Advanced Search
  • Included in CSCD
  • Chinese Core Journals
  • Included in WJCI Report
  • Included in Scopus, CA, DOAJ, EBSCO, JST
  • The Key Magazine of China Technology
Volume 43 Issue 5
Dec.  2024
Turn off MathJax
Article Contents
Article Navigation >  CARSOLOGICA SINICA  > 2024  >  43(5): 1099-1109
YU Qian, WANG Chengcheng, ZHANG Shasha, KOU Jingyuan, WANG Zhifeng. Impact of concealed karst caves on airport surface stability and treatment techniques[J]. CARSOLOGICA SINICA, 2024, 43(5): 1099-1109. doi: 10.11932/karst20240508
Citation: YU Qian, WANG Chengcheng, ZHANG Shasha, KOU Jingyuan, WANG Zhifeng. Impact of concealed karst caves on airport surface stability and treatment techniques[J]. CARSOLOGICA SINICA, 2024, 43(5): 1099-1109. doi: 10.11932/karst20240508
shu

Impact of concealed karst caves on airport surface stability and treatment techniques

doi: 10.11932/karst20240508
  • 1.

    China Airport Planning and Design Institute Co., Ltd., Beijing 100120, China

  • 2.

    School of Highway, Chang'an University, Xi'an, Shaanxi 710064, China

  • Received Date: 2023-11-07
    Available Online: 2024-12-30
    Abstract
  • If an airport is built in a karst area, a concealed karst cave will pose a challenge to the airport construction because of its concealment. The adverse geological effects in the site area of the third phase expansion project of Guangzhou Baiyun international airport are significantly pronounced. The roof thickness of 132 exposed karst caves ranges from 0.1 m to 5.2 m, the height varies from 0.7 m to 13.5 m, the span measures between 0.5 m and 11.7 m, and the buried depth ranges from 13.2 m to 32.7 m. Most of the karst caves exhibit no filling or poor filling properties. The groundwater at the site consists of loose rock pore water, with a water level depth of 4.38 m. The bedrock is mainly composed of soluble limestone. Additionally, the rock mass in the engineering site exhibits significant folding. Affected by the Guangcong Fault, many secondary faults are developed, and the brittle rock mass is easily broken. Consequently, the action of external forces such as foundation construction and road rolling likely cause the breakage of cave roofs and uneven settlement of ground, which is not conducive to the safe construction of airport pavement. Therefore, the stability evaluation and treatment technique of karst foundation are very important to the smooth completeness of this project.Based on the FLAC3D numerical simulation method, a 100 m×50 m×50 m three-dimensional calculation model was established to analyze the influence of different thickness-span ratios and high-span ratios of concealed karst caves on the stability of the airport site under the filling load of the roadbed. A comparative analysis was conducted to evaluate the displacement, plastic zone, and stress of typical karst caves before and after treatment, providing a comprehensive assessment of their stability. Finally, a field test was carried out with the combination of high-pressure pouring of low-grade concrete and sleeve valve pipe grouting. The treatment effects of filling karst caves with self-compacting soil, foam concrete, and low-grade concrete were compared and analyzed through various methods, including by core drilling, borehole wave velocity logging, geophysical prospecting tests, standard penetration tests, compressibility tests, and wave velocity profiling.The results show that when the thickness-span ratio and height-span ratio of a concealed karst cave decrease and the filling height of the subgrade increases, the displacement and stress of the karst cave show an increasing trend and tend to be unstable as a whole. Compared with the span of the cave, the roof thickness is relatively insufficient, and the bearing capacity is inadequate to bear the upper load. This presents potential risks of roof breakage and cave collapse. It can be concluded that the cave will significantly affect the stability of the airport. When the thickness-span ratio (KH) is greater than 1 or the height-span ratio (KG) is greater than 2 for the concealed karst cave, the whole cave tends to be stable, indicating a high level of its stability. After addressing the typical working conditions of karst caves through a combination of high-pressure perfusion of low-grade concrete and sleeve valve tube grouting, it has been found that the displacement of the roof of the karst cave following the treatment of low-grade concrete grouting is only 0.6 mm. This represents a reduction of 99.11% compared to conditions without treatment. The phenomenon of stress concentration is significantly reduced, resulting in enhanced foundation strength and effective grouting outcomes. Based on the comparative analysis of numerical calculation and field test, it is proposed that low-grade concrete should be preferentially used as filling material in the treatment of concealed karst caves in the third phase expansion project of Guangzhou Baiyun airport, followed by foam concrete. This study can provide reference for the selection of karst treatment measures in South China.

     

    • FullText(HTML)
  • loading
    • References(21)
  • [1]
    蒋小珍, 冯涛, 郑志文, 雷明堂, 张伟, 马骁, 伊小娟. 岩溶塌陷机理研究进展[J]. 中国岩溶, 2023, 42(3):517-527.

