CN205243522U - Tunnel excavation prevents flexible protection device of rock burst falling rocks - Google Patents
Tunnel excavation prevents flexible protection device of rock burst falling rocks Download PDFInfo
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- CN205243522U CN205243522U CN201521103443.XU CN201521103443U CN205243522U CN 205243522 U CN205243522 U CN 205243522U CN 201521103443 U CN201521103443 U CN 201521103443U CN 205243522 U CN205243522 U CN 205243522U
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- rope
- net
- protective device
- flexible protective
- rock
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Abstract
The utility model discloses a tunnel excavation prevents flexible protection device of rock burst falling rocks, include: the steel cable is netted (1), is sewed up rope (2), expansion type anchor bolt (3), supporting rope (8) and fixed plate (10), and the positive square gridding of chiasma formation between each supporting rope (8) sews up in each net through sewing up rope (2) with the steel cable net (1) that net quantity equals, sews up rope (2) and carries out the pretension with the euphroe, the device can improve the stability of rock mass, reduces country rock exposure time, stops the rock burst to collapse the emergence of stone as far as possible to collapse the stone restriction with the fritter in certain space, solves the rock burst falling rocks problem that probably takes place betterly after the tunnel excavation blasting is strutted.
Description
Technical field
The utility model is applicable to buried rock matter tunnel construction technical field, by adopting soft protecting net to naked holeHole wall carries out active protection, and the supporting while construction as tunnel rock burst section, greatly reduces rock burst falling rocks to follow-up constructorThe security threat of member and construction machinery.
Background technology
Along with the quickening that national basis is built, Transport Facility Construction has also obtained tremendous development. Er highway and railway constructionIn build tunnel and can greatly reduce running distance, shorten running time, improve the security of driving, can save simultaneouslyGround land used, plays the effect of protection of the environment. Along with the develop rapidly of Tunnel Engineering, in tunnel construction, also occur oneA little problems, particularly along with the continuous increase of edpth of tunnel, a lot of hard rock tunnel have been passed through high-ground stress region. On highlandStress area Rock-burst occurs repeatedly. Rock burst meeting causes hole wall rock to peel off, and serious meeting produces launches phenomenon and rockRaw being difficult to of outburst predicted, workmen and machinery have been formed to great potential safety hazard. How to avoid high-ground stress conditionThe falling rocks that lower rock burst causes launches phenomenon, ensures that it is current traffic that tunnel excavation explosion completes tunnel support job safety afterwardsUrgent problem in the underground engineering constructions such as tunnel, mainly takes following several measure: (1) at present in rock burst locationBeat anchor pole hole at face and excavation cavern periphery and carry out pressure release processing; (2) increase Blasting Excavation and subsequent handling timeBetween interval, allow stress discharge, and said method has all affected construction speed to a certain extent, and has been difficult to accurately reallyDetermine stress release degree, be therefore necessary rock burst location to carry out active support, in ensureing construction speed, guarantee to executeThe safety of workman person and machinery.
Utility model content
The purpose of this utility model is carried out active support to hole wall after being to provide a kind of tunnel blasting excavation, reduces country rock sudden and violentDew time, the flexible protective device that prevents rock burst falling rocks and construction technology thereof. Flexible net supporting obvious characteristic is employing systemAnchor pole is fixed, and comes flexible net part to realize pre-, thereby whole scar is formed continuously by supporting rope and stitching stretch-drawSupport, thereby realize initiatively safeguard function. Flexible net system can evenly be transmitted concentration of local load fully to send out to surroundingWave the protective capacities of whole system, i.e. local stand under load, mass action, thus make system can bear larger load.
