CN105888692A - Method for repairing tunnel inner arch - Google Patents
Method for repairing tunnel inner arch Download PDFInfo
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- CN105888692A CN105888692A CN201610342959.2A CN201610342959A CN105888692A CN 105888692 A CN105888692 A CN 105888692A CN 201610342959 A CN201610342959 A CN 201610342959A CN 105888692 A CN105888692 A CN 105888692A
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- nothing
- come
- grouting
- tunnel
- grouting pipe
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- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims description 33
- 238000007569 slipcasting Methods 0.000 claims description 24
- 239000002689 soil Substances 0.000 claims description 21
- 238000005520 cutting process Methods 0.000 claims description 20
- 230000001771 impaired effect Effects 0.000 claims description 5
- 210000005239 tubule Anatomy 0.000 claims description 3
- 239000011440 grout Substances 0.000 abstract 5
- 239000011800 void material Substances 0.000 abstract 4
- 238000005553 drilling Methods 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 20
- 241000521257 Hydrops Species 0.000 description 10
- 206010030113 Oedema Diseases 0.000 description 10
- 230000007547 defect Effects 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005086 pumping Methods 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
-
- 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
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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a method for repairing a tunnel inner arch, comprising: detecting positions of voiding and inrush passage in a damaged tunnel by using detection radar; drilling a lining surface at a voiding position to obtain a grouting hole, mounting a grouting pipe, extending the grouting pipe into a void, drilling an exit of the inrush passage to obtain a first grouting hole greater than a drilled hole at the exit of the inrush passage in diameter, and hermetically fitting a first grouting pipe in the first grouting hole; grouting the grouting hole and the first grouting hole, detecting grout filling conditions in the void and the inrush passage in real time with the detection radar, and stopping grouting when the grout fills the void and the inrush passage; after the grout solidifies and final strength forms, making a plurality of longitudinal and transverse slots extending from outline to periphery on the lining surface; filling all the slots with grout, and solidifying the grout; fixing and reinforcing the void and peripheral adjacent parts, and discharging accumulated water in the inrush passage.
Description
Technical field
The present invention relates to a kind of tunnel defect restorative procedure, it is possible to arch in tunnel is come to nothing and the disease such as infiltration is repaired.
Background technology
Along with being continuously increased of highway in China and railway mileage, tunnel quantity increases the most year by year, increase along with the tunnel service time, various tunnel defects affect the safety in tunnel, wherein coming to nothing and seeping water is the impact most important two kinds of diseases of safety, comes to nothing and refers to that tunnel-liner and water proof interlayer come to nothing, come to nothing between water barrier and preliminary bracing, come to nothing and come to nothing at the bottom of plate and between inverted arch between preliminary bracing and country rock.Forming the region come to nothing to threaten the fixing formation of the lining cutting in tunnel, finding and eliminate above-mentioned region of coming to nothing the most in time becomes the steps necessary of tunnel maintenance.
China Patent No. be CN102052081 document in disclose a kind of tunnel and come to nothing the technology of Defects Treatment and construction method, above-mentioned tunnel is come to nothing and utilizes high polymer to carry out slip casting filling, thus eliminate above-mentioned coming to nothing；But, place's surrounding of coming to nothing typically there is also the soil layer in addition to place of coming to nothing or rock stratum loosens, just can cause above-mentioned coming to nothing, said method only fixes soil layer or the rock stratum at place of coming to nothing in place's slip casting of coming to nothing in tunnel, still may can loosen because of the soil layer of surrounding or rock stratum from now on and cause phenomenon of coming to nothing the most in this place.
Pore gas flow is mainly due to the osmosis by subsoil water, the waterproof and pumping equipment imperfection of lining cutting, and subsoil water can penetrate water barrier and the lining cutting in tunnel, flow out from lining cutting surface, due to the souring of water, the crack at permeable place can be more and more wider, finally causes lining cutting avalanche.
China Patent No. be CN102108873 document in disclose the quick administering method of a kind of percolating water, but the method essentially consists in and seepage mouth and water gushing channelway is blocked, the water in water gushing channelway is not completely exhausted out, stay the part hydrops in water gushing channelway that the soil layer at lining cutting rear or rock stratum can be made to loosen, there is potential risk.
