A construction method for a resistant pavement base

Abstract

The present invention relates to the technical field of road construction, and more particularly to a construction method of an anti-sparse power pavement base, including, step S1, marking and lofting the base soil of the construction section and leveling; step S2, loosening the compacted base soil, measuring the real-time moisture content of the base soil and judging; step S3, paving gravel on the base soil, and then paving crushed stone on the paved gravel; step S4, spraying anti-sparse power curing agent and stirring, and spraying anti-sparse power curing agent and curing after pressure discharge and leveling. The present invention is by loosening the base soil by compacting the base soil, accurately controlling the earthwork volume of the mixing base soil, by measuring the real-time moisture content of the base soil after loosening the soil, and accurately controlling, it is convenient for the curing effect of the anti-sparse power curing agent on the base soil, and the sprayed anti-sparse power curing agent, base soil, gravel and crushed stone are mixed by a road mixer, and then pressure discharge is performed, so that the anti-sparse power curing agent can be fully integrated in the base, and the overall strength of the road base is improved.

Description

Technical Field

[0001] The invention relates to the technical field of road construction, and in particular to a construction method for a resistant pavement base. Background Art

[0002] Traditional highway pavement bases in my country mostly use lime-stabilized materials, cement-stabilized materials, and lime-fly ash-stabilized materials. However, the widespread use of cement-stabilized crushed stone and fly ash-stabilized crushed stone in my country's highway construction will inevitably require the mining of a large amount of stone for the production of cement and lime, as well as the mining of a large amount of sand, gravel, and crushed stone for the construction of pavement bases, which has caused a shortage of sand and gravel in many areas, resulting in a significant increase in the prices of sand, gravel, lime, cement, etc., resulting in high highway construction costs, which has seriously restricted the development speed of my country's highway construction. This problem is particularly prominent in areas without sand and gravel or areas lacking sand and gravel. Therefore, it is an urgent and important task for road construction to adopt certain technical measures in highway engineering to reduce the use of traditional materials such as sand, gravel, and crushed stone in the pavement base as much as possible, make full use of abundant soil resources to construct the pavement base, and replace traditional soil reinforcement materials such as cement and lime in the pavement base.

[0003] As a new type of road construction material, Kangshuli solidifying agent has obvious economic and environmental benefits. Soil solidifying agent can be used in ground projects such as highways, streets, and airports according to different soil types. One of the most widely used uses is in road subgrades. With the strict restrictions on the exploitation of natural resources such as stone, river sand, and mountain sand for environmental protection, the application research of Kangshuli soil solidifying agent replaces traditional road construction materials with artificial synthetic materials, and uses widely distributed soil as the main pavement base material to achieve local materials for highway construction, improve project quality, reduce project costs, save resources and energy, protect the ecological environment, and make highway construction not affected by resources, ecology, and environmental protection; but in the existing soil solidifying agent subgrade construction, due to improper use of soil solidifying agent, the soil solidifying agent subgrade strength is low and the stability is poor, which is far lower than the strength of cement concrete subgrade. Therefore, the pavement base construction using soil solidifying agent has not been widely used. Summary of the invention

[0004] To this end, the present invention provides a construction method for a resistant pavement base layer, which is used to overcome the problem of low strength of the pavement base layer constructed using a soil curing agent in the prior art.

[0005] To achieve the above object, the present invention provides a construction method for a hydrophobic pavement base, comprising:

[0006] Step S1, marking and staking out the construction section, laying out the roadbed edge line and leveling line according to the width of the roadbed design, determining the elevation of the longitudinal and cross sections, marking on the side drill according to the designed layer height, compacting the base soil of the construction section, leveling while compacting, and filling and compacting the potholes;

[0007] Step S2, calculating the loosening thickness according to the earthwork volume required for construction, loosening the compacted base soil according to the loosening thickness, measuring the real-time moisture content of the base soil after loosening, and determining the real-time moisture content according to the first preset moisture content and the second preset moisture content;

[0008] Step S3, when the real-time moisture content of the base soil is between the first preset moisture content and the second preset moisture content, the thickness of the sand layer and the thickness of the stone layer are calculated according to the thickness of the loose soil, and sand and stone are spread on the base soil according to the thickness of the sand layer, and then crushed stone is spread on the spread sand and stone according to the thickness of the stone layer;

[0009] Step S4, spray the diluted anti-repellent curing agent onto the paving gravel, and use a road mixer to mix the loosened base soil, paving sand and gravel, and paving gravel, use a bulldozer to initially release the pressure, and use a grader to level the surface, then spray the anti-repellent curing agent, and use a roller to compact and roll it, and cover it with geotextile for water maintenance.

