Security calculation method of steel sheet pile cofferdam based on incremental method
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摘要: 分析了现有的钢板桩计算理论, 计算了钢板桩围堰的土压力、静水压力、流水压力、波浪力与支撑力; 分析了钢板桩围堰的施工工序, 将钢板桩视为非线性弹性地基梁, 建立了基于增量法的非线性弹性地基梁挠曲微分方程, 计算了地基土水平抗力系数、钢板桩弯曲变形系数与内外荷载增量, 研究了钢板桩围堰各工况下受力与变形; 基于裕溪河大桥桥墩基础的钢板桩围堰, 验算了钢板桩围堰的内力、变形、强度、整体稳定性、抗倾覆安全性与抗隆起安全性。计算结果表明: 钢板桩最大位移为38.12 mm, 小于规范值80 mm; 钢板桩最大许用应力为168.60 MPa, 小于规范值218.52 MPa; 管桩最大许用应力为112.29 MPa, 小于规范值174.07 MPa; 钢板桩围堰整体稳定安全系数为2.8, 大于规范值1.3;4种工况下抗倾覆安全系数分别为3.4、2.8、2.9、1.9, 大于规范值1.2;根据普朗德尔理论与太沙基理论计算的抗隆起安全系数分别为3.1和3.5, 大于规范值1.6。可见, 基于增量法钢板桩围堰的安全性计算结果满足相关规范要求, 计算方法合理、可靠。Abstract: The existing calculation theories of steel sheet pile were analyzed, and the soil pressure hydrostatic pressure, flowing water pressure, wave pressure and supporting pressure acting on steel sheet pile cofferdam were calculated.The construction process of steel sheet pile cofferdam was analyzed, the steel sheet pile was taken as nonlinear elastic foundation beam, the nonlinear differential equations of elastic foundation beam were established based on the incremental method, the horizontal resistance coefficient of foundation soil, the bending deformation coefficient of steel sheet pile and the increments of internal and external loads of steel sheet pile cofferdam were calculated, and the forces and deformations of steel sheet pile under all conditions were studied.Based on the steel sheet pile cofferdam of Yuxi River Bridge, the internal force, deformation, strength, overall stability, anti-overturning safety, anti-uplift safety of steel sheet pile cofferdam were checked.Calculation result shows that the maximum displacement is 38.12 mm and less than the specification value of 80mm; the maximum allowable stress of steel sheet pile is 168.60 MPa and less than the specification value of 218.52MPa; the maximum allowable stress of pipe pile is112.29 MPa and less than the specification value of 174.07 MPa; the overall stability safety factor of steel sheet pile cofferdam is 2.8and greater than the specification value of 1.3;the antioverturning safety factors under 4cases are 3.4, 2.8, 2.9, 1.9respectively and greater than the specification value of 1.2;the anti-uplift safety coefficients based on Prandtl theory and Terzaghi theory are 3.1, 3.5respectively and greater than the specification value of 1.6.Obviously, the safety calculation results of steel sheet pile cofferdam based on the incremental method meet the requirements of the relevant specification, so the calculation method is reasonable and reliable.
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Key words:
- bridge engineering /
- steel sheet pile /
- cofferdam /
- safety of structure /
- incremental method /
- stability /
- safety
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[1] ALBANO M, MODONI G, CROCE P, et al. Assessment of the seismic performance of a bituminous faced rockfill dam[J]. Soil Dynamics and Earthquake Engineering, 2015, 75: 183-198. doi: 10.1016/j.soildyn.2015.04.005 [2] 王学武, 党发宁, 蒋力, 等. 深厚复杂覆盖层上高土石围堰三维渗透稳定性分析[J]. 水利学报, 2010, 41(9): 1074-1086. https://www.cnki.com.cn/Article/CJFDTOTAL-SLXB201009011.htmWANG Xue-wu, DANG Fa-ning, JIANG Li, et al. Threedimensional seepage stability analysis of high earth-rock cofferdam built on complex layer of deep coverage[J]. Shuili Xuebao, 2010, 41(9): 1074-1086. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-SLXB201009011.htm [3] HU Zhi-gen, FAN Xie, HUAI Wen-xin, et al. Coupling effect between reliability of bedding layer and stability of downstream concrete slab of overflow earth-rock cofferdam[J]. Journal of Hydrodynamics, 2007, 19(5): 613-622. doi: 10.1016/S1001-6058(07)60161-9 [4] 袁帅, 何蕴龙, 曹学兴. 非稳定渗流对托巴土石围堰上游坡稳定性影响[J]. 武汉大学学报: 工学版, 2012, 45(2): 193-199. https://www.cnki.com.cn/Article/CJFDTOTAL-WSDD201202013.htmYUAN Shuai, HE Yun-long, CAO Xue-xing. Influence of unsteady seepage on upstream slope stability of Tuoba earth-rock cofferdam[J]. Engineering Journal of Wuhan University: Engineering and Technology Edition, 2012, 45(2): 193-199. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-WSDD201202013.htm [5] ISOBE K, KIMURA M, OHTSUKA S. Design approach to a method for reinforcing existing caisson foundations using steel pipe sheet piles[J]. Soils and Foundations, 2014, 54(2): 141-154. doi: 10.1016/j.sandf.2014.02.006 [6] KIMURA M, INAZUMI S, TOO J K A, et al. Development and application of H-joint steel pipe sheet piles in construction of foundations for structures[J]. Soils and Foundations, 2007, 47(2): 237-251. doi: 10.3208/sandf.47.237 [7] 刘涛. 观音岩长江大桥桥墩钢围堰起吊[J]. 筑路机械与施工机械化, 2010, 27(8): 63-65. doi: 10.3969/j.issn.1000-033X.2010.08.025LIU Tao. Lifting of steel cofferdam for pier of guanyinyan yangtze river bridge[J]. Road Machinery and Construction Mechanization, 2010, 27(8): 63-65. (in Chinese). doi: 10.3969/j.issn.1000-033X.2010.08.025 [8] 尹骥, 魏建华, 李象范. 计算复合土钉支护变形的增量方法[J]. 岩土工程学报, 2007, 29(5): 755-759. doi: 10.3321/j.issn:1000-4548.2007.05.020YIN Ji, WEI Jian-hua, LI Xiang-fan. Increment method to calculate dispalcement of composite soil nailled wall[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(5): 755-759. (in Chinese). doi: 10.3321/j.issn:1000-4548.2007.05.020 [9] 邓子胜. 深基坑支护结构——土非线性共同作用弹性地基反力法[J]. 土木工程学报, 2006, 39(4): 68-72. doi: 10.3321/j.issn:1000-131X.2006.04.014DENG Zi-sheng. An elastic subgrade reaction method considering nonlinear interaction between protection-structure and soil for deep excavations[J]. China Civil Engineering Journal, 2006, 39(4): 68-72. (in Chinese). doi: 10.3321/j.issn:1000-131X.2006.04.014 [10] XIE Jin-rong, LI Ba-tong, CHEN Pi-hui, et al. Optimized design of larsen steel sheet pile supporting structure based on parameter sensitivity[J]. Applied Mechanics and Materials, 2014, 501-504: 770-776. doi: 10.4028/www.scientific.net/AMM.501-504.770 [11] 李仁民, 杨文俊. 深基坑浅嵌固钢板桩在红砂岩地质中的设计与应用[J]. 岩土工程学报, 2010, 32(增1): 493-498. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2010S1097.htmLI Ren-min, YANG Wen-jun. Design and application of lightly mounted steel sheet piles for deep foundation pits in red sandstone[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(S1): 493-498. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2010S1097.htm [12] GUI Jin-song, FU Yu, BI E K. The numerical calculation based on ABAQUS of lattice type steel sheet pile wharf structure[J]. Applied Mechanics and Materials, 2014, 501-504: 2107-2111. doi: 10.4028/www.scientific.net/AMM.501-504.2107 [13] BYFIELD M P, MAWER R W. Analysis of reduced modulus action in U-section steel sheet piles[J]. Journal of Constructional Steel Research, 2004, 60(3-5): 401-410. doi: 10.1016/S0143-974X(03)00119-6 [14] 张玉成, 杨光华, 姜燕, 等. 软土地区双排钢板桩围堰支护结构的应用及探讨[J]. 岩土工程学报, 2012, 34(增): 659-665. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2012S1130.htmZHANG Yu-cheng, YANG Guang-hua, JIANG Yan, et al. Application of retaining structure of steel sheet pile cofferdam in soft soil area[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(S): 659-665. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2012S1130.htm [15] 潘泓, 王加利, 曹洪, 等. 钢板桩围堰在不同施工工序下的变形及内力特性研究[J]. 岩石力学与工程学报, 2013, 32(11): 2316-2324. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201311019.htmPAN Hong, WANG Jia-li, CAO Hong, et al. Research on deformation and internal force characteristics of steel sheet pile cofferdam under different construction procedures[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(11): 2316-2324. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201311019.htm [16] LEFAS I D, GEORGIANNOU V N. Analysis of a cofferdam support and design implications[J]. Computers and Structures, 2001, 79(26-28): 2461-2469. doi: 10.1016/S0045-7949(01)00082-7 [17] 杜闯, 丁红岩, 张浦阳. 钢板桩围堰有限元分析[J]. 岩土工程学报, 2014, 36(增2): 159-164. