CN106643365A - Tunnel waste second lining blasting demolition and repairing construction method - Google Patents
Tunnel waste second lining blasting demolition and repairing construction method Download PDFInfo
- Publication number
- CN106643365A CN106643365A CN201611143634.8A CN201611143634A CN106643365A CN 106643365 A CN106643365 A CN 106643365A CN 201611143634 A CN201611143634 A CN 201611143634A CN 106643365 A CN106643365 A CN 106643365A
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- blasting
- lining
- pipe
- concrete
- tunnel
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- Granted
Links
- 238000005422 blasting Methods 0.000 title claims abstract description 34
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 239000002699 waste material Substances 0.000 title abstract 3
- 239000004567 concrete Substances 0.000 claims abstract description 48
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000008901 benefit Effects 0.000 claims abstract description 5
- 230000000977 initiatory effect Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000004880 explosion Methods 0.000 claims description 18
- 239000002360 explosive Substances 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000004746 geotextile Substances 0.000 claims description 6
- 239000012943 hotmelt Substances 0.000 claims description 6
- 238000007569 slipcasting Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 4
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000000084 colloidal system Substances 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 3
- 238000005474 detonation Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 230000029142 excretion Effects 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 239000003999 initiator Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims 1
- 238000004080 punching Methods 0.000 abstract 2
- 238000009415 formwork Methods 0.000 abstract 1
- 241000209094 Oryza Species 0.000 description 2
- 230000001934 delay Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
-
- 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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Engineering & Computer Science (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a tunnel waste second lining concrete blasting demolition and repairing construction method, which is invented for solving the problems that existing blasting can easily damage second lining concrete at a non-demolished section, and a repairing construction process is complicated. The method comprises the steps of slotting at a junction of a demolished section and a non-demolished section; dividing a second lining part to be demolished into a plurality of blasting sections; kerving at each blasting section; blasting from the middle part to two sides by utilizing a lateral freeing surface formed by kerving; kerving blasting for punching perpendicular holes along an inner wall of a tunnel, and circularly blasting for punching horizontal holes along an axial direction of the tunnel; intensively charging for kerving blasting, and charging layer by layer for circular blasting; adopting a non-electric detonating tube initiating system for initiating at the same time; repairing a second lining drainage system, processing a primary-branch fracture surface before paving, and after embedding a longitudinal plastic check well and a circumferential plastic check well, paving non-woven fabrics and a waterproof plate; adopting a trolley for secondary lining; installing an air vent hole and an injected hole; and dismantling a formwork for maintaining. The tunnel waste second lining concrete blasting demolition and repairing construction method provided by the invention has the advantages that the second lining concrete at the non-demolished section cannot be damaged, and the repairing construction speed is fast.
Description
Technical field：
The present invention relates to the discarded two lining concrete in demolition blasting tunnel and method for repairing and constructing.
Background technology：
Often occurs the situation that two lining concrete need to remove because intensity is not enough during constructing tunnel, two lining concrete are torn open
Except when should try one's best reduction to country rock and the disturbance of preliminary bracing.But current blasting construction method is to the non-two lining concrete for tearing section open
Affect big, easily the non-two lining concrete for tearing section open are damaged, also need to carry out secondary reparation, both increased construction cost, affect again
Duration.
The process for carrying out repairing construction to two lining concrete removal sections at present in addition is complicated, and speed is slow.
The content of the invention：
The technical problem to be solved is to provide one kind and the non-lining concrete of section two of tearing open will not be damaged, to removing section
Repairing construction process is simple, and fireballing tunnel discarded two serves as a contrast demolition blasting and method for repairing and constructing.
