Construction method of road-mixed roller compacted soil

Abstract

The application relates to the technical field of solidified soil mixing, and discloses a road mixing type rolling solidified soil construction method, which comprises the following construction steps: 1) determining a construction area of a road, compacting base soil in the construction area to form a bottom base layer; 2) paving soil material on the bottom base layer; 3) spreading cementing material on the soil material; 4) mixing the soil material and the cementing material to form initial mixed material; 5) mixing a solidified agent and water to form solidified liquid, and spraying the solidified liquid on the initial mixed material; 6) mixing the initial mixed material and the solidified liquid to form solidified soil; 7) carrying out paving treatment on the solidified soil to make the solidified soil be flatly laid on the bottom base layer to form a solidified soil layer; and 8) carrying out rolling treatment on the solidified soil layer to make the solidified soil layer be compacted and flat and cover the bottom base layer. Through the step-by-step construction process, the integrity and uniformity of the solidified soil layer are improved, so that the road mixing type rolling solidified soil has good construction quality.

Description

Technical Field

[0001] This invention relates to the technical field of soil hardening mixing, and more specifically, to a road-mixing roller-compacted soil hardening construction method. Background Technology

[0002] Solidified soil is a material that improves the engineering properties of soil by adding special solidifying agents to natural or locally obtained soil, and then mechanically mixing, spreading and compacting it. It can improve the strength, bearing capacity, water stability and durability of soil, and has been widely used in road subgrade, site base course, dam filling and other fields.

[0003] Depending on the mixing process, solidified soil construction is mainly divided into "plant mixing" and "road mixing". Among them, road mixing is widely used because it does not require the construction of a fixed mixing plant, has a simple process, and is suitable for large-scale operations.

[0004] However, existing road mixing construction methods have some shortcomings, making it difficult to meet the requirements of high-standard projects in terms of construction quality. For example, the road mixing method often results in uneven distribution of soil, binder and curing agent due to local differences in the moisture and particle size of the soil itself, and the spread process is affected by factors such as mechanical precision and wind speed. This leads to insufficient local curing reaction and large strength dispersion.

[0005] Furthermore, existing technologies have a crude control over the mixing, spraying, and blending processes of water and curing liquid, making it difficult to ensure the uniform distribution and mixing of water and curing agent. This affects the optimal moisture content of the mixture during subsequent compaction, making it difficult to form a uniform and dense microstructure through compaction, thereby weakening the integrity, impermeability, and long-term durability of the solidified soil layer. Summary of the Invention

[0006] The purpose of this invention is to provide a road-mixing roller-compacted soil solidification construction method, which aims to solve the problem of poor solidification soil construction quality in the prior art.

[0007] This invention is implemented as follows: a road-mixing roller-compacted soil stabilization construction method, characterized by the following construction steps: 1) Determine the construction area of ​​the road and compact the subgrade soil in the construction area to form the base course; 2) Spread soil material on the subbase; 3) Spread the binder on the soil material; 4) Mix the soil and binder to form a preliminary mixture; 5) Mix the curing agent with water to form a curing liquid, and spray the curing liquid onto the initial mixture; 6) Mix the initial mixture with the curing liquid to form solidified soil; 7) Spread the solidified soil evenly on the subbase to form a solidified soil layer; 8) The solidified soil layer is compacted to cover the subbase in a compacted and flat state.

[0008] Furthermore, in construction step 1), the construction area of ​​the road is determined by surveying and setting out.

[0009] Furthermore, in construction step 3), the binder is in powder form, and a powder spreader is used to spread the binder on the soil so that the binder is evenly distributed on the soil.

[0010] Furthermore, in construction step 3), the powder spreader includes a mobile body, a horizontally arranged cylinder on the body, a horizontally arranged cylindrical cavity in the cylinder, a plate-shaped spreading plate at the bottom of the cylinder, and multiple lower through holes in the spreading plate; a horizontally movable moving plate is provided on the spreading plate, and multiple upper through holes in the moving plate. The binder is placed in the cylinder cavity, and the machine body moves along the construction area so that the cylinder body moves above the soil. The moving plate moves laterally back and forth relative to the spreading plate so that the upper through hole and the lower through hole are aligned and connected or staggered and separated. When the upper through hole and the lower through hole are aligned and connected, the binder material in the cylinder cavity passes through the upper through hole and the lower through hole in sequence and is spread on the soil material; when the upper through hole and the lower through hole are misaligned and separated, the binder material stagnates in the cylinder cavity.