[0010] Furthermore, in the step S2, the real-time moisture content As of the base soil after loosening is measured, and the real-time moisture content As is compared with the first preset moisture content A1 and the second preset moisture content A2, wherein A1<A2,

[0011] When As<A1, it will be determined that the real-time moisture content of the base soil after loosening is lower than the first preset moisture content, and the initial spraying amount will be adjusted according to the real-time moisture content As to spray the base soil;

[0012] When A1≤As≤A2, the real-time moisture content of the base soil after loosening is determined to be between the first preset moisture content and the second preset moisture content, the thickness of the sand layer and the thickness of the stone layer are calculated according to the thickness of the loosened soil, and the sand and gravel are spread;

[0013] When As>A2, it will be determined that the real-time moisture content of the base soil after loosening is higher than the second preset moisture content, the air-drying cycle will be adjusted according to the real-time moisture content As, and the base soil will be air-dried.

[0014] Furthermore, when it is determined that the real-time moisture content of the base soil after loosening is lower than the first preset moisture content, the preset initial spraying amount Lc is adjusted to Lc', Lc'=(A1 / As)×Lc, and the base soil is sprayed with water with the adjusted initial spraying amount Lc', and the real-time moisture content As' of the base soil after the water spraying is measured, and the above-mentioned operation of comparing the real-time moisture content with the first preset moisture content and the second preset moisture content and adjusting the preset initial spraying amount is repeated until the real-time moisture content of the base soil after the water spraying is As'≥A1, and then the water spraying of the base soil is stopped.

[0015] Furthermore, in the step S2, a drying period Tf and a number of segmented detections C for air-drying the base soil are preset. When it is determined that the real-time moisture content of the base soil after loosening is higher than a second preset moisture content, the drying period Tf for air-drying the base soil is adjusted to Tf', Tf'=Tf×[1+(As-A2) / A2], and the base soil is air-dried with Tf' as the drying period. The segmented detection period Tj is calculated, Tj=Tf' / C, and the real-time moisture content of the base soil is measured after each segmented detection period Tj. The real-time moisture air-drying rate Ve is calculated based on the real-time moisture content As1 of the base soil measured before any segmented detection period and the real-time moisture content As2 of the base soil measured after the segmented detection period, Ve=(As1-As2) / Tj.

[0016] Further, in the step S2, a standard moisture air-drying rate Vb and a standard moisture air-drying rate difference ΔVb are preset, and the real-time moisture air-drying rate difference ΔVe is calculated according to the calculated real-time moisture air-drying rate Ve and the standard moisture air-drying rate Vb within any segmented detection period, ΔVe=|Vb-Ve|, and the real-time moisture air-drying rate difference ΔVe is compared with the standard moisture air-drying rate difference ΔVb.

[0017] When ΔVe≤ΔVb, it is determined that the real-time moisture air-drying rate difference of the base soil air-drying treatment does not exceed the standard moisture air-drying rate difference, and the adjusted air-drying period Tf' is not adjusted;

[0018] When ΔVe>ΔVb, it is determined that the real-time moisture air-drying rate difference of the base soil air-drying treatment has exceeded the standard moisture air-drying rate difference, and the real-time moisture air-drying rate Ve is compared with the standard moisture air-drying rate Vb to determine whether the base soil air-drying treatment should be adjusted.

[0019] Furthermore, when it is determined that the real-time moisture air-drying rate difference ΔVe of the base soil air-drying treatment has exceeded the standard moisture air-drying rate difference ΔVb, the real-time moisture air-drying rate Ve is compared with the standard moisture air-drying rate Vb.

[0020] When Ve<Vb, it is determined that the real-time moisture air-drying rate of the base soil air-drying treatment is lower than the standard moisture air-drying rate, the base soil air-drying treatment will be stopped, the base soil of the base layer will be dehumidified by the blower, and the real-time moisture content As' of the base soil will be detected in real time during the operation of the blower. When the real-time moisture content of the base soil As'≤A2, the blower will be removed;

[0021] When Ve>Vb, it is determined that the real-time moisture air-drying rate of the base soil air-drying treatment is higher than the standard moisture air-drying rate, and the air-drying period Tf' will be adjusted again according to the real-time moisture air-drying rate.

