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A pneumatic trigger device and method for shield tunnel geological evaluation

A technology of shield tunneling and triggering devices, applied in tunnels, measuring devices, seismology, etc., can solve problems such as disasters and risks, difficulty in ensuring shock force, and effective arrangement of auxiliary equipment, so as to avoid potential safety hazards and space problems , Eliminate the problem of inaccurate coordinate positioning and reduce the effect of interference

Active Publication Date: 2021-11-19
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the construction of subway lines, it is inevitable to pass through unfavorable strata such as karst development areas, broken zones, and cracks. These unfavorable strata make the construction more unknown and bring great disasters and risks.
If the evaluation cannot be predicted in advance, it will bring immeasurable loss and damage to the construction unit, buildings along the line and residents
[0004] The inventors found that the current survey methods are ground survey and real-time advanced survey in the tunnel. Due to the closed environment of the shield tunnel, the geological disaster survey in the cave is more complicated than that in the drill-and-blast tunnel.
Based on this, aiming at disaster sources such as boulders, abrupt strata, karst caves, silty soft interlayers, and broken zones in the rock and soil layers of urban subway construction areas, the excitation of seismic waves is realized by means of active excitation, and the emission signals of seismic waves are obtained for analysis. , to complete the work of real-time advance detection; however, when the power source such as hydraulic pressure and voltage used in the traditional way drives the shock element, if the intermittent prompt is guaranteed, it is difficult to guarantee the shock force and it is difficult to achieve the effect of prompt firing. For hydraulic source, electric drive In order to achieve the instant firing effect, the vibration method often requires a large number of auxiliary equipment to be arranged. However, inside the shield machine, the application space in the shield tail shell is narrow, and it is difficult to effectively arrange auxiliary equipment. Therefore, it is limited by the number of vibration components. excitation ability, it is difficult to meet the demand for shocking seismic waves for real-time advance exploration

Method used

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  • A pneumatic trigger device and method for shield tunnel geological evaluation

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Effect test

Embodiment 1

[0036] In a typical implementation of the present disclosure, such as figure 1 As shown, a pneumatic trigger device for geological evaluation of shield tunnels is proposed.

[0037] It includes multiple hammering mechanisms arranged in the circumferential direction at the tail of the shield. Each hammering mechanism is connected to the air source through the air supply mechanism. The hammering mechanism includes an air hammer, a power chamber for the air hammer and a return spring. The air hammer Slidingly installed on the opening of the shield tail shell, the power air chamber is connected to the air supply mechanism, and cooperates with the return spring to change the movement of the driving air hammer to change the relative position of the air hammer and the shield tail;

[0038] As for the specific structure of the hammering mechanism, it is mainly composed of an air storage chamber 4, a power air chamber 5, an impact air hammer 6, a shield shell fixing plate 9, a sealing ...

Embodiment 2

[0056] In another typical implementation of the present disclosure, such as figure 1 As shown, a shield tunnel geological evaluation detection method is given.

[0057] Include the following steps:

[0058] A single group of multiple hammering mechanisms distributed along the circumferential direction is arranged at the hinge position of the shield tail, and the hammering mechanisms are connected to the air source of the shield machine through the air supply mechanism;

[0059] After the tunneling of the first ring of the shield machine is completed, the gas supply mechanism obtains the pressure of the gas source and outputs the output to excite the hammering mechanism, and the air hammer passes through the shield tail shell to instantaneously strike the surrounding rock to generate seismic waves, and collect seismic wave reflection signals;

[0060] Repeat the segment assembly and the next excavation, and after the next excavation is completed, repeatedly excite the hammerin...

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Abstract

The disclosure provides a pneumatic triggering device and method for geological evaluation of shield tunnels, which relate to the field of tunnel construction detection, including multiple hammering mechanisms arranged in the circumferential direction at the tail of the shield, and each hammering mechanism is connected through an air supply mechanism The air source, the hammering mechanism includes an air hammer, a power air chamber for the air hammer and a return spring. The air hammer is slidably installed on the opening of the shield tail shell. Movement to change the relative position of the air hammer and the tail of the shield, by using the air source inside the shield machine as the power source of the shock mechanism, and connecting the air source and the hammer mechanism with the air supply mechanism, the air pressure trigger directly uses the The gas source is supplied to realize equal-pressure operation, which not only ensures the impact force, but also ensures its intermittent promptness, and meets the needs of exciting seismic waves for advanced detection in the tunnel.

Description

technical field [0001] The disclosure relates to the field of tunnel construction detection, in particular to a pneumatic trigger device and method for geological evaluation of shield tunnels. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] During the construction of subway lines, it is inevitable to pass through unfavorable strata such as karst development areas, broken zones, and fissures. These unfavorable strata make the construction more unknown and bring great disasters and risks. If the evaluation cannot be predicted in advance, it will bring immeasurable loss and damage to the construction unit, buildings along the line and residents. [0004] The inventors found that the current survey methods are ground survey and real-time advanced survey in the tunnel. Due to the closed environment of the shield tunnel, the geological disast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/133E21D9/06E21D9/00
CPCE21D9/003E21D9/06G01V1/133
Inventor 李利平熊逸凡薛志超王旌李术才陈鲁川巴兴之房忠栋陆由付张益杰
Owner SHANDONG UNIV
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