Slope net hanging guniting construction device and method

Abstract

The side slope net hanging guniting supporting construction device comprises an effect improving assembly and a noise reduction assembly, a rotating disc in the effect improving assembly is rotationally connected into a groove hole formed in a bottom plate, a connecting piece is fixedly connected into a groove hole formed in the rotating disc, the output end of a speed reducer is sleeved with the connecting piece, and a supporting frame is fixedly connected to the bottom plate; a supporting base plate is fixedly connected to one side of the supporting frame; according to the concrete mixing device, concrete is stirred and mixed through cooperation of the efficiency improving assembly and the arc-shaped piece, the mixing efficiency is effectively improved, and meanwhile the situation that the construction progress is affected due to uneven mixing is avoided; vibration generated by equipment operation is weakened through the noise reduction assembly, the vibration generated by equipment operation is effectively reduced, and therefore the noise generated by equipment operation is reduced, the construction environment is optimized, and the enthusiasm of workers is improved. The joint bar is completed by adopting a joint bar direct driving-in process, the punching process is omitted, the construction process is optimized under the condition that the soil texture of the slope protection is proper, the construction cost is reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of shotcrete support, and in particular to a slope mesh shotcrete support construction device and a method thereof. Background Art

[0002] Slope mesh shotcrete support, also known as mesh anchor shotcrete protection or shotcrete anchor mesh support, is an engineering technology widely used in slope protection. It is a protective measure taken on the slope surface to prevent the slope from being weathered and eroded by rainfall from the surface to the inside. In the prior art, shotcrete or sprayed concrete surface protection is usually adopted. However, for slopes of plastic rock (soft rock, soil), since the shotcrete shell is brittle, its deformation characteristics are not coordinated with the plastic rock covered by it, which often causes the shotcrete shell to peel off. In order to improve the plasticity and strength of the shotcrete shell, a wire mesh is laid on the slope before shotcrete, and then shotcrete is sprayed to form a mesh shotcrete shell.

[0003] In the slope mesh spraying process, the slurry is first prepared, and then the cement slurry is transported to the nozzle by a high-pressure pump, forming a high-speed jet flow at the nozzle, and the slurry is evenly sprayed on the slope protection surface, so that the slurry is in full contact with the slope protection surface to form a solid slope protection layer.

[0004] In the process of slope protection spraying, the quality of concrete has a decisive influence on the construction quality, such as:

[0005] 1. Concrete ratio: The concrete ratio is directly related to its strength, durability and crack resistance. In the process of slope protection spraying, if the ratio is improper, it may lead to insufficient concrete strength, thus affecting the stability and service life of the slope protection;

[0006] 2. Mixing uniformity: The mixing uniformity of concrete is the key to ensuring its performance. If the mixing is not uniform, it will cause voids or uneven density inside the concrete, thus affecting the overall performance of the concrete. In the prior art, there are certain shortcomings in the concrete mixing process. First, the mixer in the existing construction device is less efficient when mixing concrete, and the concrete is easily mixed unevenly, affecting the firmness and stability of the slope. Second, the existing construction device will generate a lot of noise when in use, affecting the construction environment and easily reducing the enthusiasm of workers.

[0007] Therefore, it is necessary to develop a slope hanging mesh spraying construction device and method thereof Summary of the invention

[0008] The purpose of the present invention is to provide a slope mesh spraying support construction device and method thereof to solve the problems raised in the above-mentioned background technology.

[0009] To this end, the first technical solution provided by the present invention is as follows:

[0010] A slope mesh spraying support construction device comprises a base plate, a support frame is fixedly connected to the base plate, and a noise reduction component is fixedly connected to the support frame; an efficiency-enhancing component is also rotatably connected to the base plate, and the efficiency-enhancing component consists of a turntable, a connecting member, a reducer, a first motor and a motor support, and the output end of the reducer is rotatably connected to a through hole provided in the base plate; a stirring barrel is fixedly connected to the turntable; a support beam is provided above the support frame, and a transmission member is installed on the support beam, and the transmission member is sleeved on the output end of the second motor, and a stirring shaft is sleeved on the transmission member, and a stirring rod is provided on the stirring shaft;

[0011] A shotcrete machine body is also fixedly connected to one side of the bottom plate, a shotcrete port is opened on one side of the shotcrete machine body, and a control console and a material extraction pipe are fixedly connected to the shotcrete machine body, and the material extraction pipe is connected in cooperation with the inside of the mixing barrel.