[0022] Furthermore, when it is determined that the real-time moisture air-drying rate Ve of the base soil air-drying treatment is higher than the standard moisture air-drying rate Vb, the completed n segmented detection cycles and the unfinished m segmented detection cycles are determined, wherein n+m=C, and the segmented detection cycle Tj is adjusted to Tj', Tj'=Tj×[1-(Ve-Vb) / Vb], and the real-time moisture content of the base soil is measured after each segmented detection cycle Tj', and the above-mentioned adjustment of the segmented detection cycle is performed based on the comparison between the real-time moisture air-drying rate and the standard moisture air-drying rate, until the air-drying treatment of the base soil is completed after m segmented detection cycles.

[0023] Furthermore, when it is determined that the real-time moisture content of the base soil after loosening the soil is between the first preset moisture content and the second preset moisture content, the sand layer thickness Hw and the stone layer thickness Hv will be calculated according to the loosened soil thickness Ht, wherein Hw=Ht×a1, Hv=Ht×a2, a1 is the sand layer thickness ratio, which takes a value of 1.5, and a1 is the stone layer thickness ratio, which takes a value of 2.5. After calculating the sand layer thickness Hw and the stone layer thickness Hv, sand and gravel are spread on the base soil with the sand layer thickness Hw, and then crushed stone is spread on the spread sand and gravel with the stone layer thickness Hv.

[0024] Furthermore, the sand and gravel are selected from sand and gravel powder with a particle size less than 1.2 mm, and the particle size of the crushed stone is controlled between 5 mm and 20 mm.

[0025] Furthermore, in the step S4, the loosened base soil, the spread sand and gravel, and the spread crushed stone are mixed by a road mixer, and the mixing thickness of the road mixer is not less than the sum of the soil layer height of the loosened base soil, the thickness of the sand layer, and the thickness of the stone layer. The moving speed of the road mixer is set according to the mixing thickness, and the maximum moving speed of the road mixer is not higher than four kilometers per hour; the geotextile is covered and maintained with water, and the maintenance period is not less than seven days.

[0026] Compared with the prior art, the beneficial effect of the present invention lies in that the base soil of the construction section is first compacted, and then the thickness of the part to be loosened is calculated according to the earthwork volume required for construction, so that the earthwork volume of the base soil to be stirred and mixed can be accurately controlled. At the same time, the loosening is carried out after compaction to ensure the compactness of the lower part of the loose soil layer. By measuring the real-time moisture content of the base soil after loosening, and judging the real-time moisture content according to the first preset moisture content and the second preset moisture content, the moisture content of the base soil to be stirred is accurately controlled, which is convenient for the curing effect of the anti-repellent curing agent on the base soil, and the strength of the road base is improved. At the same time, the ratio of the base soil, sand and gravel is accurately controlled, and the sprayed anti-repellent curing agent, base soil, sand and gravel are mixed by a road mixer, and then the pressure is discharged, so that the anti-repellent curing agent can be fully integrated into the base, and after the grader is leveled, the anti-repellent curing agent is sprayed again, so that the surface of the base fully absorbs the anti-repellent curing agent, and the overall strength of the road base is improved.

[0027] Furthermore, by setting a first preset moisture content and a second preset moisture content when detecting the real-time moisture content of the base soil, the real-time moisture content of the base soil in the construction section can be controlled with a unified standard. When the real-time moisture content is lower than the first preset moisture content, it means that the base soil is relatively dry. At this time, the base soil is easily absorbed by the hydrophobic curing agent. Therefore, when the same amount of hydrophobic curing agent is mixed, the hydrophobic curing agent will be insufficiently used, reducing the strength of the base layer. When the real-time moisture content is higher than the second preset moisture content, it means that the base soil is relatively moist. Therefore, the lack of absorption of the hydrophobic curing agent will lead to insufficient bonding between the base soils, affecting the strength of the pavement base layer after construction.

[0028] In particular, when the real-time moisture content is lower than the first preset moisture content, the real-time moisture content of the base soil to be stirred is increased by spraying water on the loosened base soil, and the spraying amount is controlled in real time according to the real-time moisture content. Through repeated detection, comparison and spraying, the real-time moisture content of the base soil can be accurately increased. While ensuring the stability and strength of the pavement base, the use of anti-repellent curing agent can be reduced within a certain range, thereby improving resource utilization.

[0029] In particular, when the real-time moisture content is higher than the second preset moisture content, the base soil of the foundation is allowed to dry naturally by setting a drying cycle, and the real-time moisture drying rate is calculated in real time by setting a segmented detection cycle, so as to accurately control the drying process and avoid negative adjustments caused by excessive drying. This improves construction efficiency while ensuring the strength of the pavement base layer under construction.

