CN107795322A - A kind of assembly concrete arc plate and checkerboard type prestress anchorage cable composite supporting construction and its construction method - Google Patents
A kind of assembly concrete arc plate and checkerboard type prestress anchorage cable composite supporting construction and its construction method Download PDFInfo
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- CN107795322A CN107795322A CN201711078243.7A CN201711078243A CN107795322A CN 107795322 A CN107795322 A CN 107795322A CN 201711078243 A CN201711078243 A CN 201711078243A CN 107795322 A CN107795322 A CN 107795322A
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- steel wire
- wire rope
- anchor cable
- concrete
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- 239000004567 concrete Substances 0.000 title claims abstract description 71
- 230000008093 supporting effect Effects 0.000 title claims abstract description 59
- 238000010276 construction Methods 0.000 title claims abstract description 47
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 97
- 239000010959 steel Substances 0.000 claims abstract description 96
- 239000011435 rock Substances 0.000 claims abstract description 19
- 125000002950 monocyclic group Chemical group 0.000 claims abstract description 17
- 238000009826 distribution Methods 0.000 claims abstract description 3
- 239000002023 wood Substances 0.000 claims description 20
- 238000009434 installation Methods 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000007569 slipcasting Methods 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
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- 238000005516 engineering process Methods 0.000 abstract description 6
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- 238000010586 diagram Methods 0.000 description 5
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- 238000005065 mining Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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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
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The present invention relates to the assembled supporting construction and its construction method of a kind of chessboard distribution anchor cable and concrete slab, including concrete arc plate, four-way pallet, steel wire rope and prestress anchorage cable；The concrete arc plate circumferentially splices monocyclic concrete arc board mount, and the monocyclic concrete arc board mount connects as one along longitudinal direction with another monocyclic concrete arc board mount；Steel wire rope described in the inside multistage of supporting construction circumferentially forms checkerboard type steel wire rope Intranet with longitudinally connected respectively；The prestress anchorage cable mounting hole of more than 1 is offered on the concrete arc plate, concrete arc plate and steel wire rope are fixed on country rock by the anchor cable hole and anchor cable mounting hole of the anchor cable through four-way pallet.Still further comprise construction method.The invention greatly enhances the integer support effect of prestress anchorage cable, prevent single anchor cable independent stressed and destroy, with in the composite support of prefabricated assembled concrete arc plate, by anchor cable and prefabricated assembled concrete arc plate matched well, form combination of rigidity and flexibility support technology, deep-well tunnel Support Deformation can be effectively controlled, ensures stability of the roadway.
Description
Technical field
The present invention relates to underground engineering support field, and in particular to a kind of assembly concrete arc plate and checkerboard type prestressing force
Anchorage cable in compound support structure and its construction method.
Background technology
As coal mining depth further increases, deep-well tunnel supporting is more and more difficult, it has also become influences safety of coal mines
The major issue efficiently produced.Simple Bolt net and jet or U-shaped steel support can not meet supporting stability requirement, prestress anchorage cable
Support technology is promoted the use of in difficult supporting mining area, and some mine support works well, and also has part mine ineffective；Concrete
Arch walling support is in emphasis chamber using more, but live assembling reinforcement and casting concrete cause speed of application slow, strong concrete
Degree increases slowly, and stress crack easily occurs so as to reduce arch body total bearing capacity in age.
Through analysis, prestressing anchor support stream line discontinuity, anchor cable is single stress or 2-3 roots in most cases
Even stress in a row, tend not to play integer support effect, the excessive anchor cable of stress is several by premature degradation, the small anchor cable of stress
Do not change, but roadway support integer support effect if locally occurring destroying is had a greatly reduced quality, and therefore, how to make anchor cable branch
Shield forms tunneling boring integer support system, and some stress can distribute to whole system when excessive and undertake, and this is guarantee anchor cable branch
Protect a stable key factor.In the high stress underground engineering of deep, only by cable bolting often Lack of support, by mixed
Solidifying soil advantage of high quality and at a reasonable price, is changed to prefabricated assembled concrete arc plate, by both anchor cable and arc plate advantage group by cast-in-place concrete
Close, form high-strength compound prop.It should be guaranteed that this integer support system construction is simple, cost is reasonable simultaneously, with other branch
Protection structure contact supporting effect is good, and this is significant to solving deep-well tunnel supporting problem.