[0012] Furthermore, in the above-mentioned slope mesh spraying support construction device, the noise reduction component includes a bottom kit, a top kit, and a first spring, one end of the first spring is fixedly connected to the bottom kit, and the other end of the first spring is fixedly connected to the top kit; the bottom kit is fixedly connected to the support frame, and the top kit is fixedly connected to the support beam.

[0013] Furthermore, in the above-mentioned slope hanging mesh spraying support construction device, the noise reduction component also includes a top piece, a positioning piece, a limiting piece, a bottom piece, a positioning telescopic rod and a second spring; the bottom of the bottom plate is fixedly connected to a support piece, the top piece is fixedly connected to the slot hole opened at the bottom of the support piece, the top piece is fixedly connected to the positioning piece, the positioning piece is sleeved with a limiting piece, and the limiting piece is fixedly connected to the bottom piece; one end of the positioning telescopic rod is also fixedly connected to the top piece, and the other end of the positioning telescopic rod is fixedly connected to the bottom piece; one end of the second spring is fixedly connected to the bottom piece, the other end of the second spring is fixedly connected to the top piece, and the second spring is sleeved on the positioning telescopic rod.

[0014] Furthermore, in the above-mentioned slope mesh spraying support construction device, an arc-shaped part is opened on the inner side of the mixing barrel, and a discharge port is opened on the side of the mixing barrel, and a valve is provided on the discharge port.

[0015] Furthermore, in the above-mentioned slope mesh spraying support construction device, a turntable in the efficiency improvement component is rotatably connected in the slot hole opened in the base plate; a connecting piece is fixedly connected in the slot hole opened in the turntable, and the connecting piece is sleeved on the output end of the reducer; the input end of the reducer is sleeved on the output end of the first motor, the first motor is fixedly connected to the inside of the motor support, and the motor support is fixedly connected to the bottom of the base plate.

[0016] Furthermore, in the above-mentioned slope mesh spraying support construction device, a support pad is fixedly connected to one side of the support frame, and a support sheet metal is fixedly connected between the support pad and the support frame.

[0017] Furthermore, in the above-mentioned slope mesh spraying support construction device, a transmission member is embedded and installed in the through hole opened in the support beam, the transmission member is sleeved on the output end of the second motor, the second motor is fixedly connected to the fixed plate, and the fixed plate is fixedly connected to the support beam.

[0018] The second technical solution provided by the present invention is a slope hanging mesh shotcrete support construction method, comprising the following steps: step one, construction preparation; step two, earth excavation; step three, measurement and layout; step four, inserting reinforcement and reinforcing reinforcement welding; step five, grid installation; step six, spraying concrete; step seven, repeating the process until the end;

[0019] Among them, in the above step six, firstly, concrete mixing preparation is carried out, by starting the first motor to drive the reducer to rotate, the reducer rotation drives the connecting piece to rotate, the connecting piece rotation drives the turntable to rotate on the slot hole opened in the bottom plate, and then drives the mixing barrel to rotate, and at the same time, the second motor is started to drive the transmission member to rotate in the through hole opened in the support beam, the transmission member rotation drives the stirring shaft and the stirring rod to rotate, the first motor and the second motor rotate in opposite directions, that is, the stirring shaft and the stirring barrel rotate in opposite directions, and at the same time, the arc-shaped member arranged on the inner wall of the mixing barrel is cooperated to stir and mix the concrete, after the concrete mixing is completed, the concrete is extracted from the mixing barrel through the extraction pipe, and then the concrete is sprayed out from the spraying port through the spraying machine body to spray the slope surface, the spraying concrete operation should be carried out in sections and pieces in sequence, and the spraying sequence in the same section should be from bottom to top, the thickness of the first spraying is 80mm, and the second time is 70mm, when spraying, the nozzle should be as vertical as possible to the sprayed surface, the distance should be 0.6-1.2m, and the nozzle should be spirally advanced with a diameter of 30-50cm.

