CN103742178A - Deep underground roadway support mechanism - Google Patents
Deep underground roadway support mechanism Download PDFInfo
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- CN103742178A CN103742178A CN201410005709.0A CN201410005709A CN103742178A CN 103742178 A CN103742178 A CN 103742178A CN 201410005709 A CN201410005709 A CN 201410005709A CN 103742178 A CN103742178 A CN 103742178A
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Abstract
The invention discloses a deep underground roadway support mechanism. The deep underground roadway support mechanism comprises a roadway, a roadway support and a surrounding rock consolidation layer, wherein a crushable backfilling layer is arranged on the edge of the surrounding rock consolidation layer, which is far away from a rock stratum, the other side of the crushable backfilling layer is fixed together with the roadway support, the inner area of the roadway support forms the roadway, a plurality of anchor rods are evenly arranged on two outer sides of the crushable backfilling layer and along the vertical direction, the other end of each anchor rod passes through the surrounding rock consolidation layer and is fixed onto the rock stratum, an anchor lock is arranged at the top of the crushable backfilling layer, the anchor lock passes through the surrounding rock consolidation layer and is fixed onto the rock stratum, a steel support is arranged on the inner side of the roadway support, and a vibration isolation device is arranged in an interval between the steel support and the roadway support. According to the deep underground roadway support mechanism, dynamic pressure loads are evenly distributed through the crushable backfilling layer, the dynamic pressure loads are reduced, pressure transmitted from the dynamic pressure loads to the roadway support is reduced, residual pressure is absorbed through the vibration isolation device, and accordingly compression resistance bearing capacity of the roadway structure is improved.
Description
Technical field
The present invention relates to a kind of beneath roadway engineering, particularly a kind of support of underground tunnel mechanism deeply.
Background technology
In underworkings engineering construction, the supporting capacity that people take to improve structure self conventionally improves the supporting capacity of the dark underground dynamic pressure load of tunnel opposing.The propagation of the compressional wave surge pressure producing due to underground dynamic pressure load is closely related with the rigidity of rock stratum medium, during the equal stiffness of rock stratum medium, compressional wave is propagated with uniform form, surge pressure in wave surface is to wait by force, compressional wave in the air, while running into the rock stratum medium of unequal rigidity, surge pressure in wave surface will produce inhomogeneous variation, the intensity of surge pressure is no longer identical, the pressure that the rock stratum medium that rigidity is large bears is large, the pressure that the stratum media that rigidity is little bears is little, and when the close rock stratum rigidity of structure is larger, rock stratum is delivered to structure, and originally pressure is with it larger, therefore simple by improving the well supporting capacity of the supporting mechanism in tunnel of structure self-bearing capacity.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of support of underground tunnel mechanism deeply, and this supporting mechanism can increase substantially the dynamic pressure supporting capacity of tunnel structure.
For achieving the above object, the invention provides following technical scheme: a kind of support of underground tunnel mechanism deeply, comprise tunnel, excavation support and surrounding rock consolidation layer, surrounding rock consolidation layer arranges soft backfill layer away from the edge of rock stratum, another side and the excavation support of soft backfill layer are fixed, the interior zone of excavation support forms tunnel, two outsides of soft backfill layer vertically evenly arrange multiple anchor poles, the other end of anchor pole is fixed through surrounding rock consolidation layer and rock stratum, the top of soft backfill layer arranges anchor lock, anchor lock is fixed through surrounding rock consolidation layer and rock stratum, the inner side of excavation support arranges steel bracket, in gap between steel bracket and excavation support, isolation mounting is set.
Preferably, the length of anchor pole be greater than surrounding rock consolidation layer span 1/2, and the spacing between the anchor pole in homonymy is less than 1/2 of rock-bolt length.
Preferably, isolation mounting is steel spring vibration isolator or steel-wire isolator or damping isolator.
Preferably, filled rubber or graininess rock in soft backfill layer.
Preferably, the thickness of surrounding rock consolidation layer is 100～150mm, and the thickness of soft backfill layer is 0.1～0.2 with the span of excavation support ratio.
Preferably, in surrounding rock consolidation layer, fill high tensile flexible material or spray concrete.
Adopt technique scheme, soft backfill layer is evenly distributed dynamic pressure load, and reduces dynamic pressure load, and the pressure that dynamic pressure load is delivered to excavation support diminishes, and absorbs remaining pressure by isolation mounting, thereby improves the resistance to compression supporting capacity of tunnel structure.
