CN110080806A - A kind of construction technology of tunnel trunk secondary lining - Google Patents
A kind of construction technology of tunnel trunk secondary lining Download PDFInfo
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- CN110080806A CN110080806A CN201910379864.1A CN201910379864A CN110080806A CN 110080806 A CN110080806 A CN 110080806A CN 201910379864 A CN201910379864 A CN 201910379864A CN 110080806 A CN110080806 A CN 110080806A
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- 238000010276 construction Methods 0.000 title claims abstract description 82
- 238000005516 engineering process Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 41
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 29
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 238000013461 design Methods 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims abstract description 10
- 230000000903 blocking effect Effects 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 230000002787 reinforcement Effects 0.000 claims description 16
- 238000005452 bending Methods 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 230000010412 perfusion Effects 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 6
- 230000007547 defect Effects 0.000 claims description 5
- 238000007596 consolidation process Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 241000251468 Actinopterygii Species 0.000 claims description 3
- 241001669679 Eleotris Species 0.000 claims description 3
- 238000003490 calendering Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 3
- 238000009415 formwork Methods 0.000 claims description 3
- 238000005098 hot rolling Methods 0.000 claims description 3
- 229910001026 inconel Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 231100000241 scar Toxicity 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000005641 tunneling Effects 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 2
- 230000002045 lasting effect Effects 0.000 claims description 2
- 210000003205 muscle Anatomy 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 235000019994 cava Nutrition 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- E21D11/10—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
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
-
- 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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- 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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of construction technologies of tunnel trunk secondary lining, including following below scheme: preparation of construction, inverted arch construction, inverted arch filling construction and arch wall construction.For preparation of construction process the following steps are included: establishing automatic gauge concrete mixing plant, design concrete proportioning, concrete stirring is pumped into mould.For inverted arch construction process the following steps are included: inverted arch excavates basement process, inverted arch trestle is in place, and preliminary bracing is laid with waterproof layer, and the binding of inverted arch reinforcing bar installs inverted arch template, pours inverted arch concrete, conserves to strong.Inverted arch fills construction process the following steps are included: installation inverted arch filling template, pours inverted arch fill concrete, maintenance is to strong.For arch wall construction process the following steps are included: arch wall reinforcing bar is bound, arch wall template and trolley are in place, and arch wall construction joint joint part reason installs blocking plate and waterstop, pour arch wall concrete, and to strong, demoulding is simultaneously mobile trolley used for maintenance.The construction technology of secondary lining of the invention can save construction cost and save the construction time.
Description
Technical field
The present invention relates to a kind of construction technologies of tunnel trunk secondary lining.
Background technique
In recent years, developing by leaps and bounds with China's communication, a large amount of buried mountain tunnels will be travelling through rich water high-ground stress
Area, construction faces prominent mud water burst, country rock squeezes large deformation and the serious problems such as even caves in, if supporting is not in time or mode is improper,
Tunnel cross-section is easily led to reduce and supporting construction unstability, the rapid construction for seriously affecting tunnel and safe operation in the future.Tunnel
It after excavation, discharges and deforms in right amount for control surrouding rock stress, increase strcture safety and facilitate construction, applied immediately after tunnel excavation
Make that rigidity is smaller and structure sheaf as permanent bearing structure a part, including preliminary bracing, secondary lining and waterproof layer.How
Construction secondary lining is always the project that insider endeavours research.
Summary of the invention
A kind of construction work of tunnel trunk secondary lining is provided it is an object of the invention to overcome the deficiencies of existing technologies
Skill, it can save the cost of construction, and can save the construction time.
