基于CT扫描的斜坡非饱和带土体大孔隙定量化研究和三维重建

徐宗恒; 徐则民; 李凌旭

doi:10.13961/j.cnki.stbctb.2015.01.025

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基于CT扫描的斜坡非饱和带土体大孔隙定量化研究和三维重建

试验研究

- 基于CT扫描的斜坡非饱和带土体大孔隙定量化研究和三维重建
- Soil Macropores Quantification Study and 3D Reconstruction in Vadose Zones of Hillslope Based on X-Ray Computed Tomography
- 水土保持通报 2015年35卷第1期页码：133-138
- 作者机构：
  
  1. 昆明理工大学建筑工程学院,云南,昆明,650500
  2. 云南师范大学旅游与地理科学学院,云南,昆明,650500
  3. 云南大学滇池学院,云南,昆明,650228
- 作者简介：
- 基金信息：
  
  国家自然科学基金云南联合基金重点项目"植被发育斜坡对强降雨过程的地下水响应机制及其灾害效应"(U1033601);高等学校博士学科点专项科研基金项目"峨眉山玄武岩岩崩灾害孕育机理"(20135314110005)
- DOI：10.13961/j.cnki.stbctb.2015.01.025
  中图分类号：
- 纸质出版：2015
- 稿件说明：
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徐宗恒, 徐则民, 李凌旭. 基于CT扫描的斜坡非饱和带土体大孔隙定量化研究和三维重建[J]. 水土保持通报, 2015,35(1):133-138.

XU Zongheng, XU Zemin, LI Lingxu. Soil Macropores Quantification Study and 3D Reconstruction in Vadose Zones of Hillslope Based on X-Ray Computed Tomography[J]. Bulletin of Soiland Water Conservation, 2015, 35(1): 133-138.
徐宗恒, 徐则民, 李凌旭. 基于CT扫描的斜坡非饱和带土体大孔隙定量化研究和三维重建[J]. 水土保持通报, 2015,35(1):133-138. DOI： 10.13961/j.cnki.stbctb.2015.01.025.

XU Zongheng, XU Zemin, LI Lingxu. Soil Macropores Quantification Study and 3D Reconstruction in Vadose Zones of Hillslope Based on X-Ray Computed Tomography[J]. Bulletin of Soiland Water Conservation, 2015, 35(1): 133-138. DOI： 10.13961/j.cnki.stbctb.2015.01.025.

摘要

[目的] 系统开展植被发育斜坡非饱和带土体中大孔隙定量化和三维重建技术研究

为水分沿大孔隙迅速运移研究提供可靠理论依据

对于降雨型滑坡研究具有基础性意义。[方法] 采用CT技术对云南省昭通市盘河乡头寨滑坡滑源区左侧斜坡区两个尺寸为25 cm×25 cm×50 cm的大尺度土柱进行扫描

得到一系列平面和纵向CT切片图像。图像处理并计算得到了土柱中大孔隙随深度的变化情况以及3种物质(砾石、土体基质和大孔隙)的CT值范围;借助VolView 3.4体可视化交互系统实现了三维大孔隙通道系统的重组

研究其在空间内的连通性、分支性和复杂性。[结果] 包括根系通道、动物通道、干缩裂缝及团聚体间的结构性孔隙广泛发育于非饱和带土体中

且大孔隙分布异质性明显

波动变异较大

随着深度的增加大孔隙呈逐渐减小的趋势。三维重组清晰可见土柱内含有较多独立分布的大孔隙通道

它们具有较好的连通性。[结论] CT扫描技术作为非破坏性获得技术在斜坡非饱和土体大孔隙定量化和三维重建研究中应用是可行的。

Abstract

[Objective] Study on soil macropores quantification and 3D reconstruction is particularly important as it can provide reliable theoretical data for preferential flow study. It is also of great importance in precipitation induced landslide studies.[Methods] We took two 25 cm×25 cm×50 cm soil cores from vegetated slope in Panhe Town