This device can improve the stability of rock mass, reduces country rock open-assembly time, stops as much as possible rock burst to collapse the generation of stone,And fritter is collapsed to stone be limited in certain space, solve preferably contingent rock burst falling rocks after tunnel excavation explosion supportingProblem. In the higher constructing tunnel of Grades of Surrounding Rock, can utilize flexible protective measure as the supporting after excavating simultaneously,Make concrete spraying support depart from excavation circulation, i.e. concrete spraying support operation can lag behind face excavation construction(keeping in the reasonable scope), thus can make gunite concrete and jewel hole carry out simultaneously, shorten the single cycle time, carryHigh efficiency of construction.
In order to achieve the above object, the utility model has adopted following technical scheme:
A flexible protective device for the anti-rock burst falling rocks of tunnel excavation, comprising: steel rope net (1), stitching are restricted (2), shell risesFormula anchor pole (3), supporting rope (8) and fixed head (10), each supporting rope intersects to form square net between (8),The steel rope net (1) equating with number of grid by stitching restrict (2) be sewn in each grid, sew up rope (2) with tightRope device carries out pretension; The position that supporting rope (8) intersects forms the node of each grid, and the node described in each is through risingThe anchor pole of shell anchor rod (3) exposes ring set (4), and after supporting rope (8) stretch-draw is tight, its two ends with wire clips withAnchor pole exposes ring set (4) and is fixedly connected with; Expansion type rock bolt (3) is anchored in the bolthole that zone of protection bores; OftenOpen the country rock face of the position of steel rope net (1) central authorities and hole, and adopt cement mortar by the bolt of fixed head (10)Be fixed in boring, it is upper that fixed head (10) is pressed on steel rope net (1), makes steel rope net (1) laminating tunnel scar (11).
Described flexible protective device, the specification of steel rope net (1) is: aperture 80mm × 80mm, cable diameter is Φ 8.
Described flexible protective device, sewing up rope (2) specification is Φ 8 steel cables.
Described flexible protective device, supporting rope specification isSteel cable.
Described flexible protective device, expansion type rock bolt (3) is R25 expansion type rock bolt.
Described flexible protective device, square net specification is 1.5m × 1.5m.
Compared with prior art, the beneficial effects of the utility model are:
1, the utility model utilizes steel wire rope to have the feature of certain flexibility, is equipped with expansion type rock bolt, can be effectively stableCountry rock, prevents rock burst falling rocks, ensures operating personnel's safety;
2, the active flexible protective system taking galvanizing high strength wire rope as main material has high tenacity, high protection is strongDegree, easily sprawls, installation procedure standardization, the advantages such as systematization. More quick than stand supporting, easy and simple to handle, can haveEnhancing productivity of effect, reduces the construction operation time.
3, the life-span is longer: adopt the active flexible protective system of galvanizing high strength wire rope as system main material,The special fabrication processes of its material and high antiseptic and rustproof technology, determined that the life-span of system is longer, by a large amount of both at home and abroadTest and study discovery, its protection service life can be for 30-50.
4, after excavation, adopt soft protecting net to carry out active protection and replace concrete spraying support timely, in country rock levelIn I-III level country rock, can ensure construction safety preferably, can realize combined bolting and shotcrete simultaneously and pop to dig with brill and separate,Shorten excavation circulation, improve efficiency of construction.
5, flexible net supporting is saved construction costs more than traditional stand supporting, and can reach economic optimization, engineering constructionOptimization, the optimized effect of protection effect.
Brief description of the drawings
Fig. 1 is soft protecting net installation drawing described in the utility model;
Fig. 2 is expansion type rock bolt described in utility model;
Fig. 3 is supporting rope scheme of installation described in utility model;
Fig. 4 fixed head scheme of installation;
Wherein, 1, steel rope net; 2, sew up rope; 3, expansion type rock bolt; 4, anchor pole exposes ring set; 5, nut; 6,Billet; 7, expansion shell type anchor head; 8, supporting rope; 9, wire clips; 10, fixed head, 11 tunnel scars.
Detailed description of the invention
Below in conjunction with accompanying drawing and specific implementation method, the utility model and construction technology are described further.
