CN113187498A - TBM tunnel collapsed cavity backfilling and advanced pipe shed construction method - Google Patents
TBM tunnel collapsed cavity backfilling and advanced pipe shed construction method Download PDFInfo
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- CN113187498A CN113187498A CN202110521151.1A CN202110521151A CN113187498A CN 113187498 A CN113187498 A CN 113187498A CN 202110521151 A CN202110521151 A CN 202110521151A CN 113187498 A CN113187498 A CN 113187498A
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- 238000010276 construction Methods 0.000 title claims abstract description 61
- 238000005553 drilling Methods 0.000 claims abstract description 46
- 239000011435 rock Substances 0.000 claims abstract description 12
- 238000005422 blasting Methods 0.000 claims abstract description 4
- 239000002360 explosive Substances 0.000 claims abstract description 4
- 230000003116 impacting effect Effects 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 239000011440 grout Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 24
- 239000002002 slurry Substances 0.000 claims description 20
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 238000004873 anchoring Methods 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000010790 dilution Methods 0.000 claims description 3
- 239000012895 dilution Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 230000010412 perfusion Effects 0.000 claims 1
- 238000009412 basement excavation Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000005641 tunneling Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
- E21D9/0873—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines the shield being provided with devices for lining the tunnel, e.g. shuttering
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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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a TBM tunnel collapsed cavity backfill and advanced pipe shed construction method, which comprises the following steps of firstly, using blasting explosive to cooperate with manual expansion and excavation of a tunnel in a peripheral stratum of the tunnel; after the expanding excavation is finished, installing a pipe shed drilling machine rack and a pipe shed drilling machine in the hole shed drilling machine rack, and finishing the drilling operation on the upper part of the hole chamber; using a pipe shed drilling machine to drill backfill holes in the front collapse cavity, burying backfill pipes and exhaust pipes, and backfilling for three times; then, constructing the pipe shed, and repeatedly impacting the rock mass through a drill bit to form a hole; installing a guide pipe, installing a pipe shed by using a pipe shed drilling machine, and connecting grouting equipment to perform grouting on the constructed pipe shed; during grouting, the hole is pressed into grouting, after the grouting end standard is reached for the first time, pipe following grouting is carried out, the grouting end standard is reached again, and finally the pipe roof grouting construction is finished. According to the invention, innovative technical schemes and detail measures are provided in the aspects of cavity collapse backfill, pipe shed construction and pipe shed grouting construction, so that the construction safety is ensured, and the construction efficiency is improved.
Description
Technical Field
The invention relates to the technical field of civil engineering construction, in particular to a TBM tunnel collapsed cavity backfill and advanced pipe shed construction method.
Background
With the promotion of informatization and the development of intelligent equipment, tunnel engineering for tunneling through TBM is more and more, and although the mechanical construction efficiency is high and manpower is relatively reduced, the construction cost is not low, the fault handling is troublesome, and difficulties caused by poor geological conditions are caused, so that the technology for solving the problem of tunnel tunneling construction difficulty of TBM is imperative for the industry. Therefore, the construction method is particularly suitable for solving the problem that the cavity collapse occurs in the TBM tunneling tunnel.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a TBM tunnel collapsed cavity backfill and advanced pipe shed construction method, which can overcome the defects of the prior art.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
a TBM tunnel collapsed cavity backfill and advanced pipe shed construction method comprises the following steps:
s1, in the peripheral stratum of the tunnel at the shield tail of the shield, expanding and excavating the tunnel manually by using silent blasting explosive and an air pick to provide a working room for a subsequent drilling machine;
s2, after the drilling machine workshop is excavated, installing a pipe shed drilling machine rack and a pipe shed drilling machine in the workshop, and rotating a cantilever beam through an arch frame assembler to drive the drilling machine to rotate so as to complete drilling operation within 120 degrees of the upper part of the cavern;
