CN116427966A - Safe and rapid construction structure and construction method of broken rock mass tunnel - Google Patents
Safe and rapid construction structure and construction method of broken rock mass tunnel Download PDFInfo
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- CN116427966A CN116427966A CN202310610216.9A CN202310610216A CN116427966A CN 116427966 A CN116427966 A CN 116427966A CN 202310610216 A CN202310610216 A CN 202310610216A CN 116427966 A CN116427966 A CN 116427966A
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- 238000010276 construction Methods 0.000 title claims abstract description 56
- 239000011435 rock Substances 0.000 title claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 216
- 239000010959 steel Substances 0.000 claims abstract description 216
- 239000004567 concrete Substances 0.000 claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 8
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 9
- 239000011378 shotcrete Substances 0.000 claims description 8
- 239000006260 foam Substances 0.000 claims description 6
- 239000011376 self-consolidating concrete Substances 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 230000006378 damage Effects 0.000 abstract description 3
- 238000011900 installation process Methods 0.000 abstract description 2
- 238000009412 basement excavation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- E21D11/14—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
-
- 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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- 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
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
-
- 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)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a safe and rapid construction structure of a broken rock mass tunnel and a construction method thereof, wherein the safe and rapid construction structure comprises a plurality of assembled steel corrugated plates and steel arches; the steel corrugated plate is arranged at the arch part of the tunnel, and the steel arch frame is arranged at the side wall and the inverted arch part in the tunnel; the steel corrugated plates are fixedly connected with the steel arch through the connecting component; arranging a reinforcing mesh and longitudinal connecting reinforcing steel bars in the area where the steel arch is located, and spraying concrete to the area; the steel corrugated plate and the steel arch are fixedly connected with the full-ring steel arch. According to the invention, the steel corrugated plate is arranged on the arch part to replace the traditional steel arch frame structure, and the steel corrugated plate and the steel arch frame are effectively combined to form the combined structure, so that the safety damage of the arch part falling block to an installer in the installation process can be avoided, and the advantages of the two structures can be fully exerted.
Description
Technical Field
The invention belongs to the technical field of tunnel support, and particularly relates to a safe and rapid construction structure and a construction method of a broken rock mass tunnel.
Background
With the development of the underground engineering technology to the safe and rapid direction, the construction process of the tunnel primary support steel frame becomes a working procedure with higher current construction risk.
The prior primary support steel arch frame has the following defects:
1) The installation of steelframe still adopts the mode of manual installation generally, and arch surrounding rock exists the piece risk of falling in the bow member installation, and the workman has the injury and leads to the risk of death.
2) After the steel arch is installed, the sprayed concrete construction is carried out, the backfill amount of the arch part is large, the construction loss is large, the construction time is long, and the construction speed is delayed.
3) The arch centering installation machine can accelerate the installation, but in a complex geological section, the adaptability of the arch centering installation machine is not strong, and the price is high.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a safe and rapid construction structure and a construction method of a broken rock tunnel, so as to solve the problems of safety risk, low construction speed and high cost of the existing primary support steel frame.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first aspect, a safe and rapid construction structure for a broken rock tunnel comprises a plurality of assembled steel corrugated plates and steel arches; the steel corrugated plate is arranged at the arch part of the tunnel, and the steel arch frame is arranged at the side wall and the inverted arch part in the tunnel;
the steel corrugated plates are fixedly connected with the steel arch through the connecting component; arranging a reinforcing mesh and longitudinal connecting reinforcing steel bars in the area where the steel arch is located, and spraying concrete to the area; the steel corrugated plate and the steel arch are fixedly connected with the full-ring steel arch.
Further, the steel arch is a steel arch, and the steel arch is fast fixed with surrounding rock through a foot locking anchor rod or an anchor pipe.
Further, a plurality of anchor rod holes are reserved in the steel corrugated plate, and the steel corrugated plate is fixed on surrounding rock through installing anchor rods in the anchor rod holes.
Further, the connecting assembly comprises a connecting transverse plate and a flange; the flange is welded at the end part of the steel corrugated plate, and the connecting transverse plate is welded at the end part of the steel arch; the connecting transverse plate is fixedly connected with the flange through bolts.
