Geological Characteristics of Rock Masses Engineering inthe Tunnel Anchorage Area at Puli Bridge

YU Zheng-fu; XIA Guo-bang; WANG Shi-gu; ZHANG Qi-hua; DU Sheng-hua

doi:10.3969/j.issn.1001-5485.2015.08.013

Journal of Changjiang River Scientific Research Institute >

2015 , Vol. 32 >Issue 8: 72 - 77

DOI: https://doi.org/10.3969/j.issn.1001-5485.2015.08.013

ROCK SOIL ENGINEERING

Geological Characteristics of Rock Masses Engineering inthe Tunnel Anchorage Area at Puli Bridge

YU Zheng-fu ,
XIA Guo-bang ,
WANG Shi-gu ,
ZHANG Qi-hua ,
DU Sheng-hua

Expand

1.Construction Headquarters of Puli-Xuanwei Highway of Yunnan Province, Xuanwei 655400, China;
2.Key Laboratory of Geotechnical Mechanics & Engineering of MWR, Yangtze River Scientific Research Institute, Wuhan 430010, China;
3.Yangtze River Geotechnical Engineering Corporation,
Changjiang Water Resources Commission, Wuhan 430010, China

Received date: 2014-06-11

Online published: 2015-08-18

Fold

Abstract

Puli bridge is a large suspension bridge with a main span of 628 m and tunnel-type anchorage on one side. Rock mass unloading and karst problem are the key issues of engineering geology in the tunnel anchorage area. An exploration hole of 120 m long was excavated through the center of the anchorage, and in-situ rock mechanical test, sonic test and geological description were conducted in the exploration hole. The physical and mechanical parameters of rock masses and the classification of basic quality of rock masses were obtained. On this basis, the regularities of rock mass unloading and karst development varying with elevation and embedded depth were analyzed. Comprehensive investigation technologies and analysis methods involving ground surface geological survey, geological mapping, drilling, tunnel excavation, pitting, trenching, elastic wave testing, and in-situ testing are explored in view of the possible engineering geological problems of tunnel anchorage in karst region. These technologies provide fundamental data for the design of tunnel anchorage and the stability analysis, and are worth to be popularized in similar works.

Key words： Puli bridge; tunnel anchorage; rock mass unloading; karst; rock mass mechanics test

Cite this article

YU Zheng-fu , XIA Guo-bang , WANG Shi-gu , ZHANG Qi-hua , DU Sheng-hua . Geological Characteristics of Rock Masses Engineering inthe Tunnel Anchorage Area at Puli Bridge[J]. Journal of Changjiang River Scientific Research Institute, 2015 , 32(8) : 72 -77 . DOI: 10.3969/j.issn.1001-5485.2015.08.013

References

[1] 周程,景锋,边智华,等.薄层状灰岩区大型隧道锚碇承载力特性的岩石力学综合研究.中外公路,2011,31(6):41-45. (ZHOU Cheng, JING Feng, BIAN Zhi-hua, et al. Comprehensive Study on Rock Mechanics of the Bearing Capacity Property of Huge Tunnel-type Anchorage in Thin Stratified Limestone Region. Journal of China & Foreign Highway, 2011,31(6):41-45. (in Chinese))
张奇华,胡建华,陈国平,等. 矮寨大桥基础岩体稳定问题研究. 岩石力学与工程学报,2012,31(12):2420-2430. (ZHANG Qi-hua,HU Jian-hua,CHEN Guo-ping,et al. Study of Rock Foundation Stability of Aizhai Bridge. Chinese Journal of Rock Mechanics and Engineering, 2012,31(12): 2420-2430.(in Chinese))
董志宏,张奇华,丁秀丽,等. 矮寨悬索桥隧道锚碇稳定性数值分析. 长江科学院院报,2005,22(6):54-58. (DONG Zhi-hong,ZHANG Qi-hua,DING Xiu-li,et al. Numerical Analysis of Rock Mass Stability in Tunnel Anchorage of Aizhai Bridge. Journal of Yangtze River Scientific Research Institute,2005,22(6):54-58.(in Chinese))
邬爱清,彭元诚,黄正加,等. 超大跨度悬索桥隧道锚承载特性的岩石力学综合研究. 岩石力学与工程学报,2010,29(3):433-441. (WU Ai-qing,PENG Yuan-cheng,HUANG Zheng-jia,et al. Rock Mechanics Comprehensive Study of Bearing Capacity Characteristics of Tunnel Anchorage for Super-large Span Suspension Bridge. Chinese Journal of Rock Mechanics and Engineering,2010,29(3):433-441. (in Chinese))
朱杰兵,邬爱清,黄正加,等. 四渡河特大悬索桥隧道锚模型拉拔试验研究. 长江科学院院报,2006,23(4):51-55. (ZHU Jie-bing,WU Ai-qing,HUANG Zheng-iia,et al.Pulling Test of Anchorage Model of Siduhe Suspension Bridge.Journal of Yangtze River Scientific Research Institute,2006,23(4):51-55.(in Chinese))
卫军,李昊,杨曼娟,等. 基于ABAQUS 平台的四渡河悬索桥隧道锚围岩稳定性分析. 岩石力学与工程学报,2005,24(增1):4894-4899. (WEI Jun,LI Hao,YANG Man-juan,et al. Stability Analysis of Rock around Tunnel-type Anchorage of Siduhe Suspension Bridge Based on ABAQUS Software. Chinese Journal of Rock Mechanics and Engineering,2005,24(Sup.1):4894-4899.(in Chinese))
夏才初,程鸿鑫,李荣强. 广东虎门大桥东锚碇现场结构模型试验研究. 岩石力学与工程学报,1997,16(6):571-576. (XIA Cai-chu, CHENG Hong-xin, LI Rong-qiang. Testing Study on Field Structure Model of the East anchorage of Guangdong Humen Bridge. Chinese Journal of Rock Mechanics and Engineering, 1997, 16(6): 571-576.(in Chinese))
张奇华,余美万,喻正富,等. 普立特大桥隧道锚现场模型试验研究:抗拔能力试验. 岩石力学与工程学报, 2015, 34(1): 93-103. (ZHANG Qi-hua, YU Mei-wan, YU Zheng-fu, et al. Study on Field Model Test of Tunnel-type Anchorage at Puli Bridge: Anti-pulling Capacity Test. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(1): 93-103. (in Chinese))
余美万,张奇华,喻正富,等. 基于夹持效应的普立特大桥隧道锚现场模型试验研究. 岩石力学与工程学报, 2015, 34(2):261-270. (YU Mei-wan, ZHANG Qi-hua, YU Zheng-fu, et al. Field Model Experiment on Clamping Effect of Tunnel-type Anchorage at Puli Bridge. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(2):261-270. (in Chinese))
GB50218—94, 工程岩体分级标准. 北京:中国计划出版社,1994. (GB50218—94, Standard for Engineering Classification of Rock Masses. Beijing:China Planning Press,1994. (in Chinese))

Options

Outlines

模态框（Modal）标题

Abstract

Cite this article

References