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Self-adaptive ventilation structure for tunnel construction

A tunnel construction and self-adaptive technology, applied in the ventilation of mines/tunnels, tunnels, mining equipment, etc., can solve the problems of reduced effective ventilation, large channel roughness, and occupation of construction work space, so as to maintain the shape and ventilation area , to ensure the safety and efficiency of construction, and to avoid the effect of water on the top

Active Publication Date: 2021-01-22
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, increasing the cross-sectional area of ​​the construction ventilation pipe is an effective method to increase the ventilation volume of the tunnel face. However, the cross-section of the traditional ventilation pipe is circular, which does not fit very well with the tunnel section. Increasing the area of ​​the ventilation pipe will greatly encroach on the construction site. work space, so the increase in the area of ​​the ventilation pipe section is limited
Isolating a part of the space above the tunnel as a ventilation channel can increase the ventilation flow, but because the closed space is realized by pouring concrete, the channel is rough and prone to air leakage points, which will reduce the effective ventilation rate

Method used

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  • Self-adaptive ventilation structure for tunnel construction
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  • Self-adaptive ventilation structure for tunnel construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] like figure 1 As shown, a self-adaptive ventilation structure for tunnel construction according to the present invention includes an air duct 1, the air duct 1 includes a flexible top surface 11 and a flexible bottom surface 12, and the air duct 1 is connected by a connecting piece At the top of the tunnel 2, the contour of the flexible top surface 11 is adapted to the shape of the inner wall of the top of the tunnel 2, and the connecting members are distributed in several rows at intervals along the longitudinal direction of the tunnel 2, and each row includes Several pendants 3 arranged at intervals in the width direction.

[0036] The flexible top surface 11 and the flexible bottom surface 12 are all air-tight air duct cloths, such as the combination of high-strength polyester fiberglass woven into a coated base cloth and PVC modified as a surface film, or a multi-layer high Shuttle-woven fabrics, laminated fabrics, and windproof composite fabrics can avoid air leak...

Embodiment 2

[0039] A self-adaptive ventilation structure for tunnel construction according to the present invention, its structure is roughly the same as that of Embodiment 1, the difference is that further, in order to effectively maintain the channel shape and ventilation area of ​​the air duct 1 , to avoid setting the bottom support, reduce the installation process in the tunnel, the air duct 1 can also be connected with a skeleton, the skeleton is used to support the flexible top surface 11 and the flexible bottom surface 12, and the skeleton includes several cross-sectional skeletons 111 And the connecting skeleton 112 between two adjacent section skeletons 111 .

[0040] like figure 2 As shown, the connecting skeleton 112 includes a first steel wire and a second steel wire, and can also be replaced with other elongated metal members with deformability. The first steel wire is arranged along the flexible top surface 11 and cross-connects two adjacent The two ends of the bottom of e...

Embodiment 3

[0044] A self-adaptive ventilation structure for tunnel construction according to the present invention, its structure is roughly the same as that of Embodiment 1, the difference is that, as Figure 4 As shown, it also includes a support member, which is used to support the air duct 1, and the support member includes brackets 4 arranged on both sides of the tunnel 2, and the brackets 4 are distributed longitudinally along the tunnel 2 at intervals. The support 4 is connected to the tunnel 2 through tension bars or anchor rods, and the support 4 can be an angle steel member. Since the bracket 4 is provided, the stability of the air duct 1 can be improved, therefore, the framework in the second embodiment is not required, which is beneficial to reduce the weight of the air duct 1 .

[0045] like Figure 5 As shown, the supporting part also includes a crossbeam 5 between the two opposite brackets 4, and the crossbeam 5 can also be a steel member, which is conducive to stable sup...

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Abstract

The invention relates to the technical field of tunnel ventilation, and particularly discloses a self-adaptive ventilation structure for tunnel construction. The self-adaptive ventilation structure comprises an air pipe, wherein the air pipe comprises a flexible top surface and a flexible bottom surface, the outline of the flexible top surface is matched with the shape of the inner wall of the topof a tunnel, the flexible top surface is connected to the top of the tunnel through connecting pieces, a plurality of rows of connecting pieces are distributed at intervals in the longitudinal direction of the tunnel, and each row comprises a plurality of hanging pieces arranged at intervals in the width direction of the flexible top surface. The ventilation section can be increased within the limited height, the space utilization rate is high, the construction operation space is not occupied, the construction safety and efficiency are guaranteed, the air pipe has a certain deformation space,the shape and the ventilation area of a channel can be effectively kept, water accumulation on the top face of the air pipe can be avoided, the air inlet amount can be finely adjusted by adjusting the distance between every two adjacent hanging pieces, the problem that large air amount is needed for high-altitude tunnel construction is solved, and the complex environment requirement of tunnel construction is met.

Description

technical field [0001] The invention relates to the technical field of tunnel ventilation, in particular to an adaptive ventilation structure for tunnel construction. Background technique [0002] In recent years, the construction of tunnels in the western plateau area of ​​my country has developed rapidly. The western area is mountainous and has a high altitude, and many high-altitude super-long tunnels have appeared. In the process of tunnel construction in high-altitude areas, the most important problem is the construction ventilation problem. Due to the low oxygen content and low air pressure in the air at high altitudes, and most of the construction workers come from plain areas, they have poor adaptability to low-oxygen environments and are more sensitive to harmful gases. The external environment is even worse, which will easily lead to a decrease in the work efficiency of construction personnel. Therefore, the air volume required for construction ventilation will b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F1/04E21F17/00E21D9/14
CPCE21F1/04E21F17/00E21D9/14
Inventor 郑长青范雲鹤陶伟明黎旭赵万强曹彧刘祥汤印任小川谭永杰刘金松徐郅崴曾勤
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD