High-speed roadbed construction method

Abstract

The invention relates to the technical field of road construction, in particular to a high-speed roadbed construction method which comprises the following steps that S1, water spraying devices are arranged on the periphery of a to-be-excavated area; s2, roadbed earthwork is excavated, the excavated earthwork is transported to a designated position, and a water spraying device sprays water to reduce dust; s3, roadbed filling is conducted, specifically, a foundation layer, a gravel layer, a concrete layer and an asphalt layer are sequentially filled, and a water spraying device sprays water for dust falling; s4, roadbed shaping is conducted, and compaction shaping is conducted after filling; in S2 and S3, the water spraying amount of the water spraying device is adjusted according to the air humidity, the higher the air humidity is, the smaller the water spraying amount is, the lower the air humidity is, and the larger the water spraying amount is, the high-speed roadbed construction method can flexibly deal with dust falling work under different humidity conditions, the situation that when the air humidity is high, a construction site is wet and slippery due to excessive water is avoided, and the construction efficiency is improved. And the situation that when the air humidity is low, the water spraying amount is insufficient, and dust raising cannot be effectively restrained is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of road construction, in particular to a high-speed roadbed construction method. Background Art

[0002] During the construction of expressways, the problem of dust always exists and becomes an important factor affecting construction safety and the surrounding environment. Dust not only threatens the health of construction workers and induces respiratory diseases, but also may cause traffic accidents due to reduced visibility, affecting the smoothness of road transportation. In addition, dust will also have a negative impact on the quality of life of surrounding residents, causing environmental pollution and discomfort. Therefore, effective measures are urgently needed at construction sites to control and reduce dust.

[0003] At present, construction units generally use water spraying to suppress dust diffusion. However, the existing water spraying system usually operates with a fixed water spraying volume, lacking the ability to flexibly respond to different environmental conditions. This fixed water spraying volume setting may lead to a series of problems: when the air humidity is high, excess water can easily make the construction site slippery, affecting traffic and safety; and when the air humidity is low, insufficient water spraying will make it impossible to effectively suppress dust. Summary of the invention

[0004] In order to better solve the dust problem in the process of high-speed roadbed construction in the prior art, the present application provides a high-speed roadbed construction method.

[0005] A high-speed roadbed construction method provided by the present invention adopts the following technical solution: A high-speed roadbed construction method comprises the following steps: S1: Set up a water spray device around the area to be excavated; S2: excavating the roadbed and transporting the excavated earth to a designated location. During this process, the water spraying device sprays water to reduce dust; S3: roadbed filling, filling the base layer, crushed stone layer, concrete layer and asphalt layer in sequence, during which the water spraying device sprays water to reduce dust; S4: roadbed shaping, compaction and shaping after filling; In S2 and S3, the water spraying amount of the water spraying device is adjusted according to the air humidity. The higher the air humidity, the smaller the water spraying amount, and the lower the air humidity, the larger the water spraying amount.

[0006] Preferably, in S1, the water spraying device includes a water pump, a water pipe and a nozzle connected in sequence, the water pump is connected to a water source, the water pipe is a hard pipe and is vertically arranged, the nozzle is connected to the top of the water pipe and the water pump is connected to the bottom of the water pipe, and the water pump is connected to a controller and a humidity sensor.

[0007] Preferably, in S1, the water pipe is composed of five small tubes, and the five small tubes of the water pipe are respectively a first tube, a second tube, a third tube, a fourth tube and a fifth tube, the first tube is connected to the water pump, and the fifth tube is connected to the nozzle; in S2, as the construction plane continues to descend, the number of small tubes of the water pipe gradually decreases.

[0008] Preferably, in S3, as the construction plane continues to rise, the number of the small pipes of the water pipe gradually increases.

[0009] Preferably, in S3, when filling the base layer, the gravel layer, the concrete layer and the asphalt layer, the water spraying amount of the nozzle is reduced successively.

[0010] Preferably, in S1, the fifth pipe of the water pipe is provided with a fan, and the blades of the fan face the construction site and are located in front of the nozzle.

[0011] Preferably, in S1, a water tank is provided around the area to be excavated, and the water tank is connected to the water pump as a water source.

[0012] Preferably, in S1, the top of the water tank is open, and a baffle is movably provided on the top of the water tank, and the baffle is used to control the opening or closing of the top of the water tank.

