Blasting vibration reduction equipment based on unfavorable geology

Abstract

The utility model relates to the technical field of blasting vibration reduction, and discloses blasting vibration reduction equipment based on unfavorable geology, the effect of fixing a tunnel frame body is realized by arranging structures such as a reinforced concrete approach slab, a buffer layer and a feet-lock anchor pipe, and the whole reinforced concrete approach slab is formed by pouring C40 high-strength concrete and aims at bearing the load from the upper part and reducing the deformation of the tunnel frame body. The whole buffer layer is made of bamboo plywood with the thickness of 1 cm and medium-coarse sand with the thickness of 48 cm, and the medium-coarse sand is located in the thick bamboo plywood and aims to reduce the vibration generated during blasting, namely, the energy dissipation effect is achieved, and the tunnel frame is prevented from deforming, cracking and other destructive conditions; the position, located on the outer ring of the locking ring and the outer ring of the reinforcement cage, in the feet-lock anchor pipe is filled with M35 mortar densely, the bending resistance of the feet-lock anchor pipe is improved, and the effects of weakening explosive vibration borne by a tunnel and fixing the tunnel are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of blasting vibration reduction, in particular to a blasting vibration reduction device based on poor geology. Background Art

[0002] With the development of society and the continuous advancement of science and technology, my country is vigorously developing infrastructure. When excavating tunnels in mountains, it is easy to encounter unfavorable geological layers. The methods often used in tunnel excavation are drilling and blasting, shield method and tunnel boring machine method. Among them, the drilling and blasting method has strong adaptability to geological conditions and low excavation cost, which is especially suitable for the construction of hard rock tunnels, broken rock tunnels and a large number of short tunnels.

[0003] During existing tunnel construction, the tunnel will generate large vibrations during the blasting process, which will affect the stability of the soil or rock around the tunnel, and easily cause the soil or rock on both sides of the tunnel to slide into the tunnel, posing certain safety hazards and further affecting the excavation and construction efficiency of the tunnel.

[0004] When blasting is carried out at the inner end of the tunnel, the soil and rock around the blasting point will be shattered. Once the bottom of the tunnel is blown into a cavity, the tunnel arch will also sink. In order to avoid the overall construction safety of the tunnel, a blasting shock absorption device is required. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a blasting vibration reduction device based on poor geology, which has the advantages of tunnel protection and blasting vibration reduction, and solves the problems raised by the above-mentioned background technology.

[0006] The utility model provides the following technical scheme: a blasting vibration reduction device based on poor geology, comprising a tunnel frame, the bottom of the tunnel frame is a tunnel invert, a reinforced concrete slab is fixedly installed at the bottom of the tunnel invert, a buffer layer is fixedly installed at the bottom of the reinforced concrete slab, the buffer layer comprises thick bamboo plywood and coarse and medium sand, the coarse and medium sand is located inside the thick bamboo plywood, circular grooves are opened on both sides of the bottom of the tunnel frame, locking foot anchor pipes are fixedly installed inside the circular grooves, shock-absorbing plates are fixedly installed on both sides of the tunnel frame above the locking foot anchor pipes, side wing plates are fixedly installed on both sides of the tunnel frame at the top of the shock-absorbing plates, and an arch plate is movably connected between the side wing plates at the top of the tunnel frame.

[0007] Preferably, the reinforced concrete slab is made of C40 high-strength concrete, and the buffer layer is made of 1 cm thick bamboo plywood and 48 cm thick medium-coarse sand.

[0008] Preferably, a spring is fixedly connected to a side of the shock-absorbing plate away from the tunnel frame, and a pressure-bearing plate is fixedly connected to the other end of the spring.

[0009] Preferably, the locking foot anchor tube comprises a tube body, the interior of the tube body is linearly and evenly fixed with a locking ring, the interior of the locking ring is provided with a plurality of holes, and a steel cage is fixedly sleeved inside the holes.

[0010] Preferably, the circular grooves are located inside the tunnel frame with a longitudinal spacing of 1.5 meters, with 2 grooves provided at each location and a spacing of 27.5 cm. The length of a single locking foot anchor pipe is 4.5 meters, and the interior of the locking foot anchor pipe is located at the locking ring and the outer ring of the steel cage and is filled with M35 mortar.

[0011] Preferably, a slide groove is provided on the top of the side wing plate, both ends of the arch plate are located inside the slide groove, the width of the slide groove is twice the width of the arch plate, and a shock-absorbing spring is fixedly connected between the inner circle of the arch plate and the top of the tunnel frame.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The blasting vibration reduction equipment based on poor geology realizes the protection around the tunnel by setting structures such as shock-absorbing plates, side wing plates, and arch plates. When the pressure plate is squeezed or blasted by the tunnel frame from both sides, the pressure plate shrinks inward and slides toward the shock-absorbing plate. The spring between the shock-absorbing plate and the pressure plate reduces the vibration to avoid impact on the tunnel frame. When the arch plate receives blasting force or vibration from the top, it moves downward under the force and slides to the bottom of the slide slot, changing the distance between the two ends of the arch plate, thereby improving the pressure-bearing capacity of the arch plate and playing the role of protecting the tunnel.

