• 全国中文核心期刊
  • 中国科技核心期刊
  • 美国工程索引(EI)收录期刊
  • Scopus数据库收录期刊
LI Da-yong, WANG Dong-lin, ZHANG Yu-kun, GAO Yu-feng. Model tests on penetration and extration of modified suction caissons in clay[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(3): 568-575. DOI: 10.11779/CJGE202003019
Citation: LI Da-yong, WANG Dong-lin, ZHANG Yu-kun, GAO Yu-feng. Model tests on penetration and extration of modified suction caissons in clay[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(3): 568-575. DOI: 10.11779/CJGE202003019

Model tests on penetration and extration of modified suction caissons in clay

More Information
  • Received Date: January 28, 2019
  • Available Online: December 07, 2022
  • A series of model tests are conducted to investigate the installation and extraction behavior of the modified suction casson(MSC) embedded in marine clay by taking the MSC dimensions, shear strength of clay and installation method into account. It is found that the discrepancies between the final penetration depths of the MSC with the aspect ratio of 1.0 and 2.0 and the corresponding regular suction caissons (RSCs) are 2% and 6%, indicating that the MSC can penetrates into the clay to a desired depth. During suction-assisted installation, the internal compartment and the external skirt are found to disturb the soils around the caisson, leading to the decrease of the penetration resistance compared with the penetration resistance during jacking installation. Based on the limit equilibrium method, the expressions for estimating the required suction to penetrate the MSC into clay and the penetration resistance were proposed. In addition, the variations of the water pressure in the suction caisson and uplift resistance during suction caisson extraction are also obtained. The results show that the water pressure in suction caisson firstly increases sharply to the maximum value with the extraction displacement, and then decreases to a certain value. It is also found that the MSCs and RSCs can not be fully extracted by injecting water into the caisson. The expression obtaining the extraction resistance of the MSC is proposed to guide the foundation design.
  • [1]
    李大勇, 张雨坤, 高玉峰, 等. 中粗砂中吸力锚的负压沉贯模型试验研究[J]. 岩土工程学报, 2012, 34(12): 2277-2283. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201212022.htm

