CN107227686A - A kind of tunnel-type anchorage pre-stress system locating support construction method - Google Patents
A kind of tunnel-type anchorage pre-stress system locating support construction method Download PDFInfo
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- CN107227686A CN107227686A CN201710356870.6A CN201710356870A CN107227686A CN 107227686 A CN107227686 A CN 107227686A CN 201710356870 A CN201710356870 A CN 201710356870A CN 107227686 A CN107227686 A CN 107227686A
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- locating support
- truss element
- tunnel
- steel plate
- steel
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
- E01D2101/32—Metal prestressed
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of tunnel-type anchorage pre-stress system locating support construction method, including：Locating support horse is made outside tunnel, then horse is assembled into split fix support steel truss, and roller is installed in truss bottom, prestress pipe is temporarily fixed on steel truss；Sliding rail is laid in tunnel inner bottom part, and steel truss segmentation is hung onto on sliding rail, is slowly transferred using winch；Steel truss is slid onto after design attitude, and roller is pulled down from steel truss, the sliding for next section truss；Adjustment and fixed steel truss and prestress pipe position.This method is by prestressing force locating support prefabricated construction, and process is simple, project progress is fast, substantially reduces the duration, saves construction cost, and economic benefit is fairly obvious.
Description
Technical field
The present invention is a kind of tunnel-type anchorage pre-stress system locating support construction method, and it is applied to the larger tunnel of buried depth
Road anchor, can meet the construction requirement for pre-stress system locating support in current building construction process.
Background technology
Due to the span ability and aesthetic property of suspension cable bridge, recent years China suspension bridge builds more and more, suspension bridge
Anchorage prestress anchoraging system construction is one of suspension bridge construction priority control content, how to accelerate applying for prestress anchoraging system
Work progress, the alignment quality for how ensuring prestress anchoraging system are the problem that construction person study all the time.
At present, the construction of domestic Techniques of Tunnel-Type Anchorage for Suspension Bridge prestressing force locating support is spliced prestressed fixed in tunnel
Operation faciostenosis in position support, but hole, support steel truss quality weight, big machinery is difficult to the normal operation in hole, difficulty of construction
Greatly, and pre-stress system requires high for construction precision, pre-stress system Construction precision control difficulty is big in hole.So now
Need construction method that is a kind of time saving and energy saving and being able to ensure that pre-stress system locating support precision.
The content of the invention
There is provided a kind of tunnel-type anchorage prestressing force locating support to solve technical problem present in known technology by the present invention
Construction method, both ensure that construction quality, efficiency of construction improved again, and saved construction cost.
The present invention is adopted the technical scheme that to solve technical problem present in known technology：
A kind of tunnel-type anchorage pre-stress system locating support construction method, comprises the following steps：
(1) locating support truss element is manufactured, described locating support truss element includes 2~3 locating support piece lists
Member, the locating support blade unit described in each includes many montants and whole montants that vertically parallel interval is set
Bottom on one wire, the montant is all made of I-shaped steel to do the supporting construction of locating support horse unit,
On described montant in the horizontal direction between the upper and lower every be welded with many cross bars, the cross bar positioned at bottommost and the horizontal stroke in bottommost
Cross bar above bar at 2~3 cross bar positions uses I-steel, and remaining cross bar uses channel-section steel, the cross bar that I-steel makes
Elongated on whole montants to set, the cross bar that channel-section steel makes is elongated alternatively up and down on whole montants to be set；Described in each
Cross bar on be welded with prestress pipe fixing steel plate according to the position of prestress pipe to be installed, in described prestressing force
Circular hole, described Circularhole diameter 2~3mm bigger than prestress pipe diameter are provided with pipeline location steel plate in the horizontal direction；It is described
The lateral error of pipeline location steel plate and design and installation position control in ± 2mm, be welded with the first company on each montant top
Steel plate is connect, the second junction steel plate is respectively welded in the cross bar left and right ends made of I-shaped steel, in each first connection
The corner location of steel plate and the second junction steel plate has bolt hole, will be due to hole in tunnel by the first junction steel plate
The montant of the locating support of limit for height connects height, by the second junction steel plate by cross bar with being connected in advance in the pre-buried good steel bracket of hole wall
Fixed, front and rear parallel interval is set and by being welded on each positioning branch each other between 2~3 described locating support blade units
Many longitudinal bar members at the cross bar intersection location that the montant of frame blade unit makes with I-steel are fixedly linked, each locating support piece
Interval error between unit is in ± 5mm；Longitudinally connected rod length on same group of locating support truss element is identical,
The rear and front end of each longitudinally connected rod member is respectively welded the 3rd junction steel plate, in each locating support truss element
The bottom of the left and right sides montant of most front-seat and most heel row locating support blade unit is separately installed with pulley, described pulley bag
The top junction steel plate for being bolted on montant bottom is included, a lower rollers are bolted on top junction steel plate
On to connect and to dismantle, be installed with the circular hole of the prestress pipe fixing steel plate of each locating support truss element it is pre- should