[0020] The concrete comprises the following materials in a mass ratio: 42.5R silicate cement, fine aggregate, coarse aggregate with a particle size less than 15 mm, water, naphthalenesulfonate formaldehyde condensate, and sodium sulfate in a mass ratio of 500:800:800:200:3:5.

[0021] Furthermore, in the above-mentioned slope hanging mesh spraying support construction method, the spraying working air pressure is 120-180Pa, and the conveying distance is 40-60m; for the reinforcement insertion position, the bottom of the reinforcement should be sprayed first, and then the top of the reinforcement should be sprayed.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The technical solution provided by the present invention starts the first motor to drive the reducer to rotate, the reducer rotation drives the connecting piece to rotate, the connecting piece rotation drives the turntable to rotate on the slot hole opened on the bottom plate, and then drives the mixing barrel to rotate, and at the same time the second motor starts to drive the transmission piece to rotate in the through hole opened in the support beam, the transmission piece rotation drives the stirring shaft and the stirring rod to rotate, the first motor and the second motor rotate in opposite directions, that is, the stirring shaft and the stirring barrel rotate in opposite directions, and at the same time cooperate with the arc-shaped piece arranged on the inner wall of the mixing barrel to stir and mix the concrete, effectively improving the mixing efficiency, and avoiding uneven mixing and affecting the construction process;

[0024] 2. The technical solution provided by the present invention comprises a bottom kit and a top kit fixedly connected between the support frame and the support beam, and a first spring is arranged between the bottom kit and the top kit to weaken the vibration sound generated by the operation of the second motor and the rotation of the stirring rod, thereby preliminarily reducing the noise of the device operation, and then the vibration generated by the operation and rotation of the first motor and the stirring barrel is transmitted to the top member through the support member, and then transmitted to the second spring and the bottom member through the top member, and after the vibration is weakened by the second spring, it is transmitted to the ground through the bottom member, which effectively reduces the vibration generated during the operation of the equipment, thereby reducing the noise of the equipment operation, optimizing the construction environment, and helping to improve the enthusiasm of the workers.

[0025] 3. During the construction process of the technical solution provided by the present invention, according to the design drawings, the measuring tools are used to determine the rebar insertion positions and after the layout is completed, the rebar insertion is completed by the direct insertion process, which eliminates the drilling process and optimizes the construction process when the slope protection soil is appropriate, reduces construction costs, and improves construction efficiency.

[0026] 4. The main components of the sprayed concrete of the technical solution involved in the present invention include 42.5R Portland cement, fine aggregate, coarse aggregate, naphthalenesulfonate formaldehyde condensate and sodium sulfate; the concrete significantly improves its anti-seepage performance through the reasonable proportion of the above components, and effectively reduces the erosion of water on the slope. In addition, the concrete exhibits high strength, high toughness and excellent impact resistance, thereby enhancing the long-term stability of the slope and extending the service life of the project. At the same time, the concrete is more closely combined with the hanging net during the spraying process, further enhancing the overall stability of the slope protection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a front view of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the position structure of the arc-shaped member in the present invention;

[0029] Figure 3 It is a schematic diagram of the position structure of the first spring in the present invention;

[0030] Figure 4It is a structural schematic diagram of the efficiency improvement component in the present invention;

[0031] Figure 5 It is a partial structural schematic diagram of the noise reduction component in the present invention;

[0032] Figure 6 is a flow chart of the method of the present invention;

