A highway tunnel blasting construction protection device and construction method thereof

Abstract

The invention relates to a highway tunnel blasting construction protection device and a construction method thereof, belonging to the technical field of construction protection equipment, comprising a base plate horizontally installed on the ground, a support rod whose lower end is detachably connected to the base plate and vertically arranged, and a ceiling detachably connected to the upper end of the support rod; the support rod comprises a coaxially arranged fixed rod and a telescopic rod, a mounting hole is provided on the base plate, the lower end of the fixed rod is plugged into the mounting hole, a connecting hole is provided on the ceiling, the upper end of the telescopic rod is plugged into the connecting hole, the lower end of the telescopic rod is slidably connected to the fixed rod, a driving circuit is built in the fixed rod, and the driving circuit is used for controlling and driving the telescopic rod to perform vertical lifting movement after power is turned on; an output electrode feeding point is provided in the mounting hole, the output electrode feeding point is electrically connected to a power supply, an input electrode feeding point is provided at the lower end of the fixed rod, and the input electrode feeding point is electrically connected to the driving circuit.

Description

Technical Field

[0001] The invention belongs to the technical field of construction protection equipment, and in particular relates to a highway tunnel blasting construction protection device and a construction method thereof. Background Art

[0002] In the construction of modern urban infrastructure, the construction of underpasses has become an indispensable part of the urban transportation network. However, during the construction of underpasses, especially during blasting operations, the strong vibrations often pose a serious threat to the stability of the soil or rock mass around the tunnel. This vibration may cause rockfall in the tunnel, which has become a safety hazard that cannot be ignored during the construction process.

[0003] In view of this problem, the design and use of tunnel blasting protection devices are of vital importance. However, the installation of traditional tunnel blasting protection devices mostly relies on the experience and feel of workers, which not only makes the installation process inefficient, but also makes it difficult to ensure the stability and protection effect of the device. In addition, once the existing tunnel blasting protection devices are assembled, their structure and functions are relatively fixed, making it difficult to flexibly adjust and adapt them according to the specific conditions of the construction site, thus limiting their effectiveness and extensiveness in practical applications. Summary of the invention

[0004] In order to solve the problem that traditional tunnel blasting protection devices rely heavily on the workers' experience and feel during installation, which not only makes the installation process inefficient, but also makes it difficult to ensure the stability and protection effect of the device. In addition, once the existing tunnel blasting protection devices are assembled, their structure and function are relatively fixed, and it is difficult to flexibly adjust and adapt them according to the specific conditions of the construction site, thereby limiting their effectiveness and wide application in practical applications, the present invention provides a highway tunnel blasting construction protection device and a construction method thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A highway tunnel blasting construction protection device comprises a base plate horizontally mounted on the ground, a support rod vertically arranged and detachably connected to the base plate at the lower end, and a ceiling detachably connected to the upper end of the support rod; the support rod comprises a coaxially arranged fixed rod and a telescopic rod, the base plate is provided with a mounting hole, the lower end of the fixed rod is plugged into the mounting hole, the ceiling is provided with a connecting hole, the upper end of the telescopic rod is plugged into the connecting hole, the lower end of the telescopic rod is slidably connected to the fixed rod, the fixed rod is internally provided with a driving circuit, and the driving circuit is used to control and drive the telescopic rod to perform vertical lifting movement after power is turned on;

[0007] An output electrode feed point is provided in the mounting hole, and the output electrode feed point is electrically connected to a power source. An input electrode feed point is provided at the lower end of the fixing rod, and the input electrode feed point is electrically connected to the drive circuit. When the lower end of the fixing rod is inserted into the mounting hole to a stable position, the output electrode feed point contacts the input electrode feed point, and the power source is connected to the drive circuit.

[0008] As a preferred technical solution of the present invention, a limiting slot is provided at the lower end of the fixing rod around its central axis, a slider that can slide in a horizontal direction is provided in the limiting slot, and a reset spring is connected between the slider and the bottom wall of the limiting slot in the depth direction so that the slider is partially exposed outside the limiting slot in the initial state.

[0009] As a preferred technical solution of the present invention, the side of the slider away from the fixed rod is an inclined surface, and the length of the inclined surface from the central axis of the fixed rod gradually increases from bottom to top. When the slider is in an initial state, the length of the lower side of the inclined surface from the central axis of the fixed rod is less than or equal to the radius of the fixed rod; the upper end surface of the slider is a horizontal plane.