Power steel pipe and described pre-stressed steel pipe is temporarily fixed on locating support blade unit, before and after each pre-stressed steel pipe
Two ends are respectively welded ring flange, are easy to the connection between pre-stressed steel pipe；
(2) locating support truss is installed, concretely comprised the following steps：
(a) hoist engine is being set away from the segment distance of tunnel portal one, sliding rail support outside hole is set up at tunnel portal, and
The spacing of pulley outside hole on sliding rail support by locating support truss element lays two sliding rails；In tunnel floor
Sliding rail support in hole is installed, two sliding rails are extended in tunnel, supported with sliding rail support in hole；
(b) one group of locating support truss element is slowly hung onto on the sliding rail outside tunnel using crane, truss
Each piece cable wind rope of bolt on the corner location of bottom, adjusts truss element position, it is ensured that lower rollers by manual adjustment cable wind rope
Accurately it is put on sliding rail；
(c) after locating support truss element is hung onto on sliding rail by crane, by locating support truss element and volume
The steel wire rope connection drawn on machine is raised, then steel wire rope is tightened up, then loosens the suspension hook on locating support truss element, makes truss
Unit is smoothly put on sliding rail；
(d) slowly truss element is transferred along sliding rail using hoist engine, lowering velocity is no more than 0.1m/s, directly
To decentralization in place, truss element decentralization sets spacing to lower rollers afterwards in place, prevents from continuing to glide, while keeping at steel wire rope
In stress；
(e) truss element is finely adjusted using jack or guide chain in tunnel so that truss element position and design
Position is consistent, and then jack is put on the sliding rail below truss element, using jack jacking truss element, tears open
Unload lower rollers, prepare to be used for the sliding of next section of locating support truss element, pulley dismounting finish after by locating support truss list
Member be connected with tunnel inner support support and sliding rail, by the first junction steel plate in tunnel by due to the positioning of hole limit for height
The montant of support connects height, by cross bar with doing during hole wall liner block in hole wall liner block that pre-buried good steel bracket is connected by junction steel plate
It is fixed；
(f) next section of locating support truss element is installed in repeat step (b)~(e), decentralization, then will front and rear two sections of positioning
Support truss element is fixedly linked by the 3rd junction steel plate on longitudinally connected bar and will front and rear two sections of locating support truss
Prestress pipe on unit is connected using ring flange, and then the coordinate of the prestress pipe of front end is answered using total powerstation
Survey, after prestress pipe coordinate position reaches design requirement, prestress pipe is weldingly fixed on pipeline location steel plate.
(g) repeat step (f), makes whole truss transfer and install.
The present invention has advantages below：
(1) by prestressing force locating support prefabricated construction, process is simple, project progress is fast, substantially reduces the duration, saves
Construction cost, economic benefit is fairly obvious.
(2) steel construction workshop is processed, it is to avoid install that light is bad, place is limited, plant equipment can not used in tunnel
The problems such as, it is assembled convenient and reliable outside hole.
(3) operating risk in hole is shifted, assembled environment is good outside hole, and security risk is small, and the segmented integral slipping of truss is applied
Work technology maturation, security risk is controllable.
(4) locating support is in steel construction processing space standardized production, mark, and assembly precision is high, and hole is accurate before installing to be surveyed
Amount, prestress pipe positioning precision is high.
(5) tunnel-type anchorage pre-stress system locating support construction success, it is similar after being in the case of construction carry
Reliable decision-making foundation and technical indicator are supplied.
Brief description of the drawings
Fig. 1 is prestressing force locating support blade unit structural representation；
Fig. 2 is prestressing force locating support truss unit structure schematic diagram；
Fig. 3 is that prestressing force locating support truss transfers schematic diagram；
Fig. 4 is the pulley schematic diagram figure on dismounting truss；
Fig. 5 is pulley structure schematic diagram；
Fig. 6 is junction steel plate structural representation.
Embodiment
In order to be able to further appreciate that the invention, features and effects of the present invention, Fig. 1~Fig. 6, a kind of tunnel type are referred to
Anchorage pre-stress system locating support construction method, comprises the following steps：
(1) locating support truss element is manufactured, described locating support truss element includes 2~3 locating support piece lists
Member, the locating support blade unit described in each includes many montants 1 that vertically parallel interval is set and all erected
On one wire, the montant 1 is all made of I-shaped steel to do the supporting construction of locating support horse unit for the bottom of bar,
On described montant 1 in the horizontal direction between the upper and lower every be welded with many cross bars 2, positioned at the cross bar 2 of bottommost and at most bottom
Cross bar 2 of the top of cross bar 2 in portion at 2~3 positions of cross bar 2 uses I-steel, and remaining cross bar 2 uses channel-section steel, I-steel
The cross bar 2 of making is elongated on whole montants 1 to be set, and the cross bar 2 that channel-section steel makes is elongated alternatively up and down on whole montants 1 to be set
Put, so both can guarantee that locating support blade unit firm stable, horse unit weight, convenient lifting are alleviated again；At each
Prestress pipe fixing steel plate 4 is welded with according to the position of prestress pipe to be installed on described cross bar 2, described
It is provided with circular hole 5 on prestress pipe fixing steel plate 4 in the horizontal direction, the described diameter of circular hole 5 is bigger than prestress pipe diameter by 2~
3mm；Described pipeline location steel plate 4 and the lateral error of design and installation position are controlled in ± 2mm, in the weldering of each top of montant 1
