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A temporary support device used in tunnel excavation and its implementation method

A technology for temporary support and tunnel excavation, applied in temporary shields, tunnels, tunnel linings, etc., can solve problems affecting stability and safety, difficulty in installation and disassembly, and increased manpower expenditure to ensure stability and safety, save construction time and cost, and improve the service life of the structure

Active Publication Date: 2021-01-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to install and disassemble such a structure. When dismantling, it is necessary to manually smash the concrete with the help of external force to disassemble the steel arch frame, longitudinal connecting bars and steel mesh one by one, which brings inconvenience to the dismantling. In order to solve this problem The problem is that there are currently some existing technologies that directly use temporary support structures assembled from steel arches, longitudinal connecting bars and reinforcing bar structures, which can avoid spraying concrete, but such structures are also relatively simple. When different construction methods are adopted, the corresponding temporary support structures will also be different. At present, the temporary support structures in the prior art have a single structure and cannot be adjusted. The temporary support structures of each construction method need Specific production, this will increase the expenditure of manpower, because the current existing technology is connected by large steel arches, it is very time-consuming and labor-intensive for personnel to disassemble and install each time, which will not only reduce the construction cost of the tunnel project Due to the repeated installation and disassembly of the temporary support structure, the components between the temporary support structure will be severely worn, which will affect its stability and safety and reduce its service life; in addition, there are some tunnel projects in the Water gushing is easy to occur during construction, but the current temporary support structure has not been equipped with a waterproof mechanism, nor has it been waterproofed during construction. Therefore, there is an urgent need for a flexible adjustment and easy disassembly to save construction time. and cost, and can improve construction efficiency, improve the service life of the entire structure, and also play a waterproof role, and finally can ensure the stability and safety of the temporary support device during the construction process

Method used

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  • A temporary support device used in tunnel excavation and its implementation method
  • A temporary support device used in tunnel excavation and its implementation method
  • A temporary support device used in tunnel excavation and its implementation method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as Figure 1-7As shown, the present invention provides a kind of temporary supporting device, comprises several groups of protective mechanisms, each group of protective mechanisms is detachably connected, and ear plates (not shown in the figure) are installed on two steel frames 1 next to each group of protective mechanisms. display), when it is necessary to use multiple sets of protective mechanisms for splicing, the lug plates can be directly connected with bolts, which not only facilitates installation and disassembly, but also reduces the cost of use; the protective mechanism includes a fixed frame 5, on which the The fixed shaft 2 is disassembled and connected, and the fixed shaft 2 is movably connected with a rotating sleeve 3, and several adjusting plates 6 are movably connected on the rotating sleeve 3, and a slide rail (not shown in the figure) is provided on the rotating sleeve 3, and the adjusting plate 6 is slidingly connected in the rotating sleeve 3 ...

Embodiment 2

[0049] Such as Figure 1-6 Shown in and 8, the present invention also provides a kind of implementation method that adopts above temporary support device, when adopting CD method construction, its implementation comprises the following steps:

[0050] (1) Assembly outside the hole: erect and assemble the prepared steel frame 1, fixed frame 5, fixed shaft 2 and other components outside the hole, first install the fixed shaft 2 on the fixed frame 5, and then install the rotating sleeve 3 Sleeve on the fixed shaft 2, then install the adjustment plate 6 in sequence, and connect the steel frame 1 to the adjustment plate 6 through the fastener 11, and connect several steel frames 1 through the connecting rib 4 to form a preliminary protection mechanism. Since the CD method is used for construction, repeat the above steps to install two sets of preliminary protection mechanisms on the fixed shaft 2;

[0051](2) Adjustment outside the cave: Since the CD method is used for constructio...

Embodiment 3

[0055] Such as Figure 1-6 Shown in and 9, the present invention also provides a kind of implementation method that adopts above temporary support device, when adopting double sidewall pilot pit method construction, its implementation comprises the following steps:

[0056] (1) Assembly outside the hole: erect and assemble the prepared steel frame 1, fixed frame 5, fixed shaft 2 and other components outside the hole, first install the fixed shaft 2 on the fixed frame 5, and then install the rotating sleeve 3 Sleeve on the fixed shaft 2, then install the adjustment plate 6 in sequence, and connect the steel frame 1 to the adjustment plate 6 through the fastener 11, and connect several steel frames 1 through the connecting rib 4 to form a preliminary protection mechanism. Since the double-side wall pilot pit method is used for construction, repeat the above steps to install four sets of preliminary protection mechanisms on the fixed shaft 2;

[0057] (2) Adjustment outside the ...

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PUM

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Abstract

The invention discloses a temporary supporting device which comprises multiple sets of protection mechanisms. The multiple sets of protection mechanisms are detachably connected. Each protection mechanism comprises fixing frames, fixing shafts and rotating sleeves, wherein the rotating sleeves are movably connected with adjusting plates, the adjusting plates are movably connected with steel frames, a connecting bar is detachably connected between the adjacent steel frames, an adjusting strengthening mechanism is detachably installed in the space formed by the steel frames and the connecting bar and comprises a strengthening part and a lifting part, and a waterproof part is detachably connected to the bottoms of the steel frames. By means of the temporary supporting device, adjustment is flexible, in addition, demounting is convenient and fast, the construction time and cost are saved, the construction efficiency can be improved, the service life of a structure is prolonged, a waterproof effect is also achieved, and meanwhile stability and safety in the construction process can be ensured.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a temporary support device used in tunnel excavation and an implementation method thereof. Background technique [0002] Temporary support refers to a temporary support method that takes measures to support the roof in order to prevent rocks from falling during underground operations, so that the construction can continue. [0003] With the continuous development of tunnel engineering, there are more and more long-span tunnels. One-time excavation of large-section tunnels will cause the working face to be exposed for too long, and the load will be released quickly, which will cause instability of the surrounding rock and increase the tunnel construction. Therefore, the idea of ​​excavating tunnels in blocks is becoming more and more popular. Under the poor geological conditions of the surrounding rock, more and more long-span tunnel construction adopts the constructi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D19/00E21D11/38E21F16/02
CPCE21D11/38E21D19/00E21F16/02
Inventor 王薇周旭陶豪杰刘鳌张心源张燕飞
Owner CENT SOUTH UNIV
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