CN104110015B - A kind of installation method of tunnel safety guard net - Google Patents
A kind of installation method of tunnel safety guard net Download PDFInfo
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- CN104110015B CN104110015B CN201410368704.4A CN201410368704A CN104110015B CN 104110015 B CN104110015 B CN 104110015B CN 201410368704 A CN201410368704 A CN 201410368704A CN 104110015 B CN104110015 B CN 104110015B
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- supporting steel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of tunnel safety guard net and installation method.Aim to provide the tunnel safety guard net that a kind of mounting or dismounting are convenient, barrier propterty is good, with low cost.Fix with the anchor pole of tunnel crown when this tunnel safety guard net is installed and be connected, it includes fixing the supporting steel netting being connected with anchor pole, is fixedly connected on the SO/2.2/50 shaped steel wire grid below supporting steel netting and is arranged at the DO/08/300 shaped steel wire netting below SO/2.2/50 shaped steel wire grid；The steel cable that described supporting steel netting adopts diameter to be φ 16 is made, and Mesh distance is 4500 × 4500；The stitching rope of described DO/08/300 shaped steel wire netting employing φ 8 is fixing with supporting steel netting to be connected.This tunnel protection network is installed to be substantially reduced tunnel crown and fall the threat constructed in lower section by block, eliminates tunnel and fall the potential safety hazard of block, ensured workmen and equipment safety in tunnel, produced good economic and social benefit.
Description
Technical field
The present invention relates in water conservancy and hydropower civil engineering technical field, especially relate to a kind of tunnel safety guard net and installation method.
Background technology
Tunnel of large section excavation all adopts stage excavation from top to bottom, after tunnel top layer excavation supporting completes, in middle lower floor digging process, tunnel crown Stress relief has one to last process, thus causing the concrete of tunnel crown spray or a part of rock to come off, fall block, tunnel bottom workmen and machinery are caused certain security threat.For this situation, conventional process mode is mainly employing human at periodic intervals or irregularly makes an inspection tour, investigates, it has been found that crack occur in concrete or the rock stratum of tunnel crown spray, takes the mechanical sled clearly of hand fit to process, and its construction risk is high, safety randomness is very big.
Summary of the invention
Instant invention overcomes shortcoming of the prior art, it is provided that a kind of mounting or dismounting are convenient, barrier propterty is good tunnel safety guard net and installation method.
In order to solve above-mentioned technical problem, the present invention is achieved by the following technical solutions: a kind of tunnel safety guard net, fix with the anchor pole of tunnel crown during installation and be connected, it includes fixing the supporting steel netting being connected with anchor pole, is fixedly connected on the SO/2.2/50 shaped steel wire grid below supporting steel netting and is arranged at the DO/08/300 shaped steel wire netting below SO/2.2/50 shaped steel wire grid；The steel cable that described supporting steel netting adopts diameter to be φ 16 is made, and Mesh distance is 4500 × 4500；The stitching rope of described DO/08/300 shaped steel wire netting employing φ 8 is fixing with supporting steel netting to be connected.
Preferably, described supporting steel netting employing 32U shape card and anchor pole are fixed and are connected.
Preferably, the spacing between described 32U shape card is not more than 3m.
Preferably, described SO/2.2/50 shaped steel wire grid adopts the iron wire of diameter 1.2mm to be connected with supporting steel netting colligation, and colligation internodal is not more than 1m.
Preferably, between described SO/2.2/50 shaped steel wire grid, lap width is not less than 5cm.
The installation method of this tunnel protection network is as follows:
1) installation of supporting steel netting
Supporting steel netting is tunnel protection network main bearing member, and supporting steel netting all adopts φ 16 steel cable, and Mesh distance is 4500 × 4500；During supporting steel netting dress, vertically and horizontally adopting 32U shape card to fix with the anchor pole on crown, constant spacing is not more than 3m, is not less than the stringing calabash tensioning of 10kN time fixing with tightening force.
2) paving hangs grid
Tunnel safety guard net uses the SO/2.2/50 shaped steel wire grid of GPS2 type active protecting net Plays, and the steel wire diameter of this steel wire grid net is 2.2mm, mesh size 50m × 50mm, and steel wire grid net installation requirement is as follows:
After supporting steel netting installs, whole zone of protection lays steel wire grid net, and steel wire grid net is positioned at system intermediate layer and is close to concrete surface, and supporting steel netting is above it；
Steel wire grid net adopts the iron wire of diameter 1.2mm to be connected with supporting steel netting colligation, and colligation internodal is not more than 1m；
Between steel wire grid net, lap width is not less than 5cm, can adopt the iron wire ligation of diameter 1.2mm；
3) stitching of wire rope net is installed
Tunnel protection network uses the DO/08/300 shaped steel wire netting of GPS2 type active protecting net Plays, the cable diameter 8mm of this wire rope net, mesh size 300m × 300mm；
In each linked network region, order paving hangs wire rope net, sewing up with φ 8 restricts to carry out wire rope net with supporting rope or adjacent net block edge sewing up simultaneously is connected, sew up rope two ends should the stacked length being not less than 0.5m, two ends are respectively fixed with two wire clips and steel rope net and are connected；
When single stitching rope error in length is bigger, then unnecessary end may extend into adjacent linked network unit, and not enough length is also supplemented by the stitching rope of next adjacent linked network.
