CN114033432A - Two-lining crack renovation construction method for plateau high-ground stress tunnel - Google Patents
Two-lining crack renovation construction method for plateau high-ground stress tunnel Download PDFInfo
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- CN114033432A CN114033432A CN202111355230.6A CN202111355230A CN114033432A CN 114033432 A CN114033432 A CN 114033432A CN 202111355230 A CN202111355230 A CN 202111355230A CN 114033432 A CN114033432 A CN 114033432A
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- 238000010276 construction Methods 0.000 title claims abstract description 41
- 238000009418 renovation Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 238000011835 investigation Methods 0.000 claims abstract description 4
- 239000004567 concrete Substances 0.000 claims description 16
- 238000005553 drilling Methods 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000008096 xylene Substances 0.000 claims description 3
- 230000001186 cumulative effect Effects 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims 1
- 238000011065 in-situ storage Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 8
- 238000005336 cracking Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
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- 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
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of tunnel renovation construction, in particular to a secondary lining crack renovation construction method for a plateau high-geostress tunnel. The method comprises the following steps: s1, conducting statistics and investigation on plateau ground stress tunnel cracks, and establishing a secondary crack statistical table; s2, distributing monitoring quantity measuring points at three positions in the tunnel bottom plate area, distributing points on the side walls, the arches and the vault at two sides of the second lining, and distributing points on the bottom plate and the second lining on the same section; s3, observing the field cracks one by one every 7 days, and recording the change of the cracks; s4, treating the cracks under different conditions according to the collected secondary lining cracks; s5, after the crack treatment, the treated crack was continuously observed. The method provides a complete technical scheme for the process from the collection to the treatment of the cracks, the information acquisition is accurate, the scheme is highly targeted, corresponding processing schemes can be provided for different cracks, and the problem of secondary lining cracks of the high-stress tunnel is effectively solved. The method is mainly applied to the aspect of tunnel secondary lining crack treatment.
Description
Technical Field
The invention relates to the technical field of tunnel renovation construction, in particular to a secondary lining crack renovation construction method for a plateau high-geostress tunnel.
Background
A plurality of underground projects such as traffic tunnels, diversion tunnels and the like are vigorously built in China, and a plurality of deep-buried long and large tunnel projects appear. The rock burst disaster problem in the construction process of the Qinghai-Tibet plateau with complex geological environment, active geological structure and extremely high ground stress is more and more prominent. High ground stress contained in the rock mass is released along with the stripping and ejection phenomena of mother rocks along with excavation disturbance, part of the ground stress is not released in the rock mass, after the whole tunnel is communicated, the ground stress of the whole mountain body is redistributed, and structural cracks appear in the pre-construction secondary lining concrete. The accumulation existence of the ground stress and the residual phenomenon of the stress are verified through a ground stress test result, the serious cake phenomenon of a rock body is revealed through on-site coring verification of a secondary lining crack, the complexity and the hysteresis of the occurrence of the rock burst phenomenon are shown through secondary rock burst occurrence after the auxiliary tunnel and the main tunnel are excavated, the process of continuously releasing the ground stress is displayed through monitoring measurement data and the cracking form of the concrete, and the cracking phenomenon is caused by the structural stress of the secondary lining concrete due to the existence of the high ground stress and the long-time stress redistribution phenomenon after the tunnel is communicated.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a two-lining crack renovation construction method for a plateau high-geostress tunnel, which aims at the structural crack damage of different scales of the two linings after the stress of the plateau high-geostress tunnel is redistributed, adopts different renovation treatment measures according to the width, the depth and the structural form of the crack, reduces the secondary disturbance of surrounding rocks to the maximum extent, ensures that the crack does not develop any more with the minimum construction cost, and ensures that a railway tunnel is smoothly laid for traffic.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a secondary lining crack renovation construction method for a plateau high-geostress tunnel comprises the following steps:
s1, conducting statistics and investigation on plateau ground stress tunnel cracks, and establishing a secondary crack statistical table;
s2, distributing monitoring quantity measuring points at three positions in the tunnel bottom plate area, distributing points on the side walls, the arches and the vault at two sides of the second lining, and distributing points on the bottom plate and the second lining on the same section;
s3, observing the field cracks one by one every 7 days, and recording the change of the cracks;
s4, treating the cracks under different conditions according to the collected secondary lining cracks;
s5, after the crack treatment, the treated crack was continuously observed.