Further, the full ring steel arch and the steel arch are sealed by welding, and concrete is sprayed on the surface of the steel arch.
Further, the full-ring steel arch is welded with the steel corrugated plates, and gaps between the steel corrugated plates and surrounding rocks are filled by grouting or pouring self-compacting concrete after the back of the steel corrugated plates.
In a second aspect, a construction method of a safe and rapid construction structure for a broken rock tunnel includes the following steps:
s1, excavating a tunnel according to a designed section shape;
s2, designing parameters of the steel corrugated plate and the steel arch;
s3, splicing the steel corrugated plates on site, and lifting the steel corrugated plates to a rack by adopting a forklift or a steel frame mounting machine after splicing the steel corrugated plates into a whole ring section, and supporting the steel corrugated plates based on four lifting jacks;
s4, installing the steel arch frame at the side wall part, and fixing the steel arch frame through a foot locking anchor rod or an anchor pipe;
s5, during side wall installation, anchor rod operation is performed through protection of the steel corrugated plates, and drilling operation and anchor rod installation are performed through anchor rod holes reserved in the steel corrugated plates;
s6, driving the jacking jack to lift the steel corrugated plate to reach the designed height, connecting the steel frame and the steel corrugated plate through the connecting component, and welding and fixing the anchor rod and the steel corrugated plate;
s7, arranging a reinforcing mesh and longitudinal connecting reinforcing steel bars in the area of the steel arch support, and performing concrete spraying operation on the area until the designed thickness of sprayed concrete is reached;
s8, repeating the steps S3-S7 until the length of a section of the longitudinal design of the assembled steel corrugated plate is reached;
s9, constructing a full-ring steel frame, and respectively welding and sealing the full-ring steel arch with the steel arch and the steel corrugated plate;
and S10, grouting or pouring self-compacting concrete through grouting holes or pouring openings reserved in the steel corrugated plates so as to fill the space between the steel corrugated plates and surrounding rocks.
Further, parameters of the steel corrugated plate include span, waveform, plate thickness, circumferential direction and longitudinal width of the steel corrugated plate; the steel arch parameters include the type of steel arch and the spacing between the longitudinal directions.
Further, the grouting in the step S10 is cement slurry or polyurethane polymer foam filling material.
Further, when in the stratum which is easy to be exploded, the foam or rubber layer is stuck on the upper surface of the steel corrugated plate.
The safe and rapid construction structure and the construction method of the broken rock tunnel provided by the invention have the following beneficial effects:
according to the invention, the steel corrugated plate is arranged on the arch part to replace the traditional steel arch frame structure, and the steel corrugated plate and the steel arch frame are effectively combined to form the combined structure, so that the safety damage of the arch part falling block to an installer in the installation process can be avoided, and the advantages of the two structures can be fully exerted.
The steel corrugated plate is prefabricated in a factory, assembled on site and formed by one-step installation, the quality of the structure can be effectively ensured, the on-site construction is facilitated, and the construction efficiency is improved; and the steel corrugated plate belongs to a flexible structure, can effectively resist the rock burst impact effect, and has remarkable effect in the safety construction of strong rock burst areas.
According to the arch steel corrugated plate, the sprayed concrete support is not adopted, so that the construction time of the sprayed concrete is effectively shortened, and the work efficiency is greatly improved; and the steel corrugated plate and the anchor rod can effectively form a combined supporting structure, and the combined supporting structure has positive significance for the safety of a tunnel structure in a complicated geological section.
Drawings
FIG. 1 is a schematic view of the tunnel assembly structure of the present invention.
Fig. 2 is a schematic diagram of a connection structure of a tunnel steel corrugated plate and a steel arch according to the invention.
FIG. 3 is a schematic diagram of the tunnel construction method of the present invention.
