Volume 37 Issue 3
Jun.  2023
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Article Navigation >  GEOTECHNICAL ENGINEERING TECHNIQUE  > 2023  >  37(3): 365-372
Xu Guanyu, Chen Junsheng, Liu Zibing, Li Wei, Tan Yiwei. Temperature Stress of Superlong Reinforced Concrete Slab Bracing in Foundation Pit Retaining Structure[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2023, 37(3): 365-372. doi: 10.3969/j.issn.1007-2993.2023.03.019
Citation: Xu Guanyu, Chen Junsheng, Liu Zibing, Li Wei, Tan Yiwei. Temperature Stress of Superlong Reinforced Concrete Slab Bracing in Foundation Pit Retaining Structure[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2023, 37(3): 365-372. doi: 10.3969/j.issn.1007-2993.2023.03.019
shu

Temperature Stress of Superlong Reinforced Concrete Slab Bracing in Foundation Pit Retaining Structure

doi: 10.3969/j.issn.1007-2993.2023.03.019
  • 1.

    China Railway Construction Engineering Group, Guangzhou 511400, Guangdong, China

  • 2.

    School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China

  • 3.

    State Key Laboratory of Subtropical Building Science, School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China

  • 4.

    South China Institute of Geotechnical Engineering, Guangzhou 510640, Guangdong, China

  • Received Date: 2022-02-15
    Available Online: 2023-08-08
  • Publish Date: 2023-06-08
    Abstract
  • The calculation theory of axial force of concrete support is introduced, and applied to the axial force monitoring arrangement and axial force conversion of a large foundation pit slab support. According to the monitoring data of axial force of foundation pit slab support, horizontal displacement of ground diaphragm wall and temperature, the influence of temperature change on axial force of ultra-long reinforced concrete slab support and deformation of envelope structure was studied. The variation law of plate support axial force and horizontal displacement of ground connecting wall with temperature was verified and predicted, and the following conclusions are drawn: (1) The axial force of slab support is consistent with the trend of temperature change. The higher the temperature is, the more significant the influence of temperature change on the axial force of slab support is. The increase of daily temperature difference on the axial force of beam support is up to 30%, indicating that temperature is the main reason for the axial force change of long slab support beam under stable supporting and excavation conditions. (2) The horizontal displacement of the diaphragm wall at the plate support has a good correlation with the temperature change, but with the increase of depth, the influence of temperature change on the horizontal displacement of the diaphragm wall is weakened.

     

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