[0011] Furthermore, in construction step 3), the multiple upper-layer through holes are arranged in an array on the movable plate, and the top of the movable plate has multiple interval areas, which are located between multiple adjacent upper-layer through holes. The interval area is provided with an elastic column made of elastic material. The diameter of the elastic column gradually decreases from bottom to top, and the elastic column is conical. During the reciprocating movement of the moving plate relative to the spreading plate, the elastic column reciprocates elastically to drive the adhesive on the moving plate through the upper through hole.

[0012] Furthermore, in construction step 3), a longitudinal shaft protrudes from the interval area, the longitudinal shaft is movably inserted into the lower part of the elastic column, and the longitudinal shaft is eccentrically arranged with respect to the elastic column; the upper part of the elastic column extends above the longitudinal shaft, forming a free segment that is freely and elastically arranged. During the reciprocating movement of the moving plate relative to the spreading plate, the elastic column is squeezed by the binder and rotates eccentrically relative to the longitudinal axis. The free section is squeezed by the binder and swings back and forth relative to the longitudinal axis to drive the binder on the moving plate through the upper through hole.

[0013] Furthermore, in construction step 3), the moving plate and the spreading plate are both rectangular in shape, and there is a rectangular spreading interval between the moving plate and the spreading plate; multiple elastic blocks are provided on both sides of the spreading interval, the bottom of the elastic blocks is connected to the side of the spreading plate, and the top of the elastic blocks is connected to the side of the moving plate. The end of the movable plate is connected to a vibration motor, which drives the movable plate to reciprocate tilting relative to the spreading plate, and the elastic block reciprocates elastically.

[0014] Furthermore, in construction step 3), a rotating shaft is provided in the cylinder cavity, and the rotating shaft is provided with multiple rotating blades, which are arranged at intervals along the circumference of the rotating shaft. The lower part of the cylinder cavity is recessed to form a recessed groove, the spreading plate is formed at the bottom of the recessed groove, the moving plate is formed in the middle of the recessed groove, and an iron mesh layer is formed at the top of the recessed groove. During the process of spreading the binder on the soil, the rotating shaft drives multiple rotating blades to rotate. The multiple rotating blades rotate and stir the binder in the cylinder cavity. The rotating binder passes through the iron mesh layer, the upper through hole and the lower through hole in sequence and is spread on the soil.

[0015] Furthermore, in construction step 8), a roller is used to compact the solidified soil layer so that the solidified soil layer is compacted and flat and covers the base layer; the roller includes an inner shaft body, and an outer circumference cylinder is sleeved on the outer circumference of the inner shaft body, and there is an annular gap between the outer circumference cylinder and the inner shaft body. The annular interval is provided with a plurality of vibration springs, which are arranged at intervals along the circumference of the annular interval. The outer end of the vibration spring is connected to the outer circumferential cylinder, and the inner end of the vibration spring is connected to the inner shaft, so that the outer circumferential cylinder and the inner shaft are elastically connected. The inner shaft is provided with a vibrator. The outer circumferential cylinder presses against the solidified soil layer and elastically rolls along the solidified soil layer. The vibrator vibrates in the inner shaft and transmits the vibration to the outer circumferential cylinder through multiple vibration springs, so that the outer circumferential cylinder vibrates and rolls on the solidified soil layer.