1, a steel corrugated plate; 2. surrounding rock excavation surface; 3. filling above the steel corrugated plate; 4. a steel arch; 5. spraying concrete; 6. a connection assembly; 7. a steel frame connecting piece; 8. a stand; 9. a jack is jacked; 10. an anchor tube; 11. a bolt; 31. a flange; 32. a connecting transverse plate; 33. and (5) a bolt.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
Example 1
Referring to fig. 1, this embodiment provides a safe and rapid construction structure of a broken rock mass tunnel, and this implementation is through the combination of a steel corrugated plate 1 and a steel arch 4 to ensure the safety of an installer during construction, which specifically includes:
the steel corrugated plates 1 and the steel arches 4 are fixedly connected by adopting a connecting component 6, so that a combined supporting structure for rapid support is formed;
referring to fig. 2, the connection assembly 6 includes a connection cross plate 32 and a flange 31; the flange 31 is welded to the end of the steel corrugated plate 1, and the connecting cross plate 32 is welded to the end of the steel arch 4; the connecting transverse plate 32 is fixedly connected with the flange 31 through a plurality of high-strength bolts 33;
wherein, steel corrugated plate 1 sets up in the hunch portion in tunnel, and steel corrugated plate 1 includes the prefabricated steel corrugated plate 1 piece of mill, and steel corrugated plate 1 piece passes through the mode of concatenation and makes shaped steel corrugated plate 1 at the job site, and the longitudinal width of steel corrugated plate 1 takes the value according to the design, and this embodiment is 1m ~ 1.5m preferably, and fore-and-aft steel corrugated plate 1 passes through overlap joint or flange 31 connects.
Referring to fig. 3, the length of the steel corrugated plate 1 in one construction longitudinal direction of the present embodiment is determined by the length of one excavation and tunneling, a tunneling construction unit is formed by longitudinally connecting a single sheet, two or three steel corrugated plates 1, after being assembled in a hole, the steel corrugated plates 1 are lifted onto a rack 8 by a forklift or a steel arch 4 installing machine, and are fixed by 4 lifting jacks 9 installed on the rack 8, workers perform construction and positioning of the side wall steel arch 4 under the protection of the steel corrugated plates 1, and after the steel arch 4 is installed in place, the steel corrugated plates 1 are lifted in place by the lifting jacks 9, and the connection operation of the steel corrugated plates 1 and the steel arch 4 is performed.
In this embodiment, the anchor rod 11 holes are reserved on the steel corrugated plate 1, the construction of the anchor rod 11 is carried out after the combined support structure is constructed, and the steel corrugated plate 1 is effectively connected with the anchor rod 11, namely, the steel corrugated plate 1 is fixed on surrounding rock by installing the anchor rod 11 in the anchor rod 11 holes.
After the steel corrugated plate 1 and the steel arch 4 are connected and fixed, a reinforcing mesh and sprayed concrete 5 are arranged in the construction area of the steel arch 4 so as to rapidly seal the surrounding rock excavation surface 2.
The single longitudinal section of the assembled steel corrugated plate 1 is generally set to be 3 times of excavation length or not more than 10m, after the assembled steel corrugated plate 1 completes the construction of one longitudinal section, a full-ring steel arch 4 is arranged, the full-ring steel arch 4 and the steel arch 4 are sealed through welding, concrete 5 is sprayed on the surface of the steel arch 4, and the full-ring steel arch 4 is welded with the steel corrugated plate 1.
After the periphery of the steel corrugated plate 1 of the longitudinal section is completely sealed by sprayed concrete, the gap between the assembled steel corrugated plate 1 and surrounding rock is filled with grouting or pouring self-compacting concrete through reserved grouting holes or concrete pouring openings, so that the close contact of the steel corrugated plate 1 is ensured, such as filling 3 above the steel corrugated plate in fig. 1.
The steel arch 4 is arranged at the side wall and the inverted arch part in the tunnel and is fixed with surrounding rock rapidly through the foot locking anchor rod 11 or the anchor pipe 10; the steel arch 4 of the embodiment is a steel arch 4, preferably I-steel or H-steel, and the longitudinal setting interval of the steel arch 4 can be adjusted according to the level of surrounding rock; the two steel arches 4 can be connected through a steel frame connecting piece 7, the steel frame connecting piece 7 can be a transverse plate, namely, the two transverse plates are connected through bolts 33, so that the two steel arches 4 can be fixedly connected.