s3, using an installed pipe shed drilling machine to drill backfill holes from the tail part of the shield to the front collapsed cavity, embedding backfill pipes and exhaust pipes, and backfilling by adopting light concrete three times within the estimated range of the collapsed cavity;
s4, constructing the pipe shed by using the partition holes, replacing a pipe shed drilling machine corresponding to the pipe shed construction, repeatedly impacting a rock body through a drill bit to form holes after replacing and installing the pipe shed drilling machine, then installing a guide pipe, and filling gaps between the hole wall and the rock body by using an anchoring agent after the mould is rechecked to be correct;
s5, after the filler between the guide pipe and the rock wall is finally solidified, installing a pipe shed by using a pipe shed drilling machine, arranging small steel pipes and reinforcing steel bars in the pipe shed for reinforcement, plugging a gap between the pipe shed and the guide pipe by using an anchoring agent, and connecting grouting equipment to perform grouting on the constructed pipe shed after the filler is finally solidified;
s6, when grouting the constructed pipe shed, the principle of first dilution and then concentration is followed, the grouting construction adopts an in-pipe large circulation construction process, the hole opening is pressed into grouting, the exhaust pipe is used for hole washing, exhaust, slurry return and slurry injection, the conditions of slurry leakage and grouting parameters are observed constantly in the grouting process, after the grouting end standard is reached for the first time, pipe following grouting is carried out according to the slurry shielding principle, the grouting end standard is reached again, and finally the grouting construction of the pipe shed is finished.
Further, in step S3, when the tube shed drilling machine is used to drill the backfill hole from the tail of the shield to the front collapsing cavity, the initial drill hole camber angle is 30 °, the secondary drill hole camber angle is 45 °, and light concrete is used to perform backfill in three times.
Further, in step S5, a pipe shed is installed by using a pipe shed drilling machine, the pipe shed is arranged within 120 ° of the crown, and the material is a heat treatment quality-adjusting pipe.
Further, in step S6, when grouting is performed for the pipe shed, the exhaust pipe provided in the pipe shed also serves as a hole washing pipe and a grout injection pipe, and when grouting is performed through the grouting pipe, the grouting pressure increases and the grout consumption is small, but when no grout flows out from the exhaust pipe, press-in grouting is performed through the exhaust pipe.
Further, in step S6, when grouting can be stopped when the grouting end standard is reached, grout needs to be injected to shield grout before closing the grout, the principle of shielding grout is to fill the pipe shed until the pipe shed is full, grout is injected into the pipe shed again after 30min of grout closing, grout is injected by using grout, double-liquid grout is injected to seal the hole after the grouting end standard is reached again, and the grouting valve is closed to complete pipe following grouting.
Further, in step S6, if slurry leakage occurs during the grouting process, the slurry mix ratio and the setting time are adjusted by adding parameters of a regulator, the slurry is gradually changed from thin to thick, and for the phenomena of slurry overflow and slurry leakage, caulking, surface plugging, low pressure, thick slurry, flow limitation, quantity limitation and intermittent pouring are adopted according to the situation for treatment.
Further, in step S6, when the grouting rate of the pipe roof is high and there is no leakage, the grouting is performed by using a stepped pressure-increasing or intermittent pressure-increasing method to balance the grouting pressure and the grouting rate.
Further, in step S6, during grouting construction, the vault is constructed from two ends, grouting construction is performed in two steps, holes of the second step are poured after all holes of the first step are poured, and grouting conditions of the pipe shed are checked according to grouting conditions of the holes of the second step.
The invention has the beneficial effects that: by using the mechanical equipment, the problem of cavity collapse in front of the face is solved, the construction efficiency is high, and the stability of the stratum in front of the face is ensured; during grouting, the air exhaust pipe is used for performing press-in grouting, so that the problem of insufficient grouting is solved; the method provides a more innovative technical scheme and detail measures in the aspects of cavity collapse backfill, pipe shed construction and pipe shed grouting construction, ensures construction safety and improves construction efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic enlarged excavation section of a method for cavity collapse backfill and advanced pipe shed construction of a TBM tunnel according to an embodiment of the present invention.
