-
摘要: 为了研究黄土湿陷性对桥梁桩基承载力的影响, 基于弹性理论, 建立了黄土湿陷性影响下桥梁桩基承载力的力学模型, 推导了湿陷性黄土中桥梁桩基承载力的计算公式, 利用编制的计算程序, 分析了不同湿陷系数、不同湿陷厚度下黄土区域桩基承载力的变化性状。公式计算结果与现场实测结果对比分析表明, 其相对误差最小为5.2%, 最大为6.7%, 表明本文公式具有较好的实用性。Abstract: Based on elastic theory, a mechanics model of pile foundation bearing capacity was established, its calculating formula in collapsible loess was deduced, its changing characteristics for different collapsibility coefficients and different collapsibility thicknesses were analyzed.The comparison of calculation result and measuring result show that its minimum relative error is 5.2%, its maximum relative error is 6.7%, which indicate the model is feasible, the formula is practical.
-
图 1 桩的负摩阻力及中性点位置
Figure 1. Negative friction force of pile and location of neutral point
表 1 桩端荷载对比
Table 1. Comparison of pile end load
P/kN 800 1 600 2 400 3 200 4 000 4 800 5 600 6 400 7 200 8 000 8 800 Pb/kN 试验值 0.100 26.8 72.5 105.7 160.6 267.6 401.4 535.3 588.6 802.6 1 415.9 计算值 0.095 28.6 76.9 111.8 168.5 283.7 422.3 570.6 621.6 853.2 1 499.4 绝对误差 0.005 1.8 4.4 6.1 7.9 16.1 20.9 35.3 33.0 50.6 83.5 相对误差/% 5.0 6.7 6.1 5.8 4.9 6.0 5.2 6.6 5.6 6.3 5.9 说明: P为桩顶荷载, Pb为桩端阻力。 
下载: 导出CSV
-
[1] Feng Zhong-ju, Xie Yong-li. Simulation test of large-diameter bored hollow pile of prestressing force concrete[J]. Journal of Chang'an University(Natural Science Edition), 2005, 25(2): 50-54. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX202102014.htm [2] 冯忠居. 基础工程[M]. 北京: 人民交通出版社, 2001. [3] Feng Zhong-ju, Zhang Yong-qing, Li Jin. Study of displacement of bridge and abutment foundation caused by earth piling load and its prevention technique[J]. China Journal of Highway and Transport, 2004, 17(3): 74-77. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL202102002.htm [4] Feng Zhong-ju, Xie Yong-li, Li Zhe, et al. Bearing property of large-diameter over-length nonpacment[J]. Journal of Traffic and Transportation Engineering, 2005, 5(1): 24-27. (in Chinese) http://transport.chd.edu.cn/article/id/200501006 [5] Li Jin, Feng Zhong-ju, Xie Yong-li. Numerical simulation of large diameter hollow pile bearing performance[J]. Journal of Chang'an University(Natural Science Edition), 2004, 24(4): 36-39. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-DQXK201403009.htm [6] Feng Zhong-ju, Wei Wei. Bearing capacity of large diameter bored hollow pile of prestressing force concrete[J]. Journal of Chang'an University(Natural Science Edition), 2005, 25(3): 49-53. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC202202009.htm [7] Feng Zhong-ju, Xie Yong-li, Zhang Hong-guang, et al. Experimental study on effect of surface water on bearing capacity of pile foundation in loess area[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(15): 2 659-2 664. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX202103002.htm [8] Feng Zhong-ju, Xie Yong-li. Comprehensive analysis on influencing factors of bearing capacity of large diameter pile foundation for red bed in West Yunnan[J]. Chinese Journal of Geotechnical Engineering, 2005, 27(5): 540-544. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GLXB202105003.htm [9] JTJ 024-85, 公路桥涵地基与基础设计规范[S]. [10] Du Hai-zhen, Rong Jian-hua, Fu Jian-lin, et al. Structural topology optimization design based on strain energy[J]. Journal of Traffic and Transportation Engineering, 2004, 4(3): 34-37. (in Chinese) http://transport.chd.edu.cn/article/id/200403009 -
点击查看大图
图(9) / 表(1)
计量
- 文章访问数: 375
- HTML全文浏览量: 131
- PDF下载量: 364
- 被引次数: 0