    JIANG Xiaozhen, FENG Tao, ZHENG Zhiwen, LEI Mingtang, ZHANG Wei, MA Xiao, YI Xiaojuan. A review of karst collapse mechanisms[J]. Carsologica Sinica, 2023, 42(3): 517-527.
    [2]
    陈标典, 李喜, 熊启华, 李彧磊, 涂婧, 刘鹏瑞, 叶疆. 武汉纸坊−庙山老黏土区岩溶地面塌陷形成演化与监测[J]. 中国岩溶, 2023, 42(2):361-369.

    CHEN Biaodian, LI Xi, XIONG Qihua, LI Yulei, TU Jing, LIU Pengrui, YE Jiang. Evolution and monitoring of karst ground collapse in the Zhifang-Miaoshan paleo-clay area of Wuhan[J]. Carsologica Sinica, 2023, 42(2): 361-369.
    [3]
    赵明华, 雷勇, 张锐. 岩溶区桩基冲切破坏模式及安全厚度研究[J]. 岩土力学, 2012, 33(2):524-530.

    ZHAO Minghua, LEI Yong, ZHANG Rui. Study of punching failure mode and safe thickness of pile foundation in karst region[J]. Rock and Soil Mechanics, 2012, 33(2): 524-530.
    [4]
    杨晓华, 李爱明, 李吉富. 山区既有公路桥梁桩基下伏溶洞处治技术[J]. 公路, 2020, 65(10):100-106.

    YANG Xiaohua, LI Aiming, LI Jifu. Treatment technology for underlying caves of pile foundation of highway bridges in mountainous areas[J]. Highway, 2020, 65(10): 100-106.
    [5]
    邓友生, 孟丽青, 蔡梦真, 孙雅妮, 李龙, 郑云方. 水泥土搅拌桩加固黄土路基稳定性研究[J]. 郑州大学学报(工学版), 2022, 43(3):59-66.

    DENG Yousheng, MENG Liqing, CAI Mengzhen, SUN Yani, LI Long, ZHENG Yunfang. Research on stability of loess roadbed reinforced with cement-soil mixing piles[J]. Journal of Zhengzhou University (Engineering Science), 2022, 43(3): 59-66.
    [6]
    汪婧. 基于上限分析原理的岩溶桩基破坏模式与极限承载力计算[J]. 铁道科学与工程学报, 2019, 16(9):2207-2214.

    WANG Jing. Failure mode and ultimate bearing capacity of karst pile foundation based on upper-bound theorem[J]. Journal of Railway Science and Engineering, 2019, 16(9): 2207-2214.
    [7]
    张合青, 杨国荣, 魏弋锋. 广州新白云机场土洞、溶洞的稳定性判别及其加固处理[J]. 地球与环境, 2005, 33(3):36-40.

    ZHANG Heqing, YANG Guorong, WEI Yifeng. Discrimination of stability of soil caves and solution caves in the process of construction of new Baiyun international airport in Guangzhou and their reinforcement[J]. Earth and Environment, 2005, 33(3): 36-40.
    [8]
    丁春林, 甘百先, 钟辉虹, 周顺华. 含土洞、溶洞的机场滑行道路基稳定性评估[J]. 岩石力学与工程学报, 2003, 22(8):1329-1333. doi: 10.3321/j.issn:1000-6915.2003.08.019

    DING Chunlin, GAN Baixian, ZHONG Huihong, ZHOU Shunhua. Stability evaluation of airfield runway subgrade containing earth caves and karst[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(8): 1329-1333. doi: 10.3321/j.issn:1000-6915.2003.08.019
    [9]
    刘自强, 马洪生, 牟云娟. 节理裂隙发育岩溶地基数值模拟稳定性分析[J]. 中国岩溶, 2022, 41(1):100-110.

    LIU Ziqiang, MA Hongsheng, MOU Yunjuan. Numerical simulation analysis and evaluation of stability of the karst foundation with developed joints and fissures[J]. Carsologica Sinica, 2022, 41(1): 100-110.
    [10]
    许汉华, 谢雨霖, 槐以高, 眭素刚, 肖经光, 李小双. 云南省高原型岩溶地基稳定性和适宜性评价[J]. 人民长江, 2022, 53(11):99-105.

    XU Hanhua, XIE Yulin, HUAI Yigao, SUI Sugang, XIAO Jingguang, LI Xiaoshuang. Evaluation on stability and suitability of plateau-type karst foundations in Yunnan Province[J]. Yangtze River, 2022, 53(11): 99-105.
    [11]
    赵明华, 袁腾方, 陈言章, 杨超炜. 基于Schwarz交替法的岩溶区双孔土洞地基稳定性分析[J]. 水利水电科技进展, 2018, 38(6):49-55.

    ZHAO Minghua, YUAN Tengfang, CHEN Yanzhang, YANG Chaowei. Stability analysis of double soil cave foundation in karst area based on Schwarz alternating method[J]. Advances in Science and Technology of Water Resources, 2018, 38(6): 49-55.
    [12]
    赵衡, 肖尧, 赵明华, 杨超炜. 路基下伏矩形溶洞的稳定性解析法[J]. 中国公路学报, 2018, 31(2):165-170, 180.