[0016] Furthermore, in construction step 8), the outer circumferential cylinder is provided with multiple elastic holes with outer circumferential openings, and the multiple elastic holes are arranged sequentially and at intervals along the circumference of the outer circumferential cylinder; a return spring is provided at the bottom of the elastic hole, and a pressing head is movably inserted into the elastic hole. The inner end of the pressing head is connected to the return spring, and the outer end of the pressing head is exposed on the outer circumference of the outer circumferential cylinder, forming an arc-shaped head. During the vibration rolling process of the outer peripheral cylinder on the solidified soil layer, when the arc-shaped head presses against the solidified soil layer, the return spring is compressed. The arc-shaped heads of the multiple pressing heads form multi-point vibration and pressure on the solidified soil layer. When the arc-shaped head of the pressing head detaches from the solidified soil layer, the return spring drives the pressing head to elastically return to its original position outward.

[0017] Compared with the prior art, the road-mixing roller-compacted soil construction method provided by the present invention first stabilizes the underlying foundation for the subsequent solidified soil layer by compacting the subgrade soil in the construction area, thus avoiding quality defects caused by uneven settlement of the base layer.

[0018] Next, by spreading soil and cementitious material sequentially on the subbase, the material is distributed as evenly as possible during the spreading and spreading process. This solves the problem of uneven material distribution leading to insufficient local curing reaction.

[0019] After the soil and binder are mixed to form the initial mixture, by clarifying the preparation process of the curing liquid and accurately spraying it onto the initial mixture, it is possible to ensure that the chemical reaction conditions between the curing agent and the water are fully guaranteed, so that the solidified soil formed after the curing liquid is mixed with the initial mixture has a uniform strength curing effect.

[0020] Finally, the paving process allows the solidified soil to be laid flat on the subbase, forming a uniform solidified soil layer. Subsequent compaction further ensures that the solidified soil layer is dense and flat, reducing the local porosity of the solidified soil layer and enhancing its bearing capacity.

[0021] This step-by-step optimized construction process not only improves the integrity and uniformity of the solidified soil layer, but also enhances its durability and long-term stability, thus enabling road-mixed roller-compacted solidified soil to have better construction quality. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the construction method for road-mixed roller-compacted solidified soil provided by the present invention; Figure 2 This is an internal schematic diagram of the powder spreader provided by the present invention; Figure 3 This is a partial cross-sectional schematic diagram of the stepping plate and the movable version provided by the present invention; Figure 4 This is a schematic diagram of the internal structure of the roller shaft provided by the present invention; In the figure: body 100, cylinder 101, cylinder cavity 102, rotating shaft 103, rotating blade 104, recessed groove 105, iron mesh layer 106; Spreading plate 200, lower layer through hole 201, spreading interval 202, elastic block 203; Moving plate 300, upper through hole 301, interval area 302, elastic column 303, free section 304, longitudinal shaft 305, vibration motor 306; Roller shaft 400, inner shaft body 401, outer peripheral cylinder 402, annular gap 403, vibration spring 404, vibrator 405, elastic hole 406, return spring 407, pressing head 408, arc-shaped head 409. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0025] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0026] Reference Figure 1-4 The image shows a preferred embodiment of the present invention.

[0027] The construction method for road-mixed roller-compacted soil includes the following steps: 1) Determine the construction area of ​​the road and compact the subgrade soil in the construction area to form the base course; 2) Spread soil material on the subbase; 3) Spread the binder on the soil; 4) Mix the soil and binder to form the initial mixture; 5) Mix the curing agent with water to form a curing liquid, and spray the curing liquid onto the initial mixture; 6) Mix the initial mixture with the curing liquid to form solidified soil; 7) Spread the solidified soil evenly on the subbase to form a solidified soil layer; 8) Compact the solidified soil layer to make it compacted and flat, covering the subbase.

[0028] The above-mentioned road-mixing roller-compacted soil solidification construction method first stabilizes the underlying foundation for subsequent solidification of the soil layer by compacting the subgrade soil in the construction area, thus avoiding quality defects caused by uneven settlement of the base layer.

[0029] Next, by spreading soil and cementitious material sequentially on the subbase, the material is distributed as evenly as possible during the spreading and spreading process. This solves the problem of uneven material distribution leading to insufficient local curing reaction.

[0030] After the soil and binder are mixed to form the initial mixture, by clarifying the preparation process of the curing liquid and accurately spraying it onto the initial mixture, it is possible to ensure that the chemical reaction conditions between the curing agent and the water are fully guaranteed, so that the solidified soil formed after the curing liquid is mixed with the initial mixture has a uniform strength curing effect.

