桩间黄土卸荷湿陷过程中卸荷量计算方法初探

doi:10.16285/j.rsm.2021.1904

岩土力学 ›› 2022, Vol. 43 ›› Issue (9): 2399-2409.doi: 10.16285/j.rsm.2021.1904

桩间黄土卸荷湿陷过程中卸荷量计算方法初探

金鑫¹，王铁行²，郝延周³，赵再昆²，张亮²，张猛¹

1. 西安工业大学建筑工程学院，陕西西安 710021；2. 西安建筑科技大学土木工程学院，陕西西安 710055； 3. 河南城建学院土木与交通工程学院，河南平顶山 467036

收稿日期:2021-11-10 修回日期:2022-05-06 出版日期:2022-09-12 发布日期:2022-09-12
作者简介:金鑫，男，1988年生，博士研究生，主要从事黄土、冻土工程设计理论和方法等方面的科研工作。
基金资助:
陕西省科技厅自然科学基础研究计划项目（No.2021JQ-644）；陕西省教育厅科研计划项目（No.21JK0672；No.21JK0689）。

Preliminary study of unloading calculation method in the unloading collapse process of loess between piles

JIN Xin¹, WANG Tie-hang², HAO Yan-zhou³, ZHAO Zai-kun ², ZHANG Liang², ZHANG Meng¹

1. School of Civil & Architecture Engineering, Xi’an Technological University, Xi’an, Shaanxi 710021, China; 2. College of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an, Shaanxi 710021, China; 3. School of Civil and Transportation Engineering, Henan University of Urban Construction, Pingdingshan, Henan 467036, China

Received:2021-11-10 Revised:2022-05-06 Online:2022-09-12 Published:2022-09-12
Supported by:
This work was supported by the Natural Science Program of Shaanxi Science and Technology Department (2021JQ-644) and the Scientific Research Program of Shaanxi Education Department(21JK0672, 21JK0689).

摘要/Abstract

摘要： 为确定桩间黄土卸荷湿陷过程中卸荷量的合理取值，开展桩−土界面大型剪切试验，研究桩间黄土卸荷湿陷状态下桩−土界面剪切强度、剪切位移及桩−土界面法向力之间的相关关系。结果表明：在桩间土中性点深度范围内，不同竖向应力和含水率状态下的桩−土界面剪切强度可代表桩侧负摩阻力。利用卸荷量与桩侧负摩阻力互为作用力与反作用力的力学原理，并在分析卸荷量随湿陷深度和湿陷进程变化规律的基础上，提出黄土卸荷湿陷过程中卸荷量计算方法，通过对比卸荷量计算值与不同黄土地区桩侧负摩阻力现场实测值，以验证其合理性。该方法不仅为科学评价黄土卸荷湿陷特性提供卸荷作用量化手段，还为相关黄土工程的优化设计提供理论参考依据。

关键词: 卸荷湿陷, 湿陷性黄土, 湿陷性, 湿陷过程

Abstract: To investigate the proper value of unloading in the unloading collapse process of loess between piles, a correlation between pile-soil interface shear strength, shear displacement, and pile-soil interface normal force under collapse was studied by interface shear test. In the range of neutral points, the results indicate that the shear strength of the pile-soil interface under different vertical stresses and water contents can represent the pile side negative friction resistance. Using the mechanical principle of the mutual action and reaction force between the unloading amount and the negative frictional resistance, we proposed a method to calculate the unloading amount based on the unloading variation laws during loess collapse. The rationality of proposed method is verified via the comparison between the calculated unloading values and the field measured results of pile side negative friction resistance in different loess areas. This method provides a quantitative means of unloading effect to promote loess unloading collapse evaluation and optimize the relevant loess engineering design theory.

Key words: unloading collapse, collapsible loess, collapse potential, collapse process

中图分类号: TU411

金鑫, 王铁行, 郝延周, 赵再昆, 张亮, 张猛, . 桩间黄土卸荷湿陷过程中卸荷量计算方法初探[J]. 岩土力学, 2022, 43(9): 2399-2409.