[0010] As a preferred technical solution of the present invention, the mounting hole includes a through hole close to the upper side of the base plate and a fixing hole close to the lower side of the base plate, the through hole and the fixing hole are coaxially arranged, the aperture of the through hole is the same as the diameter of the fixing rod, and the aperture of the fixing hole is greater than or equal to the sum of the diameter of the fixing rod and the circumferential exposed length of the slider in the initial state.

[0011] As a preferred technical solution of the present invention, the input electrode feeding point is arranged on the upper end surface of the slider, and the output electrode feeding point is arranged on the upper end surface of the fixing hole. When the slider is in the initial state, the input electrode feeding point corresponds to the output electrode feeding point up and down.

[0012] As a preferred technical solution of the present invention, it also includes an unlocking component, the fixed rod is provided with an operating hole along the axial direction, the operating hole is connected to the limiting slot, and the upper part of the operating hole has an operating opening located on the side wall of the fixed rod, the unlocking component is slidably arranged in the operating hole and the lower end is connected to the slider, when the unlocking component slides in the operating hole, it drives the slider to move into the limiting slot.

[0013] As a preferred technical solution of the present invention, the unlocking assembly includes a pull rope, one end of which is connected to the slider and the other end of which is located at the operating opening.

[0014] As a preferred technical solution of the present invention, the unlocking assembly includes a first connecting rod and a second connecting rod, the lower end of the first connecting rod is hinged to the upper end of the second connecting rod, the lower end of the second connecting rod is hinged to the slider, and the diameter of the first connecting rod is the same as the aperture of the operating hole; when the first connecting rod is perpendicular to the second connecting rod, the slider is in an initial state; when the angle between the first connecting rod and the second connecting rod is less than or greater than 90°, the second connecting rod drives the slider to move into the limiting slot.

[0015] As a preferred technical solution of the present invention, at least two limiting slots are evenly arranged along the circumference of the fixing rod, and the sliding blocks correspond to the limiting slots one by one.

[0016] A construction method, applicable to the above-mentioned highway tunnel blasting construction protection device, comprises the following steps:

[0017] S1: Lay the base plate on the ground at the construction site, insert the lower end of the support rod into the installation hole, and install the ceiling to the upper end of the support rod to complete the preliminary installation;

[0018] S2: inserting the support rod downward along the through hole, and the slider abutting against the bottom plate at the upper opening of the through hole, so that the slider contracts into the limiting slot and squeezes the return spring until the slider is completely received in the limiting slot and slides smoothly down along the through hole;

[0019] S3: When the slider is inserted down along the through hole to the fixing hole, the elastic force of the return spring acts on the slider to make the slider partially pass through the limiting slot, and the upper end surface of the fixing hole forms a limiting fit with the upper end surface of the slider to limit the slider from sliding out of the through hole in the axial direction;

[0020] S4: When the fixing rod is inserted into the mounting hole to a stable position, the upper end surface of the slider abuts against the upper end surface of the fixing hole, the input electrode feeding point of the upper end surface of the slider contacts the output electrode feeding point of the upper end surface of the fixing hole, and the power supply provides power to the driving circuit to control and drive the telescopic rod to perform vertical lifting and lowering movements.

[0021] The beneficial effects of the present invention are:

[0022] This solution uses a sliding connection between the telescopic rod and the fixed rod, in conjunction with a built-in drive circuit, so that the telescopic rod can be vertically raised and lowered as needed, thereby achieving height adjustability of the protective device and enhancing its on-site adaptability; at the same time, by designing a contact structure between the output electrode feed point in the mounting hole and the input electrode feed point at the lower end of the fixed rod, it is achieved that the power supply is automatically connected when the support rod is installed to a stable position, that is, installed in place, so that whether the support rod is installed in place can be judged by whether it is powered on. While providing power to the drive circuit, it also ensures that the support rod is installed in place, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0024] Figure 1 A three-dimensional diagram of a highway tunnel blasting construction protection device according to the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a highway tunnel blasting construction protection device before the support rod and the bottom plate are installed;

[0026] Figure 3 It is a structural schematic diagram of the installation process of the support rod and the bottom plate in a highway tunnel blasting construction protection device of the present invention;

