CN117738679A - Construction method of tunnel structure model by drilling and blasting method - Google Patents
Construction method of tunnel structure model by drilling and blasting method Download PDFInfo
- Publication number
- CN117738679A CN117738679A CN202410091093.7A CN202410091093A CN117738679A CN 117738679 A CN117738679 A CN 117738679A CN 202410091093 A CN202410091093 A CN 202410091093A CN 117738679 A CN117738679 A CN 117738679A
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- inner mold
- inverted arch
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- 238000010276 construction Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000005422 blasting Methods 0.000 title claims abstract description 30
- 238000005553 drilling Methods 0.000 title claims abstract description 30
- 239000004567 concrete Substances 0.000 claims abstract description 40
- 230000002787 reinforcement Effects 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 27
- 239000010959 steel Substances 0.000 claims description 27
- 239000002023 wood Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a construction method of a tunnel structure model by a drilling and blasting method, which comprises the following steps: step one, paving a waterproof board; step two, constructing an inverted arch bottom plate; step three, erecting a construction bracket above the inverted arch bottom plate; step four, assembling an inner mold; step five, assembling an end die; step six, placing a reinforcement cage; step seven, an outer mold is erected outside the inner mold and covered with a reinforcement cage; pouring secondary lining concrete into the cavity through the concrete pouring opening; and step nine, the left end and the right end of the waterproof board are unfolded upwards, and the waterproof board is attached and coated outside the secondary lining. The invention adopts the reverse construction method to construct the tunnel structure model by the drilling and blasting method, and is simple, convenient and fast.
Description
Technical Field
The invention belongs to the technical field of tunnel engineering, and particularly relates to a construction method of a tunnel structure model by a drilling and blasting method.
Background
At present, a secondary lining structure of a tunnel is poured by adopting a full-section steel template concrete lining tunnel trolley on a tunnel construction site by a drilling and blasting method. The steel mould lining trolley is a machine for forming tunnel concrete by using a motor to drive a travelling mechanism to drive the trolley to travel and using a hydraulic cylinder and a screw jack to adjust a template in place and receive the template. The construction process flow of the template trolley is as follows: the method comprises the following steps of (1) installing a track before a trolley walks into place; (2) trolley walking and positioning; and (3) standing a mould. Closing a power switch of the template trolley, pressing a starting button of an oil pump motor, enabling a hydraulic station to work, operating a multi-way reversing valve handle by matching with a measuring person, and enabling the shape of the template to meet the construction requirement through adjustment; (4) construction arrangement. Including mechanical configuration and lining cycle time (form removal, form setting, pouring, curing); and (5) pouring concrete. The time from the concrete entering the concrete conveying vehicle to the unloading is not longer than the initial setting time, the concrete is not isolated in the conveying process, if the concrete transported to the pouring site has the isolation phenomenon, secondary stirring is carried out before pouring, symmetrical layered pouring is needed to be noted when the concrete is poured, and the left-right height difference is not more than 0.5 m; and (6) demolding. And (5) demoulding after the concrete is solidified to the quality required by engineering technology. The templates related to the front periphery and the rear periphery of the trolley are removed, and then the hydraulic station is started to work.
The full-section steel template concrete lining tunnel trolley adopted in the tunnel construction site by the drilling and blasting method needs to be customized and lacks an outer mold contacted with a tunnel waterproof plate. When the open tunnel is built, the full-section steel template concrete lining tunnel trolley is provided with an outer mold because the open tunnel is constructed in an open cut site. As long as the tunnel sections are the same, the full section steel template concrete lining tunnel trolley can be reused. When a tunnel structure model of a drilling and blasting method is built in a laboratory, a reduced scale model is generally adopted, and the tunnel structure model is nonstandard. If a full-section steel template concrete lining tunnel trolley is adopted to cast a tunnel model lining, the steel template lining trolley needs special customization, certain period is also needed for processing, the reusability is low, the steel template lining trolley is basically abandoned after being used up, the problems of high manufacturing cost and serious waste are caused, and a construction method for constructing a drilling and blasting tunnel structure model by adopting a simple template to replace the steel template lining trolley is needed.
