Large-section high-speed rail tunnel blasting method

Abstract

The invention discloses a large-section high-speed rail tunnel blasting method. The method comprises the following steps: S1, geological exploration measurement: measuring three-dimensional coordinates inside and on the surface of a tunnel by using a precise instrument so as to determine the shape, size and position of a tunnel blasting section; s2, drilling is conducted, specifically, the position of a shot hole is marked according to the excavation contour line and the blasting parameters determined in the S1, and the shot hole is drilled through a drilling machine; s3, explosive charging is conducted, specifically, after drilling is completed, explosive is charged into the shot holes; s4, a safety protection device is arranged; s5, spraying dust fall treatment is conducted, and air purification is achieved; and S6, cleaning after blasting. The safety protection device is arranged, the safety protection device is moved to the position in front of withdrawn personnel and other equipment and is unfolded towards a blasting point, safety protection can be conducted on the personnel and the other equipment, and broken stones flying towards the personnel and the other equipment during blasting are blocked; and the life safety of tunnel constructors and the safety of tunnel construction equipment are better protected.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel blasting, in particular to a large-section high-speed railway tunnel blasting method. Background Art

[0002] With the rapid development of social economy, high-speed railways are playing an increasingly important role in the field of transportation. As an efficient, fast, safe and environmentally friendly means of transportation, high-speed railway travel has become one of the most popular long-distance travel options. When building high-speed railways, when encountering difficult-to-cross elevation obstacles such as watersheds, mountains, and hills, or difficult-to-avoid plane obstacles such as rivers, lakes, and towns, building tunnels is an effective way to overcome these obstacles. Tunnels can allow the line to directly pass through the mountains, reduce the elevation of the line, slow down the slope, and shorten the line length, thereby improving transportation capacity and reducing transportation costs.

[0003] The use of blasting technology during tunnel construction can quickly expand or connect tunnels in a short period of time, especially in hard rock or soft soil areas, where the efficiency of blasting is more significant. In order to meet the operation needs of high-speed railways and provide more space for evacuation and rescue in emergency situations, high-speed railway tunnels usually have larger cross-sections. The blasting of large-section tunnels requires a large amount of explosives, and the blasting vibration is strong, which will produce a large amount of flying rocks. Although the blasting power will be calculated before the blasting, and a safe distance will be given to require existing personnel to evacuate to a relatively safe location, it is still possible to cause harm to personnel evacuated to a safe distance. At present, there is still no targeted and better protective measure for blasting large-section tunnels to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a large-section high-speed railway tunnel blasting method to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A large-section high-speed railway tunnel blasting method comprises the following steps:

[0007] S1. Geological exploration and measurement: Use precision instruments to measure the three-dimensional coordinates of the tunnel interior and surface to determine the shape, size and location of the tunnel blasting section. Determine the blasting parameters based on factors such as tunnel geological conditions and tunnel cross-sectional dimensions. The blasting parameters include the type of explosives, charge, blasthole arrangement and detonation sequence, and determine the construction excavation contour line.

[0008] S2, drilling and arranging blastholes. The blasthole positions are marked according to the excavation contour and blasting parameters determined in S1, and then the blastholes are drilled using a drilling rig. Plum blossom-shaped anchor rods are used for reinforcement during drilling, and then concrete is sprayed on the face for sealing;

[0009] S3, charging, after drilling is completed, the explosives are loaded into the blasthole and necessary plugging is performed;

[0010] S4. Set up safety protection devices. After the charging is completed, relevant personnel will push the safety protection devices into the tunnel and move them in front of the evacuated personnel and other equipment, and then deploy them in the direction of blasting;

[0011] S5, spray dust reduction treatment, after the detonation operation, open the spray system on the safety protection device to spray towards the blasting site to achieve air purification;

[0012] S6. Clean up after blasting: clean up the rubble and debris produced by blasting and prepare for the next round of blasting.

[0013] A safety protection device for a large-section high-speed railway tunnel blasting method comprises a mobile platform, a vertical plate, a first protective plate and a second protective plate, wherein the mobile platform is provided with a vertical plate, and the first protective plate and the second protective plate are respectively provided on both sides of the vertical plate, and the first protective plate and the second protective plate are both hinged and articulated by hinges, and an electric telescopic rod is provided between the first protective plate and the second protective plate, and the cylinder end of the electric telescopic rod is hinged to the vertical plate, and the piston rod end of the electric telescopic rod is hinged to the first protective plate or the second protective plate, and a spray pipe is installed on the first protective plate and the second protective plate, and a nozzle is installed on the spray pipe, and the nozzle is embedded on the first protective plate and the second protective plate, and one end of the spray pipe is connected to a water pipe, and the water pipe is connected to the water outlet end of a water pump installed on the mobile platform.

