CN217270216U - Reinforced structure of tunnel intersection wall body - Google Patents
Reinforced structure of tunnel intersection wall body Download PDFInfo
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- CN217270216U CN217270216U CN202221255464.3U CN202221255464U CN217270216U CN 217270216 U CN217270216 U CN 217270216U CN 202221255464 U CN202221255464 U CN 202221255464U CN 217270216 U CN217270216 U CN 217270216U
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Abstract
The utility model relates to a coal mine tunnel structure, which is a reinforced structure of a tunnel intersection wall body; the supporting device comprises a main supporting beam and auxiliary supporting beams, wherein the main supporting beam is fixedly arranged along a wall body at a roadway intersection point, the auxiliary supporting beams are fixedly arranged on two sides of the main supporting beam along the wall body at an intersection, and the main supporting beam and the auxiliary supporting beams are connected through chains; the main supporting beam, the auxiliary supporting beam and the chain are all sealed in the wall body; the utility model has the advantages that the structure plays a role in reinforcing surrounding rocks of the wall body at the intersection of the roadway; the supporting function of the supporting beam is fully exerted, and the integral supporting capability and reinforcing capability are stronger; the problem of the lower poor effect of strutting of intensity when the tunnel fork is encrypted to be strutted in the pit is solved.
Description
Technical Field
The utility model relates to a coal mine tunnel structure specifically is a reinforced structure of tunnel intersection wall body.
Background
When a mine is developed underground, in order to facilitate ventilation and transportation, the roadways need to be communicated, a crossing point is formed when the roadways are communicated, and the crossing point has a larger span than the section of a common roadway, so that the problem of reinforcing and supporting the wall body (commonly called as a 'ox nose') of the crossing point of the roadway is always difficult to support at the crossing point.
When the existing roadway intersection wall is designed and constructed, the intersection points with longer service life are usually reinforced in a large column pier mode, and the intersection points with shorter service life are usually reinforced in an anchor net cable encryption supporting mode. The large pier mode is that a concrete pier with the width of 0.5m and the length of 2m of a roadway extending into two sides is arranged, the mode has higher supporting strength, but the pier section wall needs to be excavated first and then concrete is poured, the amount of gangue and labor cost are increased by excavation, the concrete consumption is increased by pouring, and the construction progress can be influenced by concrete solidification. The anchor net cable encryption support mode is an encryption support mode which adopts support materials such as anchor rods, metal nets and anchor cables, the mode is relatively simple and rapid in support, however, the surrounding rock of the turnout wall is relatively small in size and affected by excavation disturbance, the strength of the surrounding rock is relatively low, the possibility of surrounding rock breakage is increased when the anchor rods and the anchor cables are drilled, the support effect is poor, and the anchor net cable encryption support mode is not suitable for being used in intersection points which are long in service life, large in turnout span, poor in stability of roadway surrounding rock and large in roadway mine pressure.
The prior patent cn201821108777.x discloses a supporting structure for a roadway intersection point ox nose, which comprises a plurality of anchor rods, wherein the plurality of anchor rods are perpendicular to a roadway wall and are arranged at intervals; the metal net is arranged on the outer side of the roadway wall through the anchor rods, or the anchor rods are suitable for being connected with the roadway wall through the metal net; the reinforced structure is arranged on the outer side of the metal net and fixed with the relative position of the metal net. This patent is an improvement of conventional anchor net cable encryption support mode, and when great, the tunnel country rock stability is relatively poor, the tunnel mine pressure is great to tunnel fork span, encryption stock and anchor rope can increase the degree of fragmentation of wall body country rock, reduce the compressive strength of wall body, hardly guarantee intersection point stability and construction safety.
Current patent CN201921120943.2 discloses support structure of tunnel intersection point ox nose, including anchor rope, steel band and oilless wire rope, set up three rows of anchor rope in the ox nose, every three anchor rope of row: longitudinally arranging steel belts along the outside of the anchor cable holes, arranging anchor cable trays outside the steel belts to compress the steel belts, enabling the anchor cables to penetrate through the steel belts and the anchor cable trays, installing anchors at the end parts of the anchor cables to compress the anchor cable trays, and realizing the longitudinal connection of the anchor cables through the steel belts; and the oilless steel wire rope is transversely arranged outside the anchor cable holes in the same row to connect the anchor cables, penetrates through the anchor cable tray and is used for realizing transverse connection of the anchor cables. The patent is also an improvement of the conventional anchor net cable encryption supporting mode, and still cannot be applied to the intersection points with large roadway fork span, poor stability of roadway surrounding rocks and large roadway mine pressure.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art's is not enough, provides a reinforced structure of tunnel intersection wall body, has solved the lower relatively poor problem of effect of strutting of intensity when taking time and wasting material and labouring the problem and encrypting to strut when present underworkings intersection establishes the column pier.
In order to achieve the above purpose, the present invention is achieved by the following technical solutions.
A reinforced structure of a roadway intersection wall body comprises a main supporting beam and auxiliary supporting beams, wherein the main supporting beam is fixedly arranged along the wall body at the intersection point of the roadway, the auxiliary supporting beams are fixedly arranged on two sides of the main supporting beam along the wall body at the intersection, and the main supporting beam and the auxiliary supporting beams are connected through chains; the main supporting beam, the auxiliary supporting beam and the chain are all sealed in the wall body.
Furthermore, the upper end and the lower end of the main supporting beam and the auxiliary supporting beam are fixedly connected with base plates, and the base plates support the solid bottom and the solid top of the intersection roadway.
Furthermore, the main supporting beam, the auxiliary supporting beam and the intersection wall body are fixed through bolts.
Furthermore, the main supporting beam and the auxiliary supporting beam are provided with two first round holes, the first round holes are located on the middle line of the trisection positions of the supporting beams, and the first round holes are used for penetrating and connecting bolts.
Furthermore, the main supporting beam, the auxiliary supporting beam, the base plate, the chain and the bolt are sealed in the wall body through concrete.
Furthermore, a metal net is arranged in the wall body provided with the reinforced structure.
Furthermore, the thickness of the concrete is more than or equal to 100 mm.
Furthermore, the distance between the auxiliary supporting beam and the main supporting beam is 1.5-2.5 m.
Furthermore, second round holes are formed in the upper end and the lower end of each of the main supporting beam and the auxiliary supporting beam and used for penetrating and connecting the chains; the second round hole is located a supporting beam both wings, apart from both ends backing plate for 300mm ~600 mm.
Furthermore, the wall body at the position where the main supporting beam is arranged is in a straight wall form or an arc wall form; the width or arc length of the wall body is more than or equal to 500 mm.
The utility model discloses produced beneficial effect for prior art does:
the utility model discloses set up a main tributary supporting beam and two and assist supporting beam in the wall body position of tunnel intersection, the main tributary supporting beam sets up in the middle of the wall body of tunnel intersection, assist the supporting beam to set up in the both sides of the wall body of intersection, the triangle region that three supporting beams formed can support the roof and the bottom plate of the large-span of intersection effectively, can also consolidate the wall body country rock of tunnel intersection; simultaneously, the two ends of the supporting beams are respectively welded with a base plate, the contact area of the top plate and the bottom plate can be increased by the steel base plates, and the steel base plates at the two ends support the solid bottom and the solid top of the intersection roadway during installation so as to fully play the supporting role of the supporting beams and enable the supporting capacity and the reinforcing capacity of the three supporting beams to be stronger.
Because single supporting beam of engineering scene has the possibility that takes place the unstability and empty, the utility model discloses set up the chain between main tributary supporting beam and the supplementary supporting beam and be connected, the chain links together three supporting beams, can prevent to cause the accident because of a certain supporting beam unstability.
After the wall body of the roadway intersection is excavated, a layer of metal net is laid firstly, and the metal net can prevent the roadway rib stripping accident during construction; the main supporting beam, the auxiliary supporting beam, the chain and the bolt are installed, so that the whole structural member and the fork wall body can be fixed together, and the pressure resistance of wall body surrounding rock is improved; finally, the concrete is sprayed to seal the metal member, and the sealing can play a role in rust prevention of metal members such as the supporting beam and the like.
The utility model discloses can synthesize the specification model of selecting main tributary supporting beam and assisting a supporting beam according to factors such as fork point service life, fork point section span size, tunnel country rock stability, tunnel ore pressure value during site operation, can use in the fork point that service life is longer, the fork span is great, tunnel country rock stability is relatively poor, tunnel ore pressure is great completely, the suitability is wider, also do not have construction stock and anchor rope among the prior art simultaneously and lead to increasing the broken phenomenon of country rock.
Drawings
Fig. 1 is a plan layout view of a reinforcing structure of a roadway intersection wall body of the utility model;
FIG. 2 is an enlarged view of a reinforcing structure;
FIG. 3 is an expanded view of the support beam;
in the figure: 1-main support beam; 2-auxiliary supporting beam; 3-a steel backing plate; 4, a chain; 5, a bolt; 6-metal mesh; 7-concrete; 8-a first circular aperture; 9-a second circular hole; 10-main roadway; 11-branch lane; 12-intersection point.
Detailed Description
In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.
As shown in fig. 1, 2, and 3, this embodiment provides a reinforcing structure for a roadway intersection wall, including a main supporting beam 1, two auxiliary supporting beams 2, six steel base plates 3, chains 4, and bolts 5, where the main supporting beam 1 is disposed in the middle of the roadway intersection wall, the auxiliary supporting beams 2 are disposed at two sides of the intersection wall, one side is in the main roadway, and the other side is in the branch roadway, and the distance between the positions where the auxiliary supporting beams 2 are disposed and the main supporting beams is 1.5m to 2.5m during field construction; the two ends of the main supporting beam 1 and the auxiliary supporting beam 2 are respectively welded with a steel base plate 3, the thickness of the steel base plate 3 is not less than 8mm, the size of the steel base plate is not less than 300mm multiplied by 300mm, the welding adopts a full welding mode during processing, the height of a welding seam is not 3mm less than the thickness of the steel base plate 3, and the steel base plates 3 at the two ends are supported to the solid bottom and the solid top of a fork roadway during installation so as to fully play the supporting role of the supporting beams; the main supporting beam 1 and the auxiliary supporting beam 2 are connected through the chain 4, and the chain 4 connects the three supporting beams together, so that accidents caused by instability of one supporting beam can be prevented; the main supporting beam 1, the auxiliary supporting beam 2 and the turnout wall are fixed through the bolts 5, the type of the bolt 5 is determined according to the stability of the turnout wall surrounding rock, and when the wall surrounding rock is broken seriously in site construction, grouting is firstly performed to reinforce the surrounding rock, so that the reinforcing stability between the supporting beam and the turnout wall is ensured.
Furthermore, during site construction, after the wall body of the roadway intersection is excavated, a layer of metal mesh 6 is laid, wherein the metal mesh 6 can be a phi 6mm steel bar mesh, and the space between meshes is 100 multiplied by 100 mm; then, the main supporting beam 1, the auxiliary supporting beam 2, the chain 4 and the bolt 5 are installed according to requirements, and the whole structural member and the fork wall are fixed together to increase the pressure resistance of the wall surrounding rock; and finally, spraying concrete 7 to seal the main support beam, the auxiliary support beam 2, the chain 4 and the metal net 6, wherein the concrete is prevented from being rusted, the strength grade of the concrete is not lower than C20 during construction, and the main support beam 1, the auxiliary support beam 2, the chain 4 and the metal net 6 are completely sealed by the spraying thickness of the concrete and are not less than 100 mm.
Furthermore, the specification and model of the main supporting beam 1 and the auxiliary supporting beam 2 are comprehensively selected according to factors such as service life of a cross point, cross point section span size, roadway surrounding rock stability and roadway mine pressure value during site construction so as to increase the application range of the structure, the strength of the main supporting beam 1 is not lower than that of the auxiliary supporting beam 2 during model selection, and the length of the supporting beams is determined according to the real bottom and real top distance separation and reunion principle of the cross point roadway.
All set up 2 first round holes 8 on main tributary supporting beam 1, the auxiliary stay beam 2 during add-on, first round hole 8 is located a supporting beam trisection position central line, and first round hole 8 is used for the bolt to run through, and the aperture is greater than bolt body of rod diameter 3mm ~6 mm.
Set up 4 second round holes 9 on the main tributary supporting beam 1 during processing, set up 2 second round holes 9 on the auxiliary supporting beam 2, second round hole 9 is located a supporting beam both wings, is 300mm ~600mm apart from both ends steel backing plate 3, and second round hole 9 is used for chain 4 to run through, and the aperture is greater than chain diameter 3mm ~6 mm.
The wall body at the arrangement position of the main supporting beam 1 can adopt a straight wall form vertical to the main roadway or an arc wall form, and the width or the arc length of the wall body is not less than 500 mm.
The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.
Claims (10)
1. The reinforcing structure of the wall body of the roadway intersection is characterized by comprising a main supporting beam (1) and auxiliary supporting beams (2), wherein the main supporting beam (1) is fixedly arranged along the wall body at the intersection point of the roadway, the auxiliary supporting beams (2) are fixedly arranged on two sides of the main supporting beam (1) along the wall body of the intersection, and the main supporting beam (1) and the auxiliary supporting beams (2) are connected through a chain (4); the main supporting beam (1), the auxiliary supporting beam (2) and the chain (4) are all sealed in the wall.
2. The reinforcing structure of the roadway intersection wall body as claimed in claim 1, wherein the upper and lower ends of the main supporting beam (1) and the auxiliary supporting beam (2) are fixedly connected with backing plates, and the backing plates are supported to the solid bottom and the solid top of the intersection roadway.
3. The reinforcing structure of the roadway intersection wall body as claimed in claim 2, wherein the main supporting beam (1), the auxiliary supporting beam (2) and the intersection wall body are fixed through bolts (5).
4. The reinforcing structure of the roadway intersection wall body as claimed in claim 3, wherein the main supporting beam (1) and the auxiliary supporting beam (2) are provided with two first round holes (8), the first round holes (8) are located on the central line of the trisection positions of the supporting beams, and the first round holes (8) are used for penetrating and connecting the bolts (5).
5. The reinforcing structure of a roadway intersection wall body according to claim 3, wherein the main supporting beams (1), the auxiliary supporting beams (2), the backing plates, the chains (4) and the bolts (5) are enclosed in the wall body through concrete (7).
6. The reinforcing structure of a roadway intersection wall body as claimed in claim 5, wherein a metal net (6) is arranged in the wall body of the reinforcing structure.
7. The reinforcing structure of a roadway intersection wall body according to claim 5, wherein the thickness of the concrete (7) is more than or equal to 100 mm.
8. The reinforcing structure of a roadway intersection wall body according to claim 1, wherein the distance between the auxiliary supporting beam (2) and the main supporting beam (1) is 1.5-2.5 m.
9. The reinforcing structure of the roadway intersection wall body according to claim 1, wherein the upper end and the lower end of the main supporting beam (1) and the auxiliary supporting beam (2) are provided with second round holes (9), and the second round holes (9) are used for penetrating and connecting the chains (4); the second round holes (9) are located on two wings of the supporting beam and are 300-600 mm away from the base plates at the two ends.
10. The reinforcing structure of the roadway intersection wall body as claimed in claim 1, wherein the wall body at the position where the main supporting beam (1) is arranged is in a straight wall form or a circular arc wall form; the width or arc length of the wall body is more than or equal to 500 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221255464.3U CN217270216U (en) | 2022-05-24 | 2022-05-24 | Reinforced structure of tunnel intersection wall body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221255464.3U CN217270216U (en) | 2022-05-24 | 2022-05-24 | Reinforced structure of tunnel intersection wall body |
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| CN217270216U true CN217270216U (en) | 2022-08-23 |
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| CN202221255464.3U Active CN217270216U (en) | 2022-05-24 | 2022-05-24 | Reinforced structure of tunnel intersection wall body |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116357353A (en) * | 2023-05-30 | 2023-06-30 | 中国矿业大学(北京) | High-strength control system for crossing roadway and construction method |
| CN117145523A (en) * | 2023-10-31 | 2023-12-01 | 煤炭工业太原设计研究院集团有限公司 | Sylvite inclined shaft mudstone section roof-falling treatment reinforcing structure and method |
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2022
- 2022-05-24 CN CN202221255464.3U patent/CN217270216U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116357353A (en) * | 2023-05-30 | 2023-06-30 | 中国矿业大学(北京) | High-strength control system for crossing roadway and construction method |
| CN116357353B (en) * | 2023-05-30 | 2023-07-28 | 中国矿业大学(北京) | High-strength control system for crossing roadway and construction method |
| CN117145523A (en) * | 2023-10-31 | 2023-12-01 | 煤炭工业太原设计研究院集团有限公司 | Sylvite inclined shaft mudstone section roof-falling treatment reinforcing structure and method |
| CN117145523B (en) * | 2023-10-31 | 2023-12-26 | 煤炭工业太原设计研究院集团有限公司 | Sylvite inclined shaft mudstone section roof-falling treatment reinforcing structure and method |
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