[0027] Figure 4 This is a schematic structural diagram of a highway tunnel blasting construction protection device according to the present invention, in which a support rod and a bottom plate are installed;

[0028] Figure 5 For the present invention Figure 4 A magnified image of point A;

[0029] Figure 6 This is a first structural schematic diagram of an unlocking component in a highway tunnel blasting construction protection device of the present invention;

[0030] Figure 7 It is a second structural schematic diagram of an unlocking component in a highway tunnel blasting construction protection device of the present invention;

[0031] Description of main symbols

[0032] In the figure: 1, bottom plate; 11, mounting hole; 111, through hole; 112, fixing hole; 12, output electrode feeding point; 2, support rod; 21, fixing rod; 211, limiting slot hole; 212, slider; 2121, inclined surface; 2122, horizontal surface; 213, reset spring; 22, telescopic rod; 23, input electrode feeding point; 24, operation hole; 3, ceiling; 40, pull rope; 41, first connecting rod; 42, second connecting rod. DETAILED DESCRIPTION

[0033] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0034] See also Figure 1-7 The present embodiment provides a highway tunnel blasting construction protection device, comprising a base plate 1 horizontally mounted on the ground, a support rod 2 vertically arranged and detachably connected to the base plate 1 at the lower end, and a ceiling 3 detachably connected to the upper end of the support rod 2; the support rod 2 comprises a coaxially arranged fixed rod 21 and a telescopic rod 22, the base plate 1 is provided with a mounting hole 11, the lower end of the fixed rod 21 is plugged into the mounting hole 11, the ceiling 3 is provided with a connecting hole, the upper end of the telescopic rod 22 is plugged into the connecting hole, and the lower end of the telescopic rod 22 is slidably connected to the The fixed rod 21 has a built-in driving circuit, and the driving circuit is used to control the telescopic rod 22 to perform vertical lifting movement after power is turned on; the mounting hole 11 is provided with an output electrode feed point 12, and the output electrode feed point 12 is electrically connected to a power source, and the lower end of the fixed rod 21 is provided with an input electrode feed point 23, and the input electrode feed point 23 is electrically connected to the driving circuit. When the lower end of the fixed rod 21 is inserted into the mounting hole 11 to a stable position, the output electrode feed point 12 and the input electrode feed point 23 are in contact, and the power source and the driving circuit are turned on. It can be understood that this solution enables the telescopic rod 22 to perform vertical lifting movement as needed through the sliding connection between the telescopic rod 22 and the fixed rod 21, in conjunction with the built-in driving circuit, so as to adapt to tunnels of different heights, and utilizes the contact structure between the output electrode feed point 12 in the mounting hole 11 and the input electrode feed point 23 at the lower end of the fixed rod 21, so that the power source is automatically turned on when the support rod 2 is installed to a stable position, and it can be judged whether the support rod 2 is installed in place through the circuit conduction state, thereby improving the safety and accuracy of the installation. Preferably, a control panel is provided on the fixing rod 21, and an ascending button, a descending button and a power-on indicator light are provided on the control panel. When the power-on indicator light is on, it indicates that the driving circuit is connected to the power supply.

[0035] Furthermore, in order to enhance the stability and safety of the assembly and prevent the support rod 2 from accidentally sliding or shifting due to external factors (such as wind, vibration, etc.) during installation and use, a clear installation instruction and positioning point are provided so that the staff can install and adjust the highway tunnel blasting construction protection device more conveniently and accurately. In this scheme, a limiting slot 211 is opened at the lower end of the fixed rod 21 around its central axis, and a slider 212 that can slide in the horizontal direction is provided in the limiting slot 211. A reset spring 213 is connected between the slider 212 and the bottom wall of the limiting slot 211 in the depth direction, so that the slider 212 is partially exposed outside the limiting slot 211 in the initial state, and when the slider 212 is subjected to external force, it can slide in the limiting slot 211; when the external force disappears, the reset spring 213 will push the slider 212 back to the initial state. It can be understood that, through the contact and limitation between the slider 212 and the base plate 1, it can be ensured that the fixing rod 21 will not slide or shift easily due to external factors after installation, thereby enhancing the stability of the entire protective device, and the exposed part of the slider 212 can be used as a reference point for installation and adjustment, so that the staff can complete the installation and adjustment work more quickly and accurately.