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2014S2029.htmDU Chuang, DING Hong-yan, ZHANG Pu-yang, et al. Analysis of steel sheet pile cofferdam using finite element method[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(S2): 159-164. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2014S2029.htm [18] 刘芳, 张国庆, 蒋明镜, 等. 钢板桩挡墙主动土压力分布的形状效应[J]. 岩土力学, 2012, 33(增1): 315-320. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2012S1051.htmLIU Fang, ZHANG Guo-qing, JIANG Ming-jing, et al. Impact of sectional shape of steel sheet pile wall on active earth pressure[J]. Rock and Soil Mechanics, 2012, 33(S1): 315-320. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2012S1051.htm [19] 武崇福, 李玉, 张志军. 桩锚支护体系竖向土拱效应分析与桩后土压力计算[J]. 交通运输工程学报, 2014, 14(3): 24-33. http://transport.chd.edu.cn/article/id/201403004WU Chong-fu, LI Yu, ZHANG Zhi-jun. Vertical soil arch effect analysis and soil pressure calculation behind piles for pile-anchor supporting system[J]. Journal of Traffic and Transportation Engineering, 2014, 14(3): 24-33. (in Chinese). http://transport.chd.edu.cn/article/id/201403004 [20] MO Hai-hong, ZHOU Han-xiang. The optimal construction design of deep excavation[J]. Journal of South China University of Technology: Natural Science Edition, 2000, 28(12): 59-65. [21] 王加利. 钢板桩墙在不同施工工序下的变形及内力特性研究[D]. 广州: 华南理工大学, 2012.WANG Jia-li. Study on the deformation and internal force characteristics of steel sheet pile walls in different construction orders[D]. Guangzhou: South China University of Technology, 2012. (in Chinese). [22] AURICCHIO F, BALDUZZI G, LOVADIAN C. The dimensional reduction modelling approach for 3D beams: differential equations and finite-element solutions based on HellingerReissner principle[J]. International Journal of Solids and Structures, 2013, 50(25/26): 4184-4196. [23] 张庆, 王磊. 基于微分方程组的多排桩内力分析[J]. 吉林大学学报: 工学版, 2014, 44(5): 1327-1333. https://www.cnki.com.cn/Article/CJFDTOTAL-JLGY201405017.htmZHANG Qing, WANG Lei. Internal force analysis of multiple rows of piles based on differential equation set[J]. Journal of Jilin University: Engineering and Technology Edition, 2014, 44(5): 1327-1333. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-JLGY201405017.htm [24] 潘泓, 曹洪, 尹一鸣. 广州猎德大桥钢板桩围堰的设计与监测[J]. 岩石力学与工程学报, 2009, 28(11): 2242-2248. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX200911013.htmPAN Hong, CAO Hong, YIN Yi-ming. Design and monitoring of steel sheet pile cofferdams of Liede Bridge in Guangzhou[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(11): 2242-2248. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX200911013.htm [25] BERESLAVSKII E N. The flow of ground waters around a Zhukovskii sheet pile[J]. Journal of Applied Mathematics and Mechanics, 2011, 75(2): 210-217. [26] CRAWFORD R J, BYFIELD M P. A numerical model for predicting the bending strength of Larssen steel sheet piles[J]. Journal of Constructional Steel Research, 2002, 58(10): 1361-1374. [27] TRAVERS R, YEOW H C. Canary wharf crossrail station cofferdam, London, UK: design, construction and performance[J]. Geotechnical Engineering, 2014, 167(2): 169-181. [28] 李迎九. 钢板桩围堰施工技术[J]. 桥梁建设, 2011(2): 76-79, 84. https://www.cnki.com.cn/Article/CJFDTOTAL-QLJS201102018.htmLI Ying-jiu. Construction techniques of steel sheet pile cofferdams[J]. Bridge Construction, 2011(2): 76-79, 84. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-QLJS201102018.htm [29] 黄强. 建筑基坑支护技术规程应用手册[M]. 北京: 中国建材工业出版社, 2016.HUANG Qiang. Application Manual of Technical Specification for Retaining and Protection of Building Foundation Excavations[M]. Beijing: China Building Materials Press, 2016. (in Chinese). [30] 胡大琳, 王天利, 陈峰, 等. 半整体式桥台无伸缩缝桥静力分析[J]. 交通运输工程学报, 2006, 6(1): 52-62. http://transport.chd.edu.cn/article/id/200601011HU Da-lin, WANG Tian-li, CHEN Feng, et al. Static analysis of semi integral abutment jointless bridge[J]. Journal of Traffic and Transportation Engineering, 2006, 6(1): 52-62. (in Chinese). http://transport.chd.edu.cn/article/id/200601011 -
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