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Experimental study of sheet pile wharf based on distributed optical fiber monitoring technology
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摘要: 板桩码头桩体结构受力变形状态是评价其安全运行的重要指标。基于分布式光纤模型试验，提出了一种新型桩体受力和变形分布式监测技术，并成功应用于板桩码头钢筋混凝土灌注桩原型试验研究中。结果表明该方法能够准确反映港池开挖过程中板桩码头桩体结构变形、弯矩和受力等分布变化规律，并能及时对板桩码头的运行及施工情况进行有效监测评估，可以为板桩码头的持续稳定运行提供安全保障及施工指导。该监测技术能够克服传统点式监测方法分辨率及准确度不足的缺点，实现桩长范围内全深度及施工过程全周期的实时监测，具有一定的工程实用价值。Abstract: The stress and deformation state of the sheet pile wharf is an important factor to evaluate its safe operation. This paper presents a new distributed optical fiber monitoring technology for stress and deformation of piles based on the model test, which has been successfully applied to the prototype test of reinforced concrete cast-in-situ piles for sheet pile wharf. The results show that this method can accurately reflect the distribution of deformation, bending moment and stress along the pile length during the whole process of harbor basin excavation. It can effectively monitor and evaluate the operation and construction conditions in time, which can provide safety guarantee and construction guidance for the continuous stable operation of the sheet pile wharf. This monitoring method can realize the real-time monitoring for pile structure in full depth and full period of construction, thereby overcoming the shortcomings of traditional point monitoring methods in terms of resolution and accuracy, which has certain engineering practical significance.
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表 1 地基土层主要物理力学参数
Table 1. Physical and mechanical parameters of foundation soil layer
层号 土层名称 厚度/m 含水率/% 土重度/
（kN·m−3）孔隙比 压缩性 强度指标 a0.1-0.2 /MPa−1 Es0.1-0.2 /MPa Ccq /kPa φcq /° 1 冲填土 2.20~5.20 2-1 淤泥质粉质黏土混粉砂 2.00~5.60 41.3 17.6 1.174 0.76 3.00 13.7 7.4 2-2 粉砂夹粉质黏土 1.20~8.20 30.8 19.0 0.842 0.24 7.85 6.6 26.2 3 粉砂夹粉土 2.40~6.20 27.2 19.5 0.747 0.14 12.96 4.6 30.6 4 粉土夹粉质黏土 6.50~13.40 32.1 18.4 0.926 0.34 5.92 12.1 21.9 5 粉砂夹粉土 5.90~11.10 28.1 19.4 0.772 0.18 10.16 7.0 28.6 6 粉砂 2.30~5.20 25.7 20.2 0.667 0.11 15.56 2.3 33.9 7 粉砂夹粉土 9.70~20.10 27.3 19.7 0.731 0.13 13.94 4.3 31.2 
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[1] 刘永绣. 板桩式岸壁结构的设计理论与方法[M]. 北京: 人民交通出版社股份有限公司, 2014: 1-20. LIU Yongxiu. Design theories and methods for sheet-pile bulkhead[M]. Beijing: China Communications Press Co., Ltd., 2014: 1-20. （in Chinese） [2] 徐光明, 任国峰, 顾行文, 等. 新型板桩码头群桩基础被动段桩侧压力试验研究[J]. 岩土工程学报,2018,40(3):502-511. (XU Guangming, REN Guofeng, GU Xingwen, et al. Experimental study on lateral pile-soil pressure on passive part of pile groups in innovative sheet-pile wharf[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(3): 502-511. (in Chinese) doi: 10.11779/CJGE201803014 [3] 徐光明, 任国峰, 顾行文, 等. 盐城港卸荷式地连墙结构码头离心模型试验[J]. 水利水运工程学报,2018(3):48-56. (XU Guangming, REN Guofeng, GU Xingwen, et al. Centrifuge modeling of diaphragm wall wharf with relief platform at Yancheng port[J]. Hydro-Science and Engineering, 2018(3): 48-56. (in Chinese) [4] 徐光明, 蔡正银, 曾友金, 等. 一种新型板桩码头结构的离心模拟[J]. 岩土力学,2010,31(增刊1):48-52. (XU Guangming, CAI Zhengyin, ZENG Youjin, et al. Centrifuge modeling for an innovative sheet-pile bulkhead of diaphragm[J]. Rock and Soil Mechanics, 2010, 31(Suppl1): 48-52. (in Chinese) [5] 徐光明, 李士林. 