CN214247367U - Loess tunnel excavation preliminary bracing structure - Google Patents
Loess tunnel excavation preliminary bracing structure Download PDFInfo
- Publication number
- CN214247367U CN214247367U CN202023295016.XU CN202023295016U CN214247367U CN 214247367 U CN214247367 U CN 214247367U CN 202023295016 U CN202023295016 U CN 202023295016U CN 214247367 U CN214247367 U CN 214247367U
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- top cover
- tunnel excavation
- supporting rod
- loess tunnel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses a loess tunnel excavation preliminary bracing structure, comprising a base plate, the first bracing piece of last fixed surface of bottom plate is connected with, the upper end of first bracing piece is provided with a telescopic cylinder, telescopic cylinder's upper end is provided with the second bracing piece, the upper end of second bracing piece is provided with down the connection pad, the upper surface of connection pad is provided with the connection pad down, the last fixed surface of going up the connection pad is connected with the overhead guard, the positive fixedly connected with fixed block of overhead guard, one side fixedly connected with pivot of fixed block, the outer wall of pivot rotates and is connected with the card key, the inside of overhead guard is provided with the cavity, the inner wall fixedly connected with pneumatic cylinder of cavity, the one end of pneumatic cylinder is provided with the hydraulic stem, the upper end fixedly connected with locating pin of hydraulic stem. The utility model discloses in, effectual to strutting of initial stage excavation, convenient to detach in addition, the stability of strutting is strong.
Description
Technical Field
The utility model relates to a tunnel support technical field especially relates to a loess tunnel excavation preliminary bracing structure.
Background
Tunnels are engineering structures buried in the ground and are a form of human use of underground space. The tunnel can be divided into a traffic tunnel, a hydraulic tunnel, a municipal tunnel, a mine tunnel and a military tunnel, and the tunnel conference held by the international economic cooperation and development organization in 1970 integrates various factors, and the definition of the tunnel is as follows: "a cavity with a cross section area larger than 2 square meters is built under the ground by any method according to a specified shape and size in a certain application.
Present tunnel need be strutted it at the initial stage of excavation, and dismantlement around most supporting construction of present is not convenient for use, and this transportation after just using the completion brings the influence, and most of supporting construction and loess's connection are not inseparable in addition, and this stability that will lead to supporting construction is poor, and finally, because the position of contact of supporting construction and loess is the curved surface, this also easily leads to supporting construction fracture because of its summit atress is too big, thereby influence and strut.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a loess tunnel excavation preliminary bracing structure.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the loess tunnel excavation primary support structure comprises a bottom plate, wherein a first supporting rod is fixedly connected to the upper surface of the bottom plate, a telescopic cylinder is arranged at the upper end of the first supporting rod, a second supporting rod is arranged at the upper end of the telescopic cylinder, a lower connecting disc is arranged at the upper end of the second supporting rod, an upper connecting disc is arranged on the upper surface of the lower connecting disc, a top cover is fixedly connected to the upper surface of the upper connecting disc, a fixed block is fixedly connected to the front surface of the top cover, a rotating shaft is fixedly connected to one side of the fixed block, and a clamping key is rotatably connected to the outer wall of the rotating shaft;
the upper fixed surface of going up the connection pad is connected with the floor, the one end fixedly connected with crossbeam of floor, the terminal surface of crossbeam and the inboard fixed connection of overhead guard are in the same place, the upper fixed surface of crossbeam is connected with shock attenuation telescopic link, shock attenuation telescopic link's upper end is provided with solid fixed cylinder, gu fixed cylinder's upper fixed surface is connected with the beaded finish, the inside of overhead guard is provided with the cavity, the inner wall fixedly connected with pneumatic cylinder of cavity, the one end of pneumatic cylinder is provided with the hydraulic stem, the upper end fixedly connected with locating pin of hydraulic stem.
As a further description of the above technical solution:
one side of first bracing piece and the upper surface of bottom plate all are provided with the backing plate, one side fixedly connected with strengthening rib of backing plate.
As a further description of the above technical solution:
the surface of backing plate is provided with fixing bolt, the backing plate passes through fixing bolt and bottom plate and first bracing piece fixed connection together.
As a further description of the above technical solution:
the surface of the telescopic cylinder is provided with a positioning hole, and the second supporting rod is connected with the telescopic cylinder in a sliding mode.
As a further description of the above technical solution:
the outer surface of the top cover is provided with a through hole, and the diameter of the positioning pin is the same as that of the through hole.
As a further description of the above technical solution:
the upper connecting disc is fixedly connected with the lower connecting disc through a clamping key, and the cross section of the top cover is in a semicircular ring shape.
