CN214464253U - Guide hole and main hole just prop up shaped steel bow member connection structure in double arch tunnel - Google Patents
Guide hole and main hole just prop up shaped steel bow member connection structure in double arch tunnel Download PDFInfo
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- CN214464253U CN214464253U CN202120644654.3U CN202120644654U CN214464253U CN 214464253 U CN214464253 U CN 214464253U CN 202120644654 U CN202120644654 U CN 202120644654U CN 214464253 U CN214464253 U CN 214464253U
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Abstract
The utility model discloses a pilot tunnel and main hole just supported shaped steel bow member connection structure in the double arch tunnel, it includes that the well pilot tunnel shaped steel bow member and middle partition wall that the well pilot tunnel department was equipped with, be equipped with main hole just supported shaped steel bow member at the both ends of well pilot tunnel shaped steel bow member, be equipped with the thrust sharing structure of sharing main hole thrust at the connection end of main hole just supported shaped steel bow member and well pilot tunnel shaped steel bow member, the thrust sharing structure butt joint end fixed connection of adjacent main hole just supported shaped steel bow member; the utility model discloses the thrust of sharing main hole centering partition wall in coordination can weaken the influence of concentration point thrust centering partition wall, is favorable to resisting the loose migration that leads to main hole type steel bow member to erect the back loose and move down of the infinitesimal packing of middle partition wall top concrete.
Description
Technical Field
The utility model relates to a pilot tunnel and main hole just prop up shaped steel bow member connection structure in even encircleed tunnel belongs to tunnel engineering and supports technical field.
Background
The multi-arch tunnel construction process adopts a construction method that a middle pilot tunnel is firstly excavated, then a middle partition wall is poured in sections, and then a left main tunnel and a right main tunnel are successively excavated. Under the construction process, the applicant finds that the existing support technology has the defects which are specifically shown as follows: firstly, the concrete poured mid-partition wall top is difficult to fill densely, and after the main tunnel primary support steel arch is erected on the mid-pilot tunnel steel arch, the loose and downward movement of the main tunnel primary support steel arch is easily caused by the uncompacted mid-partition wall; secondly, lateral thrust caused by staggered excavation of main holes on two sides of the intermediate wall is too concentrated, the concentrated thrust acts on the middle pilot tunnel type steel arch through the main hole primary support type steel arch, the thrust acts on a concrete poured intermediate wall through the middle pilot tunnel type steel arch, and the concentrated thrust is easy to cause concrete at an acting point to crack and fall off; thirdly, the primary support steel arch truss of the main tunnel acts on the middle wall, and an effective cooperative support structure cannot be formed.
Based on this, what is needed now is a pilot tunnel and main hole primary support type steel bow member connection structure in the double arch tunnel, and the thrust of main hole centering partition wall that can be in coordination shares, can weaken the influence of concentration point thrust centering partition wall, is favorable to resisting to the loose removal that leads to main hole type steel bow member to erect back that the partition wall crown concrete filling is not closely knit.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide a connecting structure of a pilot tunnel and a main tunnel primary support type steel arch in a multi-arch tunnel, which can cooperatively share the thrust of the main tunnel to a partition wall, can weaken the influence of the thrust of a concentration point on the partition wall, and is favorable for resisting the loose and downward movement of the main tunnel type steel arch after the erection of the main tunnel type steel arch caused by the incompact filling of concrete at the top of the partition wall; the defects of the prior art can be overcome.
The technical scheme of the utility model is that: a connecting structure of a pilot tunnel and a main tunnel primary support type steel arch in a multi-arch tunnel comprises a middle pilot tunnel type steel arch and a middle partition wall, wherein the middle pilot tunnel type steel arch and the middle partition wall are arranged at the middle pilot tunnel, main tunnel primary support type steel arches are arranged at two ends of the middle pilot tunnel type steel arch, a thrust sharing structure for sharing thrust of a main tunnel is arranged at the connecting end of the main tunnel primary support type steel arch and the middle pilot tunnel type steel arch, and the butt joint ends of the thrust sharing structures of the adjacent main tunnel primary support type steel arches are fixedly connected.
The thrust sharing structure is characterized in that the end plate is arranged at the end part of the primary support steel arch centering of the main tunnel, the butt joint ends of the end plates of the primary support steel arch centering of the adjacent main tunnel are welded and fixed, and the end plates are welded with the middle pilot tunnel steel arch centering.
The contact surface of the end plate and the middle pilot tunnel type steel arch is of an arc-shaped structure and is mutually attached to the arc-shaped upper surface of the middle pilot tunnel type steel arch.
The end plate and the primary support steel arch of the main tunnel are integrally formed.