[0033] In the figure: 1. bottom plate; 2. efficiency improvement component; 3. support frame; 4. noise reduction component; 5. support beam; 6. support member; 7. fixed plate; 8. second motor; 9. transmission member; 10. stirring shaft; 11. stirring rod; 12. arc member; 13. discharge port; 14. stirring barrel; 15. valve; 16. support pad; 17. support sheet metal member; 21. turntable; 22. connecting member; 23. reducer; 24. first motor; 25. motor support; 31. extraction pipe; 32. spraying machine body; 33. control console; 34. spraying port; 41. bottom kit; 42. top kit; 43. first spring; 44. top member; 45. positioning member; 46. limit member; 47. bottom member; 48. positioning telescopic rod; 49. second spring. DETAILED DESCRIPTION

[0034] 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.

[0035] Example 1

[0036] Please see attached Figure 1 -Attached Figure 4 An embodiment of the present invention is as follows: a slope mesh spraying support construction device comprises a base plate 1, an efficiency-enhancing component 2 and a noise-reducing component 4. A turntable 21 in the efficiency-enhancing component 2 is rotatably connected in a slot hole provided in the base plate 1, a connecting member 22 is fixedly connected in a slot hole provided in the turntable 21, and the connecting member 22 is sleeved on an output end of a reducer 23. A support frame 3 is fixedly connected to the base plate 1, a support pad 16 is fixedly connected to one side of the support frame 3, and a supporting sheet metal part is fixedly connected between the support pad 16 and the support frame 3. 17, the support frame 3 is fixedly connected with the bottom kit 41 in the noise reduction component 4, the bottom kit 41 is sleeved with the top kit 42, the top kit 42 is fixedly connected with the support beam 5, the bottom of the bottom plate 1 is fixedly connected with the support member 6, the slot hole opened at the bottom of the support member 6 is fixedly connected with the top member 44, the top member 44 is fixedly connected with the positioning member 45, the positioning member 45 is sleeved with the limiting member 46, the limiting member 46 is fixedly connected to the bottom member 47, and the limiting member 46 is used to limit the movement range of the positioning member 45;

[0037] The efficiency improvement component 2 is composed of a turntable 21, a connecting piece 22, a reducer 23, a first motor 24 and a motor support 25. The output end of the reducer 23 is rotatably connected to a through hole provided in the bottom plate 1. The input end of the reducer 23 is sleeved with the output end of the first motor 24. The first motor 24 is fixedly connected to the inside of the motor support 25. The motor support 25 is fixedly connected to the bottom of the bottom plate 1. The motor support 25 is used to support and fix the first motor 24.

[0038] A mixing barrel 14 is fixedly connected to the turntable 21. An arc-shaped member 12 is provided on the inner side of the mixing barrel 14. The arc-shaped member 12 is arranged in the middle part of the mixing barrel 14 and does not extend to the bottom to avoid forming a gap with the bottom of the mixing barrel 14 and leaving concrete. The arc-shaped member 12 is used to improve the mixing efficiency of concrete. A discharge port 13 is provided on the side of the mixing barrel 14, and a valve 15 is provided on the discharge port 13.

[0039] The noise reduction component 4 is composed of a bottom kit 41, a top kit 42, a first spring 43, a top piece 44, a positioning piece 45, a limiting piece 46, a bottom piece 47, a positioning telescopic rod 48 and a second spring 49. One end of the first spring 43 is fixedly connected to the bottom kit 41, and the other end of the first spring 43 is fixedly connected to the top kit 42. The bottom kit 41 is used to limit the telescopic range of the top kit 42. The first spring 43 is used to reduce the vibration generated during the operation of the support beam 5 and other structures on the support beam 5 to complete the preliminary noise reduction. One end of the positioning telescopic rod 48 is fixedly connected to the top piece 44, and the other end of the positioning telescopic rod 48 is fixedly connected to the bottom piece 47. One end of the second spring 49 is fixedly connected to the bottom piece 47, and the other end of the second spring 49 is fixedly connected to the top piece 44. The second spring 49 is sleeved on the positioning telescopic rod 48. The second spring 49 is used to reduce the vibration generated during the operation of the entire mixing device, and the positioning telescopic rod 48 is used to limit the telescopic range of the second spring 49 to avoid dislocation.