The first junction steel plate 3-1 is connected to, the second junction steel plate 3-2 is respectively welded in the left and right ends of cross bar 2 made of I-shaped steel,
Each first junction steel plate 3-1 and the second junction steel plate 3-2 corner location has bolt hole.Pass through the first connection
Montant 1 due to the locating support of hole limit for height is connect height by steel plate 3-1 in tunnel, by the second junction steel plate 3-2 by cross bar 2
With being connected in advance in the pre-buried good steel bracket of hole wall.It is front and rear parallel each other between 2~3 described locating support blade units
It is arranged at intervals and many at the cross bar intersection location that the montant of each locating support blade unit makes with I-steel by being welded on
Root longitudinal bar member 6 is fixedly linked, and the interval error between each locating support blade unit is in ± 5mm；Same group of locating support purlin
The length of longitudinally connected rod member 6 on frame unit is identical, and the 3rd is respectively welded in the rear and front end of each longitudinally connected rod member 6
Junction steel plate 3-3, it is to be connected in tunnel with remaining truss element that it, which is acted on,.It is preferred that one locating support truss element of composition
Locating support blade unit between with Bolted angle connection as supplement truss monolithic stability connection be 8, described longitudinally connected bar
Part 6 uses I-steel, as making the structure of locating support truss element monolithic stability.In each locating support truss element
The bottom of the left and right sides montant 1 of most front-seat and most heel row locating support blade unit is separately installed with pulley 7, described pulley
7 include being bolted on the top junction steel plate 16 of the bottom of montant 1, and a lower rollers 17 are bolted on top
To connect and to dismantle on junction steel plate 16, in the circle of the prestress pipe fixing steel plate 4 of each locating support truss element
Pre-stressed steel pipe is installed with hole 5 and described pre-stressed steel pipe is temporarily fixed on locating support blade unit, it is pre- at each
The rear and front end of stress steel pipe is respectively welded ring flange, is easy to the connection between pre-stressed steel pipe, reduces welding job in tunnel.
(2) locating support truss is installed, concretely comprised the following steps：
(a) hoist engine 11 is being set away from the segment distance of tunnel portal one, sliding rail branch outside hole is set up at the hole of tunnel 12
Frame 10, and the spacing of the pulley 7 outside hole on sliding rail support 10 by locating support truss element lays two sliding rails
9；Sliding rail support 15 in hole is installed in the bottom of tunnel 12, two sliding rails 9 are extended in tunnel 12, is slid with hole
Track support 15 is supported.
The bottom mounting bracket 15 of tunnel 12 supports and rail is slid in sliding rail, hole as sliding rail support 10 outside hole
Road support 15 is only laid below two sliding rails, is only used as supporting two sliding rails, it is not necessary to all lay in hole；
(b) one group of locating support truss element is slowly hung onto using crane on the sliding rail 9 outside tunnel 12, purlin
Each piece cable wind rope of bolt on the corner location of frame bottom, truss element position is adjusted by manual adjustment cable wind rope, it is ensured that rolled bottom
Wheel 17 is accurately put on sliding rail 9；
(c) after locating support truss element is hung onto on sliding rail 9 by crane, by locating support truss element and volume
Raise the steel wire rope 13 drawn on machine 11 to connect, then tighten up steel wire rope 13, then loosen the suspension hook on locating support truss element,
Truss element is set smoothly to be put on sliding rail 9；
(d) slowly truss element is transferred along sliding rail 9 using hoist engine 11, lowering velocity is no more than 0.1m/
S, until decentralization is in place, truss element decentralization sets spacing to lower rollers 17 afterwards in place, prevents from continuing to glide, while keeping steel
Cord 13 is in stress.
(e) truss element is finely adjusted using jack or guide chain in tunnel 12 so that truss element position is with setting
Meter position is consistent.Then jack 14 is put on the sliding rail 9 below truss element, utilizes the jacking truss of jack 14
Unit, dismantles lower rollers 17, prepares to be used for next section of locating support truss element sliding.The dismounting of pulley 7 will positioning after finishing
Support truss element is connected with the inner support support 15 of tunnel 12 and sliding rail 9.Will in tunnel by the first junction steel plate 3-1
Because the montant 1 of the locating support of hole limit for height connects height, by cross bar 2 and when doing hole wall liner block in hole wall liner block pre-buried good steel
Support is connected by junction steel plate 3-2.
(f) next section of locating support truss element is installed in repeat step (b)~(e), decentralization, then will front and rear two sections of positioning
Support truss element is fixedly linked by the 3rd junction steel plate 3-3 on longitudinally connected bar 6 and will front and rear two sections of locating support
Prestress pipe on truss element is connected using ring flange, then utilizes coordinate of the total powerstation to the prestress pipe 7 of front end
Repetition measurement is carried out, after prestress pipe coordinate position reaches design requirement, prestress pipe is weldingly fixed on pipeline location steel
On plate 4.
(g) repeat step (f), makes whole truss elements transfer and install.
Depending on the device actual size of the present invention is with job site actual conditions.
The present invention can adapt to the larger tunnel anchorage pre-stress system locating support construction of buried depth, it is ensured that prestress pipe exists
Axis direction, locus on locating support etc. meet design requirement, while the device disclosure satisfy that prestress pipe mixed
Being accurately positioned during solidifying soil pouring construction, with simple in construction, operates flexibly, operation is convenient and swift, and using effect is good, applies
Work speed is fast, the advantages of efficiency high and construction safety hidden danger are lacked, and can effectively shorten the duration and ensure construction safety, for
Same type construction can be as consulting and using.
