Aeolian sand roadbed dry pressing process

Abstract

The invention provides a dry pressing process for an aeolian sand roadbed, and relates to the technical field of road construction. The dry pressing process for the aeolian sand roadbed comprises the following steps: pretreating the roadbed so as to enable the roadbed to have a flat roadbed surface; performing static pressure on the roadbed; paving the aeolian sand on the roadbed in layers, and compacting the aeolian sand by adopting a bulldozer; performing preliminary static pressure, vibration rolling and final static pressure on the aeolian sand in sequence to form an aeolian sand layer; and the compactness of the aeolian sand layer is detected. Through the steps, aeolian sand particles can be effectively embedded and extruded in the rolling process, so that the roadbed compactness and stability are improved, compared with a traditional construction method, under the same material condition, the roadbed bearing capacity can be remarkably improved, the problem that water resources are insufficient in arid and water-deficient areas is effectively solved, the construction cost is reduced, and the construction period is shortened. And meanwhile, the defects that the drying period is long and the weather restriction is large due to water spraying are overcome, and the construction efficiency and the construction period controllability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of road construction, in particular to a dry compaction process for aeolian sand roadbed. Background Art

[0002] In deserts or areas with strong winds and sand, aeolian sand is an abundant material for roadbed construction. Traditional aeolian sand roadbed construction usually relies on wet process, that is, rolling after a large amount of watering. However, this method has many disadvantages. For example, in arid and water-scarce areas, water resources are difficult to obtain and costly, and it is difficult to use a large amount of water continuously. In addition, the drying process after watering is long and is easily affected by climatic conditions (such as temperature, humidity and wind speed), which may lead to delays in construction. In addition, wet construction also has certain limitations in terms of compaction effect, and it is difficult to accurately control the compaction and stability of the roadbed, which in turn affects the quality and durability of the road project. Therefore, it is urgent to develop a dry-pressing construction method for aeolian sand roadbed that does not require a large amount of watering. Summary of the invention

[0003] The present invention provides a dry compaction process for aeolian sand roadbed, which can effectively solve the problem of insufficient water resources in arid and water-deficient areas, reduce construction costs, and avoid the disadvantages of long drying period and large climate constraints caused by watering, thereby improving construction efficiency and controllability of construction period.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In a first aspect, the present invention provides a process for dry compaction of aeolian sand roadbed, the process for dry compaction of aeolian sand roadbed comprising:

[0006] Pre-treating the roadbed so that the roadbed has a flat roadbed surface;

[0007] statically pressing the roadbed;

[0008] Spreading the aeolian sand in layers on the roadbed, and compacting the aeolian sand using a bulldozer;

[0009] The aeolian sand is subjected to preliminary static compaction, vibration rolling compaction and final static compaction in sequence to form an aeolian sand layer;

[0010] The compaction degree of the aeolian sand layer is detected.

[0011] In an optional embodiment, the statically pressing the roadbed comprises:

[0012] The roadbed is preliminarily rolled using a light roller for 2 to 3 times, so that the compaction degree of the roadbed is greater than or equal to 90%.

[0013] In an optional embodiment, the preliminary rolling of the roadbed by a light roller comprises:

[0014] During the rolling process, a detection instrument is used to detect the flatness of the roadbed so that the deviation of the flatness of the roadbed is within ±10mm.

[0015] In an optional embodiment, the step of sequentially performing preliminary static compaction, vibration rolling, and final static compaction on the aeolian sand to form an aeolian sand layer comprises:

[0016] The aeolian sand is initially rolled using a heavy roller at a speed of 2km / h to 3km / h, and the number of rolling times is 1 to 2 times.

[0017] In an optional embodiment, the step of sequentially performing preliminary static compaction, vibration rolling, and final static compaction on the aeolian sand to form an aeolian sand layer comprises:

[0018] A heavy roller is used to roll the aeolian sand at a vibration frequency of 30 Hz to 40 Hz, an amplitude of 1.5 mm to 2.5 mm, and a travel speed of 4 km / h to 5 km / h, and the number of rolling times is 4 to 6 times.

[0019] In an optional embodiment, the step of sequentially performing preliminary static compaction, vibration rolling, and final static compaction on the aeolian sand to form an aeolian sand layer comprises:

[0020] The aeolian sand is finally compacted by a heavy roller at a speed of 2km / h to 3km / h, and the number of compaction times is 1 to 2 times.

[0021] In an optional embodiment, the aeolian sand roadbed dry compaction process further comprises:

[0022] During the rolling process, the road roller is used to roll the aeolian sand from the edge to the center;

[0023] The overlapping width of two adjacent rolling paths formed by the roller is greater than or equal to one third of the wheel width of the roller.

[0024] In an optional embodiment, detecting the compaction degree of the aeolian sand layer includes:

[0025] Using the ring knife method to detect the compaction degree of the aeolian sand layer after rolling;

[0026] If it is detected that the compaction degree does not meet the standard, the detected area is rolled again until the compaction degree of the aeolian sand layer reaches the preset compaction degree.

[0027] In an optional embodiment, the step of detecting the compaction degree of the aeolian sand layer after rolling by using the ring knife method includes:

[0028] On the aeolian sand roadbed, 2 The density of each ring knife method detection point is set.

[0029] In an optional embodiment, the aeolian sand roadbed dry compaction process further comprises:

[0030] shaping the roadbed and the aeolian sand layer;

[0031] laying protective materials on the roadbed and the slope of the aeolian sand layer;

[0032] An asphalt surface seal layer or a cement stabilized gravel seal layer is arranged on the top surface of the aeolian sand layer.

[0033] The beneficial effects of the dry compaction process for aeolian sand roadbed provided by the embodiment of the present invention include: by pre-treating and statically compacting the roadbed to improve the compaction degree of the roadbed and further smoothing the roadbed surface, so as to facilitate subsequent construction and facilitate the compaction and formation of the aeolian sand; by spreading the aeolian sand on the roadbed in layers to ensure that the aeolian sand is spread evenly and avoid obvious segregation; by rolling the spread aeolian sand in a specific static pressure-vibration rolling-static pressure combination mode, and accurately controlling the vibration frequency, amplitude, rolling times and rolling sequence, the aeolian sand is fully utilized. The physical properties of accumulated sand in a dry state can make the aeolian sand particles effectively embedded in the rolling process, thereby improving the compaction and stability of the roadbed. Compared with traditional construction methods, the bearing capacity of the roadbed can be significantly improved under the same material conditions. After the rolling of the aeolian sand layer is completed, the compaction of the aeolian sand layer needs to be tested to ensure that the compaction of the aeolian sand layer is not lower than the design standard. It effectively solves the problem of insufficient water resources in arid and water-scarce areas, reduces construction costs, and at the same time avoids the disadvantages of long drying cycles caused by watering and severe climate constraints, thereby improving construction efficiency and controllability of construction periods. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 A schematic diagram of a process flow for dry compaction of aeolian sand roadbed provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0041] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0042] In deserts or areas with strong winds and sand, aeolian sand is an abundant material for roadbed construction. Traditional aeolian sand roadbed construction usually relies on wet process, that is, rolling after a large amount of watering. However, this method has many disadvantages. For example, in arid and water-scarce areas, water resources are difficult to obtain and costly, and it is difficult to use a large amount of water continuously. In addition, the drying process after watering is long and is easily affected by climatic conditions (such as temperature, humidity and wind speed), which may lead to delays in construction. In addition, wet construction also has certain limitations in terms of compaction effect, and it is difficult to accurately control the compaction and stability of the roadbed, which in turn affects the quality and durability of the road project. Therefore, it is urgent to develop a dry-pressing construction method for aeolian sand roadbed that does not require a large amount of watering.

[0043] Based on the problems existing in the prior art, please refer to Figure 1 In an embodiment of the present invention, a dry compaction process for aeolian sand roadbed is provided, which is applied to aeolian sand roads. Through the dry compaction process for aeolian sand roadbed, the method of large-scale watering in traditional wet construction is abandoned, the problem of insufficient water resources in arid and water-deficient areas is effectively solved, and the construction cost is reduced. At the same time, the disadvantages of long drying period and large climate constraints caused by watering are avoided, thereby improving the construction efficiency and controllability of the construction period.

[0044] In detail, the aeolian sand roadbed dry compaction process includes step S100:

[0045] Step S100, pre-processing the roadbed to make the roadbed have a flat surface.

