CN210919126U - Tunnel preliminary bracing arch-changing supporting structure - Google Patents
Tunnel preliminary bracing arch-changing supporting structure Download PDFInfo
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- CN210919126U CN210919126U CN202020697686.5U CN202020697686U CN210919126U CN 210919126 U CN210919126 U CN 210919126U CN 202020697686 U CN202020697686 U CN 202020697686U CN 210919126 U CN210919126 U CN 210919126U
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Abstract
The utility model discloses an arch-changing supporting structure for tunnel preliminary bracing, which comprises a square reaction frame, wherein the square reaction frame is connected with a steel arch frame of the preliminary bracing through a plurality of jacks; moving wheels are respectively arranged at the bottoms of the two ends of the square reaction frame and are matched with rails which extend along the advancing direction of the tunnel; the square reaction frames are at least two, the two adjacent square reaction frames are connected with each other through a longitudinal cross rod, and the middle section of the two adjacent square reaction frames is an arch changing operation area. The tunnel primary support arch-changing supporting structure of the utility model is simple and rapid to install, can be freely and flexibly changed, is suitable for tunnels with various shapes, and has strong applicability; the arch replacing support structure for the tunnel primary support is used for replacing the arch, and is simple and easy to operate and high in construction efficiency.
Description
Technical Field
The utility model relates to a tunnel engineering construction technical field especially relates to a tunnel preliminary bracing arch-changing supporting structure.
Background
In tunnel construction, after primary support is carried out, the limit of primary support intrusion often appears for various reasons, and in order to ensure the thickness and the quality of a secondary lining, the primary support is broken and disassembled and arch replacement operation is required.
Because the arch replacing operation of primary support usually adopts a percussion drill and the like to break concrete, the concrete of an operation surface is easy to collapse and an arch frame is easy to collapse, and in order to ensure the safety during arch replacing construction, accurate support and tunnel deformation monitoring are needed to be carried out on an arch replacing interval.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model aims to provide a tunnel preliminary bracing changes encircleing bearing structure, should change the simple swift of encircleing bearing structure installation, can freely change in a flexible way, be adapted to the tunnel of multiple different shapes, the suitability is strong. The arch replacing support structure is used for replacing arches, and is simple and easy to operate, high in construction efficiency and good in safety.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize.
The first technical scheme is as follows:
a tunnel preliminary bracing arch-changing support structure, the tunnel preliminary bracing including a steel arch, comprising: the square reaction frame is connected with the steel arch frame through a plurality of jacks; moving wheels are respectively arranged at the bottoms of the two ends of the square reaction frame and are matched with rails which extend along the advancing direction of the tunnel;
the square reaction frames are at least two, the two adjacent square reaction frames are connected with each other through a longitudinal cross rod, and the middle section of the two adjacent square reaction frames is an arch changing operation area.
The utility model discloses technical scheme one's characteristics lie in with further improvement:
preferably, the square reaction frame is composed of a plurality of vertical rods and cross rods which are connected with each other.
Further preferably, the cross section of pole setting and horizontal pole is square steel pipe, the tip welding of pole setting and horizontal pole has square end plate, pass through between pole setting and the horizontal pole square end plate and bolted connection.
Further preferably, the cross section of the longitudinal cross rod is a square steel pipe, a square end plate is welded at the end part of the longitudinal cross rod, and the longitudinal cross rod is connected with the vertical rod through the square end plate and a bolt.
Further preferably, the moving wheel is arranged at the bottom of the vertical rod.
Preferably, a load sensor is arranged between the jack and the steel arch frame, and a piston rod of the jack is connected with the load sensor through a lead screw.
Preferably, the middle part of the square reaction frame is provided with an infrared distance measuring instrument.
Preferably, a lead screw is arranged between the longitudinal cross rod and the vertical rod and used for adjusting the distance between two adjacent square reaction frames.
Preferably, the jack and the square reaction frame are connected with each other through a connecting hinge.
The second technical scheme is as follows:
a method for replacing an arch by using the tunnel primary support arch replacing support structure comprises the following steps:
and 5, dismounting all jacks of the tunnel primary support arch-changing support structure, moving the tunnel primary support arch-changing support structure, and repeating the steps 2-4.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a tunnel preliminary bracing trades and encircles bearing structure installation simple swift, can freely nimble transform, is adapted to the tunnel of multiple different shapes, and the suitability is strong. The method for replacing the arch by using the tunnel primary support arch replacing support structure is simple and easy to operate, high in construction efficiency and good in safety.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of an embodiment of the support structure for supporting an arch in a tunnel in a preliminary tunnel support according to the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view showing the connection of the supporting rods in the preliminary tunnel support arch-changing supporting structure;
fig. 4 is a schematic connection diagram of a jack and a cross rod in a tunnel primary support arch-changing supporting structure.