As Figure 1-4, the flexible protective device of the anti-rock burst falling rocks of tunnel excavation, comprising: steel rope net 1 (specification: netHole is 80mm × 80mm, cable diameter Φ 8), sew up rope 2 (specification Φ 8 steel cables), expansion type rock bolt 3 (specification R25),Supporting rope 8 and fixed head 10, intersect to form the square net of 1.5m × 1.5m, with grid between each supporting rope 8The equal steel rope net 1 of quantity is restricted and 2 is sewn in each grid by stitching, sews up rope 2 use euphroes and carries out pretension, makesSteel rope net 1 falls piece to scar or collapses stone to have better bearing capacity, to prevent the hurt sb.'s feelings generation of event of collapse rock-fall; SupportThe position that rope 8 intersects forms the node of each grid, and the node described in each exposes ring through the anchor pole of expansion type rock bolt 3Cover 4, and after supporting rope stretch-draw tight (being not less than the turnbuckle of 5KN with tightening force), at wire clips and anchor for its two endsBar exposes ring set 4 and is fixedly connected with; Expansion type rock bolt 3 is anchored in the bolthole that zone of protection bores; At every steel rope netThe country rock face of the position of 1 central authorities is holed, and adopts cement mortar that the bolt of fixed head 10 is fixed in boring, GuDetermine plate 10 and be pressed on steel rope net 1, make the steel rope net 1 tunnel scar 11 of fitting.
Construction method is as described below:
1 looks for top to zone of protection in advance, gets rid of danger stone, outstanding stone, and city's roads is determined bolthole position.
2 deep drillings on request clear hole, hole depth should be than more than the long 50mm of expansion type rock bolt 3 length, and aperture is 45mm,Insert expansion type rock bolt, the firmly pretension body of rod, ensures that left-handed anchor bar body is close to also in anchor head top and bottom, hole until after screwing,Backing plate, nut are installed again. Test pulling capacity.
3 frame supports rope 8 structures, adoptVertical, horizontal steel wire rope composition 1.5m × 1.5m square net, netLattice node exposes ring set 4 through anchor pole. Vertical, horizontal diameter after installationSupporting rope, (uses tightening force after stretch-draw is tightBeing not less than the turnbuckle of 5KN) two ends respectively expose ring set with two wire clips with anchor pole and are fixedly connected with.
4 framework steel rope nets, (the net of a 1.5m × 1.5m of laying in the each 1.5m × 1.5m grid forming at supporting ropeHole 80mm × 80mm)Steel rope net.
5 sew up, and between every steel rope net and surrounding supporting rope, useSteel cable is sewed up and is connect, and carries out pretension with euphroe,Make steel rope net 1 fall piece to scar or collapse stone and there is better bearing capacity, to prevent the hurt sb.'s feelings generation of event of collapse rock-fall.
6 mounting plates, hole at the country rock face of the position of every steel rope net 1 central authorities, and adopt the cement mortar willThe bolt of fixed head is fixed in boring, and fixed head 10 is pressed on steel rope net 1, makes steel rope net laminating tunnel scar 11.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert,And all these improvement and conversion all should belong to the protection domain of the utility model claims.
Claims (6)
1. a flexible protective device for the anti-rock burst falling rocks of tunnel excavation, is characterized in that, comprising: steel rope net (1),Sew up rope (2), expansion type rock bolt (3), supporting rope (8) and fixed head (10), between each supporting rope (8), hand overFork-shaped quadrate grid, the steel rope net equating with number of grid (1) by stitching restrict (2) be sewn in each grid,Sew up rope (2) and carry out pretension with euphroe; The position that supporting rope (8) intersects forms the node of each grid, each instituteThe node of stating exposes ring set (4) through the anchor pole of expansion type rock bolt (3), and after supporting rope (8) stretch-draw is tight, at itTwo ends exposes ring set (4) with wire clips and anchor pole and is fixedly connected with; Expansion type rock bolt (3) is anchored at that zone of protection boresIn bolthole; Country rock face in the central position of every steel rope net (1) is holed, and adopts cement mortar to fixThe bolt of plate (10) is fixed in boring, and it is upper that fixed head (10) is pressed on steel rope net (1), and steel rope net (1) is pastedClose tunnel scar (11).