Embodiment 1
(1) locating support truss element is manufactured, described locating support truss element includes 3 locating support blade units,
Locating support blade unit described in each includes many montants 1 that vertically parallel interval is set and all montant
On one wire, the montant 1 is all made to do the supporting construction of locating support horse unit, in institute of I-shaped steel for bottom
On the montant 1 stated in the horizontal direction between the upper and lower every be welded with many cross bars 2, positioned at the cross bar 2 of bottommost and in bottommost
Cross bar 2 of the top of cross bar 2 at 2 positions of cross bar 2 uses I-steel, and remaining cross bar 2 uses channel-section steel, the horizontal stroke that I-steel makes
Bar 2 is elongated on whole montants 1 to be set, and the cross bar 2 that channel-section steel makes is elongated alternatively up and down on whole montants 1 to be set, so both
Locating support blade unit firm stable is can guarantee that, horse unit weight, convenient lifting are alleviated again；In the cross bar described in each
Prestress pipe fixing steel plate 4 is welded with according to the position of prestress pipe to be installed on 2, in described prestress pipe
Circular hole 5, the described diameter of circular hole 5 2mm bigger than prestress pipe diameter are provided with fixing steel plate 4 in the horizontal direction；Described pipe
Road fixing steel plate 4 and the lateral error of design and installation position are controlled in 2mm, and the first connection steel is welded with each top of montant 1
Plate 3-1, the second junction steel plate 3-2 is respectively welded in the left and right ends of cross bar 2 made of I-shaped steel, is connected each described first
The corner location for meeting steel plate 3-1 and the second junction steel plate 3-2 has bolt hole.By the first junction steel plate 3-1 in tunnel
It is interior that the montant 1 due to the locating support of hole limit for height is connect into height, by the second junction steel plate 3-2 by cross bar 2 and in advance in Dong Bi
Pre-buried good steel bracket is connected.Front and rear parallel interval sets and led to each other between 3 described locating support blade units
Many longitudinal bar members 6 being welded at the cross bar intersection location that the montant of each locating support blade unit makes with I-steel are crossed to fix
It is connected, the interval error between each locating support blade unit is in 5mm；It is longitudinally connected on same group of locating support truss element
The length of rod member 6 is identical, and the 3rd junction steel plate 3-3 is respectively welded in the rear and front end of each longitudinally connected rod member 6, and it is acted on
It is to be connected in tunnel with remaining truss element.Angle is used between the locating support blade unit for constituting a locating support truss element
Steel connection is 8 as the connection of supplement truss monolithic stability, and described longitudinally connected rod member 6 uses I-steel, as making positioning
The structure of support truss element monolithic stability.In most front-seat and most heel row the locating support of each locating support truss element
The bottom of the left and right sides montant 1 of blade unit is separately installed with pulley 7, and described pulley 7 includes being bolted on montant 1
The top junction steel plate 16 of bottom a, lower rollers 17 are bolted on top junction steel plate 16 to connect and tear open
Unload, pre-stressed steel pipe and institute are installed with the circular hole 5 of the prestress pipe fixing steel plate 4 of each locating support truss element
The pre-stressed steel pipe stated is temporarily fixed on locating support blade unit, is respectively welded in the rear and front end of each pre-stressed steel pipe
There is ring flange, be easy to the connection between pre-stressed steel pipe, reduce welding job in tunnel.
(2) locating support truss is installed, concretely comprised the following steps：
(a) hoist engine 11 is being set away from the segment distance of tunnel portal one, sliding rail branch outside hole is set up at the hole of tunnel 12
Frame 10, and the spacing of the pulley 7 outside hole on sliding rail support 10 by locating support truss element lays two sliding rails
9；Sliding rail support 15 in hole is installed in the bottom of tunnel 12, two sliding rails 9 are extended in tunnel 12, is slid with hole
Track support 15 is supported.
The bottom mounting bracket 15 of tunnel 12 supports and rail is slid in sliding rail, hole as sliding rail support 10 outside hole
Road support 15 is only laid below two sliding rails, is only used as supporting two sliding rails, it is not necessary to all lay in hole；
(b) one group of locating support truss element is slowly hung onto using crane on the sliding rail 9 outside tunnel 12, purlin
Each piece cable wind rope of bolt on the corner location of frame bottom, truss element position is adjusted by manual adjustment cable wind rope, it is ensured that rolled bottom
Wheel 17 is accurately put on sliding rail 9；
(c) after locating support truss element is hung onto on sliding rail 9 by crane, by locating support truss element and volume
Raise the steel wire rope 13 drawn on machine 11 to connect, then tighten up steel wire rope 13, then loosen the suspension hook on locating support truss element,
Truss element is set smoothly to be put on sliding rail 9；
(d) slowly truss element is transferred along sliding rail 9 using hoist engine 11, lowering velocity is no more than 0.1m/
S, until decentralization is in place, truss element decentralization sets spacing to lower rollers 17 afterwards in place, prevents from continuing to glide, while keeping steel
Cord 13 is in stress.
(e) truss element is finely adjusted using jack or guide chain in tunnel 12 so that truss element position is with setting
Meter position is consistent.Then jack 14 is put on the sliding rail 9 below truss element, utilizes the jacking truss of jack 14
Unit, dismantles lower rollers 17, prepares to be used for next section of locating support truss element sliding.The dismounting of pulley 7 will positioning after finishing
Support truss element is connected with the inner support support 15 of tunnel 12 and sliding rail 9.Will in tunnel by the first junction steel plate 3-1
Because the montant 1 of the locating support of hole limit for height connects height, by cross bar 2 and when doing hole wall liner block in hole wall liner block pre-buried good steel
Support is connected by junction steel plate 3-2.