In step S1, the statistical information in the statistical table includes the position, direction, length, width, depth of the crack and whether a cross crack occurs.
In the step S2, each section is distributed at 8 points, one group of points is distributed at intervals of 15-20m, observation is recorded once every 7 days, observation lasts for more than 3 months, a tunnel convergence settlement accumulated change map is drawn, a settlement convergence deformation trend is determined by a curve regression method, and whether tunnel deformation is stable or not is determined.
In step S3, the crack width measurement is performed by using a feeler gauge, the crack depth is measured by using a drilling or crack depth detector, the length measurement is performed by using a measuring tape, and the crack width depth measurement must be ensured at the same position of the crack.
In step S3, if the measured data has little or no change, the observation period may be adjusted to 10-15 days/time, and the observation is continued for 3 months, and if the crack of the second liner has no change, the treatment is performed according to the severity of the crack.
In step S4, for a crack whose width is not changed since the natural crack is found and whose width is less than 1mm, a grouting process is performed by drilling along the crack, and the grouting material is epoxy resin slurry, and the slurry ratio is as follows: 6101 epoxy resin: xylene: diluent No. 501: the construction process comprises the steps of preparing construction → arranging holes → drilling holes → punching holes → washing holes with acetone → installing grouting plugs → leakage testing → grouting → stopping grouting → trimming of seam surfaces → cleaning on site → checking traffic, wherein the weight ratio of ethylene diamine is 100: 30-40: 20: 10.
In the step S4, a natural crack is found, a crack having a width of 1 to 3mm and no change in width is found, a core is drilled in the widest part of the crack, if a through crack is disclosed, the core is repaired by local replacement, if a non-through crack is disclosed, the core is repaired by drilling and grouting along the crack, and the construction process is two-lined concrete surface cleaning → drilling → washing of the crack → embedding of the grout pipe → sealing → pressurized water test → grouting → sealing.
In step S4, for a crack with a width not changing since a natural crack is found, the width being greater than 3mm or having a staggered platform, a secondary lining local removal and replacement measure is adopted, a Φ 22 mortar anchor rod with an inward 50cm range of an edge line being L ═ 4m is removed locally, and the longitudinal distance is 1 m.
In the step S4, for the cracks with the width not less than 3mm and the second liner with annular and cross cracks, the cracks are through seams, and the second liner of the plate is removed in a full-ring mode.
Demolishing and remaking by adopting a cannon hammer and a manual pneumatic pick, wherein the demolishing length is not more than 2m each time, symmetrically chiseling from top to bottom from a vault to a side wall, drilling holes at two ends of a second liner and embedding phi 16 connecting steel bars, the distance between the single rows is 25cm, the concrete is embedded into concrete of two adjacent liners, the length of each concrete is 30cm, in order to ensure that the concrete is not extruded by stress any more, demolishing and replacing the remade second liner and adding double-layer phi 25 steel bars, the distance between the steel bars is 25cm, the concrete is constructed by adopting a first-level proportion higher than the original design, and after chiseling of the concrete of the second liner is completed, primary support repairing, waterproof system construction and reinforced concrete construction of the second liner are sequentially carried out according to the construction procedures.
Compared with the prior art, the invention has the beneficial effects that:
by means of the form of the statistical table, information such as the position, the trend, the length, the width and the depth of the crack, whether cross cracks occur and the like is checked and counted, clear and complete grasp of the crack information is facilitated, omission does not occur, and potential safety hazards are caused; the arrangement of the monitoring points can collect the convergence and settlement information of the tunnel and effectively judge the deformation stability of the tunnel; the change condition and change rule of the tunnel crack can be mastered by the regular crack detection, so that the crack can be analyzed; aiming at the cracks under different conditions, a targeted crack treatment scheme is provided, so that the most suitable treatment scheme can be performed on the cracks while manpower and material resources are saved. The method has the advantages of providing a complete technical scheme for the process from the collection to the treatment of the cracks, accurately acquiring information, having strong pertinence of the scheme, providing corresponding processing schemes for different cracks and effectively solving the problem of the cracks of the secondary lining of the high-stress tunnel.
