RESEARCH ON THE TENSILE FIELD-TESTING OF THE SOIL NAILING RETAINING WALL IN DEEP EXCAVATION
-
摘要: 通过对国际烟草大厦深基坑土钉支护内力的现场测试,对土钉拉力的分布变化规律开展研究。现场测试结果表明:土钉在基坑边坡的中部承受拉力最大,上、下部受力较小,其最大拉力作用点出现在近面层2.0 m处,与基坑边坡潜在滑动面趋于一致。土钉承受拉力具有开挖效应和时间效应,随时间增长土钉拉力增加,基坑每一步开挖,已设置土钉的拉力都有大幅提高,至开挖结束一段时间后,土钉拉力趋于稳定。因而,基坑开挖后应立即进行土钉支护,以充分发挥土钉的加筋作用。Abstract: By the site test of soil nailing tensile force in the soil nailing retaining wall of the International TobaccoBuilding in Longyang of Fujian, the distribution of soil nailing tensile fore was researched. The investigated resultsshowed that the maximum tensile force of soil nails appeared at the middle part, the smaller tensile force appeared atthe top part and the bottom part of retaining wall. The maximum tensile force emerged at the distance of 2 meters fromthe surface of retaining wall, which was in accordance with potential slip surface. The tensile force of soil nails hadtime effect, increasing with time flowing and excavating, and gradually tended to stable at a period of time afterfinishing excavation. In orde to put into full play of the soil nailing retaining wall, the soil nails should be constructedas quickly as possible.
-
Key words:
- soil nailing retaining wall /
- deep excavation /
- supporting /
- tensile testing
-
[2] 李象范,尹骥,许峻峰,等.基坑工程中复合土钉支护(墙)受力机理及发展[J].工业建筑,2004,34(5):45-52. 左丽华,李国生,陈诗高.基坑支护技术在膨胀土地区的应用初探[J].合肥工业大学学报:自然科学版,2000,23(S1):788-791. [3] 潘龙,王建国.土钉支护的能量法稳定分析[J].合肥工业大学学报:自然科学版,2011,34(5):734-738. [4] Stocker M F,Iedinger G R. The Bearing Behavior of Nailed Retaining Structures[J]. GSP,ASCE,1 990(25 ): 61 2-61 8. [5] Shen C K,De Natale J S,Romstad K M,et al. Field Measurement of an Earth Support System [J]. Journal of the Geotechnical Engineering Division,ASCE,1 981: 1 625-1 642. [6] 周自梁,赵付朝,袁加贝.复合土钉墙技术在深基坑支护中的应用[J].山西建筑,2006,32(3):90-91. [7] 王贵和,贾苍琴,季荣生,等.深大基坑两级复合土钉支护现场测试研究[J].岩土力学,2009,29(10):2823-2828. [8] 段建立,谭跃虎,樊有维,等.复合土钉支护的现场测试研究[J].岩石力学与工程学报,2004,23(12):2128-2132. [9] 杨茜,张明聚,孙铁成.软弱土层复合土钉支护试验研究[J].岩土力学,2004,25(9):1401-1408. [10] 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. [11] 杨广庆,张保俭,吕鹏,等.土钉墙防护顺层石质高边坡工作性状研究[J].岩石力学与工程学报,2005,24(S2):5346-5349. [12] 吴国翔,邹扬帆.广州珠江新城E2区基坑土钉支护工作性能的研究[J].四川建筑科学研究,2006,32(2):90-94. [13] 郑志辉,贺若平,徐勋长,等.复合土钉支护厚杂填土边坡现场试验研究[J].岩石力学与工程学报,2005,24(5):898-904. [14] 娄国充,周德培.软岩高边坡土钉支护的监测分析与优化设计[J].岩石力学与工程学报,2004,23(16):2734-2738. [15] 贾金青,张明聚.深基坑土钉支护现场测试分析研究[J].岩土力学,2003,24(3):413-416. [16] 戴秀珍.深基坑桩锚复合土钉支护结构现场试验研究[J].路基工程,2008(3):106-107. [17] 熊勃,刘帅花.某基坑工程土钉支护工作性状试验研究[J].岩土工程技术,2008,22(5):257-259. [18] 姚刚,刘晓纲,韩森.超深基坑复合土钉支护结构原位试验研究[J].土木工程学报,2006,39(10):92-96. [19] 徐文杰,胡瑞林.循环荷载下土石混合体力学特性野外试验研究[J].工程地质学报,2008(1):63-69. [20] 闫金凯,殷跃平,门玉明.微型桩单桩加固滑坡体的模型试验研究[J].工程地质学报,2009(5):669-674.
点击查看大图
计量
- 文章访问数: 89
- HTML全文浏览量: 5
- PDF下载量: 92
- 被引次数: 0