The object of the present invention is achieved like this: a kind of construction technology of tunnel trunk secondary lining, including following below scheme:
Preparation of construction, inverted arch construction, inverted arch filling construction and arch wall construction；
The preparation of construction process designs concrete proportioning the following steps are included: establish automatic gauge concrete mixing plant,
Concrete stirring, is pumped into mould；
The inverted arch construction process is the following steps are included: inverted arch excavates basement process, and inverted arch just props up, and inverted arch trestle is in place,
The binding of inverted arch reinforcing bar, installs inverted arch template, pours inverted arch concrete, conserves to strong；
The inverted arch fills construction process the following steps are included: installing inverted arch filling template, pours inverted arch fill concrete,
Maintenance is to strong；
The arch wall construction process is the following steps are included: preliminary bracing is laid with waterproof layer, the binding of arch wall reinforcing bar, built-in fitting peace
If arch wall template and trolley are in place, arch wall construction joint joint part reason installs blocking plate and waterstop, pours arch wall concrete, supports
For shield to strong, demoulding is simultaneously mobile trolley used；
When carrying out inverted arch reinforcing bar step of ligation and arch wall reinforcing bar step of ligation, reinforcement fabrication is first carried out, reinforcing bar is expired
Foot is claimed below:
(1) end of tension hot rolling plain bar should make 180 ° of crotches, and bending diameter cannot be less than the 2.5 of bar diameter
Times, hook end should there are the straightways for being not less than 3 times of bar diameter；
(2) the round end with Ribbed Bar of tension hot calendering, when using square crotch, the bending diameter of straight hook must not be small
In 5 times of bar diameter, hook end should there are the straightways for being not less than 3 times of bar diameter；
(3) bent-up bar should curve smooth curve, and for plain bar, bending radius cannot be less than the 10 of bar diameter
Times, for Ribbed Bar, bending radius cannot be less than 12 times of bar diameter；
(4) stirrup made of plain bar, end should make the crotch not less than 90 °, have the structure of shockproof requirements to answer
Make 135 ° or 180 ° of crotch；
(5) bending diameter of crotch should be greater than steel bar stress diameter, and cannot be less than 7.5 times of stirrup diameter；Crotch end
The length of straightway cannot be less than 5 times of stirrup diameter, there is the structure of shockproof requirements, cannot be less than 10 times of stirrup diameter；
(6) splice: when overlap joint arc welding, the length of double welded joint is not less than 5d, and the length of inconel weld is not less than
10d, d are bar diameter；Binding lap of splice tensile region is 35d, and compressive region 25d, d are bar diameter；Steel bar stress welding
Or binding connector is arranged in internal force smaller part, and is staggeredly arranged, and connector spacing is not less than 1.3 times of laps of splice；
When carrying out the inverted arch and inverted arch filling construction process, constructed using self-propelled hydraulic inverted arch trestle；Inverted arch template
Using set shaped steel formwork on-site consolidation, and prop up vertical secured；It is symmetrically poured from intermediate to two sides when pouring inverted arch concrete using chute
It builds, with poker vibrator vibration compacting；Inverted arch filling construction is carried out after inverted arch intensity final set immediately, inverted arch concrete strength reaches
Allow walk after to 5MPa, inverted arch concrete strength reach design strength 100% after allow vehicle pass-through；
Carry out the sequence of the arch wall reinforcing bar step of ligation of the arch wall construction process are as follows: the reinforcing bar processed is transported in hole
→ operation platform in place → with welding manner install outside main reinforcement → installation on the outside of longitudinally connected reinforcing bar and adjust outside main reinforcement between
Away from → longitudinally connected reinforcing bar on the inside of the main reinforcement → installation of inside is installed with welding manner and adjust inside main reinforcement spacing → installation stirrup；
The built-in fitting for carrying out the arch wall construction process installs, template and trolley step in place: according to design document, in steel
Embedded box, pipeline etc. are installed in muscle frame slot, accurately release tunnel middle line and elevation with total station and level, it will by track
Trolley moves to lining cutting position, mixes up absolute altitude, by the support lever arm of the good template of tunnel-liner inner outline size adjusting, starts trolley
Hydraulic system, make arch wall Template Location, guarantee that trolley middle line is consistent with tunnel middle line, fixation after the molding of arch wall template, and pacifying
Locking plug template is filled, delivery pump pipeline is reconnected, preparation pours arch wall concrete；
When pouring arch wall concrete step of the arch wall construction process is carried out, is constructed using tunneling boring once moulding method；
It is vibrated using the attached vibrator two ways hung on poker vibrator and trolley；Between the movement of poker vibrator
Away from 1.5 times no more than its operating radius, and the depth being inserted into lower-layer concrete is 5~10cm, and each vibrating for vibration point is held
It the continuous time, is no longer sunk with concrete, bubble no longer occurs, surface laitance occurs obviously for degree；Attached vibrator starts
Time with concrete pour full attached vibrator vibrate range when unlatching, each time of vibration be 1~2 minute.
