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Safety management system for shield underneath pass

一种安全管理、盾构的技术，应用在盾构下穿的安全管理系统领域，能够解决开裂、结构物薄弱部位监测效果不佳、地表倾斜等问题

Pending Publication Date: 2021-07-23
BEIJING UNI-CONSTR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) Surface subsidence will cause the structure to sink as a whole;
[0009] (2) Uneven settlement will lead to surface inclination, so that structures are prone to structural damage and cracks;
[0012] 2. Impact of shield construction on underground pipelines
[0014] (2) It is easy to distort and even crack the pipe
[0015] (3) Excessive tension and compression will cause leakage or even disengagement of pipe joints
[0016] (4) Large axial shear force or bending moment will cause transverse cracks in the pipeline
However, under different engineering conditions, the damage types and risks of structures are different, and the arrangement of monitoring points based on experience often cannot monitor the most dangerous parts. However, there are still the following deficiencies: the monitoring effect of the weak parts of the structure is not good or the structure has already been damaged but has not been monitored (such as cracks in the corner of the wall)

Method used

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  • Safety management system for shield underneath pass
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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Numerical analysis model is a mathematical model based on finite element method simulation that is widely used in engineering fields such as hydraulic engineering, civil engineering, mechanical engineering, bridge engineering, and metallurgical engineering. It is mainly a numerical technique for solving approximate solutions of partial differential equation boundary value problems. Since most practical problems are difficult to obtain accurate solutions, finite element not only has high calculation accuracy, but also can adapt to various complex shapes, so it has become an effective method. engineering analysis tools. For example, in tunneling under the shield, the numerical analysis method can simulate the influence of different tunneling speeds of the shield machine 300 on the disturbance of the adjacent soil. Numerical analysis can use existing numerical analysis platforms, such as finite element analysis platforms such as ANSYS, ABAQUS, FLAC-3D, LS-Dyna and MIDAS / GT...

Embodiment 2

[0063] This embodiment may be a further improvement and / or supplement to Embodiment 1, and repeated content will not be repeated here. In the case of no conflict or contradiction, the whole and / or part of the content of the preferred implementations of other embodiments may serve as supplements to this embodiment.

[0064] Preferably, the influence of the physical properties of the stratum surrounding the tunnel to be built on the deformation of the structure 200 is preliminarily analyzed based on a numerical analysis model. During the construction of shield tunneling, the strata encountered are mostly loose soil, clay, silt, sand and pebbles, etc. or a combination of several types. These formations will have a large displacement after the tunnel is formed by the shield, and most studies have shown that the formation factor is one of the more significant factors for the deformation of the structure 200 . Therefore, the numerical analysis results of this embodiment will be ana...

Embodiment 3

[0068] This embodiment may be a further improvement and / or supplement to Embodiments 1 and 2, and the repeated content will not be repeated. In the case of no conflict or contradiction, the whole and / or part of the content of the preferred implementations of other embodiments may serve as supplements to this embodiment.

[0069] The deformation rate threshold can be set at least in the following manner: based on numerical analysis results, the sinking curve of the structure 200 during the simulated tunneling of the shield tunnel is obtained. Among the numerical analysis results, a displacement curve of the center of gravity of the research structure 200 can be obtained. Then, according to the traveling path of the shield cutter head and the rule of the sinking curve, the sinking curve can be divided into early sinking curve, mid-term sinking curve and late sinking curve. The initial sinking curve corresponds to the stage when the shield cutter head does not pass through the s...

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Abstract

The invention relates to a safety management system for shield underneath pass. The safety management system can be used for arranging monitoring points for collecting characteristic parameters capable of representing deformation of a structure in site construction, a monitoring center is established, and the monitoring center outputs actual safety evaluation capable of being used for evaluating the safety of the structure according to monitoring data fed back by the monitoring points. According to the safety management system for shield underneath pass, different monitoring points can be arranged at different positions based on a numerical analysis result, the position can be monitored in a targeted mode, deformation monitoring of a structure is facilitated, and therefore construction parameters can be adjusted; and monitoring points with different monitoring densities / different monitoring numbers can be arranged according to stress / displacement levels reflected by numerical analysis, and key monitoring on key parts is implemented.

Description

[0001] This invention is a divisional application with the application number 201911091899.1, the application date is November 11, 2019, the application type is invention, and the application name is a deformation control method and evaluation system for a structure passing under a shield. technical field [0002] The invention relates to the technical field of tunnel engineering, in particular to a safety management system for shield tunneling. Background technique [0003] As an important part of urban underground space, urban subway has achieved large-scale development in our country. In addition to underground railways, major cities are successively building various underground tunnels such as urban road tunnels, railway tunnels, municipal tunnels, civil air defense tunnels, and power cable tunnels to solve the increasingly serious problem of urban space congestion. However, in the process of urban construction of tunnels, due to the limitations of geological conditions ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/093E21D9/00E21F17/18
CPCE21D9/093E21D9/003E21F17/18
Inventor 邢颖张功张鹏远黄雪梅杨纬华付春青田世文高玉春
Owner BEIJING UNI-CONSTR GRP CO LTD