Disclosure of Invention
The invention aims to provide a construction method of a drilling and blasting method tunnel structure model, which is simple, convenient and fast to construct by adopting a reverse method.
The invention adopts the following technical scheme: a template for a drill-burst tunnel structure model, comprising: an inner mold and an outer mold, wherein:
the internal mold comprises: two first centre form side forms, two second centre form side forms and centre form top mould, wherein:
the first internal mold side molds are vertical plate bodies, are vertically arranged at the left end and the right end of the inverted arch bottom plate, are positioned at the inner sides of reserved steel bars, and are consistent with the front-back trend of the inverted arch bottom plate;
the second inner mold side mold comprises an arc section and a straight line section which are integrally connected up and down; the left end and the right end of each second inner mold side mold are respectively connected with the upper end of the first inner mold side mold at the end of each second inner mold side mold; the width of the second inner mold side mold is consistent with the width of the first inner mold side mold in the front-back direction;
the shape of the inner mold top mold is consistent with that of the tunnel vault, and the left end and the right end of the inner mold top mold are connected with the upper end of the second inner mold side mold at the corresponding end; the width of the second inner mold is consistent with the width of the second inner mold in the front-back direction;
the shape of the outer mold is consistent with that of the inner mold, the outer mold is coaxially covered outside the inner mold, a cavity is formed between the outer mold and the inner mold, and the inner mold is used for applying a drilling and blasting tunnel structure model;
and a concrete pouring opening is formed in the top of the outer die and used for pouring concrete into the cavity.
Further, end molds are arranged at the front end and the rear end of the outer mold and the inner mold and cover the front opening and the rear opening of the cavity.
The invention also discloses a construction method of the tunnel structure model by the drilling and blasting method, which comprises the following steps:
step one, paving a waterproof board: a waterproof board is paved on the ground, and the left-right boundary of the waterproof board exceeds the width of the inverted arch.
Step two, constructing an inverted arch bottom plate: the method comprises the steps of (1) surrounding and assembling a wood template which is vertically arranged on a waterproof board and around the edge of a set inverted arch position, pouring concrete in a surrounding space of the wood template, and removing the wood template after the concrete reaches a specified strength to obtain an inverted arch bottom board; vertical reserved steel bars are reserved at the left end and the right end of the inverted arch bottom plate.
And thirdly, erecting a construction support above the inverted arch bottom plate, wherein the construction support is used for carrying personnel to construct.
Step four, assembling an inner mold:
erecting a first inner mold side mold on the left end of the inverted arch bottom plate and on the inner side of reserved steel bars positioned at the left end, wherein the first inner mold side mold is consistent with the front-back trend of the inverted arch bottom plate; a second inner mold side mold is erected at the upper end of the first inner mold side mold erection; erecting a first inner mold side mold on the inner side of reserved steel bars positioned at the right end of the inverted arch bottom plate, wherein the first inner mold side mold is consistent with the front-back trend of the inverted arch bottom plate; and a second inner mold side mold is erected at the upper end of the first inner mold side mold erection.
And erecting an inner mold top mold at the top, wherein the left end and the right end of the inner mold top mold are connected with the upper ends of the second inner mold side molds at the corresponding ends.
Step five, assembling an end die: and assembling end dies at the front end and the rear end of the inner die, wherein the edges of the end dies are attached to the edges of the inner die.
Step six, placing a reinforcement cage: and hanging a reinforcement cage outside the inner mold and in a set secondary lining space, wherein the lower end of the reinforcement cage is connected with the upper end of the reserved reinforcement.