[0031] Finally, the paving process allows the solidified soil to be laid flat on the subbase, forming a uniform solidified soil layer. Subsequent compaction further ensures that the solidified soil layer is dense and flat, reducing the local porosity of the solidified soil layer and enhancing its bearing capacity.

[0032] This step-by-step optimized construction process not only improves the integrity and uniformity of the solidified soil layer, but also enhances its durability and long-term stability, thus enabling road-mixed roller-compacted solidified soil to have better construction quality.

[0033] In this embodiment, in construction step 1), the construction area of ​​the road is determined by surveying and setting out; in this way, the construction scope can be accurately located, ensuring the accuracy and standardization of construction.

[0034] Specifically, surveying and setting out utilizes professional surveying instruments, such as total stations and levels, to accurately measure the starting point, ending point, and key control points of the road, marking the construction boundaries and the specific locations of each structural layer.

[0035] Moreover, by combining topography and design drawings, surveying and setting out can identify obstacles or special terrain in the construction area in advance, allowing for early planning of construction schemes and optimization of the construction process.

[0036] This provides a scientific basis for subsequent construction steps such as soil compaction and material paving, reduces resource waste and potential quality risks, and ensures the orderly and efficient operation of the entire road construction process.

[0037] In this embodiment, in construction step 3), the binder is in powder form. The binder is spread on the soil using a powder spreader so that the binder is evenly distributed on the soil.

[0038] The use of a powder spreader enables the rapid and uniform spreading of binder, improving the uniformity and efficiency of binder spreading, enhancing the soil solidification effect, reducing the unevenness and labor costs of manual spreading, and providing a good foundation for subsequent mixing and compaction processes.

[0039] In this embodiment, in construction step 3), the powder spreader includes a mobile body 100, a horizontally arranged cylinder 101 on the body 100, a horizontally arranged cylinder cavity 102 in the cylinder 101, a plate-shaped spreading plate 200 at the bottom of the cylinder 101, and multiple lower through holes 201 in the spreading plate 200; a horizontally movable moving plate 300 is provided on the spreading plate 200, and multiple upper through holes 301 in the moving plate 300. The binder is placed in the cylinder 102, and the machine body 100 moves along the construction area so that the cylinder 101 moves above the soil. The moving plate 300 moves laterally back and forth relative to the spreading plate 200 so that the upper through hole 301 and the lower through hole 201 are aligned and connected or staggered and separated. When the upper through hole 301 and the lower through hole 201 are aligned and connected, the binder material in the cylinder 102 passes through the upper through hole 301 and the lower through hole 201 in sequence and is spread on the soil. When the upper through hole 301 and the lower through hole 201 are misaligned and separated, the binder material remains in the cylinder 102. In this way, not only is the uniformity of spreading improved, but the spreading amount can also be flexibly adjusted according to the needs of different construction sections, avoiding waste of binder material.

[0040] Furthermore, the mobility of the machine body 100 allows it to flexibly adapt to different construction sites, while the cylinder 101 and the cylinder cavity 102 provide ample storage space for the binder.

[0041] For example, in mountainous road construction or complex terrain operations, this powder spreader can accurately spread the binder in the designated area according to the actual terrain and construction requirements, reducing the phenomenon of uneven spreading and low control precision of powder spreaders in complex terrain.

[0042] In this embodiment, in construction step 3), multiple upper through holes 301 are arranged in an array on the moving plate 300, and the top of the moving plate 300 has multiple interval areas 302, which are located between multiple adjacent upper through holes 301. An elastic column 303 made of elastic material is protruding on the interval 302. The diameter of the elastic column 303 gradually decreases from bottom to top, and the elastic column 303 is conical. During the reciprocating movement of the moving plate 300 relative to the spreading plate 200, the elastic column 303 reciprocates elastically to drive the adhesive on the moving plate 300 through the upper through hole 301.