The content of the invention
Combined it is an object of the present invention to provide a kind of prefabricated assembled concrete arc plate with total space checkerboard type prestress anchorage cable
Into high-strength compound supporting construction, solves deep-well tunnel supporting problem, particularly by the tunnel of mining influence.Anchor cable belongs to actively
Supporting, deep wall rock can be given full play to from bearing capacity, meet New Austrian Tunneling Method principle, but total space concertedness difference supporting power is limited；Dress
Belong to passive protecting with formula arc plate, radial direction supporting power is high, but rigidity can not contract greatly and anti-dynamic pressure disturbance poor performance；Main passive combination
The high-strength contracting supporting construction of combination of rigidity and flexibility can be formed, is adapted to the supportings such as solution deep-well highland pressure and strong disturbance difficult.
The supporting construction of the specific present invention includes concrete arc plate, four-way pallet, steel wire rope and prestress anchorage cable；It is described mixed
Coagulate native arc plate and be circumferentially spliced into monocyclic concrete arc board mount, the monocyclic concrete arc board mount along longitudinal direction with it is another monocyclic
Concrete arc board mount connects as one；Described in the inside multistage of supporting construction steel wire rope respectively circumferentially with longitudinally connected formation
Checkerboard type steel wire rope Intranet；
The prestress anchorage cable mounting hole of more than 1 is offered on the concrete arc plate, the anchor cable passes through four-way pallet
Anchor cable hole and anchor cable mounting hole concrete arc plate and steel wire rope are fixed on country rock.
Further, in addition to pressed wood block is allowed, the concrete arc plate is circumferentially by allowing pressed wood block to splice；The pressure that allows
Wooden unit both sides offer pin-and-hole, and the concrete arc plate both sides open up ring connecting hole, the concrete arc plate and allow pressed wood block
It is fixedly connected by curved bolt；The concrete arc plate is further opened with longitudinally connected hole, and it passes through longitudinally connected hole and steel pin
It is longitudinally connected with another concrete arc plate.
Further, two sections of steel wire rope junctions of ring connection are respectively positioned on two sections of longitudinally connected steel wire rope junctions
The position of the four-way pallet, ring steel wire rope junction and longitudinal steel wire rope junction are fixed by four-way pallet and anchor cable
In on the inwall of concrete arc plate.
Further, the four-way pallet includes steel cable clamp and four pin pallets, is offered among the four pins pallet
Anchor cable hole, surrounding are welded and fixed four pins；Two sections of steel wire rope end heads of ring connection mutually stagger a certain distance, two sections of steel
Cord passes through steel cable clamp and another steel wirerope fastening in respective tip position respectively；Two sections of longitudinally connected steel wire rope end heads
Mutually stagger a certain distance, and two sections of steel wire ropes pass through steel cable clamp and another Steel wire rope lock in respective tip position respectively
Gu.
Further, the steel wire rope of two ring connections overlaps two-by-two with two longitudinally connected steel wire ropes, and is overlapping
Position passes through thin wire colligation component links, region of the link in four pins and outside anchor cable hole.
Further, another end of the stretching of four sections of steel wire ropes at the four-way pallet is threaded silk
Button, and be connected by internal screwed steel wire rope connector with the steel wire rope stretched out at another four-way pallet.
Further, the four pins pallet is square structure, has interior recessed area, the direction of the interior recessed area in center
Stretched out with the pin in opposite direction.
Further, the concrete arc plate includes internal more interspersed arc plate longitudinal direction joint bars.
The construction method of composite supporting construction is still further comprised,
The first step, roadway excavation shaping, carries out interim bolt-mesh-spurting supporting；
Second step, Multi-section concrete arc plate is assembled using fitting machine, forms closing branch retaining ring；
3rd step, construct anchor cable hole, prestressed anchor cable and four-way pallet, installs connector additional, applies to anchor cable and in advance should
Power, form total space checkerboard type prestressed anchor cable system；
4th step, after 5~10m of supporting, by the grouting behind shaft or drift lining hole on arc plate to the hole slip casting between country rock and arc plate, make
Composite supporting construction is in close contact with country rock, forms stable prop.