[0046] First of all, it should be noted that before pre-treating the roadbed, construction preparation is usually required: detailed investigation of the aeolian sand reserves, distribution and surrounding environment of the construction site. In detail, according to the requirements of the engineering design, select suitable construction machinery and equipment, including loaders, bulldozers, graders, vibratory rollers, etc., and ensure that their performance is good and the parameters can be accurately controlled. Conduct preliminary sampling and analysis of aeolian sand, determine its basic indicators such as particle size distribution, mud content, natural water content, and establish a database of aeolian sand material properties.

[0047] After the construction preparation is completed, the roadbed can be pretreated.

[0048] In this embodiment, bulldozers, loaders and other equipment are first used to remove vegetation, humus, garbage and other obstacles within the roadbed range, so as to construct a flat construction working surface on the roadbed surface to facilitate subsequent construction and to facilitate the compaction of subsequent aeolian sand.

[0049] Furthermore, the aeolian sand roadbed dry compaction process provided in this embodiment further includes step S200:

[0050] Step S200, statically pressurizing the roadbed.

[0051] In this embodiment, after the roadbed is cleaned and basically leveled, a road roller is used to perform preliminary rolling on the roadbed to improve the compaction degree of the roadbed and further level the surface of the roadbed, thereby facilitating subsequent construction and compacting and forming the subsequent aeolian sand.

[0052] Furthermore, in this embodiment, step S200 also includes the following sub-steps:

[0053] Sub-step S210, using a light roller to perform preliminary rolling on the roadbed, the number of rolling times is 2 to 3 times, so that the compaction degree of the roadbed is greater than or equal to 90%.

[0054] In this embodiment, the roadbed is rolled at least twice by a light roller to ensure that the compaction degree of the roadbed is greater than or equal to 90%.

[0055] Sub-step S220, using a detection instrument to detect the flatness of the roadbed during the rolling process, so that the deviation of the flatness of the roadbed is within ±10mm.

[0056] In this embodiment, during the rolling process, the roadbed flatness is strictly controlled with the help of measuring instruments such as a level and a total station, so that its deviation is within ±10 mm.

[0057] Furthermore, the aeolian sand roadbed dry compaction process provided in this embodiment further includes step S300:

[0058] Step S300: Spread the aeolian sand in layers on the roadbed and compact it using a bulldozer.

[0059] In this embodiment, it should be noted that firstly, a large dump truck is required to transport the aeolian sand from the material yard to the construction site, and windproof and spill prevention measures are taken during the transportation process, such as covering with tarpaulin.

[0060] After the aeolian sand is transported to the construction site, it is first roughly leveled with the help of a bulldozer, and then finely leveled with a grader to spread the aeolian sand in layers, with the thickness of each layer controlled at 30cm to 50cm. During the spreading process, the angle and height of the grader's scraper are adjusted to ensure that the aeolian sand is spread evenly and avoid obvious segregation.

[0061] Furthermore, the aeolian sand roadbed dry compaction process provided in this embodiment further includes step S400:

[0062] Step S400, performing preliminary static compaction, vibration rolling and final static compaction on the aeolian sand in sequence to form an aeolian sand layer.

[0063] In this embodiment, the spread aeolian sand is rolled in a specific static pressure-vibration rolling-static pressure combination mode, and the vibration frequency, amplitude, rolling times and rolling sequence are precisely controlled, and the physical properties of the aeolian sand in a dry state are fully utilized. The aeolian sand particles can be effectively embedded in the rolling process, thereby improving the compaction and stability of the roadbed. Compared with traditional construction methods, the bearing capacity of the roadbed can be significantly improved under the same material conditions.

[0064] In detail, step S400 includes the following sub-steps:

[0065] In sub-step S410, a heavy roller is used to initially roll the aeolian sand at a speed of 2 km / h to 3 km / h, and the number of rolling times is 1 to 2 times.

[0066] In sub-step S420, a heavy roller is used to roll the aeolian sand at a vibration frequency of 30 Hz to 40 Hz, an amplitude of 1.5 mm to 2.5 mm, and a travel speed of 4 km / h to 5 km / h, for 4 to 6 times.

