Deflection Mechanism and Treatment Technology of Permanent Derrick of Freeze Sinking on Deep Alluvium
Joint Authors
Yao, Zhishu
Liu, Mingkai
Wang, Xiaojian
Tang, Bin
Xue, Weipei
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-02-03
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Aiming at the problems of deflection and operation safety of permanent derrick of freeze sinking shafts, the mechanism analysis of uneven settling of the derrick foundations in frost-thawed soil was conducted.
In addition, research on ground stabilization and derrick deviation rectification technologies was also studied in this paper based on the engineering practice of derrick of auxiliary shaft in the Dingji Coal Mine.
Firstly, since the soil texture and artificial freeze temperature field are uneven, the bearing capacity and compression modulus of soil mass decrease after freeze thawing, resulting in uneven settlement of the foundation soil of the derrick footing and causing the deflection of the derrick.
The finite element numerical analysis indicates that, in the event of uneven settling, the greatest tensile stress in the derrick structure of Dingji auxiliary shaft increased by 39.83% and the largest pressure stress increased by 33.33%.
Secondly, this study used sleeve valve pipe single-fluid static pressure grouting technology to reinforce the foundation of the derrick footing.
The reinforced depth of grouting is 32 m, and every derrick foundation has adopted three circles of grouting holes for grouting reinforcement.
Meanwhile, the hydraulic synchronous jacking system was used to rectify the deviation of the derrick, restoring the centre line of derrick ascension to the original design state.
Finally, the practice of grouting, foundation consolidation, and derrick deviation rectification projects of the Dingji auxiliary shaft suggest that, after grouting reinforcement, the rate of foundation settlement is gradually decreased and tends to be stable.
This has resulted in uniform settlement, and through four basic jacking, the deflection of the derrick has been corrected to its initial design state.
American Psychological Association (APA)
Yao, Zhishu& Liu, Mingkai& Wang, Xiaojian& Tang, Bin& Xue, Weipei. 2019. Deflection Mechanism and Treatment Technology of Permanent Derrick of Freeze Sinking on Deep Alluvium. Advances in Civil Engineering،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1115419
Modern Language Association (MLA)
Yao, Zhishu…[et al.]. Deflection Mechanism and Treatment Technology of Permanent Derrick of Freeze Sinking on Deep Alluvium. Advances in Civil Engineering No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1115419
American Medical Association (AMA)
Yao, Zhishu& Liu, Mingkai& Wang, Xiaojian& Tang, Bin& Xue, Weipei. Deflection Mechanism and Treatment Technology of Permanent Derrick of Freeze Sinking on Deep Alluvium. Advances in Civil Engineering. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1115419
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1115419