As a further description of the above technical solution:
the ribbed slabs are distributed in axial symmetry relative to the top cover, and reinforcing rods are fixedly connected among the ribbed slabs.
As a further description of the above technical solution:
the inner surfaces of the reinforcing ring and the top cover are fixedly connected together, and the section of the reinforcing ring is in a semicircular shape.
The utility model discloses following beneficial effect has:
1. the utility model discloses in, set up the connection pad between overhead guard and second bracing piece and assemble overhead guard and second bracing piece through the card key, conveniently dismantle the transportation around convenient to use to overhead guard and second bracing piece.
2. The utility model discloses in, link to each other its and shock attenuation telescopic link at the inboard installation beaded finish of overhead guard, can consolidate the extreme point of overhead guard on the one hand, on the other hand also can play a cushioning effect to the overhead guard, avoids the overhead guard atress too big fracture that leads to.
3. The utility model discloses in, set up the cavity and set up the pneumatic cylinder in it and drive the locating pin and go up and down in the inside of overhead guard, can insert the locating pin in the loess after the top cap installation is accomplished to strengthen the connection of overhead guard and loess, improved the stability of overhead guard.
4. The utility model discloses in, connect first bracing piece and second bracing piece through a telescopic cylinder, be convenient for highly adjust the overhead guard, connect through the strengthening rib at the bottom mounting plate of bracing piece in addition, can avoid the bracing piece direct and ground contact, lead to the bracing piece to be absorbed in ground and influence the supporting effect.
Drawings
Fig. 1 is a schematic structural view of a loess tunnel excavation primary support structure provided by the utility model;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is an enlarged view at B of FIG. 1;
fig. 4 is the utility model provides a partial stereogram of loess tunnel excavation primary support structure.
Illustration of the drawings:
1. a base plate; 2. a first support bar; 3. reinforcing ribs; 4. a base plate; 5. a telescopic cylinder; 6. a second support bar; 7. a top cover; 8. a rib plate; 9. a cross beam; 10. a reinforcement ring; 11. a fixed cylinder; 12. a shock-absorbing telescopic rod; 13. a cavity; 14. positioning pins; 15. a hydraulic lever; 16. a hydraulic cylinder; 17. a rotating shaft; 18. a fixed block; 19. a card key; 20. an upper connecting disc; 21. and (4) a lower connecting disc.
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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-4, the present invention provides an embodiment: a loess tunnel excavation primary support structure comprises a base plate 1, wherein a first supporting rod 2 is fixedly connected to the upper surface of the base plate 1, a base plate 4 is arranged on one side of the first supporting rod 2 and the upper surface of the base plate 1, a reinforcing rib 3 is fixedly connected to one side of the base plate 4, a fixing bolt is arranged on the surface of the base plate 4, the base plate 4 is fixedly connected with the base plate 1 and the first supporting rod 2 through the fixing bolt, a telescopic cylinder 5 is arranged at the upper end of the first supporting rod 2, a second supporting rod 6 is arranged at the upper end of the telescopic cylinder 5, the first supporting rod 2 and the second supporting rod 6 are connected through the telescopic cylinder 5, the height of a top cover 7 can be conveniently adjusted, so that the top cover 7 can reach a proper position, in addition, the base plate 1 is arranged at the bottom end of the supporting rod and is connected through the reinforcing rib 3, the supporting rod can be prevented from directly contacting with the ground, and the supporting rod is prevented from sinking into the ground, thereby influencing the supporting effect, the surface of the telescopic cylinder 5 is provided with a positioning hole, the second support rod 6 is connected with the telescopic cylinder 5 in a sliding way, the upper end of the second support rod 6 is provided with a lower connecting disc 21, the upper surface of the lower connecting disc 21 is provided with an upper connecting disc 20, the upper surface of the upper connecting disc 20 is fixedly connected with a top cover 7, a connecting disc is arranged between the top cover 7 and the second support rod 6, the top cover 7 and the second support rod 6 are assembled through a clamping key 19, the top cover 7 and the second support rod 6 are convenient to disassemble, the transportation before and after use is convenient, the cross section of the top cover 7 is in the shape of a semicircular ring, the front surface of the top cover 7 is fixedly connected with a fixed block 18, one side of the fixed block 18 is fixedly connected with a rotating shaft 17, the outer wall of the rotating shaft 17 is rotatably connected with the clamping key 19, and the upper connecting disc 20 is fixedly connected with the lower connecting disc 21 through the clamping key 19;