What above-mentioned purpose was realized in：First the dismounting section side of section and non-dismounting section intersection is being removed using artificial
Pneumatic pick is slotted, groove width 40cm, and groove depth is 30 ~ 35cm；
Two shirt portion position to be removed is divided into into several explosion sections, each explosion segment length is 12m；
The kerve of a wide 3m is first drawn in the middle of each explosion section, the length of the kerve is the girth that tunnel cross-section removes position；
The lateral free face formed using kerve, explosion is advanced from centre to both sides；
Kerf blasting beats upright opening along tunnel inner wall, and circulation propulsion explosion is axially fetched water flat hole along tunnel, and each circulation propulsion is about
3m；Several upright openings are beaten on tunnel inner wall at kerve（It is perpendicular with tunnel inner wall）, in the tunnel inner wall of kerve both sides
It is upper to beat several lateral apertures；
Kerf blasting parameter：Hole depth 0.30m, pitch-row 0.35m, single hole explosive payload 150g, unit consumption 2.0kg/m；
Circulation blasting parameter：Hole depth 0.35m, pitch-row 0.40m, single hole explosive payload 350g, unit consumption 1.5kg/m；
Kerf blasting concentrated charge, circulates explosion layered charge, is blocked using yellow mud；
From explosive：Explosive is emulsion；Detonator is non-electrical millisecond delay detonating detonator；
Blasting circuit：
In order to ensure safety standard is quick-fried, using nonel tube initiation system, volley detonation；The non-millisecond thunder of MS-7 sections is adopted in hole
Pipe, adopts the non-millisecond detonator time delay of MS-3 sections outside hole, wherein constitute clusters per 2～10 on-electric detonators, per between group with one section
Connection, forms cross duplicate network initiator and detonates；
Ensure good filling quality, forbid to be mingled with rubble in tamper during multiple-row blasting；
According to site test results, it is determined that suitable explosive payload, it is to avoid excess powder charge；
Repair two and serve as a contrast waterproof and water drainage system：
（1）To the process of a just section before laying：
A face at the beginning of labor cleaning and two lining joint areas after two linings are removed, then drop-over drain pipe and laying geotextiles and anti-again
Water plate, to the artificial raggle of the lining construction joint of two ends two rubber fastening band and sealing rod are installed；
After old splash guard has been cleared up, the integrity of preliminary bracing is observed, if any damage, should in time clear up loosening portion around damage
Point, and multiple spray is carried out, concrete surface smoothness is sprayed again should meet the requirement of D/L≤1/10（D is adjacent two salient point of preliminary bracing basal plane
The depth for falling in；L is the distance between the adjacent salient point of basic unit, and L≤1m）, then carry out the laying again of waterproof and water drainage system；
（2）Permeable blind pipe is arranged：
φ 50mm rings and φ 80mm longitudinal directions Permeable blind pipe, Permeable blind pipe material selection are set in the early stage between supporting and non-woven fabrics
Mono-shell hole-punched bellows, ring φ 50mm and longitudinal direction φ 80mm blind pipe located at subsoil water compared with development at, ring blind pipe spacing is 10
Meter Yi Dao, longitudinal blind pipe is arranged at abutment wall foot, and sets abutment wall tapping pipe by subsoil water introducing hole medial sulcus every 5-10 rice,
Ring and longitudinal blind pipe is asked directly to bend into tunnel lateral sulcus, the permeable french drain light and shade lining cutting section in longitudinal direction is respectively provided with and must not connect, indulges
To blind pipe to be segmented excretion as principle, draining point slope point is preferably at expansion joint or subsiding crack, in case current are along seam infiltration；
（3）The laying of geotextiles, splash guard
After longitudinal direction, ring Permeable blind pipe are buried and finished, first lay and lay after non-woven fabrics splash guard, operation is first used in non-woven fabrics laying