And seventhly, erecting an outer mold on the outer side of the inner mold and covering the reinforcement cage, wherein the front end and the rear end of the outer mold are connected with the end mold, and a cavity is formed between the outer mold and the inner mold.
And eighth, pouring secondary lining concrete into the cavity through the concrete pouring opening, removing the outer mold and the end mold after the concrete and the reinforcement cage are initially set, and removing the inner mold top mold, the second inner mold side mold, the first inner mold side mold and the construction support in sequence after the secondary lining reaches the set strength.
Further, step eight further includes step nine:
and step nine, the left end and the right end of the waterproof board are unfolded upwards, the waterproof board is covered outside the secondary lining in a fitting manner, and the two ends of the waterproof board are attached to each other at the vault.
Further, in the third and fourth steps, joint strips are laid at the joints between the first inner mold side mold and the inverted arch bottom plate, the joints between the first inner mold side mold and the second inner mold side mold, the joints between the inner mold top mold and the second inner mold side mold, and the joints between the end mold and the first inner mold side mold, the second inner mold side mold, the inner mold top mold and the outer mold.
Further, the inner die and the outer die are made of steel materials.
The beneficial effects of the invention are as follows: 1. a simple steel die is adopted to replace a steel die lining trolley to construct a tunnel model lining structure by a drilling and blasting method; the tunnel model inverted arch bottom plate is constructed by adopting the wood template by adopting the drilling and blasting method, and the template can be reused, is simple and convenient. 2. The whole construction process adopts a reverse construction method to construct a drilling and blasting method tunnel structure model, the construction cost is low, the surface of the constructed tunnel structure is smooth and regular, and the original drilling and blasting method tunnel structure on the construction site can be restored.
Drawings
FIG. 1 is a schematic view of laying a waterproof board, pouring an inverted arch bottom board and erecting a support;
FIG. 2 is a schematic diagram of an inner mold side mold and an inner mold top mold of a tunnel structure model by a drilling and blasting method;
FIG. 3 is a schematic diagram of an integral outer mold and an end mold of a tunnel structure model by a drilling and blasting method;
FIG. 4 is a schematic diagram of a secondary lining reinforced concrete and a pouring port of a tunnel structure model by a drilling and blasting method;
FIG. 5 is a schematic diagram of a tunnel structure model of the drill-burst method;
wherein: 1. a waterproof board; 2. an inverted arch bottom plate; 3. reserving reinforcing steel bars; 4. constructing a bracket; 5. a first inner mold side mold; 6. a second inner mold side mold; 7. an inner mold top mold; 8. an outer mold; 9. end molding; 10. a concrete gate; 11. secondary lining; 12. and (5) primary support.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
The invention discloses a template for a tunnel structure model by a drilling and blasting method, which is shown in figures 2 and 3 and comprises the following steps: an inner mold and an outer mold, wherein:
the internal mold comprises: two first centre form side forms 5, two second centre form side forms 6 and an centre form top form 7, wherein:
the first inner mold side mold 5 is a vertical plate body, is vertically arranged at the left end and the right end of the inverted arch bottom plate 2, is positioned at the inner side of the reserved steel bar 3, and is consistent with the front-back trend of the inverted arch bottom plate 2.
The second inner mold side mold 6 comprises an arc section and a straight line section which are integrally connected up and down; the left end and the right end of each second inner mold side mold 6 are respectively connected with the lower end of each second inner mold side mold 6 and the upper end of the first inner mold side mold 5 at the end of each second inner mold side mold; and the width of the second inner mold side mold 6 in the front-rear direction is identical to that of the first inner mold side mold 5.
The shape of the inner mold top mold 7 is consistent with that of the tunnel vault, and the left end and the right end of the inner mold top mold are connected with the upper end of the second inner mold side mold 6 at the corresponding end; which corresponds to the width of the second inner mold side mold 6 in the front-rear direction.