[0067] In sub-step S430, a heavy roller is used to finally compact the aeolian sand at a speed of 2 km / h to 3 km / h, and the number of compaction times is 1 to 2 times.

[0068] In this embodiment, static compaction is first performed 1 to 2 times, and the driving speed is controlled at 2 km / h to 3 km / h to initially stabilize the aeolian sand; then vibration rolling is performed, the vibration frequency is set at 30 Hz to 40 Hz, the amplitude is controlled at 1.5 mm to 2.5 mm, the rolling times are 4 to 6 times, and the driving speed is gradually increased from 2 km / h to 3 km / h to 4 km / h to 5 km / h to promote full embedding of aeolian sand particles; finally, static compaction is performed 1 to 2 times for finishing treatment, and the driving speed is maintained at 2 km / h to 3 km / h to improve the surface smoothness and compaction effect of the roadbed.

[0069] It should be noted that the light roller and heavy roller mentioned in this embodiment are relative, that is, the weight of the light roller mentioned in this embodiment is less than the weight of the heavy roller mentioned in this embodiment.

[0070] Optionally, the heavy-duty roller of this embodiment has a weight of 18 t to 25 t, and the light-duty roller has a weight less than 18 t to 25 t.

[0071] Furthermore, step S400 also includes the following sub-steps:

[0072] Sub-step S440, during the rolling process, the road roller is used to roll the aeolian sand from the edge to the center.

[0073] In this embodiment, by rolling the wind-blown sand from the edge to the center, the entire road surface structure can be gradually compacted, so that the edge part is stabilized first, and then gradually compacted toward the center, thereby improving the overall stability of the entire roadbed; in addition, rolling from the edge first can ensure that the roadbed edge has sufficient bearing capacity to avoid collapse during subsequent rolling; not only that, wind-blown sand contains a lot of air, which needs to be gradually discharged during the rolling process to achieve a better compaction effect. The method of rolling from the edge to the center helps the air to be discharged from both sides to the middle, making the compaction process more uniform and effective.

[0074] Sub-step S450: The overlapping width of two adjacent rolling paths formed by the roller is greater than or equal to one third of the roller wheel width.

[0075] The overlapping width of two adjacent rolling paths formed by the roller is greater than or equal to one-third of the roller wheel width. The main purpose of this practice is to ensure uniform compaction and flatness of the road surface.

[0076] In detail, if there is not enough overlap between the rolling paths, some areas may be missed, resulting in uneven compaction. By setting the appropriate overlap width, it can be ensured that each area is fully compacted; not only that, the wheels of the roller will leave wheel marks on the road surface during the rolling process, and these wheel marks will affect the flatness of the road surface. The appropriate overlap width can effectively eliminate these wheel marks and make the road surface smoother; overlapping rolling can increase the connection strength between adjacent rolling belts, so that the entire road surface forms a more uniform and continuous whole, and improve the overall stability and bearing capacity; in addition, aeolian sand materials are easy to stratify, and appropriate overlap can reduce the stratification phenomenon between different rolling belts and make the materials more closely combined; finally, it should be noted that overlapping rolling helps to further remove the air in the material, reduce the void ratio, and improve the density of the material; through appropriate overlap, it can be ensured that the pressure of the roller is evenly distributed on the road surface, avoiding excessive or too small local pressure, thereby ensuring the compaction quality of the entire road surface.

[0077] It should be noted that sub-steps S440-S450 and sub-steps 410-430 are parallel embodiments, which can be implemented simultaneously, and sub-steps S440-S450 can also be used in other rolling steps involved in this process.

[0078] Furthermore, the aeolian sand roadbed dry compaction process provided in this embodiment further includes step S500:

[0079] Step S500, detecting the compaction degree of the aeolian sand layer.

[0080] In this embodiment, after the aeolian sand layer is rolled, it is also necessary to detect the compaction degree of the aeolian sand layer to ensure that the compaction degree of the aeolian sand layer is not lower than the design standard.

[0081] In detail, step S500 also includes the following sub-steps:

[0082] Sub-step S510, using a ring knife method to detect the compaction degree of the aeolian sand layer after rolling;

[0083] In this embodiment, the compaction degree of the aeolian sand layer after rolling is tested by the ring knife method, and the aeolian sand roadbed is tested every 200 to 500 m 2 Each density is tested by a knife ring method to ensure that the compaction degree is not less than the design standard. For example, the compaction degree of the wind-blown sand layer on the highway is not less than 96%.