the upper surface of the upper connecting disc 20 is fixedly connected with ribbed plates 8, the ribbed plates 8 are distributed in axial symmetry about the top cover 7, reinforcing rods are fixedly connected between the ribbed plates 8, one end of each ribbed plate 8 is fixedly connected with a cross beam 9, the end surface of each cross beam 9 is fixedly connected with the inner side of the top cover 7, the upper surface of each cross beam 9 is fixedly connected with a damping telescopic rod 12, the upper end of each damping telescopic rod 12 is provided with a fixing cylinder 11, the upper surface of each fixing cylinder 11 is fixedly connected with a reinforcing ring 10, the reinforcing rings 10 are fixedly connected with the inner surface of the top cover 7, the reinforcing rings 10 are arranged on the inner side of the top cover 7 and are connected with the damping telescopic rods 12, on one hand, the end points of the top cover 7 can be reinforced, on the other hand, the top cover 7 can also have a buffering effect, the top cover 7 is prevented from being broken due to overlarge stress, the sectional shape of the reinforcing rings 10 is a semicircular ring, a cavity 13 is arranged inside the top cover 7, inner wall fixedly connected with pneumatic cylinder 16 of cavity 13, the one end of pneumatic cylinder 16 is provided with hydraulic stem 15, the upper end fixedly connected with locating pin 14 of hydraulic stem 15, inside at overhead guard 7 sets up cavity 13 and set up pneumatic cylinder 16 in it and drive locating pin 14 and go up and down, can insert locating pin 14 in the loess after the installation of overhead guard 7 is accomplished, thereby strengthen the connection of overhead guard 7 and loess, the stability of overhead guard 7 has been improved, the surface of overhead guard 7 is provided with the through-hole, the diameter of locating pin 14 is the same with the diameter of through-hole.
The working principle is as follows: firstly, a bottom plate 1 and a first supporting rod 2 are assembled through a base plate 4, then the first supporting rod 2, a second supporting rod 6 and a telescopic cylinder 5 are installed together, then an upper connecting disc 20 and a lower connecting disc 21 are fixed through a clamping key 19, the assembly of a top cover 7 and the supporting rods is completed, after the assembly is completed, the top cover is placed at a proper position, then the height of the supporting rods is adjusted through the telescopic cylinder 5, after the top cover 7 reaches the proper position, the supporting rods are fixed through positioning holes in the surface of the telescopic cylinder 5, finally, a hydraulic cylinder 16 is operated to drive a hydraulic rod 15 to move, so that a positioning pin 14 is inserted into loess, the initial support of the excavation of a loess tunnel is completed, after the use is completed, the positioning pin 14 is firstly withdrawn, then the height of the top cover 7 is adjusted through the telescopic cylinder 5, after the top cover 7 is separated from the loess, the top cover 7 and the supporting rods are disassembled through the clamping key 19, and then the first supporting rod 2 and the second supporting rod 6 are separated, and the disassembly is completed.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (8)
1. The utility model provides a loess tunnel excavation preliminary bracing structure, includes bottom plate (1), its characterized in that: the upper surface of the bottom plate (1) is fixedly connected with a first supporting rod (2), the upper end of the first supporting rod (2) is provided with a telescopic cylinder (5), the upper end of the telescopic cylinder (5) is provided with a second supporting rod (6), the upper end of the second supporting rod (6) is provided with a lower connecting disc (21), the upper surface of the lower connecting disc (21) is provided with an upper connecting disc (20), the upper surface of the upper connecting disc (20) is fixedly connected with a top cover (7), the front surface of the top cover (7) is fixedly connected with a fixed block (18), one side of the fixed block (18) is fixedly connected with a rotating shaft (17), and the outer wall of the rotating shaft (17) is rotatably connected with a clamping key (19);
go up last fixed surface of connection pad (20) and be connected with floor (8), the one end fixedly connected with crossbeam (9) of floor (8), the terminal surface of crossbeam (9) and the inboard fixed connection of overhead guard (7) are in the same place, the last fixed surface of crossbeam (9) is connected with shock attenuation telescopic link (12), the upper end of shock attenuation telescopic link (12) is provided with solid fixed cylinder (11), the last fixed surface of solid fixed cylinder (11) is connected with beaded finish (10), the inside of overhead guard (7) is provided with cavity (13), the inner wall fixedly connected with pneumatic cylinder (16) of cavity (13), the one end of pneumatic cylinder (16) is provided with hydraulic stem (15), the upper end fixedly connected with locating pin (14) of hydraulic stem (15).
2. The loess tunnel excavation primary support structure of claim 1, wherein: one side of the first supporting rod (2) and the upper surface of the bottom plate (1) are respectively provided with a base plate (4), and one side of each base plate (4) is fixedly connected with a reinforcing rib (3).