The outer mold 8 is in the same shape as the inner mold, coaxially covers the outer side of the inner mold and forms a cavity with the inner mold, and the cavity is used for being used for making a tunnel structure model by a drilling and blasting method;
a concrete pouring opening 10 is formed in the top of the outer mold and is used for pouring concrete into the cavity.
End dies 9 are arranged at the front and rear ends of the outer die 8 and the inner die and cover the front and rear openings of the cavity.
The invention also discloses a construction method of the drilling and blasting method tunnel structure model, taking the construction of the drilling and blasting method tunnel structure model with the length of 10m as an example, comprising the following steps:
step one, paving a waterproof board 1: firstly, roughening and cleaning the ground, leveling the ground, paving a waterproof board 1 on the ground, and enabling the width of the waterproof board 1 in the left-right direction to exceed the width of the inverted arch.
Step two, constructing an inverted arch bottom plate 2: and (3) on the waterproof board 1, surrounding and assembling a wood template which is vertically arranged around the edge of the set inverted arch position, pouring concrete in the surrounding space of the wood template, and dismantling the wood template after the concrete reaches the specified strength to obtain the inverted arch bottom board 2. The wood form is adopted because the requirement of the inverted arch bottom plate 2 on the surrounding concrete surface is not high.
In order to make the inverted arch floor 2 and the secondary lining 11 have better integrity, the inverted arch floor 2 is reserved with reserved reinforcing bars 3 which can be connected with a reinforcement cage. Vertical reserved steel bars 3 are reserved at the left end and the right end of the inverted arch bottom plate 2, as shown in fig. 1.
And thirdly, when the strength of the inverted arch bottom plate 2 meets the standard requirement through detection, erecting a construction support 4 above the inverted arch bottom plate 2, wherein the construction support 4 is used for carrying personnel to construct. The height of the upright post of the construction support 4 is from low to high from the left end and the right end to the center, and the cross section is consistent with the shape of a tunnel hole.
Step four, assembling an inner mold:
a first internal mold side mold 5 is erected at the left end of the inverted arch bottom plate 2 and at the inner side of a reserved steel bar 3 at the left end, and the first internal mold side mold 5 is consistent with the front-back trend of the inverted arch bottom plate 2; erecting a second inner mold side mold 6 at the upper end of the first inner mold side mold 5; a first internal mold side mold 5 is erected at the right end of the inverted arch bottom plate 2 and at the inner side of a reserved steel bar 3 at the right end, and the first internal mold side mold 5 is consistent with the front-back trend of the inverted arch bottom plate 2; erecting a second inner mold side mold 6 at the upper end of the first inner mold side mold 5;
an inner mold top mold 7 is erected at the top, and the left and right ends thereof are connected with the upper ends of the second inner mold side mold 6 at the corresponding ends.
The two second inner mold side molds 6 at the left and right ends are bilaterally symmetrical, and the second inner mold side molds 6 at each end are opposite to each other in orientation.
Because of the existence of the construction support 4, if an integral internal mold is used, certain difficulties are caused in positioning and mounting, so that an assembled internal mold is adopted.
Step five, assembling an end die 9: the end mould 9 adopts a steel mould, the end mould 9 is assembled at the front end and the rear end of the inner mould, and the edge of the end mould 9 is attached to the edge of the inner mould.
Step six, hanging the reinforcement cage: independently binding a reinforcement cage, hanging the reinforcement cage outside the inner mold and in a space of a set tunnel structure model after the reinforcement cage is bound, and connecting the lower end of the reinforcement cage with the upper end of a reserved reinforcement 3;
step seven, an outer mold 8 is erected on the outer side of the inner mold and covered with a reinforcement cage, the front end and the rear end of the outer mold 8 are connected with an end mold 9, and a cavity is formed between the outer mold and the inner mold; when the outer mold 8 is erected, the whole outer mold 8 is adopted, and the outer mold 8 is propped open with a concrete pouring opening 10. And sealing rubber strips are paved between the outer die 8 and the inverted arch bottom plate 2, so that the sealing rubber strips are tightly fastened.