Above step is repeated, completes all prop installations.
Further, the section configuration of the supporting body structure is shallow bottom arch-shaped, flat ellipse, vertical ellipse or straight
Wall Semicircular arched.
The present invention at least has the advantages that：
(1) arc plate is prefabricated using mould, and uniform specification is quality controllable；
(2) 2 anchor cable holes are reserved with every block of arc plate, anchor cable squeezes into country rock by the hole, and anchor cable afterbody is anchored at four-way
On pallet.It can be anchored at immediately with anchor cable on country rock after the installation of arc plate in work progress, before ensure that arc plate closing cyclization
Stability；
(3) the prestressed anchor Cable Structure of checkerboard type makes tunneling boring anchor cable share load, reaches the collaboration supporting of total space anchor cable
Effect.And increase the effect of arc plate ring banding, give full play to arc plate compressive property；
(4) present invention can greatly enhance the integer support effect of prestress anchorage cable, prevent single anchor cable independent stressed and
Destroy, reach the effect that every anchor cable can share other anchor cable loads and itself load is effectively passed to other anchor cables；
(5) and in the composite support of prefabricated assembled concrete arc plate, by flexible supporting structure --- anchor cable and big rigidity
Supporting construction --- prefabricated assembled concrete arc plate matched well, combination of rigidity and flexibility support technology is formed, can effectively control deep-well
Roadway support deforms, and ensures stability of the roadway.
Brief description of the drawings
Fig. 1 is monocyclic composite supporting construction schematic diagram；
Fig. 2 is monocyclic composite supporting construction body plan；
Fig. 3 is composite supporting construction body overall schematic；
Fig. 4 is precast concrete arc plate schematic diagram；
Fig. 5 is checkerboard type prestressing anchor support arrangement schematic diagram；
Fig. 6 is checkerboard type prestress anchorage cable thin portion schematic diagram；
Fig. 7 is that section schematic diagram is buckled in steel wire rope braiding；
Fig. 8 is four-way pallet structural representation.
Main Reference Numerals explanation：
1- allows pressed wood block, 2- concrete arc plates, 3- arc plate hoisting rings, 4- arc plates longitudinal direction joint bar, 5- arc plate ring connecting holes,
6- four-way pallets, 7- steel wire ropes, 8- steel wire rope connectors, 9- tied silks, 10- steel cable clamps, 11- four-way pin disks, 12- anchor cables
Hole, 13- spacer pins, 14- anchorages, 15- prestress anchorage cables, 16- prestress anchorage cable mounting holes.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
In order that present disclosure is easier to be clearly understood, below according to specific embodiment and with reference to accompanying drawing to this
Invention is described in further detail.
As illustrated, the present invention includes concrete arc plate 2, four-way pallet 6, steel wire rope 7 and prestress anchorage cable 15；Concrete
Arc plate 2 is circumferentially spliced into monocyclic concrete arc board mount, referring to Fig. 1,2；Monocyclic concrete arc board mount along longitudinal direction with it is another
Monocyclic concrete arc board mount, which connects as one, forms supporting construction body, referring to Fig. 3；The inside multistage steel wire rope of supporting construction point
Checkerboard type steel wire rope Intranet circumferentially is not formed with longitudinally connected, referring to Fig. 3；
The prestress anchorage cable mounting hole 16 of more than 1 is offered on concrete arc plate 2, anchor cable passes through the anchor of four-way pallet 6
Concrete arc plate 2 and steel wire rope 7 are fixed on country rock by rope hole 12 and prestress anchorage cable mounting hole 16.
Concrete arc plate 2 is circumferentially by allowing pressed wood block 1 to splice；The both sides of pressed wood block 1 are allowed to offer pin-and-hole, concrete arc plate
2 both sides open up ring connecting hole, and concrete arc plate 2 is with allowing pressed wood block 1 to be fixedly connected by pin；Concrete arc plate 2 is further opened with
Longitudinally connected hole, it is longitudinally connected by longitudinally connected hole and pin and another concrete arc plate.
