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Bridge monitoring and evaluation method for shield tunnel construction under-pass high-speed railway bridge

An evaluation method and technology of shield tunneling, applied in the direction of instruments, data processing applications, resources, etc., can solve problems such as adhesive contamination of track slabs, damage to track slab concrete protective layers, and system errors in optical fiber monitoring results, etc., to achieve automatic Remote monitoring, low cost, comprehensive monitoring effect

Active Publication Date: 2018-12-07
CENT SOUTH UNIV
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Problems solved by technology

Implantable laying cannot be carried out for existing structures; for sensitive buildings or structures such as high-speed rail bridges, the use of adhesive fiber laying methods requires grooves or positioning on the monitoring objects, which may cause damage to the concrete protective layer of the track slab, and The adhesive may contaminate the track board. In addition, the adhesive may expand and contract due to changes in the ambient temperature, which may cause systematic errors in the optical fiber monitoring results.

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  • Bridge monitoring and evaluation method for shield tunnel construction under-pass high-speed railway bridge
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  • Bridge monitoring and evaluation method for shield tunnel construction under-pass high-speed railway bridge

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Embodiment Construction

[0040] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and preferred embodiments, but the protection scope of the present invention is not limited to the following specific embodiments.

[0041] Taking an intercity railway shield tunnel passing under an abandoned high-speed railway bridge in Guangzhou as an example: the construction of an intercity railway shield tunnel passes through the viaduct holes under a certain road, and the buried depth is 13.3-15.7m. The weakly weathered sandy mudstone is easily softened by water, and the overlying soil is mainly silty sand layer and clay layer. The shield section is excavated by two earth pressure balance shield machines with a diameter of 8.84m. An intercity railway shield construction underpasses a viaduct section with a length of about 330m, and passes through two abandoned high-speed railway bridges. The s...

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Abstract

The invention discloses a bridge monitoring and evaluation method for a shield tunnel construction under-pass high-speed railway bridge. The method includes the steps of real-time data acquisition, data sorting, evaluation model establishment, data review and model evaluation result classification. According to the bridge monitoring and evaluation method for the shield tunnel construction under-pass high-speed railway bridge of the invention, after the structure of the bridge is partitioned, acquired data are monitored in real time through a fiber Bragg grating sensor, and the spatial transfercharacteristics of deformation can be visually described; data which can reflect the status of the structure of the bridge are calculated through data sorting; the sorted data are utilized to establish an evaluation model, and warning threshold values are set; data that exceed the warning threshold values are rechecked and confirmed, so that misjudgment can be prevented; and a model evaluation result is obtained according to the evaluation model. The monitoring and evaluation method of the invention has the advantages of comprehensive monitoring scope, high precision, high stability, high efficiency, low cost, and long service life of monitoring equipment, and is suitable for sensitive monitoring objects of large-scale projects and projects that require long-term real-time monitoring. With the method of the invention adopted, automatic remote monitoring can be realized, and the interference of online monitoring work on operating high-speed rails can be reduced.

Description

technical field [0001] The invention belongs to the field of on-site monitoring and evaluation of engineering construction safety, and in particular relates to a bridge monitoring and evaluation method for a bridge passing through a high-speed rail bridge under shield tunnel construction. Background technique [0002] The construction of high-speed rail bridges under tunnels may have adverse effects on the safety of bridge piers and girder structures. Keeping track of the health status of bridge structures is an important prerequisite for ensuring the safety of high-speed rail operations. High-speed railways have high frequency and high speed, and have high requirements for line deformation. The operation of high-speed railways has strict management and control over the deployment of monitoring equipment on beams and rails, which is highly sensitive. [0003] In the routine monitoring of bridges, instruments and equipment such as subsidence meters, inclinometers, total stati...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/08
CPCG06Q10/0639G06Q50/08
Inventor 傅金阳谢佳伟张云毅曾凡轩方星桦阳军生陈宝林叶新田
Owner CENT SOUTH UNIV
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