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Application of high-precision three-dimensional mapping technology in urban housing structural safety inspection

Peijie Yu

Peijie Yu

Department of Civil Engineering, Zhengzhou College of Finance and EconomicsZhengzhou, China
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Yu, Peijie
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Yanlun Liu

Yanlun Liu

Department of Civil Engineering, Henan Technical College of ConstructionZhengzhou, China
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Liu, Yanlun
  
17 mar 2025
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Pubblicato online: 17 mar 2025
Ricevuto: 09 ott 2024
Accettato: 04 feb 2025
DOI: https://doi.org/10.2478/amns-2025-0174
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© 2025 Peijie Yu et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1.

The principle of the concave and convex characteristics
The principle of the concave and convex characteristics

Test data

Sedimentation detection data(mm)
2023.5.15 2023.5.16 2023.5.17 2023.5.18 2023.5.19
8:00 16:00 8:00 16:00 8:00 16:00 8:00 16:00 8:00 16:00
Varying quantity 4.846 3.685 4.158 3.512 4.186 3.285 4.082 3.188 4.285 3.282
Varying quantity Tilt detection data(°)
2023.5.15 2023.5.16 2023.5.17 2023.5.18 2023.5.19
8:00 16:00 8:00 16:00 8:00 16:00 8:00 16:00 8:00 16:00
X -1.285 -1.562 -1.065 -1.156 -1.089 -1.087 -1.048 -1.096 -1.152 -1.065
Y -0.789 -0.758 -0.768 -0.685 -0.728 -0.625 -0.526 -0.725 -0.755 -0.526
Z 88.485 88.685 88.957 88.964 88.765 88.756 88.966 88.755 88.645 88.845
Varying quantity Horizontal displacement detection data(mm)
2023.5.15 2023.5.16 2023.5.17 2023.5.18 2023.5.19
8:00 16:00 8:00 16:00 8:00 16:00 8:00 16:00 8:00 16:00
X 1.758 2.162 2.218 3.948 3.942 1.925 1.826 1.822 1.826 1.526
Y -3.865 -4.263 -4.531 -3.156 -3.815 -4.328 -3.255 -4.458 -3.157 -3.128
Two dimensional displacement length 4.125 4.684 5.035 5.454 3.655 4.728 4.062 5.063 3.566 4.053

Additional sedimentation of each sedimentation column after modification of modulus

E*104MPA Column 1-A Column 1-D Column 5-A Column 5-D Column 9-A Column 14-A Column 14-D
2.8 24.588 27.841 28.854 32.182 33.148 27.398 31.985
3 24.515 27.534 28.015 32.175 33.145 27.215 31.948
3.15 24.562 27.523 28.063 32.139 33.125 27.305 31.974
3.25 24.589 27.585 28.089 32.135 33.147 27.396 31.915
E*104MPA Column 2-A Column 2-B Column 2-C Column 2-D Column 3-A Column 3-B Column 3-C
2.8 25.052 26.875 27.245 27.859 25.688 26.895 27.918
3 25.036 26.615 27.268 27.915 25.684 26.947 27.936
3.15 25.048 26.588 27.687 27.951 25.688 26.974 27.927
3.25 25.054 26.856 27.456 27.956 25.614 26.974 27.936
E*104MPA Column 1-A Column 1-D Column 5-A Column 5-D Column 9-A Column 14-A Column 14-D
2.8 24.598 27.458 28.096 32.148 33.168 27.896 31.785
3 24.566 27.966 28.156 32.138 33.184 27.596 31.998
3.15 24.515 27.628 28.104 32.185 33.125 27.398 31.248
3.25 24.578 27.885 28.196 32.145 33.169 27.398 31.958
E*104MPA Column 1-A Column 1-D Column 5-A Column 5-D Column 9-A Column 14-A Column 14-D
2.8 24.597 27.612 28.485 32.175 33.184 27.652 32.087
3 24.605 27.614 28.996 32.148 33.148 27.518 32.007
3.15 24.633 27.628 28.154 32.336 33.195 27.369 32.065
3.25 24.604 27.988 28.745 32.174 33.178 27.965 32.014