The construction technology of above-mentioned tunnel trunk secondary lining, wherein carry out the template and platform of the arch wall construction process
Before vehicle step in place, first trolley track is laid with according to tunnel middle line and elevation, trolley track uses standard sleeper and fish platee；
Gauge is consistent with the wheelspan of trolley, and the height difference < 10mm of left and right rail level, restarting motor keeps trolley in place, and applies in template
Brush release agent.
The construction technology of above-mentioned tunnel trunk secondary lining, wherein carry out the arch wall construction process pours arch wall
When concrete step, prevent concrete surface from defect occur using following measures:
A, window is divided to be poured, pump concrete puts in storage should from bottom to top, from placing section joint to non-placing direction
Layering is symmetrical to pour, and prevents bias from making template deformation；When lower-layer concrete is perfused, trolley middle layer window is opened, with benefit exhaust；
In perfusion when layer concrete, trolley top-level windows are opened, with benefit exhaust；
B, when concrete perfusion, several meters of hose is lengthened in pump line front end, should be protruded into window when into window and makes pipe
Mouth as far as possible vertically downward, directly pumps to scar to avoid concrete, corner and abutment wall is caused voids and pits occur；
C, the drop height degree that freely inclines when concreting is no more than 2 meters, when being more than, using utensils such as sliding slot, tumbling barrels, or
It is poured by the aperture reserved in template；
D, guarantee the ratio of mud of concrete；
E, concrete bind the inward end mould direction Shi Yingcong perfusion, exclude air, with guarantee vault perfusion it is full and closely knit
Degree；
F, guarantee continuous concreting, avoid the intermittent time too long, if more than 2 hours, must by pour interrupt into
The processing of row construction joint.
The construction technology of tunnel trunk secondary lining of the invention, can save the cost of construction, and can save the construction time,
Have the function that support reinforcement tunnel, to adapt to the requirement of modernization super expressway tunnel construction.
Specific embodiment
A kind of construction technology of tunnel trunk secondary lining of the invention, including following below scheme: preparation of construction, inverted arch are applied
Work, inverted arch filling construction and arch wall construction.
Preparation of construction process designs concrete proportioning, coagulation the following steps are included: establish automatic gauge concrete mixing plant
Soil stirring, is pumped into mould；
For inverted arch construction process the following steps are included: inverted arch excavates basement process, inverted arch trestle is in place, and preliminary bracing is laid with anti-
Water layer, inverted arch reinforcing bar binding, installs inverted arch template, pours inverted arch concrete, conserves to strong；
Inverted arch fills construction process the following steps are included: installing inverted arch filling template, pours inverted arch fill concrete, conserves
To strong；
For arch wall construction process the following steps are included: arch wall reinforcing bar is bound, arch wall template and trolley are in place, and arch wall construction is sewed up
Stubble processing, installs blocking plate and waterstop, pours arch wall concrete, and to strong, demoulding is simultaneously mobile trolley used for maintenance；
When carrying out inverted arch reinforcing bar step of ligation and arch wall reinforcing bar step of ligation, reinforcement fabrication is first carried out, reinforcing bar is expired
Foot is claimed below:
(1) end of tension hot rolling plain bar should make 180 ° of crotches, and bending diameter cannot be less than the 2.5 of bar diameter
Times, hook end should there are the straightways for being not less than 3 times of bar diameter；
(2) the round end with Ribbed Bar of tension hot calendering, when using square crotch, the bending diameter of straight hook must not be small
In 5 times of bar diameter, hook end should there are the straightways for being not less than 3 times of bar diameter；
(3) bent-up bar should curve smooth curve, and for plain bar, bending radius cannot be less than the 10 of bar diameter
Times, for Ribbed Bar, bending radius cannot be less than 12 times of bar diameter；
(4) stirrup made of plain bar, end should make the crotch not less than 90 °, have the structure of shockproof requirements to answer
Make 135 ° or 180 ° of crotch；
(5) bending diameter of crotch should be greater than steel bar stress diameter, and cannot be less than 7.5 times of stirrup diameter；Crotch end
The length of straightway cannot be less than 5 times of stirrup diameter, there is the structure of shockproof requirements, cannot be less than 10 times of stirrup diameter；
(6) splice: when overlap joint arc welding, the length of double welded joint is not less than 5d, and the length of inconel weld is not less than
10d, d are bar diameter；Binding lap of splice tensile region is 35d, and compressive region 25d, d are bar diameter；Steel bar stress welding