[0030] Furthermore, by setting the standard moisture air-drying rate and the standard moisture air-drying rate difference, a standard range of the air-drying rate is formed. The real-time moisture air-drying rate difference is calculated according to the real-time moisture air-drying rate and the standard moisture air-drying rate, and then the real-time moisture air-drying rate difference is compared with the set standard moisture air-drying rate difference. It can quickly determine whether the real-time moisture air-drying rate is within the standard range. At the same time, setting the standard to a certain range can flexibly control the construction progress of the pavement base and ensure the strength of the pavement base according to actual conditions.

[0031] In particular, when the real-time moisture air-drying rate difference exceeds the standard moisture air-drying rate difference, the real-time state of the base soil of the base layer is determined by comparing the real-time moisture air-drying rate with the standard moisture air-drying rate. When the real-time moisture air-drying rate is lower than the standard moisture air-drying rate, there are greater factors affected by the environment, such as air humidity and wind speed. Therefore, the base soil of the base layer is dehumidified by manually controlling the blower to ensure precise control of the moisture content of the base soil while ensuring the construction period of the pavement base layer.

[0032] Furthermore, when the real-time moisture drying rate is higher than the standard moisture drying rate, the unfinished segmented detection cycle is adjusted to shorten the overall drying time, which not only accurately controls the real-time moisture content of the base soil, but also shortens the construction period and improves the construction efficiency of the pavement base.

[0033] Furthermore, by calculating the thickness of the sand layer and the stone layer based on the thickness of the loose soil, the proportion of the mixture during road mixing is accurately controlled, ensuring that the ratio of base soil, sand, gravel and crushed stone is close to 2:3:5, thereby improving the strength of the pavement base. At the same time, by accurately selecting the particle size of sand, gravel and crushed stone, the mixing strength of each mixing material is guaranteed. When the road mixer is mixing, the speed of the road mixer is controlled to ensure that the sprayed anti-repellent curing agent, base soil, sand, gravel and crushed stone are fully mixed, thereby ensuring the strength of the pavement base constructed with soil curing agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a flow chart of the construction method of the anti-repellent pavement base layer described in this embodiment. DETAILED DESCRIPTION

[0035] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0037] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0038] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] See also Figure 1 As shown, it is a flow chart of the construction method of the anti-repellent pavement base according to this embodiment. This embodiment discloses a construction method of the anti-repellent pavement base, including:

[0040] Step S1, marking and staking out the construction section, laying out the roadbed edge line and leveling line according to the width of the roadbed design, determining the elevation of the longitudinal and cross sections, marking on the side drill according to the designed layer height, compacting the base soil of the construction section, leveling while compacting, and filling and compacting the potholes;

[0041] Step S2, calculating the loosening thickness according to the earthwork volume required for construction, loosening the compacted base soil according to the loosening thickness, measuring the real-time moisture content of the base soil after loosening, and determining the real-time moisture content according to the first preset moisture content and the second preset moisture content;

[0042] Step S3, when the real-time moisture content of the base soil is between the first preset moisture content and the second preset moisture content, the thickness of the sand layer and the thickness of the stone layer are calculated according to the thickness of the loose soil, and sand and stone are spread on the base soil according to the thickness of the sand layer, and then crushed stone is spread on the spread sand and stone according to the thickness of the stone layer;

[0043] Step S4, spray the diluted anti-repellent curing agent onto the paving gravel, and use a road mixer to mix the loosened base soil, paving sand and gravel, and paving gravel, use a bulldozer to initially release the pressure, and use a grader to level the surface, then spray the anti-repellent curing agent, and use a roller to compact and roll it, and cover it with geotextile for water maintenance.

[0044] First, the base soil of the construction section is compacted, and then the thickness of the loosened part is calculated according to the earthwork volume required for construction, so that the earthwork volume of the base soil to be mixed can be accurately controlled. At the same time, the loosening is carried out after compaction to ensure the density of the lower part of the loose soil layer. By measuring the real-time moisture content of the base soil after loosening, and judging the real-time moisture content according to the first preset moisture content and the second preset moisture content, the moisture content of the base soil to be mixed is accurately controlled, which is convenient for the solidification effect of the anti-repellent curing agent on the base soil, thereby improving the strength of the road base. At the same time, the proportion of the base soil, sand and gravel is accurately controlled, and the sprayed anti-repellent curing agent, base soil, sand and gravel are mixed by a road mixer, and then the pressure is discharged, so that the anti-repellent curing agent can be fully integrated into the base, and after the grader is leveled, the anti-repellent curing agent is sprayed again, so that the surface of the base fully absorbs the anti-repellent curing agent, thereby improving the overall strength of the road base.