Two sections of steel wire rope junctions of ring connection are respectively positioned on the four-way with two sections of longitudinally connected steel wire rope junctions
The position of pallet 6, ring steel wire rope junction and longitudinal steel wire rope junction be fixed on by four-way pallet 6 and anchor cable 15 mixed
On 2 inwalls for coagulating native arc plate.
Four-way pallet includes steel cable clamp 10 and four and sells pallet 11, and anchor cable hole 12 is offered among four pin pallets 11, and four
It is welded and fixed four pins 13 week；Two sections of steel wire rope end heads of ring connection mutually stagger a certain distance, referring to Fig. 7, two sections
Steel wire rope passes through steel cable clamp 10 and another steel wirerope fastening in respective tip position respectively；Two sections of longitudinally connected steel wire ropes
Termination is mutually staggered a certain distance, and two sections of steel wire ropes pass through steel cable clamp 10 and another steel wire in respective tip position respectively
Cord lock is consolidated.
The steel wire rope of two ring connections overlaps two-by-two with two longitudinally connected steel wire ropes, referring to Fig. 7, and in overlap joint position
Put and component links, region of the link in four pins 13 and outside anchor cable hole 12 are bound by thin wire 9.
Another end of the stretching of four sections of steel wire ropes at four-way pallet 6 is threaded screw thread, referring to Fig. 7, and
It is connected by internal screwed steel wire rope connector 8 with the steel wire rope stretched out at another four-way pallet.
Four pin pallets are square structure, have interior recessed area in center, direction and the pin of the interior recessed area are stretched
Outgoing direction is on the contrary, referring to Fig. 8.
The concrete arc plate includes internal more interspersed arc plate longitudinal direction joint bars 4.
Specifically, the present invention includes 4~6 blocks of prefabricated assembled concrete arc plates 2 and allows the composition of pressed wood block 1 to close knot
Structure, prestress anchorage cable 15 enter country rock through arc plate anchor cable hole 16, are anchored on the inside of arc plate, and four woven by steel wire rope 7
Logical pallet 6 links together tunneling boring anchor cable, fills country rock and arc plate hole gap finally by grouting behind shaft or drift lining hole, it is pre- to form tunneling boring
The high-strength contracting supporting construction of assembled arc plate and checkerboard type prestress anchorage cable combination of rigidity and flexibility processed.Wherein, enclosed construction section can be with
It is the circular, shape of a hoof or ellipse, according to surrouding rock stress condition selecting；Single anchor cable stress can pass through steel wire rope when excessive will
Load passes to anchor cable around, load outside propagation successively as ripples in water, tunneling boring anchor cable is shared load, reaches complete
Spatial anchorage cable cooperates with supporting effect.Strength grade of concrete is generally C40,200~400mm of thickness, width 1000mm, length according to
Determined according to tunnel girth.Arc plate is prefabricated on ground, is transported to underground assembling, and generally use mechanical arm installation arc plate longitudinally uses bolt
Connection, ring are connected using software steel wire, reserve connecting hole；2 anchor cable holes 16 are reserved with every block of arc plate, anchor cable passes through the hole
Country rock is squeezed into, anchor cable afterbody is anchored on four-way pallet 6.Mechanical arm mounting hole is reserved with arc plate 2, for arc plate is fixed on
Install in equipment, to complete the lifting of arc plate, rotation and the action such as movable.
Specifically, it is as follows referring to Fig. 7, four-way pallet concrete structure：
Prestress anchorage cable uses the four-way pallet structure of waste steel wire rope braiding, and semi-circular is processed at steel wire rope both ends, and one
Big one is small, using steel wire winding, forms pulling buckle, and four-way pallet is formed with anchor cable pallet；Can be with when single anchor cable stress is excessive
4 anchor cables around are delivered load to by steel wire rope, 4 anchor cable stress of surrounding are excessive, can continue outwards to pass in addition
12 anchor cables, successively outwards, tunneling boring anchor cable is shared load, reach total space anchor cable collaboration supporting effect.And increase arc plate
Ring banding acts on, and gives full play to arc plate compressive property.Wherein braiding button section machines waste steel wire rope, foundation by pneumatic compacting
Arc plate relative dimensions determine rope capacity, and link is made in steel wire rope one end, and point big link and annelet, the other end is made similar
Screw thread, four steel wire ropes for suppressing link are put together, are fixed into a knot with tied silk 9, are then used wire line shoe again
Big-big link is fixedly connected by button 10 with small-link, is mixed four pin pallets 11, that is, is formed a four-way pallet.
