Volume 35 Issue 5
Oct.  2021
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Article Navigation >  GEOTECHNICAL ENGINEERING TECHNIQUE  > 2021  >  35(5): 336-340
Yang Xing, Zhang Ronghui, Fang Kuanda, Liu Shenglong, Yang Zhiyong. Study on the Influence of Shield Synchronous Grouting Slurry Performance and the Optimization of its Proportion[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2021, 35(5): 336-340. doi: 10.3969/j.issn.1007-2993.2021.05.011
Citation: Yang Xing, Zhang Ronghui, Fang Kuanda, Liu Shenglong, Yang Zhiyong. Study on the Influence of Shield Synchronous Grouting Slurry Performance and the Optimization of its Proportion[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2021, 35(5): 336-340. doi: 10.3969/j.issn.1007-2993.2021.05.011
shu

Study on the Influence of Shield Synchronous Grouting Slurry Performance and the Optimization of its Proportion

doi: 10.3969/j.issn.1007-2993.2021.05.011
  • 1.

    School of Mechanics and Civil Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China

  • 2.

    Guangzhou Metro Design & Research Institute Co., Ltd., Guangzhou 510010, Guangdong, China

  • Received Date: 2020-10-03
  • Publish Date: 2021-10-22
    Abstract
  • Synchronous grouting with good performance during shield construction is conducive to effective control of ground surface settlement. In order to study the effects of different grout properties on ground settlement, the shield tunnel section of Harbin North Station-Dagengjia Station on Harbin Metro Line 2 was taken as the engineering background. Considering the three characteristics of slurry strength, initial setting time, and stone rate, the finite difference software FLAC3D was used to simulate the ground settlement caused by tunnel excavation, and the influence of different characteristics on ground settlement was analyzed. On this basis, the strength, initial setting time, bleeding rate and consistency characteristics of the slurry were analyzed through the ratio test of different slurries, and the optimal ratio of the slurry was obtained. The results show that: the slurry with high strength, short initial setting time and high stone rate has the best control effect on surface settlement. The amount of cement will increase the strength of the slurry and shorten the initial setting time. However, in water-rich formations, the water setting effect and consistency indicators need to be considered. This study can provide a certain reference and guidance for the improvement of synchronous grouting performance in shield construction.

     

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