CN112012769A - Semi-rigid and semi-flexible anti-impact tunnel surrounding rock supporting structure under seismic belt and construction method thereof - Google Patents
Semi-rigid and semi-flexible anti-impact tunnel surrounding rock supporting structure under seismic belt and construction method thereof Download PDFInfo
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- CN112012769A CN112012769A CN201910473735.9A CN201910473735A CN112012769A CN 112012769 A CN112012769 A CN 112012769A CN 201910473735 A CN201910473735 A CN 201910473735A CN 112012769 A CN112012769 A CN 112012769A
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- porous metal
- surrounding rock
- rigid
- supporting structure
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- 239000011435 rock Substances 0.000 title claims abstract description 47
- 238000010276 construction Methods 0.000 title claims abstract description 28
- 239000004567 concrete Substances 0.000 claims abstract description 8
- 239000007769 metal material Substances 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims description 47
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 238000004873 anchoring Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 2
- 239000011378 shotcrete Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
A semi-rigid and semi-flexible anti-impact tunnel surrounding rock supporting structure under a seismic belt and a construction method thereof are disclosed. Through increasing porous metal material on rigid support structure, can guarantee the security of rigid support to increase the security of enclosing the rock mass, reduce the impact of impact load to supporting construction, porous metal material can adsorb the concrete, increases the holistic and wall body's of stock cohesiveness, receives the impact back, has higher rigidity after the porous metal material compression, can guarantee the safe construction in tunnel, improves the stability among the tunnel construction process.
Description
Technical Field
The invention relates to a surrounding rock supporting structure, in particular to a surrounding rock supporting structure of a semi-rigid and semi-flexible anti-impact tunnel under a seismic belt and a construction method thereof.
Background
The tunnel supporting system has the basic functions of maintaining the long-term stability of the surrounding rock, causing deformation damage and stress redistribution of the surrounding rock due to tunnel engineering activities, transferring most of the load of the surrounding rock to an adjacent stratum along with stress release due to the self-restraint action of the surrounding rock, and having low engineering response accumulation degree when the surrounding rock conditions are good, no threat to construction safety and no essential supporting; when the surrounding rock can not realize self-balance, external intervention is needed, namely a supporting structure needs to be applied timely to bear additional load induced by construction.
At present, the anti-impact support mode mainly comprises anchor rods, section steel, sprayed concrete support, shed cable cooperative support and the like. The anchor rod supporting technology is an economical and reasonable supporting means in various supports, is widely applied to coal mines, metal mines, hydraulic engineering, tunnels and other underground engineering, but is difficult to popularize and apply in surrounding rock supporting under the action of dynamic load because the surrounding rock deformation allowed by an anchor rod system is small. The profile steel support can provide higher supporting capacity, but if the effective filling treatment cannot be carried out after the support wall, the stress of the support is uneven, the supporting capacity cannot be fully exerted, and the overall instability damage is very easy to occur during the impact action. The sprayed concrete support can enhance the surface strength of the surrounding rock to a certain extent, plays a role in reducing and preventing the deformation of the surrounding rock, but does not contribute much in the aspect of resisting impact load. The shed cable is cooperated with the support to enhance the strength of surrounding rocks and improve the support capability, and the support is still insufficient under the action of shock waves. Meanwhile, a large number of support damage statistical results show that the support damage is not caused by insufficient support strength.
At present, the adopted surrounding rock supporting structure has defects, due to the vibration effect of an external load, the supporting structure is easy to break or even collapse, the surrounding rock structure in the tunnel is damaged or collapsed, unsafe factors exist, and the construction safety cannot be guaranteed.
Disclosure of Invention
The problem of because outer load vibrations effect, lead to supporting construction fracture even collapse easily, cause in the tunnel that the country rock structure is impaired or collapses, there is unsafe factor, can't guarantee the security of construction etc. is solved in order to solve.
The invention provides a semi-rigid and semi-flexible anti-impact tunnel surrounding rock supporting structure under an earthquake zone and a construction method thereof.
The invention adopts the following technical scheme:
a semi-rigid and semi-flexible anti-impact tunnel surrounding rock supporting structure under a seismic belt and a construction method thereof are disclosed.
Preferably, the aperture of the porous metal wallboard and the porous metal sleeve is 10-18 mm, and the aperture of the porous metal backing plate is 4-7 mm.
Preferably, the radius of the pull rod is 25-35 mm, and the length of the pull rod is 3-4 m.
Preferably, the pull rods are arranged along the edge of the tunnel at intervals of 0.7-1.4 m, the pull rods are arranged in a plum blossom shape or a rectangular shape, and the horizontal intervals and the vertical intervals between the pull rods are 1.4-1.8 m.
Preferably, the porous metal sleeve is installed on the pull rod, the pull rod is fixed by an anchorage device, and a device for connecting the pull rod with the porous metal sleeve is sent into the anchor hole and pushed to a preset position.
Preferably, the porous metal wallboard, the porous metal sleeve and the porous metal backing plate are made of porous metal materials.
Preferably, the rigid support is a reinforcing mesh made of steel bars.
