CN107762532A - Tunnel vault band mould grouting construction method - Google Patents
Tunnel vault band mould grouting construction method Download PDFInfo
- Publication number
- CN107762532A CN107762532A CN201610706453.5A CN201610706453A CN107762532A CN 107762532 A CN107762532 A CN 107762532A CN 201610706453 A CN201610706453 A CN 201610706453A CN 107762532 A CN107762532 A CN 107762532A
- Authority
- CN
- China
- Prior art keywords
- slip casting
- concrete
- circular hole
- grouting
- tunnel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010276 construction Methods 0.000 title claims abstract description 19
- 238000007569 slipcasting Methods 0.000 claims abstract description 63
- 239000004567 concrete Substances 0.000 claims abstract description 54
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims abstract description 7
- 239000002002 slurry Substances 0.000 claims abstract description 6
- 239000011440 grout Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 238000005520 cutting process Methods 0.000 claims description 12
- 210000002445 nipple Anatomy 0.000 claims description 8
- 244000144985 peep Species 0.000 claims description 8
- 230000015271 coagulation Effects 0.000 claims description 7
- 238000005345 coagulation Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000005336 cracking Methods 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 230000008439 repair process Effects 0.000 abstract description 2
- 230000036039 immunity Effects 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 238000009955 starching Methods 0.000 abstract 1
- 238000000151 deposition Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 210000004911 serous fluid Anatomy 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000010959 steel Substances 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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (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
Tunnel vault band is molded into starching construction party, and its construction method step of method is as follows:Installation lining trolley → determine that slip casting length of tube → installation fixes the solidifying native special filling mortar → startup slip casting all-in-one slip casting → slip casting terminates → of slip casting → preparation in Grouting Pipe → observation vault template and lays down flange;Using the band mould slurry injection technique of the party and microdilatancy, high-flowing concrete slip casting, bonding force is strong, has to the section gap that concreting is formed and repairs, its combination property is better than the performance of lining concrete;And the risk for reducing tunnel lining concrete cracking, coming to nothing and coming off, immunity of the tunnel-liner to geologic risk is improved, the risk of tunnel-liner generation disaster when reducing operation can be once full, and the later stage no longer spends more construction cost;Pass through the application of this method, it is ensured that tunnel-liner quality.
Description
Technical field
The present invention relates to a kind of method for tunnel construction, specifically a kind of tunnel vault band mould grouting construction method.
Background technology
Lining construction due to the limitation of lining concrete, cause after two backings particularly vault occur hole,
Interlayer etc. comes to nothing area, Concrete Filled leakiness, the strong influence bulk strength of lining concrete.And in general tunnel two
Backing grouting behind shaft or drift lining is the secondary construction after lining cutting completion, and its cement mortar injecting paste material cost is low, but its fragility is big, low intensity,
Shrink seriously, bleeding is more, and generally requires repeatedly drilling, slip casting and radar detection, and construction cost is higher, especially the later stage two
During secondary slip casting, the advantage that lining cutting overall mechanical properties are improved with the timely slip casting of mould is lost, slip casting is formed " two layers of skin " again
Structure., therefore, must be next closely knit to backfill slip casting in constructing tunnel meanwhile slip casting has antiseepage function to a certain extent
The area of coming to nothing of two lining concrete behinds, it is ensured that the bulk strength of lining concrete, strengthen water-proof function.
The content of the invention
The purpose of the present invention is in view of the shortcomings of the prior art, there is provided a kind of tunnel-liner vault band template mortar depositing construction side
Method, this method are using a template two lining slip casting, and time control is not take up the normal two lining mortar depositing construction time in 2h or so;
Used Grouting Pipe and microdilatancy, slow setting, early strength mortar, the timely slip casting after lining cutting pours, can effectively improve lining cutting coagulation
Adhesive integrity between soil and grouting serous fluid;Meanwhile with material consumption is reduced, the input of manpower is reduced, reduce engineering cost
The effect of, and can be applied in the constructing tunnels such as highway, subway, mine.
