CN111608697A - Little step construction composite support device of tunnel - Google Patents
Little step construction composite support device of tunnel Download PDFInfo
- Publication number
- CN111608697A CN111608697A CN202010380243.8A CN202010380243A CN111608697A CN 111608697 A CN111608697 A CN 111608697A CN 202010380243 A CN202010380243 A CN 202010380243A CN 111608697 A CN111608697 A CN 111608697A
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- China
- Prior art keywords
- steel arch
- pipe
- pipe shed
- steel
- step construction
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- 238000010276 construction Methods 0.000 title claims abstract description 28
- 239000002131 composite material Substances 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 68
- 239000010959 steel Substances 0.000 claims abstract description 68
- 239000011435 rock Substances 0.000 claims abstract description 34
- 238000003466 welding Methods 0.000 claims description 13
- 239000004567 concrete Substances 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 210000004262 dental pulp cavity Anatomy 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000003014 reinforcing effect Effects 0.000 description 9
- 230000007547 defect Effects 0.000 description 2
- 239000011378 shotcrete Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a tunnel micro-step construction composite supporting device which comprises a plurality of root canal shed pipes, a plurality of fixing frames and a plurality of steel arch frames, wherein the root canal shed pipes are uniformly arranged in a semi-ring shape and are inserted into mountain rocks; the fixing frames are semi-ring bodies and are arranged at intervals along the length direction of the pipe shed pipes and are sleeved on the pipe shed pipes; the steel arch frames are connected into semi-ring bodies in sections, are arranged at certain intervals along the length direction of the pipe shed pipe and are butted with the fixing frames at corresponding positions, and the steel arch frames and the fixing frames are fixedly connected to form a closed complete ring body on the same transverse plane perpendicular to the pipe shed pipe. The invention provides supporting force for the rock above the upper part, so that the rock is not pulled, and the rock is fixed, thereby supporting the rock above the upper step when the step method is used for construction, being safer when the lower step is used for construction, and achieving the effect of safe construction.
Description
Technical Field
The invention relates to the technical field of composite support construction, in particular to a composite support device for tunnel micro-step construction.
Background
In the pit exploration engineering, the composite support is a support method which adopts and is matched with any one or more of a sprayed concrete support and a single support mode such as an anchor bolt support, grouting, a reinforcing mesh, a steel arch frame, a pipe shed and the like, so as to improve the safety degree of tunneling construction.
Chinese patent CN202360108U discloses a simple, convenient, safe and reliable's composite supporting structure, including many stock that stretch into the rock, its characterized in that: the exposed parts of the anchor rods are respectively welded with a first layer of steel bar mesh and a plurality of second layers of steel bar arch ribs, the first layer of steel bar mesh is tightly attached to the surface of the rock, and the second layers of steel bar arch ribs are respectively welded on the outer side of the first layer of steel bar mesh; in addition, the second layer of steel bar arch ribs and the first layer of steel bar net are covered with sprayed concrete.
The anchor rod device in the technical scheme has the following defects: the stock inserts in the rock layer of top to the welding has multilayer reinforcing bar net in the bottom of stock, leads to the rock layer of top to experience too big pulling force, causes the occurence of failure easily.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a tunnel micro-step construction composite supporting device.
In order to achieve the purpose, the invention adopts the following technical scheme:
a tunnel micro-step construction composite supporting device comprises a plurality of root canal shed pipes, a plurality of fixing frames and a plurality of steel arches, wherein the root canal shed pipes are uniformly arranged in a semi-annular shape and are inserted into mountain rocks; the fixing frames are semi-ring bodies and are arranged at intervals along the length direction of the pipe shed pipes and are sleeved on the pipe shed pipes; the steel arch frames are connected into semi-ring bodies in sections, are arranged at certain intervals along the length direction of the pipe shed pipe and are butted with the fixing frames at corresponding positions, and the steel arch frames and the fixing frames are fixedly connected to form a closed complete ring body on the same transverse plane perpendicular to the pipe shed pipe.