The semi-rigid and semi-flexible anti-impact tunnel surrounding rock supporting structure under the seismic belt and the construction method thereof comprise the following specific construction steps:
A) excavating the tunnel according to the shape and the size of the designed section of the tunnel, and spraying a concrete leveling layer with the thickness of 50mm on the surface of the surrounding rock mass, wherein the design strength is not lower than C20;
B) after the concrete leveling layer is initially set, drilling a hole downwards in the surrounding rock body, wherein the inclination angle is 15-25 degrees, driving the pull rod and the porous metal sleeve into the surrounding rock to be exposed, and grouting and reinforcing the periphery of the pull rod by grouting equipment;
C) after the pull rod is gradually stabilized, the porous metal wallboard is laid, and the porous metal wallboard and the rigid support are fixed by adopting temporary fixing;
D) after the porous metal wall plate and the rigid support are fixed, anchoring the end part of the pull rod, the porous metal wall plate and the rigid support by using an anchorage device and a pedestal, and then spraying a concrete layer by using a guniting device.
The invention has the beneficial effects that: add porous metal wallboard and the outside porous metal sleeve that increases of pull rod in the middle of surrounding rock body and rigid support to and increase the porous metal backing plate, can guarantee the security of rigid support, so as to increase the security of surrounding rock body, porous metal material has better energy-absorbing effect and shock attenuation effect, reduce the impact action of impact load to supporting construction, porous metal material can adsorb the concrete, increase the holistic cohesiveness with the wall body of stock, receive the impact back, porous metal material has higher rigidity after the compression, can guarantee the safe construction in tunnel, stability among the improvement tunnel construction process.
Drawings
Fig. 1 is a schematic view of a semi-rigid semi-flexible supporting structure of the present invention.
Fig. 2 is a schematic view of the structure of the wall part of the present invention.
Fig. 3 is a schematic structural diagram of the anchor rod part of the invention.
FIG. 4 is a schematic view of an anchor assembly according to the present invention.
In the figure, 1, a surrounding rock body, 2, a porous metal wallboard, 3, a rigid support, 4, a pull rod, 5, an anchorage device, 6, a pedestal, 7, a porous metal backing plate, 8, a porous metal sleeve, 9, a baffle and 10, a drill bit.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
the semi-rigid and semi-flexible anti-impact tunnel surrounding rock supporting structure under the seismic belt comprises a surrounding rock body 1, a porous metal wall plate 2, a rigid support 3, a pull rod 4, an anchor 5, a pedestal 6, a porous metal base plate 7, a porous metal sleeve 8, a baffle 9 and a drill bit 10, wherein the porous metal wall plate 2 is arranged outside the surrounding rock body 1, the rigid support 3 is arranged outside the porous metal wall plate 2, the porous metal sleeve 8 is sleeved on the pull rod 4, the porous metal base plate 7 and the pedestal 6 are installed on the pull rod 4, the anchor 5 is arranged outside the pedestal 6, the anchor 5 is installed at the end part of the pull rod 4, and the baffle 9 and the drill bit 10 are installed at the bottom of the pull.
The tunnel is excavated to 1.6-3.0 m, a hole is drilled downwards towards the surrounding rock mass 1 in an inclined angle of 15-25 degrees, the rod bodies of the pull rods 4 and the porous metal sleeves 8 are placed in the hole, the hole is drilled in the tunnel according to the preset position, the distance is 0.7-1.4 m, the pull rods 4 are arranged in a plum blossom shape or a rectangular shape, the horizontal distance and the vertical distance between the pull rods 4 are 1.4-1.8 m, the hole diameter is 100-150 mm, and the hole depth is 3.2-4.2 m.
When the device is used, the baffle 9 and the drill bit 10 are installed at the bottom of the pull rod 4, then the porous metal sleeve 8 is installed on the pull rod 4, the installed pull rod 4 is installed inside a wall body, the porous metal wall plate 2 and the rigid support 3 are installed on the surrounding rock body 1, the top of the pull rod 4 is clamped on the rigid support 3, the porous metal base plate 7 and the pedestal 6 are installed at the top of the pull rod 4, and the pull rod 4 and the rigid support 3 are fixed on the wall body through the anchor 5.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (8)
1. A semi-rigid and semi-flexible anti-impact tunnel surrounding rock supporting structure under a seismic belt and a construction method thereof are composed of a surrounding rock body, a porous metal wall plate, a rigid support, a pull rod, an anchor device, a pedestal, a porous metal base plate, a porous metal sleeve, a baffle and a drill bit.
2. The surrounding rock supporting structure of the semi-rigid and semi-flexible anti-impact tunnel under the seismic zone and the construction method of the surrounding rock supporting structure are characterized in that the pore diameters of the porous metal wall plates and the porous metal sleeves are 10-18 mm, and the pore diameters of the porous metal base plates are 4-7 mm.
3. The semi-rigid and semi-flexible impact-resistant tunnel surrounding rock supporting structure under the seismic belt and the construction method thereof as claimed in claim 1, wherein the radius of the pull rod is 25-35 mm, and the length is 3-4 m.