    LI Da-yong, ZHANG Yu-kun, et al. Model tests on penetration of suction anchors in medium-coarse sand[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(12): 2277-2283. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201212022.htm
    [2]
    ANDERSEN K, JOSTAD H. Shear strength along inside of suction anchor skirt wall in clay[J]. Die Psychiatrie, 2004, 6(4): 209-212.
    [3]
    RANDOLPH M F, HOUSE A R. Analysis of suction caisson capacity in clay[C]//Offshore Technology Conference, 2002, Houston, Texas.
    [4]
    HOULSBY G T, BYRNE B W, et al. Design procedures for installation of suction caissons in clay and other materials[J]. Geotechnical Engineering, 2005, 158: 135-144. doi: 10.3321/j.issn:1000-4548.2005.02.001
    [5]
    CHEN W, RANDOLPH M F. External radial stress changes and axial capacity for suction caissons in soft clay[J]. Géotechnique, 2015, 57(6): 499-511.
    [6]
    ZHOU M, HOSSAIN M S, HU Y, et al. Installation of stiffened caissons in nonhomogeneous clays[J]. Journal of Geotechnical & Geoenvironmental Engineering, 2016, 142(2): 04015079.
    [7]
    HOULSBY G T, BYRNE B W. Design procedures for installation of suction caissons in sand[J]. Geotechnical Engineering, 2005, 158(158): 135-144.
    [8]
    CHEN F, LIAN J J, WANG H J. Large-scale experimental investigation of the installation of suction caissons in silt sand[J]. Applied Ocean Research, 2016, 60: 109-120. doi: 10.1016/j.apor.2016.09.004
    [9]
    ZHU B, KONG D Q, CHEN R P, et al. Installation and lateral loading tests of suction caissons in silt[J]. Canadian Geotechnical Journal, 2011, 48(7): 1070-1084. doi: 10.1139/t11-021
    [10]
    ZHANG Y K, LI D Y, CHEN F Q. Experimental studies on sand plug formation in suction caisson during extraction[J]. Marine Georesources & Geotechnology, 2018: 1-10.
    [11]
    ZHANG Y K, LI D Y, GAO Y F. Model tests on installation and extraction of suction caissons in dense sand[J]. Marine Georesources & Geotechnology, 2016, 35(7): 921-929.
    [12]
    李大勇, 都浩, 孙宗军. 海底裙式吸力锚:中国,ZL200920239914.8[P]. 2010.
    [13]
    LI D Y, FENG L Y, ZHANG Y K. Model tests of modified suction caissons in marine sand under monotonic lateral combined loading[J]. Applied Ocean Research, 2014, 48: 137-147. doi: 10.1016/j.apor.2014.08.005
    [14]
    LI D Y, ZHANG Y K, FENG L Y, et al. Capacity of modified suction caissons in marine sand under static horizontal loading[J]. Ocean Engineering, 2015, 102: 1-16. doi: 10.1016/j.oceaneng.2015.04.033
    [15]
    LI D Y, ZHANG Y K, FENG L Y. Response of skirted suction caissons to monotonic lateral loading in saturated medium sand[J]. China Ocean Engineering, 2014, 28(4): 569-578. doi: 10.1007/s13344-014-0046-z
    [16]
    LI D Y, MA S L, ZHANG Y K. Undrained pullout capacity of modified suction caisson in clay by finite element limit analysis[J]. Marine Georesources & Geotechnology, 2017(1): 1-10.
    [17]
    ZHANG Y K, GAO Y F, LI D Y, et al. H-M bearing capacity of a modified suction caisson determined by using load-/displacement-controlled methods[J]. China Ocean Engineering, 2016, 30(6): 926-941. doi: 10.1007/s13344-016-0060-4
    [18]
    ZHANG Y K, LI D Y, GAO Y F. Earth pressures on modified suction caisson in saturated sand under monotonic lateral loading[J]. Journal of Renewable & Sustainable Energy, 2016, 8(5): 325-337.
    [19]
    ANDERSEN K, JOSTAD H. Foundation design of skirted foundations and anchors in clay[C]//Offshore Technology Conferences, 1999, Houston: 383-392.
  • Related Articles

    [1]ZHANG Han, YANG Shi-fei, WANG Lin, LIN Tian-xiang. Experimental researches on in-situ loading and unloading deformation characteristics of soft soil based on pressuremeter tests in Shanghai area[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(4): 769-777. DOI: 10.11779/CJGE202204021
    [2]ZOU De-gao, ZHAO Yang, XU Bin, KONG Xian-jing, WANG Qiang. Experimental study on residual deformation behaviors of municipal solid waste[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(4): 554.
    [3]YAN Peng, LU Wen-bo, CHEN Ming, ZHOU Chuang-bing. Effect of initial geo-stress dynamic unloading during tunnel excavation[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(12): 1888-1894.
    [4]ZOU Degao, MENG Fanwei, KONG Xianjing, XU Bin. Residual deformation behavior of rock-fill materials[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(6): 807-812.
    [5]JIA Gexu, KONG Xianjing. Study on residual deformation characteristics of coarse-grained soils[J]. Chinese Journal of Geotechnical Engineering, 2004, 26(1): 26-30.
    [6]ZHOU Jian, WANG Hao, CAI Hongying, HUANG Maosong. Pore pressure characteristic analysis of soft clay during unloading based on lab data and numerical calculation[J]. Chinese Journal of Geotechnical Engineering, 2002, 24(5): 556-559.
    [8]YOU Mingqing, SU Chengdong, XU Tao. Loading or unloading process in axial direction and Young’s modulus of rock specimen[J]. Chinese Journal of Geotechnical Engineering, 2001, 23(5): 588-592.
    [9]MA Wei, CHANG Xiaoxiao. Influence of loading and unloading on strength and deformation of frozen soil[J]. Chinese Journal of Geotechnical Engineering, 2001, 23(5): 563-566.
    [10]Cai Xiao hong, Lu You nian. Rock Resistant Factor "K" in Circular Pressure Tunnel by the Plastic Harding Theory[J]. Chinese Journal of Geotechnical Engineering, 1984, 6(3): 44-56.

Catalog

    Article views PDF downloads Cited by()
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return