Drawings
FIG. 1 is a schematic view of the construction process of the present invention;
FIG. 2 is a schematic view of the present invention illustrating fracturing along a slot;
fig. 3 is a schematic view of the anchor rod with mortar partially removed and replaced according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, a secondary lining crack renovation construction method for plateau high-geostress tunnel includes the following steps:
s1, conducting statistics and investigation on plateau ground stress tunnel cracks, and establishing a secondary crack statistical table;
s2, distributing monitoring quantity measuring points at three positions in the tunnel bottom plate area, distributing points on the side walls, the arches and the vault at two sides of the second lining, and distributing points on the bottom plate and the second lining on the same section;
s3, observing the field cracks one by one every 7 days, and recording the change of the cracks;
s4, treating the cracks under different conditions according to the collected secondary lining cracks;
s5, after the crack treatment, the treated crack was continuously observed.
Preferably, in step S1, the statistical information in the statistical table includes the position, orientation, length, width, depth of the crack and whether or not a cross crack occurs. The more detailed the statistical information the better. Meanwhile, in the process of checking, the cracks of the two liners are marked, the width of each crack is marked by adopting a measuring mark paster and the length of each crack is marked by spraying paint at two ends, and each independent crack is marked by a number, so that the follow-up continuous observation is facilitated.
Preferably, in step S2, at the point 8 of each section, a group of points are distributed every 15-20m, observation and recording are performed every 7 days for more than 3 months, a tunnel convergence settlement cumulative change map is drawn, a settlement convergence deformation trend is determined by a curve regression method, and whether tunnel deformation is stable or not is determined.
Preferably, in step S3, the crack width measurement is performed by using a feeler gauge, the crack depth is measured by using a drill or a crack depth detector, the length measurement is performed by using a tape measure, and the crack width depth measurement must be ensured at the same position of the crack. The same person is arranged to the greatest extent by measuring personnel, so that artificial measurement errors caused by replacement of the person are avoided, and measured data are registered in time and compared with the data observed in the previous period.
Preferably, in step S3, if there is little or no change in the measured data, the observation period may be adjusted to 10-15 days/time, and the observation is continued for 3 months, and if there is no change in the crack of the second liner, the treatment is performed according to the severity of the crack.
Preferably, in step S4, for a crack having a width not changing since the natural crack was found and having a width smaller than 1mm, a grouting plugging treatment is performed by punching along the crack, an epoxy resin slurry is used as a grouting material, and the slurry ratio is as follows: 6101 epoxy resin: xylene: diluent No. 501: the construction process comprises the steps of preparing construction → arranging holes → drilling holes → punching holes → washing holes with acetone → installing grouting plugs → leakage testing → grouting → stopping grouting → trimming of seam surfaces → cleaning on site → checking traffic, wherein the weight ratio of ethylene diamine is 100: 30-40: 20: 10.
Preferably, in step S4, the natural crack is found to have a width unchanged from the beginning and a width of 1 to 3mm, the hole is drilled and cored at the widest part of the crack, if a through crack is disclosed, the hole is repaired by local replacement, if a non-through crack is disclosed, the hole is drilled and grouting and plugging are performed along the crack, and the construction process is two-lined concrete surface cleaning → drilling → seam washing → embedded grouting pipe → plugging → pressurized water test → grouting → plugging.
Preferably, in step S4, for a crack with a width unchanged since a natural crack is found, a width larger than 3mm or a staggered platform, a secondary lining local removal and replacement measure is adopted, a phi 22 mortar anchor rod with an inward 50cm range of an edge line of 4m is partially removed, and the longitudinal distance is 1 m.
Preferably, in step S4, the second plate liner is removed in a full ring manner for cracks with a width of 3mm or more and annular and cross cracks of the second plate liner, wherein the cracks are through cracks.