3. The loess tunnel excavation preliminary bracing structure of claim 2, wherein: the surface of the backing plate (4) is provided with a fixing bolt, and the backing plate (4) is fixedly connected with the bottom plate (1) and the first supporting rod (2) through the fixing bolt.
4. The loess tunnel excavation primary support structure of claim 1, wherein: the surface of the telescopic cylinder (5) is provided with a positioning hole, and the second supporting rod (6) is connected with the telescopic cylinder (5) in a sliding mode.
5. The loess tunnel excavation primary support structure of claim 1, wherein: the outer surface of the top cover (7) is provided with a through hole, and the diameter of the positioning pin (14) is the same as that of the through hole.
6. The loess tunnel excavation primary support structure of claim 1, wherein: the upper connecting disc (20) is fixedly connected with the lower connecting disc (21) through a clamping key (19), and the cross section of the top cover (7) is in a semicircular ring shape.
7. The loess tunnel excavation primary support structure of claim 1, wherein: the ribbed plates (8) are distributed in axial symmetry relative to the top cover (7), and reinforcing rods are fixedly connected between the ribbed plates (8).
8. The loess tunnel excavation primary support structure of claim 1, wherein: the inner surfaces of the reinforcing ring (10) and the top cover (7) are fixedly connected together, and the cross section of the reinforcing ring (10) is in a semicircular ring shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023295016.XU CN214247367U (en) | 2020-12-31 | 2020-12-31 | Loess tunnel excavation preliminary bracing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023295016.XU CN214247367U (en) | 2020-12-31 | 2020-12-31 | Loess tunnel excavation preliminary bracing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214247367U true CN214247367U (en) | 2021-09-21 |
Family
ID=77722624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023295016.XU Active CN214247367U (en) | 2020-12-31 | 2020-12-31 | Loess tunnel excavation preliminary bracing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214247367U (en) |
-
2020
- 2020-12-31 CN CN202023295016.XU patent/CN214247367U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105002924A (en) | Hollow ground anchor cage base | |
| CN109026025B (en) | Pipe jacking supporting and jacking system for construction tunnel connection channel | |
| CN214245753U (en) | Whole bearing structure of circular big deep foundation ditch | |
| CN112780300A (en) | High-pressure-bearing tunnel supporting structure | |
| CN209838448U (en) | Supporting device for coal mine tunneling | |
| CN214247367U (en) | Loess tunnel excavation preliminary bracing structure | |
| CN211948384U (en) | Tension-free cast-in-place pile foundation | |
| CN107119677B (en) | A kind of tubular pole stake top friction-shearing-type energy-consumption attachment device and its construction method | |
| CN213653839U (en) | Anti-seismic device for civil engineering | |
| CN210396760U (en) | Assembled supporting system for diversion tunnel construction | |
| CN212454322U (en) | Foundation engineering reinforcing drill | |
| CN213952240U (en) | Deep foundation pit slope supporting structure | |
| CN114810110A (en) | Shield receiving construction system and construction method suitable for complex stratum | |
| CN220599814U (en) | Tunnel portal structure for shield construction | |
| CN215721232U (en) | Formula high pressure gas pipeline protective structure is contained to apron | |
| CN214033772U (en) | Anti-seismic building foundation | |
| CN210368586U (en) | Steel bearing seat | |
| CN214741370U (en) | Double-deck bow member of soft rock tunnel of highway struts construction equipment | |
| CN214783985U (en) | A excavation supporting for among municipal works foundation ditch | |
| CN219993712U (en) | Composite tunnel lining structure | |
| CN217629489U (en) | Broken column jacking heightening and shaping combined hoop supporting system | |
| CN217538699U (en) | Arc opening plugging device of major diameter shield tunnel lower part structure | |
| CN211037920U (en) | Supporting member for wall replacement construction | |
| CN210122915U (en) | Subway tunnel construction is with supporting protective structure | |
| CN212563299U (en) | Movable support bracket for coal mine excavation roadway |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100000 zhoujiajing, Guanzhuang, Chaoyang District, Beijing Patentee after: CCCC FIRST HIGHWAY ENGINEERING GROUP Co.,Ltd. Patentee after: CCCC Central South Engineering Bureau Co.,Ltd. Patentee after: Gansu gonghanglv Tongding Expressway Management Co.,Ltd. Address before: 100000 zhoujiajing, Guanzhuang, Chaoyang District, Beijing Patentee before: CCCC FIRST HIGHWAY ENGINEERING GROUP Co.,Ltd. Patentee before: BRIDGE & TUNNEL ENGINEERING CO., LTD. OF CCCC FIRST HIGHWAY ENGINEERING Co.,Ltd. Patentee before: Gansu gonghanglv Tongding Expressway Management Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |