Deformation characteristics of high-fill temporary storage yard foundation on complex soft soil
-
摘要: 依托某滨海复杂软土地基大型高填方临时堆场工程，通过开展软土地基孔隙水压力与变形的原位监测及有限元分析，研究了增设排水板工况下软土地基在高填方荷载作用下的固结和变形特性。结果表明：高填方过程中，场地整体稳定性及变形均满足设计控制要求；大面积高填方堆载作用下，地基土竖向变形与侧向变形主要集中在地表以下6.0 m深度范围内；排水板对超孔隙水压力的消散作用明显，可有效降低地基侧向土压力及变形量，从而减小对周边环境的扰动效应；与理论计算模型预测结果相比，实测的地基土变形影响仅在一定深度范围内较为明显。研究成果可为类似工程提供参考。Abstract: Based on a large-scale high-fill temporary storage yard project on a complex soft soil foundation in a coastal area, the consolidation and deformation characteristics of soft soil foundation under high-fill load were studied by conducting in-situ monitoring and finite element analysis of pore water pressure and deformation of soft soil foundation under the condition of adding drainage plates. The results indicate that during the high-filling process, the overall stability and deformation of the site meet the design control requirements; under the action of large-area high-fill pile load, the vertical and lateral deformations of the foundation soil are mainly concentrated within a depth range of 6.0 meters below the surface; the drainage plate has a significant dissipation effect on the excess pore water pressure, which can effectively reduce the lateral soil pressure and deformation of the foundation, thereby reducing the disturbance effect on the surrounding environment. Compared with the predicted results of theoretical calculation models, the measured deformation of foundation soil is only more significant within a certain depth range. The research results can provide a reference for similar projects.
-
Key words:
- high-fill storage yard /
- complex soft soil /
- in-situ monitoring /
- pore water pressure /
- deformation
-
表 1 场地各土层物理力学指标
土层 天然重度
γ/(kN·m−3)孔隙比
e黏聚力
c/kPa内摩擦角
φ/(°)压缩模量ES0.1-0.2/MPa 承载力特征值fak/kPa 杂填土① 17.0 8.0 10.0 2.5 60 淤泥② 15.7 1.672 6.8 3.8 2.4 45 砂质黏土③ 18.5 0.808 15.5 26.3 5.6 200 砂土状强风化凝灰岩④ 21.0 30.0 30.0 40.0 450 碎块状强风化凝灰岩⑤ 23.0 32.0 35.0 600 中等风化凝灰岩⑥ 24.0 100.0 40.0 2500 
下载: 导出CSV
-
[1] 吕延栋, 朱龙祥, 王 旭, 等. 电渗–堆载–化学灌浆联合处理淤泥质软土的试验研究[J]. 岩土工程学报,2021,43(S2):100-103. (LÜ Y D, ZHU L X, WANG X, et al. Experimental investigation on electro-osmosis-surcharge preloading-chemical grouting for silty soft soils[J]. Chinese Journal of Geotechnical Engineering,2021,43(S2):100-103. (in Chinese)LÜ Y D, ZHU L X, WANG X, et al. Experimental investigation on electro-osmosis-surcharge preloading-chemical grouting for silty soft soils[J]. Chinese Journal of Geotechnical Engineering, 2021, 43（S2）: 100-103. (in Chinese) [2] 薛 元, 崔维秀, 封志军, 等. 滇池地区铁路软土地基加固处理技术[J]. 铁道工程学报,2015,32(8):35-40. (XUE Y, CUI W X, FENG Z J, et al. The reinforcement technology of railway's soft soil foundation in Dian Lake area[J]. Journal of Railway Engineering Society,2015,32(8):35-40. (in Chinese)XUE Y, CUI W X, FENG Z J, et al. The reinforcement technology of railway's soft soil foundation in Dian Lake area[J]. Journal of Railway Engineering Society, 2015, 32（8）: 35-40. (in Chinese) [3] 王国辉, 陈文化, 聂庆科, 等. 深厚淤泥质土中基坑开挖对基桩影响的离心模型试验研究[J]. 岩土力学,2020,41(2):399-407. (WANG G H, CHEN W H, NIE Q K, et al. Impacts of pit excavation on foundation piles in deep silty soil by centrifugal model tests[J]. Rock and Soil Mechanics,2020,41(2):399-407. (in Chinese)WANG G H, CHEN W H, NIE Q K, et al. Impacts of pit excavation on foundation piles in deep silty soil by centrifugal model tests[J]. Rock and Soil Mechanics, 2020, 41（2）: 399-407. (in Chinese) [4] 唐钱龙, 李双龙, 魏丽敏, 等. 软土区堆载对桥梁桩基偏位影响及纠偏措施[J]. 土木与环境工程学报(中英文),2024,46(6):126-134. (TANG Q L, LI S L, WEI L M, et al. Influence of surcharge loads in soft soils on bridge pile foundation deviations and its correction measures[J]. Journal of Civil and Environmental Engineering,2024,46(6):126-134. (in Chinese)TANG Q L, LI S L, WEI L M, et al. Influence of surcharge loads in soft soils on bridge pile foundation deviations and its correction measures[J]. Journal of Civil and Environmental Engineering, 2024, 46（6）: 126-134. (in Chinese) [5] 陕 耀, 肖蔚雄, 马伟叁, 等. 