动水头作用下花岗岩风化土的内部侵蚀机理

王浩; 严耿明; 李传东; 豆红强

doi:10.13961/j.cnki.stbctb.2024.02.009

您当前的位置：

首页 >

文章列表页 >

动水头作用下花岗岩风化土的内部侵蚀机理

试验研究

- 动水头作用下花岗岩风化土的内部侵蚀机理
- Internal Erosion Mechanism of Weathered Granite Soil Under Changing Hydrodynamic Head
- 水土保持通报 2024年44卷第2期页码：80-90
- 作者机构：
  
  1. 福州大学紫金地质与矿业学院,福建,福州,350108
  2. 福州大学土木工程学院,福建,福州,350108
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目“花岗岩二元结构边坡中差异风化界面的黏粒集聚特征及其触滑机制研究”(41972268)，“闽台高植被覆盖区台风暴雨型滑坡孕灾环境、成灾机制与动态预警”(U2005205);福建省科技厅项目(2022Y4002);福建省交通运输科技项目(202202);自然资源部丘陵山地地质灾害防治重点实验室自主课题(KLGHZ202105)
- DOI：10.13961/j.cnki.stbctb.2024.02.009
  中图分类号： S157.1;TU443
- 纸质出版：2024
- 稿件说明：
移动端阅览
王浩, 严耿明, 李传东, 等. 动水头作用下花岗岩风化土的内部侵蚀机理[J]. 水土保持通报, 2024,44(2):80-90.

Wang Hao, Yan Gengming, Li Chuandong, et al. Internal Erosion Mechanism of Weathered Granite Soil Under Changing Hydrodynamic Head[J]. Bulletin of Soiland Water Conservation, 2024, 44(2): 80-90.
王浩, 严耿明, 李传东, 等. 动水头作用下花岗岩风化土的内部侵蚀机理[J]. 水土保持通报, 2024,44(2):80-90. DOI： 10.13961/j.cnki.stbctb.2024.02.009.

Wang Hao, Yan Gengming, Li Chuandong, et al. Internal Erosion Mechanism of Weathered Granite Soil Under Changing Hydrodynamic Head[J]. Bulletin of Soiland Water Conservation, 2024, 44(2): 80-90. DOI： 10.13961/j.cnki.stbctb.2024.02.009.

摘要

[目的] 揭示动水头作用下花岗岩风化土侵蚀演化的动态过程，研究动态水力条件对土体内部侵蚀发展的影响，探明颗粒迁移规律与内部侵蚀机理，为深入研究花岗岩边坡的破坏模式与促滑机理提供理论依据。 [方法] 设计竖向土柱渗流装置，开展上升水头与正弦水头条件下花岗岩风化土柱的渗流试验，基于渗流土柱顶面与侧面的试验现象，从渗流速度变化、颗粒流失量变化和渗流前后颗粒级配、质量变化等方面，分析动水头作用下花岗岩风化土内部侵蚀的发育特征。 [结果] ①花岗岩风化土粒径差异较大，在骨架间存在微小孔隙，渗流冲刷作用使得土颗粒通过土体骨架间的孔隙运移流失。在内部侵蚀过程中，细颗粒流失量相对较多，粗颗粒流失量较少。 ②土体内部侵蚀作用是渐进发展的过程，在土体薄弱区域的结构最先产生变形与破坏。试验中渗流泉眼由土柱边界开始发展到土柱中部区域，渗流通道沿着渗流方向自下而上发育，水力条件短时间内发生显著变化会造成渗流通道快速贯通。 ③土体内部侵蚀作用将随渗流时间推进而趋于稳定，但正弦水头将“激活”土颗粒运动，加剧土体的内部侵蚀作用。加大水头变化幅度或减小水头变化周期，能够加剧土体内部侵蚀作用，导致水流运移速度加快以及颗粒迁移流失量增多。 [结论] 水力条件变化对土体内部侵蚀作用存在显著影响，正弦水头更能加剧颗粒迁移流失。

Abstract

[Objective] The dynamic process of erosion evolution of granite weathered soil under the action of changing hydrodynamic head was determined to study the influence of dynamic hydraulic conditions on the development of internal erosion of soil

and to define the particle migration law and internal erosion mechanism

in order to provide a theoretical basis for the in-depth study of the destruction mode and slip-promoting mechanism of granite slopes. [Methods] A vertical soil column seepage device was designed to carry out seepage tests on granite-weathered soil columns under rising hydrodynamic head and sinusoidal head conditions. Based on the test observations at the top and sides of the seepage soil columns

the developmental characteristics of the internal erosion of granite weathered soils under the action of changing hydrodynamic head were analyzed in terms of the changes in seepage velocity

the amount of soil particles lost

particle gradation

and quality of the particles before and after seepage. [Results] ① Granite-weathered soil had large differences in particle size