JIN Xin, WANG Tie-hang, HAO Yan-zhou, ZHAO Zai-kun, ZHANG Liang, ZHANG Meng, . Preliminary study of unloading calculation method in the unloading collapse process of loess between piles[J]. Rock and Soil Mechanics, 2022, 43(9): 2399-2409.

参考文献

相关文章 15

[1]	樊培培, 张凌凯, 丁旭升, . 干湿-冻融循环条件下湿陷性黄土剪切及压缩特性的劣化规律[J]. 岩土力学, 2024, 45(7): 2050-2060.
[2]	高常辉, 杜广印, 刘松玉, 庄仲旬, 杨泳, 何欢, . 深层振动密实对湿陷性黄土层水平应力变化的影响[J]. 岩土力学, 2022, 43(2): 519-527.
[3]	唐国艺, 刘智, 刘争宏, 唐立军, 于永堂, 姜文, . 低能级强夯在安哥拉Quelo砂中的应用[J]. 岩土力学, 2019, 40(S1): 203-209.
[4]	朱彦鹏, 杜晓启, 杨校辉, 栗慧王君, . 挤密桩处理大厚度自重湿陷性黄土地区综合管廊地基及其工后浸水试验研究[J]. 岩土力学, 2019, 40(8): 2914-2924.
[5]	王铁行, 金鑫, 罗扬, 张松林. 考虑卸荷作用的黄土湿陷性评价方法研究[J]. 岩土力学, 2019, 40(4): 1281-1290.
[6]	安鹏，张爱军，邢义川，倪万魁，张博,. 伊犁深厚湿陷性黄土浸水入渗及沉降变形特征分析[J]. , 2017, 38(2): 557-564.
[7]	黄雪峰，杨校辉，殷鹤，刘自龙，周俊鹏,. 湿陷性黄土场地湿陷下限深度与桩基中性点位置关系研究[J]. , 2015, 36(S2): 296-302.
[8]	牛亚强，王旭，郑静，蒋代军，刘德仁，蒋鹏程 , . 侧向约束防渗路基新结构防渗效果试验研究[J]. , 2015, 36(S2): 252-258.
[9]	梅源，胡长明，魏弋峰，张文萃，袁一力，王雪艳 , . Q2、Q3黄土深堑中高填方地基变形规律离心模型试验研究[J]. , 2015, 36(12): 3473-3481.
[10]	王端端，周志军，吕彦达，魏进. 湿陷性黄土中成孔方式对桩基承载力影响试验研究[J]. , 2015, 36(10): 2927-2933.
[11]	姚志华，黄雪峰 , 陈正汉，方祥位，苗强强，张江水，. 关于黄土湿陷性评价和剩余湿陷量的新认识[J]. , 2014, 35(4): 998-1006.
[12]	黄雪峰，杨校辉，. 湿陷性黄土现场浸水试验研究进展[J]. , 2013, 34(S2): 222-228.
[13]	张世径，黄雪峰，朱彦鹏，杨校辉，姚志华 . 大厚度自重湿陷性黄土地基处理深度和剩余湿陷量问题的合理控制[J]. , 2013, 34(S2): 344-350.
[14]	王小军，王文笛，李明，魏永梁，杨印海，屈耀辉，. Ⅳ级自重湿陷性黄土区客运专线铁路路堤处理地基的现场试验研究[J]. , 2013, 34(S2): 318-324.
[15]	方祥位，申春妮，李春海，汪龙，刘厚健，. 陕西蒲城Q2黄土湿陷变形特性研究[J]. , 2013, 34(S2): 115-120.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

桩间黄土卸荷湿陷过程中卸荷量计算方法初探

Preliminary study of unloading calculation method in the unloading collapse process of loess between piles

PDF (Chinese)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

本文评价

推荐阅读 0