And step eight, pouring secondary lining 11 concrete into the cavity through the concrete pouring opening 10, and vibrating by a vibrator. Removing the outer die 8 and the end die 9 after the concrete and the reinforcement cage are initially set; after the secondary lining 11 reaches the set strength, the inner mold top mold 7, the second inner mold side mold 6, the first inner mold side mold 5 and the construction support 4 are removed in sequence. The removed template can be recycled.
And step nine, the left end and the right end of the waterproof board 1 are unfolded upwards, are covered outside the secondary lining 10 in a fitting manner, and the two ends of the waterproof board 1 are attached to each other at the vault. The entire secondary lining 11 is encased by the flashing 1. Finally, primary support 12 is applied to the outside of the flashing 1 of the secondary lining 11. As shown in fig. 4 and 5.
Joint strips are laid at the joint between the first inner mold side mold 5 and the inverted arch bottom plate 2, the joint between the first inner mold side mold 5 and the second inner mold side mold 6, the joint between the inner mold top mold 7 and the second inner mold side mold 6, and the joint between the end mold 9 and the first inner mold side mold 5, the second inner mold side mold 6, the inner mold top mold 7 and the outer mold 8. And then, the two templates are tightly connected by adopting a welding process, so that slurry leakage is prevented.
In the prior art, the tunnel construction site by the drilling and blasting method is firstly constructed with an initial support, namely, firstly erecting a steel arch frame, then hanging a net, and initially spraying concrete to form the initial support, then paving a waterproof board, and finally constructing a secondary lining structure of the tunnel. The construction method of the tunnel structure model of the drilling and blasting method adopts reverse construction, and can restore the tunnel structure of the drilling and blasting method on the construction site, and is simple, easy and convenient.
Claims (6)
1. A template for a tunnel structure model of a drill-burst method, comprising: an inner mold and an outer mold, wherein:
the internal mold comprises: two first centre form side forms (5), two second centre form side forms (6) and centre form top mould (7), wherein:
the first internal mold side molds (5) are vertical plate bodies, are vertically arranged at the left end and the right end of the inverted arch bottom plate (2), are positioned at the inner sides of the reserved steel bars (3), and are consistent with the front-back trend of the inverted arch bottom plate (2);
the second inner mold side mold (6) comprises an arc section and a straight line section which are integrally connected up and down; the left end and the right end of each second inner mold side mold (6) are respectively connected with the upper end of the first inner mold side mold (5) at the end of each second inner mold side mold (6); the width of the second inner mold side mold (6) is consistent with the width of the first inner mold side mold (5) in the front-back direction;
the shape of the inner mold top mold (7) is consistent with that of the tunnel vault, and the left end and the right end of the inner mold top mold are connected with the upper end of the second inner mold side mold (6) at the corresponding end; the width of the second inner mold side mold is consistent with the width of the second inner mold side mold (6) in the front-back direction;
the shape of the outer mold (8) is consistent with that of the inner mold, the outer mold is coaxially covered outside the inner mold, a cavity is formed with the inner mold, and the cavity is used for being used for making a tunnel structure model of a drilling and blasting method;
and a concrete pouring opening (10) is formed in the top of the outer die (8) and used for pouring concrete into the cavity.
2. A template for a tunnel structure model by the drill-burst method according to claim 1, characterized in that end dies (9) are arranged at the front and rear ends of the outer die and the inner die and cover the front and rear openings of the cavity.