In the above fig. 1-4: 1, a square reaction frame; 2, a jack; 3, track; 4, connecting a hinge; 5 moving the wheel; 6, erecting a rod; 7, a cross bar; 8, bolts; 9, a square end plate; 10 longitudinal cross-bars; 11 infrared range finders; 12 a piston rod; 13 leading screw; 14 a load sensor; 15 steel arch frames; 16, a skid; 17 primary support of the tunnel; and (3) secondary lining support of the tunnel.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and 2, the tunnel construction section and structural distribution, a tunnel primary support 17 comprises a steel arch frame 15, the steel arch frame 15 comprises an arch crown, an arch wall and an inverted arch, and a tunnel secondary lining support 18 is cast-in-place reinforced concrete.
Referring to fig. 1 and 2, the embodiment of the utility model provides a tunnel preliminary bracing arch-changing supporting structure, include: the square reaction frame 1, the perimeteric surface of the said square reaction frame 1 is connected with said steel bow member 15 through multiple jacks 2; the bottom at the both ends of square reaction frame 1 is provided with respectively removes wheel 5, removes wheel 5 and installs the locking device, remove wheel 5 and extend the track 3 of arranging along tunnel advancing direction and match each other. The moving wheels 5 move back and forth on the rails 3 to facilitate the overall movement of the arch-changing support structure.
Specifically, square reaction frame 1 comprises a plurality of interconnect's pole setting 6 and horizontal pole 7, and pole setting 6 and horizontal pole 7 have multiple specification, can freely install and the overlap joint a plurality of pole settings 6 and horizontal pole 7 according to the shape change in tunnel and the length of changing the arch operation face, and the efficiency of construction is high.
Referring to fig. 4, the cross sections of the vertical rod 6 and the cross rod 7 are square steel pipes, the end parts of the vertical rod 6 or/and the cross rod 7 are welded with square end plates 9, and the vertical rod 6 and the cross rod 7 are connected through the square end plates 9 and bolts 8.
Referring to fig. 3, the upright 6 and the upright 6 are also connected with each other through a square end plate 9 and a bolt 8 arranged at the end of the upright 6, and the bottom of the upright 6 at the bottom layer at the two ends of the square reaction frame 1 is provided with a moving wheel 5; the ground of the tunnel at the lower end of the square reaction frame 1 is also provided with a skid 16 for supporting the square reaction frame 1. Further, the bottom of the upright 6 at the bottom layer is also provided with a screw 13 for adjusting the distance between the moving wheel 5 and the track 3 or between the upright 6 and the skid 16, so that the square reaction frame 1 is more stable.
In the embodiment of the present invention, the square reaction frame 1 is at least two trusses, the jack 2 on the square reaction frame 1 located at the same truss corresponds to the steel arch 15 supporting the same truss inside the tunnel, and the two adjacent trusses are connected to each other through the longitudinal cross rod 10 between the square reaction frames 1. Referring to fig. 2, the middle section between two adjacent square reaction frames 1 is an arch changing operation area, that is, at least one steel arch 15 to be changed is spaced between two adjacent square reaction frames 1.
Specifically, the cross section of the longitudinal cross rod 10 is a square steel pipe, a square end plate 9 is welded at the end part of the longitudinal cross rod 10, and the longitudinal cross rod 10 is connected with the vertical rod 6 through the square end plate 9 and the bolt 8.
Further, a lead screw is arranged between the longitudinal cross rod 10 and the vertical rod 6, and the distance between two adjacent square reaction frames 1 can be adjusted through the lead screw, so that the tunnel primary support arch-changing supporting structure is more stable.
When the device works, according to the arch changing operation sequence, firstly, the adjacent steel arch frames 15 on two sides of the operation section are supported by the jacks 2 of the supporting structure, then the dismantling of the primary support steel arch frame 15 of the operation section, the expanding excavation of the tunnel soil body, the installation of a new primary support steel arch frame 15 and the spraying of concrete are carried out, the replacement of a certain arch frame is realized, after the primary support is stable, the jacks 2 are unloaded, the square reaction frame 1 moves to the corresponding position of the next stage operation section along the track 3, and the next arch changing construction can be carried out; by circulating in this way, the replacement of the whole ring arch can be realized.