Or binding connector is arranged in internal force smaller part, and is staggeredly arranged, and connector spacing is not less than 1.3 times of laps of splice；
When carrying out inverted arch construction process, to reduce the interference with muck removal transport, constructed using inverted arch trestle；Inverted arch template is adopted
With set shaped steel formwork on-site consolidation, and prop up vertical secured；It is symmetrically poured from intermediate to two sides when pouring inverted arch concrete using chute,
With poker vibrator vibration compacting；Inverted arch answers advanced arch wall lining cutting, and crossover distance is no less than 20m；Inverted arch concrete strength reaches
Allow walk after to 5MPa, inverted arch concrete strength reach design strength 100% after allow vehicle pass-through, inverted arch intensity
Inverted arch filling construction is carried out after final set immediately；
When carrying out inverted arch filling construction process, equally constructed using inverted arch trestle；Inverted arch filling template is using sizing punching block
Plate on-site consolidation, and prop up vertical secured；Concrete is transported in hole using concrete tank car, using chute when pouring inverted arch fill concrete
It is symmetrically poured from centre to two sides, with poker vibrator vibration compacting；Inverted arch fill concrete intensity allows after reaching 5MPa
Walk, inverted arch fill concrete intensity reach design strength 100% after allow vehicle pass-through；
Carry out the sequence of the arch wall reinforcing bar step of ligation of arch wall construction process are as follows: the reinforcing bar processed is transported in hole → is made
Industry rack in place → longitudinally connected reinforcing bar is installed on the outside of the main reinforcement → installation of outside with welding manner and adjust outside main reinforcement spacing →
Longitudinally connected reinforcing bar on the inside of inside main reinforcement → installation is installed with welding manner and adjusts inside main reinforcement spacing → installation stirrup；
When carrying out the template and trolley step in place of arch wall construction process, accurately released in tunnel with total station and level
Line and elevation are laid with trolley track then according to tunnel middle line and elevation, and trolley track uses standard sleeper and fish platee；Gauge
Consistent with the wheelspan of trolley, the height difference < 10mm of left and right rail level starts motor by track and trolley is moved to lining cutting position, adjusts
Good absolute altitude starts the hydraulic system of trolley by the support lever arm of the good template of tunnel-liner inner outline size adjusting, makes arch wall mould
Plate positioning guarantees that trolley middle line is consistent with tunnel middle line, fixed after the molding of arch wall template, and installed plug template, in template
Brushing release agent, reconnects delivery pump pipeline, and preparation pours arch wall concrete；
When pouring arch wall concrete step of arch wall construction process is carried out, is constructed using tunneling boring once moulding method；Using
The attached vibrator two ways hung on poker vibrator and trolley is vibrated；The mobile spacing of poker vibrator is not
Greater than 1.5 times of its operating radius, and the depth being inserted into lower-layer concrete is 5~10cm, when vibrating lasting of each vibration point
Between, it is no longer sunk with concrete, bubble no longer occurs, surface laitance occurs obviously for degree；The running time of attached vibrator
With concrete pour full attached vibrator vibrate range when unlatching, each time of vibration be 1~2 minute.
Mostly there are the surface defects such as pitted skin, bubble and bubble on spring line abutment wall below in lining construction, seriously
Influence Surface Quality of Concrete, the generation of defect with pour and the control for link of vibrating is related, prevent coagulation using following measures
There is defect in native surface:
A, window is divided to be poured, pump concrete puts in storage should from bottom to top, from placing section joint to non-placing direction
Layering is symmetrical to pour, and prevents bias from making template deformation；When lower-layer concrete is perfused, trolley middle layer window is opened, with benefit exhaust；
In perfusion when layer concrete, trolley top-level windows are opened, with benefit exhaust；
B, when concrete perfusion, several meters of hose is lengthened in pump line front end, should be protruded into window when into window and makes pipe
Mouth as far as possible vertically downward, directly pumps to scar to avoid concrete, corner and abutment wall is caused voids and pits occur；
C, the drop height degree that freely inclines when concreting is no more than 2 meters, when being more than, using utensils such as sliding slot, tumbling barrels, or
It is poured by the aperture reserved in template；
D, guarantee the ratio of mud of concrete；
E, concrete bind the inward end mould direction Shi Yingcong perfusion, exclude air, with guarantee vault perfusion it is full and closely knit
Degree；
F, guarantee continuous concreting, avoid the intermittent time too long, if more than 2 hours, must by pour interrupt into
The processing of row construction joint.