Summary of the invention
The present invention primarily solves the technical problem that and is to provide a kind of tunnel defect restorative procedure, it is possible to coming to nothing and surrounding adjacent regions is fixed strengthening, discharge the hydrops in penetrating passage simultaneously.
In order to solve above-mentioned technical problem, the invention provides a kind of tunnel defect restorative procedure, it comprises the steps:
A. utilize detection radar to detect coming to nothing and the position of water gushing channelway in impaired tunnel, mark the contour line at position of coming to nothing on the surface that interior arch lining is built in detail；
B. the lining cutting surface in described position of coming to nothing carries out boring and obtains injected hole and install Grouting Pipe, Grouting Pipe stretches to this and comes to nothing interior, obtain the diameter injected hole one more than water gushing channelway outlet at water gushing channelway exit bore, in this injected hole one, be sealed with Grouting Pipe one；
C. Grouting Pipe and Grouting Pipe one carried out slip casting and utilizes detection radar to detect the filled therewith situation come to nothing and within water gushing channelway in real time, come to nothing when slurry is full of and stops slip casting during water gushing channelway；
D. detect this again with detection radar after slip casting stops come to nothing and whether also have not by filled therewith position in water gushing channelway, the position that there is above-mentioned situation is re-started boring, slip casting；
The most above-mentioned slurry curing being filled with after reaching final strength, outputs a plurality of cannelure extended around by profile alignment and is at least up to rock-soil layer with transverse groove and the degree of depth on lining cutting surface；
F. utilize tubule filling adaptor to move slip casting in stretching into all cannelures and transverse groove, fill up slurry and solidify.
A diameter of 12mm of described injected hole.
Described cannelure is 3mm with the width of transverse groove, and the degree of depth is beyond depth capacity 10cm come to nothing.
Outermost two cannelures and transverse groove surround contour line and remaining cannelure extended around by this profile alignment and transverse groove.
This slurry is for the slip casting process of described tunnel defect restorative procedure.
This slurry is high intensity foam-type resin.
This slurry is fully cured after injecting 5 minutes, reaches final strength after injecting 10 minutes.
Relative to prior art, what the present invention had has the technical effect that
1) the tunnel defect restorative procedure of the present invention, combined with boring, slip casting by detection radar detection, quickly determine that tunnel comes to nothing and the position of water gushing channelway fill up above-mentioned by slip casting and come to nothing, this is come to nothing and is fixed strengthening, inversely discharged the hydrops in water gushing channelway by slip casing by pressure and make filled therewith water gushing channelway, the method only blocking water gushing channelway in compared to existing technology and do not drain wherein hydrops, it is possible to prevent hydrops from the erosion of ground producing new disease；Then output around this come to nothing position the bar-shaped trough as deep as rock-soil layer on lining cutting surface, slip casting solidifying in this bar-shaped trough, the rock-soil layer that this position surrounding of coming to nothing is adjacent is fixed strengthening, and the slurry of interior solidification that comes to nothing is connected with the slurry in meshed groove, so that this comes to nothing, position and surrounding have the rock-soil layer of loosening trend, water barrier or lining cutting to be connected, the method that in compared to existing technology, position of coming to nothing is strengthened in independent slip casting, its fastness, reliability are higher, decrease this position of coming to nothing and again occur loosening, forming the probability newly come to nothing；
2) described injected hole about 12mm, the middle 16mm injected hole repairing road surface employing, encircles in tunnel higher for Structural strength calls compared to existing technology, and its impact is less；
3) cannelure is 3mm with the width of transverse groove, fluting can be reduced on the impact of arch structure intensity in tunnel, groove depth is beyond depth capacity 10cm come to nothing, after groove is carried out slip casting solidification, the rock-soil layer of surrounding of coming to nothing can not only be strengthened, can also the rock-soil layer of this back side deeper inside of coming to nothing be carried out structure-reinforced, reduce the probability that this position of coming to nothing occurs coming to nothing again further；