Specifically, it is as follows referring to Fig. 1 and Fig. 2, combination of rigidity and flexibility prop detailed construction：
Monocyclic assembled arc harden structure is typically made up of 6 pieces of standard arc plates, is installed between adjacent arcs plate and is allowed pressed wood
Block, arc plate ring use curved bolt connection；Longitudinal direction is connected using joint bar mode, the pre- doweling in the exposed side of arc plate,
Installation opposite side is joint bar hole, and the joint bar connection of arc plate has been installed in the rear joint bar hole alignment for installing arc plate, to joint bar hole before connection
Interior note anchoring adhesive, ring is longitudinally connected to form overall assembled arc plate ring, can bear larger country rock radial load.
Arc plate ring belongs to passive protecting, is used in combination with the prestress anchorage cable of active support, by reserving anchor cable on arc plate
Hole is drilled, and reserved aperture is not less than 42mm, and 6~8m of anchor cable length, an arc plate ring uses 10~12 anchor cables, to realize anchor cable
Supporting is cooperateed with, anchor cable afterbody use four-way pallet, and checkerboard type, formation total space chessboard are connected into by waste steel wire rope between pallet
Formula prestressing anchor support system.
The contractibility of supporting construction is by allowing the compression of pressed wood block to realize, when arc plate ring bears larger load, in ring axle
The lower wooden unit meeting compression of power effect, arc plate ring can integrally reduce, and show as the reduction of arc plate ring diameter；With wooden unit same position
Steel wire rope is connector at middle part, and can accordingly tighten connector realization with wooden unit compression shortens steel wire rope purpose.
Specifically, it is as follows referring to Fig. 4, prefabricated assembled arc plate concrete structure：
Prefabricated assembled arc plate is divided into 6 calibrated bolcks, and specification is identical, the general 200~400mm of arc plate thickness, width
1000~1200mm, arrangement of reinforcement form reinforced concrete structure, and arc plate can use identical mechanization mould when processing, reduce mould
Processing and manufacturing difficulty and inventory.For tensile capacity on the inside of enhancing arc plate and make arc plate inner face and four-way pallet steel wire rope tight
Contiguity is touched, and will make one section of plane on the inside of arc plate.Arc plate is furnished with inside and outside two layers of reinforcing bar, arranges 3 diameters not less than 18mm's
Three-level reinforcing bar does ring principal rod, and three-level reinforcing bar of 3 diameters no more than 12mm does genesis analysis muscle.
Three kinds of connecting holes are set on arc plate：Anchor cable hole, ring connecting hole and longitudinally connected hole.Every block of arc plate sets 2 anchor cable holes,
It is arranged at arc plate arc length 1/4 and 3/4, positioned at the half section of arc plate width one, aperture is not less than 42mm；Ring connecting hole is to increase
Add monocyclic arc plate mass action, longitudinally connected hole is to increase the monocyclic mutual globality of arc plate.In addition, in the arc plate of top
Between position also need to set grouting behind shaft or drift lining hole, country rock and arc plate comprehensive engagement are made by slip casting.Transport and lift for convenience of arc plate, every
The pre-buried hoisting ring in block arc plate center.
Arc plate connector increase by 100~150mm height allows pressed wood block, and the branch retaining ring for forming arc plate, which has to contract, allows pressure
Function；Turn into branch retaining ring weak spot herein for prevention, do following technical measures：1. wooden unit is highly no more than arc plate thickness 1/3,
Utilize the friction power restriction wooden unit displacement of wooden unit and arc plate end face；2. wooden unit reserves connecting hole, it is easy to arc plate ring to connect steel wire
Sling passes through, and strengthens bonding strength using steel wire rope；3. the steel wire rope of checkerboard type distribution limits wooden unit to tunnel intrinsic displacement, in advance
Anti- tie point destroys.