软土地区钢套管钻孔灌注桩施工对临近高铁路基变形影响研究[J]. 铁道科学与工程学报,2023,20(7):2372-2384. (SHAN Y, XIAO W X, MA W S, et al. Influence of developed Benoto piling on deformation of adjacent high-speed railway subgrade in soft soil area[J]. Journal of Railway Science and Engineering,2023,20(7):2372-2384. (in Chinese)SHAN Y, XIAO W X, MA W S, et al. Influence of developed Benoto piling on deformation of adjacent high-speed railway subgrade in soft soil area[J]. Journal of Railway Science and Engineering, 2023, 20（7）: 2372-2384. (in Chinese) [6] 贾敏才, 刘 波, 周训军. 滨海含软土夹层粉细砂地基高能级强夯加固试验研究[J]. 建筑结构学报,2019,40(11):240-246. (JIA M C, LIU B, ZHOU X J. Field test study of high energy dynamic compaction on marine silty fine sand deposits with soft interlayers[J]. Journal of Building Structures,2019,40(11):240-246. (in Chinese)JIA M C, LIU B, ZHOU X J. Field test study of high energy dynamic compaction on marine silty fine sand deposits with soft interlayers[J]. Journal of Building Structures, 2019, 40（11）: 240-246. (in Chinese) [7] 李 威, 周春儿, 吴加武, 等. 重载堆场桩网复合地基离心模型试验与数值模拟研究[J]. 岩土工程学报,2022,44(S2):71-75. (LI W, ZHOU C E, WU J W, et al. Centrifugal model tests and numerical simulations of pile-net composite foundation for heavy-load storage yard[J]. Chinese Journal of Geotechnical Engineering,2022,44(S2):71-75. (in Chinese)LI W, ZHOU C E, WU J W, et al. Centrifugal model tests and numerical simulations of pile-net composite foundation for heavy-load storage yard[J]. Chinese Journal of Geotechnical Engineering, 2022, 44（S2）: 71-75. (in Chinese) [8] 夏梦然. 深基坑基底注浆加固效果数值模拟分析[J]. 土木与环境工程学报(中英文),2020,42(1):64-69. (XIA M R. Numerical simulation analysis of jet grouting effect of deep excavation bottom[J]. Journal of Civil and Environmental Engineering,2020,42(1):64-69. (in Chinese)XIA M R. Numerical simulation analysis of jet grouting effect of deep excavation bottom[J]. Journal of Civil and Environmental Engineering, 2020, 42（1）: 64-69. (in Chinese) [9] ZHANG R J, QIAO Y Q, ZHENG J J, et al. A method for considering curing temperature effect in mix proportion design of mass cement-solidified mud at high water content[J]. Acta Geotechnica,2021,16(1):279-301. doi: 10.1007/s11440-020-00961-5 [10] WANG D X, WANG H W, LARSSON S, et al. Effect of basalt fiber inclusion on the mechanical properties and microstructure of cement-solidified kaolinite[J]. Construction and Building Materials,2020,241:118085. doi: 10.1016/j.conbuildmat.2020.118085 [11] 石明生, 李禄禄, 夏洋洋, 等. 高聚物布袋桩加固淤泥质软土地基模型试验[J]. 铁道科学与工程学报,2020,17(9):2235-2242. (SHI M S, LI L L, XIA Y Y, et al. Model test of reinforcing silty soft soil with polymer bag grouting pile[J]. Journal of Railway Science and Engineering,2020,17(9):2235-2242. (in Chinese)SHI M S, LI L L, XIA Y Y, et al. Model test of reinforcing silty soft soil with polymer bag grouting pile[J]. Journal of Railway Science and Engineering, 2020, 17（9）: 2235-2242. (in Chinese) [12] 张 恒, 黄俊光, 毕俊伟. 增压式真空预压固结淤泥质软土的试验研究[J]. 长江科学院院报,2024,41(5):149-154. (ZHANG H, HUANG J G, BI J W. Experimental study on consolidation characteristics of mucky clay treated with air-booster vacuum preloading[J]. Journal of Changjiang River Scientific Research Institute,2024,41(5):149-154. (in Chinese)ZHANG H, HUANG J G, BI J W. Experimental study on consolidation characteristics of mucky clay treated with air-booster vacuum preloading[J]. Journal of Changjiang River Scientific Research Institute, 2024, 41（5）: 149-154. (in Chinese) -
图(10) / 表(1)
计量
- 文章访问数: 24
- HTML全文浏览量: 4
- PDF下载量: 8
- 被引次数: 0