[0045] Specifically, in step S2, the real-time moisture content As of the base soil after loosening is measured, and the real-time moisture content As is compared with the first preset moisture content A1 and the second preset moisture content A2, wherein A1<A2,

[0046] When As<A1, it will be determined that the real-time moisture content of the base soil after loosening is lower than the first preset moisture content, and the initial spraying amount will be adjusted according to the real-time moisture content As to spray the base soil;

[0047] When A1≤As≤A2, the real-time moisture content of the base soil after loosening is determined to be between the first preset moisture content and the second preset moisture content, the thickness of the sand layer and the thickness of the stone layer are calculated according to the thickness of the loosened soil, and the sand and gravel are spread;

[0048] When As>A2, it will be determined that the real-time moisture content of the base soil after loosening is higher than the second preset moisture content, the air-drying cycle will be adjusted according to the real-time moisture content As, and the base soil will be air-dried.

[0049] By setting the first preset moisture content and the second preset moisture content when detecting the real-time moisture content of the base soil, the real-time moisture content of the base soil in the construction section can be controlled with a unified standard. When the real-time moisture content is lower than the first preset moisture content, it means that the base soil is relatively dry. At this time, the base soil is easily absorbed by the hydrophobic curing agent. Therefore, when the same amount of hydrophobic curing agent is mixed, the hydrophobic curing agent will be insufficiently used, reducing the strength of the base layer. When the real-time moisture content is higher than the second preset moisture content, it means that the base soil is relatively moist. Therefore, the lack of absorption of the hydrophobic curing agent will lead to insufficient bonding between the base soils, affecting the strength of the pavement base after construction.

[0050] In this embodiment, the first preset moisture content A1 is 12%, and the second preset moisture content A2 is 14%. When the moisture content of the base soil is controlled, the optimal moisture content is 13%. At the same time, the moisture content of the base soil should be set according to the actual soil conditions of the construction and the type of the anti-soothing curing agent used. The optimal volume ratio of the commonly used anti-soothing soil curing agent to the base soil is 1 to 3500.

[0051] Specifically, when it is determined that the real-time moisture content of the base soil after loosening is lower than the first preset moisture content, the preset initial spraying amount Lc is adjusted to Lc', Lc'=(A1 / As)×Lc, and the base soil is sprayed with water with the adjusted initial spraying amount Lc', and the real-time moisture content As' of the base soil after the water spraying is measured, and the above-mentioned operation of comparing the real-time moisture content with the first preset moisture content and the second preset moisture content and adjusting the preset initial spraying amount is repeated until the real-time moisture content of the base soil after the water spraying is As'≥A1, and then the base soil is stopped from being sprayed with water.

[0052] When the real-time moisture content is lower than the first preset moisture content, the real-time moisture content of the base soil to be stirred is increased by spraying water on the loosened base soil, and the spraying amount is controlled in real time according to the real-time moisture content. The real-time moisture content of the base soil can be accurately increased through repeated detection, comparison and spraying. While ensuring the stability and strength of the pavement base, the use of anti-repellent curing agent can be reduced within a certain range, thereby improving resource utilization.

[0053] Specifically, in step S2, the drying period Tf of the base soil air-drying treatment and the number of segmented detections C are preset. When it is determined that the real-time moisture content of the base soil after loosening is higher than the second preset moisture content, the drying period Tf of the base soil air-drying treatment is adjusted to Tf', Tf'=Tf×[1+(As-A2) / A2], and the base soil is air-dried with Tf' as the drying period, the segmented detection period Tj is calculated, Tj=Tf' / C, and the real-time moisture content of the base soil is measured after each segmented detection period Tj. The real-time moisture air-drying rate Ve is calculated based on the real-time moisture content As1 of the base soil measured before any segmented detection period and the real-time moisture content As2 of the base soil measured after the segmented detection period, Ve=(As1-As2) / Tj.

[0054] When the real-time moisture content is higher than the second preset moisture content, the base soil of the foundation is allowed to dry naturally by setting a drying cycle. The real-time moisture drying rate is calculated in real time by setting a segmented detection cycle, and the drying process is accurately controlled to avoid negative adjustments caused by excessive drying. This improves construction efficiency while ensuring the strength of the pavement base layer under construction.