[0084] Sub-step S520: If it is detected that the compaction degree does not meet the standard, the detected area is rolled again until the compaction degree of the aeolian sand layer reaches a preset compaction degree.

[0085] In this embodiment, if the detection finds that the compaction degree does not meet the requirements, the reasons are analyzed in time, such as insufficient rolling times, abnormal moisture content of aeolian sand, etc., and targeted pressure supplementation or other treatment measures are taken until the compaction degree meets the requirements.

[0086] Furthermore, the aeolian sand roadbed dry compaction process provided in this embodiment further includes step S600:

[0087] Step S600, shaping and protecting the roadbed and aeolian sand layer.

[0088] In detail, step S600 includes the following sub-steps:

[0089] Sub-step S610, shaping the roadbed and the aeolian sand layer.

[0090] In this embodiment, according to the design requirements, graders, bulldozers and other equipment are used to shape the roadbed, including setting road humps, trimming slopes, etc., so that the shape of the roadbed meets the design specifications.

[0091] Sub-step S620: laying protective materials on the roadbed and the slope of the aeolian sand layer.

[0092] In this embodiment, in order to prevent the aeolian sand roadbed from being damaged by natural factors such as wind erosion and water erosion, protective materials such as geogrids, grass grids, etc. are laid on the roadbed slope.

[0093] Sub-step S630, providing an asphalt surface seal layer or a cement-stabilized gravel seal layer on the top surface of the aeolian sand layer.

[0094] In this embodiment, an asphalt surface seal layer or a cement-stabilized crushed stone seal layer is provided on the top surface of the aeolian sand roadbed to protect the roadbed, improve the performance of the road surface and extend the service life of the road.

[0095] Specifically, the seal layer can effectively prevent rainwater and other water sources from penetrating into the roadbed, reduce the erosion and softening of the roadbed materials by water, and prevent the roadbed from losing stability and bearing capacity due to excessive moisture. In cold areas, water may freeze and expand in winter after penetrating into the roadbed, causing cracking and damage to the roadbed. The seal layer can reduce the impact of this freeze-thaw cycle and protect the roadbed from frost damage. For dirt roads or gravel roads that are not paved with asphalt or concrete, the seal layer can fix the fine-grained materials on the surface, reduce the dust generated when vehicles are driving, and improve the environmental conditions of the road. The seal layer can fill small pits and uneven places on the surface of the roadbed, improve the flatness of the road surface, and improve driving comfort. The seal layer can enhance the bonding force between the roadbed and the asphalt or concrete surface layer above, and improve the stability of the overall structure. The seal layer can fix the fine-grained materials in the base layer, prevent them from being lost under vehicle driving or wind erosion, and maintain the integrity of the base layer.

[0096] It can be seen that by setting up a sealing layer, the external damage to the roadbed can be reduced, the maintenance frequency and cost can be reduced, and the service life of the road can be extended; and the overall durability of the roadbed can be enhanced, making it more able to withstand the influence of traffic loads and environmental factors.

[0097] In summary, the embodiments of the present invention provide a method that completely gets rid of the dependence of traditional wet construction on water resources, innovatively adopts dry pressing technology, has significant resource advantages and environmental adaptability in arid areas, greatly expands the geographical scope of wind-blown sand roadbed construction, and effectively reduces construction costs and water resource consumption; through a large number of experimental studies and engineering practices, accurately determines various parameters in the process of wind-blown sand dry pressing construction, such as paving thickness, rolling times, vibration frequency, amplitude, etc. The optimized combination of these parameters can give full play to the physical and mechanical properties of wind-blown sand, realize accurate control of roadbed compaction and stability, and significantly improve roadbed quality and durability.

[0098] In view of the characteristics of aeolian sand, traditional construction equipment is optimized and improved. For example, the vibration system of the vibratory roller is adjusted to make its vibration frequency and amplitude more suitable for the compaction requirements of aeolian sand particles; the scraper structure and control system of the grader are modified to improve the uniformity and flatness control ability of aeolian sand paving. These equipment optimization and innovation measures have effectively improved construction efficiency and quality.