2. flexible protective device according to claim 1, is characterized in that, the specification of steel rope net (1) is:Aperture 80mm × 80mm, cable diameter is Φ 8.
3. flexible protective device according to claim 1, is characterized in that, sewing up rope (2) specification is Φ 8Steel cable.
4. flexible protective device according to claim 1, is characterized in that, supporting rope specification is φ 16 steelRope.
5. flexible protective device according to claim 1, is characterized in that, expansion type rock bolt (3) is R25Expansion type rock bolt.
6. flexible protective device according to claim 1, is characterized in that, square net specification is 1.5m×1.5m。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521103443.XU CN205243522U (en) | 2015-12-24 | 2015-12-24 | Tunnel excavation prevents flexible protection device of rock burst falling rocks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521103443.XU CN205243522U (en) | 2015-12-24 | 2015-12-24 | Tunnel excavation prevents flexible protection device of rock burst falling rocks |
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| CN205243522U true CN205243522U (en) | 2016-05-18 |
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| CN201521103443.XU Expired - Fee Related CN205243522U (en) | 2015-12-24 | 2015-12-24 | Tunnel excavation prevents flexible protection device of rock burst falling rocks |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401956A (en) * | 2015-12-24 | 2016-03-16 | 四川川交路桥有限责任公司 | Anti-rock burst and anti-rockfall flexible protection device and construction method for tunnel excavation |
| CN106121684A (en) * | 2016-08-17 | 2016-11-16 | 国投新集能源股份有限公司 | A kind of jacking coal and rock suspension device and construction method thereof |
| CN107084649A (en) * | 2017-04-27 | 2017-08-22 | 中国十七冶集团有限公司 | A kind of high cut slope excavation blasting protection device and its application method |
| WO2018214518A1 (en) * | 2017-05-23 | 2018-11-29 | 山东大学 | Intelligent, flexible protection device for steel arch in case of tunnel rockfall collapse |
| CN110318763A (en) * | 2019-07-11 | 2019-10-11 | 中国水利水电建设工程咨询北京有限公司 | Multi-platform car-type excavation expansion of inclined well method |
-
2015
- 2015-12-24 CN CN201521103443.XU patent/CN205243522U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401956A (en) * | 2015-12-24 | 2016-03-16 | 四川川交路桥有限责任公司 | Anti-rock burst and anti-rockfall flexible protection device and construction method for tunnel excavation |
| 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 |
| CN106121684A (en) * | 2016-08-17 | 2016-11-16 | 国投新集能源股份有限公司 | A kind of jacking coal and rock suspension device and construction method thereof |
| CN106121684B (en) * | 2016-08-17 | 2018-11-30 | 国投新集能源股份有限公司 | A kind of construction method of jacking coal and rock suspension device |
| CN107084649A (en) * | 2017-04-27 | 2017-08-22 | 中国十七冶集团有限公司 | A kind of high cut slope excavation blasting protection device and its application method |
| WO2018214518A1 (en) * | 2017-05-23 | 2018-11-29 | 山东大学 | Intelligent, flexible protection device for steel arch in case of tunnel rockfall collapse |
| US10513924B2 (en) | 2017-05-23 | 2019-12-24 | Shandong University | Intelligent and flexible steel arch protection device for rockfall and collapse of tunnels |
| CN110318763A (en) * | 2019-07-11 | 2019-10-11 | 中国水利水电建设工程咨询北京有限公司 | Multi-platform car-type excavation expansion of inclined well method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160518 Termination date: 20181224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |