Application of a Hot Melt Recoverable Anchor Cable in Foundation Pit Support
Abstract
:1. Introduction
2. Project Overview
3. Hot Melt Retrievable Anchor Cable
3.1. Test Scheme
3.2. Test Parameter
4. Anchor Cable Support Scheme
4.1. The 1-1 Section of the Supporting Unit
4.2. The 2-2 Section of the Supporting Unit
4.3. The 3-3 Section of the Supporting Unit
5. Anchor Cable Construction Scheme and Effect
5.1. Construction Scheme
5.2. Test Results
5.3. Comparative Analysis
6. Conclusions
- (1)
- The hot melt recoverable anchor cable has excellent engineering characteristics. In the project, the grouting body in the anchoring section of the anchor cable and the anchor rod are under pressure, which can exert high compressive strength of the cement material. Meanwhile, the anchor cable is jointly carried by each unit anchoring section, and the formation strength is used to achieve a high anchoring force.
- (2)
- The hot melt recyclable anchor cable has a strong anti-corrosion ability. There will be no tension cracks in the anchoring section of the anchor cable. At the same time, a non-bonded steel strand is used to wrap the PE plastic pipe, which can be used for permanent engineering reinforcement.
- (3)
- The hot melt recoverable anchor cable has good economic benefits. The cable is quick and convenient to make, simple to construct, and easy to recover. Recovery simply relaxes the working anchor pieces and pull them out one by one using a jack or winch.
- (4)
- The hot melt recoverable anchor cable has broad application prospects. In temporary projects, recycling can be easily achieved after the completion of use, will not cause pollution to the underground space near the project and subsequent development obstacles, and will have broad application prospects in urban construction.
- (5)
- At present, there are still some problems in the application of recyclable anchor cables, requiring further clarification of the use of recycling bolts and cables, establishing a certain incentive mechanism, encouraging the enthusiasm for recycling bolt production and recycling manufacturers, forming an industrial development chain, and promoting the use of recycling bolts and cables.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
- Dinhoble, D.E. Retrievable Whipstock Anchor Assembly. US Patent 5,398,754, 21 March 1995. [Google Scholar]
- Moore, M.T. Retrievable Webbing Anchor System (the Slick!). US Patent 20020170777, 21 November 2002. [Google Scholar]
- Salahieh, A.; Brandt, B.D.; Morejohn, D.P.; Haug, U.R.; Dueri, J.-P.; Valencia, H.F.; Geshlider, R.A. Retrievable Heart Valve Anchor and Method. US Patent US20050137689 A1, 26 January 2016. [Google Scholar]
- Wang, W.; Weng, Q.; Wu, J. Design and application of large-diameter retrievable anchor cable in soft soil area. Build. Struct. 2012, 42, 177–180. [Google Scholar]
- Wang, L.M.; Shi, M.S.; Xu, L.Y.; Wang, Y.B.; Zhou, J.M. Retrievable enlarged-end anchor with looped non-sticky steel-string. Chin. J. Geotech. Eng. 2010, 32, 471–474. [Google Scholar]
- Sheng, H.G. Research on Anchoring Performance and Design Method of Pressure Distributed Anchor Cable; Chengdu University of Technology: Chengdu, China, 2003. [Google Scholar]
- Zhao, Q.J.; Liu, Z.G. Technical research and application of recoverable anchor cable in foundation pit support engineering. Chin. J. Geotech. Eng. 2012, 34, 480–483. [Google Scholar]
- Guo, Y.P.; Li, S.M.; Li, H.X. Development status and prospect of recoverable anchor cable. Sichuan Build. Sci. Res. 2015, 41, 136–140. (In Chinese) [Google Scholar]