[0040] A transmission member 9 is embedded and installed in the through hole of the support beam 5. The transmission member 9 is sleeved on the output end of the second motor 8. The second motor 8 is fixedly connected to the fixing plate 7. The fixing plate 7 is fixedly connected to the support beam 5. A stirring shaft 10 is sleeved on the transmission member 9. A stirring rod 11 is provided on the stirring shaft 10.

[0041] A spraying machine body 32 is fixedly connected to one side of the bottom plate 1 , a spraying port 34 is opened on one side of the spraying machine body 32 , and a control console 33 and a material extraction pipe 31 are fixedly connected to the spraying machine body 32 , and the material extraction pipe 31 is connected to the inside of the mixing barrel 14 .

[0042] It should be noted that the shotcrete machine body described in the present application is a shotcrete machine commonly used in the art.

[0043] Example 2

[0044] Please see attached Figure 5 The invention provides a slope mesh spraying support construction method, which comprises the following steps: step one, construction preparation; step two, earth excavation; step three, measurement and layout; step four, reinforcing bar welding; step five, grid installation; step six, spraying concrete; step seven, repeating the process until the end;

[0045] Step one is as follows: according to the design requirements, clarify the specific construction area of ​​the mesh sprayed anchor support project, remove obstacles such as garbage and trees in the construction area, ensure that the construction area is flat, prepare the required anchor rods, steel mesh (or wire mesh), concrete and other materials, and ensure that the material quality meets the design requirements. The concrete is a 150mm thick C25 reinforced concrete sprayed anchor support surface layer; the steel is a surface layer mesh reinforcement of Φ8@200mm×200mm and a mesh reinforcement of Φ16@2000mm*2000mm.

[0046] The concrete comprises the following materials in a mass ratio: 42.5R silicate cement, fine aggregate, coarse aggregate with a particle size less than 15 mm, water, naphthalenesulfonate formaldehyde condensate, and sodium sulfate in a mass ratio of 500:800:800:200:3:5.

[0047] Step 2 is as follows: excavate the slope mechanically, and the slope excavation is carried out from top to bottom. At the same time, the upper soil nail grouting body and the sprayed concrete surface layer reach 70% of the design strength before the lower soil and lower soil nail construction can be carried out. Each layer of soil nails is an excavation layer, and the excavation depth of each layer should be within 0.5m below the soil nail layer. Support in time and prevent over-excavation; earthwork construction should be carried out in layers, and the thickness of each soil layer should not exceed 2m and the length should not exceed 40m; a certain thickness (20-30cm) of protective layer should be reserved during excavation, and the slope surface should be trimmed manually;

[0048] Step 3 is as follows: according to the design drawings, use measuring tools to determine the location of the rebar and lay out the lines;

[0049] Step 4 is as follows: insert the reinforcement directly by using the insertion reinforcement direct driving process, eliminating the drilling process, and then welding the reinforcement reinforcement; the specific welding operation is to use E43 type welding rod when arc welding Q235 steel and HPB300 grade steel bar, and E50 welding rod should be used for narrow seam welding when welding HRB335 grade steel bar, and E43 welding rod can be used for bar welding or lap welding; the chemical composition and mechanical properties of the weld metal should meet the requirements of (GB / T5117-1995) and (GB / T5118-1995);

[0050] Step 5 is as follows: set up a grid support on the slope protection to ensure that the support is stable and accurately positioned, and then fix the wire mesh (or steel mesh) with high tensile strength on the support to form a preliminary support structure. The wire mesh should be tightly connected with the anchor rod and the grid support to ensure overall stability. Bind the Φ8@200mm×200mm bidirectional steel mesh according to the design requirements, and use bidirectional weaving for reinforcement. The adjacent steel bar joints are staggered by 300mm. After the steel mesh is woven and the anchor pipe is placed, use two threaded steel bars as connecting reinforcement bars to connect the anchor pipes together, and use the threaded steel bars to press tightly on the steel mesh. The steel mesh, connecting bars, inserted bars, and the grid frame are connected by electric welding.