The technical scheme is that:Tunnel vault band mould grouting construction method, its construction method step are as follows:
Step 1:Assembling lining trolley is arranged on after being secured in position on the track of tunnel ground, slip casting all-in-one processed is placed on
In the ground surface platform of lining trolley bottom, the both ends of delivery hose are connected to reduction nipple and slip casting all-in-one discharge nozzle processed
On mouth;
Step 2:Grouting Pipe cutting length is determined, by ready Grouting Pipe or blast pipe by entering at preformed hole at the top of chassis
Row " trying on " measures.First line of mark in the first Grouting Pipe of vault template outer, for detecting whether lining thickness accords with
Close and require;Article 2 graticule, i.e. the blanking length of the first Grouting Pipe are drawn from vault template outer+locating sleeve length 4.3cm+2cm
Degree;
Step 3:The fixed Grouting Pipe of installation:, will with flange after the Grouting Pipe of well cutting is penetrated into the first circular hole in vault template
First Grouting Pipe is fixed in the first circular hole in vault template;
Step 4:Observation judges to coagulate native slip casting or situation of rushing to summit in vault template:According to the sequential observation coagulation of fill orifice
The pulp situation of native injected hole or peep hole, the concrete grouting checked in vault template or situation of rushing to summit, judge vault template
Inside whether fill concrete grout;
Step 5:Prepare special filling mortar:Using special slurrying slip casting all-in-one 8, special filling mortar is prepared as mixed
Native grout material is coagulated, special filling mortar is as grout material(In the ratio of water to material of configuration:Water:Fill mortar=18:100(Weight ratio),
Separately add 0.08% micro-expanding agent;Cement preferably uses portland cement;Injecting paste material requires continuous mixing, is strictly supervised during mixing
Control every material usage, it is ensured that grouting quality;
Step 6:Slip casting:Start slip casting all-in-one processed, observe the second circular hole, the 3rd circular hole and the 4th circular hole successively, while arrange
Stomata, for whether flowing out noted concrete grout, when other peep holes outflow concrete grouting reaches the concrete of equal densities
During slurry, note concrete grout is immediately finished, the circular hole is closed;When pressure gauge reaches 1.0MPa, aperture is not flowed out mixed yet
Native slip casting is coagulated, next injected hole should be changed and carry out slip casting again, until middle second circular hole, the 3rd circular hole and the 4th circular hole and mould
Peephole on the termination of plate 12 stops slip casting when flowing out concrete grout 3-5s;
Step 7:Slip casting terminates, and concrete is unloaded from the pulp mouth of pipe and the reduction nipple tail end mouth of pipe of slip casting all-in-one processed
Slip casting delivery hose, slip casting pore is blocked, after concrete grouting initial set, locating flange is laid down, goes to next hole slip casting.
The beneficial effects of the invention are as follows:Using the band mould slurry injection technique of this method and microdilatancy, high-flowing concrete note
Slurry, bonding force is strong, has to the section gap that concreting is formed and repairs, its combination property is better than the property of lining concrete
Energy;And the risk for reducing tunnel lining concrete cracking, coming to nothing and coming off, improve tunnel-liner and geologic risk is immunized
Power, the risk of tunnel-liner generation disaster when reducing operation, can be once full, and the later stage no longer spends more be constructed into
This;Pass through the application of this method, it is ensured that tunnel-liner quality.
Brief description of the drawings
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is lining trolley structural representation;
Fig. 2 is longitudinal sectional drawing (i.e. A-A sectional views) in Fig. 1;
Fig. 3 is B in Fig. 1 to enlarged drawing(Connector scheme of installation).
Embodiment
In Fig. 1, Fig. 2, Fig. 3 embodiment that the present invention provides, lining trolley frame is welded into channel-section steel, metallic plate, it is very heavy
The difference of top 15, vault template 11, left side arch wall template 14, the combination of right side arch wall template 13 are arranged on lining trolley frame, vehicle frame
The roller of bottom installation is seated in tunnel on the track of ground surface platform, composition lining construction lining trolley a.By lining cutting platform
After car a is secured in position in the tunnel excavated, slip casting all-in-one 8 processed is placed on the ground of lining trolley a bottoms, conveying is soft
Pipe b both ends are connected on reduction nipple 619 and the slip casting all-in-one pulp mouth of pipe processed.