[0014] 2. The blasting vibration reduction equipment based on poor geology achieves the effect of fixing the tunnel frame by setting up reinforced concrete slabs, buffer layers, locking foot anchor pipes and other structures. The reinforced concrete slabs are made of C40 high-strength concrete as a whole. Its purpose is to bear the load from the upper part and resist part of the vibration generated by the blasting. The buffer layer is made of 1cm thick bamboo plywood and 48cm thick medium-coarse sand as a whole. The coarse and medium sand is located inside the thick bamboo plywood. Its purpose is to reduce the vibration generated during the blasting, that is, the energy dissipation effect, and prevent the tunnel frame from deformation, cracking and other destructive conditions. The inside of the locking foot anchor pipe is located in the locking ring and the outer ring of the steel cage is filled with M35 mortar, and the filling is dense, which improves the bending resistance of the locking foot anchor pipe, and plays a role in reducing the explosion vibration and fixing the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is an exploded diagram of the buffer layer structure of the utility model;

[0017] Figure 3 This is a cross-sectional view of the locking foot anchor pipe structure of the utility model;

[0018] Figure 4 This is an exploded diagram of the shock-absorbing plate structure of the utility model;

[0019] Figure 5 It is a schematic diagram of the arch plate structure of the utility model.

[0020] In the figure: 1. Tunnel frame; 2. Reinforced concrete slab; 3. Buffer layer; 31. Thick bamboo plywood; 32. Coarse and medium sand; 4. Locking foot anchor pipe; 41. Pipe body; 42. Locking ring; 43. Reinforcement cage; 5. Shock-absorbing plate; 51. Pressure plate; 6. Side wing plate; 61. Slide; 7. Arch plate; 71. Shock-absorbing spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 2 A blasting vibration reduction device based on poor geology includes a tunnel frame 1, the bottom of the tunnel frame 1 is a tunnel invert, a reinforced concrete slab 2 is fixedly installed at the bottom of the tunnel invert, the reinforced concrete slab 2 is made of C40 high-strength concrete, and its purpose is to bear the load from the upper part and resist a part of the vibration generated during blasting, a buffer layer 3 is fixedly installed at the bottom of the reinforced concrete slab 2, the buffer layer 3 includes a thick bamboo plywood 31 and coarse and medium sand 32, the buffer layer 3 is made of 1 cm thick bamboo plywood and 48 cm thick medium and coarse sand, and the coarse and medium sand 32 is located at the thick bamboo plywood 31. Inside, its purpose is to reduce the vibration generated during blasting, that is, the energy dissipation effect, to prevent the tunnel frame 1 from deformation, cracking and other destructive situations. Circular grooves are opened on both sides of the bottom of the tunnel frame 1, and locking foot anchor pipes 4 are fixedly installed inside the circular grooves. Shock-absorbing plates 5 are fixedly installed on both sides of the tunnel frame 1 above the locking foot anchor pipes 4. A spring is fixedly connected to the side of the shock-absorbing plate 5 away from the tunnel frame 1, and a pressure plate 51 is fixedly connected to the other end of the spring. Side wing plates 6 are fixedly installed on the top of the shock-absorbing plates 5 on both sides of the tunnel frame 1, and an arch plate 7 is movably connected between the side wing plates 6 on the top of the tunnel frame 1.

[0023] When the pressure plate 51 is subjected to squeezing or blasting force from both sides toward the tunnel frame 1 , the pressure plate 51 contracts inwards and slides toward the damping plate 5 . The spring between the damping plate 5 and the pressure plate 51 reduces vibration to avoid impact on the tunnel frame 1 .

[0024] See also Figure 1-Figure 3The circular grooves are located inside the tunnel frame 1 with a longitudinal spacing of 1.5 meters. Two grooves are set at each location with a spacing of 27.5 cm. The length of a single locking foot anchor pipe 4 is 4.5 meters. The locking foot anchor pipe 4 includes a tube body 41. The inside of the tube body 41 is linearly and evenly fixed with a locking ring 42. A plurality of holes are opened inside the locking ring 42. A steel cage 43 is fixedly sleeved inside the holes. The inside of the locking foot anchor pipe 4 is located at the outer circle of the locking ring 42 and the steel cage 43. M35 mortar is filled and filled densely to improve the bending resistance of the locking foot anchor pipe 4.