Compared with the prior art, the utility model discloses pilot tunnel and main hole just prop up shaped steel bow member connection structure in the double-arch tunnel, it includes that well pilot tunnel shaped steel bow member and middle partition wall that well pilot tunnel department was equipped with, is equipped with main hole just prop up shaped steel bow member at the both ends of well pilot tunnel shaped steel bow member, is equipped with the thrust sharing structure who shares main hole thrust at the link of main hole just prop up shaped steel bow member and well pilot tunnel shaped steel bow member, the thrust sharing structure butt joint end fixed connection of adjacent main hole just prop up shaped steel bow member; structure like this, through mutual thrust sharing structure, can carry out whole sharing in coordination with the concentrated effort weakening of main hole centering pilot tunnel type steel bow member through thrust sharing structure, thereby can weaken the influence of concentration point thrust centering partition wall like this, simultaneously, disperse thrust through thrust sharing structure, also be favorable to resisting the loose removal of the incompact back that leads to main hole type steel bow member to erect of mid-wall top concrete filling and move down.
Thrust sharing structure is the end plate that is equipped with at main hole primary steel bow member tip, the end plate butt joint end welded fastening of adjacent main hole primary steel bow member, end plate and well pilot tunnel shaped steel bow member welding, this is one of them structure of thrust sharing structure, but also do not confine to this structure, can increase the effective area that main hole shaped steel bow member acted on the mid-board in the continuous tunnel construction like this through the end plate, the influence of weakening concentration point thrust centering partition wall, end plate butt joint end welded fastening is favorable to sharing thrust in coordination.
The contact surface of end plate and well pilot tunnel shaped steel bow member is arc structure and laminates each other with the arc upper surface of well pilot tunnel shaped steel bow member, is favorable to the surface contact of end plate and arc structure like this each other.
The end plate and the main hole primary support steel arch are integrally formed, so that the stability between the end plate and the main hole primary support steel arch can be improved.
Drawings
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, in which:
fig. 1 is a front view structure diagram of the present invention.
Fig. 2 is a schematic perspective view of the present invention.
Fig. 3 is a schematic view of the connection structure of the primary support steel arch frame and the upper end plate thereof in the main tunnel of the present invention.
Wherein, the middle pilot tunnel section steel arch center 1; an intermediate wall 2; a main hole primary support steel arch 3; and an end plate 4.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for purposes of illustration only and are not intended to limit the scope of the present invention.
The thrust sharing structure is an end plate 4 arranged at the end part of the primary support steel arch centering of the main tunnel, the butt joint ends of the end plates 4 of the primary support steel arch centering 3 of the adjacent main tunnel are welded and fixed, and the end plate 4 is welded with the middle pilot tunnel steel arch centering 1.
The contact surface of the end plate 4 and the middle pilot tunnel type steel arch 1 is of an arc structure and is mutually attached to the arc upper surface of the middle pilot tunnel type steel arch 1.
The end plate 4 and the main hole primary support steel arch 3 are integrally formed.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (4)
1. The utility model provides a pilot tunnel and main hole just prop up shaped steel bow member connection structure in even encircleed tunnel, it includes well pilot tunnel shaped steel bow member (1) and partition wall (2) that well pilot tunnel department was equipped with, is equipped with main hole just prop up shaped steel bow member (3) at the both ends of well pilot tunnel shaped steel bow member (1), its characterized in that: the thrust sharing structure for sharing the thrust of the main tunnel is arranged at the connecting end of the main tunnel primary support type steel arch (3) and the middle pilot tunnel type steel arch (1), and the butt joint ends of the thrust sharing structures of the adjacent main tunnel primary support type steel arches (3) are fixedly connected.
2. The multi-arch tunnel pilot tunnel and main tunnel primary support steel arch connecting structure of claim 1, wherein: thrust sharing structure is end plate (4) that are equipped with at main hole primary support shaped steel bow member (3) tip, and end plate (4) butt joint end welded fastening of adjacent main hole primary support shaped steel bow member (3), end plate (4) and well pilot tunnel shaped steel bow member (1) welding.
3. The multi-arch tunnel pilot tunnel and main tunnel primary support steel arch connecting structure of claim 2, wherein: the contact surface of the end plate (4) and the middle pilot tunnel type steel arch (1) is of an arc-shaped structure and is mutually attached to the arc-shaped upper surface of the middle pilot tunnel type steel arch (1).
4. The preliminary supporting steel arch connecting structure of the pilot tunnel and the main tunnel in the multi-arch tunnel according to any one of claims 2 or 3, wherein: the end plate (4) and the primary support steel arch frame (3) of the main tunnel are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120644654.3U CN214464253U (en) | 2021-03-30 | 2021-03-30 | Guide hole and main hole just prop up shaped steel bow member connection structure in double arch tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120644654.3U CN214464253U (en) | 2021-03-30 | 2021-03-30 | Guide hole and main hole just prop up shaped steel bow member connection structure in double arch tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214464253U true CN214464253U (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120644654.3U Active CN214464253U (en) | 2021-03-30 | 2021-03-30 | Guide hole and main hole just prop up shaped steel bow member connection structure in double arch tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214464253U (en) |
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2021
- 2021-03-30 CN CN202120644654.3U patent/CN214464253U/en active Active
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