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Analysis of the temperature effect on the stresses and deformations of GRP panels during the grouting process when using relining technology

Zuzanna Fyall
Zuzanna Fyall
   | Dec 22, 2021
Studia Geotechnica et Mechanica's Cover Image
Studia Geotechnica et Mechanica
Volume 43 (2021): Issue s1 (December 2021)
Special Issue: Underground Infrastructure of Urban Areas
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Article Category: Special Issue Article
Published Online: Dec 22, 2021
Page range: 521 - 531
Received: Aug 31, 2021
Accepted: Nov 05, 2021
DOI: https://doi.org/10.2478/sgem-2021-0032
Keywords
© 2021 Zuzanna Fyall, published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

The increase in peak temperature at the casing–grout boundary as a function of grout thickness for three different types of Portland cement grout [16].
The increase in peak temperature at the casing–grout boundary as a function of grout thickness for three different types of Portland cement grout [16].

Figure 2

Deformation modulus in relation to temperature for GRP pipes [6]. GRP, glass-reinforced plastic.
Deformation modulus in relation to temperature for GRP pipes [6]. GRP, glass-reinforced plastic.

Figure 3

Assembly scheme and geometric characteristics of GRP panels: 1 – wooden spacer, 2 – grout, 3 – brick sewer, H – height from which the grout is distributed.
Assembly scheme and geometric characteristics of GRP panels: 1 – wooden spacer, 2 – grout, 3 – brick sewer, H – height from which the grout is distributed.

Figure 4

Stress distribution and deformations of the panel when the heat of hydration is equal to 25°C: (a) stress distribution, (b) 3D view of panel deformation, (c) 2D view of panel deformation with an indication of the location where the maximum value occurred.
Stress distribution and deformations of the panel when the heat of hydration is equal to 25°C: (a) stress distribution, (b) 3D view of panel deformation, (c) 2D view of panel deformation with an indication of the location where the maximum value occurred.

Figure 5

Stress distribution and deformations of the panel when the heat of hydration is equal to 40°C: (a) stress distribution, (b) 3D view of panel deformation, (c) 2D view of panel deformation with an indication of the location where the maximum value occurred.
Stress distribution and deformations of the panel when the heat of hydration is equal to 40°C: (a) stress distribution, (b) 3D view of panel deformation, (c) 2D view of panel deformation with an indication of the location where the maximum value occurred.

Figure 6

Stress distribution and deformations of the panel when the heat of hydration is equal to 50°C: (a) stress distribution, (b) 3D view of panel deformation, (c) 2D view of panel deformation with an indication of the location where the maximum value occurred.
Stress distribution and deformations of the panel when the heat of hydration is equal to 50°C: (a) stress distribution, (b) 3D view of panel deformation, (c) 2D view of panel deformation with an indication of the location where the maximum value occurred.

Figure 7

Stress distribution and deformations of the panel when the heat of hydration is equal to 70°C: (a) stress distribution, (b) 3D view of panel deformation, (c) view of panel deformation with an indication of the location where the maximum value occurred.
Stress distribution and deformations of the panel when the heat of hydration is equal to 70°C: (a) stress distribution, (b) 3D view of panel deformation, (c) view of panel deformation with an indication of the location where the maximum value occurred.

Figure 8

Scheme presenting the distribution of grout in two stages: A – first stage, B – second stage.
Scheme presenting the distribution of grout in two stages: A – first stage, B – second stage.

The obtained results for a GRP panel with a wall thickness equal to 15 mm.

Temperature of GRP panel (°C) Maximum normal stresses (MPa) Deformations (%)
25 61.71 9.5
40 71.07 15.21
50 89.66 28.71
70 Total failure

The obtained results for the GRP panel with a wall thickness equal to 20 mm.

Temperature of GRP panel (°C) Maximum normal stresses (MPa) Deformations (%)
25 27.25 2.71
40 28.24 3.51
50 29.45 4.33
70 39.02 12.76

The obtained results for a GRP panel with a wall thickness equal to 16 mm.

Temperature of GRP panel (°C) Maximum normal stresses (MPa) Deformations (%)
25 49.59 6.42
40 54.19 9.95
50 62.25 14.53
70 Total failure

The obtained results for a GRP panel with a wall thickness equal to 18 mm.

Temperature of GRP panel (°C) Maximum normal stresses (MPa) Deformations (%)
25 36.56 4.41
40 36.71 5.93
50 39.50 7.75
70 78.67 52.04

The obtained results for a GRP panel with a wall thickness equal to 17 mm.

Temperature of GRP panel (°C) Maximum normal stresses (MPa) Deformations (%)
25 41.38 5.15
40 43.84 7.28
50 48.63 9.5
70 235.69 Total failure

The obtained results for the GRP panels that were heated up to 40°C with the grout distributed in the second stage.

Wall thickness (mm) Temperature of grout equal to 25°C Temperature of grout equal to 40°C
Maximum normal stresses (MPa) Deformations (%) Maximum normal stresses (MPa) Deformations (%)
20 13.40 0.72 13.74 1.14
19 14.91 1.14 15.17 1.53
18 16.73 1.14 17.08 1.53
17 18.95 1.53 19.45 1.92
16 21.97 1.92 22.47 2.31
15 25.36 2.31 26.46 3.11
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