- Zhu, Y.; Miao, S.; Li, H.; Han, Y.; Lan, H. An Empirical Shear Model of Interface between the Loess and Hipparion Red Clay in a Loess Landslide. Front. Earth Sci. 2022, 9, 806832. [Google Scholar] [CrossRef]
- Wang, G.; Chen, W.; Cao, L.; Li, Y.; Liu, S.; Yu, J.; Wang, B. Retaining Technology for Deep Foundation Pit Excavation Adjacent to High-Speed Railways Based on Deformation Control. Front. Earth Sci. 2021, 9, 735315. [Google Scholar] [CrossRef]
- Zhou, N.Q.; Tang, Y.Q.; Luo, R.X.; Jiang, S. Numerical simulation of deep foundation pit dewatering and land subsidence control of Xujiahui Metro Station. Chin. J. Geotech. Eng. 2011, 33, 1950–1956. [Google Scholar]
- Zhou, N.; Vermeer, P.A.; Lou, R.; Tang, Y.; Jiang, S. Numerical simulation of deep foundation dewatering and optimization of pit controlling land subsidence. Eng. Geol. 2010, 114, 251–260. [Google Scholar] [CrossRef]
- Gong, X.N.; Yu, J.L. Development and Prospect of recoverable bolt technology. J. Civ. Eng. 2021, 54, 90–96. [Google Scholar]
- Deng, Y.S.; Cai, M.Z.; Wang, Y.X.; Su, J.L.; Sun, Y.N. Research on Mechanism and Engineering Application of Recyclable Anchor Parts. Mater. Rev. 2019, 33, 473–479. [Google Scholar]
- Wang, Z.; Wang, Q.K.; Ma, S.J.; Xue, Y.; Xu, S.F. Study on calculation method of ultimate tensile force of prestressed anchor cable with extended head recovery. Rock Soil Mech. 2018, 39, 202–208. (In Chinese) [Google Scholar]
- Shen, Y.M.; Zhang, D.M.; Wang, R.L.; Li, J.; Huang, Z. SBD-K-medoids-based long-term settlement analysis of shield tunnel. Transp. Geotech. 2023, 42, 101053. [Google Scholar] [CrossRef]
- Lu, L.; Zhang, Y.X.; Wu, S.G. Study on stress distribution in anchorage section of pressure type anchor bolt. Rock Soil Mech. 2008, 29, 1517–1520. [Google Scholar]
- Zhang, J.R.; Tang, B.F. Hyperbolic function model for load transfer mechanism analysis of anchor rod. Chin. J. Geotech. Eng. 2002, 24, 188–192. [Google Scholar]
- Pang, Y.S.; Liu, H.L.; Gong, Y.J. Experimental study on pullout resistance of recoverable anchor bolt. Rock Soil Mech. 2010, 31, 1813–1816+1821. [Google Scholar]
- Zhang, X.X.; Fu, G.J.; Liu, H.K.; Li, B.G. Research status and Prospect of recoverable anchor rod (cable) technology. Highway 2017, 62, 1–8. [Google Scholar]
- Li, X.J.; Li, S.M.; Xu, B. New development and prospect of rock bolt and cable. Constr. Technol. 2015, 44, 37–43. [Google Scholar]
- Zhou, C.; Hu, Y.; Xiao, T.; Ou, Q.; Wang, L. Analytical model for reinforcement effect and load transfer of pre-stressed anchor cable with bore deviation. Constr. Build. Mater. 2023, 379, 131219. [Google Scholar] [CrossRef]
- Gao, K.; Liu, J.; Zeng, Q.; Cheng, J.; Sun, L.; Lin, L. Study on the Dynamic Characteristics of Bit Anchor Cable Drilling in the Gravel Sediments of a Soft Rock Bottom Hole. J. Mech. Eng. 2023, 69, 3–16. [Google Scholar] [CrossRef]
- Sun, X.; Cui, L.; He, M.; Cheng, J.; Sun, L.; Lin, L. Static tensile mechanical properties and engineering application of constant resistance and large deformation anchor cable. Tunn. Undergr. Space Technol. 2023, 69, 3–16. [Google Scholar] [CrossRef]
- Li, Z.P.; Li, W.T.; Wang, J. Study on Stress Distribution and anchorage length of recoverable anchor cable. Beijing Jiaotong Univ. 2011, 35, 57–61. [Google Scholar]
- GJB/3635-99; Technical Code for Design and Construction of Prestressed Anchor Cables for Geotechnical Engineering. The General Armament Department of the Chinese People’s Liberation Army: Beijing, China, 1999.