Furthermore, on the same transverse plane perpendicular to the pipe of the pipe shed, two end heads of the fixing frame are fixedly connected with a section of steel arch frame respectively; two ends of each section of the steel arch are fixedly connected with connecting plates, connecting holes are formed in the outer edge portion of each connecting plate, the connecting plates of two adjacent sections of the steel arch are attached to each other, and the two adjacent sections of the steel arch are connected through connecting bolts penetrating through the connecting holes.
Furthermore, along pipe shed pipe length direction, equal rigid coupling has the reinforcing bar net between adjacent two sections around the steel bow member, and the concrete support layer has been laid on the reinforcing bar net.
Furthermore, a plurality of grouting rods are fixedly connected to the outer side wall of the steel arch frame, hollow grouting grooves are formed in the grouting rods, and the grouting rods are inserted into the rock body.
Further, the lateral wall of steel bow member has seted up the fixed orifices, is equipped with the screw thread in the fixed orifices, inserts and is equipped with the lock foot stock, and the circumference lateral wall of lock foot stock is provided with the thread groove, and the lock foot stock has the lock foot nut through threaded connection, and the rigid coupling has the dead lever between two adjacent lock foot stocks.
Furthermore, a plurality of anchor rods are fixedly connected to the outer side wall of the steel arch frame, and the anchor rods are inserted into the rock body.
Further, the outer side wall of the connecting plate is provided with a welding groove.
Further, the fixing mode is welding.
The invention has the beneficial effects that:
1. according to the semicircular evenly distributed through setting up a plurality of pipe canopy pipes, and fix through the mount to be provided with the steel bow member in the below, make the rock of steel bow member top not receive the pulling force, and have the fixed action to the rock, the steel bow member can provide the holding power to the top rock, thereby when using the step method construction, play the supporting role to the top rock of upper ledge, it is safer when carrying out the step construction down, reach the effect of safe construction.
2. Through setting up reinforcing bar net, stock and concrete support layer, can make the steel bow member fix in the rock better, and have stable effect to the rock, still have certain water-proof effects to reach safer and waterproof effect.
3. Through set up the connecting hole at the connecting plate outer wall and can make two sections steel bow member carry out fixed connection to through the further fixed of welding groove to two sections steel bow members, the lock foot stock can make and do not have the space between steel bow member and the rock mass, and the dead lever can prevent that the lock foot nut from droing, thereby reaches the effect of fixed with being connected the steel bow member better.
Drawings
FIG. 1 is a schematic front view of the apparatus of the present invention;
FIG. 2 is a schematic top view of the apparatus of the present invention;
FIG. 3 is an enlarged view of B in FIG. 2;
fig. 4 is an enlarged structural diagram of a in fig. 2.
In the figure: 1-a fixed mount; 2-pipe shed pipes; 3-grouting rod; 4-steel arch centering; 5-anchor rod; 6-connecting plates; 7-reinforcing mesh; 8-concrete supporting layer; 9-grouting groove; 10-locking the anchor rod; 11-thread groove; 12-lockpin nut; 13-a fixation rod; 14-connecting bolts; 15-connecting holes; 16-welding of the grooves.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1 to 4, a composite support device for tunnel micro-step construction comprises a plurality of pipe shed pipes 2, a plurality of fixing frames 1 and a plurality of steel arch frames 4, wherein the pipe shed pipes 2 are uniformly arranged in a semi-annular shape and are inserted into mountain rocks; the fixing frame 1 is a semi-ring body, is arranged at intervals along the length direction of the pipe shed pipe 2 and is sleeved on the pipe shed pipe 2; the steel arch frames 4 are connected into semi-ring bodies in sections, are arranged at certain intervals along the length direction of the pipe shed pipe 2 and are in butt joint with the fixing frames 1 at corresponding positions, and the steel arch frames 4 and the fixing frames 1 are welded to form a closed complete ring body on the same transverse plane perpendicular to the pipe shed pipe 2. Evenly lay according to the semicircle form through setting up a plurality of pipe canopy pipes 2, and fix through mount 1 to be provided with steel bow member 4 in the below, make the rock of top not receive the pulling force, and have the fixed action to the rock, steel bow member 4 can provide the holding power to the top rock, thereby when using the step method construction, play the supporting role to the top rock of upper ledge, safer when carrying out the step construction down, reach the effect of safe construction.