[0051] Step six is ​​as follows: first, mix and prepare concrete, add various materials into the mixing barrel 14 according to the mass ratio of 500:800:800:200:3:5 of 42.5R silicate cement, fine aggregate, coarse aggregate with a particle size less than 15mm, water, naphthalenesulfonate formaldehyde condensate and sodium sulfate, and start the first motor 24 to drive the reducer 23 to rotate, the reducer 23 rotates to drive the connecting member 22 to rotate, the connecting member 22 rotates to drive the turntable 21 to rotate on the slot hole opened in the bottom plate 1, and then drives the mixing barrel 14 to rotate, and at the same time, the second motor 8 is started to drive the transmission member 9 to rotate in the through hole opened in the support beam 5, and the transmission member 9 rotates to drive the stirring shaft 10 and the stirring rod 11 to rotate, the first motor 24 rotates in opposite directions to the second motor 8, that is, the stirring shaft 10 rotates in opposite directions to the mixing barrel 14, and at the same time, the arc-shaped member 12 arranged on the inner wall of the mixing barrel 14 is cooperated to stir and mix the concrete, and after the concrete mixing is completed , concrete is extracted from the mixing barrel 14 through the extraction pipe 31, and then the concrete is sprayed from the spraying port 34 through the spraying machine body 32. For the slope surface spraying concrete, the spraying concrete operation should be carried out in sections and pieces in sequence. The spraying sequence in the same section should be from bottom to top. The thickness of the first spraying is 80mm, and the second is 70mm. When spraying, the nozzle should be as vertical as possible to the sprayed surface, and the distance should be 0.6-1.2m. It should move forward in a spiral shape according to a diameter of 30-50cm; the control of the spraying working air pressure is directed by the sprayer, and the wind pressure is usually adjusted to 120-180Pa, and the conveying distance is 40-60m; for the rebar insertion part, the lower part of the rebar should be sprayed first, and then the upper part of the rebar should be sprayed. The water-cement ratio should be controlled during spraying to keep the concrete surface flat, moist and shiny, without dry spots and slippage and flow; the newly sprayed concrete should be sprayed with water to keep its surface moist. Starting from 2h after the initial setting of the sprayed concrete, the curing period is not less than 14 days;

[0052] In the above step 7, according to the above steps 1 to 6, the operation process is repeated until the construction is completed.

[0053] Working principle: When in use, the first motor 24 is started to drive the reducer 23 to rotate, the reducer 23 rotates to drive the connecting member 22 to rotate, the connecting member 22 rotates to drive the turntable 21 to rotate on the slot opened in the bottom plate 1, and then drives the mixing barrel 14 to rotate, and at the same time the second motor 8 is started to drive the transmission member 9 to rotate in the through hole opened in the support beam 5, the transmission member 9 rotates to drive the stirring shaft 10 and the stirring rod 11 to rotate, the first motor 24 and the second motor 8 rotate in opposite directions, that is, the stirring shaft 10 and the mixing barrel 14 rotate in opposite directions, and at the same time cooperate with the arc member 12 set on the inner wall of the mixing barrel 14 to stir and mix the concrete, effectively improving the mixing efficiency, while avoiding uneven mixing and affecting the construction process; the bottom kit 41 and the top kit 42 are fixedly connected between the support frame 3 and the support beam 5, the bottom kit 41 and the top kit 42 A first spring 43 is arranged between the two parts to weaken the vibration sound generated by the operation of the second motor 8 and the rotation of the stirring rod 11, thereby preliminarily reducing the noise of the device operation; and then the vibration generated by the operation and rotation of the first motor 24 and the stirring barrel 14 is transmitted to the top part 44 through the support part 6, and then transmitted to the second spring 49 and the bottom part 47 through the top part 44; after the vibration is weakened by the second spring 49, it is transmitted to the ground through the bottom part 47, effectively reducing the vibration generated by the operation of the equipment, thereby reducing the noise of the equipment operation, optimizing the construction environment, and helping to improve the enthusiasm of the workers; during the construction process, according to the design drawings, the measuring tools are used to determine the rebar insertion position and after the layout is completed, the rebar is inserted directly into the process, eliminating the drilling process, optimizing the construction process when the slope protection soil is appropriate, reducing the construction cost, and improving the construction efficiency.