(f) next section of locating support truss element is installed in repeat step (b)~(e), decentralization, then will front and rear two sections of positioning
Support truss element is fixedly linked by the 3rd junction steel plate 3-3 on longitudinally connected bar 6 and will front and rear two sections of locating support
Prestress pipe on truss element is connected using ring flange, then utilizes coordinate of the total powerstation to the prestress pipe 7 of front end
Repetition measurement is carried out, after prestress pipe coordinate position reaches design requirement, prestress pipe is weldingly fixed on pipeline location steel
On plate 4.
(g) repeat step (f), makes whole truss elements transfer and install.
Through experiment, greatly speeded up using this method construction speed, 1.5 months durations are saved, so as to greatly save construction
Cost.Smooth steel construction processing place makes outside hole, reduces operating risk, it is ensured that locating support integral rigidity, stably
Property and prestress pipe positioning precision.
Embodiment 2
(1) locating support truss element is manufactured, described locating support truss element includes 2 locating support blade units,
Locating support blade unit described in each includes many montants 1 that vertically parallel interval is set and all montant
On one wire, the montant 1 is all made to do the supporting construction of locating support horse unit, in institute of I-shaped steel for bottom
On the montant 1 stated in the horizontal direction between the upper and lower every be welded with many cross bars 2, positioned at the cross bar 2 of bottommost and in bottommost
Cross bar 2 of the top of cross bar 2 at 3 positions of cross bar 2 uses I-steel, and remaining cross bar 2 uses channel-section steel, the horizontal stroke that I-steel makes
Bar 2 is elongated on whole montants 1 to be set, and the cross bar 2 that channel-section steel makes is elongated alternatively up and down on whole montants 1 to be set, so both
Locating support blade unit firm stable is can guarantee that, horse unit weight, convenient lifting are alleviated again；In the cross bar described in each
Prestress pipe fixing steel plate 4 is welded with according to the position of prestress pipe to be installed on 2, in described prestress pipe
Circular hole 5, the described diameter of circular hole 5 2.5mm bigger than prestress pipe diameter are provided with fixing steel plate 4 in the horizontal direction；Described
Pipeline location steel plate 4 and the lateral error of design and installation position are controlled in 1mm, and the first connection is welded with each top of montant 1
Steel plate 3-1, is respectively welded the second junction steel plate 3-2, each described first in the left and right ends of cross bar 2 made of I-shaped steel
Junction steel plate 3-1 and the second junction steel plate 3-2 corner location have bolt hole.By the first junction steel plate 3-1 in tunnel
The montant 1 due to the locating support of hole limit for height is connect into height in hole, by the second junction steel plate 3-2 by cross bar 2 and in advance in hole
The pre-buried good steel bracket of wall is connected.Between 2 described locating support blade units each other front and rear parallel interval set and
Consolidated by being welded on many longitudinal bar members 6 at the cross bar intersection location that the montant of each locating support blade unit makes with I-steel
Fixed to be connected, the interval error between each locating support blade unit is in 2mm；Longitudinal direction on same group of locating support truss element connects
The length of extension bar part 6 is identical, and the 3rd junction steel plate 3-3 is respectively welded in the rear and front end of each longitudinally connected rod member 6, and it is made
With being to be connected in tunnel with remaining truss element.Used between the locating support blade unit for constituting a locating support truss element
Bolted angle connection is 8 as the connection of supplement truss monolithic stability, and described longitudinally connected rod member 6 uses I-steel, fixed as making
The structure of position support truss element monolithic stability.In most front-seat and most heel row the positioning branch of each locating support truss element
The bottom of the left and right sides montant 1 of frame blade unit is separately installed with pulley 7, and described pulley 7 is perpendicular including being bolted on
The top junction steel plate 16 of the bottom of bar 1 a, lower rollers 17 are bolted on top junction steel plate 16 to connect
And dismounting, it is installed with pre-stressed steel pipe simultaneously in the circular hole 5 of the prestress pipe fixing steel plate 4 of each locating support truss element
And described pre-stressed steel pipe is temporarily fixed on locating support blade unit, in the rear and front end difference of each pre-stressed steel pipe
Ring flange is welded with, is easy to the connection between pre-stressed steel pipe, welding job in tunnel is reduced.
(2) locating support truss is installed, concretely comprised the following steps：
(a) hoist engine 11 is being set away from the segment distance of tunnel portal one, sliding rail branch outside hole is set up at the hole of tunnel 12
Frame 10, and the spacing of the pulley 7 outside hole on sliding rail support 10 by locating support truss element lays two sliding rails
9；Sliding rail support 15 in hole is installed in the bottom of tunnel 12, two sliding rails 9 are extended in tunnel 12, is slid with hole
Track support 15 is supported.