The length of anchor pole be greater than surrounding rock consolidation layer span 1/2, and the spacing between the anchor pole in homonymy is less than 1/2 of rock-bolt length, makes anchor pole frangibility not within the scope of pressure-bearing, and is convenient to dynamic pressure load and is evenly delivered in soft backfill layer; Isolation mounting is steel spring vibration isolator or steel-wire isolator or damping isolator, utilizes existing vibration absorber, reduces cost of manufacture; In surrounding rock consolidation layer, fill high tensile flexible material or spray concrete, the thickness of surrounding rock consolidation layer is 100～150mm, tunnel rigidity is around diminished, reduce dynamic pressure load, filled rubber or graininess rock in soft backfill layer, the thickness of soft backfill layer is 0.1～0.2 with the span of excavation support ratio, can make dynamic pressure load be more evenly distributed.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Wherein, 1. tunnel 2. excavation support 3. surrounding rock consolidation layer 4. anchor pole 5. anchor are locked the soft backfill layer of 6. steel bracket 7. isolation mounting 8..
The specific embodiment
Below in conjunction with accompanying drawing, by the description to embodiment, the present invention will be further described:
As shown in Figure 1, the dark support of underground tunnel of the present invention mechanism, comprise tunnel 1, excavation support 2 and surrounding rock consolidation layer 3, surrounding rock consolidation layer 3 arranges soft backfill layer 8 away from the edge of rock stratum, another surface of soft backfill layer 8 is fixing with excavation support 2, the interior filled rubber of soft backfill layer 8 or graininess rock, the interior zone of excavation support 2 forms tunnel 1, two outsides of soft backfill layer 3 vertically evenly arrange multiple anchor poles 4, the other end of anchor pole 4 is fixed through surrounding rock consolidation layer 3 and rock stratum, the length of anchor pole 5 be greater than surrounding rock consolidation layer 3 span 1/2, and the spacing between the anchor pole in homonymy 5 is less than 1/2 of anchor pole (5) length, the top of soft backfill layer 8 arranges anchor lock 5, anchor lock 5 is fixed through surrounding rock consolidation layer 3 and rock stratum, the thickness of surrounding rock consolidation layer 3 is 100～150mm, surrounding rock consolidation layer 3 interior filling high tensile flexible material or injection concrete, the thickness of soft backfill layer 8 is 0.1～0.2 with the span ratio of excavation support 2, the inner side of excavation support 2 arranges steel bracket 6, in gap between steel bracket 6 and excavation support 2, isolation mounting 7 is set, isolation mounting 7 is steel spring vibration isolator or steel-wire isolator or damping isolator.
The present invention adopts the supporting structure system of this composite construction form, for stress transmission has caused good condition, can effectively the compressional wave surge pressure major part acting in anti-structural system be married again in system rock stratum medium around, reach the object that increases substantially underworkings engineering supporting capacity.Its operating principle is, first dynamic pressure load is delivered to surrounding rock consolidation layer 3, surrounding rock consolidation layer 3 is delivered to soft backfill layer 8 again, due to surrounding rock consolidation layer 3 interior filling high tensile flexible material or injection concrete, rigidity is less than the rigidity of rock around, thereby the dynamic pressure load pressure being subject to reduces, and in soft backfill layer 8, be filled rubber or graininess rock, thereby the dynamic pressure load passing over from surrounding rock consolidation layer 3 is evenly dispersed, soft backfill layer 3 is evenly delivered to the dynamic pressure load being subject on excavation support 2 again, isolation mounting between excavation support 2 and steel bracket 6 absorbs dynamic pressure load.
The length of anchor pole 4 be greater than surrounding rock consolidation layer span 1/2, and the spacing between the anchor pole in homonymy 4 is less than 1/2 of rock-bolt length, makes anchor pole 4 frangibility not within the scope of pressure-bearing, and is convenient to dynamic pressure load and is evenly delivered in soft backfill layer; Isolation mounting 7 is steel spring vibration isolator or steel-wire isolator or damping isolator, utilizes existing vibration absorber, reduces cost of manufacture; Surrounding rock consolidation layer 3 interior filling high tensile flexible material or injection concrete, the thickness of surrounding rock consolidation layer 3 is 100～150mm, tunnel 1 rigidity is around diminished, reduce dynamic pressure load, the interior filled rubber of soft backfill layer 8 or graininess rock, the thickness of soft backfill layer 8 is 0.1～0.2 with the span of excavation support ratio, can make dynamic pressure load be evenly distributed.
It may be noted that described surrounding rock consolidation layer 3, backfill layer 8, excavation support 2 and steel bracket 6, in the situation that being subject to dynamic pressure load, all have strain capacity, and the volumetric strain of soft backfill layer 8 are not less than 30%.
Anchor pole 4 of the present invention adopts 45 structural iron, or is better than the Steel material making of 45 structural iron, and the surrender degree of depth of country rock should be less than the use length of anchor pole 4, and the use length of anchor pole 4 refers to removes anchor pole 4 standing parts anchor pole 4 length in addition.