Housing structure test results

Member Conversion value of masonry mortar resistance(MPa) Conversion value of brick resistance(MPa)
Name Axis number
Ground wall 6~7/B 3.948 8.257
4/B~C 4.325 7.376
Two-story wall 1~2/A 4.525 7.829
3~4/B 3.974 8.156
7~8/B 4.525 7.596
Member Concrete anti-pressure conversion value(MPa) The value of the strength of the cloud coagulation soil in the present age(MPa)
Name Axis number Mean value Standard deviation Minimum value
Top beam 8/B~C 28.287 2.375 24.915 24.596
6/A~B 28.653 1.818 25.631 25.485
Second floor top beam 3/B~C 29.185 2.569 26.278 25.385
3/A~B 29.675 1.975 27.168 26.487
8/B~C 29.169 3.278 27.294 23.551
Test floor Axis number Measured beam base number The measured band is the average spacing(mm) The measured cross section width×height(mm)
A top beam 8/B~C 4 root Full section:205 254×505
6/A~B 5 root Full section:215 253×207
5~6/B 4 root Full section:208 257×204
Two-story roof beam 3/B~C 3 root Full section:204 257×536
3/A~B 2 root Full section:210 254×206
Member Average spacing of bar
Name Axis number Steel direction Measured measurement (mm) Steel direction Measured measurement(mm)
Top plate 7~8/B~C 7↔9 132 B↔C 187
6~7/A~B 5↔6 242 A↔B 235
Two deck roof 9~10/A~C 8↔10 149 A↔C 157
3~4/B~C 4↔5 164 B↔C 198

Measurement of concrete strength of urban housing

Floor Build Type Constructive strength(Mpa) Design strength(Mpa) Rebound value/design value
Sublayer Floor Slab 30.345 30 1.185
Wall 36.585 30 1.285
Underground Layer Floor Slab 32.748 30 1.093
Wall 38.128 30 1.275
Layer Floor Slab 24.374 27 0.925
Wall 28.945 30 0.948
Second Layer Floor Slab 24.348 26 0.972
Wall 29.348 25 0.974
Three-Ply Floor Slab 27.845 25 1.156
Wall 28.148 24 1.136
Four-Ply Floor Slab 24.263 26 0.948
Wall 24.317 25 0.978
Pentinterval Floor Slab 28.183 25 1.132
Wall 24.425 26 0.925
Sexosphere Floor Slab 24.382 25 0.985
Wall 24.874 26 0.974
Heptad Floor Slab 25.365 25 1.088
Wall 29.348 25 1.148
Octal Layer Floor Slab 25.558 25 1.054
Wall 28.533 26 1.154
Nine Floors Floor Slab 24.728 25 0.948
Wall 28.348 25 1.184
Decida Floor Slab 24.918 26 0.978
Wall 28.365 25 1.126
Ten Layers Floor Slab 30.482 25 1.254
Wall 28.485 26 1.156

Statistical result

Precision index Δx Δy Δz Δs Δl
Model measurement Measurement point 1 29.458 30.548 66.158 9.085 11.758
Measurement point 2 28.456 33.415 71.585 12.267 12.248
Measurement point 3 34.598 31.578 69.288 13.485 14.925
External measurement Measurement point 1 30.278 30.524 70.488 9.158 9.514
Measurement point 2 29.578 30.248 67.285 8.328 13.537
Measurement point 3 29.178 30.297 68.274 10.595 11.918
Maximum error 4.258 -3.275 3.718 4.812 5.418
Minimum error -0.485 0.378 -0.548 0.785 2.258
Middle error 2.587 2.185 1.617 3.158 3.245
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Scienze biologiche, Scienze della vita, altro, Matematica, Matematica applicata, Matematica generale, Fisica, Fisica, altro
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