[0054] The completed anti-slide piles were inspected and accepted using the methods specified in GB50330-2013 "Technical Code for Construction Slope Engineering", GB0086-2011 "Technical Code for Rock and Soil Anchoring and Sprayed Concrete Support Engineering", GB 50086-2015 "Technical Code for Rock and Soil Anchor and Sprayed Concrete Support Engineering", and all indicators were met.

[0055] The specific test data are as follows:

[0056] 1) Adhesion test

[0057] After 28 days of growth, a hole with a diameter of 100 mm was drilled and three core samples were taken out for pull-out tests between the shotcrete and the rock and between the shotcrete layers. The bond strengths were 1.12 MPa, 1.09 MPa, and 1.23 MPa.

[0058] 2) Concrete strength

[0059] The compressive strength at 1 day is 18.2MPa; the compressive strength at 28 days is 49.26MPa; and the rebound rate is 6.3%.

[0060] 3) Setting time

[0061] Before construction, the setting time of concrete was tested, with initial setting time of 2 minutes and final setting time of 8 minutes.

Claims

1. A slope mesh spraying support construction device, comprising a bottom plate (1), characterized in that: A support frame (3) is fixedly connected to the bottom plate (1), and a noise reduction component (4) is fixedly connected to the support frame (3); an efficiency improvement component (2) is also rotatably connected to the bottom plate (1), and the efficiency improvement component (2) is composed of a turntable (21), a connecting member (22), a reducer (23), a first motor (24) and a motor support (25), and the output end of the reducer (23) is rotatably connected to a through hole provided in the bottom plate (1); a stirring barrel (14) is fixedly connected to the turntable (21); a support beam (5) is provided above the support frame (3), and a transmission member (9) is installed on the support beam (5), and the transmission member (9) is sleeved on the output end of the second motor (8), and a stirring shaft (10) is sleeved on the transmission member (9), and a stirring rod (11) is provided on the stirring shaft (10); A shotcrete machine body (32) is fixedly connected to one side of the base plate (1), a shotcrete opening (34) is provided on one side of the shotcrete machine body (32), and a control console (33) and a material extraction pipe (31) are connected to the shotcrete machine body (32), and the material extraction pipe (31) is connected to the inside of the mixing barrel (14).

2. A slope mesh spraying support construction device according to claim 1, characterized in that: The noise reduction component (4) comprises a bottom component (41), a top component (42), and a first spring (43); one end of the first spring (43) is fixedly connected to the bottom component (41), and the other end of the first spring (43) is fixedly connected to the top component (42); the bottom component (41) is fixedly connected to the support frame (3), and the top component (42) is fixedly connected to the support beam (5).

3. A slope mesh spraying support construction device according to claim 2, characterized in that: The noise reduction component (4) further comprises a top member (44), a positioning member (45), a limiting member (46), a bottom member (47), a positioning telescopic rod (48) and a second spring (49); the bottom of the bottom plate (1) is fixedly connected to a support member (6), a top member (44) is fixedly connected to a slot hole provided at the bottom of the support member (6), a positioning member (45) is fixedly connected to the top member (44), a limiting member (46) is sleeved on the positioning member (45), and the limiting member (46) is fixedly connected to the bottom member (47); one end of the positioning telescopic rod (48) is also fixedly connected to the top member (44), and the other end of the positioning telescopic rod (48) is fixedly connected to the bottom member (47); one end of the second spring (49) is fixedly connected to the bottom member (47), the other end of the second spring (49) is fixedly connected to the top member (44), and the second spring (49) is sleeved on the positioning telescopic rod (48).

