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Void road safety margin evaluation and pre-control method under urban underground construction scene

A technology for underground construction and safety margin, applied in the direction of instrument, geometric CAD, design optimization/simulation, etc., can solve the problems such as the reduction of the support ability of the stratum to the road structure, the economic loss, the bad social impact, etc., and achieve good social and economic benefits. Benefit, the effect of ensuring traffic safety

Active Publication Date: 2021-10-29
SHANDONG UNIV +1
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the original cavity develops catastrophically under the repeated action of underground construction vibration and above-ground traffic load, and the supporting capacity of the strata to the road structure is reduced, resulting in disease or collapse of the road during normal operation, and the road collapse is sudden and harmful. On the one hand, it affects the construction progress of the tunnel below, and on the other hand, it causes the surface traffic to be paralyzed, accompanied by the rupture of underground pipelines, which seriously affects the daily life of urban residents and causes heavy economic losses. great security risk

Method used

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  • Void road safety margin evaluation and pre-control method under urban underground construction scene
  • Void road safety margin evaluation and pre-control method under urban underground construction scene
  • Void road safety margin evaluation and pre-control method under urban underground construction scene

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Experimental program
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Effect test

Embodiment 2

[0070] A ground and underground linkage pre-control method under the TBM construction scenario, in addition to the above-mentioned steps provided in Embodiment 1, also includes step 4: carry out road collapse prevention pre-control design from two levels of ground traffic and underground construction, the details are as follows:

[0071] For surface traffic, according to the established road structure damage criterion, the ground traffic pre-control strategy is determined, including controlling the type of permitted vehicles, the distance between vehicles, and the speed of vehicles on the basis of adding iron plates to the road.

[0072] Here is how the tensile stress at the bottom of the layer is related to the actual anti-collapse design: the road structure failure criterion is based on the tensile stress at the bottom of the pavement structure exceeding the allowable tensile stress. When the tensile strength is insufficient, the pavement structure will be cracked layer by lay...

Embodiment 3

[0075] A safety margin evaluation system for empty roads under urban underground construction scenarios, including:

[0076] The cavity determination module is configured to determine the cavity occurrence form in the road subgrade of the construction section according to the detection results of the target underground engineering area;

[0077] The critical value determination module is configured to use a simulation method to simulate the development process of the cavity under the underground construction vibration, and determine the critical safety distance considering the construction vibration based on the simulated cavity size and position;

[0078] The safety margin estimation module, based on the simulated cavity expansion form, determines the most unfavorable driving load conditions, establishes road damage criteria, determines the actual bearing capacity of the road under the disaster state, and calculates the safety margin of the empty road.

Embodiment 4

[0080] An electronic device includes a memory, a processor, and computer instructions stored in the memory and run on the processor. When the computer instructions are run by the processor, the steps in the method of the first embodiment or the second embodiment above are completed.

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Abstract

The invention provides a void road safety margin evaluation and pre-control method under an urban underground construction scene, wherein the method comprises the steps: obtaining a detection result of a target underground engineering region, and determining a hole occurrence form in a construction section road roadbed; utilizing a simulation method to simulate the development process of the cavity under the underground construction vibration, and determining a critical safety distance considering the construction vibration based on the simulated cavity scale and position; and based on the simulated cavity expansion form, determining the most unfavorable load condition of driving, establishing a road damage criterion, determining the actual bearing capacity of the road in a disaster state, calculating the safety margin of the void road, and further performing overground and underground combined pre-control according to a result. The method ensures the traffic safety of the road network above in the tunneling process of the underground engineering.

Description

technical field [0001] The invention belongs to the technical field of underground engineering, and in particular relates to a safety margin evaluation and pre-control method for empty roads under urban underground construction scenarios. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The number of collapse accidents caused by the construction of underground projects is increasing year by year, and road network interruptions, human and vehicle casualties, etc. caused by underground space disturbances occur from time to time. The impact of underground construction on the urban road network cannot be ignored. [0004] Among the existing tunnel construction methods, TBM construction has the advantages of high degree of mechanization and high construction efficiency, and is widely used in subway tunnel excavation. However, urban subways are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/23G06F111/10G06F119/14
CPCG06F30/13G06F30/23G06F2111/10G06F2119/14Y02T90/00
Inventor 刘人太王孟于婷婷田嘉伟张连震陈新李鸿钊潘旭东闫瑾白继文李卫
Owner SHANDONG UNIV
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