4) outermost transverse groove forms network structure with cannelure with its internal transverse groove, cannelure and is connected with coming to nothing, and further increases come to nothing position and the fastening strength of surrounding rock-soil layer after filling paste；
5) this slurry is the most aqueous, will not produce drying shrinkage phenomenon, it is possible to dense packing effect comes to nothing and water gushing channelway；Having pliability after slurry curing with elastic, it is not easy to ftractureing, this resin material has good impermeability simultaneously, can stop the hydrops in rock-soil layer in water gushing channelway penetrates into tunnel, fracture and seam have good sealing function；
6) this slurry is fully cured after injecting 5 minutes, reaches final strength after injecting 10 minutes, and hardening time is short, decrease engineering time and the impact on traffic, forming foaming shape solid after slurry curing, its density is the 10% of cement mortar, lining cutting will not be produced bigger load；
7) elative free swelling ratio of this slurry is up to 20:1, it is possible to Fast Filling comes to nothing, and in expansion process, further compacting is come to nothing and soil layer around water gushing channelway；
8) Stability of Slurry after solidification is strong, is difficult to aging deformation, and its durability is up to a century；
9), after slurry curing, each chemical composition will not be dissolved or decompose and be run off in ground hydrops, environmentally safe；
10) coming to nothing and water gushing channelway after this slurry reparation, the later stage, without periodic maintenance, maintenance, decreases maintenance cost.
Accompanying drawing explanation
In order to understand the innovative principle of the explanation present invention and compared to the technical advantage of existing product, below by way of accompanying drawing by the possible embodiment of the limiting examples explanation of applying described principle.In the drawings:
Fig. 1 is the sectional drawing in impaired tunnel in the present invention；
Fig. 2 is the sectional drawing in the tunnel in the present invention after fluting；
Fig. 3 be the present invention is come to nothing in tunnel place arch lining build surface fluting after front view.
Detailed description of the invention
Embodiment 1
As shown in Fig. 1, impaired tunnel generally comprises: rock-soil layer 1, water barrier 2, lining cutting 3, comes to nothing 4, water gushing channelway 10.
Come to nothing and be generally present between rock-soil layer and water barrier and be likely located at the bottom of tunnel vault, arch side, tunnel or tunnel arch, the trend loosened is there is at the rock-soil layer that the position surrounding come to nothing occurs, it is therefore desirable to come to nothing position and surrounding are fixed strengthening just can make the to come to nothing rock-soil layer of place's surrounding be in shakedown simultaneously, phenomenon of coming to nothing occurs after preventing at this again.
Water gushing channelway typically passes water barrier 2 from the rock-soil layer at lining cutting rear and extends to the surface of lining cutting 3, is interconnected between water gushing channelway, and general multiple water gushing channelway share an infiltration outlet.
As shown in Fig. 1 Yu Fig. 2, the tunnel defect restorative procedure of the present invention, comprise the following steps:
(1) utilize and come to nothing 4 and the position of water gushing channelway 10 in arch lining is built in the impaired tunnel of three-dimensional detection detections of radar, mark the general outline line 5 at 4 positions of coming to nothing on the surface that interior arch lining is built in detail and measure the degree of depth at these 4 positions of coming to nothing；
(2) position of injected hole 6 is marked on the described lining cutting surface coming to nothing position central authorities, at injected hole
The position of 6 carries out holing and install Grouting Pipe 7, a diameter of 12mm of injected hole, and Grouting Pipe 7 stretches to this and comes to nothing in 4；