This tunnel protection network is between active and passive protection network, it it is the combination of active and passive protection network, almost it is close to the scar of tunnel crown during installation, utilizes anchor pole and tunnel protection network coaction that tunnel exposes, effectively can protect tunnel top pneumatically placed concrete or rock falls block by pocket.
Compared with prior art, present invention have the advantage that
(1) this tunnel protection network is between active and passive protection network, it it is the combination of active and passive protection network, the scar of tunnel crown almost it is close to during installation, utilize anchor pole and tunnel protection network coaction that tunnel exposes, effectively tunnel top pneumatically placed concrete can be protected or rock falls block, the utilization of this new technique by pocket, the construction safety of lower floor's excavation supporting can be substantially reduced in tunnel, accelerating construction progress, saves the duration.Its structure is reliable, and processing and fabricating is simple, is especially suitable for spread and uses.
(2) this tunnel protection network is especially extremely effective to high tunnel of large section, tunnel crown can be eliminated and fall the potential safety hazard of block, it is substantially reduced tunnel and pushes away the threat constructed in lower section by block, workmen and equipment safety in tunnel are ensured, reduce unnecessary economic loss, produce good economic and social benefit.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the partial structurtes scheme of installation of the present invention.
Fig. 2 is the partial structurtes planar development schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not paying creative work premise, broadly fall into the scope of protection of the invention.
Tunnel safety guard net shown in Fig. 1 and Fig. 2, fix with the anchor pole 1 of tunnel crown 8 during installation and be connected, including the supporting steel netting 2 that is connected fixing with anchor pole 1, it is fixedly connected on the SO/2.2/50 shaped steel wire grid 3 below supporting steel netting 2 and is arranged at SO/2.2/50 shaped steel wire grid 3 DO/08/300 shaped steel wire netting 4 below；The steel cable that described supporting steel netting 2 adopts diameter to be φ 16 is made, and Mesh distance is 4500 × 4500；Described DO/08/300 shaped steel wire netting 4 adopts that the stitching rope 5 of φ 8 is fixing with supporting steel netting 2 to be connected.
Described supporting steel netting 2 preferably employs that 32U shape card 6 and anchor pole 1 is fixing to be connected, and the spacing between described 32U shape card 6 is not more than 3m.Described SO/2.2/50 shaped steel wire grid 3 preferably employs the iron wire 7 of diameter 1.2mm and is connected with supporting steel netting 2 colligation, and colligation internodal is not more than 1m.Between described SO/2.2/50 shaped steel wire grid 3, lap width is not less than 5cm.
The installation method of tunnel protection network is as follows:
1) installation of supporting steel netting
Supporting steel netting is tunnel protection network main bearing member, and supporting steel netting all adopts φ 16 steel cable, and Mesh distance is 4500 × 4500.During supporting steel netting dress, vertically and horizontally adopting 32U shape card to fix with the anchor pole on crown, constant spacing is not more than 3m, is not less than the stringing calabash tensioning of 10kN time fixing with tightening force.
2) paving hangs grid
Tunnel safety guard net uses the SO/2.2/50 shaped steel wire grid of GPS2 type active protecting net Plays, and the steel wire diameter of this steel wire grid net is 2.2mm, mesh size 50m × 50mm.Steel wire grid net installation requirement is as follows:
After supporting steel netting installs, whole zone of protection lays steel wire grid net, and steel wire grid net is positioned at system intermediate layer and is close to concrete surface, and supporting steel netting is above it.
Steel wire grid net adopts the iron wire of diameter 1.2mm to be connected with supporting steel netting colligation, and colligation internodal is not more than 1m.
Between steel wire grid net, lap width is not less than 5cm, can adopt the iron wire ligation of diameter 1.2mm.
3) stitching of wire rope net is installed
Tunnel protection network uses the DO/08/300 shaped steel wire netting of GPS2 type active protecting net Plays, the cable diameter 8mm of this wire rope net, mesh size 300m × 300mm.
In each linked network region, order paving hangs wire rope net, sewing up with φ 8 restricts to carry out wire rope net with supporting rope or adjacent net block edge sewing up simultaneously is connected, sew up rope two ends should the stacked length being not less than 0.5m, two ends are respectively fixed with two wire clips and steel rope net and are connected.
When single stitching rope error in length is bigger, then unnecessary end may extend into adjacent linked network unit, and not enough length is also supplemented by the stitching rope of next adjacent linked network.
