河池机场填石高填方土基工后沉降离心模型试验研究

张军辉; 黄湘宁; 郑健龙; 韦建明; 徐先进

河池机场填石高填方土基工后沉降离心模型试验研究 English Version

1. 长沙理工大学公路工程教育部重点实验室，湖南长沙 410004; 2. 广西河池机场有限公司，广西河池 547000

基金项目: 国家重点基础研究发展计划项目（973计划）（2011CB411910）；国家高技术研究发展计划项目（863计划）（2012AA112504）；国家自然科学基金项目（51108048）；西部交通建设科技项目（2009318000062，2009319825090）；交通运输部道路结构与材料行业重点实验室开放基金项目（kfj110202）

详细信息

作者简介:
张军辉(1978- )，男，河南驻马店人，博士，副教授，硕士生导师，道路工程与铁道工程专业，主要从事道路和岩土工程方面的研究工作。E-mail: zjhseu@163.com。

中图分类号: TU41
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出版历程
- 收稿日期: 2012-06-14
- 发布日期: 2013-04-17

Centrifugal model tests on post-construction settlement of high embankment of Hechi Airport

1. Key Laboratory of Highway Engineering of Ministry of Education, Changsha University of Science & Technology, Changsha 410004, China; 2. Guangxi Hechi Airport Co., Ltd., Hechi 547000, China

摘要

摘要: 结合工程实例，采用不等应力模型设计方案，以梯形分布相似法配制填料，开展河池机场高填方土基工后沉降的离心模型试验研究。试验结果表明：无论是变化规律还是单位土基填高的沉降量，与现场监测结果具有良好的一致性；不同填料土基道肩沉降均大于场道中心，土基顶面呈马鞍形分布；试验结束后土基顶面、坡面未出现裂缝，表明河池机场填石高填方土基面临的主要工程问题不是失稳破坏，而是过大的沉降变形控制。最后，选择指数回归参数模型对工后沉降进行预测，预测结果表明，无论是工后沉降、残余沉降、沉降坡差还是沉降速率，煤矸石土基因针片状颗粒含量高、基材强度较低将导致更大的沉降变形和更长的工期。
- 高填方土基 /
- 离心模型试验 /
- 粒径效应 /
- 工后沉降 /
- 指数模型
Abstract: Taking the high embankment of Hechi Airport as an example，the centrifugal model tests are carried out based on an unequal stress model design plan. The filling stones for tests are made by means of the similarity method of trapezoid distribution. The test results of change and settlement of unit fill height are consistent with the field data. The settlement of the shoulder is larger than that in the center of the embankment surface which presents saddle shape. There are no cracks in the embankment. It is shown that the main problem of the high embankment of Hechi Airport is not landslide or failure, but too large settlement. Finally, the exponential model is selected to predict the final post-construction settlement. Regardless of the post-construction settlement, residual settlement, grade and settlement rate, the results show that the gangue filling embankment will have large settlement and long construction period because of high content of flat-elongated particles and low strength of base materials.
- high embankment /
- centrifugal model test /
- particle size effect /
- post-construction settlement /
- exponential model

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参考文献(20)

