Volume 35 Issue 5
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Liu Biyan. Construction of Bored Pile in Hourglass Karst Collapse Area[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2021, 35(5): 327-331. doi: 10.3969/j.issn.1007-2993.2021.05.009
Citation: Liu Biyan. Construction of Bored Pile in Hourglass Karst Collapse Area[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2021, 35(5): 327-331. doi: 10.3969/j.issn.1007-2993.2021.05.009
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Construction of Bored Pile in Hourglass Karst Collapse Area

doi: 10.3969/j.issn.1007-2993.2021.05.009

  • Wuhan Surveying-geotechnical Research Institute Co., Ltd. of MCC, Wuhan 430080, Hubei, China

  • Received Date: 2020-06-10
  • Publish Date: 2021-10-22
    Abstract
  • Conventional pile foundation construction technology cannot be used in karst collapse area, and effective construction measures should be taken to ensure safety and quality. Based on the causes and mechanism of hourglass karst collapse, the pretreatment measures before karst collapse and technical measures for pile foundation construction after karst collapse were summarizes combining with engineering examples. The distribution of karst was found out through effective investigation means before construction, and grouting method was adopted for pretreatment. After the collapse, in order to prevent the accident during pile foundation construction caused by the secondary collapse, the required steel platform was erected. The key points of full rotation and full set of construction technology are introduced.

     

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