[0014] As a further solution of the present invention: the mobile platform includes a platform and running wheels, and a total of four running wheels are provided and installed at the bottom of the platform.

[0015] As a further solution of the present invention: support components are installed at the four corners of the mobile platform, and the support components include a threaded sleeve, a threaded rod, a support plate and a crank. The threaded sleeve is embedded in the table plate, and the threaded sleeve is threadedly connected to the threaded rod, and the bottom and top ends of the threaded rod are respectively installed with a support plate and a crank.

[0016] As a further solution of the present invention: a latch groove is provided on the rear surface of the first protective plate and the second protective plate, a latch is provided in the latch groove, and the latch is plugged and matched with a corresponding socket provided on the table plate.

[0017] As a further solution of the present invention: a groove is provided on the front surface of the first protective plate and the second protective plate to facilitate the extension of the nozzle.

[0018] As a further solution of the present invention: handles are installed on both sides of the vertical board.

[0019] As a further solution of the present invention: a mobile power source is installed on the mobile platform, and the mobile power source is electrically connected to the electric telescopic rod and the water pump.

[0020] As a further solution of the present invention: a plurality of nozzles are arranged at equal distances on the spray pipe.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention provides a safety protection device, moves the safety protection device to the front of the evacuated personnel and other equipment and deploys it facing the blasting point, so as to provide safety protection for the personnel and other equipment, block the debris flying toward the personnel and other equipment during blasting, and better protect the life safety of the tunnel construction personnel and the safety of the tunnel construction equipment.

[0023] 2. The safety protection device of the present invention is provided with a spray system, through which the dust blocked by the safety protection device can be sprayed, so that the air around the blasting point can be purified, and the pollution of the blasting to the air in the tunnel can be reduced, thereby improving the air environment in the tunnel and reducing the physical harm to the construction workers in the tunnel.

[0024] 3. The present invention provides a mobile platform and a support assembly. The mobile platform can make it easier for the safety protection device to move in the tunnel, so that the safety protection device can move along with the blasting position, thereby achieving safety protection for the entire tunnel blasting process. The support assembly can improve the stability of the safety protection device during use.

[0025] 4. The electric telescopic rod of the present invention can drive the protective plate to rotate relative to the vertical plate, so that the safety protection device can be unfolded and folded, which is convenient for personnel to enter and exit the tunnel through the safety protection device, and is also convenient for storing the device when not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure is a flow chart of the method of the present invention.

[0027] Figure 2 It is the rear view of the safety protection device used in the present invention.

[0028] Figure 3 It is a schematic diagram of the overall structure of the safety protection device used in the present invention.

[0029] Figure 4 It is a front view of the safety protection device used in the present invention.

[0030] Figure 5 Safety protection device for the present invention Figure 2 A magnified view of the structure at center.

[0031] Figure 6 Safety protection device for the present invention Figure 2 A magnified view of the structure at point B.

[0032] 1. Mobile platform; 101. Table top; 102. Traveling wheels; 2. Vertical board; 3. First protective plate; 4. Second protective plate; 5. Hinge; 6. Electric telescopic rod; 7. Spray pipe; 8. Nozzle; 9. Water pipe; 10. Mobile power supply; 11. Water pump; 12. Support assembly; 1201. Threaded sleeve; 1202. Threaded rod; 1203. Support plate; 1204. Crank; 13. Groove; 14. Pin slot; 15. Pin; 16. Socket; 17. Handle. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1 In an embodiment of the present invention, a large-section high-speed railway tunnel blasting method comprises the following steps:

[0035] S1. Geological exploration and measurement: Use precision instruments to measure the three-dimensional coordinates of the tunnel interior and surface to determine the shape, size and location of the tunnel blasting section. Determine the blasting parameters based on factors such as tunnel geological conditions and tunnel cross-sectional dimensions. The blasting parameters include the type of explosives, charge, blasthole arrangement and detonation sequence, and determine the construction excavation contour line.

[0036] S2, drilling and arranging blastholes. The blasthole positions are marked according to the excavation contour and blasting parameters determined in S1, and then the blastholes are drilled using a drilling rig. Plum blossom-shaped anchor rods are used for reinforcement during drilling, and then concrete is sprayed on the face for sealing;

[0037] S3, charging, after drilling is completed, the explosives are loaded into the blasthole and necessary plugging is performed;

[0038] S4. Set up safety protection devices. After the charging is completed, relevant personnel will push the safety protection devices into the tunnel and move them in front of the evacuated personnel and other equipment, and then deploy them in the direction of blasting;

[0039] S5, spray dust reduction treatment, after the detonation operation, open the spray system on the safety protection device to spray towards the blasting site to achieve air purification;

[0040] S6. Clean up after blasting: clean up the rubble and debris produced by blasting and prepare for the next round of blasting.

[0041] See also Figure 2-6 A safety protection device for a large-section high-speed railway tunnel blasting method comprises a mobile platform 1, a vertical plate 2, a first protective plate 3 and a second protective plate 4. The mobile platform 1 is provided with a vertical plate 2, and the first protective plate 3 and the second protective plate 4 are respectively provided on both sides of the vertical plate 2. The first protective plate 3 and the second protective plate 4 are both hinged with a hinge 5, and an electric telescopic rod 6 is provided between the first protective plate 3 and the second protective plate 4. The cylinder end of the electric telescopic rod 6 is hinged with the vertical plate 2, and the piston rod end of the electric telescopic rod 6 is hinged with the first protective plate 3 or the second protective plate 4. A spray pipe 7 is installed on the first protective plate 3 and the second protective plate 4, and a nozzle 8 is installed on the spray pipe 7. The nozzle 8 is embedded in the first protective plate 3 and the second protective plate 4. One end of the spray pipe 7 is connected to a water pipe 9, and the water pipe 9 is connected to the water outlet end of a water pump 11 installed on the mobile platform 1.

[0042] The mobile platform 1 includes a platform 101 and running wheels 102. There are four running wheels 102 installed at the bottom of the platform 101. The mobile platform 1 can make it easier for the safety protection device to move in the tunnel, so that the safety protection device can move with the blasting position, thereby achieving safety protection for the entire tunnel blasting process.

[0043] Support components 12 are installed at the four corners of the mobile platform 1, and the support component 12 includes a threaded sleeve 1201, a threaded rod 1202, a support plate 1203 and a crank 1204. The threaded sleeve 1201 is embedded on the table 101, and the threaded sleeve 1201 is internally threaded with the threaded rod 1202. The bottom and top ends of the threaded rod 1202 are respectively installed with the support plate 1203 and the crank 1204. When in use, the crank 1204 is turned, and the crank 1204 drives the threaded rod 1202 to rotate relative to the threaded sleeve 1201, and the threaded rod 1202 drives the support plate 1203 to move downward until the support plate 1203 touches the ground. The support component 12 can support the device, and can improve the stability of the safety protection device during use.

[0044] The rear surfaces of the first protective plate 3 and the second protective plate 4 are both provided with a latch groove 14, in which a latch 15 is arranged, and the latch 15 is plugged into and matched with a corresponding socket 16 on the table 101. The arrangement of the latch 15 can connect the first protective plate 3 and the table 101 as well as the second protective plate 4 and the table 101 together, thereby improving the impact resistance of the first protective plate 3 and the second protective plate 4 and improving the protective capability.

[0045] A groove 13 is provided on the front surface of the first protective plate 3 and the second protective plate 4 to facilitate the extension of the nozzle 8. The arrangement of the groove 13 can make the front end of the nozzle 8 further back than the front end surfaces of the first protective plate 3 and the second protective plate 4 to avoid being damaged by flying gravel.

[0046] Handles 17 are installed on both sides of the vertical plate 2. The arrangement of the handles 17 can facilitate personnel to push or pull the safety protection device to move in the tunnel, thereby improving the convenience of moving the safety protection device.

[0047] A mobile power source 10 is installed on the mobile platform 1 , and the mobile power source 10 is electrically connected to the electric telescopic rod 6 and the water pump 11 . A switch for controlling the electric telescopic rod 6 and the water pump 11 is provided on the mobile power source 10 .

[0048] A plurality of nozzles 8 are arranged at equal distances on the spray pipe 7. A plurality of nozzles 8 can make the spraying more uniform and the dust removal effect better.

[0049] When the safety protection device is used, the safety protection device is first moved to a predetermined position by manually holding the handle 17 under the drive of the walking wheel 102, and then the cranks 1204 on the four support assemblies 12 are rotated in turn to adjust the support assemblies 12 so that the support assemblies 12 are supported on the ground to keep the device stable, and then the electric telescopic rod 6 is started, and the electric telescopic rod 6 is extended to drive the first protective plate 3 and the second protective plate 4 to unfold into a plane, and then the pin 15 is inserted into the corresponding socket 16 on the table 101 for use. When the blasting is completed, the water pump 11 is turned on, and the water pump 11 draws external water into the water pipe 9, and the water is transported to the spray pipe 7 on the first protective plate 3 and the second protective plate 4 by the water pipe 9, and then the water is sprayed from the nozzle 8 of the spray pipe 7 to reduce the dust generated by the blasting. After use, the pin 15 is first pulled out of the socket 16, and then the electric telescopic rod 6 is retracted to cover the first protective plate 3 and the second protective plate 4, and then after adjusting the height of each support assembly 12, the device can be pulled out of the tunnel.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A large-section high-speed railway tunnel blasting method, characterized in that: The steps include: S1. Geological exploration and measurement: Use precision instruments to measure the three-dimensional coordinates of the tunnel interior and surface, so as to determine the shape, size and location of the tunnel blasting section, determine the blasting parameters according to the tunnel geological conditions and tunnel section dimensions, and determine the construction excavation contour line; S2, drilling, marking the blasthole position according to the excavation contour and blasting parameters determined in S1, and then using a drilling rig to drill the blasthole; S3, charging, after drilling is completed, the explosives are loaded into the blasthole and necessary plugging is performed; S4. Set up safety protection devices. After the charging is completed, relevant personnel will push the safety protection devices into the tunnel and move them in front of the evacuated personnel and other equipment, and then deploy them in the direction of blasting; S5, spray dust reduction treatment, after the detonation operation, open the spray system on the safety protection device to spray towards the blasting site to achieve air purification; S6. Clean up after blasting: clean up the rubble and debris produced by blasting and prepare for the next round of blasting.

2. A safety protection device for a large-section high-speed railway tunnel blasting method, comprising a mobile platform (1), a vertical plate (2), a first protection plate (3) and a second protection plate (4), characterized in that: The mobile platform (1) is provided with a vertical plate (2), and a first protective plate (3) and a second protective plate (4) are respectively provided on both sides of the vertical plate (2), and the first protective plate (3) and the second protective plate (4) are both hinged to each other through hinges (5), and an electric telescopic rod (6) is provided between the first protective plate (3) and the second protective plate (4), and the cylinder end of the electric telescopic rod (6) is hinged to the vertical plate (2), and the piston rod end of the electric telescopic rod (6) is hinged to the first protective plate (3) or the second protective plate (4), and a spray pipe (7) is installed on the first protective plate (3) and the second protective plate (4), and a nozzle (8) is installed on the spray pipe (7), and the nozzle (8) is embedded in the first protective plate (3) and the second protective plate (4), and one end of the spray pipe (7) is connected to a water pipe (9), and the water pipe (9) is connected to the water outlet end of a water pump (11) installed on the mobile platform (1).

3. The safety protection device for the large-section high-speed railway tunnel blasting method according to claim 2 is characterized in that: The mobile platform (1) comprises a platform (101) and running wheels (102), wherein a total of four running wheels (102) are provided and are installed at the bottom of the platform (101).

4. The safety protection device for the large-section high-speed railway tunnel blasting method according to claim 2 is characterized in that: The mobile platform (1) is provided with support components (12) at the four corners thereof. The support components (12) include a threaded sleeve (1201), a threaded rod (1202), a support plate (1203) and a crank (1204). The threaded sleeve (1201) is embedded in the tabletop (101). The threaded sleeve (1201) is internally threadedly connected to the threaded rod (1202). The bottom end and the top end of the threaded rod (1202) are provided with a support plate (1203) and a crank (1204) respectively.

5. The safety protection device for the large-section high-speed railway tunnel blasting method according to claim 2 is characterized in that: The rear surfaces of the first protective plate (3) and the second protective plate (4) are both provided with latch grooves (14), and latches (15) are arranged in the latch grooves (14). The latches (15) are plugged into and matched with corresponding sockets (16) provided on the table top (101).

6. The safety protection device for the large-section high-speed railway tunnel blasting method according to claim 2 is characterized by: A groove (13) for facilitating the extension of the nozzle (8) is provided on the front plate surfaces of the first protective plate (3) and the second protective plate (4).

7. The safety protection device for the large-section high-speed railway tunnel blasting method according to claim 2 is characterized by: Handles (17) are installed on both sides of the vertical board (2).

8. The safety protection device for the large-section high-speed railway tunnel blasting method according to claim 2 is characterized by: A mobile power source (10) is installed on the mobile platform (1), and the mobile power source (10) is electrically connected to the electric telescopic rod (6) and the water pump (11).

9. The safety protection device for the large-section high-speed railway tunnel blasting method according to claim 2, characterized in that: A plurality of nozzles (8) are arranged at equal distances on the spray pipe (7).

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