In vault template 11(Longitudinal direction)Equidistantly it is provided with 3 filling concrete holes 5 of structure identical and 4 structure identicals
4 circular holes;First filling concrete hole 51, the second filling concrete hole 52, the 3rd filling concrete hole 53;Tunnel-liner vault
The top of end mould 12 of one end is provided with peephole 121;At the lining trolley a top of vault template 11(Longitudinal direction)Provided with 4 circular holes
Aperture is 40mm;
Described 4 circular holes of structure identical are:First circular hole 61, the second circular hole 62, the 3rd circular hole 63, the 4th circular hole 64 or
Peep hole;First circular hole 61 is located at the blind end of two lining concrete;4th circular hole 64 is positioned at the open end of two lining concrete;The
The circular hole of four circular hole 64 is apart from end mould 0.6-1.5m;It is provided between the first filling concrete hole 51 and the second filling concrete hole 52
Second circular hole 62;The 3rd circular hole 63 is provided between second filling concrete hole 52 and the 3rd filling concrete hole 53.By flange 612
It is fixed on the first circular hole 61, the second circular hole 62, the 3rd circular hole 63 and the 4th circular hole 64;In the Side Templates of lining trolley a mono-
12 top peephole 121, peephole are used to observe concrete perfusion slip casting situation.
It is main injected hole wherein close to construct first circular hole 61 at end of vault template 11, with flange 612 by the first Grouting Pipe
611 are fixed in the first circular hole 61;First circular hole 61 is main injected hole the second circular hole 62, the 3rd circular hole 63, the 4th circular hole
64 are used as peep hole or standby injected hole.
It is solid by installing in time when two lining concrete constructions close to an end, and before two lining concrete blindings are not removed
The first Grouting Pipe 611 in the first circular hole is scheduled on, concrete is carried out to the hole on two lining concrete vaults, interlayer and position of coming to nothing
Slip casting, while slip casting turgor is observed by the second circular hole 62, the 3rd circular hole 63, the 4th circular hole 64.
The first described Grouting Pipe:First coagulation Grouting Pipe 611 is inserted into the flange 612 at the top of vault template 11,
Make top set reeded first Grouting Pipe 611 tube head withstand splash guard 4 after, the outer of vault template 11 the first coagulation note
Starch on pipe 611 mark first with outside vault template 11 along, for detecting whether lining thickness meets to require;Article 2 line is
Length 4.3cm+the 2cm of 11 outers of vault template+locating sleeve 614, the i.e. cutting length of the first Grouting Pipe 611.
Described Combined pipe adapter:The upper end of ball valve 616 is arranged under the first pipe joint 611 by connecting tube 615
Termination, the upper end of the first pipe joint 611 are set to groove type cross piece;The upper end of second pipe joint 617 is arranged on ball valve 616
On the tube head of lower end, pressure gauge C is arranged on the second pipe joint 617, and reduction nipple 619 is arranged on the lower end of the second pipe joint 617
Head, form combined type conveying tube joint.
The tunnel vault band mould grouting construction method of the present invention, its grouting construction method step are as follows:
Step 1:Lining trolley a is arranged on after being secured in position in the tunnel excavated on the track of ground surface platform, by slip casting one processed
Body machine 8 is placed in the ground surface platform of lining trolley a bottoms, and delivery pipe b both ends are connected to reduction nipple 619 and slip casting processed
All-in-one 8 discharges on the mouth of pipe;
Step 2:Ready Grouting Pipe or blast pipe are measured by carrying out " trying on " at preformed hole at the top of chassis.In vault
First line of mark in first Grouting Pipe 611 of the outer of template 11, for detecting whether lining thickness meets the requirements;From vault mould
The length of 11 outers of plate+locating sleeve 614(4.3cm)+ 2cm draws the cutting length of Article 2 graticule, i.e. the first Grouting Pipe 611;
Step 3:The fixed Grouting Pipe of installation:After the Grouting Pipe of well cutting is penetrated into the first circular hole in vault template 11, flange is used
612 are fixed on the first Grouting Pipe 611 in the first circular hole 61 in vault template 11;
Step 4:Observation judges to coagulate native slip casting or situation of rushing to summit in vault template, according to the sequential observation coagulation of fill orifice
Native injected hole(Peep hole)Pulp situation, the concrete grouting checked in vault template or situation of rushing to summit judge vault template
Inside whether fill concrete grout;