and there were small pores in the soil matrix. Seepage and scouring effects transported soil particles through the pores in the soil matrix. The amount of fine particles lost through internal erosion was relatively large

and the amount of coarse particles lost was small. ② Internal erosion was a gradual development process

and the soil structure in the weak areas of the soil was the first to exhibit deformation and damage. In the test

the seepage springs progressed from the boundary of the soil column to the middle area of the soil column

and the seepage channels developed from bottom to top along the seepage direction. Significant changes in the hydraulic conditions within a short period of time resulted in rapid penetration of the seepage channels. ③ Internal soil erosion will stabilize with seepage time

but a sinusoidal hydrodynamic head will activate the movement of soil particles and intensify internal soil erosion. Increasing the magnitude or decreasing the period of the head change can increase the internal erosion of soil

resulting in faster water transport and increased loss of particles through migration. [Conclusion] Changes in hydraulic conditions had a significant effect on erosion within the soil

with sinusoidal heads exacerbating particle migration and loss.

关键词

Keywords

references

Ke Lin, Aakahashi A. Strength reduction of cohesionless soil due to internal erosion induced by one-dimensional upward seepage flow[J]. Soils and Foundations, 2012,52(4):698-711.

Indraratna B, Nguyen V T, Rujikiatkamjorn C. Assessing the potential of internal erosion and suffusion of granular soils[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2011,137(5):550-554.

To P, Scheuermann A, Williams D J. Quick assessment on susceptibility to suffusion of continuously graded soils by curvature of particle size distribution[J]. Acta Geotechnica, 2018,13(5):1241-1248.

张瑞豪,肖洋,邵社刚,等.黑土区坡耕地侵蚀沟演变对土壤粒径分布及蓄水性的影响[J].水土保持通报,2023,43(2):1-8. Zhang Ruihao, Xiao Yang, Shao Shegang, et al. Effects of erosion gully evolution on particle size distribution and water storage properties in sloping cropland of a black soil area[J]. Bulletin of Soil and Water Conservation, 2023,43(2):1-8.

杨青松,倪世民,王军光,等.粗颗粒土壤坡面侵蚀泥沙颗粒特征[J].水土保持学报,2022,36(4):30-36. Yang Qingsong, Ni Shimin, Wang Junguang, et al. Characteristics of erosion and sediment particles on coarse texture soil slope[J]. Journal of Soil and Water Conservation, 2022,36(4):30-36.

Kenney T C, Lau D. Internal stability of granular filters:Reply[J]. Canadian Geotechnical Journal, 1986,23(3):420-423.

Burns B, Barker R, Ghataora G S. Investigating internal erosion using a miniature resistivity array[J]. NDT&E International, 2006,39(2):169-174.

Chang Dongsheng, Zhang Limin. Critical hydraulic gradients of internal erosion under complex stress states[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2013,139(9):1454-1467.

陈亮,雷文,张红宇,等.非稳定流作用下管涌发生发展的室内试验及理论分析[J].岩土工程学报,2013,35(4):655-662. Chen Liang, Lei Wen, Zhang Hongyu, et al. Laboratory simulation and theoretical analysis of piping mechanism under unsteady flows[J]. Chinese Journal of Geotechnical Engineering, 2013,35(4):655-662.

毛昶熙,段祥宝,蔡金傍,等.洪峰过程非稳定渗流管涌试验研究与理论分析[J].水利学报,2005,36(9):1105-1114,1120. Mao Changxi, Duan Xiangbao, Cai Jinbang, et al. Piping experimental study and theoretical analysis of unsteady seepage flow during flood peak[J]. Journal of Hydraulic Engineering, 2005,36(9):1105-1114,1120.

王保亮,李泳,苟万春,等.降雨作用下土体细颗粒迁移特征及其对崩塌的影响[J].工程科学与技术,2017,49(增刊2):40-50. Wang Baoliang, Li Yong, Gou Wanchun, et al. Fine grain migration and its impact on soil failures under rainfall infiltration[J]. Advanced Engineering Sciences, 2017,49(Suppl.2):40-50.

熊传祥,王涛,鲁晓兵.降雨作用下崩岗形成细观机理模拟[J].山地学报,2013,31(6):710-715. Xiong Chuanxiang, Wang Tao, Lu Xiaobing. Meso-mechanical simulation of slope disintegration erosion under rainfall[J]. Journal of Mountain Science, 2013,31(6):710-715.

邓龙洲,张丽萍,邬燕虹,等.侵蚀性风化花岗岩坡地降雨产流及水文过程研究[J].水土保持学报,2018,32(2):67-73. Deng Longzhou, Zhang Liping, Wu Yanhong, et al. Characteristics of rainfall runoff and hydrological dynamics on the erosive weathered granite slope[J]. Journal of Soil and Water Conservation, 2018,32(2):67-73.

