›› 2016, Vol. 37 ›› Issue (S1): 477-481.doi: 10.16285/j.rsm.2016.S1.062

• 岩土工程研究 • 上一篇    下一篇

输电线路装配式基础下压计算时底面积取值研究

程永锋,郑卫锋,鲁先龙,孟宪政   

  1. 中国电力科学研究院,北京 100192
  • 收稿日期:2015-11-19 出版日期:2016-06-16 发布日期:2018-06-09
  • 通讯作者: 郑卫锋,男,1977年生,博士,高级工程师,主要从事电力工程地基基础研究工作。E-mail:zhengwf@epri.sgcc.com.cn E-mail:cyf@epri.sgcc.com.cn
  • 作者简介:程永锋,男,1969年生,博士,教授级高级工程师,主要从事输变电工程地基基础及电网防灾减灾技术的研究工作。
  • 基金资助:
    国家电网公司科技项目(No. GCB17201500141)。

Research on criteria to define bottom area of assembled foundation of transmission line in calculation of compressive load

CHENG Yong-feng, ZHENG Wei-feng, LU Xian-long, MENG Xian-zheng   

  1. China Electric Power Research Institute, Beijing 100192, China
  • Received:2015-11-19 Online:2016-06-16 Published:2018-06-09
  • Supported by:
    This work was supported by the scientific and technological project in State Grid Corporation of China(GCB17201500141).

摘要: 输电线路混凝土板条与角钢支架组合的装配式基础已在工程中得到应用,由于底板板条间存在空隙,基础在下压计算时底板面积取值尚不明确。通过地基土极限承载力理论分析,相邻板条间存在土拱效应,可将整个底板下的浅层土体近似等效为刚性体共同抵抗下压荷载。不同板条间距的现场试验表明,板条间距变化对荷载位移曲线基本无影响,板条下与空隙处的土压力差值在3倍底板宽度埋深时差距较小,在5倍底板宽度埋深时差别可忽略,且由于应力扩散作用板条间距变化对深层土压力无影响。根据理论研究与现场试验成果,建议装配式基础在下压计算时底板计算原则应按照底板板条包围的整体面积进行计算。

关键词: 输电线路, 装配式基础, 混凝土板条, 下压承载计算, 现场试验

Abstract: The assembled foundation for transmission line, which is composed of concrete laths and angle steel scaffolds, has been applied to practice. Due to the gap of laths, the bottom area of the foundation is not clearly defined when calculating the compressive load. Theoretical research on the ultimate bearing capacity of foundation indicates that soil arching effect exists between the adjacent slabs. The shallow soil under the slab of assembled foundation can be approximately equivalent to a rigid body, which resists the compressive load together with the slabs as a whole. The in-site experiments at different lath intervals testify that the difference of soil pressures under the laths and at the gap of laths is relatively large in the shallow soil. But the soil pressures are basically the same in the deep layer where the change of the lath interval has no significant impact on soil pressure. The difference value between soil pressure under the laths and that at the gap of laths is small in the position of 3times laths width. And the difference value can be neglected in the position 5 times laths width. The research result suggests that the whole area surrounded by the laths is preferable in the calculation of compressive load on the assembled foundation composed of concrete laths.

Key words: transmission line, assembled foundation, concrete lath, calculation of compressive load, in-site experiment

中图分类号: 

  • TU 528
[1] 张晓磊, 冯世进, 李义成, 王雷, . 路基高架过渡段高铁运行引起的地表 振动现场试验研究[J]. 岩土力学, 2020, 41(S1): 187-194.
[2] 李任融, 孔纲强, 杨庆, 孙广超. 流速对桩−筏基础中能量桩换热效率 与热力耦合特性影响研究[J]. 岩土力学, 2020, 41(S1): 264-270.
[3] 陆晨凯, 孔纲强, 孙广超, 陈斌, 殷高翔, . 桩−筏基础中能量桩热−力耦合特性现场试验[J]. 岩土力学, 2019, 40(9): 3569-3575.
[4] 冯君, 王洋, 吴红刚, 赖冰, 谢先当, . 玄武岩纤维复合材料土层锚杆抗拔性能 现场试验研究[J]. 岩土力学, 2019, 40(7): 2563-2573.
[5] 吴爽爽, 胡新丽, 龚辉, 周昌, 徐楚, 王强, 应春业, . 3种模式下钻孔灌注桩桩-土剪切特性 现场试验研究[J]. 岩土力学, 2019, 40(7): 2838-2846.
[6] 余 瑜, 刘新荣, 刘永权, . 基坑锚索预应力损失规律现场试验研究[J]. 岩土力学, 2019, 40(5): 1932-1939.
[7] 李 驰, 王 硕, 王燕星, 高 瑜, 斯日古楞, . 沙漠微生物矿化覆膜及其稳定性的现场试验研究[J]. 岩土力学, 2019, 40(4): 1291-1298.
[8] 王钦科, 马建林, 胡中波, 王 滨, . 浅覆盖层软质岩中抗拔桩承载特性现场试验研究[J]. 岩土力学, 2019, 40(4): 1498-1506.
[9] 信亚雯, 周志芳, 马 筠, 李鸣威, 陈 朦, 汪 姗, 胡尊乐, . 基于现场双管试验确定弱透水层水力参数的方法[J]. 岩土力学, 2019, 40(4): 1535-1542.
[10] 任连伟, 孔纲强, 郝耀虎, 刘汉龙, . 基于能量桩现场试验的土体综合热导率系数研究[J]. 岩土力学, 2019, 40(12): 4857-4864.
[11] 崔光耀, 祁家所, 王明胜, . 片理化玄武岩隧道围岩大变形控制现场试验研究[J]. 岩土力学, 2018, 39(S2): 231-237.
[12] 王炳龙,梅 祯,肖军华. 土工格室补强路基整治路基病害的试验研究[J]. , 2018, 39(S1): 325-332.
[13] 郭 飞,陶连金,孔 恒,马红红,张丽丽,张新全,. 兰州砂卵石地层盾构施工振动传播及衰减特性分析[J]. , 2018, 39(9): 3377-3384.
[14] 喻豪俊,彭社琴,赵其华,. 碎石土斜坡水平受荷桩承载特性研究[J]. , 2018, 39(7): 2537-2545.
[15] 王翔鹰,陈育民,江 强,刘汉龙, . 抗液化排水刚性桩沉桩过程的土压力响应[J]. , 2018, 39(6): 2184-2192.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!