The bottom mounting bracket 15 of tunnel 12 supports and rail is slid in sliding rail, hole as sliding rail support 10 outside hole
Road support 15 is only laid below two sliding rails, is only used as supporting two sliding rails, it is not necessary to all lay in hole；
(b) one group of locating support truss element is slowly hung onto using crane on the sliding rail 9 outside tunnel 12, purlin
Each piece cable wind rope of bolt on the corner location of frame bottom, truss element position is adjusted by manual adjustment cable wind rope, it is ensured that rolled bottom
Wheel 17 is accurately put on sliding rail 9；
(c) after locating support truss element is hung onto on sliding rail 9 by crane, by locating support truss element and volume
Raise the steel wire rope 13 drawn on machine 11 to connect, then tighten up steel wire rope 13, then loosen the suspension hook on locating support truss element,
Truss element is set smoothly to be put on sliding rail 9；
(d) slowly truss element is transferred along sliding rail 9 using hoist engine 11, lowering velocity is no more than 0.1m/
S, until decentralization is in place, truss element decentralization sets spacing to lower rollers 17 afterwards in place, prevents from continuing to glide, while keeping steel
Cord 13 is in stress.
(e) truss element is finely adjusted using jack or guide chain in tunnel 12 so that truss element position is with setting
Meter position is consistent.Then jack 14 is put on the sliding rail 9 below truss element, utilizes the jacking truss of jack 14
Unit, dismantles lower rollers 17, prepares to be used for next section of locating support truss element sliding.The dismounting of pulley 7 will positioning after finishing
Support truss element is connected with the inner support support 15 of tunnel 12 and sliding rail 9.Will in tunnel by the first junction steel plate 3-1
Because the montant 1 of the locating support of hole limit for height connects height, by cross bar 2 and when doing hole wall liner block in hole wall liner block pre-buried good steel
Support is connected by junction steel plate 3-2.
(f) next section of locating support truss element is installed in repeat step (b)~(e), decentralization, then will front and rear two sections of positioning
Support truss element is fixedly linked by the 3rd junction steel plate 3-3 on longitudinally connected bar 6 and will front and rear two sections of locating support
Prestress pipe on truss element is connected using ring flange, then utilizes coordinate of the total powerstation to the prestress pipe 7 of front end
Repetition measurement is carried out, after prestress pipe coordinate position reaches design requirement, prestress pipe is weldingly fixed on pipeline location steel
On plate 4.
(g) repeat step (f), makes whole truss elements transfer and install.
Through experiment, greatly speeded up using this method construction speed, 1.5 months durations are saved, so as to greatly save construction
Cost.Smooth steel construction processing place makes outside hole, reduces operating risk, it is ensured that locating support integral rigidity, stably
Property and prestress pipe positioning precision.
Embodiment 3
(1) locating support truss element is manufactured, described locating support truss element includes 3 locating support blade units,
Locating support blade unit described in each includes many montants 1 that vertically parallel interval is set and all montant
On one wire, the montant 1 is all made to do the supporting construction of locating support horse unit, in institute of I-shaped steel for bottom
On the montant 1 stated in the horizontal direction between the upper and lower every be welded with many cross bars 2, positioned at the cross bar 2 of bottommost and in bottommost
Cross bar 2 of the top of cross bar 2 at 2 positions of cross bar 2 uses I-steel, and remaining cross bar 2 uses channel-section steel, the horizontal stroke that I-steel makes
Bar 2 is elongated on whole montants 1 to be set, and the cross bar 2 that channel-section steel makes is elongated alternatively up and down on whole montants 1 to be set, so both
Locating support blade unit firm stable is can guarantee that, horse unit weight, convenient lifting are alleviated again；In the cross bar described in each
Prestress pipe fixing steel plate 4 is welded with according to the position of prestress pipe to be installed on 2, in described prestress pipe
Circular hole 5, the described diameter of circular hole 5 3mm bigger than prestress pipe diameter are provided with fixing steel plate 4 in the horizontal direction；Described pipe
Road fixing steel plate 4 and the lateral error of design and installation position are controlled in -2mm, and the first connection steel is welded with each top of montant 1
Plate 3-1, the second junction steel plate 3-2 is respectively welded in the left and right ends of cross bar 2 made of I-shaped steel, is connected each described first
The corner location for meeting steel plate 3-1 and the second junction steel plate 3-2 has bolt hole.By the first junction steel plate 3-1 in tunnel
It is interior that the montant 1 due to the locating support of hole limit for height is connect into height, by the second junction steel plate 3-2 by cross bar 2 and in advance in Dong Bi
Pre-buried good steel bracket is connected.Front and rear parallel interval sets and led to each other between 3 described locating support blade units
Many longitudinal bar members 6 being welded at the cross bar intersection location that the montant of each locating support blade unit makes with I-steel are crossed to fix
It is connected, the interval error between each locating support blade unit is in -5mm；Longitudinal direction on same group of locating support truss element connects
The length of extension bar part 6 is identical, and the 3rd junction steel plate 3-3 is respectively welded in the rear and front end of each longitudinally connected rod member 6, and it is made
With being to be connected in tunnel with remaining truss element.Used between the locating support blade unit for constituting a locating support truss element
Bolted angle connection is 8 as the connection of supplement truss monolithic stability, and described longitudinally connected rod member 6 uses I-steel, fixed as making
The structure of position support truss element monolithic stability.In most front-seat and most heel row the positioning branch of each locating support truss element
The bottom of the left and right sides montant 1 of frame blade unit is separately installed with pulley 7, and described pulley 7 is perpendicular including being bolted on
The top junction steel plate 16 of the bottom of bar 1 a, lower rollers 17 are bolted on top junction steel plate 16 to connect
And dismounting, it is installed with pre-stressed steel pipe simultaneously in the circular hole 5 of the prestress pipe fixing steel plate 4 of each locating support truss element
And described pre-stressed steel pipe is temporarily fixed on locating support blade unit, in the rear and front end difference of each pre-stressed steel pipe
Ring flange is welded with, is easy to the connection between pre-stressed steel pipe, welding job in tunnel is reduced.