Fig. 2 is a schematic installation diagram of a drilling machine for a method for cavity collapse backfill and advanced pipe shed construction of a TBM tunnel according to an embodiment of the invention.
Fig. 3 is a schematic diagram of a backfill pipe and an exhaust pipe of a TBM tunnel collapsed cavity backfill and advanced pipe shed construction method according to an embodiment of the invention.
Fig. 4 is a schematic cross-sectional view of pipe shed construction of a method for cavity collapse backfill and advanced pipe shed construction of a TBM tunnel according to an embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of pipe shed construction by a method for cavity collapse backfill and advanced pipe shed construction of a TBM tunnel according to an embodiment of the invention.
Fig. 6 is a schematic diagram illustrating arrangement of pipe shed tendons according to the method for cavity collapse backfill and advanced pipe shed construction of a TBM tunnel according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of pipe shed grouting in a TBM tunnel collapsed cavity backfill and advanced pipe shed construction method according to an embodiment of the present invention.
In the figure: 1. the construction method comprises the following steps of a first working ring, a second working ring, a third working ring, a shield, a third working ring, a cutter head, a first expanding excavation section, a second expanding excavation section, a support section, a third support beam, a cantilever beam, a first support plate, a second arc beam, a first backfill area, a second backfill area, a third exhaust pipe, a backfill pipe, a collapse contour line, a collapsed contour line, a cutter head, a second support plate, a first support plate, a second support plate, a first support plate, a second support plate, a support plate, a support, a.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention, and for the convenience of understanding the above technical solutions of the present invention, the above technical solutions of the present invention are described in detail below by specific use modes.
According to the TBM tunnel collapsed cavity backfill and advanced pipe shed construction method provided by the embodiment of the invention, firstly, a working room is provided for a pipe shed drilling machine, a silent blasting explosive is required to be matched with an air pick to manually expand and dig the tunnel in a tunnel peripheral stratum at the tail of a shield 3, and as shown in figure 1, a working circle I1 in an expansion and excavation range is taken as 124 degrees, and the length indicated by a working circle II 2 is taken as an example.
After the expanding excavation is finished, installing a pipe shed drilling machine rack and a 90A pipe shed drilling machine in a drilling machine workshop, referring to the length of an expanding excavation section 11 and a supporting section 12 as shown in figure 2, fixing the pipe shed drilling machine on a front arc beam 15 and a rear arc beam 17 through a supporting plate 14, a supporting plate II 16 and U-shaped bolts, separating the front part of the pipe shed drilling machine from the front arc beam 15 during movement, fixing the pipe shed drilling machine on a cantilever beam, and rotating the cantilever beam 13 through an arch assembling device to drive the drilling machine to rotate so as to finish the drilling operation on the upper part of the cavern within 120 degrees.
As shown in fig. 3, a 90A pipe shed drilling machine is adopted to drill backfill holes from the tail part of the second shield 28 to the front collapsed cavity consolidated area 210, the initial drill hole camber angle is 30 degrees, the secondary drill hole camber angle is 45 degrees, backfill pipes 25 are embedded in the holes, the backfill pipes 25 are embedded with reference to the collapse contour line 26, exhaust pipes 24 are embedded in the backfill pipes 25, light concrete is adopted to backfill in three times within the estimated range of the collapsed cavities, the backfill pipes are filled into the first backfill area 21, the secondary backfill area 22 and the third backfill area 23, and the collapse contour line 26 comprises the virtual slag 211 of the collapsed cavities.
