Damage evaluation method for shield underneath pass masonry structure building

A masonry structure and evaluation method technology, applied in special data processing applications, instruments, electrical digital data processing and other directions, can solve the problems of neglecting local damage, underestimating the environmental impact of shield tunneling, large local differential settlement, etc., and achieving great application value , easy to promote, the effect of safety technical solutions

Active Publication Date: 2019-08-09
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
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Benefits of technology

This technology helps evaluate how well buildings are designed against being damaged during their use or installation process. By measuring changes over time that occur when they undergo stress from external sources like rainwater hitting them with force on it's surface, this can help identify areas where there may have been significant cracks due to environmental factors such as water pressure or other causes.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the accuracy of evaluating the severely affected areas (subways) within urban underfloor spaces such as buried railway constructions during excavator operations. Current conventional ways involve estimating the entirety of each individual house from its previous location, which cannot fully reflect any changes made over time.

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  • Damage evaluation method for shield underneath pass masonry structure building
  • Damage evaluation method for shield underneath pass masonry structure building
  • Damage evaluation method for shield underneath pass masonry structure building

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Embodiment Construction

[0041] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.

[0042] In one embodiment of the present invention, the subway shield passes under a certain masonry structure building, the shield tunnel is located directly under the building, and the vertical distance z between the center of the circle and the ground surface 0 = 12m; tunnel shield diameter D = 6m; ​​building length L = 50m; the top of the site tunnel is silty clay layer.

[0043] The first step is to determine the settlement curve of the building caused by shield excavation.

[0044] Estimate the formation loss rate V at this place according to the value of equipment, control deg

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Abstract

The invention belongs to the field of constructional engineering, and discloses a damage evaluation method for a shield underneath pass masonry structure building, which comprises the following steps:(1) determining a masonry structure building settlement curve caused by shield excavation; (2) determining an angular deformation function and a horizontal strain function of the masonry structure building according to the settlement curve of the masonry structure building; (3) determining a maximum tensile strain function of the masonry structure building according to the angular deformation function and the horizontal strain function of the masonry structure building; and (4) determining the damage grade of each part of the masonry structure building according to the maximum tensile strainfunction. According to the method, the maximum tensile strain and the occurrence position of the maximum tensile strain generated by the masonry structure building under the shield tunnel underneath pass working condition can be accurately determined, so that the damage grade of the building is more finely determined, the method is more accurate and reliable compared with a previous evaluation method, and a reliable basis is provided for safety evaluation and protection of the masonry structure building.

Description

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Claims

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Application Information

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Owner HUNAN UNIV
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