Rock and Soil Mechanics ›› 2018, Vol. 39 ›› Issue (S2): 359-365.doi: 10.16285/j.rsm.2018.1310

• Geotechnical Engineering • Previous Articles     Next Articles

Effect of auto-compensating steel struts on stress and deformation behaviors of supporting structures

HUANG Biao1, LI Ming-guang1, HOU Yong-mao2, CHEN Jin-jian1   

  1. 1. Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. Shanghai Tunnel Engineering Co., Ltd., Shanghai 200032, China
  • Received:2018-07-19 Online:2018-12-21 Published:2019-01-06
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41330633, 41602283) and the Talent Program of Shanghai Committee of Science and Technology(16QB1403400).

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Abstract: Auto-compensating steel struts can supply the part of prestress loss of steel struts caused by wall deformations to unexcavated side and limit deformations of retaining walls effectively. Based on working mechanism of auto-compensating struts and spring-beam model, the mixed boundary condition of single force and springs is used to build the equilibrium of retaining walls supported by auto-compensating struts. Then the process of excavation in a tunnel project using auto-compensating struts and prestressed struts is simulated. The controlling target of auto-compensating steel struts is axial force. The comparison of development of the bending moments and deformation behaviors of retaining walls during excavation is carried out. The results show that the auto-compensating struts can supply prestress loss and limit wall deformations better than prestressed struts. However, bending moments on unexcavated side increases significantly supported by auto-compensating struts. Finally, rationality of the method is proved by comparing with field data.

Key words: auto-compensating steel strut, spring foundation beam method, mixed boundary condition, stress and deformations of diaphragm walls

CLC Number: 

  • TU 91
[1] Lü Xi-lin, ZHOU Yun-cai, LI Feng-di, . Centrifuge model test and numerical simulation of stability of excavation face of shield tunnel in silty sand [J]. , 2016, 37(11): 3324-3328.
[2] GU Yin, ZHUANG Shu-man, ZHUO Wei-dong, SUN Ying. Analysis of nonlinear seismic response of subway station considering saturated soil [J]. , 2015, 36(11): 3243-3251.
[3] ZHU Jiang-hong ，YANG Jian-hui ，SHI Gao-ping ，WANG Jun ，CAI Jian-ping，. Calculating method for conformal mapping from exterior of unit circle to exterior of cavern with arbitrary excavation cross-section [J]. , 2014, 35(1): 175-183.
[4] HUANGFU Peng-peng , WU Fa-quan , GUO Song-feng , XIONG Zheng. A new method for calculating mapping function of external area of cavern with arbitrary shape based on searching points on boundary [J]. , 2011, 32(5): 1418-1424.
[5] GAO Cheng-lei, ZHU Yong-quan. Sensitivity analysis of parameters of cavern-pile method for shallow buried underground excavated tunnels [J]. , 2007, 28(S1): 536-539.
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