This tunnel protection network is between active and passive protection network, it it is the combination of active and passive protection network, almost it is close to the scar of tunnel crown during installation, utilizes anchor pole and tunnel protection network coaction that tunnel exposes, effectively can protect tunnel top pneumatically placed concrete or rock falls block by pocket.The utilization of this new technique, can be substantially reduced in tunnel the construction safety of lower floor's excavation supporting, accelerating construction progress, saves the duration.Its structure is reliable, and processing and fabricating is simple, is especially suitable for spread and uses.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (1)
1. the installation method of a tunnel safety guard net, it is characterized in that: tunnel safety guard net includes the supporting steel netting (2) that is connected fixing with anchor pole (1), be fixedly connected on following SO/2.2/50 shaped steel wire grid (3) of supporting steel netting (2) and be arranged at SO/2.2/50 shaped steel wire grid (3) DO/08/300 shaped steel wire netting (4) below；The steel cable that described supporting steel netting (2) adopts diameter to be φ 16 is made, and Mesh distance is 4500 × 4500；The stitching rope (5) of described DO/08/300 shaped steel wire netting (4) employing φ 8 is fixing with supporting steel netting (2) to be connected；Installation method is carried out as follows:
1) installation of supporting steel netting
Supporting steel netting is tunnel protection network main bearing member, and supporting steel netting all adopts φ 16mm steel cable, and Mesh distance is 4500 × 4500；
When supporting steel netting is installed, vertically and horizontally adopting 32U shape card to fix with the anchor pole on crown, constant spacing is not more than 3m, is not less than the stringing calabash tensioning of 10kN time fixing with tightening force；
2) paving hangs grid
Tunnel safety guard net uses the SO/2.2/50 shaped steel wire grid of GPS2 type active protecting net Plays, and the steel wire diameter of this steel wire grid net is 2.2mm, mesh size 50m × 50mm, and steel wire grid net installation requirement is as follows:
After supporting steel netting installs, whole zone of protection lays steel wire grid net, and steel wire grid net is positioned at system intermediate layer and is close to concrete surface, and supporting steel netting is above it；
Steel wire grid net adopts the iron wire of diameter 1.2mm to be connected with supporting steel netting colligation, and colligation internodal is not more than 1m；
Between steel wire grid net, lap width is not less than 5cm, adopts the iron wire ligation of diameter 1.2mm；
3) stitching of wire rope net is installed
Tunnel protection network uses the DO/08/300 shaped steel wire netting of GPS2 type active protecting net Plays, the cable diameter 8mm of this wire rope net, mesh size 300m × 300mm；
In each linked network region, order paving hangs wire rope net, sewing up with φ 8mm restricts to carry out wire rope net with supporting steel netting or adjacent net block edge sewing up simultaneously is connected, sewing up the rope stacked length being not less than 0.5m of two ends, two ends are respectively connected with two wire clips and wire rope net are fixing；
When single stitching rope error in length is bigger, then unnecessary end may extend into adjacent linked network unit, and not enough length is also supplemented by the stitching rope of next adjacent linked network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410368704.4A CN104110015B (en) | 2014-07-30 | 2014-07-30 | A kind of installation method of tunnel safety guard net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410368704.4A CN104110015B (en) | 2014-07-30 | 2014-07-30 | A kind of installation method of tunnel safety guard net |
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| CN104110015A CN104110015A (en) | 2014-10-22 |
| CN104110015B true CN104110015B (en) | 2016-06-29 |
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| CN201410368704.4A Active CN104110015B (en) | 2014-07-30 | 2014-07-30 | A kind of installation method of tunnel safety guard net |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105401956B (en) * | 2015-12-24 | 2018-10-12 | 四川川交路桥有限责任公司 | A kind of flexible protective device and construction method of the anti-rock burst falling rocks of tunnel excavation |
| CN108661663B (en) * | 2017-03-28 | 2020-06-30 | 北京爱卓达科技有限公司 | Method for reinforcing insulating protective net in lining-free tunnel |
| CN108411924B (en) * | 2018-02-09 | 2020-03-13 | 中建五局第三建设有限公司 | Construction method for mine pit wall safety protection |
| CN108505755A (en) * | 2018-04-13 | 2018-09-07 | 方高健 | One kind preventing fire-retardant protection network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101709650A (en) * | 2009-12-03 | 2010-05-19 | 中冶集团华冶资源开发有限责任公司 | Method for supporting steel grating |
| KR20120050605A (en) * | 2010-11-11 | 2012-05-21 | 디앤씨건설 주식회사 | Structure of reinforcing net of tunnel |
| CN103572761B (en) * | 2012-07-19 | 2016-05-11 | 中铁十九局集团第二工程有限公司 | A kind of method of utilizing Brooker protection network to protect while closing on both wired constructions |
| CN102926549B (en) * | 2012-11-22 | 2015-04-01 | 中冶建工集团有限公司 | Manufacturing method for building safety vertical net |
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