The steel arch 4 is provided with a reinforcing mesh and longitudinal connecting steel bars in the area, and concrete 5 is sprayed in the area; the steel corrugated plate 1 and the steel arch 4 are fixedly connected with the full-ring steel arch 4.
Example 2
The embodiment provides a construction method of a safe and rapid construction structure of a broken rock tunnel based on embodiment 1 with reference to fig. 1 to 3, which specifically comprises the following steps:
s1, excavating a tunnel according to a designed section shape;
s2, designing the span, the waveform, the plate thickness, the circumferential direction and the longitudinal width of the steel corrugated plate 1, and designing the model and the longitudinal spacing of the steel arch 4;
s3, splicing the steel corrugated plates 1 on site, and lifting the steel corrugated plates to a construction rack 8 by using a forklift or a steel frame mounting machine after splicing the steel corrugated plates 1 into a whole ring section, wherein 4 lifting jacks 9 are arranged on the rack 8, and the steel corrugated plates 1 are supported and fixed by adopting the lifting jacks 9;
s4, installing a steel arch 4 at a side wall part, and rapidly fixing through a foot locking anchor rod 11 or an anchor pipe 10;
s5, in the process of installing the side wall, a worker on the rack 8 performs anchor rod 11 operation under the protection of the steel corrugated plate 1, and performs drilling operation and installation of the anchor rod 11 through anchor rod 11 holes reserved in the steel corrugated plate 1;
s6, after the steel arch 4 and the anchor rods 11 are installed, driving the jacking jack 9 to lift the steel corrugated plate 1 to the designed height, fixedly connecting the steel arch 4 and the steel corrugated plate 1, and welding and fixing the anchor rods 11 and the steel corrugated plate 1;
s7, arranging a reinforcing mesh and longitudinal connecting reinforcing steel bars in the area supported by the steel arch 4, and performing concrete 5 spraying operation until the designed thickness of the sprayed concrete 5 is reached;
s8, circularly installing, and repeating the steps S3 to S7 until the length of a longitudinal design section of the assembled steel corrugated plate 1 is reached;
s9, constructing a full-ring steel frame, welding the full-ring steel frame and the steel corrugated plate 1, and spraying concrete 5 for sealing;
step S10, grouting or pouring self-compaction concrete is carried out through grouting holes or pouring openings reserved on the steel corrugated plate 1, and the space between the steel corrugated plate 1 and surrounding rock is filled;
the grouting liquid can be cement slurry or polymer foam filling material such as polyurethane.
In the stratum that easily takes place the rock burst, foam or rubber layer should be pasted to steel corrugated plate 1 upper surface, reduces the impact of rock burst to integrated configuration, guarantees personnel's safety.
Although specific embodiments of the invention have been described in detail with reference to the accompanying drawings, it should not be construed as limiting the scope of protection of the present patent. Various modifications and variations which may be made by those skilled in the art without the creative effort are within the scope of the patent described in the claims.
Claims (10)
1. The utility model provides a broken rock mass tunnel safe quick construction structure which characterized in that: comprises a plurality of assembled steel corrugated plates and a steel arch; the steel corrugated plate is arranged at the arch part of the tunnel, and the steel arch frame is arranged at the side wall and the inverted arch part in the tunnel;
the steel corrugated plates are fixedly connected with the steel arch through the connecting component; the steel arch is provided with a reinforcing mesh and longitudinal connecting reinforcing steel bars in the area where the steel arch is located, and concrete is sprayed to the area for operation; and the steel corrugated plate and the steel arch are fixedly connected with the full-ring steel arch.
2. The safe and rapid construction structure of a broken rock tunnel according to claim 1, wherein: the steel arch is a steel arch, and the steel arch is fast fixed with surrounding rock through a foot locking anchor rod or an anchor pipe.
