采用适于机械钻孔的圆形抗滑桩代替现行矩形抗滑桩,预制拱形挡土板,提出一种新型拱形板-桩墙支挡体系.在此基础上,根据桩间静力平衡和强度条件,建立圆形抗滑桩-拱形挡土板支挡体系合理桩间距确定方法,以及抗滑桩悬臂段弯矩与剪力计算公式.由抗滑桩间挡土板受力机制,构建考虑土拱效应的挡土板土压力计算方法.依托某高速铁路路堑边坡工程,将建立的设计方法应用于工程实例,并验证设计方法的可靠性.研究结果可为圆形抗滑桩-拱形挡土板支挡体系实际工程应用提供一定参考.
A new arched sheet-pile retaining wall was proposed by employing circular anti-slide piles, which are more suitable for mechanical drilling than rectangular piles used in current pile sheet retaining walls, and precast arch retaining plate. On this basis, based on the static equilibrium conditions and strength conditions between the anti-slip piles, and based on the soil arch effect, the method of determining the reasonable pile spacing of the new arched sheet-pile retaining wall support system was proposed. Moreover, the calculating formulae for the bending moment and shear force of the cantilever section of the anti-slip piles were derived. The equation of soil pressure of the retaining plate considering the soil arch effect was established by the force transfer mechanism of the retaining plate between the anti-slip piles. Based on a cutting slope along the high-speed railway in Northeast China, the above established design method was applied to an engineering example and the reliability of the design method was verified by numerical simulation. This study puts forward preliminary reference on the application of arched sheet-pile retaining wall in engineering.
[1] TEFERA T H, NORDAL S, GRANDE L, et al. Ground settlement and wall deformation from a large scale model test on a single strutted sheet pile wall in sand[J]. Int J Phys Model Geotech, 2006, 6(2): 1-13. DOI:10.1680/ijpmg.2006.060201.
[2] DIJCKMANS A, EKBLAD A, SMEKAL A, et al. Efficacy of a sheet pile wall as a wave barrier for railway induced ground vibration[J]. Soil Dyn Earthq Eng, 2016, 84: 55-69. DOI:10.1016/j.soildyn.2016.02.001.
[3] TIKANTA T, MATSUMOTO T, VU A T, et al. Fundamental experiments on a reinforcement method using sheet pile wall for bridge pile foundations subjected to pile embedment reduction and numerical validation[J]. Geotech Eng J SEAGS AGSSEA, 2017, 48(3): 25-39.
[4] OZPOLAT A, AKSOY H S, GOR M. Experimental and numerical modelling of deformations of a sheet pile wall near a foundation[J]. papers, 2018, 2(2/3): 731-736. DOI:10.1002/cepa.757.
[5] FALL M, GAO Z G, NDIAYE B C. Three-dimensional response of double anchored sheet pile walls subjected to excavation and construction sequence[J]. Heliyon, 2019, 5(3): e01348. DOI:10.1016/j.heliyon.2019.e01348.
[6] QU H L, WANG C X, ZHANG G L, et al. Seismic damage mechanism of bedrock and overburden layer slope reinforced by sheet pile wall[J]. J Geophys Eng, 2019, 16(4): 667-679. DOI:10.1093/jge/gxz032.
[7] 蒲建军,梁庆国,刘璐,等.桩及桩板墙加固路基边坡的对比室内模型试验研究[J].工程地质学报, 2017, 25(6): 1583-1592. DOI:10.13544/j.cnki.jeg.2017.06.022.
[8] 周成,陈伟志.基于变形状态控制的高速铁路路肩桩板墙设计探讨[J].高速铁路技术, 2018, 9(Suppl.2): 68-74.
[9] 白皓,杨智翔,梁栋,等.横向荷载下椅式桩板墙模型试验研究[J].工业建筑, 2018, 48(9): 111-116, 175. DOI:10.13204/j.gyjz201809018.
[10] 刘春刚.H形路堑桩板墙结构计算及支护效果分析[J].铁道建筑, 2017, 57(11): 82-85. DOI:10.3969/j.issn.1003-1995.2017.11.20.
[11] 周太平,刘春兰,白林,等.卸荷板式桩板墙在边坡中的应用研究[J].工程技术研究, 2020, 5(6): 28-29. DOI:10.19537/j.cnki.2096-2789.2020.06.012.
[12] LIU M L, CHEN X S, HU Z Z, et al. Active earth pressure of limited C-φ soil based on improved soil arching effect[J]. Appl Sci, 2020, 10(9): 3243. DOI:10.3390/app10093243.
[13] 凌贤长,邢文强,唐亮,等.圆形抗滑桩-拱形挡土板支挡性能与参数分析[J]. 哈尔滨工程大学学报, 2024, 45(3): 517-525. DOI:10.11990/jheu.202111015.
[14] 黄治云.抗滑桩桩间拱效应与桩板土压力研究[D].重庆: 重庆大学, 2014.
[15] 胡晓军,王建国.边坡加固工程中抗滑桩间距的确定[J].河海大学学报(自然科学版), 2007, 35(3): 330-333. DOI:10.3321/j.issn:1000-1980.2007.03.021.
[16] 周德培,肖世国,夏雄.边坡工程中抗滑桩合理桩间距的探讨[J].岩土工程学报, 2004, 26(1): 132-135. DOI:10.3321/j.issn:1000-4548.2004.01.025.
[17] 沈军.抗滑桩设计与滑坡治理有限元分析[D].太原:太原理工大学, 2007.
[18] 铁道部第二勘测设计院.抗滑桩设计与计算[S].中国铁道出版社, 1983.
[19] 卢凡.边坡安全防控装配式拱形板-桩墙性能分析与计算方法[D].哈尔滨:哈尔滨工业大学, 2021. DOI:10.27061/d.cnki.ghgdu.2021.004931.
[20] 屈林河.基于土拱效应的挂板式斜插桩板墙结构受力分析[D].昆明:云南大学, 2017.
[21] 叶晓明.柱板结构挡土墙板上的土压力计算方法[J].地下空间, 1999, 19(2):142-146.
[22] 吴才德,龚迪快,王洁栋.门架加锚杆复合结构在超大基坑中的应用研究[J].岩土工程学报, 2006, 28(Suppl.1): 1781-1784.
[23] 陈慧君.斜插桩板墙结构受力分析及设计方法研究[D].昆明:云南大学, 2018.
[24] 赵明华,陈耀浩,杨超炜.考虑土拱作用抗滑桩合理桩间距确定方法研究[J].岩土工程学报, 2015, 37(Suppl.2): 16-21. DOI:10.11779/CJGE2015S2004.
[25] 代军,胡岱文,吴曙光.桩锚支挡结构体系挡板土压力试验研究[J].重庆建筑大学学报, 2001, 23(4): 48-54. DOI:10.3969/j.issn.1674-4764.2001.04.009. (