[0099] Establish a complete quality inspection and control system for dry compaction of aeolian sand roadbed. Use a combination of multiple inspection methods to achieve real-time monitoring and quality control of the entire construction process. In terms of compaction detection, not only the traditional sand filling method is used, but also the advanced nuclear density meter method is introduced for rapid detection and comparative verification to ensure the accuracy and reliability of the test results. At the same time, timely adjust the construction parameters and processes according to the test data to effectively ensure the stability and consistency of the roadbed construction quality.

[0100] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A dry compaction process for aeolian sand roadbed, characterized in that: The aeolian sand roadbed dry compaction process comprises: Pre-treating the roadbed so that the roadbed has a flat roadbed surface; statically pressing the roadbed; Spreading the aeolian sand in layers on the roadbed, and compacting the aeolian sand using a bulldozer; The aeolian sand is subjected to preliminary static compaction, vibration rolling compaction and final static compaction in sequence to form an aeolian sand layer; The compaction degree of the aeolian sand layer is detected.

2. The dry compaction process for aeolian sand roadbed according to claim 1, characterized in that: The static pressure on the roadbed comprises: The roadbed is preliminarily rolled using a light roller for 2 to 3 times, so that the compaction degree of the roadbed is greater than or equal to 90%.

3. The dry compaction process for aeolian sand roadbed according to claim 2, characterized in that: The preliminary rolling of the roadbed by a light roller comprises: During the rolling process, a detection instrument is used to detect the flatness of the roadbed so that the deviation of the flatness of the roadbed is within ±10mm.

4. The dry compaction process for aeolian sand roadbed according to claim 1, characterized in that: The step of sequentially performing preliminary static compaction, vibration rolling compaction and final static compaction on the aeolian sand to form an aeolian sand layer comprises: The aeolian sand is initially rolled using a heavy roller at a speed of 2km / h to 3km / h, and the number of rolling times is 1 to 2 times.

5. The dry compaction process for aeolian sand roadbed according to claim 1, characterized in that: The step of sequentially performing preliminary static compaction, vibration rolling compaction and final static compaction on the aeolian sand to form an aeolian sand layer comprises: A heavy roller is used to roll the aeolian sand at a vibration frequency of 30 Hz to 40 Hz, an amplitude of 1.5 mm to 2.5 mm, and a travel speed of 4 km / h to 5 km / h, and the number of rolling times is 4 to 6 times.

6. The dry compaction process for aeolian sand roadbed according to claim 1, characterized in that: The step of sequentially performing preliminary static compaction, vibration rolling compaction and final static compaction on the aeolian sand to form an aeolian sand layer comprises: The aeolian sand is finally compacted by a heavy roller at a speed of 2km / h to 3km / h, and the number of compaction times is 1 to 2 times.

7. The dry compaction process for aeolian sand roadbed according to any one of claims 1 to 6, characterized in that: The aeolian sand roadbed dry compaction process also includes: During the rolling process, the road roller rolls the aeolian sand from the edge to the center; The overlapping width of two adjacent rolling paths formed by the roller is greater than or equal to one third of the wheel width of the roller.

8. The dry compaction process for aeolian sand roadbed according to claim 1, characterized in that: Detecting the compaction degree of the aeolian sand layer comprises: Using the ring knife method to detect the compaction degree of the aeolian sand layer after rolling; If it is detected that the compaction degree does not meet the standard, the detected area is rolled again until the compaction degree of the aeolian sand layer reaches the preset compaction degree.

9. The dry compaction process for aeolian sand roadbed according to claim 8, characterized in that: The method of using the ring knife method to detect the compaction degree of the aeolian sand layer after rolling includes: On the aeolian sand roadbed, 2 The density of each ring knife method detection point is set.

10. The dry compaction process for aeolian sand roadbed according to claim 1, characterized in that: The aeolian sand roadbed dry compaction process also includes: shaping the roadbed and the aeolian sand layer; laying protective materials on the roadbed and the slope of the aeolian sand layer; An asphalt surface seal layer or a cement stabilized gravel seal layer is arranged on the top surface of the aeolian sand layer.

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