Single width non-woven fabrics are fixed to precalculated position by chassis, then non-woven fabrics are fixed on just spray concrete face with nailing, special fusible interlining
Pad and nailing arrange in blossom type, and up and down molding is fixed for left and right, non-woven fabrics and the closely connected laying in spray concrete surface, should smooth out, without grand
Corrugationless is played, non-woven fabrics lap width is not less than 50mm；
Single width splash guard is first fixed to precalculated position by splash guard laying with Mobile workbench, first eliminates the dust of waterproof plate surface,
Again predetermined temperature is heated with Manual hot melting device, speed is welded on the special hot melt liner of fixed non-woven fabrics, splash guard overlap joint is wide
Degree is more than 15cm, and using automatic double slit hot-melt welding machine, the effective width of wall scroll weld seam is not less than 15mm, and splash guard joint welding connects rear two
Bar stays an air channel between stitching, and for air monitor welding quality is detected, the splash guard edge of broken-up laying should be reserved
At least 20cm overlaps surplus；
Splash guard overlapping the slot should with movement joint, construction joint, country rock concentrate water outlet at etc. waterproof weak link stagger, distance should not be little
In 50cm；
Non-woven fabrics, splash guard using laying " from top to bottom ", downward paving are laid to interior rail level absolute altitude from vault is symmetrical
It is set as the domain；
Form concrete lining cutting：
Tunnel Second Lining is constructed using integral hydraulic lining trolley, and concrete is pumped into mould by delivery pump, in lining construction in time
The pre-buried φ 20mm coating steel pipes of embedded backfill slip casting and the built-in fitting of other affiliated facilities, and in the pre-buried φ of vault midline position
One, 42mm seamless steel pipes, use to the aerofluxuss in casting process；Construction technology is as follows：
（1）Chassis is in place：
It is mobile trolley used in place according to unwrapping wire position, chassis anti-skid device is arranged to chassis rail top after chassis is in place；
（2）Concreting：
Dismounting section two is served as a contrast and poured using C30 form concretes, when pouring arch wall concrete, is symmetrically poured from bottom to top, side
Wall position concrete takes buried tube type to pour, and by the direct top pressure of hydraulic pump mould is entered, and extruding jacking type is poured；Poured using a point storehouse Fen Kou
Build, arch first takes the formula of exiting to pour, and is finally bound with forced；Concrete attached vibrator and poker vibrator join
Conjunction is made firm by ramming, it is ensured that inside concrete is closely knit, outer smooth, protects the pre- Grouting Pipe for being embedded in inside concrete, prevents its crooked
With topple over, to guarantee two linings after backfill slip casting can be smoothed out；
（3）Steam vent and injected hole are installed：
1. lining trolley arch rod radial air vent：
Two ends and middle part respectively set a steam vent on lining trolley top panel, are connected using ring flange mode, and steam vent is simultaneous
Do observation port and injected hole；
Radial direction exhaustor is connected by ring flange, and the top mouth of pipe holds out against with waterproof layer, makes waterproof layer closely connected with basal plane；
2. longitudinal exhaustor is installed with Grouting Pipe：
The longitudinal exhaustor in top adopts the colloid flexible pipe or pvc pipe of φ 20mm ~ φ 30mm, pipe shaft to lay blossom type benefit with Grouting Pipe
Slurry hole, 2 ~ 3mm of aperture, longitudinal pitch≤30cm；
The longitudinal exhaustor in top is installed using pre- patch mode, fixed dot spacing≤80cm with Grouting Pipe；
（4）Form removal is conserved：
When side, arch concrete strength reach 8MPa when, can form removal, carry out watering maintenance after form removal in time, curing time is many
In 14 days.
It is an advantage of the invention that：The non-lining concrete of section two of tearing open will not be damaged, to removing the letter of section repairing construction process
Single, speed is fast, and construction cost is low, and quality is good.