Preferably, a gun hammer and a manual pneumatic pick are adopted to remove and rework, the removal length is not more than 2m each time, the materials are symmetrically chiseled from the top to the bottom from the vault to the side wall, phi 16 connecting steel bars are pre-embedded in joints at two ends of two linings, the distance between the single rows is 25cm, the materials are respectively embedded into two adjacent linings of concrete for 30cm, in order to ensure that the materials are not extruded by stress, the two linings of the materials are removed and replaced by double layers of phi 25 steel bars, the distance between the steel bars is 25cm, the concrete is constructed by adopting a first-level proportion higher than the original design, and after chiseling of the two linings of concrete is completed, primary support restoration, waterproof system construction and two-lining reinforced concrete construction are sequentially carried out according to the construction procedures.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (10)
1. A secondary lining crack renovation construction method for a plateau high-geostress tunnel is characterized by comprising the following steps:
s1, conducting statistics and investigation on plateau ground stress tunnel cracks, and establishing a secondary crack statistical table;
s2, distributing monitoring quantity measuring points at three positions in the tunnel bottom plate area, distributing points on the side walls, the arches and the vault at two sides of the second lining, and distributing points on the bottom plate and the second lining on the same section;
s3, observing the field cracks one by one every 7 days, and recording the change of the cracks;
s4, treating the cracks under different conditions according to the collected secondary lining cracks;
s5, after the crack treatment, the treated crack was continuously observed.
2. The secondary lining crack renovation construction method of the plateau high-ground stress tunnel according to claim 1, characterized in that: in step S1, the statistical information in the statistical table includes the position, direction, length, width, depth of the crack and whether a cross crack occurs.
3. The secondary lining crack renovation construction method of the plateau high-ground stress tunnel according to claim 1, characterized in that: in the step S2, points are distributed at intervals of 15-20m at 8 points of each section, observation is carried out once every 7 days for more than 3 months, a tunnel convergence settlement cumulative change graph is drawn, a settlement convergence deformation trend is determined by a curve regression method, and whether tunnel deformation is stable or not is determined.
4. The secondary lining crack renovation construction method of the plateau high-ground stress tunnel according to claim 1, characterized in that: in step S3, the crack width measurement is performed by using a feeler gauge, the crack depth is measured by using a drilling or crack depth detector, the length measurement is performed by using a measuring tape, and the crack width depth measurement must be ensured at the same position of the crack.
5. The secondary lining crack renovation construction method of the plateau high-ground stress tunnel according to claim 1, characterized in that: in step S3, if the measured data has little or no change, the observation period may be adjusted to 10-15 days/time, and the observation is continued for 3 months, and if the crack of the second liner has no change, the treatment is performed according to the severity of the crack.
6. The secondary lining crack renovation construction method of the plateau high-ground stress tunnel according to claim 1, characterized in that: in the step S4, for a crack whose width is not changed since the natural crack is found and whose width is less than 1mm, a grouting plugging process is performed by punching along the crack, and the grouting material is epoxy resin slurry, and the slurry ratio is as follows: 6101 epoxy resin: xylene: diluent No. 501: the construction process comprises the steps of preparing construction → arranging holes → drilling holes → punching holes → washing holes with acetone → installing grouting plugs → leakage testing → grouting → stopping grouting → trimming of seam surfaces → cleaning on site → checking traffic, wherein the weight ratio of ethylene diamine is 100: 30-40: 20: 10.
7. The secondary lining crack renovation construction method of the plateau high-ground stress tunnel according to claim 1, characterized in that: in the step S4, a natural crack is found, a crack having a width of 1 to 3mm and no change in width is found, a core is drilled in situ at the widest part of the crack, if a through crack is disclosed, the core is repaired by local replacement, if a non-through crack is disclosed, the core is repaired by grouting along the crack, and the construction process is two-lined concrete surface cleaning → drilling → crack cleaning → grouting → embedding → grouting pipe → sealing → pressurized water test → grouting → sealing.
8. The secondary lining crack renovation construction method of the plateau high-ground stress tunnel according to claim 1, characterized in that: in step S4, for a crack with a width not changing since a natural crack is found, the width being greater than 3mm or having a wrong platform, a secondary lining local removal and replacement measure is adopted, a Φ 22 mortar anchor rod with an inward 50cm range of an edge line being L-4 m is partially removed, and a longitudinal distance is 1 m.
9. The secondary lining crack renovation construction method of the plateau high-ground stress tunnel according to claim 1, characterized in that: in the step S4, for the cracks with the width not less than 3mm and the second liner with annular and cross cracks, the cracks are through seams, and the second liner of the plate is removed in a full-ring mode.