[0013] Preferably, in S1, a motor, a gear and a rack are arranged between the water tank and the baffle, the motor is fixedly arranged on the side wall of the water tank, the gear is coaxially connected to the output shaft of the motor, the baffle is horizontally slidably arranged on the top of the water tank, the rack is arranged on one side of the baffle, and the rack is meshed with the gear.

[0014] Preferably, in S1, the motor is also connected to the controller and the humidity sensor, and a humidity threshold is set in the controller. When the humidity sensor senses that the air humidity is greater than the humidity threshold, the controller controls the motor to open the baffle; when the humidity sensor senses that the air humidity is equal to or less than the humidity threshold, the controller controls the motor to close the baffle.

[0015] The beneficial effects of the present invention are: 1. The water spraying volume of the water spraying device can flexibly cope with the dust suppression work under different humidity conditions. On the one hand, it can avoid excessive moisture causing the construction site to be slippery when the air humidity is high. On the other hand, it can avoid insufficient water spraying volume when the air humidity is low, so that the dust cannot be effectively suppressed; 2. During the excavation process, the construction plane continues to drop, and during the filling process, the construction plane continues to rise. The height of the sprinkler can be adjusted with the construction plane to avoid excessive or insufficient height difference between the sprinkler and the construction plane, thereby maintaining a reasonable height difference and ensuring the effect of water spraying and dust reduction; 3. The amount of water sprayed is adjusted according to the degree of dust in different stages of the filling process. The higher the degree of dust, the greater the amount of water sprayed, and the lower the degree of dust, the smaller the amount of water sprayed, which can more accurately adapt to the dust conditions at each stage of the filling process; 4. The fan can further guide the sprayed water mist to the center of the construction site, and can also disperse the sprayed water mist to improve the atomization effect of the water mist. Moreover, since the fan is set on the water pipe, the heat generated by the fan during operation is easily driven by the water flowing in the water pipe, which improves the heat dissipation effect of the fan and enables the fan to work for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a construction site in an embodiment of the present application; Figure 2 is a schematic diagram of a water spray device in an embodiment of the present application; Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0017] Explanation of the accompanying reference numerals: 1. base layer; 2. gravel layer; 3. concrete layer; 4. asphalt layer; 5. water pump; 6. water pipe; 7. nozzle; 8. fan; 9. water tank; 10. baffle; 11. motor; 12. gear; 13. rack. DETAILED DESCRIPTION

[0018] The following will be combined with the attached Figure 1 -Attached Figure 3 The present invention is further illustrated by the following embodiments.

[0019] This embodiment discloses a method for constructing a highway roadbed.

[0020] Reference Figures 1 to 3 , the high-speed roadbed construction method includes the following steps: S1: Set up a water spray device around the area to be excavated; S2: Excavation of roadbed earthwork and transportation of the excavated earthwork to the designated location. During this process, the water spraying device sprays water to reduce dust; S3: roadbed filling, filling the base layer 1, crushed stone layer 2, concrete layer 3 and asphalt layer 4 in sequence. During this process, the water spraying device sprays water to reduce dust; S4: roadbed shaping, compaction and shaping after filling; In S2 and S3, the water spraying amount of the water spraying device is adjusted according to the air humidity. The higher the air humidity, the smaller the water spraying amount, and the lower the air humidity, the larger the water spraying amount. That is, the relationship between the water spraying amount and the air humidity is: water spraying amount = standard water spraying amount * humidity coefficient.

[0021] Through the above construction method, the water spraying amount of the water spraying device can flexibly cope with the dust reduction work under different humidity conditions. On the one hand, it can avoid excessive moisture causing the construction site to be slippery when the air humidity is high. On the other hand, it can avoid insufficient water spraying when the air humidity is low, so that the dust cannot be effectively suppressed.

[0022] In S1, the water spraying device includes a water pump 5, a water pipe 6 and a nozzle 7 connected in sequence, wherein the water pump 5 is connected to a water source, the water pipe 6 is a hard pipe and is arranged vertically, the nozzle 7 is connected to the top of the water pipe 6 and the water pump 5 is connected to the bottom of the water pipe 6, and the water from the water source passes through the water pipe 6 under the power of the water pump 5 and is finally sprayed out through the nozzle 7, thereby reducing dust on the construction site. Since the length of the construction site is long during the construction of the highway roadbed, multiple water spraying devices are provided, and multiple water spraying devices are arranged at intervals along the length direction of the highway roadbed. Further, the water pump 5 is connected to a controller and a humidity sensor. When the humidity sensor senses a change in humidity, the power of the water pump 5 is controlled by the controller to change accordingly, thereby realizing the control of the water spraying amount. It should be noted that the humidity sensor needs to be set away from the construction site, and the distance needs to be sufficient so that the water sprayed by the water spraying device will not affect the humidity sensor to make a correct judgment on the air humidity, thereby avoiding misjudgment.