[0055] Specifically, in step S2, a standard moisture air-drying rate Vb and a standard moisture air-drying rate difference ΔVb are preset, and the real-time moisture air-drying rate difference ΔVe is calculated according to the calculated real-time moisture air-drying rate Ve and the standard moisture air-drying rate Vb within any segmented detection period, ΔVe=|Vb-Ve|, and the real-time moisture air-drying rate difference ΔVe is compared with the standard moisture air-drying rate difference ΔVb.

[0056] When ΔVe≤ΔVb, it is determined that the real-time moisture air-drying rate difference of the base soil air-drying treatment does not exceed the standard moisture air-drying rate difference, and the adjusted air-drying period Tf' is not adjusted;

[0057] When ΔVe>ΔVb, it is determined that the real-time moisture air-drying rate difference of the base soil air-drying treatment has exceeded the standard moisture air-drying rate difference, and the real-time moisture air-drying rate Ve is compared with the standard moisture air-drying rate Vb to determine whether the base soil air-drying treatment should be adjusted.

[0058] By setting the standard moisture air-drying rate and the standard moisture air-drying rate difference, a standard range of the air-drying rate is formed. The real-time moisture air-drying rate difference is calculated according to the real-time moisture air-drying rate and the standard moisture air-drying rate. Then, the real-time moisture air-drying rate difference is compared with the set standard moisture air-drying rate difference. It can quickly determine whether the real-time moisture air-drying rate is within the standard range. At the same time, setting the standard to a certain range can flexibly control the construction progress of the pavement base and ensure the strength of the pavement base according to actual conditions.

[0059] Specifically, when it is determined that the real-time moisture air-drying rate difference ΔVe of the base soil air-drying treatment has exceeded the standard moisture air-drying rate difference ΔVb, the real-time moisture air-drying rate Ve is compared with the standard moisture air-drying rate Vb.

[0060] When Ve<Vb, it is determined that the real-time moisture air-drying rate of the base soil air-drying treatment is lower than the standard moisture air-drying rate, the base soil air-drying treatment will be stopped, the base soil of the base layer will be dehumidified by the blower, and the real-time moisture content As' of the base soil will be detected in real time during the operation of the blower. When the real-time moisture content of the base soil As'≤A2, the blower will be removed;

[0061] When Ve>Vb, it is determined that the real-time moisture air-drying rate of the base soil air-drying treatment is higher than the standard moisture air-drying rate, and the air-drying period Tf' will be adjusted again according to the real-time moisture air-drying rate.

[0062] When the real-time moisture drying rate difference exceeds the standard moisture drying rate difference, the real-time moisture drying rate is compared with the standard moisture drying rate to determine the real-time state of the base soil. When the real-time moisture drying rate is lower than the standard moisture drying rate, there are greater factors affected by the environment, such as air humidity and wind speed. Therefore, the base soil of the base is dehumidified by manually controlling the blower to ensure precise control of the moisture content of the base soil while ensuring the construction period of the pavement base.

[0063] Specifically, when it is determined that the real-time moisture air-drying rate Ve of the base soil air-drying treatment is higher than the standard moisture air-drying rate Vb, the completed n segmented detection cycles and the unfinished m segmented detection cycles are determined, where n+m=C, and the segmented detection cycle Tj is adjusted to Tj', Tj'=Tj×[1-(Ve-Vb) / Vb], and the real-time moisture content of the base soil is measured after each segmented detection cycle Tj', and the above-mentioned adjustment of the segmented detection cycle is performed based on the comparison between the real-time moisture air-drying rate and the standard moisture air-drying rate, until the base soil is air-dried after m segmented detection cycles.

[0064] When the real-time moisture drying rate is higher than the standard moisture drying rate, the unfinished segmented detection cycle is adjusted to shorten the overall drying time. This not only accurately controls the real-time moisture content of the base soil, but also shortens the construction period and improves the construction efficiency of the pavement base.

[0065] Specifically, after determining that the real-time moisture content of the base soil after loosening the soil is between the first preset moisture content and the second preset moisture content, the sand layer thickness Hw and the stone layer thickness Hv will be calculated according to the loosened soil thickness Ht, wherein Hw=Ht×a1, Hv=Ht×a2, a1 is the sand layer thickness ratio, which takes a value of 1.5, and a1 is the stone layer thickness ratio, which takes a value of 2.5. After calculating the sand layer thickness Hw and the stone layer thickness Hv, sand and gravel are spread on the base soil with the sand layer thickness Hw, and then crushed stone is spread on the spread sand and gravel with the stone layer thickness Hv.

[0066] Specifically, the sand and gravel are selected from sand and gravel powder with a particle size less than 1.2 mm, and the particle size of the crushed stone is controlled between 5 mm and 20 mm.

