桥梁桩基荷载下溶洞顶板稳定性研究

Abstract
Figure/Table
References (11)
Related Citation (15)

Download: PDF (779 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The present research is focused on the cave roof safety thickness and stability under pile loading in karst areas. Through the analysis of the interaction between the cave roof and pile foundation，four models were introduced to be as simply-supported，clamped circular plates and rectangular plates. Firstly，the force characteristics of cave roof under pile load in karst areas were analyzed. Based on the method of elasticity mechanics and introduction of Hoek-Brown criterion，a variety of simplified models were selected under consideration of the interaction between pile and cave roof. The maximum stress of the roof was then induced for different models following the theory of elastic mechanism. After the induction of the maximum stress，the theoretical formula of safety thickness was obtained，including the cases of four simplified models and anti-punching，shearing. Within the analysis of the stability for the cave roof，an equivalent conversion method for parameters was employed from the Hoek-Brown criterion to the Mohr-Coulomb criterion. In addition，compressive，tensile strength and other calculation parameters of the pile were determined，based on Hoek-Brown criterion，according to the detailed geological data of the West River Bridge. The cave roof thickness of different simplified models under different load conditions were then calculated by the theoretical formula. Using the finite element method，the theoretical results were identified to be the same as data from the numerical simulation. The results show that，it was feasible and effective to use the Hoek-Brown criterion to determine the stability of cave roof. Meanwhile，the results can be included in the national guideline for the design of piles in the bridge engineering in Karst areas.

Key words： pile foundations Hoek-Brown failure criterion cave roof stability safety thickness

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	WANG Huabin1
	2
	LIU Zhifeng3
	ZHAO Wenfeng1
	2
	ZHOU Bo1
	2
	LI Jiwei1
	2

Cite this article:

WANG Huabin1,2,LIU Zhifeng3, et al. RESEARCH on stability of cave roof under pile loading in bridge construction engineering[J]. , 2013, 32(s2): 3650-3657.

URL:

https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3650

[1] 罗强，谭捍华，龙万学，等. 岩溶地区公路桥基勘察与洞穴稳定性评价[J]. 公路交通科技，2006，23(2)：111–114.(LUO Qiang，TAN Hanhua，LONG Wanxue，et al. Survey of highway bridge foundation and stability evaluation of cave in carst region[J]. Journal of Highway and Transportation Research and Development，2006，23(2)：111–114.(in Chinese))

[2] 康厚荣，罗强，凌建明，等. 岩溶地区公路修筑理论与实践[M]. 北京：人民交通出版社，2008：275–290.(KANG Hourong，LUO Qiang，LING Jianming，et al. Theory and practice of highway construction in karst region[J]. Beijing：China Communications Press，2008：275–290.(in Chinese))

[3] ZHANG L Y，EINSTEIN H H. End bearing capacity of drilled shafts in rock[J]. Journal of Geotechnical and Geoenvironmental Engineering，1998，124(7)：574–584.

[4] 李仁江，盛谦，张勇慧，等. 溶洞顶板极限承载力研究[J]. 岩土力学，2007，28(8)：1 621–1 630.(LI Renjiang，SHENG Qian，ZHANG Yonghui，et al. Study on ultimate bearing capacity of upper rock plate of karst cave[J]. Rock and Soil Mechanics，2007，28(8)：1 621–1 630.(in Chinese))

[5] 工程地质手册编委会. 工程地质手册[M]. 4版. 北京：中国建筑工业出版社，2007：525–534.(Committee of Engineering Geology Manual. Engineering geology manual[M]. 4th ed. Beijing： China Architecture and Building Press，2007：525–534.(in Chinese))

[6] 黎斌，范秋雁，秦凤荣. 岩溶地区溶洞顶板稳定性分析[J]. 岩石力学与工程学报，2004，23(4)：532–536.(LI Bin，FAN Qiuyan，QIN Fengrong. Analysis of roof stability of karst cave in karst areas[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(4)：532–536.(in Chinese))

[7] 刘铁雄. 岩溶顶板与桩基作用机制分析与模拟试验研究[博士学位论文][D]. 长沙：中南大学，2003.(LIU Tiexiong. Mechanism analysis and experiment study of interaction between cave roof and pile foundation[Ph. D. Thesis][D]. Changsha：Central South University，2003.(in Chinese))

[8] 赵明华，蒋冲，曹文贵. 岩溶区嵌岩桩承载力及其下伏溶洞顶板安全厚度的研究[J]. 岩土工程学报，2007，29(11)：1 618–1 622. (ZHAO Minghua，JIANG Chong，CAO Wengui. Study on bearing capacity of rock-socked pile and safe thickness of cave roofs in karst region[J]. Chinese Journal of Geotechnical Engineering，2007，29(11)：1 618–1 622.(in Chinese))

[9] 祝方才，曹平，万文. 基于轴对称厚板模型的浅埋空区顶板安全厚度[J]. 采矿与安全工程学报，2006，23(1)：115–118.(ZHU Fangcai，CAO Ping，WAN Wen. Determination of safe roof thickness of underground shallow openings based on axisymmetric thick plate model[J]. Journal of Mining and Safety Engineering，2006，23(1)：115–118.(in Chinese))

[10] 赵明华，周磊，雷勇. 基于H-B强度理论的桩端岩层安全厚度确定[J]. 湖南大学：自然科学版，2011，37(6)：1–5.(ZHAO Minghua，ZHOU Lei，LEI Yong. Study on the safe thickness of the rock mass at the end of the pile based on Hoek-Brown strength criterion[J]. Journal of Hunan University：Natural Science，2011，37(6)：1–5.(in Chinese))

[11] HOEK E，CARRANZA-TORRES C，CORKUM B. Hoek-Brown failure criterion-2002 edition[C]// Proceedings of the NARMS-TAC Conference. Toronto：[s. n.]，2002：267–273.