[0023] Since the construction plane continues to drop during the earth excavation process, and continues to rise during the filling process, if the height of the water spraying from the nozzle 7 cannot be adjusted along with the construction plane, it is easy to cause the height difference between the nozzle 7 and the construction plane to be too large or too small, and it is impossible to maintain a reasonable height difference, thereby affecting the effect of water spraying to reduce dust. For this reason, the construction method of the present invention also makes the following improvements.

[0024] In S1, the water pipe 6 is composed of multiple sections of small tubes. In the present embodiment, the water pipe 6 has five sections of small tubes, and the five sections of the water pipe 6 are respectively the first tube, the second tube, the third tube, the fourth tube and the fifth tube, wherein the first tube is always connected to the water pump 5, and the fifth tube is always connected to the nozzle 7. In S2, as the construction plane continues to drop, the number of small tubes of the water pipe 6 gradually decreases, and eventually the five sections of small tubes are changed to only the first tube and the fifth tube connected to each other, so as to adapt to the continuous drop of the construction plane and maintain a good dust reduction effect. In S3, as the construction plane continues to rise, the number of small tubes of the water pipe 6 gradually increases, and eventually the first tube and the fifth tube connected to each other are changed to five sections of small tubes connected in sequence, so as to adapt to the continuous rise of the construction plane and maintain a good dust reduction effect. It should be noted that in the present embodiment, the small tubes of the water pipe 6 are spliced ​​with each other by means of threaded connection, so as to improve the sealing performance while achieving the connection.

[0025] In S3, the dust situation of each layer of filling is different. Among them, the base layer 1 is designed to dig and compact the loose soil. During the compaction process, the dust problem is the most serious due to the heavy pressure of the construction machinery and the disturbance of the soil. Although the construction of the crushed stone layer 2 generates less dust than the base layer 1, a certain amount of dust will still be generated during the selection, transportation and laying of the crushed stone. During the construction of the concrete layer 3, the dust situation is relatively light, and dust may be generated mainly during the mixing, transportation and pouring of the concrete. The dust situation of the asphalt layer 4 is usually the lightest, because asphalt is liquid, and a small amount of steam and smoke is mainly generated during the heating and laying process, and the dust is limited. In summary, the dust level is ranked as follows: base layer 1> crushed stone layer 2> concrete layer 3> asphalt layer 4. In order to more accurately adapt to the dust situation at each stage of the filling process, in the present invention, the water spraying amount is adjusted according to the dust level at different stages of the filling process. The higher the dust level, the greater the water spraying amount, and the lower the dust level, the smaller the water spraying amount. That is, the relationship between water spraying volume, air humidity and filling stage is: water spraying volume = standard water spraying volume * humidity coefficient * filling coefficient.

[0026] Furthermore, in S1, the fifth tube of the water pipe 6 is provided with a fan 8, the blades of the fan 8 are facing the construction site and are located in front of the nozzle 7, and are used to further guide the sprayed water mist to the center of the construction site to improve the effect of spraying water to reduce dust. Moreover, the blades of the fan 8 can disperse the sprayed water mist, improve the atomization effect of the water mist, and thus improve the dust reduction effect. In addition, since the fan 8 is arranged on the water pipe 6, the heat generated by the fan 8 during operation is easily driven by the water flowing in the water pipe 6, which improves the heat dissipation effect of the fan 8 and enables the fan 8 to work for a long time.

[0027] In S1, a water tank 9 is arranged around the area to be excavated. The water tank 9 is filled with water recovered and purified during the construction process. In this embodiment, the water tank 9 is used as a water source and is connected to the water pump 5 to achieve the effect of making full use of water resources. The top of the water tank 9 is open, and a baffle 10 is movably arranged on the top of the water tank 9. Specifically, a motor 11, a gear 12 and a rack 13 are arranged between the water tank 9 and the baffle 10. The motor 11 is fixedly arranged on the side wall of the water tank 9, and the gear 12 is coaxially connected to the output shaft of the motor 11. The baffle 10 is horizontally slidably arranged on the top of the water tank 9. The rack 13 is arranged on one side of the baffle 10. The rack 13 is meshed with the gear 12, so that the rotation of the motor 11 can control the baffle 10 to move relative to the top of the water tank 9, thereby opening and closing. When the baffle 10 is opened, the water tank 9 can be replenished with water. When the baffle 10 is closed, the baffle 10 can reduce the evaporation of water in the water tank 9. Furthermore, the motor 11 is also connected to the controller and the humidity sensor. A humidity threshold is set in the controller. When the humidity sensor senses that the air humidity is greater than the humidity threshold, it means that the probability of rain is high. At this time, the controller controls the motor 11 to work to open the baffle 10, so that the water tank 9 can be replenished with rainwater; thereafter, when the humidity sensor senses that the air humidity is equal to or less than the humidity threshold, the controller controls the motor 11 to work to close the baffle 10 again to prevent the evaporation and loss of water in the water tank 9, thereby further improving the utilization effect of water resources.