(2) locating support truss is installed, concretely comprised the following steps：
(a) hoist engine 11 is being set away from the segment distance of tunnel portal one, sliding rail branch outside hole is set up at the hole of tunnel 12
Frame 10, and the spacing of the pulley 7 outside hole on sliding rail support 10 by locating support truss element lays two sliding rails
9；Sliding rail support 15 in hole is installed in the bottom of tunnel 12, two sliding rails 9 are extended in tunnel 12, is slid with hole
Track support 15 is supported.
The bottom mounting bracket 15 of tunnel 12 supports and rail is slid in sliding rail, hole as sliding rail support 10 outside hole
Road support 15 is only laid below two sliding rails, is only used as supporting two sliding rails, it is not necessary to all lay in hole；
(b) one group of locating support truss element is slowly hung onto using crane on the sliding rail 9 outside tunnel 12, purlin
Each piece cable wind rope of bolt on the corner location of frame bottom, truss element position is adjusted by manual adjustment cable wind rope, it is ensured that rolled bottom
Wheel 17 is accurately put on sliding rail 9；
(c) after locating support truss element is hung onto on sliding rail 9 by crane, by locating support truss element and volume
Raise the steel wire rope 13 drawn on machine 11 to connect, then tighten up steel wire rope 13, then loosen the suspension hook on locating support truss element,
Truss element is set smoothly to be put on sliding rail 9；
(d) slowly truss element is transferred along sliding rail 9 using hoist engine 11, lowering velocity is no more than 0.1m/
S, until decentralization is in place, truss element decentralization sets spacing to lower rollers 17 afterwards in place, prevents from continuing to glide, while keeping steel
Cord 13 is in stress.
(e) truss element is finely adjusted using jack or guide chain in tunnel 12 so that truss element position is with setting
Meter position is consistent.Then jack 14 is put on the sliding rail 9 below truss element, utilizes the jacking truss of jack 14
Unit, dismantles lower rollers 17, prepares to be used for next section of locating support truss element sliding.The dismounting of pulley 7 will positioning after finishing
Support truss element is connected with the inner support support 15 of tunnel 12 and sliding rail 9.Will in tunnel by the first junction steel plate 3-1
Because the montant 1 of the locating support of hole limit for height connects height, by cross bar 2 and when doing hole wall liner block in hole wall liner block pre-buried good steel
Support is connected by junction steel plate 3-2.
(f) next section of locating support truss element is installed in repeat step (b)~(e), decentralization, then will front and rear two sections of positioning
Support truss element is fixedly linked by the 3rd junction steel plate 3-3 on longitudinally connected bar 6 and will front and rear two sections of locating support
Prestress pipe on truss element is connected using ring flange, then utilizes coordinate of the total powerstation to the prestress pipe 7 of front end
Repetition measurement is carried out, after prestress pipe coordinate position reaches design requirement, prestress pipe is weldingly fixed on pipeline location steel
On plate 4.
(g) repeat step (f), makes whole truss elements transfer and install.
Through experiment, greatly speeded up using this method construction speed, 1.5 months durations are saved, so as to greatly save construction
Cost.Smooth steel construction processing place makes outside hole, reduces operating risk, it is ensured that locating support integral rigidity, stably
Property and prestress pipe positioning precision.
The invention is not limited in above-mentioned embodiment, above-mentioned embodiment be only it is schematical,
It is not restricted, one of ordinary skill in the art is not departing from present inventive concept and right under the enlightenment of the present invention
It is required that under the ambit protected, can also make many forms, these are belonged within protection scope of the present invention.