Stratigraphic Sequence Number | Landlord Stratum | Site Sublevel |
---|---|---|
① | Filling (Q4ml) | Mixed fill, plain fill |
② | Loess crushed stone (Q4al+pl) | Loess, gravel |
③ | Silty clay crushed stone, cemented crushed stone (Q3al+pl) | Silty clay, crushed stone, cemented crushed stone, silty clay mixed crushed stone |
④ | Silty clay with clay and gravel (Q3al+pl) | Silty clay, clay, crushed stone, silty clay mixed crushed stone, cemented crushed stone |
⑤ | Limestone (O1m) | More intact weathered limestone, more broken weathered limestone, broken weathered limestone, clay, gravel, clay mixed gravel |
Serial Number | Bolt Type | Bearing Plate Size | Suitable Cable Type | Steel Strand Specifications | Remark |
---|---|---|---|---|---|
1 | Full casing anchor cable | Φ100 | 1~5 | Φ12.7/15.2 | Suitable for Φ133 casing |
2 | Full casing anchor cable | Φ112 | 1~5 | Φ12.7/15.2 | Suitable for Φ146 casing |
3 | Full casing anchor cable | Φ135 | 2~10 | Φ12.7/15.2 | Suitable for Φ168 casing |
Bolt Type | Bolt Numbering | Loading Form | Design Bolt Diameter (mm) | Design of the Ultimate Pulling Force of the Bolt (kN) | Maximum Load Value (kN) | Termination Loading Condition | Measured Ultimate Bearing Capacity of the Bolt (kN) |
---|---|---|---|---|---|---|---|
Mechanically recoverable bolt | S-1-1 J | Multiple cycle loading test | 4 roots φ15.2 | 630 | 655 | The bolt body is pulled out | 582 |
S-1-2 J | Single cycle loading test | 4 roots φ15.2 | 630 | 509 | Anchor head displacement does not converge | 436 | |
S-1-3 J | Single cycle loading test | 4 roots φ15.2 | 630 | 582 | Anchor head displacement does not converge | 509 | |
S-2-3 J | Single cycle loading test | 4 roots φ15.2 | 630 | 655 | Anchor head displacement does not converge | 582 | |
S-2-1 J | Single cycle loading test | 4 roots φ15.2 | 630 | 509 | Anchor head displacement does not converge | 436 | |
Hot melt recoverable bolt | S-3-1 R | Single cycle loading test | 4 roots φ15.2 | 630 | 728 | Load to maximum load | 728 |
S-3-2 R | Single cycle loading test | 4 roots φ15.2 | 630 | 728 | Shaft failure | 655 | |
S-3-3 R | Multiple cycle loading test | 4 roots φ15.2 | 630 | 728 | Load to maximum load | 728 | |
Ordinary bolt | S-4-1 P | Single cycle loading test | 5 roots φ15.2 | 630 | 728 | Load to maximum load | 728 |
S-4-2 P | Single cycle loading test | 5 roots φ15.2 | 630 | 728 | Load to maximum load | 728 | |
S-4-3 P | Multiple cycle loading test | 5 roots φ15.2 | 630 | 728 | Load to maximum load | 728 |
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Liu, S.; Liu, G.; Ji, H.; Liu, X. Application of a Hot Melt Recoverable Anchor Cable in Foundation Pit Support. Buildings 2024, 14, 393. https://doi.org/10.3390/buildings14020393
Liu S, Liu G, Ji H, Liu X. Application of a Hot Melt Recoverable Anchor Cable in Foundation Pit Support. Buildings. 2024; 14(2):393. https://doi.org/10.3390/buildings14020393
Chicago/Turabian StyleLiu, Shian, Gang Liu, Hua Ji, and Xueying Liu. 2024. "Application of a Hot Melt Recoverable Anchor Cable in Foundation Pit Support" Buildings 14, no. 2: 393. https://doi.org/10.3390/buildings14020393