[1]刘恒,余帅会,龚申,等.降雨作用下排水钉的性能及其对渗流场的影响[J].福建工程学院学报,2022,20(04):327-331.[doi:10.3969/j.issn.1672-4348.2022.04.004]
　LIU Heng,YU Shuaihui,GONG Shen,et al.Performance of drainage nail under rainfall and its influence on seepage fields[J].Journal of FuJian University of Technology,2022,20(04):327-331.[doi:10.3969/j.issn.1672-4348.2022.04.004]
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降雨作用下排水钉的性能及其对渗流场的影响()
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《福建工程学院学报》[ISSN:2097-3853/CN:35-1351/Z]

卷:
第20卷
期数:
2022年04期
页码:
327-331
栏目:
出版日期:
2022-08-25

文章信息/Info

Title:
Performance of drainage nail under rainfall and its influence on seepage fields
作者:
刘恒; 余帅会; 龚申; 聂如松
中土集团福州勘察设计研究院有限公司
Author(s):
LIU Heng;  YU Shuaihui;  GONG Shen;  NIE Rusong
CCECC Fuzhou Survey & Design Institue Co., Ltd.,
关键词:
降雨入渗; 排水钉; 排水量; 体积含水率; 孔隙水压力
Keywords:
rainfall infiltration;  drainage nail;  water drainage;  volumetric water content;  pore water pressure
分类号:
TU443
DOI:
10.3969/j.issn.1672-4348.2022.04.004
文献标志码:
A
摘要:
为探究降雨入渗作用下排水钉的排水性能及其对土体渗流场的影响，通过开展室内试验、建立排水钉数值模型、定义流量函数模拟降雨入渗过程，分析排水钉排水量及土体中体积含水率和孔隙水压力的变化规律。 结果表明:随着降雨时间的增加，排水钉排水量不断增大直至最大值，排水量处于最大值一段时间后，土体表面积水入渗完成，排水量开始大幅减小。 随着降雨入渗的发展，各监测点处体积含水率均达到土体饱和体积含水率，各处孔隙水压力值由负变正，降雨停止后，由于排水钉的排水作用，各处体积含水率均不断减小，最终，各监测点处体积含水率均小于初始状态，孔隙水压力值由正变负。 数值模拟结果能与室内试验结果具有良好的一致性。 研究结果说明排水钉具有良好的排水效果，可有效解决工程中降水的排出问题，能够为工程的排水设计提供借鉴。
Abstract:
In order to investigate the drainage performance of the drainage nail and its influence on the soil seepage field, laboratory tests were conducted so as to establish the numerical model of the drainage nail, and define the flow function to simulate the drainage infiltration process, and the drainage water volume and the changes of volumetric water content and pore water pressure in the soil were analyzed. Results show that the drainage water volume of the drainage nail increases to a maximum value as the rainfall time increases, then the drainage water volume keeps at its peak for a period of time; the drainage water volume decreases rapidly after a while owing to the completion of water infiltration on the soil surface. With the development of rainfall infiltration, the volumetric water content at each monitoring point reaches the saturated volumetric water content, and the pore water pressure changes from negative to positive. Due to the drainage effect of the nail, the volumetric water content at each monitoring point decreased continuously after the rainfall stopped. Finally, the volumetric water content at each monitoring point was smaller than the initial state, and the pore water pressure value changed from positive to negative. The numerical simulation results are consistent with the laboratory tests. Such results show that the drainage nail has good drainage effects, which can effectively solve the problem of drainage in engineering and provide reference for drainage design.

参考文献/References:

[1] 冷伍明, 谭敦枝, 赵春彦, 等. 一种用于铁路路基边坡的水钉排水系统：CN205474898U[P]. 2016-08-17.[2] 尹进. 边坡挡墙水钉高效排水技术综述[J]. 住宅与房地产, 2020（9）：215-216[3] 张素磊, 丰权章, 应国刚, 等. 公路隧道渗漏水成因及新型排水材料现场试验研究[J]. 公路交通科技, 2013, 30（10）：86-91, 140.[4] 姜旭荣, 涂欣华. 公路隧道渗漏水成因及新型排水材料现场试验分析[J]. 交通世界, 2019（21）：124-125, 127.[5] 冷伍明, 郭一鹏, 聂如松, 等. 一种新型排水结构及其排水性能初探[J]. 铁道学报, 2017, 39（7）：151-158.[6] 郭一鹏, 冷伍明, 聂如松, 等. 一种新型排水结构的排水性能试验研究[J]. 铁道学报, 2019, 41（4）：133-141.[7] 郭一鹏, 冷伍明, 杨奇, 等. 毛细透排水管排水渗流模型及设置间距研究[J]. 中国铁道科学, 2018, 39（4）：8-13. [8] 中华人民共和国水利部. 土工试验方法标准： GB／T 50123-2019 [S]. 北京：中国计划出版社, 2019.

更新日期/Last Update: 2022-08-25