Above embodiments are used for illustrative purposes only, rather than limitation of the present invention, the technology people in relation to technical field
Member, without departing from the spirit and scope of the present invention, can also make various transformation or modification, therefore all equivalent
Technical solution also should belong to scope of the invention, should be limited by each claim.
Claims (3)
1. a kind of construction technology of tunnel trunk secondary lining, including following below scheme: preparation of construction, inverted arch construction, inverted arch filling
Construction and arch wall construction；It is characterized in that,
The preparation of construction process designs concrete proportioning, coagulation the following steps are included: establish automatic gauge concrete mixing plant
Soil stirring, is pumped into mould；
The inverted arch construction process is the following steps are included: inverted arch excavates basement process, and inverted arch just props up, and inverted arch trestle is in place, inverted arch
Reinforcing bar binding, installs inverted arch template, pours inverted arch concrete, conserves to strong；
The inverted arch fills construction process the following steps are included: installing inverted arch filling template, pours inverted arch fill concrete, conserves
To strong；
The arch wall construction process the following steps are included: preliminary bracing is laid with waterproof layer, the binding of arch wall reinforcing bar, install by built-in fitting,
Arch wall template and trolley are in place, and arch wall construction joint joint part reason installs blocking plate and waterstop, pours arch wall concrete, conserves
To strong, demoulding is simultaneously mobile trolley used；
Carrying out inverted arch reinforcing bar step of ligation and when arch wall reinforcing bar step of ligation, first to carry out reinforcement fabrication, meet reinforcing bar with
Lower requirement:
(1) end of tension hot rolling plain bar should make 180 ° of crotches, and bending diameter cannot be less than 2.5 times of bar diameter,
Hook end should there are the straightways for being not less than 3 times of bar diameter；
(2) the round end with Ribbed Bar of tension hot calendering, when using square crotch, the bending diameter of straight hook cannot be less than steel
5 times of muscle diameter, hook end should there are the straightways for being not less than 3 times of bar diameter；
(3) bent-up bar should curve smooth curve, and for plain bar, bending radius cannot be less than 10 times of bar diameter,
For Ribbed Bar, bending radius cannot be less than 12 times of bar diameter；
(4) stirrup made of plain bar, end should make the crotch not less than 90 °, have the structure of shockproof requirements that should make
135 ° or 180 ° of crotch；
(5) bending diameter of crotch should be greater than steel bar stress diameter, and cannot be less than 7.5 times of stirrup diameter；Crotch end straight line
The length of section, cannot be less than 5 times of stirrup diameter, there is the structure of shockproof requirements, cannot be less than 10 times of stirrup diameter；
(6) splice: when overlap joint arc welding, the length of double welded joint is not less than 5d, and the length of inconel weld is not less than 10d, d
For bar diameter；Binding lap of splice tensile region is 35d, and compressive region 25d, d are bar diameter；Steel bar stress welding or binding
Connector is arranged in internal force smaller part, and is staggeredly arranged, and connector spacing is not less than 1.3 times of laps of splice；
When carrying out the inverted arch and inverted arch filling construction process, constructed using self-propelled hydraulic inverted arch trestle；Inverted arch template uses
Set shaped steel formwork on-site consolidation, and prop up vertical secured；It is symmetrically poured, is used to two sides from intermediate using chute when pouring inverted arch concrete
Poker vibrator vibration compacting；Inverted arch filling construction is carried out after inverted arch intensity final set immediately, inverted arch concrete strength reaches
Allow walk after 5MPa, inverted arch concrete strength reach design strength 100% after allow vehicle pass-through；
Carry out the sequence of the arch wall reinforcing bar step of ligation of the arch wall construction process are as follows: the reinforcing bar processed is transported in hole → is made