(3) position of injected hole 1 is marked in water gushing channelway outlet, hole in this position, the diameter of this injected hole one exports slightly larger than water gushing channelway, the degree of depth of injected hole one is 5-10cm, Grouting Pipe 1 is installed in this injected hole one, Grouting Pipe 1 coordinates face to be provided with sealing ring with the bottom of injected hole one, and the outer end of Grouting Pipe 1 is provided with the check valve 12 stoping liquid in pipe outflow；
(4) installing filling adaptor in Grouting Pipe 7, debugging grouting equipment is also connected with filling adaptor and above-mentioned check valve 12, and inspection injecting paste material also adds in grouting equipment；
(4) injected hole 7 and check valve 12 are carried out slip casting and utilize three-dimensional detection radar detect in real time come to nothing 4 and water gushing channelway 10 within filled therewith situation, come to nothing 4 and stop slip casting during water gushing channelway 10 when slurry is full of this；
(5) after slip casting stops again with detection radar detect this come to nothing 4 and water gushing channelway 10 in whether also have not by filled therewith position, the position that there is above-mentioned situation is re-started boring, slip casting；
null(6) after waiting 10 minutes，The above-mentioned slurry curing being filled with also reaches final strength，Then according to the degree of depth come to nothing and mark come to nothing 4 contour line，As shown in Fig. 2 Yu Fig. 3，Lining cutting surface draws a plurality of slotted line and slots with groover，The groove outputed includes a plurality of being parallel to the cannelure 8 of tunnel center line and being perpendicular to the transverse groove 9 of tunnel center line，Superolateral two cannelures 8 in lining cutting surface and two transverse grooves 9 surround described in the contour line that comes to nothing form a rectangle，Remaining cannelure 8 originates in the transverse groove 9 in outside respectively and terminates at contour line 5，Remaining transverse groove 9 originates in the cannelure 8 in outside and terminates at contour line 5，Slotted width is 3mm，Each cannelure 8 and the degree of depth of transverse groove 9 beyond above-mentioned record come to nothing 4 depth capacity 10cm；
(7) utilize tubule filling adaptor to move slip casting in stretching into all cannelures 8 and transverse groove 9, finally above-mentioned all cannelures, transverse groove are all filled up slurry and solidify.
Embodiment 2
Heretofore described slurry uses a kind of high intensity foam-type resin, its model is SZ2, during slip casting, this resin is added in above-mentioned grouting equipment, the resin viscosity flowed out from this grouting equipment is 200 ± 65mPa s, this resin slurry volume in flowing constantly increases, its penetrating power is strong, be suitable to quickly arrive and come to nothing in position or entrance water gushing channelway, under grouting pressure effect, be suitable to the hydrops that is expelled from water gushing channelway and fill this water gushing channelway, it is fully cured after above-mentioned slurry injects 5 minutes, its final strength is reached after injecting 10 minutes, including compressive strength >=
1.5MPa, bending strength >=1.3MPa.
This slurry has the following characteristics that
(1) this slurry is the most aqueous, will not produce drying shrinkage phenomenon, it is possible to dense packing effect comes to nothing and water gushing channelway；Having pliability after slurry curing with elastic, it is not easy to ftractureing, this resin material has good impermeability simultaneously, can stop the hydrops in rock-soil layer in water gushing channelway penetrates into tunnel, fracture and seam have good sealing function；
(2) forming foaming shape solid after slurry curing, its density is the 10% of cement mortar, lining cutting will not be produced bigger load；
(3) elative free swelling ratio of this slurry is up to 20:1, it is possible to Fast Filling comes to nothing, and in expansion process, further compacting is come to nothing and soil layer around water gushing channelway；
(4) Stability of Slurry after solidification is strong, is difficult to aging deformation, and its durability is up to a century；
(5), after slurry curing, each chemical composition will not be dissolved or decompose and be run off in ground hydrops, environmentally safe；
(6) coming to nothing and water gushing channelway after this slurry reparation, the later stage, without periodic maintenance, maintenance, decreases maintenance cost.
Obviously, above-described embodiment is only for clearly demonstrating example of the present invention, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And these spirit belonging to the present invention are extended out obvious change or variation still in protection scope of the present invention among.