Step 5:Prepare special filling mortar:Using special slurrying slip casting all-in-one 8, special filling mortar is prepared as mixed
Native grout material is coagulated, special filling mortar is as grout material(In the ratio of water to material of configuration:Water:Fill mortar=18:100(Weight ratio),
Separately add 0.08% micro-expanding agent;Cement preferably uses portland cement;Injecting paste material requires continuous mixing, is strictly supervised during mixing
Control every material usage, it is ensured that grouting quality;
Step 6:Start slip casting all-in-one slip casting processed, start slip casting one slip casting machine 8 processed, observe the second circular hole the 62, the 3rd successively
The circular hole 64 of circular hole 63 and the 4th(It is used as steam vent simultaneously)Whether institute concrete grouting is flowed out, when other peep holes flow out concrete
When slip casting reaches the concrete mortar of equal densities, note concrete grout is immediately finished, the circular hole is closed.Work as pressure gauge
617 reach 1.0MPa, and concrete grouting is not flowed out in aperture yet, should change next injected hole and carry out slip casting, until middle the
Peephole 121 on two circular holes 62, the 3rd circular hole 63 and the 4th circular hole 64 and the termination of template 12 stops when flowing out concrete grout 3-5s
Only slip casting;
Step 7:Slip casting terminates, and is unloaded from the pulp mouth of pipe and the tail end mouth of pipe of reduction nipple 619 of slip casting all-in-one slip casting 8 processed
Lower concrete grouting delivery hose b, slip casting pore is blocked, after concrete slurry initial set, locating flange 613 is laid down, goes to down
One hole slip casting.
Claims (1)
1. tunnel vault band mould grouting construction method, it is characterized in that:Its method and step is as follows:
Step 1:Assembling lining trolley is arranged on after being secured in position on the track of tunnel ground, slip casting all-in-one processed is placed on
In the ground surface platform of lining trolley bottom, the both ends of delivery hose are connected to reduction nipple and slip casting all-in-one discharge nozzle processed
On mouth;
Step 2:Grouting Pipe cutting length is determined, by ready Grouting Pipe or blast pipe by entering at preformed hole at the top of chassis
Row " trying on " measures.First line of mark in the first Grouting Pipe of vault template outer, for detecting whether lining thickness accords with
Close and require;Article 2 graticule, i.e. the blanking length of the first Grouting Pipe are drawn from vault template outer+locating sleeve length 4.3cm+2cm
Degree;
Step 3:The fixed Grouting Pipe of installation:, will with flange after the Grouting Pipe of well cutting is penetrated into the first circular hole in vault template
First Grouting Pipe is fixed in the first circular hole in vault template;
Step 4:Observation judges to coagulate native slip casting or situation of rushing to summit in vault template:According to the sequential observation coagulation of fill orifice
The pulp situation of native injected hole or peep hole, the concrete grouting checked in vault template or situation of rushing to summit, judge vault template
Inside whether fill concrete grout;
Step 5:Prepare special filling mortar:Using special slurrying slip casting all-in-one, special filling mortar is prepared as coagulation
Native grout material, the grout material weight ratio of configuration are:Water:Fill mortar=18:100, separately add 0.08% micro-expanding agent;Cement preferably uses
Portland cement;Injecting paste material requires continuous mixing, strictly monitors every material usage during mixing, it is ensured that grouting quality;
Step 6:Slip casting:Start slip casting all-in-one processed, observe the second circular hole, the 3rd circular hole and the 4th circular hole successively, while arrange
Stomata, for whether flowing out noted concrete grout, when other peep holes outflow concrete grouting reaches the concrete of equal densities
During slurry, note concrete grout is immediately finished, the circular hole is closed;When pressure gauge reaches 1.0MPa, aperture is not flowed out mixed yet
Native slip casting is coagulated, next injected hole should be changed and carry out slip casting again, until middle second circular hole, the 3rd circular hole and the 4th circular hole and mould
Peephole on the termination of plate 12 stops slip casting when flowing out concrete grout 3-5s;
Step 7:Slip casting terminates, and concrete is unloaded from the pulp mouth of pipe and the reduction nipple tail end mouth of pipe of slip casting all-in-one processed
Slip casting delivery hose, slip casting pore is blocked, after concrete grouting initial set, locating flange is laid down, goes to next hole slip casting.