4. The semi-rigid and semi-flexible impact-resistant tunnel surrounding rock supporting structure under the seismic zone and the construction method thereof as claimed in claim 1, wherein the pull rods are arranged along the edge of the tunnel at intervals of 0.7-1.4 m, the pull rods are arranged in a plum blossom shape or a rectangular shape, and the horizontal intervals and the vertical intervals between the pull rods are 1.4-1.8 m.
5. The surrounding rock supporting structure of the semi-rigid and semi-flexible anti-impact tunnel under the earthquake zone and the construction method thereof as claimed in claim 1, wherein the pull rod is firstly installed with a porous metal sleeve, and fixed by an anchorage device, and a device for connecting the pull rod with the porous metal sleeve is sent into an anchor hole and pushed to a preset position.
6. The semi-rigid and semi-flexible impact-resistant tunnel surrounding rock supporting structure under the earthquake zone and the construction method thereof as claimed in claim 1, wherein the porous metal wall plate, the porous metal sleeve and the porous metal backing plate are all made of porous metal materials.
7. The semi-rigid and semi-flexible anti-impact tunnel surrounding rock supporting structure under the earthquake zone and the construction method thereof as claimed in claim 1, wherein the rigid support is a reinforcing mesh made of reinforcing steel bars.
8. The semi-rigid and semi-flexible anti-impact tunnel surrounding rock supporting structure under the seismic zone and the construction method thereof as claimed in claim 1, characterized by comprising the following construction steps:
A) excavating the tunnel according to the shape and the size of the designed section of the tunnel, and spraying a concrete leveling layer with the thickness of 50mm on the surface of the surrounding rock mass, wherein the design strength is not lower than C20;
B) after the concrete leveling layer is initially set, drilling a hole downwards in the surrounding rock body, wherein the inclination angle is 15-25 degrees, driving the pull rod and the porous metal sleeve into the surrounding rock to be exposed, and grouting and reinforcing the periphery of the pull rod by grouting equipment;
C) after the pull rod is gradually stabilized, the porous metal wallboard is laid, and the porous metal wallboard and the rigid support are fixed by adopting temporary fixing;
D) after the porous metal wall plate and the rigid support are fixed, anchoring the end part of the pull rod, the porous metal wall plate and the rigid support by using an anchorage device and a pedestal, and then spraying a concrete layer by using a guniting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910473735.9A CN112012769A (en) | 2019-06-01 | 2019-06-01 | Semi-rigid and semi-flexible anti-impact tunnel surrounding rock supporting structure under seismic belt and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910473735.9A CN112012769A (en) | 2019-06-01 | 2019-06-01 | Semi-rigid and semi-flexible anti-impact tunnel surrounding rock supporting structure under seismic belt and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112012769A true CN112012769A (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910473735.9A Pending CN112012769A (en) | 2019-06-01 | 2019-06-01 | Semi-rigid and semi-flexible anti-impact tunnel surrounding rock supporting structure under seismic belt and construction method thereof |
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| CN (1) | CN112012769A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648332A (en) * | 2020-12-03 | 2021-04-13 | 北京科技大学 | Spherical cell hole ladder-shaped deformation ore pressure controller and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102652227A (en) * | 2009-12-18 | 2012-08-29 | 费希尔厂有限责任两合公司 | Anchor sleeve |
| CN103557008A (en) * | 2013-11-06 | 2014-02-05 | 中国矿业大学 | Thin-walled metal structure and tunnel anchoring surrounding rock coupled anti-scour supporting structure |
| CN104453914A (en) * | 2014-10-21 | 2015-03-25 | 新汶矿业集团有限责任公司 | Construction method of impact prevention and shock absorption supporting structure of ingate |
| EP3135861A1 (en) * | 2015-08-26 | 2017-03-01 | Ludwig Meese | Attachment device |
| CN109339835A (en) * | 2018-11-08 | 2019-02-15 | 杭州图强工程材料有限公司 | A kind of anchoring system and underground engineering construction method |
-
2019
- 2019-06-01 CN CN201910473735.9A patent/CN112012769A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102652227A (en) * | 2009-12-18 | 2012-08-29 | 费希尔厂有限责任两合公司 | Anchor sleeve |
| CN103557008A (en) * | 2013-11-06 | 2014-02-05 | 中国矿业大学 | Thin-walled metal structure and tunnel anchoring surrounding rock coupled anti-scour supporting structure |
| CN104453914A (en) * | 2014-10-21 | 2015-03-25 | 新汶矿业集团有限责任公司 | Construction method of impact prevention and shock absorption supporting structure of ingate |
| EP3135861A1 (en) * | 2015-08-26 | 2017-03-01 | Ludwig Meese | Attachment device |
| CN109339835A (en) * | 2018-11-08 | 2019-02-15 | 杭州图强工程材料有限公司 | A kind of anchoring system and underground engineering construction method |
Non-Patent Citations (1)
| Title |
|---|
| 王路: "锚杆(索)-泡沫铝联合支护冲击地压巷道机理研究", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648332A (en) * | 2020-12-03 | 2021-04-13 | 北京科技大学 | Spherical cell hole ladder-shaped deformation ore pressure controller and method |
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