[0025] See also Figure 1-Figure 5 A slide groove 61 is provided at the top of the side wing plate 6, and both ends of the arch plate 7 are located inside the slide groove 61. The width of the slide groove 61 is twice the width of the arch plate 7, leaving room for the arch plate 7 to slide. A shock-absorbing spring 71 is fixedly connected between the inner circle of the arch plate 7 and the top of the tunnel frame 1. When the arch plate 7 receives an explosive force or vibration from the top, it moves downward under the force and slides to the bottom of the slide groove 61, thereby changing the distance between the two ends of the arch plate 7 and improving the pressure-bearing capacity of the arch plate 7.

[0026] Working principle: When conducting extension blasting inside the tunnel, the tunnel frame 1 is laid to the end of the tunnel, circular grooves are opened at intervals on both sides of the bottom of the tunnel frame 1, and the locking foot anchor pipes 4 are filled into the circular grooves, and the locking foot anchor pipes 4 are filled with M35 mortar, and the mortar is waited for to solidify to fix the position of the overall structure. A reinforced concrete slab 2 is placed under the tunnel frame 1, and a buffer layer 3 is placed under the reinforced concrete slab 2, so that the reinforced concrete slab 2 and the buffer layer 3 weaken the vibration of the tunnel frame 1 and eliminate the impact and vibration from the bottom side. When the pressure plate 51 is squeezed or blasted by the tunnel frame 1 from both sides, The pressure plate 51 contracts inwards and slides toward the shock-absorbing plate 5. The spring between the shock-absorbing plate 5 and the pressure plate 51 reduces the vibration to avoid impact on the tunnel frame 1. When the arch plate 7 receives blasting force or vibration from the top, it moves downward under the force and slides to the bottom of the slide groove 61, changing the distance between the two ends of the arch plate 7, so that the pressure bearing capacity of the arch plate 7 is improved. Since the locking foot anchor pipe 4 penetrates deep into the soil or rock layer, the entire device is firmly fixed. When the entire device is subjected to blasting vibration, the buffer layer 3, the shock-absorbing plate 5, and the arch plate 7 respectively eliminate or reduce the weak performance, and the locking foot anchor pipe 4 is used for auxiliary fixation to reduce damage to the entire device.

Claims

1. A blasting vibration reduction device based on adverse geology, comprising a tunnel frame (1), characterized in that: The bottom of the tunnel frame (1) is a tunnel inverted arch, a reinforced concrete slab (2) is fixedly installed at the bottom of the tunnel inverted arch, a buffer layer (3) is fixedly installed at the bottom of the reinforced concrete slab (2), the buffer layer (3) comprises a thick bamboo plywood (31) and coarse medium sand (32), the coarse medium sand (32) is located inside the thick bamboo plywood (31), circular grooves are provided on both sides of the bottom of the tunnel frame (1), a locking foot anchor pipe (4) is fixedly installed inside the circular groove, a shock absorbing plate (5) is fixedly installed on both sides of the tunnel frame (1) above the locking foot anchor pipe (4), side wing plates (6) are fixedly installed on both sides of the tunnel frame (1) at the top of the shock absorbing plate (5), and an arch plate (7) is movably connected between the side wing plates (6) at the top of the tunnel frame (1).

2. The blasting vibration reduction device based on adverse geology according to claim 1 is characterized by: The reinforced concrete slab (2) is made of C40 high-strength concrete, and the buffer layer (3) is made of 1 cm thick bamboo plywood and 48 cm thick medium-coarse sand.

3. The blasting vibration reduction device based on adverse geology according to claim 2 is characterized by: A spring is fixedly connected to a surface of the shock-absorbing plate (5) away from the tunnel frame (1), and a pressure-bearing plate (51) is fixedly connected to the other end of the spring.

4. The blasting vibration reduction device based on adverse geology according to claim 3 is characterized by: The locking foot anchor pipe (4) comprises a pipe body (41), the interior of the pipe body (41) is linearly and evenly fixedly sleeved with a locking ring (42), the interior of the locking ring (42) is provided with a plurality of holes, and a steel cage (43) is fixedly sleeved inside the holes.

5. The blasting vibration reduction device based on adverse geology according to claim 4 is characterized by: The circular grooves are located inside the tunnel frame (1) at a longitudinal spacing of 1.5 meters, with two grooves provided at each location and a spacing of 27.5 cm. The length of a single locking foot anchor pipe (4) is 4.5 meters. The interior of the locking foot anchor pipe (4) is located at the outer ring of the locking ring (42) and the steel cage (43) and is filled with M35 mortar.

6. The blasting vibration reduction device based on adverse geology according to claim 5 is characterized by: A slide groove (61) is provided at the top of the side wing plate (6), and both ends of the arch plate (7) are located inside the slide groove (61). The width of the slide groove (61) is twice the width of the arch plate (7). A shock-absorbing spring (71) is fixedly connected between the inner circle of the arch plate (7) and the top of the tunnel frame (1).

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