To further solve the security problem; as shown in fig. 1 and 4, on the same transverse plane perpendicular to the pipe shed pipe 2, two ends of the fixing frame 1 are respectively welded with a section of steel arch frame 4; connecting plates 6 are welded at two ends of each steel arch frame 4, a connecting hole 15 is formed in the outer edge of each connecting plate 6, the connecting plates 6 of the adjacent sections of the steel arch frames 4 are attached to each other, and the connecting bolts 14 penetrate through the connecting holes 15 to connect the adjacent sections of the steel arch frames 4; the outer side wall of the connecting plate 6 is provided with a welding groove 16; the two steel arches 4 can be fixedly connected by arranging the connecting holes 15 on the outer wall of the connecting plate 6, and the two steel arches 4 can be further fixed by the welding grooves 16.
A reinforcing mesh 7 is fixedly connected between the front and the rear adjacent sections of the steel arch frames 4 along the length direction of the pipe shed pipe 2; a concrete supporting layer 8 is laid on the reinforcing mesh 7; the outer side wall of the steel arch frame 4 is welded with a plurality of grouting rods 3, the grouting rods 3 are provided with hollow grouting grooves 9, and the grouting rods 3 are inserted into rock bodies; the outer side wall of the steel arch frame 4 is provided with a fixing hole, threads are arranged in the fixing hole, a foot locking anchor rod 10 is inserted in the fixing hole, the circumferential outer wall of the foot locking anchor rod 10 is provided with a thread groove 11, the foot locking anchor rod 10 is connected with a foot locking nut 12 through threads, and a fixing rod 13 is welded between every two adjacent foot locking anchor rods 10; the welding of the lateral wall of steel bow member 4 has a plurality of stock 5, and in stock 5 inserted and located the rock mass, lock foot stock 10 can make and do not have the space between steel bow member 4 and the rock mass, and dead lever 13 can prevent that lock foot nut 12 from droing to reach the effect of fixing and being connected better to steel bow member 4.
The working principle of the invention is as follows: when in use, the rock above the upper step is drilled, the pipe shed pipe 2 is inserted into the rock hole, fixing the fixing frame 1 and the pipe shed pipe 2, welding the fixing frame 1 and the steel arch frame 4, fixing the steel arch frame 4 on the outer wall of the rock through an anchor rod 5, the steel arch frames 4 are connected through the connecting plates 6, welded through the welding grooves 16 and then connected in the length direction of the pipe shed pipe 2, the reinforcing mesh 7 is welded between the corresponding front and back adjacent steel arch frames 4, and through the mode of spraying concrete, the reinforcing mesh 7 and the steel arch frame 4 are filled to form a concrete support layer 8, grouting operation is carried out into the grouting rod 3 through the grouting groove 9, and by rotating the foot locking nut 12, therefore, no gap is left between the steel arch frame 4 and the rock, the fixed rod 13 is welded on the circumferential outer wall of the foot locking anchor rod 10 for fixing, and after the fixing is finished, the construction work of the lower step can be carried out.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The utility model provides a little step construction composite support device of tunnel which characterized in that: the pipe shed comprises a plurality of pipe shed pipes, a plurality of fixing frames and a plurality of steel arches, wherein the pipe shed pipes are uniformly arranged in a semi-annular shape and are inserted into mountain rocks; the fixing frames are semi-ring bodies and are arranged at intervals along the length direction of the pipe shed pipes and are sleeved on the pipe shed pipes; the steel arch frames are connected into semi-ring bodies in sections, are arranged at certain intervals along the length direction of the pipe shed pipe and are butted with the fixing frames at corresponding positions, and the steel arch frames and the fixing frames are fixedly connected to form a closed complete ring body on the same transverse plane perpendicular to the pipe shed pipe.