Claims (1)
1. arch in tunnel is come to nothing and the method repaired that seeps water by one kind, it is characterised in that comprise the steps:
A. utilize detection radar to detect coming to nothing (4) and the position of water gushing channelway (10) in impaired tunnel, mark the contour line (5) at (4) position of coming to nothing on the surface that interior arch lining is built in detail；
B. the lining cutting surface in described position of coming to nothing carries out boring and obtains injected hole (6) and install Grouting Pipe (7), Grouting Pipe (7) stretches in these come to nothing (4), obtain the diameter injected hole one (11) more than water gushing channelway outlet at water gushing channelway exit bore, in this injected hole one (11), be sealed with Grouting Pipe one (13)；
C. Grouting Pipe (7) and Grouting Pipe one (13) carried out slip casting and utilizes detection radar to detect in real time to come to nothing (4) and filled therewith situation that water gushing channelway (10) is internal, come to nothing (4) when slurry is full of and stops slip casting during water gushing channelway (10)；
D. detect this again with detection radar after slip casting stops come to nothing (4) and whether also have not by filled therewith position in water gushing channelway (10), the position that there is above-mentioned situation is re-started boring, slip casting；
The most above-mentioned slurry curing being filled with after reaching final strength, outputs on lining cutting surface and a plurality of is at least up to rock-soil layer to the cannelure (8) extended around with transverse groove (9) and the degree of depth by contour line (5)；
F. utilize tubule filling adaptor to move slip casting in stretching into all cannelures (8) and transverse groove (9), fill up slurry and solidify；
A diameter of 12mm of described injected hole；Described cannelure (8) is 3mm with the width of transverse groove (9), and the degree of depth is beyond depth capacity 10cm of come to nothing (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610342959.2A CN105888692B (en) | 2014-05-26 | 2014-05-26 | The restorative procedure encircleed in tunnel |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610342959.2A CN105888692B (en) | 2014-05-26 | 2014-05-26 | The restorative procedure encircleed in tunnel |
| CN201410223562.2A CN104033164B (en) | 2014-05-26 | 2014-05-26 | Come to nothing and the harmful method repaired that seeps water to what encircle in tunnel |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410223562.2A Division CN104033164B (en) | 2014-05-26 | 2014-05-26 | Come to nothing and the harmful method repaired that seeps water to what encircle in tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105888692A true CN105888692A (en) | 2016-08-24 |
| CN105888692B CN105888692B (en) | 2018-03-23 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410223562.2A Active CN104033164B (en) | 2014-05-26 | 2014-05-26 | Come to nothing and the harmful method repaired that seeps water to what encircle in tunnel |
| CN201610342959.2A Active CN105888692B (en) | 2014-05-26 | 2014-05-26 | The restorative procedure encircleed in tunnel |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410223562.2A Active CN104033164B (en) | 2014-05-26 | 2014-05-26 | Come to nothing and the harmful method repaired that seeps water to what encircle in tunnel |
Country Status (1)
| Country | Link |
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| CN (2) | CN104033164B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109372543A (en) * | 2018-12-25 | 2019-02-22 | 中铁二院工程集团有限责任公司 | Mangnolia officinalis competent structure and construction method are owed in a kind of tunnel-liner |
| CN109653764A (en) * | 2018-08-15 | 2019-04-19 | 福建陆海工程勘察设计有限公司 | A kind of restorative procedure that water seepage of tunnel stream is white |
| CN109681235A (en) * | 2018-08-15 | 2019-04-26 | 福建陆海工程勘察设计有限公司 | Method for repairing highway tunnel lining cavity with poor surrounding rock |
| CN109707416A (en) * | 2019-01-08 | 2019-05-03 | 重庆市十八土鑫诚灌浆防水工程有限公司 | A kind of method that tunnel waterproofing layer reconstruction is repaired |
| CN110486023A (en) * | 2019-08-16 | 2019-11-22 | 河北鸿锐嘉科技发展有限公司 | Tunnel defect administering method |
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| CN105866148A (en) * | 2016-03-29 | 2016-08-17 | 山东大学 | Simulation test apparatus for dynamically detecting lining damage grouting repairing by using geological radar, and method thereof |
| 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 |
| CN109209439B (en) * | 2018-10-25 | 2020-03-31 | 北京鸿锐嘉科技发展有限公司 | Method for repairing defects of tunnel lining concrete |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105888692B (en) | 2018-03-23 |
| CN104033164B (en) | 2016-07-06 |
| CN104033164A (en) | 2014-09-10 |
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Denomination of invention: Repair methods for tunnel arches Granted publication date: 20180323 Pledgee: Industrial and Commercial Bank of China Danyang Branch Pledgor: JIANGSU DINGTAI ENGINEERING MATERIAL CO.,LTD. Registration number: Y2024980002806 |