3. The construction method of the tunnel structure model by the drilling and blasting method is characterized by comprising the following steps of:
step one, paving a waterproof board (1): paving a waterproof board (1) on the ground, wherein the left-right boundary of the waterproof board (1) exceeds the width of an inverted arch;
step two, constructing an inverted arch bottom plate (2): a, building a wood template which is vertically arranged on the waterproof board (1) in a surrounding manner, wherein the periphery of the edge of the set inverted arch position is surrounded by the wood template, pouring concrete in the surrounding space of the wood template, and dismantling the wood template after the concrete reaches the specified strength to obtain an inverted arch bottom board (2); vertical reserved steel bars (3) are reserved at the left end and the right end of the inverted arch bottom plate (2);
erecting a construction support (4) above the inverted arch bottom plate (2), wherein the construction support (4) is used for carrying personnel to construct;
step four, assembling an inner mold:
a first inner mold side mold (5) is erected at the left end of the inverted arch bottom plate (2) and at the inner side of a reserved steel bar (3) at the left end, and the first inner mold side mold (5) is consistent with the front-back trend of the inverted arch bottom plate (2); erecting a second inner mold side mold (6) at the upper end of the first inner mold side mold (5); a first inner mold side mold (5) is erected at the right end of the inverted arch bottom plate (2) and inside a reserved steel bar (3) positioned at the right end, and the first inner mold side mold (5) is consistent with the front-back trend of the inverted arch bottom plate (2); erecting a second inner mold side mold (6) at the upper end of the first inner mold side mold (5);
erecting an inner mold top mold (7) at the top, wherein the left end and the right end of the inner mold top mold are connected with the upper end of the second inner mold side mold (6) at the corresponding end;
step five, assembling an end die: assembling end dies (9) at the front end and the rear end of the inner die, wherein the edges of the end dies (9) are attached to the edges of the inner die;
step six, placing a reinforcement cage: hanging a reinforcement cage in a space of the set secondary lining (11) at the outer side of the inner mold, wherein the lower end of the reinforcement cage is connected with the upper end of the reserved reinforcement (3);
step seven, an outer mold (8) is erected on the outer side of the inner mold and covered with a reinforcement cage, the front end and the rear end of the outer mold (8) are connected with an end mold (9), and a cavity is formed between the outer mold and the inner mold;
and eighth, pouring secondary lining concrete into the cavity through the concrete pouring opening (10), removing the outer mold (8) and the end mold (9) after the concrete and the reinforcement cage are initially set, and removing the inner mold top mold (7), the second inner mold side mold (6), the first inner mold side mold (5) and the construction support (4) in sequence after the secondary lining (11) reaches the set strength.
4. A method of constructing a tunnel construction model according to claim 3, further comprising, after said step eight, the step nine of:
and step nine, the left end and the right end of the waterproof board (1) are unfolded upwards, the waterproof board is covered outside the secondary lining (10) in a fitting mode, and the two ends of the waterproof board (1) are attached to each other at the vault.
5. The construction method of the tunnel structure model according to the drilling and blasting method of claim 4, characterized in that in the third and fourth steps, joint strips are laid at the joints between the first inner mold side mold (5) and the inverted arch bottom plate (2), the joints between the first inner mold side mold (5) and the second inner mold side mold (6), the joints between the inner mold top mold (7) and the second inner mold side mold (6), and the joints between the end mold (9) and the first inner mold side mold (5), the second inner mold side mold (6), the inner mold top mold (7) and the outer mold (8).
6. The construction method of the tunnel structure model by the drilling and blasting method according to claim 5, wherein the inner die and the outer die (8) are made of steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410091093.7A CN117738679A (en) | 2024-01-23 | 2024-01-23 | Construction method of tunnel structure model by drilling and blasting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410091093.7A CN117738679A (en) | 2024-01-23 | 2024-01-23 | Construction method of tunnel structure model by drilling and blasting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117738679A true CN117738679A (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410091093.7A Pending CN117738679A (en) | 2024-01-23 | 2024-01-23 | Construction method of tunnel structure model by drilling and blasting method |
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| Country | Link |
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| CN (1) | CN117738679A (en) |
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- 2024-01-23 CN CN202410091093.7A patent/CN117738679A/en active Pending
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