    ZHAO Heng, XIAO Yao, ZHAO Minghua, YANG Chaowei. Stability assessment method for subgrade with underlying rectangular cavity[J]. China Journal of Highway and Transport, 2018, 31(2): 165-170, 180.
    [13]
    王良川. 岩溶区路基下伏溶洞顶板稳定性分析及加固处理[J]. 矿冶工程, 2015, 35(5):17-21. doi: 10.3969/j.issn.0253-6099.2015.05.005

    WANG Liangchuan. Stability analysis and reinforcement measurement for subgrade with concealed cave in karst region[J]. Mining and Metallurgical Engineering, 2015, 35(5): 17-21. doi: 10.3969/j.issn.0253-6099.2015.05.005
    [14]
    杨仕升, 何声, 蒙雷, 王永幸. 广西岩溶区地震地质灾害及工程场地处理[J]. 地震工程学报, 2014, 36(4):790-796.

    YANG Shisheng, HE Sheng, MENG Lei, WANG Yongxing. Research on earthquake-induced geological disasters in the karst area in Guangxi and methods for engineering-site preparation[J]. China Earthquake Engineering Journal, 2014, 36(4): 790-796.
    [15]
    刘宏, 赵跃平, 邬相国, 王丹辉, 赵瑞峰. 强溶蚀带岩溶地基稳定性研究[J]. 矿业研究与开发, 2011, 31(3):35-39.

    LIU Hong, ZHAO Yueping, WU Xiangguo, WANG Danhui, ZHAO Ruifeng. Stability analysis on intensively soluted karst ground[J]. Mining Research and Development, 2011, 31(3): 35-39.
    [16]
    曾玉, 杨帧贤, 张娜. 覆盖型岩溶对工程建设的影响[J]. 重庆交通大学学报(自然科学版), 2011, 30(Suppl.1):697-699.

    ZENG Yu, YANG Zhenxian, ZHANG Na. The impact of covered karst in the engineering construction[J]. Journal of Chongqing Jiaotong Universtty (Natural Science), 2011, 30(Suppl.1): 697-699.
    [17]
    Assadi A, Sloan S W. Undrained stability of shallow square tunnel[J]. Journal of Geotechnical Engineering, 1991, 117(8): 1152-1173.
    [18]
    吕心瑞, 邬兴威, 孙建芳, 夏东领, 李彦普, 丁炎志, 王斌. 深层碳酸盐岩储层溶洞垮塌物理模拟及分布预测[J]. 石油与天然气地质, 2022, 43(6):1505-1514.

    LYU Xinrui, WU Xingwei, SUN Jianfang, XIA Dongling, LI Yanpu, DING Yanzhi, WANG Bin. Physical simulation and distribution prediction of karst cave collapsing in deepcarbonate reservoirs[J]. Oil and Gas Geology, 2022, 43(6): 1505-1514.
    [19]
    吕江, 赵晖, 杨杓. 洞径和覆土厚度对强夯法加固岩溶地基设计参数影响研究[J]. 建筑结构, 2021, 51(Suppl.1):1918-1922.

    LYU Jiang, ZHAO Hui, YANG Biao. Study on influence of cave diameter and covering thickness on parameter design of dynamic compaction for foundation in karst area[J]. Building Structure, 2021, 51(Suppl.1): 1918-1922.
    [20]
    吴平, 刘鹏, 吴学林. 基于钻孔CT溢洪道底部溶洞稳定性影响参数敏感性分析[J]. 水电能源科学, 2021, 39(4):117-120, 99.

    WU Ping, LIU Peng, WU Xuelin. Sensitivity analysis of parameters affecting stability of karst cave at the bottom of spillway based on drilling CT[J]. Water Resources and Power, 2021, 39(4): 117-120, 99.
    [21]
    常洲, 魏研博, 冷浩, 晏长根, 刘发波, 黄平. 隐伏充填型溶洞对隧道稳定性影响与防治技术[J]. 公路, 2022, 67(9):439-445.
    • Relative Articles
    • Supplements(0)
    • Cited By
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索
    Get Citation
    PDF(3706.0KB)
    XML

    Article Metrics

    Article views (38) PDF downloads(8) Cited by()
    Proportional views
    Related

    Website Copyright © CARSOLOGICA SINICA 桂ICP备05009877号-1

    Sponsor: Chinese Academy of Geological Sciences Sponsored by: Institute of Karst Geology, Chinese Academy of Geological Sciences Address: No.50, Qixing Road, Guilin, Guangxi

    Post Code: 541004 Tel: 0773-5812949 7796657 Email: zgyr@mail.cgs.gov.cn; zgyrbjb@163.com

    Supported by: Beijing Renhe Information Technology Co., Ltd.    

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return