Specific embodiment：
Slotted using artificial pneumatic pick in the dismounting section side for removing section and non-dismounting section intersection first, groove width 40cm, fluting is deep
Spend for 30 ~ 35cm；
Two shirt portion position to be removed is divided into into several explosion sections, each explosion segment length is 12m；
The kerve of a wide 3m is first drawn in the middle of each explosion section, the length of the kerve is the girth that tunnel cross-section removes position；
The lateral free face formed using kerve, explosion is advanced from centre to both sides；
Kerf blasting beats upright opening along tunnel inner wall, and circulation propulsion explosion is axially fetched water flat hole along tunnel, and each circulation propulsion is about
3m；Several upright openings are beaten on tunnel inner wall at kerve（It is perpendicular with tunnel inner wall）, in the tunnel inner wall of kerve both sides
It is upper to beat several lateral apertures；
Kerf blasting parameter：Hole depth 0.30m, pitch-row 0.35m, single hole explosive payload 150g, unit consumption 2.0kg/m；
Circulation blasting parameter：Hole depth 0.35m, pitch-row 0.40m, single hole explosive payload 350g, unit consumption 1.5kg/m；
Kerf blasting concentrated charge, circulates explosion layered charge, is blocked using yellow mud；
From explosive：Explosive is emulsion；Detonator is non-electrical millisecond delay detonating detonator；
Blasting circuit：
In order to ensure safety standard is quick-fried, using nonel tube initiation system, volley detonation；MS-7 section non-electrical millisecond thunders are adopted in hole
Pipe, adopts MS-3 section non-electric ms detonator time delays outside hole, wherein constitute clusters per 2～10 on-electric detonators, per between group with one
Section connection, forms cross duplicate network initiator and detonates；
Ensure good filling quality, forbid to be mingled with rubble in tamper during multiple-row blasting；
According to site test results, it is determined that suitable explosive payload, it is to avoid excess powder charge；
Repair two and serve as a contrast waterproof and water drainage system：
（1）To the process of a just section before laying：
A face at the beginning of labor cleaning and two lining joint areas after two linings are removed, then drop-over drain pipe and laying geotextiles and anti-again
Water plate, to the artificial raggle of the lining construction joint of two ends two rubber fastening band and sealing rod are installed；
After old splash guard has been cleared up, the integrity of preliminary bracing is observed, if any damage, should in time clear up loosening portion around damage
Point, and multiple spray is carried out, concrete surface smoothness is sprayed again should meet the requirement of D/L≤1/10（D is adjacent two salient point of preliminary bracing basal plane
The depth for falling in；L is the distance between the adjacent salient point of basic unit, and L≤1m）, then carry out the laying again of waterproof and water drainage system；
（2）Permeable blind pipe is arranged：
φ 50mm rings and φ 80mm longitudinal directions Permeable blind pipe, Permeable blind pipe material selection are set in the early stage between supporting and non-woven fabrics
Mono-shell hole-punched bellows, ring φ 50mm and longitudinal direction φ 80mm blind pipe located at subsoil water compared with development at, ring blind pipe spacing is 10
Meter Yi Dao, longitudinal blind pipe is arranged at abutment wall foot, and sets abutment wall tapping pipe by subsoil water introducing hole medial sulcus every 5-10 rice,
Ring and longitudinal blind pipe is asked directly to bend into tunnel lateral sulcus, the permeable french drain light and shade lining cutting section in longitudinal direction is respectively provided with and must not connect, indulges
To blind pipe to be segmented excretion as principle, draining point slope point is preferably at expansion joint or subsiding crack, in case current are along seam infiltration；
（3）The laying of geotextiles, splash guard
After longitudinal direction, ring Permeable blind pipe are buried and finished, first lay and lay after non-woven fabrics splash guard, operation is first used in non-woven fabrics laying
Single width non-woven fabrics are fixed to precalculated position by chassis, then non-woven fabrics are fixed on just spray concrete face with nailing, special fusible interlining
Pad and nailing arrange in blossom type, and up and down molding is fixed for left and right, non-woven fabrics and the closely connected laying in spray concrete surface, should smooth out, without grand