As shown in fig. 4-6, the pipe shed is constructed by adopting partition holes on the working surface 34, steel pipes 41, steel bars 42 and steel bars 43 are arranged in the pipe shed for reinforcement, a pipe shed drilling machine corresponding to the pipe shed construction is replaced, after the pipe shed drilling machine is installed, a YT-28 drilling machine drill bit is used for repeatedly impacting a rock mass to form holes, then a guide pipe 52 is installed, after the hole wall and the rock mass are rechecked by a mould, a gap between the hole wall and the periphery of the rock mass is blocked by an anchoring agent, after filling materials between the guide pipe 52 and a rock wall are finally set, the pipe shed is installed by a 90A pipe shed drilling machine, the pipe shed is arranged in a top arch within 120 degrees, a heat treatment quality adjusting pipe is selected as a material, after the pipe shed is installed, the gap between the pipe shed and the guide pipe 52 (the rock wall) is blocked by the anchoring agent, the blocking length is not less than 50cm, and after the blocked anchoring agent reaches the final set, grouting equipment is connected to perform grouting on the constructed pipe shed.
If the drilling jamming condition is found in the drilling process, the smooth completion of the pipe shed installation can be ensured by reducing the thrust and increasing the rotating speed.
As shown in fig. 7, when the pipe shed is grouted through the grouting pipe 45 or the grouting pipe two 53, the pipe shed is internally provided with the exhaust pipe two 51 and also serves as a hole washing pipe and a grout injection pipe, the grouting needs to follow the principle of first dilution and then concentration, the grouting construction adopts a pipe-in large-cycle construction process, the hole opening is pressed for grouting, the exhaust pipe 44 or the exhaust pipe two 51 is used for hole washing, exhaust, grout return and grout injection, the grouting process is constantly observed for the situations of grout leakage, grout injection parameters and the like, after the grouting end standard is reached for the first time, the grouting can be stopped, the grouting is carried out before closing the grout, the pipe following grouting is carried out according to the grout shielding principle, after the grouting end standard is reached again, double-fluid grout is injected for hole sealing, and finally the grouting construction of the pipe shed is completed.
In conclusion, by means of the technical scheme, the cavity collapse problem in front of the face is solved by using the mechanical equipment, the construction efficiency is high, and the stability of the stratum in front of the face is guaranteed; during grouting, the air exhaust pipe is used for performing press-in grouting, so that the problem of insufficient grouting is solved; the method provides a more innovative technical scheme and detail measures in the aspects of cavity collapse backfill, pipe shed construction and pipe shed grouting construction, ensures construction safety and improves construction efficiency.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A TBM tunnel collapsed cavity backfill and advanced pipe shed construction method is characterized by comprising the following steps:
s1, in the peripheral stratum of the tunnel at the shield tail of the shield (3), expanding and digging the tunnel manually by using silent blasting explosive and an air pick to provide a working room for a subsequent drilling machine;
s2, after the drilling machine workshop is excavated, installing a pipe shed drilling machine rack and a pipe shed drilling machine in the workshop, and rotating a cantilever beam (13) through an arch truss assembler to drive the drilling machine to rotate so as to complete drilling operation within 120 degrees of the upper part of the cavern;
s3, using an installed pipe shed drilling machine to drill backfill holes from the tail part of the shield (3) to the front collapsing cavity, embedding backfill pipes (25) and exhaust pipes (44), and backfilling by adopting light concrete three times within the estimated range of the collapsing cavity;
s4, constructing the pipe shed by using the partition holes, replacing a pipe shed drilling machine corresponding to the pipe shed construction, repeatedly impacting a rock body through a drill bit to form holes after replacing and installing the pipe shed drilling machine, then installing a guide pipe (52), and filling gaps between the hole wall and the rock body by using an anchoring agent after the mould is rechecked to be correct;
s5, after the filling material between the guide pipe (52) and the rock wall is finally solidified, installing a pipe shed by using a pipe shed drilling machine, arranging small steel pipes and reinforcing steel bars in the pipe shed for reinforcement, plugging a gap between the pipe shed and the guide pipe (52) by using an anchoring agent, and connecting grouting equipment to perform grouting on the constructed pipe shed after the filling material is finally solidified;
s6, when grouting the constructed pipe shed, the principle of first dilution and then concentration is followed, the grouting construction adopts an in-pipe large circulation construction process, the hole opening is pressed into grouting, the exhaust pipe (44) is used for hole washing, exhaust, slurry return and slurry injection, the conditions of slurry leakage and grouting parameters are observed at any time in the grouting process, after the grouting end standard is reached for the first time, pipe following grouting is carried out according to the slurry shielding principle, the grouting end standard is reached again, and finally the grouting construction of the pipe shed is completed.