10. The secondary lining crack renovation construction method of the plateau high-ground stress tunnel according to claim 9, characterized in that: adopting a gun hammer and a manual pneumatic pick to remove and rework, wherein the removal length is not more than 2m each time, symmetrically chiseling from the top to the bottom from the vault to the side wall, drilling holes at two ends of two linings and pre-burying phi 16 connecting steel bars, wherein the single-row interval is 25cm, the lengths of the two linings are respectively 30cm, in order to ensure that stress extrusion is not carried out, removing and replacing the reworked two linings and double-layer phi 25 steel bars, the steel bar interval is 25cm, the concrete is constructed by adopting a first-level proportion higher than the original design, and after chiseling of the two linings is finished, primary support restoration, waterproof system construction and two-lining reinforced concrete construction are sequentially carried out according to the construction procedures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111355230.6A CN114033432A (en) | 2021-11-16 | 2021-11-16 | Two-lining crack renovation construction method for plateau high-ground stress tunnel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111355230.6A CN114033432A (en) | 2021-11-16 | 2021-11-16 | Two-lining crack renovation construction method for plateau high-ground stress tunnel |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02308093A (en) * | 1989-05-24 | 1990-12-21 | Ohbayashi Corp | Reinforcing of rockbed |
| CN106640126A (en) * | 2016-10-11 | 2017-05-10 | 中铁隧道集团有限公司 | Processing method for extremely-high geostress soft rock tunnel arch wall lining cracking damage |
| CN107725086A (en) * | 2017-12-13 | 2018-02-23 | 中国建筑土木建设有限公司 | Reinforcing method for lining non-structural longitudinal cracks |
| CN109653777A (en) * | 2018-12-11 | 2019-04-19 | 中国铁路设计集团有限公司 | A kind of high-speed railway open trench tunnel percolating water and crack area entirety regulation method |
| CN110805455A (en) * | 2019-10-30 | 2020-02-18 | 中国三冶集团有限公司 | Tunnel disease comprehensive treatment method |
| CN111140263A (en) * | 2020-04-02 | 2020-05-12 | 中铁工程设计咨询集团有限公司 | Tunnel concrete lining crack width calculation method and crack treatment method |
| CN112781656A (en) * | 2021-01-18 | 2021-05-11 | 中铁八局集团有限公司 | Method for monitoring safety of intersected existing tunnel during construction of underpass high-speed railway tunnel |
| CN113338952A (en) * | 2021-07-16 | 2021-09-03 | 中铁二十局集团有限公司 | Construction method for large-section tunnel with turnout line led out from railway tunnel |
-
2021
- 2021-11-16 CN CN202111355230.6A patent/CN114033432A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02308093A (en) * | 1989-05-24 | 1990-12-21 | Ohbayashi Corp | Reinforcing of rockbed |
| CN106640126A (en) * | 2016-10-11 | 2017-05-10 | 中铁隧道集团有限公司 | Processing method for extremely-high geostress soft rock tunnel arch wall lining cracking damage |
| CN107725086A (en) * | 2017-12-13 | 2018-02-23 | 中国建筑土木建设有限公司 | Reinforcing method for lining non-structural longitudinal cracks |
| CN109653777A (en) * | 2018-12-11 | 2019-04-19 | 中国铁路设计集团有限公司 | A kind of high-speed railway open trench tunnel percolating water and crack area entirety regulation method |
| CN110805455A (en) * | 2019-10-30 | 2020-02-18 | 中国三冶集团有限公司 | Tunnel disease comprehensive treatment method |
| CN111140263A (en) * | 2020-04-02 | 2020-05-12 | 中铁工程设计咨询集团有限公司 | Tunnel concrete lining crack width calculation method and crack treatment method |
| CN112781656A (en) * | 2021-01-18 | 2021-05-11 | 中铁八局集团有限公司 | Method for monitoring safety of intersected existing tunnel during construction of underpass high-speed railway tunnel |
| CN113338952A (en) * | 2021-07-16 | 2021-09-03 | 中铁二十局集团有限公司 | Construction method for large-section tunnel with turnout line led out from railway tunnel |
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