[0028] The above are all preferred embodiments of the present invention, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for constructing a high-speed roadbed, characterized in that: The following steps are involved: S1: Set up a water spray device around the area to be excavated; S2: excavating the roadbed and transporting the excavated earth to a designated location. During this process, the water spraying device sprays water to reduce dust; S3: roadbed filling, filling the base layer (1), crushed stone layer (2), concrete layer (3) and asphalt layer (4) in sequence, during which the water spraying device sprays water to reduce dust; S4: roadbed shaping, compaction and shaping after filling; In S2 and S3, the water spraying amount of the water spraying device is adjusted according to the air humidity. The higher the air humidity, the smaller the water spraying amount, and the lower the air humidity, the larger the water spraying amount.

2. A method for constructing a highway roadbed according to claim 1, characterized in that: In S1, the water spraying device comprises a water pump (5), a water pipe (6) and a nozzle (7) which are connected in sequence, the water pump (5) is connected to a water source, the water pipe (6) is a hard pipe and is arranged vertically, the nozzle (7) is connected to the top of the water pipe (6) and the water pump (5) is connected to the bottom of the water pipe (6), and the water pump (5) is connected to a controller and a humidity sensor.

3. A method for constructing a highway subgrade according to claim 2, characterized in that: In S1, the water pipe (6) is composed of five small pipes, the five small pipes of the water pipe (6) are respectively a first pipe, a second pipe, a third pipe, a fourth pipe and a fifth pipe, the first pipe is connected to the water pump (5), and the fifth pipe is connected to the nozzle (7); in S2, as the construction plane continues to descend, the number of small pipes of the water pipe (6) gradually decreases.

4. A method for constructing a highway subgrade according to claim 3, characterized in that: In S3, as the construction plane continues to rise, the number of small pipes of the water pipe (6) gradually increases.

5. A method for constructing a highway subgrade according to claim 4, characterized in that: In S3, when filling the base layer (1), the crushed stone layer (2), the concrete layer (3) and the asphalt layer (4), the water spraying amount of the nozzle (7) is reduced successively.

6. A method for constructing a highway roadbed according to claim 5, characterized in that: In S1, the fifth pipe of the water pipe (6) is provided with a fan (8), and the blades of the fan (8) face the construction site and are located in front of the nozzle (7).

7. A method for constructing a highway roadbed according to claim 6, characterized in that: In S1, a water tank (9) is arranged around the area to be excavated, and the water tank (9) is connected to the water pump (5) as a water source.

8. A method for constructing a highway roadbed according to claim 7, characterized in that: In S1, the top of the water tank (9) is open, and a baffle (10) is movably provided on the top of the water tank (9), and the baffle (10) is used to control the opening or closing of the top of the water tank (9).

9. A method for constructing a highway roadbed according to claim 8, characterized in that: In S1, a motor (11), a gear (12) and a rack (13) are arranged between the water tank (9) and the baffle (10); the motor (11) is fixedly arranged on the side wall of the water tank (9); the gear (12) is coaxially connected to the output shaft of the motor (11); the baffle (10) is horizontally slidably arranged on the top of the water tank (9); the rack (13) is arranged on one side of the baffle (10); and the rack (13) is meshed with the gear (12).

10. A method for constructing a highway roadbed according to claim 9, characterized in that: In S1, the motor (11) is also connected to the controller and the humidity sensor. A humidity threshold is set in the controller. When the humidity sensor senses that the air humidity is greater than the humidity threshold, the controller controls the motor (11) to operate so as to open the baffle (10); when the humidity sensor senses that the air humidity is equal to or less than the humidity threshold, the controller controls the motor (11) to operate so as to close the baffle (10).

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