion of the internal force of change.The results show that the bending moment near the excavation surface and the top of the pile is large,the measured bending moment value is up to more than 15 kN·m.The anchor cable lock can effectively suppress the development of bending moment.The law of the internal force changes in the pile body is obviously related to the earth rock geological conditions,and the maximum positive bending moment is 32.43 kN·m.

关 键 词：微型钢管桩 土岩结合地层 受力特性 基坑 内力 弯矩 

分 类 号：TU473[建筑科学—结构工程]