Further, the square reaction frame 1 is connected with the steel arch frame 15 through a plurality of jacks 2 through connecting hinges 4, a load sensor 14 is arranged between the jacks 2 and the steel arch frame 15, and a piston rod 12 of each jack 2 is connected with the load sensor 14 through a lead screw 13; the load sensor 14 can precisely control and monitor the variation of the supporting force of each jack 2, and the lead screw 13 can be used for adjusting the distance between the load sensor 14 and the supporting point of the tunnel.
Furthermore, the infrared distance measuring instrument 11 is arranged in the middle of the square reaction frame 1, so that the change of the displacement of the supporting point can be monitored in real time, the construction danger is prevented, and the safety of arch changing operation is improved.
The utility model also provides an utilize foretell tunnel preliminary bracing to change method that encircles of encircleing bearing structure carries out the arch, including following step:
and 5, dismounting all jacks 2 of the tunnel primary support arch-changing support structure, moving the tunnel primary support arch-changing support structure through the moving wheels 5, and repeating the steps 2-4.
The tunnel primary support arch-changing supporting structure provided by the embodiment of the utility model can flexibly install the lap joint according to the shape of the tunnel, and has strong applicability; meanwhile, the installation is simple and rapid, and the construction efficiency of arch changing operation is obviously improved.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The utility model provides a tunnel preliminary bracing arch support structure that trades, tunnel preliminary bracing contains the steel bow member, its characterized in that includes: the square reaction frame is connected with the steel arch frame through a plurality of jacks; moving wheels are respectively arranged at the bottoms of the two ends of the square reaction frame and are matched with rails which extend along the advancing direction of the tunnel;
the square reaction frames are at least two, the two adjacent square reaction frames are connected with each other through a longitudinal cross rod, and the middle section of the two adjacent square reaction frames is an arch changing operation area.
2. The tunnel preliminary bracing arch-changing support structure of claim 1, wherein the square reaction frame is composed of a plurality of interconnected vertical poles and cross bars.
3. The tunnel preliminary bracing arch-changing supporting structure according to claim 2, wherein the cross section of the vertical rods and the cross rods is square steel pipes, square end plates are welded at the end parts of the vertical rods and the cross rods, and the vertical rods and the cross rods are connected through the square end plates and bolts.
4. The tunnel preliminary bracing arch-changing support structure according to claim 3, wherein the cross section of the longitudinal cross bar is a square steel pipe, a square end plate is welded at the end of the longitudinal cross bar, and the longitudinal cross bar and the vertical rod are connected through the square end plate and a bolt.
5. The tunnel preliminary bracing arch-changing support structure of claim 2, wherein the moving wheels are provided at the bottom of the vertical poles.
6. The tunnel preliminary bracing arch-changing support structure according to claim 1, wherein a load sensor is provided between the jack and the steel arch, and a piston rod of the jack is connected with the load sensor through a lead screw.
7. The tunnel preliminary bracing arch-changing support structure according to claim 1, wherein an infrared distance meter is provided at a middle portion of the square reaction frame.
8. The tunnel preliminary bracing arch-changing supporting structure according to claim 2, wherein a lead screw is provided between the longitudinal cross bar and the vertical bar, and the lead screw is used for adjusting the distance between two adjacent square reaction frames.
9. The tunnel preliminary bracing arch-changing support structure according to claim 1, wherein the jack and the square reaction frame are connected to each other by a connection hinge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020697686.5U CN210919126U (en) | 2020-04-29 | 2020-04-29 | Tunnel preliminary bracing arch-changing supporting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020697686.5U CN210919126U (en) | 2020-04-29 | 2020-04-29 | Tunnel preliminary bracing arch-changing supporting structure |
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| CN210919126U true CN210919126U (en) | 2020-07-03 |
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| CN202020697686.5U Active CN210919126U (en) | 2020-04-29 | 2020-04-29 | Tunnel preliminary bracing arch-changing supporting structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060066A (en) * | 2021-11-25 | 2022-02-18 | 中铁第四勘察设计院集团有限公司 | Assembled stratum stress compensation servo steel frame system for controlling large deformation of tunnel |
-
2020
- 2020-04-29 CN CN202020697686.5U patent/CN210919126U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060066A (en) * | 2021-11-25 | 2022-02-18 | 中铁第四勘察设计院集团有限公司 | Assembled stratum stress compensation servo steel frame system for controlling large deformation of tunnel |
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