Corrugationless is played, non-woven fabrics lap width is not less than 50mm；
Single width splash guard is first fixed to precalculated position by splash guard laying with Mobile workbench, first eliminates the dust of waterproof plate surface,
Again predetermined temperature is heated with Manual hot melting device, speed is welded on the special hot melt liner of fixed non-woven fabrics, splash guard overlap joint is wide
Degree is more than 15cm, and using automatic double slit hot-melt welding machine, the effective width of wall scroll weld seam is not less than 15mm, and splash guard joint welding connects rear two
Bar stays an air channel between stitching, and for air monitor welding quality is detected, the splash guard edge of broken-up laying should be reserved
At least 20cm overlaps surplus；
Splash guard overlapping the slot should with movement joint, construction joint, country rock concentrate water outlet at etc. waterproof weak link stagger, distance should not be little
In 50cm；
Non-woven fabrics, splash guard using laying " from top to bottom ", downward paving are laid to interior rail level absolute altitude from vault is symmetrical
It is set as the domain；
Form concrete lining cutting：
Tunnel Second Lining is constructed using integral hydraulic lining trolley, and concrete is pumped into mould by delivery pump, in lining construction in time
The pre-buried φ 20mm coating steel pipes of embedded backfill slip casting and the built-in fitting of other affiliated facilities, and in the pre-buried φ of vault midline position
One, 42mm seamless steel pipes, use to the aerofluxuss in casting process；Construction technology is as follows：
（1）Chassis is in place：
It is mobile trolley used in place according to unwrapping wire position, chassis anti-skid device is arranged to chassis rail top after chassis is in place；
（2）Concreting：
Dismounting section two is served as a contrast and poured using C30 form concretes, when pouring arch wall concrete, is symmetrically poured from bottom to top, side
Wall position concrete takes buried tube type to pour, and by the direct top pressure of hydraulic pump mould is entered, and extruding jacking type is poured；Poured using a point storehouse Fen Kou
Build, arch first takes the formula of exiting to pour, and is finally bound with forced；Concrete attached vibrator and poker vibrator join
Conjunction is made firm by ramming, it is ensured that inside concrete is closely knit, outer smooth, protects the pre- Grouting Pipe for being embedded in inside concrete, prevents its crooked
With topple over, to guarantee two linings after backfill slip casting can be smoothed out；
（3）Steam vent and injected hole are installed：
1. lining trolley arch rod radial air vent：
Two ends and middle part respectively set a steam vent on lining trolley top panel, are connected using ring flange mode, and steam vent is simultaneous
Do observation port and injected hole；
Radial direction exhaustor is connected by ring flange, and the top mouth of pipe holds out against with waterproof layer, makes waterproof layer closely connected with basal plane；
2. longitudinal exhaustor is installed with Grouting Pipe：
The longitudinal exhaustor in top adopts the colloid flexible pipe or pvc pipe of φ 20mm ~ φ 30mm, pipe shaft to lay blossom type benefit with Grouting Pipe
Slurry hole, 2 ~ 3mm of aperture, longitudinal pitch≤30cm；
The longitudinal exhaustor in top is installed using pre- patch mode, fixed dot spacing≤80cm with Grouting Pipe；
（4）Form removal is conserved：
When side, arch concrete strength reach 8MPa when, can form removal, carry out watering maintenance after form removal in time, curing time is many
In 14 days.
Claims (1)
1. the discarded two lining demolition blasting in tunnel and method for repairing and constructing, is characterized in that：Removing section and non-dismounting section boundary first
The dismounting section side at place is slotted using artificial pneumatic pick, groove width 40cm, and groove depth is 30 ~ 35cm；
Two shirt portion position to be removed is divided into into several explosion sections, each explosion segment length is 12m；
The kerve of a wide 3m is first drawn in the middle of each explosion section, the length of the kerve is the girth that tunnel cross-section removes position；
The lateral free face formed using kerve, explosion is advanced from centre to both sides；
Kerf blasting beats upright opening along tunnel inner wall, and circulation propulsion explosion is axially fetched water flat hole along tunnel, and each circulation propulsion is about