[0036] Specifically, the side of the slider 212 away from the fixed rod 21 is an inclined surface 2121, and the length of the inclined surface 2121 from the central axis of the fixed rod 21 gradually increases from bottom to top. When the slider 212 is in the initial state, the length of the lower side of the inclined surface 2121 from the central axis of the fixed rod 21 is less than or equal to the radius of the fixed rod 21; the upper end surface of the slider 212 is a horizontal surface 2122. The inclined surface 2121 of the slider 212 makes it easier for the slider 212 to contact and slide with the structure on the bottom plate 1 during the process of inserting the fixed rod 21 into the mounting hole 11. At the same time, by controlling the length of the inclined surface 2121 from the central axis of the fixed rod 21, it is ensured that the slider 212 will not hinder the insertion of the fixed rod 21 in the initial state, and can provide stable support and limit after being installed in place.

[0037] Furthermore, the mounting hole 11 includes a through hole 111 close to the upper side of the base plate 1 and a fixing hole 112 close to the lower side of the base plate 1. The through hole 111 and the fixing hole 112 are coaxially arranged. The aperture of the through hole 111 is the same as the diameter of the fixing rod 21. The aperture of the fixing hole 112 is greater than or equal to the sum of the diameter of the fixing rod 21 and the circumferential exposed length of the slider 212 in the initial state. It should be explained that the aperture of the through hole 111 is the same as the diameter of the fixing rod 21, which ensures that the fixing rod 21 can be smoothly inserted; and the aperture of the fixing hole 112 is greater than or equal to the sum of the diameter of the fixing rod 21 and the circumferential exposed length of the slider 212 in the initial state, which ensures that during the insertion of the fixing rod 21, the slider 212 can fully enter the fixing hole 112 without being hindered. When the fixing rod 21 begins to be inserted into the mounting hole 11 of the base plate 1, it will first pass through the through hole 111. At this time, the outer diameter of the fixing rod 21 matches the aperture of the through hole 111, ensuring that the fixing rod 21 can be smoothly inserted. As the fixing rod 21 is inserted until the slider 212 abuts against the base plate 1, the slider 212 is retracted into the limiting slot 211 by the extrusion force and smoothly enters the slot and continues to be inserted downward with the fixing rod 21. As the fixing rod 21 is further inserted, the slider 212 begins to enter the fixing hole 112. Since the aperture of the fixing hole 112 is greater than or equal to the sum of the diameter of the fixing rod 21 and the circumferential exposed length of the slider 212 in the initial state, the slider 212 is restored to its initial state by the return spring 213 after entering the fixing hole 112 without being obstructed or squeezed.

[0038] Specifically, the input electrode feed point 23 is arranged on the upper end surface of the slider 212, and the output electrode feed point 12 is arranged on the upper end surface of the fixing hole 112. When the slider 212 is in the initial state, the input electrode feed point 23 corresponds to the output electrode feed point 12 up and down. It can be understood that before the support rod 2 is installed, the slider 212 is in the initial state, and the input electrode feed point 23 on its upper end surface corresponds to the output electrode feed point 12 on the upper end surface of the fixing hole 112 but does not contact, and when the fixing rod 21 is inserted into the mounting hole 11, the slider 212 gradually approaches the fixing hole 112, and the input electrode feed point 23 and the output electrode feed point 12 gradually approach each other. When the slider 212 completely enters the fixing hole 112 and reaches a stable position, the input electrode feed point 23 and the output electrode feed point 12 automatically contact each other to achieve the connection between the power supply and the drive circuit.

[0039] Furthermore, the invention also includes an unlocking assembly, wherein the fixing rod 21 is provided with an operating hole 24 in the axial direction, the operating hole 24 is connected to the limiting slot 211, and the upper part of the operating hole 24 has an operating opening located on the side wall of the fixing rod 21, and the unlocking assembly is slidably arranged in the operating hole 24 and the lower end is connected to the slider 212, and when the unlocking assembly slides in the operating hole 24, the slider 212 is driven to move into the limiting slot 211. When no adjustment or disassembly is required, the unlocking assembly is located at an initial position in the operating hole 24, and at this time, the slider 212 is kept in the initial state under the action of the return spring 213, and is partially exposed outside the limiting slot 211; when the support rod 2 needs to be adjusted or disassembled, the staff can operate the unlocking assembly through the operating opening, so that the slider 212 connected to the lower end thereof overcomes the elastic force of the return spring 213 and moves into the limiting slot 211 until it completely enters the limiting slot 211, and the staff can then conveniently perform the adjustment or disassembly operation of the support rod 2.

