| 桩间黄土卸荷湿陷过程中卸荷量计算方法初探 |
| |
| 引用本文： | 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. |
| |
| 作者姓名： | 金鑫 王铁行 郝延周 赵再昆 张亮 张猛 |
| |
| 作者单位： | 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 |
| |
| 基金项目： | 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）。 |
| |
| 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 |
| 收稿时间： | 2021-11-10 |
| 修稿时间： | 2022-05-06 |
Preliminary study of unloading calculation method in the unloading collapse process of loess between piles |
| |
| 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. |
| |
| Authors: | JIN Xin WANG Tie-hang HAO Yan-zhou ZHAO Zai-kun ZHANG Liang ZHANG Meng |
| |
| Institution: | 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 |
| |
| 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. |
| |
| Keywords: | unloading collapse collapsible loess collapse potential collapse process |
|
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