谈勋勋.压实花岗岩风化土的微观结构及其渗流特征研究[D].广西桂林:桂林理工大学,2021. Tan Xunxun. Research on microstructure and seepage characteristics of compacted granite weathered soil[D]. Guangxi Guilin:Guilin University of Technology, 2021.

建设部.土的工程分类标准:GB/T50145-2007[S].北京:中国计划出版社,2007. Ministry of construction. Standard for Classification of Soil Works:GB/T50145-2007[S].Beijing:China Planning Press, 2007.

Guerrero M, Rüther N, Szupiany R N. Laboratory validation of acoustic Doppler current profiler (ADCP) techniques for suspended sediment investigations[J]. Flow Measurement and Instrumentation, 2012, 23(1):40-48.

Ambarwulan W, Verhoef W, Mannaerts C M, et al. Estimating total suspended matter concentration in tropical coastal waters of the Berau estuary, Indonesia[J]. International Journal of Remote Sensing, 2012, 33(16):4919-4936.

白冰,张鹏远,宋晓明,等.渗透作用下多孔介质中悬浮颗粒的迁移过程研究[J].岩土工程学报,2015,37(10):1786-1793. Bai Bing, Zhang Pengyuan, Song Xiaoming, et al. Transport processes of suspended particles in saturated porous media by column seepage tests[J]. Chinese Journal of Geotechnical Engineering, 2015,37(10):1786-1793.

陈星欣,白冰,于涛,等.粒径和渗流速度对多孔介质中悬浮颗粒迁移和沉积特性的耦合影响[J].岩石力学与工程学报,2013,32(增刊1):2840-2845. Chen Xingxin, Bai Bing, Yu Tao, et al. Coupled effects of particle size and flow rate on characteristics of particle transportation and deposition in porous media[J]. Chinese Journal of Rock Mechanics and Engineering, 2013,32(Suppl.1):2840-2845.

蒋思晨,白冰.悬浮颗粒形状对其在多孔介质中迁移和沉积特性的影响[J].岩土力学,2018,39(6):2043-2051. Jiang Sichen, Bai Bing. Influence of particle shape on the suspended particle transport and deposition in porous media[J]. Rock and Soil Mechanics, 2018,39(6):2043-2051.

彭怡,王玉宽,傅斌,等.紫色土流失土壤的颗粒特征及影响因素[J].水土保持通报,2010,30(2):142-144. Peng Yi, Wang Yukuan, Fu Bin, et al. Particle characteristics and influencing factors of eroded purple soil[J]. Bulletin of Soil and Water Conservation, 2010,30(2):142-144.

赵莼,高照良,李永红,等.连续径流冲刷条件下工程堆积体土壤侵蚀特征[J].水土保持通报,2022,42(6):61-67. Zhao Chun, Gao Zhaoliang, Li Yonghong, et al. Soil erosion characteristics of engineering deposits under continuous runoff scouring[J]. Bulletin of Soil and Water Conservation, 2022,42(6):61-67.

倪小东,赵帅龙,王媛.非稳定流作用下管涌发生发展的细观数值模型试验研究[J].中南大学学报(自然科学版),2016,47(9):3154-3161. Ni Xiaodong, Zhao Shuailong, Wang Yuan. Numerical analysis of generation and evolution of piping mechanism in meso-level under unsteady flow[J]. Journal of Central South University (Science and Technology),2016,47(9):3154-3161.

王志兵.泥石流源区土体颗粒运移堵塞效应及其斜坡破坏模式[D].北京:中国科学院大学,2011. Wang Zhibing. Particle transport plugging effect of soil and its slope failure mode in debris flow source area[D]. Beijing:University of Chinese Academy of Sciences, 2011.

梁健伟,房营光.极细颗粒黏土渗流特性试验研究[J].岩石力学与工程学报,2010,29(6):1222-1230. Liang Jianwei, Fang Yingguang. Experimental study of seepage characteristics of tiny-particle clay[J]. Chinese Journal of Rock Mechanics and Engineering, 2010,29(6):1222-1230.

段金贵,王怀星,姚姬璇,等.黄土坡面的微生物矿化加固及抗侵蚀性能试验研究[J].水土保持通报,2022,42(5):33-40. Duan Jingui, Wang Huaixing, Yao Jixuan, et al. Experimental study on microbial mineralization reinforcement and erosion resistance of loess slope surface[J]. Bulletin of Soil and Water Conservation, 2022,42(5):33-40.[FL)]

浏览量

405

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

川藏公路南线泥石流坝溃决洪水过程试验研究

泥石流作用下路基易损性模型试验研究

西藏古乡沟堆积扇泥石流输沙特征

基于试验模拟的滑坡泥石流灾害链风险监测预警

典型干旱区山地-绿洲-荒漠生态系统服务价值的时空演变——以玛纳斯河流域为例