Yunnan Province. Base on X-ray computed tomography

a series of plane and longitudinal slice images were collected. By images analysis

variations of soil macropores with the increase of soil depth and CT value of three substances(gravel

matrix

macropore) were studied. Soil macropore 3D reconstruction was achieved by visual interactive system VolView 3.4 to investigate the connectivity

branchedness and complexity of macropore.[Results] The macropores consisting of root channels

faunal tunnels

shrinkage cracks and inter-aggregate porosity were broadly found in vadose zones of vegetated slope soils. Heterogeneity in distribution of soil macropores was significant

and macroporosity decreased with the increasing soil depth. As clearly demonstrated by 3D reconstruction

macropores were well distributed and connected in the soil cores.[Conclusion] We highlight the importance of CT technique in soil macropore quantification and 3D reconstruction.

关键词

Keywords

references

徐则民,黄润秋.山区流域高盖度斜坡对极端降雨事件的地下水响应[J].地球科学展,2011,26(6):598-607.

Warner G S, Nieber J L, Moore I D, et al. Characterizing macropores in soil by computed tomography[J]. Soil Science Society of America Journal, 1989,53(3):653-660.

Anderson S H, Peyton R L, Gantzer C J. Evaluation of constructed and natural soil macropores using X-ray computed tomography[J]. Geoderma, 1990,46(1):13-29.

冯杰,郝振纯.CT扫描确定土壤大孔隙[J].水科学进展,2002,13(5):611-617.

吴华山,陈效民,陈粲.利用CT扫描技术对太湖地区主要水稻土中大孔隙的研究[J].水土保持学报,2007,21(2):175-178.

Zhu jiawen, Xu weiya, Yang xingguo, et al. The 28 October 1996 land slide and analysis of the stability of thecurrent Huashiban slope at the Liangjiaren Hydropower Station, Southwest China[J].Engineering Geology, 2010,114(1):45-56.

徐则民,黄润秋,唐正光.头寨滑坡的工程地质特征及其发生机制[J].地质论评,2007,53(5):691-698.

Grevers M C J, Jong E D E, Arnaud R J S T. The characterization of soil macroporosity with CT scanning[J]. Canadian Journal of Soil Science, 1989,69(3):629-637.

Peth S. Applications of microtomography in soils and sediments[J]. Developments in Soil Science, 2010,34:73-101.

王路君,左永振,孔宪勇,等.CT技术在岩土工程研究中的应用[J].地下空间与工程学报,2009,5(S2):1754-1775.

张季如,祝杰,黄丽,等.固结条件下软黏土微观孔隙结构的演化及其分形描述[J].水力学报,2008,39(4):394-400.

陶高梁,张季如.表征孔隙及颗粒体积与尺度分布的两类岩土体分形模型[J].科学通报,2009,54(6):838-846.

Heeraman D A, Hopmans J W, Clausnitzer V. Three dimensional imaging of plant roots in situ with X-ray computed tomography[J]. Plant and Soil, 1997,189(2):167-179.

Gantzer C J, Anderson S H. Computed tomographic measurement of macroporosity in chisel-disk and no-tillage seedbeds[J]. Soil and Tillage Research, 2002,64(1):101-111.

Luo Lifang, Lin Henry, Li Shangcai. Quantification of 3-D soil macropore networks in different soil types and land uses using computed tomography[J]. Journal of Hydrology, 2010,393(1):53-64.

王伟. 三峡库区紫色砂岩林地土壤优先流特征及其形成机理[D]. 北京:北京林业大学, 2011.

余长洪,周明耀.两种土壤大孔隙结构差异的数字图像分析[J].广东水利水电,2007(1):27-35.

Kitware homepage.volview 3.4 now available[EB/OL].[2015-03-05]http://www.kitware.com/opensource/volview.html.

李恩中.医学图像处理与分析软件平台综述[J].计算机科学与探索,2008,2(5):467-477.

黄易.三维数据场可视化关键技术研究[D].哈尔滨:哈尔滨工程大学,2006.

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