Specifically, full face anchor cable is all linked together, can passes through steel when single anchor cable stress is excessive
Cord delivers load to 4 anchor cables around, and 4 anchor cable stress of surrounding are excessive, can continue outwards to pass to other 12 anchors
Rope, successively outwards, tunneling boring anchor cable is shared load, reach total space anchor cable collaboration supporting effect.
Also include composite supporting construction construction technology and installation process：
The installation of arc plate is completed using step-by-step movement monorail crane swivel mount device, and concrete technology is as follows：Arc plate transports in place, peace
The standby crawl bottom arc plate of installing is simultaneously installed in place, and stickup allows pressed wood block；Then left and right lower curved plate, ring connection are installed, then paste and allow
Pressed wood block；Hereafter arc plate in left and right is installed again, finally installation top arc plate, after being installed in place insertion allow pressed wood block, ring connection is complete
Closed-loop is formed into installation；Longitudinal joint bar connection of each block of arc plate is paid attention in installation process, is synchronously completed with being installed in place.
Checkerboard type prestress anchorage cable uses common bolt drill hole of drilling machine, first installs anchor cable, then installs four-way pallet, then
The four-way pallet of close anchor cable is connected with steel wire rope connector, ultimately forms total space checkerboard type prestressed anchor cable system.
By taking the composite supporting construction body of 6 pieces of standard arc plate compositions as an example, integral construction process is as follows：
The first step, roadway excavation shaping, carries out interim bolt-mesh-spurting supporting, the purpose of supporting is ensured in the construction space short time
It is stable；
Second step, the assembling of assembly concrete arc plate is completed using fitting machine, forms closing branch retaining ring；
3rd step, construct anchor cable hole, prestressed anchor cable and four-way pallet, installs connector additional, applies to anchor cable and in advance should
Power, form total space checkerboard type prestressed anchor cable system；
4th step, after 5~10m of supporting, by the grouting behind shaft or drift lining hole on arc plate to the hole slip casting between country rock and arc plate, make
Composite supporting construction is in close contact with country rock, forms stable prop.
Above step is repeated, completes all prop installations.If using heading and anchoring integrated machine in front of tunnelling, with arc plate
Special installing machine matches, and support speed will greatly improve.
According to the difference of the conditions such as tunnel buried depth, geological conditions, crustal stress and lithology, it is necessary to design different supporting construction
Body size, different checkerboard type cable bolting parameters and effective complex method between the two.Needed according to on-site actual situations true
Fixed major parameter has：Thickness, intensity and the curvature of arc plate, allow thickness, anchor cable model and the array pitch of pressed wood block.
Embodiments of the invention arc plate connector allows pressure mode, is not limited to wood compression and allows pressure or other materials
Expect (such as rubber) or can contracting formula metal structure etc., realize the compression in tunnel circumferencial direction, reach and allow pressure
Purpose；Digging machine, bottle gouard moved by hands or fully-mechanized digging machine rocking arm etc. can also be used in the installation of each section of arc plate.Prestress anchorage cable assembled arrangement side
Formula also makes oblique arrangement formula or spider web form etc. in addition to checkerboard type.
It is described above, only the preferred embodiment of the present invention, but protection scope of the present invention is not limited thereto, ability
Field technique personnel are not it should be understood that departing from principle and spirit of the invention that its scope is limited by claim and its equivalent
In the case of, these embodiments can be modified and perfect, these are changed and improved also should be in protection scope of the present invention
It is interior.
Claims (10)
- A kind of 1. assembled supporting construction of chessboard distribution anchor cable and concrete slab, it is characterised in that including concrete arc plate, Four-way pallet, steel wire rope and prestress anchorage cable；The concrete arc plate is circumferentially spliced into monocyclic concrete arc board mount, described Monocyclic concrete arc board mount connects as one along longitudinal direction with another monocyclic concrete arc board mount；The inside multistage of supporting construction The steel wire rope circumferentially forms checkerboard type steel wire rope Intranet with longitudinally connected respectively；The prestress anchorage cable mounting hole of more than 1 is offered on the concrete arc plate, the anchor cable passes through the anchor of four-way pallet Concrete arc plate and steel wire rope are fixed on country rock by rope hole and anchor cable mounting hole.