[0067] Specifically, in step S4, the loosened base soil, the spread sand and gravel, and the spread crushed stone are mixed by a road mixer, and the mixing thickness of the road mixer is not less than the sum of the soil layer height of the loosened base soil, the thickness of the sand layer, and the thickness of the stone layer. The moving speed of the road mixer is set according to the mixing thickness, and the maximum moving speed of the road mixer is not higher than four kilometers per hour; the geotextile is covered and maintained with water, and the maintenance period is not less than seven days.

[0068] The thickness of the sand layer and the stone layer are calculated by the thickness of the loose soil, and the proportion of the mixture during road mixing is accurately controlled, ensuring that the ratio of base soil, sand and gravel, and crushed stone is close to 2:3:5, thereby improving the strength of the road base. At the same time, by accurately selecting the particle size of sand and gravel, the mixing strength of each mixing material is guaranteed. When the road mixer is mixing, the speed of the road mixer is controlled to ensure that the sprayed anti-repellent curing agent, base soil, sand and gravel, and crushed stone are fully mixed, thereby ensuring the strength of the road base constructed with soil curing agent. The anti-repellent soil curing agent is used instead of traditional road construction materials, and the base soil of the construction section is used as the main road base material, so as to achieve local materials for highway construction, improve project quality, reduce project cost, save resources and energy, protect the ecological environment, and ensure that the road base construction is not affected by resources, ecology, and environmental protection.

[0069] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A construction method for a resistant pavement base, characterized in that: include, Step S1, marking and staking out the construction section, laying out the roadbed edge line and leveling line according to the width of the roadbed design, determining the elevation of the longitudinal and cross sections, marking on the side drill according to the designed layer height, compacting the base soil of the construction section, leveling while compacting, and filling and compacting the potholes; Step S2, calculating the loosening thickness according to the earthwork volume required for construction, loosening the compacted base soil according to the loosening thickness, measuring the real-time moisture content of the base soil after loosening, and determining the real-time moisture content according to the first preset moisture content and the second preset moisture content; Measure the real-time moisture content As of the base soil after loosening, and compare the real-time moisture content As with the first preset moisture content A1 and the second preset moisture content A2, wherein A1<A2, When As<A1, it will be determined that the real-time moisture content of the base soil after loosening is lower than the first preset moisture content, and the initial spraying amount will be adjusted according to the real-time moisture content As to spray the base soil; When A1≤As≤A2, the real-time moisture content of the base soil after loosening is determined to be between the first preset moisture content and the second preset moisture content, the thickness of the sand layer and the thickness of the stone layer are calculated according to the thickness of the loosened soil, and the sand and gravel are spread; When As>A2, it will be determined that the real-time moisture content of the base soil after loosening is higher than the second preset moisture content, and the air-drying cycle will be adjusted according to the real-time moisture content As, and the base soil will be air-dried; When it is determined that the real-time moisture content of the base soil after loosening is lower than the first preset moisture content, the preset initial spraying amount Lc is adjusted to Lc', Lc'=(A1 / As)×Lc, and the base soil is sprayed with water with the adjusted initial spraying amount Lc', and the real-time moisture content As' of the base soil after the water spraying is measured, and the above operation of comparing the real-time moisture content with the first preset moisture content and the second preset moisture content and adjusting the preset initial spraying amount is repeated until the real-time moisture content of the base soil after the water spraying is As'≥A1, and the base soil is stopped from being sprayed with water; The air-drying period Tf and the number of segmented detections C for air-drying the base soil are preset. When it is determined that the real-time moisture content of the base soil after loosening is higher than the second preset moisture content, the air-drying period Tf for air-drying the base soil is adjusted to Tf', Tf'=Tf×[1+(As-A2) / A2], and the base soil is air-dried with Tf' as the air-drying period, the segmented detection period Tj is calculated, Tj=Tf' / C, and the real-time moisture content of the base soil is measured after each segmented detection period Tj, and the real-time moisture air-drying rate Ve is calculated according to the real-time moisture content As1 of the base soil measured before any segmented detection period and the real-time moisture content As2 of the base soil measured after the segmented detection period, Ve=(As1-As2) / Tj; Step S3, when the real-time moisture content of the base soil is between the first preset moisture content and the second preset moisture content, the thickness of the sand layer and the thickness of the stone layer are calculated according to the thickness of the loose soil, and sand and stone are spread on the base soil according to the thickness of the sand layer, and then crushed stone is spread on the spread sand and stone according to the thickness of the stone layer; Step S4, spray the diluted anti-repellent curing agent onto the paving gravel, and use a road mixer to mix the loosened base soil, paving sand and gravel, and paving gravel, use a bulldozer to initially release the pressure, and use a grader to level the surface, then spray the anti-repellent curing agent, and use a roller to compact and roll it, and cover it with geotextile for water maintenance.