3m；Several upright openings are beaten on tunnel inner wall at kerve, several lateral apertures are beaten on the tunnel inner wall of kerve both sides；
Kerf blasting parameter：Hole depth 0.30m, pitch-row 0.35m, single hole explosive payload 150g, unit consumption 2.0kg/m；
Circulation blasting parameter：Hole depth 0.35m, pitch-row 0.40m, single hole explosive payload 350g, unit consumption 1.5kg/m；
Kerf blasting concentrated charge, circulates explosion layered charge, is blocked using yellow mud；
From explosive：Explosive is emulsion；Detonator is non-electrical millisecond delay detonating detonator；
Blasting circuit：
In order to ensure safety standard is quick-fried, using nonel tube initiation system, volley detonation；The non-millisecond thunder of MS-7 sections is adopted in hole
Pipe, adopts the non-millisecond detonator time delay of MS-3 sections outside hole, wherein constitute clusters per 2～10 on-electric detonators, per between group with one section
Connection, forms cross duplicate network initiator and detonates；
Ensure good filling quality, forbid to be mingled with rubble in tamper during multiple-row blasting；
According to site test results, it is determined that suitable explosive payload, it is to avoid excess powder charge；
Repair two and serve as a contrast waterproof and water drainage system：
（1）To the process of a just section before laying：
A face at the beginning of labor cleaning and two lining joint areas after two linings are removed, then drop-over drain pipe and laying geotextiles and anti-again
Water plate, to the artificial raggle of the lining construction joint of two ends two rubber fastening band and sealing rod are installed；
After old splash guard has been cleared up, the integrity of preliminary bracing is observed, if any damage, should in time clear up loosening portion around damage
Point, and multiple spray is carried out, concrete surface smoothness is sprayed again should meet the requirement of D/L≤1/10（D is adjacent two salient point of preliminary bracing basal plane
The depth for falling in；L is the distance between the adjacent salient point of basic unit, and L≤1m）, then carry out the laying again of waterproof and water drainage system；
（2）Permeable blind pipe is arranged：
φ 50mm rings and φ 80mm longitudinal directions Permeable blind pipe, Permeable blind pipe material selection are set in the early stage between supporting and non-woven fabrics
Mono-shell hole-punched bellows, ring φ 50mm and longitudinal direction φ 80mm blind pipe located at subsoil water compared with development at, ring blind pipe spacing is 10
Meter Yi Dao, longitudinal blind pipe is arranged at abutment wall foot, and sets abutment wall tapping pipe by subsoil water introducing hole medial sulcus every 5-10 rice,
Ring and longitudinal blind pipe is asked directly to bend into tunnel lateral sulcus, the permeable french drain light and shade lining cutting section in longitudinal direction is respectively provided with and must not connect, indulges
To blind pipe to be segmented excretion as principle, draining point slope point is preferably at expansion joint or subsiding crack, in case current are along seam infiltration；
（3）The laying of geotextiles, splash guard
After longitudinal direction, ring Permeable blind pipe are buried and finished, first lay and lay after non-woven fabrics splash guard, operation is first used in non-woven fabrics laying
Single width non-woven fabrics are fixed to precalculated position by chassis, then non-woven fabrics are fixed on just spray concrete face with nailing, special fusible interlining
Pad and nailing arrange in blossom type, and up and down molding is fixed for left and right, non-woven fabrics and the closely connected laying in spray concrete surface, should smooth out, without grand
Corrugationless is played, non-woven fabrics lap width is not less than 50mm；
Single width splash guard is first fixed to precalculated position by splash guard laying with Mobile workbench, first eliminates the dust of waterproof plate surface,
Again predetermined temperature is heated with Manual hot melting device, speed is welded on the special hot melt liner of fixed non-woven fabrics, splash guard overlap joint is wide
Degree is more than 15cm, and using automatic double slit hot-melt welding machine, the effective width of wall scroll weld seam is not less than 15mm, and splash guard joint welding connects rear two
Bar stays an air channel between stitching, and for air monitor welding quality is detected, the splash guard edge of broken-up laying should be reserved
At least 20cm overlaps surplus；