Industry rack in place → longitudinally connected reinforcing bar is installed on the outside of the main reinforcement → installation of outside with welding manner and adjust outside main reinforcement spacing →
Longitudinally connected reinforcing bar on the inside of inside main reinforcement → installation is installed with welding manner and adjusts inside main reinforcement spacing → installation stirrup；
The built-in fitting for carrying out the arch wall construction process installs, template and trolley step in place: according to design document, in reinforcing steel bar frame
Embedded box, pipeline etc. are installed in rack slot, accurately releases tunnel middle line and elevation with total station and level, by track by trolley
Lining cutting position is moved to, absolute altitude is mixed up, by the support lever arm of the good template of tunnel-liner inner outline size adjusting, starts the liquid of trolley
Pressure system makes arch wall Template Location, guarantees that trolley middle line is consistent with tunnel middle line, fixed after the molding of arch wall template, and installs stifled
Head template, reconnects delivery pump pipeline, and preparation pours arch wall concrete；
When pouring arch wall concrete step of the arch wall construction process is carried out, is constructed using tunneling boring once moulding method；Using
The attached vibrator two ways hung on poker vibrator and trolley is vibrated；The mobile spacing of poker vibrator is not
Greater than 1.5 times of its operating radius, and the depth being inserted into lower-layer concrete is 5~10cm, when vibrating lasting of each vibration point
Between, it is no longer sunk with concrete, bubble no longer occurs, surface laitance occurs obviously for degree；The running time of attached vibrator
With concrete pour full attached vibrator vibrate range when unlatching, each time of vibration be 1~2 minute.
2. the construction technology of tunnel trunk secondary lining according to claim 1, which is characterized in that carry out the arch wall and apply
Before template and the trolley step in place of work process, first trolley track is laid with according to tunnel middle line and elevation, trolley track uses
Standard sleeper and fish platee；Gauge is consistent with the wheelspan of trolley, and the height difference < 10mm of left and right rail level, restarting motor makes trolley
In place, the brushing release agent and in template.
3. the construction technology of tunnel trunk secondary lining according to claim 1, which is characterized in that carry out the arch wall and apply
When pouring arch wall concrete step of work process, prevents concrete surface from defect occur using following measures:
A, window is divided to be poured, pump concrete, which puts in storage, to be layered from bottom to top from placing section joint to non-placing direction
It is symmetrical to pour, prevent bias from making template deformation；When lower-layer concrete is perfused, trolley middle layer window is opened, with benefit exhaust；Perfusion
When middle layer concrete, trolley top-level windows are opened, with benefit exhaust；
B, when concrete perfusion, several meters of hose is lengthened in pump line front end, should be protruded into window when into window and uses up nozzle
Amount vertically downward, directly pumps to scar to avoid concrete, corner and abutment wall is caused voids and pits occur；
C, the drop height degree that freely inclines when concreting, when being more than, using utensils such as sliding slot, tumbling barrels, or passes through no more than 2 meters
The aperture reserved in template pours；
D, guarantee the ratio of mud of concrete；
E, concrete bind the inward end mould direction Shi Yingcong perfusion, exclude air, with guarantee vault be perfused full and compactness；
F, guarantee continuous concreting, avoid the intermittent time too long, if more than 2 hours work must be carried out by pouring to interrupt
Make seam processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910379864.1A CN110080806A (en) | 2019-05-05 | 2019-05-05 | A kind of construction technology of tunnel trunk secondary lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910379864.1A CN110080806A (en) | 2019-05-05 | 2019-05-05 | A kind of construction technology of tunnel trunk secondary lining |