板桩码头中群桩基础联接型式的试验研究[J]. 岩石力学与工程学报,2016,35(增刊1):3365-3371. (XU Guangming, LI Shilin. Experimental study of head fixity conditions of pile group in sheet-pile bulkhead[J]. Chinese Journal of Rock Mechanics and Engineering, 2016, 35(Suppl1): 3365-3371. (in Chinese) [6] 李景林, 蔡正银, 徐光明, 等. 遮帘式板桩码头结构离心模型试验研究[J]. 岩石力学与工程学报,2007,26(6):1182-1187. (LI Jinglin, CAI Zhengyin, XU Guangming, et al. Centrifuge modelling test on covered sheet-piled structure of wharf[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(6): 1182-1187. (in Chinese) doi: 10.3321/j.issn:1000-6915.2007.06.012 [7] 张昊, 邓永锋, 刘夫江, 等. 遮帘式板桩码头结构土压力特性模型试验研究[J]. 东南大学学报(自然科学版),2015,45(6):1175-1179. (ZHANG Hao, DENG Yongfeng, Liu Fujiang, et al. Model experiment study on soil pressure characteristics of sheet-pile barrier wharf structure[J]. Journal of Southeast University (Natural Science Edition), 2015, 45(6): 1175-1179. (in Chinese) doi: 10.3969/j.issn.1001-0505.2015.06.027 [8] 邹鹏旭, 丁建军, 王馨. 钢管板桩结构影响因素数值模拟分析[J]. 港工技术,2018,55(6):56-60. (ZOU Pengxu, DING Jianjun, WANG Xin. Numerical simulation analysis on influence factors of steel tubular and sheet pile structure[J]. Port Engineering Technology, 2018, 55(6): 56-60. (in Chinese) [9] 施忠良. 遮帘式板桩码头力学性能分析[J]. 水运工程,2019(7):86-92. (SHI Zhongliang. Mechanical properties analysis of covered type of sheet pile wharf[J]. Port & Waterway Engineering, 2019(7): 86-92. (in Chinese) doi: 10.3969/j.issn.1002-4972.2019.07.016 [10] 焦志斌, 蔡正银, 王剑平, 等. 遮帘式板桩码头原型观测技术研究[J]. 港工技术,2005(增刊1):56-59. (JIAO Zhibin, CAI Zhengyin, WANG Jianping, et a1. Study on prototype observation technique of semi-covered type of sheet pile[J]. Port Engineering Technology, 2005(Suppl1): 56-59. (in Chinese) [11] 焦志斌, 刘永绣. 地下连续墙测试中弯矩的计算方法探[J]. 岩土工程学报,2006,28(增刊1):1485-1488. (JIAO Zhibin, LIU Yongxiu. Calculation methods of bending moment in diaphragm wall tests[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(Suppl1): 1485-1488. (in Chinese) [12] 郭继业, 周宝江, 范建兵. 遮帘式板桩码头结构原位测试研究[J]. 港工技术,2012,49(1):47-50. (GUO Jiye, ZHOU Baojiang, FAN Jianbing. In-situ measuring research on covered type sheet pile wharf structure[J]. Port Engineering Technology, 2012, 49(1): 47-50. (in Chinese) doi: 10.3969/j.issn.1004-9592.2012.01.014 [13] 许滨华, 何宁, 何斌, 等. 基于分布式光纤传感器的管道受弯变形监测试验研究[J]. 仪器仪表学报,2019,40(8):20-30. (XU Binhua, HE Ning, HE Bin, et al. Experiment study on pipeline bending deformation monitoring based on distributed optical fiber sensor[J]. Chinese Journal of Scientific Instrument, 2019, 40(8): 20-30. (in Chinese) [14] 何斌, 何宁, 许滨华, 等. 混凝土面板堆石坝面板挠度分布式监测试验[J]. 岩土工程学报,2020,42(5):837-844. (HE Bin, HE Ning, XU Binhua, et al. Tests on distributed monitoring of deflection of concrete faces of CFRDs[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(5): 837-844. (in Chinese) [15] DGSI. Digitilt classic inclinometer system specifications[EB/OL]. [2020-11-01] https://durhamgeo.com/product/digitilt-classic-inclinometer-system. [16] Specifications of digital inclinometer model GK-604D[EB/OL]. [2020-11-01] https://www.geokon.com/GK-604D. -
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