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 42 Issue 2
Apr.  2023
Turn off MathJax
Article Contents
Article Navigation >  CARSOLOGICA SINICA  > 2023  >  42(2): 382-390
XIAO Hongbin, JIN Yaomin. Case study on super high-rise foundation design of the deep-buried beaded karst cave[J]. CARSOLOGICA SINICA, 2023, 42(2): 382-390. doi: 10.11932/karst20230209
Citation: XIAO Hongbin, JIN Yaomin. Case study on super high-rise foundation design of the deep-buried beaded karst cave[J]. CARSOLOGICA SINICA, 2023, 42(2): 382-390. doi: 10.11932/karst20230209
shu

Case study on super high-rise foundation design of the deep-buried beaded karst cave

doi: 10.11932/karst20230209
  • 1.

    Shanghai Urban Construction Design and Research Institute Group Co., Ltd., Shanghai, 200125, China

  • 2.

    Shanghai Institute of Building Research Co., Ltd., Shanghai, 200032, China

  • Received Date: 2022-05-14
    Abstract
  • In 2007, a super high-rise building was proposed in a city. A detailed survey revealed the distribution of deep-buried beaded karst cave in the stratum under the surface of 80 meters. The construction of the proposed super high-rise building highly requires foundation stability, bearing capacity and deformation. The geological conditions of the site are complex because the site is irregularly distributed with deep-buried beaded karst caves with thin roofs in multiple layer. Geophysical exploration was conducted to prove that the burial depth of karst caves is likely to be deepened. There are many uncertainties in the horizontal and vertical distribution and connectivity of beaded karst caves. Because of the deep burial depth, the situation of groundwater cannot be accurately identified. If the foundation is shallowly buried and meets the demand of stability, its bearing capacity will not satisfy the requirement. Besides, the effective pile length is very limited, and the bearing capacity of a single pile cannot meet the design requirements. If the foundation is deeply buried, foundation piles will be fixed crossing the karst cave in each layer and entering the lower stable bedrock. Before design and construction, the construction survey should be conducted pile by pile, and foundation treatment such as grouting should be carried out for the karst cave in each layer within the range of pile shaft. However, the site survey has indicated that the recovery of 80-meter casing pipe was very difficult and even impossible for many pipes. The indeterminacy in vertical and horizontal distribution and in connectivity of karst caves was relatively large, leading to the inaccurate estimation of grouting volume, poor construction feasibility, and unavailability of managed cost. In order to address the indeterminacy of karst cave distribution—the biggest construction difficult, the shallow-buried design principle of the foundation was finally determined. According to the idea that the foundation should be shallowly buried and meet the requirement of bearing capacity as well, in the aspect of survey, the precondition for the foundation stability requirement—the deepest burial depth of each unit—was preliminary determined. Based on the distribution characteristics of karst caves, roof thicknesses and cavity distribution depths of different units, the survey was carried out by qualitative method and semi-quantitative method. It was also recommended to transform the foundation stability problem into an uneven foundation problem according to the normative framework. In terms of structural design, the foundation stability scheme was further defined through calculation, and accordingly the structure was redesigned to determine the structure model. From the perspective of architectural design, the professional scheme was revised to reduce the burial depth of the basement from the original 20 m to 12 m according to the shallow burial depth. The difficulty of shallow-buried scheme was focused on the bearing capacity of a single pile, and hence this problem was discussed in terms of architectural design. In order to reduce the bearing capacity of a single pile, the team for architectural design decided to use steel structure frame to reduce the upper load. In terms of structural design, the steel-framed shear wall and light-weight partition wall were used to reduce the wall thickness and structural dead weight and other loads. Two layers of reinforcement were adopted to increase the overall structural stiffness so as to control the uneven settlement. Although the design scheme was revised repeatedly to minimize the bearing capacity of a single pile, it still could not meet the design requirements; consequently, the construction was postponed. In order to successfully solve the problem of bearing capacity of a single pile, we visited the survey expert for foundation scheme and were recommended the new process of post-grouting for cast-in-place piles, which was still an innovation in 2007. In this process, the grouting of pile ends and pile sides after piling reinforces the soil around the ends and sides, and thus effectively increasing their resistance. In this way, this process greatly improved the bearing capacity of a single pile, and at the same time controlled the uneven settlement. The project of super high-rise building was finally carried forward in 2010.After the first phase of the project was completed, the average settlement and uneven settlement of Tower I well met the design requirements according to the settlement observation data during and after the construction. This complex project involved multi-disciplinary technical linkage including the deep integration of professional expertise from architectural design, survey, structural design and construction, which is a successful attempt on technology integration of survey, design and construction. Compared with the current integration of management progress, this technology is more complex and forward-looking. It is not only an innovation in the construction management process, but also shows a development direction for the future integration of technology optimization.

     

    • FullText(HTML)
  • loading
    • References(18)
  • [1]
    王文波. 岩土工程勘察设计和施工一体化模式探讨[J]. 施工, 2021(2):180-182.

    WANG Wenbo. Discussion on integrated mode of geotechnical engineering investigation, design and construction[J]. Construction, 2021(2):180-182.
    [2]
    廖斌. 探究岩土工程勘察设计与施工一体化的实现途径[J]. 绿色环保建材, 2018(7):103-105.

