ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2023, Vol. 43 ›› Issue (11): 1944-1953.DOI: 10.3973/j.issn.2096-4498.2023.11.014
Previous Articles Next Articles
XU Yu1, XU Guoping1, CHEN Weile2, SONG Shenyou2
Online:
Published:
Abstract: The utilization of offshore composite foundations with deep cement mixing(DCM) piles in immersed tunnels lacks precedence in China. Further exploration of the adaptability, stress characteristics, and layout forms of DCM piles in immersed tunnels is crucial. Therefore, a case study is conducted on the ShenzhenZhongshan link immersed tunnel. A threedimensional finite element model is employed to assess four distinct layout forms of DCM piles. A rational layout form for DCM piles is indentified and validated through field load plate tests. Key findings include: (1) DCM piles with shallow cover exhibit subpar quality and low strength, while the quality of the short pile section under the bracket layout form cannot be guaranteed. (2) Under similar replacement rates, the simulated settlement of piles with a singlepile layout is smaller than that with a bracket layout. Therefore the singlepile layout is superior for DCM piles. (3) The allowable bearing capacities of the composite foundation, with pile spacings of 3 m × 4 m and 3 m × 3 m, are not less than 158.3 and 211.1 kPa, respectively. These values align well with the calculated results. (4) Considering the foundation load distribution pattern and load plate test results, a variable space DCM pile layout of 3~5 m is preferred for the ShenzhenZhongshan link immersed tunnel.
Key words: ShenzhenZhongshan link, immersed tunnel, composite foundation of deep cement mixing pile, finite element, load plate test
XU Yu, XU Guoping, CHEN Weile, SONG Shenyou. Optimal Layout of Deep Cement Mixing Piles for Composite Foundations in Immersed Tunnels: A Case Study of ShenzhenZhongshan Link[J]. Tunnel Construction, 2023, 43(11): 1944-1953.
0 / / Recommend
Add to citation manager EndNote|Ris|BibTeX
URL: http://www.suidaojs.com/EN/10.3973/j.issn.2096-4498.2023.11.014
http://www.suidaojs.com/EN/Y2023/V43/I11/1944
Experimental Research and Design Principle Analysis on Push Type Final Joint of Immersed Tunnel in ShenzhenZhongshan Link
Stress Characteristics of ConcreteFilled Steel Tubular Column and Surface Deformation in PileBeamArch Station with Different RiseSpan Ratios of Arch:
a Case Study of Xiangheyuan Station on Beijing Metro Line 17
Parametric Sensitivity Study of Deep Foundation Pit in Upper Soft and Lower Hard Strata in Singapore: a Case Study of Underground Project
in Singapore Changi Airport Development
Application of Leveling and Positioning System for Gravel Bed of Excavator Used in ShenzhenZhongshan Link