- 2. supporting construction as claimed in claim 1, it is characterised in that also include allowing pressed wood block, the concrete arc plate is along ring To by allowing pressed wood block to splice；Described to allow pressed wood block both sides to offer bolt hole, the concrete arc plate both sides open up ring company Hole is connect, the concrete arc plate is with allowing pressed wood block to be fixedly connected by curved bolt；The concrete arc plate is further opened with longitudinal direction Connecting hole, it is longitudinally connected by longitudinally connected hole and steel pin and another concrete arc plate.
- 3. supporting construction as claimed in claim 1, it is characterised in that two sections of steel wire rope junctions of ring connection connect with longitudinal direction The two sections of steel wire rope junctions connect are respectively positioned on the position of the four-way pallet, are connected ring steel wire rope by four-way pallet and anchor cable The place of connecing and longitudinal steel wire rope junction are fixed on the inwall of concrete arc plate.
- 4. supporting construction as claimed in claim 3, it is characterised in that the four-way pallet includes steel cable clamp and four pin supports Disk, it is described four pin pallet among offer anchor cable hole, surrounding is welded and fixed four pins；Two sections of steel wire rope end heads of ring connection Mutually stagger a certain distance, and two sections of steel wire ropes pass through steel cable clamp and another Steel wire rope lock in respective tip position respectively Gu；Two sections of longitudinally connected steel wire rope end heads mutually stagger a certain distance, and two sections of steel wire ropes lead in respective tip position respectively Cross steel cable clamp and another steel wirerope fastening.
- 5. supporting construction as claimed in claim 4, it is characterised in that the steel wire rope of two rings connection and two it is longitudinally connected Steel wire rope overlap two-by-two, and in lap position by thin wire colligation component links, the link in four pins and Region outside anchor cable hole.
- 6. supporting construction as claimed in claim 5, it is characterised in that the stretching of four sections of steel wire ropes at the four-way pallet Another end is threaded screw thread, and by internal screwed steel wire rope connector with being stretched at another four-way pallet The steel wire rope connection gone out, network structure is thusly-formed, optimal stress is that checkerboard type is netted, but is not limited to checkerboard type..
- 7. supporting construction as claimed in claim 4, it is characterised in that the four pins pallet is square structure, in center With interior recessed area, direction and the pin of the interior recessed area stretch out in the opposite direction.
- 8. composite supporting construction as claimed in claim 1, it is characterised in that the concrete arc plate interts more including inside Root arc plate longitudinal direction joint bar, there is the joint bar of exposure arc plate side, and opposite side is the steel pipe hole for joint bar insertion.
- It is 9. a kind of such as the construction method of any one of claim 1-8 supporting construction, it is characterised in thatThe first step, roadway excavation shaping, carries out interim bolt-mesh-spurting supporting；Second step, piece section concrete arc plate is assembled using fitting machine, forms closing branch retaining ring；3rd step, construct anchor cable hole, prestressed anchor cable and four-way pallet, installs connector additional, applies prestressing force, shape to anchor cable Into total space checkerboard type prestressed anchor cable system；4th step, after 5~10m of supporting, by the grouting behind shaft or drift lining hole on arc plate to the hole slip casting between country rock and arc plate, make compound Supporting construction is in close contact with country rock, forms stable prop.Above step is repeated, completes all prop installations.
- 10. composite supporting construction as claimed in claim 2, it is characterised in that the section configuration of the supporting body structure is Shallow bottom arch-shaped, flat ellipse, vertical ellipse or stalk Semicircular arched.
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| CN201711078243.7A CN107795322B (en) | 2017-11-06 | 2017-11-06 | Assembled concrete arc plate and chessboard type prestressed anchor cable composite supporting structure and construction method thereof |
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| CN201711078243.7A CN107795322B (en) | 2017-11-06 | 2017-11-06 | Assembled concrete arc plate and chessboard type prestressed anchor cable composite supporting structure and construction method thereof |
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| CN107795322B CN107795322B (en) | 2023-10-24 |
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| CN107795322B (en) | 2023-10-24 |
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