Above-described is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make some distortion and improvement, and these all belong to protection scope of the present invention.
Claims (6)
1. a Zhong Shen support of underground tunnel mechanism, comprise tunnel (1), excavation support (2) and surrounding rock consolidation layer (3), it is characterized in that: described surrounding rock consolidation layer (3) arranges soft backfill layer (8) away from the edge of rock stratum, the another side of soft backfill layer (8) and excavation support (2) are fixing, the interior zone of excavation support (2) forms tunnel (1), two outsides of soft backfill layer (8) vertically evenly arrange multiple anchor poles (4), the other end of anchor pole (4) is fixed through surrounding rock consolidation layer (3) and rock stratum, the top of soft backfill layer (8) arranges anchor lock (5), anchor lock (5) is fixed through surrounding rock consolidation layer (3) and rock stratum, the inner side of described excavation support (2) arranges steel bracket (6), in gap between described steel bracket (6) and excavation support (2), isolation mounting (7) is set.
2. dark support of underground tunnel according to claim 1 mechanism, is characterized in that: the length of described anchor pole (5) be greater than surrounding rock consolidation layer (3) span 1/2, and the spacing between the anchor pole in homonymy (5) is less than 1/2 of anchor pole (5) length.
3. dark support of underground tunnel according to claim 1 mechanism, is characterized in that: described isolation mounting (7) is steel spring vibration isolator or steel-wire isolator or damping isolator.
4. dark support of underground tunnel according to claim 1 mechanism, is characterized in that: the interior filled rubber of described soft backfill layer (8) or graininess rock.
5. dark support of underground tunnel according to claim 1 mechanism, is characterized in that: the thickness of described surrounding rock consolidation layer (3) is 100～150mm, and the span ratio of the thickness of soft backfill layer (8) and excavation support (2) is 0.1～0.2.
6. dark support of underground tunnel according to claim 5 mechanism, is characterized in that: in described surrounding rock consolidation layer (3), fill high tensile flexible material or spray concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410005709.0A CN103742178A (en) | 2014-01-06 | 2014-01-06 | Deep underground roadway support mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410005709.0A CN103742178A (en) | 2014-01-06 | 2014-01-06 | Deep underground roadway support mechanism |
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| CN103742178A true CN103742178A (en) | 2014-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410005709.0A Pending CN103742178A (en) | 2014-01-06 | 2014-01-06 | Deep underground roadway support mechanism |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047612A (en) * | 2014-06-25 | 2014-09-17 | 安徽理工大学 | Stretchable combined support structure for deep roadway |
| CN104612705A (en) * | 2014-12-11 | 2015-05-13 | 中国矿业大学 | Roadway support method for preventing rock burst |
| CN110469342A (en) * | 2019-09-11 | 2019-11-19 | 华北科技学院 | A kind of gob side entry based on flexible in conjunction with rigid phase is asymmetric to cooperate with suspension device |
| CN111140266A (en) * | 2020-03-05 | 2020-05-12 | 西南交通大学 | Tunnel supporting structure suitable for large deformation of soft rock and construction method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0598891A (en) * | 1991-10-14 | 1993-04-20 | Hitachi Ltd | Tunnel provided with compression wave suppressing device |
| CN103046934A (en) * | 2012-12-14 | 2013-04-17 | 太原理工大学 | Method retaining and protecting soft surrounding rock roadways by placing hole pressure relief materials |
| CN203655325U (en) * | 2014-01-06 | 2014-06-18 | 安徽理工大学 | Deep underground roadway support mechanism |
-
2014
- 2014-01-06 CN CN201410005709.0A patent/CN103742178A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0598891A (en) * | 1991-10-14 | 1993-04-20 | Hitachi Ltd | Tunnel provided with compression wave suppressing device |
| CN103046934A (en) * | 2012-12-14 | 2013-04-17 | 太原理工大学 | Method retaining and protecting soft surrounding rock roadways by placing hole pressure relief materials |
| CN203655325U (en) * | 2014-01-06 | 2014-06-18 | 安徽理工大学 | Deep underground roadway support mechanism |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047612A (en) * | 2014-06-25 | 2014-09-17 | 安徽理工大学 | Stretchable combined support structure for deep roadway |
| CN104612705A (en) * | 2014-12-11 | 2015-05-13 | 中国矿业大学 | Roadway support method for preventing rock burst |
| CN110469342A (en) * | 2019-09-11 | 2019-11-19 | 华北科技学院 | A kind of gob side entry based on flexible in conjunction with rigid phase is asymmetric to cooperate with suspension device |
| CN111140266A (en) * | 2020-03-05 | 2020-05-12 | 西南交通大学 | Tunnel supporting structure suitable for large deformation of soft rock and construction method thereof |
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Application publication date: 20140423 |