2. The TBM tunnel collapsed cavity backfilling and advancing pipe shed construction method according to claim 1, wherein in step S3, when a backfill hole is drilled from the tail part of the shield (3) to the front collapsed cavity by using a pipe shed drilling machine, the initial drill hole camber angle is 30 degrees, the secondary drill hole camber angle is 45 degrees, and backfilling is performed three times by using light concrete.
3. The method for cavity-collapsing backfill and advanced pipe shed construction of a TBM tunnel according to claim 1, wherein in step S5, a pipe shed drill is adopted to install the pipe shed, the pipe shed is arranged in a 120-degree range of a top arch, and heat-treatment quality-adjusting pipes are selected as materials.
4. The method for the construction of the TBM tunnel collapsed cavity backfill and the advanced pipe shed as claimed in claim 1, wherein in step S6, when grouting the pipe shed, the exhaust pipe (44) arranged in the pipe shed is used as a hole washing pipe and a grouting pipe, when grouting is performed through the grouting pipe (45), the grouting pressure is increased, the grouting amount is small, but when no grout flows out from the exhaust pipe (44), the pressure grouting is performed through the exhaust pipe (44).
5. The method for TBM tunnel collapsed cavity backfill and advanced pipe shed construction according to claim 1, wherein in step S6, when grouting can be stopped after the grouting end standard is reached, grout needs to be injected for shielding before closing the grout, the principle of shielding the grout is to fill the pipe shed until the pipe shed is full, the pipe shed is grouted again after 30min of grout closing, the grouting is performed by using the grout, double-liquid grout is injected for sealing after the grouting end standard is reached again, a grouting valve is closed, and pipe following grouting is completed.
6. The method for the cavity collapse backfill and the advanced pipe shed construction of the TBM tunnel according to the claim 1, wherein in the step S6, if slurry leakage occurs in the grouting process, the slurry mixing ratio and the setting time are adjusted by adding parameters of regulators, the slurry is gradually changed from thin to thick, and for the phenomena of slurry leakage and slurry leakage, the measures of caulking, surface plugging, low pressure, thick slurry, flow limitation, quantity limitation and intermittent perfusion are adopted according to the situation for treatment.
7. The method for backfill of collapsed cavities and leading pipe sheds in TBM tunnels as claimed in claim 1, wherein in step S6, grouting the pipe sheds with a high grout injection rate and without leakage, grouting by using a staged pressure boosting or intermittent pressure boosting method to balance grouting pressure and injection rate.
8. The method for the cavity collapse backfill and the advance pipe shed construction of the TBM tunnel according to the claim 1, wherein in the step S6, the construction from two ends to the vault is carried out during grouting construction, the grouting construction is carried out in two steps, holes of the second step are poured after all holes of the first step are poured, and the grouting condition of the pipe shed is checked through the grouting condition of the holes of the second step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110521151.1A CN113187498B (en) | 2021-05-13 | 2021-05-13 | TBM tunnel collapsed cavity backfilling and advanced pipe shed construction method |
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| CN202110521151.1A CN113187498B (en) | 2021-05-13 | 2021-05-13 | TBM tunnel collapsed cavity backfilling and advanced pipe shed construction method |
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| CN113187498A true CN113187498A (en) | 2021-07-30 |
| CN113187498B CN113187498B (en) | 2022-11-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113931662A (en) * | 2021-11-05 | 2022-01-14 | 中国水利水电第六工程局有限公司 | Reinforced supporting method for composite supporting arch stress body |
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| CN113187498B (en) | 2022-11-04 |
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