Claims (3)
1. a kind of tunnel-type anchorage pre-stress system locating support construction method, it is characterised in that comprise the following steps：
(1) locating support truss element is manufactured, described locating support truss element includes 2~3 locating support blade units, often
Locating support blade unit described in one includes the bottom of many montants that vertically parallel interval is set and whole montants
On one wire, the montant is all made to do the supporting construction of locating support horse unit, described of I-shaped steel in portion
Montant in the horizontal direction between the upper and lower every be welded with many cross bars, the cross bar positioned at bottommost and the cross bar in bottommost
Cross bar of the side at 2~3 cross bar positions uses I-steel, and remaining cross bar uses channel-section steel, and the cross bar that I-steel makes is complete
Elongated on portion's montant to set, the cross bar that channel-section steel makes is elongated alternatively up and down on whole montants to be set；In the horizontal stroke described in each
Prestress pipe fixing steel plate is welded with according to the position of prestress pipe to be installed on bar, in described prestress pipe
Circular hole, described Circularhole diameter 2~3mm bigger than prestress pipe diameter are provided with fixing steel plate in the horizontal direction；Described pipe
Road fixing steel plate and the lateral error of design and installation position are controlled in ± 2mm, and the first connection steel is welded with each montant top
Plate, the second junction steel plate is respectively welded in the cross bar left and right ends made of I-shaped steel, in each first junction steel plate
Bolt hole is had with the corner location of the second junction steel plate, will be due to hole limit for height in tunnel by the first junction steel plate
The montant of locating support connect height, cross bar is consolidated be connected in advance in hole wall pre-buried good steel bracket by the second junction steel plate
Fixed, front and rear parallel interval is set and by being welded on each locating support each other between 2~3 described locating support blade units
Many longitudinal bar members at the cross bar intersection location that the montant of blade unit makes with I-steel are fixedly linked, each locating support piece list
Interval error between member is in ± 5mm；Longitudinally connected rod length on same group of locating support truss element is identical, every
The rear and front end of a piece longitudinally connected rod member is respectively welded the 3rd junction steel plate, in each locating support truss element most
The bottom of the left and right sides montant of the locating support blade unit of front-seat and most heel row is separately installed with pulley, and described pulley includes
The top junction steel plate of montant bottom is bolted on, a lower rollers are bolted on the junction steel plate of top
To connect and to dismantle, prestressing force is installed with the circular hole of the prestress pipe fixing steel plate of each locating support truss element
Steel pipe and described pre-stressed steel pipe is temporarily fixed on locating support blade unit, two before and after each pre-stressed steel pipe
End is respectively welded ring flange, is easy to the connection between pre-stressed steel pipe；
(2) locating support truss is installed, concretely comprised the following steps：
(a) hoist engine is being set away from the segment distance of tunnel portal one, sliding rail support outside hole is set up at tunnel portal, and in hole
The spacing of pulley on outer sliding rail support by locating support truss element lays two sliding rails；Installed in tunnel floor
Sliding rail support in hole, two sliding rails are extended in tunnel, are supported with sliding rail support in hole；
(b) one group of locating support truss element is slowly hung onto on the sliding rail outside tunnel using crane, truss bottom
Each piece cable wind rope of bolt on corner location, adjusts truss element position, it is ensured that lower rollers are accurate by manual adjustment cable wind rope
Be put on sliding rail；
(c) after locating support truss element is hung onto on sliding rail by crane, by locating support truss element and hoist engine
The steel wire rope connection of upper extraction, then tightens up steel wire rope, then loosens the suspension hook on locating support truss element, makes truss element
Smoothly it is put on sliding rail；
(d) slowly truss element is transferred along sliding rail using hoist engine, lowering velocity is no more than 0.1m/s, until under
Be put into position, truss element decentralization sets spacing to lower rollers afterwards in place, prevent from continuing to glide, at the same keep steel wire rope be in by
Power state；
(e) truss element is finely adjusted using jack or guide chain in tunnel so that truss element position and design attitude
It is consistent, then jack is put on the sliding rail below truss element, using jack jacking truss element, under dismounting
Portion's roller, prepares to be used for the sliding of next section of locating support truss element, pulley dismounting finish after by locating support truss element with
Tunnel inner support support is connected with sliding rail, by the first junction steel plate in tunnel by due to the locating support of hole limit for height
Montant connect height, cross bar is consolidated with making during hole wall liner block the pre-buried good steel bracket in hole wall liner block and be connected by junction steel plate
It is fixed；
(f) next section of locating support truss element is installed in repeat step (b)~(e), decentralization, then will front and rear two sections of locating supports
Truss element is fixedly linked by the 3rd junction steel plate on longitudinally connected bar and will front and rear two sections of locating support truss element
On prestress pipe connected using ring flange, then using total powerstation to the coordinate of the prestress pipe of front end progress repetition measurement,
After prestress pipe coordinate position reaches design requirement, prestress pipe is weldingly fixed on pipeline location steel plate.
(g) repeat step (f), makes whole truss transfer and install.
2. tunnel-type anchorage pre-stress system locating support construction method according to claim 1, it is characterised in that：Composition
With connection of the Bolted angle connection as supplement truss monolithic stability between the locating support blade unit of one locating support truss element
System.
3. the tunnel-type anchorage pre-stress system locating support construction method according to claims 1 or 2, its feature exists
In：Described longitudinally connected rod member uses I-steel.
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| CN113026564A (en) * | 2021-03-19 | 2021-06-25 | 中铁建大桥工程局集团第一工程有限公司 | Tunnel anchor cable conduit modular positioning support sliding system and construction method thereof |
| CN113668392A (en) * | 2021-08-11 | 2021-11-19 | 中建桥梁有限公司 | Construction method for large-inclination-angle tunnel type anchorage secondary lining support |
| CN115370162A (en) * | 2022-09-23 | 2022-11-22 | 中国二十二冶集团有限公司 | Mounting method of assembled prestressed concrete batter post |
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| CN113026564A (en) * | 2021-03-19 | 2021-06-25 | 中铁建大桥工程局集团第一工程有限公司 | Tunnel anchor cable conduit modular positioning support sliding system and construction method thereof |
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| CN113668392A (en) * | 2021-08-11 | 2021-11-19 | 中建桥梁有限公司 | Construction method for large-inclination-angle tunnel type anchorage secondary lining support |
| CN113668392B (en) * | 2021-08-11 | 2023-02-21 | 中建桥梁有限公司 | Construction method for large-inclination-angle tunnel type anchorage secondary lining support |
| CN115370162A (en) * | 2022-09-23 | 2022-11-22 | 中国二十二冶集团有限公司 | Mounting method of assembled prestressed concrete batter post |
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