4. A slope mesh spraying support construction device according to claim 1, characterized in that: An arc-shaped piece (12) is provided on the inner side of the mixing barrel (14), and a discharge port (13) is provided on the side of the mixing barrel (14), and a valve (15) is provided on the discharge port (13).

5. A slope mesh spraying support construction device according to claim 1, characterized in that: A turntable (21) in the efficiency-enhancing component (2) is rotatably connected to a slot hole provided in the bottom plate (1); a connecting piece (22) is fixedly connected to a slot hole provided in the turntable (21), and the connecting piece (22) is sleeved on an output end of a reducer (23); an output end of a first motor (24) is sleeved on an input end of the reducer (23), and the first motor (24) is fixedly connected to the inside of a motor support (25), and the motor support (25) is fixedly connected to the bottom of the bottom plate (1).

6. A slope mesh spraying support construction device according to claim 1, characterized in that: A support pad (16) is fixedly connected to one side of the support frame (3), and a support sheet metal component (17) is fixedly connected between the support pad (16) and the support frame (3).

7. A slope mesh spraying support construction device according to claim 1, characterized in that: A transmission member (9) is embedded and installed in the through hole formed in the support beam (5); the transmission member (9) is sleeved on the output end of the second motor (8); the second motor (8) is fixedly connected to the fixing plate (7); and the fixing plate (7) is fixedly connected to the support beam (5).

8. A slope mesh spraying support construction method, characterized in that: The following steps are involved: Step 1: Construction preparation; Step 2: earth excavation; Step 3: Measure and lay out; Step 4: welding of inserted ribs and reinforcing ribs; Step 5: Grid installation; Step six, spraying concrete; Step 7, repeat the process until the end; Wherein: in step 4, the reinforcement is inserted by directly driving the reinforcement into the reinforcing bar, eliminating the punching process, and then welding the reinforcement bar; Among them: Step 6, firstly, mixing and preparing concrete is carried out, and the specific method is: starting the first motor (24) drives the reducer (23) to rotate, the reducer (23) rotates to drive the connecting member (22) to rotate, the connecting member (22) rotates to drive the turntable (21) to rotate on the slot hole opened on the bottom plate (1), and then drives the mixing barrel (14) to rotate, and at the same time the second motor (8) starts to drive the transmission member (9) to rotate in the through hole opened in the support beam (5), the transmission member (9) rotates to drive the mixing shaft (10) and the mixing rod (11) to rotate, and the first motor (24) and the second motor (8) rotate in opposite directions, that is, the mixing shaft (10) and the mixing barrel (14) rotate in opposite directions. 14) rotates in the opposite direction, and at the same time cooperates with the arc-shaped member (12) provided on the inner wall of the mixing barrel (14) to mix the concrete. After the concrete mixing is completed; the concrete is extracted from the mixing barrel (14) through the extraction pipe (31), and then the concrete is sprayed out from the spraying port (34) through the spraying machine body (32) to spray the slope surface. The spraying operation should be carried out in sections and pieces in sequence. The spraying sequence in the same section should be from bottom to top. The thickness of the first spraying is 80mm, and the second is 70mm. When spraying, the nozzle should be as vertical as possible to the sprayed surface, and the distance should be 0.6 to 1.2m. The nozzle should move forward in a spiral shape with a diameter of 30 to 50cm.

9. According to the slope mesh spraying support construction method of claim 8, the spraying working air pressure is 120-180Pa, and the conveying distance is 40-60m; at the rebar insertion location, the bottom of the rebar should be sprayed first, and then the top of the rebar should be sprayed.

10. According to the slope mesh spraying support construction method described in claim 8, the concrete comprises the following materials in a mass ratio: 42.5R Portland cement, fine aggregate, coarse aggregate with a particle size less than 15 mm, water, naphthalenesulfonate formaldehyde condensate, and sodium sulfate in a mass ratio of 500:800:800:200:3:5.

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