Priority Applications (1)
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CN201610706453.5A CN107762532B (en) | 2016-08-23 | 2016-08-23 | Tunnel vault band mould grouting construction method |
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CN201610706453.5A CN107762532B (en) | 2016-08-23 | 2016-08-23 | Tunnel vault band mould grouting construction method |
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CN107762532A true CN107762532A (en) | 2018-03-06 |
CN107762532B CN107762532B (en) | 2019-03-01 |
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Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108316950A (en) * | 2018-03-18 | 2018-07-24 | 中铁十九局集团第三工程有限公司 | Tunnel vault concrete belt mould backfills filling system and its grouting method |
CN108506028A (en) * | 2018-05-30 | 2018-09-07 | 中铁十九局集团第六工程有限公司 | A kind of tunnel lining trolley vault comprehensive grouting pipe device and its application method |
CN108625878A (en) * | 2018-05-14 | 2018-10-09 | 北京铁科首钢轨道技术股份有限公司 | A kind of technique for solving the problems, such as tunnel-liner vault and coming to nothing |
CN109026069A (en) * | 2018-08-17 | 2018-12-18 | 中铁隧道集团四处有限公司 | Band mould grouting system |
CN109555538A (en) * | 2019-01-04 | 2019-04-02 | 中铁十局集团第四工程有限公司 | A kind of tunnel double-lining vault exhaust is excessive to starch grouting device and its application method |
CN109707401A (en) * | 2018-11-13 | 2019-05-03 | 中铁隆工程集团有限公司 | A kind of tunnel double-lining vault backfill grouting process and Grouting Pipe |
CN109798129A (en) * | 2019-01-11 | 2019-05-24 | 中铁十一局集团第四工程有限公司 | A kind of tunnel double-lining concrete is automatically inserted into formula tamping equipment |
CN110130937A (en) * | 2019-06-06 | 2019-08-16 | 涪特智能装备(重庆)有限公司 | A kind of tunnel construction trolley |
CN110259449A (en) * | 2019-07-16 | 2019-09-20 | 太原理工大学 | A kind of super high seam strip-type filling mining method for relying on telescoping steel form |
CN110439592A (en) * | 2019-08-08 | 2019-11-12 | 广东水电二局股份有限公司 | Shield tunnel two serves as a contrast concrete structure and construction method |
CN110966022A (en) * | 2019-12-24 | 2020-04-07 | 中铁隧道局集团有限公司工程试验分公司 | Railway tunnel lining construction method based on medium-high fluidity concrete |
CN111156029A (en) * | 2019-09-21 | 2020-05-15 | 保定市宇航机械科技有限公司 | Tunnel secondary lining vault pouring construction device and construction method |
CN111206942A (en) * | 2020-02-11 | 2020-05-29 | 夏玉军 | Full-automatic construction structure and method for repairing tunnel crack by biological slurry |
CN113123810A (en) * | 2021-05-12 | 2021-07-16 | 中交路桥建设有限公司 | Construction method for improving grouting effect of arch crown with mold of tunnel |
CN113374504A (en) * | 2021-07-29 | 2021-09-10 | 中铁隧道集团一处有限公司 | Assembling construction method for prefabricated pipe pieces at tunnel arch part |
CN113898381A (en) * | 2021-10-09 | 2022-01-07 | 中铁二十三局集团第四工程有限公司 | Grouting method for prestressed lining |
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CN204098928U (en) * | 2014-05-14 | 2015-01-14 | 中铁二十一局集团第三工程有限公司 | Tunnel vault two serves as a contrast the location pre-embedded device of front Grouting Pipe |
CN204877497U (en) * | 2015-07-09 | 2015-12-16 | 中铁十二局集团有限公司 | Positioner is reserved in tunnel lining slip casting pore |
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Cited By (27)
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CN108316950A (en) * | 2018-03-18 | 2018-07-24 | 中铁十九局集团第三工程有限公司 | Tunnel vault concrete belt mould backfills filling system and its grouting method |
CN108625878A (en) * | 2018-05-14 | 2018-10-09 | 北京铁科首钢轨道技术股份有限公司 | A kind of technique for solving the problems, such as tunnel-liner vault and coming to nothing |
CN108506028A (en) * | 2018-05-30 | 2018-09-07 | 中铁十九局集团第六工程有限公司 | A kind of tunnel lining trolley vault comprehensive grouting pipe device and its application method |
CN109026069A (en) * | 2018-08-17 | 2018-12-18 | 中铁隧道集团四处有限公司 | Band mould grouting system |
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