Splash guard overlapping the slot should with movement joint, construction joint, country rock concentrate water outlet at etc. waterproof weak link stagger, distance should not be little
In 50cm；
Non-woven fabrics, splash guard using laying " from top to bottom ", downward paving are laid to interior rail level absolute altitude from vault is symmetrical
It is set as the domain；
Form concrete lining cutting：
Tunnel Second Lining is constructed using integral hydraulic lining trolley, and concrete is pumped into mould by delivery pump, in lining construction in time
The pre-buried φ 20mm coating steel pipes of embedded backfill slip casting and the built-in fitting of other affiliated facilities, and in the pre-buried φ of vault midline position
One, 42mm seamless steel pipes, use to the aerofluxuss in casting process；Construction technology is as follows：
（1）Chassis is in place：
It is mobile trolley used in place according to unwrapping wire position, chassis anti-skid device is arranged to chassis rail top after chassis is in place；
（2）Concreting：
Dismounting section two is served as a contrast and poured using C30 form concretes, when pouring arch wall concrete, is symmetrically poured from bottom to top, side
Wall position concrete takes buried tube type to pour, and by the direct top pressure of hydraulic pump mould is entered, and extruding jacking type is poured；Poured using a point storehouse Fen Kou
Build, arch first takes the formula of exiting to pour, and is finally bound with forced；Concrete attached vibrator and poker vibrator join
Conjunction is made firm by ramming, it is ensured that inside concrete is closely knit, outer smooth, protects the pre- Grouting Pipe for being embedded in inside concrete, prevents its crooked
With topple over, to guarantee two linings after backfill slip casting can be smoothed out；
（3）Steam vent and injected hole are installed：
1. lining trolley arch rod radial air vent：
Two ends and middle part respectively set a steam vent on lining trolley top panel, are connected using ring flange mode, and steam vent is simultaneous
Do observation port and injected hole；
Radial direction exhaustor is connected by ring flange, and the top mouth of pipe holds out against with waterproof layer, makes waterproof layer closely connected with basal plane；
2. longitudinal exhaustor is installed with Grouting Pipe：
The longitudinal exhaustor in top adopts the colloid flexible pipe or pvc pipe of φ 20mm ~ φ 30mm, pipe shaft to lay blossom type benefit with Grouting Pipe
Slurry hole, 2 ~ 3mm of aperture, longitudinal pitch≤30cm；
The longitudinal exhaustor in top is installed using pre- patch mode, fixed dot spacing≤80cm with Grouting Pipe；
（4）Form removal is conserved：
When side, arch concrete strength reach 8MPa when, can form removal, carry out watering maintenance after form removal in time, curing time is many
In 14 days.
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| CN201611143634.8A CN106643365B (en) | 2016-12-13 | 2016-12-13 | Two lining demolition blastings and method for repairing and constructing are discarded in tunnel |
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| CN107587884A (en) * | 2017-10-11 | 2018-01-16 | 中国葛洲坝集团第六工程有限公司 | Tunnel double-lining concrete vault backfills grouting device |
| CN109026065A (en) * | 2018-07-25 | 2018-12-18 | 中铁十六局集团有限公司 | A kind of Tunnel Second Lining zero-fault construction method |
| CN109505629A (en) * | 2018-12-29 | 2019-03-22 | 北京京水建设集团有限公司 | Steel pipe behind fill concrete structure and construction method in a kind of tunnel |
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| CN107587884A (en) * | 2017-10-11 | 2018-01-16 | 中国葛洲坝集团第六工程有限公司 | Tunnel double-lining concrete vault backfills grouting device |
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| CN110410102A (en) * | 2019-08-22 | 2019-11-05 | 西南交通大学 | A kind of construction method for removing operation high-speed rail tunnel interlayer lining cutting |
| CN110410102B (en) * | 2019-08-22 | 2021-05-18 | 西南交通大学 | Construction method for removing interlayer lining of operating high-speed rail tunnel |
| CN110487137A (en) * | 2019-08-27 | 2019-11-22 | 山东科技大学 | A kind of deep hole presplitting water coincidence blast charging structure and construction method |
| CN110487137B (en) * | 2019-08-27 | 2021-07-23 | 山东科技大学 | Deep hole pre-splitting water coupling blasting charging structure and construction method |
| CN110593909A (en) * | 2019-10-18 | 2019-12-20 | 中铁隧道局集团有限公司 | Tunnel secondary lining dismounting and replacing construction method |
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