2. The construction method of the anti-scavenging force pavement base according to claim 1, characterized in that: In step S2, a standard moisture air-drying rate Vb and a standard moisture air-drying rate difference ΔVb are preset, and the real-time moisture air-drying rate difference ΔVe is calculated according to the calculated real-time moisture air-drying rate Ve and the standard moisture air-drying rate Vb within any segmented detection period, ΔVe=|Vb-Ve|, and the real-time moisture air-drying rate difference ΔVe is compared with the standard moisture air-drying rate difference ΔVb. When ΔVe≤ΔVb, it is determined that the real-time moisture air-drying rate difference of the base soil air-drying treatment does not exceed the standard moisture air-drying rate difference, and the adjusted air-drying period Tf' is not adjusted; When ΔVe>ΔVb, it is determined that the real-time moisture air-drying rate difference of the base soil air-drying treatment has exceeded the standard moisture air-drying rate difference, and the real-time moisture air-drying rate Ve is compared with the standard moisture air-drying rate Vb to determine whether the base soil air-drying treatment should be adjusted.

3. The construction method of the anti-scavenging force pavement base according to claim 2, characterized in that: When it is determined that the real-time moisture air-drying rate difference ΔVe of the base soil air-drying treatment has exceeded the standard moisture air-drying rate difference ΔVb, the real-time moisture air-drying rate Ve is compared with the standard moisture air-drying rate Vb. When Ve<Vb, it is determined that the real-time moisture air-drying rate of the base soil air-drying treatment is lower than the standard moisture air-drying rate, the base soil air-drying treatment will be stopped, the base soil of the base layer will be dehumidified by the blower, and the real-time moisture content As' of the base soil will be detected in real time during the operation of the blower. When the real-time moisture content of the base soil As'≤A2, the blower will be removed; When Ve>Vb, it is determined that the real-time moisture air-drying rate of the base soil air-drying treatment is higher than the standard moisture air-drying rate, and the air-drying period Tf' will be adjusted again according to the real-time moisture air-drying rate.

4. The construction method of the anti-scavenging force pavement base according to claim 3 is characterized in that: When it is determined that the real-time moisture air-drying rate Ve of the base soil air-drying treatment is higher than the standard moisture air-drying rate Vb, determine the completed n segmented detection cycles and the unfinished m segmented detection cycles, where n+m=C, adjust the segmented detection cycle Tj to Tj', Tj'=Tj×[1-(Ve-Vb) / Vb], and measure the real-time moisture content of the base soil after each segmented detection cycle Tj', and perform the above-mentioned adjustment of the segmented detection cycle based on the comparison between the real-time moisture air-drying rate and the standard moisture air-drying rate, until the base soil is air-dried after m segmented detection cycles.

5. The construction method of the anti-scavenging force pavement base according to claim 1, characterized in that: When it is determined that the real-time moisture content of the base soil after loosening the soil is between the first preset moisture content and the second preset moisture content, the sand layer thickness Hw and the stone layer thickness Hv will be calculated according to the loose soil thickness Ht, wherein Hw=Ht×a1, Hv=Ht×a2, a1 is the sand layer thickness ratio, which takes a value of 1.5, a1 is the stone layer thickness ratio, which takes a value of 2.

5. After calculating the sand layer thickness Hw and the stone layer thickness Hv, sand and gravel are spread on the base soil with the sand layer thickness Hw, and then crushed stone is spread on the spread sand and gravel with the stone layer thickness Hv.

6. The construction method of the anti-scavenging force pavement base according to claim 1, characterized in that: The sand and gravel are selected from sand and gravel powder with a particle size less than 1.2 mm, and the particle size of the crushed stone is controlled between 5 mm and 20 mm.

7. The construction method of the anti-sludge pavement base according to claim 1, characterized in that: In step S4, the loosened base soil, the spread sand and gravel, and the spread crushed stone are mixed by a road mixer, the mixing thickness of the road mixer is not less than the sum of the soil layer height of the loosened base soil, the thickness of the sand layer, and the thickness of the stone layer, the moving speed of the road mixer is set according to the mixing thickness, and the maximum moving speed of the road mixer is not higher than four kilometers per hour; the geotextile is covered and maintained with water, and the maintenance period is not less than seven days.

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