自平衡高压注浆钢管土钉抗拉性能对比试验研究

详细信息    查看全文 | 推荐本文 |

英文篇名：Comparative experimental study on tensile properties of self balanced high-pressure grouting steel pipe soil nail 作者：张广兴 英文作者：Zhang Guangxing;Department of Civil Engineering, Zhejiang College, Tongji University; 关键词：自平衡 ; 高压注浆 ; 土钉 ; 抗拉性能 英文关键词：self balancing;;high pressure grouting;;soil nailing;;tensile properties 中文刊名：GCKC 英文刊名：Geotechnical Investigation & Surveying 机构：同济大学浙江学院土木工程系; 出版日期：2019-06-25 出版单位：工程勘察 年：2019 期：v.47;No.360 语种：中文; 页：GCKC201907002 页数：4 CN：07 ISSN：11-2025/TU 分类号：15-18

摘要

研发了一种自平衡高压注浆钢管土钉,对其受力特性进行了研究,分析了注浆浆液在土钉中的传力特性,并对相同尺寸的自平衡高压注浆土钉与普通注浆土钉进行了抗拉对比试验。分析结果表明,自平衡高压注浆钢管土钉通过浆液压力的自平衡,可以对土钉孔侧壁进行一次高压注浆,高压注浆对孔壁土体产生压密渗透的作用,可提高土钉注浆体与孔壁土体之间的抗剪强度。两组抗拉试验结果表明,相同的荷载作用下,自平衡加压注浆土钉产生的上拔量只有普通注浆土钉上拔量的54.8%和50.2%,自平衡加压注浆土钉的抗拉性能要明显优于普通注浆土钉。
        A kind of self-balanced high-pressure grouting steel pipe soil nail was developed. The mechanical properties of the soil nail were studied. The force transmission characteristics of grout in the soil nail were analyzed. Tensile tests of the same size self balanced high-pressure grouting soil nailing and common grouting soil nailing were carried out. The analysis results show that the self-balanced high-pressure grouting steel pipe soil nail can be grouted through the self-balanced grouting hydraulic pressure, and the high-pressure grouting will produce the effect of pressure infiltration on the soil of the hole wall, which will improve the shear strength between the grout and the hole wall. Two groups of tensile test results show that under the same load, the uplift of self-balanced pressure grouting soil nail is only 54.8% and 50.2% of that of ordinary grouting soil nail, and the tensile performance of self-balanced pressure grouting soil nail is obviously better than that of ordinary grouting soil nail.

引文

[1] 刘国彬,王卫东.基坑工程手册[M].北京:中国建筑工业出版社,2009,272～274.Liu Guobin,Wang Weidong.Excavation engineering handbook [M].Beijing:China Architecture & Building Press,2009,272～274.(in Chinese)
    [2] 李志刚,任佰俪,秦四清.高压注浆土钉特性及应用[J].岩石力学与工程学报,2004,23(9):1564～1567.Li Zhigang,Ren Baili,Qin Siqing.Characteristics and applications of high-pressure grouting soil nailing [J].Chinese Journal of Rock Mechanics and Engineering,2004,23(9):1564～1567.(in Chinese)
    [3] 张广兴.设计参数对高压与普通注浆土钉影响对比分析[J].工程勘察,2014,42(11):6～11.Zhang Guangxing.Comparative analysis of the impact of design parameters on the high pressure grouting and ordinary grouting soil nail[J].Geotechnical Investigation & Surveying,2014,42(11):6～11.(in Chinese)
    [4] 魏焕卫,王寒冰,付艳青等.土钉墙破坏方式的实践和原因分析[J].工程勘察,2014,(4):1～6.Wei Huanwei,Wang Hanbing,Fu Yanqing et al.Practice of pull-out failures of soil nails and the cause analysis[J].Geotechnical Investigation & Surveying,2014,(4):1～6.(in Chinese)
    [5] 杨育文.我国失事土钉墙的反思[J].工程勘察,2011,(2):22～28.Yang Yuwen.Introspection on the failed soil-nailing walls in some areas of China[J].Geotechnical Investigation & Surveying,2011,(2):22～28.(in Chinese)
    [6] 张明聚,郭忠贤.土钉支护工作性能的现场测试研究[J].岩土工程学报,2001,23(3):319～323.Zhang Mingju,Guo Zhongxian.Research on behaviors of soil nailing by field test[J].Chinese Journal of Geotechnical Engineering,2001,23 (3):319～323.(in Chinese)
    [7] 伍俊,郑全平,吴祥云.复合土钉支护技术的有限元数值模拟及工程应用[J].岩土工程学报,2005,27(4):388～392.Wu Jun,Zheng Quanping,Wu Xiangyun.Numerical simulation in finite element and engineering application of compound soil nail support technology[J].Chinese Journal of Geotechnical Engineering,2005,27(4):388～392.(in Chinese)
    [8] 孙铁成,张明聚,杨茜.深基坑复合土钉支护模型试验研究[J].岩石力学与工程学报,2004,23(15):2585～2592.Sun Tiecheng,Zhang Mingju,Yang Qian.Modeling study on composite soil nailing for deep excavation[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(15):2585～2592.(in Chinese)
    [9] 中华人民共和国行业标准.建筑基坑支护技术规程(JGJ 120-2012)[S].北京:中国建筑工业出版社,2012.The Professional Standards of the People′s Republic of China.Technical specification for retaining and protection of building foundation excavations (JGJ 120-2012)[S].Beijing:China Architecture and Building Press,2012.(in Chinese)