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| Publication Number | Publication Date |
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| CN110080806A true CN110080806A (en) | 2019-08-02 |
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ID=67419252
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| CN201910379864.1A Pending CN110080806A (en) | 2019-05-05 | 2019-05-05 | A kind of construction technology of tunnel trunk secondary lining |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374641A (en) * | 2019-08-21 | 2019-10-25 | 中建空列（北京）工程设计研究院有限公司 | The construction method of tunnel-liner |
| CN110497923A (en) * | 2019-08-21 | 2019-11-26 | 中建空列（北京）工程设计研究院有限公司 | Empty rail pipeline transportation system |
| CN110497924A (en) * | 2019-08-21 | 2019-11-26 | 中建空列（北京）工程设计研究院有限公司 | A kind of empty rail pipeline transportation system for tunnel |
| CN110685719A (en) * | 2019-10-31 | 2020-01-14 | 中铁建大桥工程局集团第五工程有限公司 | Quick construction method for double-span simply-supported inverted arch trestle |
| CN111188633A (en) * | 2020-01-08 | 2020-05-22 | 中建三局基础设施建设投资有限公司 | Rapid construction method for secondary lining of small-section tunnel |
| CN111396083A (en) * | 2019-09-29 | 2020-07-10 | 中铁隧道局集团有限公司 | Tunnel lining strip pressing mold pouring process and monitoring method for lining concrete pressure and full state thereof |
| CN111411977A (en) * | 2020-03-26 | 2020-07-14 | 中铁十二局集团有限公司 | Construction method for connecting diaphragm in single-hole double-layer tunnel by mould building |
| CN112610240A (en) * | 2020-12-19 | 2021-04-06 | 中交二公局萌兴工程有限公司 | Secondary lining construction process for mountain tunnel |
| CN113417668A (en) * | 2021-07-29 | 2021-09-21 | 中铁隧道集团一处有限公司 | Pouring construction method for high cantilever tunnel side wall |
| CN114738000A (en) * | 2022-04-23 | 2022-07-12 | 石家庄铁源工程咨询有限公司 | Pouring construction method for secondary lining concrete of railway tunnel arch wall |
| WO2022193200A1 (en) * | 2021-03-18 | 2022-09-22 | 中建三局基础设施建设投资有限公司 | Rapid construction method for secondary lining of small-section tunnel |
| CN115288740A (en) * | 2022-08-11 | 2022-11-04 | 山东水总有限公司 | Lining construction process for small-section tunnel |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110497923A (en) * | 2019-08-21 | 2019-11-26 | 中建空列（北京）工程设计研究院有限公司 | Empty rail pipeline transportation system |
| CN110497924A (en) * | 2019-08-21 | 2019-11-26 | 中建空列（北京）工程设计研究院有限公司 | A kind of empty rail pipeline transportation system for tunnel |
| CN110374641A (en) * | 2019-08-21 | 2019-10-25 | 中建空列（北京）工程设计研究院有限公司 | The construction method of tunnel-liner |
| CN110374641B (en) * | 2019-08-21 | 2021-03-16 | 中建空列（北京）工程设计研究院有限公司 | Construction method of tunnel lining |
| CN111396083B (en) * | 2019-09-29 | 2021-12-10 | 中铁隧道局集团有限公司 | Tunnel lining strip pressing mold pouring process and monitoring method for lining concrete pressure and full state thereof |
| CN111396083A (en) * | 2019-09-29 | 2020-07-10 | 中铁隧道局集团有限公司 | Tunnel lining strip pressing mold pouring process and monitoring method for lining concrete pressure and full state thereof |
| CN110685719A (en) * | 2019-10-31 | 2020-01-14 | 中铁建大桥工程局集团第五工程有限公司 | Quick construction method for double-span simply-supported inverted arch trestle |
| CN111188633A (en) * | 2020-01-08 | 2020-05-22 | 中建三局基础设施建设投资有限公司 | Rapid construction method for secondary lining of small-section tunnel |
| CN111411977A (en) * | 2020-03-26 | 2020-07-14 | 中铁十二局集团有限公司 | Construction method for connecting diaphragm in single-hole double-layer tunnel by mould building |
| CN112610240A (en) * | 2020-12-19 | 2021-04-06 | 中交二公局萌兴工程有限公司 | Secondary lining construction process for mountain tunnel |
| WO2022193200A1 (en) * | 2021-03-18 | 2022-09-22 | 中建三局基础设施建设投资有限公司 | Rapid construction method for secondary lining of small-section tunnel |
| CN113417668A (en) * | 2021-07-29 | 2021-09-21 | 中铁隧道集团一处有限公司 | Pouring construction method for high cantilever tunnel side wall |
| CN113417668B (en) * | 2021-07-29 | 2023-12-15 | 中铁隧道集团一处有限公司 | Pouring construction method of high cantilever tunnel side wall |
| CN114738000A (en) * | 2022-04-23 | 2022-07-12 | 石家庄铁源工程咨询有限公司 | Pouring construction method for secondary lining concrete of railway tunnel arch wall |
| CN115288740A (en) * | 2022-08-11 | 2022-11-04 | 山东水总有限公司 | Lining construction process for small-section tunnel |
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Application publication date: 20190802 |