[1]	刘宏,张倬元,韩文喜. 用离心模型试验研究高填方地基沉降[J]. 西南交通大学学报, 2003,383:324-326. LIU Hong, ZHANG Zhuo-yuan, HAN Wen-xi. Centrifugal model tests for settlement of high embankment[J]. Journal of Southwest Jiaotong University, 2003, 383: 324-326. (in Chinese)
[2]	刘宏. 四川九寨黄龙机场高填方地基变形与稳定性系统研究[J]. 地球与环境, 2005,33:133-134. LIU Hong. Asystematic research on the deformation and stability of high embankment of Jiuzhai-Huanglong airport, Sichuan China[J]. Earth and Environment, 2005, 33
[3]	陈上明,张倬元,李强. 某机场场道软基变形性状的离心模型试验[J]. 地质灾害与环境保护, 1996,71:88-93. CHEN Shang-ming, ZHANG Zhuo-yuan, LI Qiang. Study on the deformation behavior of soft ground of an airport with centrifugal model[J]. Journal of Geological Hazards and Environment Preservation, 1996, 71
[4]	刘宏,张倬元,韩文喜. 高填方地基土工离心模型试验技术研究[J]. 地质科技情报, 2005,241:103-106. LIU Hong, ZHANG Zhuo-yuan, HAN Wen-xi. Centrifugal model technique of high embankment[J]. Geological Science and Technology Information, 2005, 241: 103-106. (in Chinese)
[5]	徐光明,章为民. 离心模型中的粒径效应和边界效应研究 [J]. 岩土工程学报, 1996,183:80-86. XU Guang-ming, ZHANG Wei-min. Centrifugal model technique of size effect and boundary effect[J]. Chinese Journal of Geotechnical Engineering, 1996, 183: 80-86. (in Chinese)
[6]	张利民,胡定. 瀑布沟高坝离心模型试验研究[J]. 水利学报, 19909:60-65. ZHANG Li-min, HU Ding. Centrifugal modeling techniques of pubugou dam[J]. Journal of Hydraulic Engineering, 19909
[7]	李凤鸣,饶锡保,卞富宗. 高土石坝离心模型试验技术研究[J]. 水利学报, 19944:23-32. LI Feng-ming, RAO Xi-bao, BIAN Fu-zhong. Centrifugal modeling techniques of high earth-rockfill dam[J]. Journal of Hydraulic Engineering, 19944: 23-32. (in Chinese)
[8]	包承纲,饶锡保. 土工离心模型的试验原理[J]. 长江科学院院报, 1998,152:1-7. BAO Cheng-gang, RAO Xi-bao. Principle of the geotechnical centrifuge model test[J]. Journal of Yangtze River Scientific Research Institute, 1998, 152: 1-7. (in Chinese)
[9]	杜延龄. 土工离心模型试验基本原理及其若干基本模拟技术研究[J]. 水利学报, 19938:19-28. DU Yan-ling. Research on fundamental principle and some basic simulation techniques of centrifugal model test [J]. Journal of Hydraulic Engineering, 19938: 19-28. (in Chinese)
[10]	濮家骝. 土工离心模型试验及其应用的发展趋势[J]. 岩土工程学报, 1996,185:92-94. PU Jia-liu. Tendency of centrifugal model test and its application [J]. Chinese Journal of Geotechnical Engineering, 1996, 185: 92-94. (in Chinese)
[11]	MIKASA M. Centrifugal model test of a rockfill dam[C]// Proc 7th ICSMFE Mexico, 1969: 325-333.Centrifugal model test of a rockfill dam[C]// Proc 7th ICSMFE Mexico, 1969: 325-333.
[12]	OVESEN N K. The use of physical models in design[C]// The Scaling Law Relationships, Proceedings of 7th European Conference on Soil Mechanics and Foundation Engineering. Brighton ICSMFE. Anon, 1979:319-323.
[13]	CRIAG W H. Simulation of foundations for offshore structures using centrifuge modelling[C]// Developments in Soil Mechanics and Foundation Engineering Model Studies[M]. London: Applied Science Pubishers LTD, Anon,1983:1-27.
[14]	BOLTON M D, LAU M D. Scale effects arising from particle size[C]// Proceedings of the International Conference on Geotechnical Centrifuge Modelling. Anon, 1988:127-131.
[15]	杨俊杰,柳飞,丰泽康男,等. 砂土地基承载力离心模型试验中的粒径效应研究[J]. 岩土工程学报, 2007,294:478-483. YANG Jun-jie, LIU Fei, TOYOSAWAY, et al. Particle size efects on bearing capacity of sandy ground in centrifugal test[J]. Chinese Journal of Geotechnical Engineering, 2007, 294
[16]	翁厚洋,朱俊高,余挺,等. 粗粒料缩尺效应研究现状与趋势[J]. 河海大学学报自然科学版, 2009,374:425-429. WENG Hou-yang, ZHU Jun-gao, YU Ting, et al. Status and tendency of studies on scale effects of coarse-grained materials[J]. Journal of Hohai University Natural Sciences, 2009, 374
[17]	饶锡保,包承纲. 离心试验技术在土石坝工程中的应用[J]. 长江科学院院报, 1992,92:21-27. RAO Xi-bao, BAO Cheng-gang. The application of centrifugal modeling techniques in earth rockfill dams[J]. Journal of Yangtze River Scientific Research Institute, 1992, 92: 21-27. (in Chinese)
[18]	刘宏,李攀峰,张倬元. 九寨黄龙机场高填方地基工后沉降预测[J]. 岩土工程学报, 2005,271:90-93. LIU Hong, LI Pan-feng, ZHANG Zhuo-yuan. Prediction of the post-construction settlement of the high embankment of Jiuzhai-Huanglong airport[J]. Chinese Journal of Geotechnical Engineering, 2005, 271: 90-93. (in Chinese)
[19]	陈建峰,石振明. 宽路堤和地基土共同作用分析[J]. 公路交通科技, 2006,232:6-9. CHEN Jian-feng, SHI Zhen-ming. Analysis of the interaction between broad embankment and its subsoil[J] Journal of Highway and Transportation Research and Development, 2006, 232: 6-9. (in Chinese)(in Chinese)
[20]	杨涛,戴济群,李国维. 基于指数法的分级填筑路堤沉降预测方法研究[J]. 土木工程学报, 2005,385:92-95. YANG Tao, DAI Ji-qun, LI Guo-wei. Settlement prediction of stage-construction embankment on soft ground using the exponent fitting method[J]. China Civil Engineering Journal, 2005, 385: 92-95. (in Chinese)