3. The safe and rapid construction structure of the broken rock tunnel according to claim 2, wherein: a plurality of anchor rod holes are reserved on the steel corrugated plate, and the steel corrugated plate is fixed on surrounding rock by installing anchor rods in the anchor rod holes.
4. A broken rock mass tunnel safe and quick construction structure according to claim 3, wherein: the connecting assembly comprises a connecting transverse plate and a flange; the flange is welded at the end part of the steel corrugated plate, and the connecting transverse plate is welded at the end part of the steel arch; the connecting transverse plate is fixedly connected with the flange through bolts.
5. The safe and rapid construction structure of the broken rock tunnel according to claim 4, wherein: the full-ring steel arch and the steel arch are sealed by welding, and concrete is sprayed on the surface of the steel arch.
6. The safe and rapid construction structure of the broken rock tunnel according to claim 5, wherein: the full-ring steel arch is welded with the steel corrugated plates, and gaps between the steel corrugated plates and surrounding rocks are filled with grouting or pouring self-compacting concrete after the back of the steel corrugated plates.
7. A construction method of a safe and rapid construction structure of a broken rock mass tunnel according to any one of claims 1 to 6, comprising the steps of:
s1, excavating a tunnel according to a designed section shape;
s2, designing parameters of the steel corrugated plate and the steel arch;
s3, splicing the steel corrugated plates on site, and lifting the steel corrugated plates to a rack by adopting a forklift or a steel frame mounting machine after splicing the steel corrugated plates into a whole ring section, and supporting the steel corrugated plates based on four lifting jacks;
s4, installing the steel arch frame at the side wall part, and fixing the steel arch frame through a foot locking anchor rod or an anchor pipe;
s5, during side wall installation, anchor rod operation is performed through protection of the steel corrugated plates, and drilling operation and anchor rod installation are performed through anchor rod holes reserved in the steel corrugated plates;
s6, driving the jacking jack to lift the steel corrugated plate to reach the designed height, connecting the steel frame and the steel corrugated plate through the connecting component, and welding and fixing the anchor rod and the steel corrugated plate;
s7, arranging a reinforcing mesh and longitudinal connecting reinforcing steel bars in the area of the steel arch support, and performing concrete spraying operation on the area until the designed thickness of sprayed concrete is reached;
s8, repeating the steps S3-S7 until the length of a section of the longitudinal design of the assembled steel corrugated plate is reached;
s9, constructing a full-ring steel frame, and respectively welding and sealing the full-ring steel arch with the steel arch and the steel corrugated plate;
and S10, grouting or pouring self-compacting concrete through grouting holes or pouring openings reserved in the steel corrugated plates so as to fill the space between the steel corrugated plates and surrounding rocks.
8. The construction method of the safe and rapid construction structure for the broken rock mass tunnel according to claim 7, wherein the construction method comprises the following steps: parameters of the steel corrugated plate comprise span, waveform, plate thickness, circumferential direction and longitudinal width of the steel corrugated plate; the steel arch parameters include the type of steel arch and the spacing between the longitudinal directions.
9. The construction method of the safe and rapid construction structure for the broken rock mass tunnel according to claim 7, wherein the construction method comprises the following steps: the grouting in the step S10 is cement slurry or polyurethane polymer foam filling material.
10. The construction method of the safe and rapid construction structure for the broken rock mass tunnel according to claim 7, wherein the construction method comprises the following steps: when in the stratum which is easy to be exploded, the foam or rubber layer is stuck on the upper surface of the steel corrugated plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310610216.9A CN116427966A (en) | 2023-05-26 | 2023-05-26 | Safe and rapid construction structure and construction method of broken rock mass tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310610216.9A CN116427966A (en) | 2023-05-26 | 2023-05-26 | Safe and rapid construction structure and construction method of broken rock mass tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN116427966A true CN116427966A (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310610216.9A Pending CN116427966A (en) | 2023-05-26 | 2023-05-26 | Safe and rapid construction structure and construction method of broken rock mass tunnel |
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| Country | Link |
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| CN (1) | CN116427966A (en) |
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2023
- 2023-05-26 CN CN202310610216.9A patent/CN116427966A/en active Pending
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