2. The tunnel micro-step construction composite supporting device of claim 1, which is characterized in that: on the same transverse plane perpendicular to the pipe shed pipes, two end heads of the fixing frame are fixedly connected with a section of steel arch frame respectively; two ends of each section of the steel arch are fixedly connected with connecting plates, connecting holes are formed in the outer edge portion of each connecting plate, the connecting plates of two adjacent sections of the steel arch are attached to each other, and the two adjacent sections of the steel arch are connected through connecting bolts penetrating through the connecting holes.
3. The tunnel micro-step construction composite supporting device of claim 1 or 2, which is characterized in that: the steel arch frame is characterized in that a steel bar net is fixedly connected between the front section and the rear section of the steel arch frame in the length direction of the pipe shed, and a concrete supporting layer is laid on the steel bar net.
4. The tunnel micro-step construction composite supporting device of claim 1, which is characterized in that: the outer side wall of the steel arch is fixedly connected with a plurality of grouting rods, hollow grouting grooves are formed in the grouting rods, and the grouting rods are inserted into rock bodies.
5. The tunnel micro-step construction composite supporting device of claim 1, which is characterized in that: the fixed orifices have been seted up to the lateral wall of steel bow member, are equipped with the screw thread in the fixed orifices, insert and are equipped with the lock foot stock, and the circumference lateral wall of lock foot stock is provided with the thread groove, and the lock foot stock has lock foot nut through threaded connection, and the rigid coupling has the dead lever between two adjacent lock foot stocks.
6. The tunnel micro-step construction composite supporting device of claim 1, which is characterized in that: the outer side wall of the steel arch is fixedly connected with a plurality of anchor rods, and the anchor rods are inserted into the rock body.
7. The tunnel micro-step construction composite supporting device of claim 2, which is characterized in that: the outer side wall of the connecting plate is provided with a welding groove.
8. The tunnel micro-step construction composite supporting device according to any one of claims 1 or 2, or 4 to 6, characterized in that: the fixed connection is welding.
9. The tunnel micro-step construction composite support device of claim 3, which is characterized in that: the fixed connection is welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010380243.8A CN111608697A (en) | 2020-05-08 | 2020-05-08 | Little step construction composite support device of tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010380243.8A CN111608697A (en) | 2020-05-08 | 2020-05-08 | Little step construction composite support device of tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111608697A true CN111608697A (en) | 2020-09-01 |
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ID=72198168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010380243.8A Pending CN111608697A (en) | 2020-05-08 | 2020-05-08 | Little step construction composite support device of tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111608697A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324472A (en) * | 2020-11-21 | 2021-02-05 | 中铁一局集团有限公司 | Tunnel steel frame supporting structure and construction method |
| CN114382509A (en) * | 2021-12-08 | 2022-04-22 | 中国华冶科工集团有限公司 | Section tunnel collapse construction method and support device |
-
2020
- 2020-05-08 CN CN202010380243.8A patent/CN111608697A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324472A (en) * | 2020-11-21 | 2021-02-05 | 中铁一局集团有限公司 | Tunnel steel frame supporting structure and construction method |
| CN112324472B (en) * | 2020-11-21 | 2022-04-08 | 中铁一局集团有限公司 | Tunnel steel frame supporting structure and construction method |
| CN114382509A (en) * | 2021-12-08 | 2022-04-22 | 中国华冶科工集团有限公司 | Section tunnel collapse construction method and support device |
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