[0040] Specifically, Figure 6 As shown, the unlocking assembly includes a pull rope 40, one end of which is connected to the slider 212, and the other end is located at the operating opening. When the support rod 2 needs to be adjusted or disassembled, the staff can pull the other end of the pull rope 40 through the operating opening. As the pull rope 40 is pulled, the end connected to the slider 212 will pull the slider 212 into the limiting slot 211. Under the pulling of the pull rope 40, the slider 212 overcomes the resistance of the return spring 213 and moves into the limiting slot 211 until it completely enters the limiting slot 211. The staff can then conveniently adjust or disassemble the support rod 2.

[0041] Specifically, Figure 7 As shown, the unlocking assembly includes a first link 41 and a second link 42, the lower end of the first link 41 is hinged to the upper end of the second link 42, the lower end of the second link 42 is hinged to the slider 212, and the diameter of the first link 41 is the same as the aperture of the operating hole 24; when the first link 41 is perpendicular to the second link 42, the slider 212 is in the initial state; when the angle between the first link 41 and the second link 42 is less than or greater than 90°, the second link 42 drives the slider 212 to move into the limiting slot 211. When the support rod 2 needs to be adjusted or disassembled, the staff can push the first link 41 downward or pull it upward through the operating opening. As the first link 41 moves downward or upward, the angle between it and the second link 42 gradually decreases or increases (less than 90° or greater than 90°). Due to the hinged relationship between the first link 41 and the second link 42, the second link 42 drives the slider 212 to move into the limiting slot 211. Driven by the second connecting rod 42 , the slider 212 overcomes the resistance of the return spring 213 and moves into the limiting slot 211 until it completely enters the limiting slot 211 , and the staff can then conveniently adjust or disassemble the support rod 2 .

[0042] Specifically, at least two limiting slots 211 are evenly arranged along the circumference of the fixed rod 21, and the slider 212 corresponds one-to-one to the limiting slots 211. By opening a plurality of evenly distributed limiting slots 211 on the fixed rod 21 and achieving one-to-one correspondence with the slider 212, the slider 212 can be locked at different slot positions, ensuring that the support rod 2 can be stably locked at multiple positions, and the protective structure is more stable.

[0043] The present invention also proposes a construction method, which is applicable to the above-mentioned highway tunnel blasting construction protection device, comprising the following steps:

[0044] S1: Lay the base plate 1 on the ground at the construction site, insert the lower end of the support rod 2 into the installation hole 11, and install the ceiling 3 to the upper end of the support rod 2 to complete the preliminary installation;

[0045] S2: The support rod 2 is inserted downward along the through hole 111, and the slider 212 abuts against the bottom plate 1 at the upper opening of the through hole 111, so that the slider 212 contracts into the limiting slot 211 and squeezes the return spring 213, until the slider 212 is completely received in the limiting slot 211, and the slider 212 slides smoothly down along the through hole 111;

[0046] S3: When the slider 212 is inserted down along the through hole 111 to the fixing hole 112, the elastic force of the return spring 213 acts on the slider 212, so that the slider 212 partially passes through the limiting slot 211, and the upper end surface of the fixing hole 112 forms a limiting fit with the upper end surface of the slider 212, so as to limit the slider 212 from sliding out of the through hole 111 in the axial direction;

[0047] S4: When the fixing rod 21 is inserted into the mounting hole 11 to a stable position, the upper end surface of the slider 212 abuts against the upper end surface of the fixing hole 112, and the input electrode feeding point 23 on the upper end surface of the slider 212 contacts the output electrode feeding point 12 on the upper end surface of the fixing hole 112. The power supply provides power to the driving circuit to control the telescopic rod 22 to perform vertical lifting movement.

[0048] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A road tunnel blasting construction protection device, characterized in that: The invention comprises a base plate installed horizontally on the ground, a support rod detachably connected to the base plate at the lower end and vertically arranged, and a ceiling detachably connected to the upper end of the support rod; the support rod comprises a fixed rod and a telescopic rod coaxially arranged, the base plate is provided with a mounting hole, the lower end of the fixed rod is plugged into the mounting hole, the ceiling is provided with a connecting hole, the upper end of the telescopic rod is plugged into the connecting hole, the lower end of the telescopic rod is slidably connected to the fixed rod, the fixed rod is internally provided with a driving circuit, and the driving circuit is used to control and drive the telescopic rod to perform vertical lifting movement after power is turned on; An output electrode feed point is provided in the mounting hole, and the output electrode feed point is electrically connected to a power source. An input electrode feed point is provided at the lower end of the fixing rod, and the input electrode feed point is electrically connected to the drive circuit. When the lower end of the fixing rod is inserted into the mounting hole to a stable position, the output electrode feed point contacts the input electrode feed point, and the power source is connected to the drive circuit. The lower end of the fixing rod is provided with a limiting slot around its central axis, and a slider that can slide in the horizontal direction is provided in the limiting slot. A return spring is connected between the slider and the bottom wall of the limiting slot in the depth direction, so that the slider is partially exposed outside the limiting slot in the initial state; The side of the slider away from the fixing rod is an inclined surface, the length of the inclined surface from the central axis of the fixing rod gradually increases from bottom to top, and when the slider is in an initial state, the length of the lower side of the inclined surface from the central axis of the fixing rod is less than or equal to the radius of the fixing rod; the upper end surface of the slider is a horizontal plane; The mounting hole comprises a through hole close to the upper side of the bottom plate and a fixing hole close to the lower side of the bottom plate, the through hole and the fixing hole are coaxially arranged, the aperture of the through hole is the same as the diameter of the fixing rod, and the aperture of the fixing hole is greater than or equal to the sum of the diameter of the fixing rod and the circumferential exposed length of the slider in the initial state; The input electrode feeding point is arranged on the upper end surface of the slider, and the output electrode feeding point is arranged on the upper end surface of the fixing hole. When the slider is in the initial state, the input electrode feeding point corresponds to the output electrode feeding point up and down; It also includes an unlocking component, the fixed rod is provided with an operating hole along the axial direction, the operating hole is connected to the limiting slot, and the upper part of the operating hole has an operating opening located on the side wall of the fixed rod, the unlocking component is slidably arranged in the operating hole and the lower end is connected to the slider, when the unlocking component slides in the operating hole, it drives the slider to move into the limiting slot.

2. A highway tunnel blasting construction protection device according to claim 1, characterized in that: The unlocking assembly includes a pull rope, one end of which is connected to the slider and the other end of which is located at the operating opening.

3. A highway tunnel blasting construction protection device according to claim 1, characterized in that: The unlocking assembly includes a first connecting rod and a second connecting rod, the lower end of the first connecting rod is hinged to the upper end of the second connecting rod, the lower end of the second connecting rod is hinged to the slider, and the diameter of the first connecting rod is the same as the aperture of the operating hole; when the first connecting rod is perpendicular to the second connecting rod, the slider is in an initial state; when the angle between the first connecting rod and the second connecting rod is less than or greater than 90°, the second connecting rod drives the slider to move into the limiting slot.

4. A road tunnel blasting construction protection device according to claim 1, characterized in that: At least two limiting slots are evenly arranged along the circumference of the fixing rod, and the sliding blocks correspond to the limiting slots one by one.

5. A construction method, applicable to a highway tunnel blasting construction protection device as claimed in any one of claims 2 or 3, characterized in that: The following steps are involved: S1: Lay the base plate on the ground at the construction site, insert the lower end of the support rod into the installation hole, and install the ceiling to the upper end of the support rod to complete the preliminary installation; S2: inserting the support rod downward along the through hole, and the slider abutting against the bottom plate at the upper opening of the through hole, so that the slider contracts into the limiting slot and squeezes the return spring until the slider is completely received in the limiting slot and slides smoothly down along the through hole; S3: When the slider is inserted down along the through hole to the fixing hole, the elastic force of the return spring acts on the slider to make the slider partially pass through the limiting slot, and the upper end surface of the fixing hole forms a limiting fit with the upper end surface of the slider to limit the slider from sliding out of the through hole in the axial direction; S4: When the fixing rod is inserted into the mounting hole to a stable position, the upper end surface of the slider abuts against the upper end surface of the fixing hole, the input electrode feeding point of the upper end surface of the slider contacts the output electrode feeding point of the upper end surface of the fixing hole, and the power supply provides power to the driving circuit to control and drive the telescopic rod to perform vertical lifting and lowering movements.

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