    LIAO Bin. Explore the way to implement the integrated model of geotechnical engineering investigation, design and construction[J]. Green Environmental Protection Building Materials, 2018(7):103-105.
    [3]
    谢晋. 岩土工程勘察设计与施工一体化模式探讨[J]. 低碳世界, 2014(23):199-200.

    XIE Jin. Discussion on integrated mode of geotechnical engineering investigation, design and construction[J]. Low Carbon World, 2014(23):199-200.
    [4]
    GBT51238-2018, 岩溶地区建筑地基基础技术标准[S]. 2018.

    GBT51238-2018. Technical standard for building foundation in karst area[S]. 2018.
    [5]
    彭涛, 李耀刚, 武威, 郭印. 深埋型岩溶勘察中的地球物理勘探技术[J]. 中国地球物理, 2009(5):293-294.

    PENG Tao, LI Yaogang, WU Wei, GUO Yin. Applications of geophysical exploration in deeply buried karst investigation[J]. The Chinese Geophysics, 2009(5):293-294.
    [6]
    DBJ45/024-2016, 岩溶地区建筑地基基础设计规范[S]. 2016

    DBJ45/024-2016. Code for design of building foundation in karst area[S]. 2016.
    [7]
    吴明鑫, 李伍平. 溶洞地基稳定性模糊综合评价法综述[J]. 长春工程学院学报(自然科学版), 2012, 13(1):39-42.

    WU Mingxin, LI Wuping. Fuzzy synthetic evaluation on the stability of foundation to karst cave[J]. Journal of Changchun Institute of Technology (Natural Sciences Edition), 2012, 13(1):39-42.
    [8]
    赵博超, 朱蓓, 王弘元, 赖柄霖. 浅谈岩溶塌陷的影响因素与模型研究[J]. 中国岩溶, 2015, 34(5):515-521.

    ZHAO Bochao, ZHU Bei, WANG Hongyuan, LAI Binglin. Influence factors and mathematical models of karst collapses[J]. Carsologica Sinica, 2015, 34(5):515-521.
    [9]
    李飞飞, 牛真茹. 东黄山国际小镇串珠状隐伏溶洞顶板稳定性研究[J]. 城市勘测, 2021(5):193-197.

    LI Feifei, NIU Zhenru. Study on the roof stability of beaded hidden cave in Donghuangshan International town[J]. Urban Geotechnical Investigation & Surveying, 2021(5):193-197.
    [10]
    牟春梅. 岩溶区地基岩体溶洞顶板稳定性评价[J]. 西部探矿工程, 2002, 77(4):33-36.

    MOU Chunmei. A evaluating on the stability of caves roof in karst areas[J]. West-China Exploration Engineering, 2002, 77(4):33-36.
    [11]
    高培德, 王林峰. 覆盖型岩溶塌陷的塌陷机制分析[J]. 中国岩溶, 2017, 36(6):770-776.

    GAO Peide, WANG Linfeng. Analysis of collapse mechanism for mantled karst collapse[J]. Carsologica Sinica, 2017, 36(6):770-776.
    [12]
    王建秀, 杨立中, 刘丹, 何静. 覆盖性无填充溶洞薄顶板塌陷稳定性研究[J]. 中国岩溶, 2000, 19(1):65-72.

    WANG Jianxiu, YANG Lizhong, Liu Dan, HE Jing. A discussion on the karst collapse evolution of the karst caves covered with thin rocky roof[J]. Carsologica Sinica, 2000, 19(1):65-72.
    [13]
    赵明华, 陈言章, 肖尧, 杨超炜. 非均布路基荷载下溶洞顶板稳定性分析[J]. 水文地质工程地质, 2018, 45(2): 36-43.

    ZHAO Minghua, CHEN Yanzhang, XIAO Yao, YANG Chaowei. Stability analysis of the karst roof under the non-uniform subgrade load[J]. 2018, 45(2): 36-43.
    [14]
    张贝贝, 伍廷亮, 王玉松, 晋明超. 贵阳某隐伏横向溶洞地基处理稳定性分析[J]. 工业建筑, 2022, 52(4):133-139.

    ZHANG Beibei, WU Tingliang, WANG Yusong, JIN Mingchao. Stability analysis on foundation treatment for a transverse karst cave in Guiyang[J]. Industrial Construction, 2022, 52(4):133-139.
    [15]
    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, 2002, 21(4):532-536.

    LI Bin, FAN Qiuyan, QIN Fengrong. Analysis on roof stability of karst cave in karst areas[J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(4):532-536.
    [16]
    GB 50021-2001(2009年版) , 岩土工程勘察规范[S]. 2009.

    GB 50021-2001(2009 edition). Code for investigation of geotechnical engineering[S]. 2009.
    [17]
    GB 50007-2011, 建筑地基基础设计规范[S]. 2011.

    GB 50007-2011. Code for design of building foundation[S]. 2011.
    [18]
    JGJ94-2008, 建筑桩基技术规范[S]. 2008.

    JGJ94-2008. Technical code for building pile foundations [S]. 2008.
    • 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(1617.0KB)
    XML

    Article Metrics

    Article views (704) PDF downloads(45) 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