[0043] The array of multiple upper through holes 301 ensures the coverage and uniformity of the binder. The elastic columns 303 on the interval 302 are conical in shape, with their diameter gradually decreasing from bottom to top to facilitate the flow of the binder downwards. The reciprocating elastic oscillation of the elastic columns 303, in conjunction with the reciprocating elastic oscillation of the elastic columns 303, improves the efficiency of the binder passing through the upper through holes 301.

[0044] In addition, for example, when the binder has high moisture content or fine particles that are prone to clumping, the vibration of the elastic column 303 can also prevent the binder from clogging the through holes, ensuring the continuity and stability of the spreading process.

[0045] In this embodiment, in construction step 3), a longitudinal shaft 305 protrudes from the interval area 302. The longitudinal shaft 305 is movably inserted into the lower part of the elastic column 303, and the longitudinal shaft 305 and the elastic column 303 are eccentrically arranged. The upper part of the elastic column 303 extends above the longitudinal shaft 305, forming a free segment 304 that is freely and elastically arranged. During the reciprocating movement of the moving plate 300 relative to the spreading plate 200, the elastic column 303 is squeezed by the binder and rotates eccentrically relative to the longitudinal axis 305. The free section 304 is squeezed by the binder and swings back and forth relative to the longitudinal axis 305 to drive the binder on the moving plate 300 through the upper through hole 301.

[0046] The combined motion of the longitudinal axis 305 and the elastic column 303 through eccentric rotation and oscillation not only increases the vibration frequency and force of the elastic column 303 on the moving plate 300, but also enables the binder on the moving plate 300 to be uniformly vibrated and pushed in multiple directions.

[0047] This vibration and propulsion is particularly suitable for spreading cementitious materials with poor flowability or that are prone to clumping. It can effectively prevent the cementitious material from accumulating on the moving plate 300 or clogging the through holes, ensuring that the cementitious material is spread evenly and smoothly on the soil through the upper through holes 301, thereby improving the spreading quality and efficiency.

[0048] In this embodiment, in construction step 3), the moving plate 300 and the spreading plate 200 are both rectangular in shape, and there is a rectangular spreading interval 202 between the moving plate 300 and the spreading plate 200; multiple elastic blocks 203 are provided on both sides of the spreading interval 202, the bottom of the elastic block 203 is connected to the side of the spreading plate 200, and the top of the elastic block 203 is connected to the side of the moving plate 300. The end of the movable plate 300 is connected to a vibration motor 306. The vibration motor 306 drives the movable plate 300 to reciprocate tilting relative to the spreading plate 200, and the elastic block 203 reciprocates elastically.

[0049] The rectangular movable plate 300 and the spreading plate 200 ensure the coverage and structural stability of the spreading, while the elastic blocks 203 on both sides of the spreading interval 202 play a key role in buffering and oscillation. At the same time, the vibration motor 306 drives the moving plate 300 to tilt back and forth, and the elastic block 203 swings back and forth elastically. This compound motion not only enhances the vibration effect of the moving plate 300, but also allows the moving plate 300 to continuously adjust its angle during tilting, so as to promote the uniform passage of the binder through the upper through hole 301, thereby improving the spreading efficiency and quality.

[0050] In this embodiment, in construction step 3), a rotating shaft 103 is provided in the cylinder cavity 102, and the rotating shaft 103 is provided with multiple rotating blades 104, which are arranged at intervals along the circumference of the rotating shaft 103. The lower part of the cylinder cavity 102 is recessed to form a recessed groove 105. The spreading plate 200 is formed at the bottom of the recessed groove 105, the moving plate 300 is formed in the middle of the recessed groove 105, and the top of the recessed groove 105 is formed with an iron mesh layer 106. During the process of spreading the binder on the soil by the powder spreader, the rotating shaft 103 drives multiple rotating blades 104 to rotate. The multiple rotating blades 104 rotate and stir the binder in the cylinder 102. The rotating binder passes through the iron mesh layer 106, the upper through hole 301 and the lower through hole 201 in sequence and is spread on the soil.

[0051] The rotating shaft 103 and rotating blades 104 provided in the cylinder 102 provide a stirring function for the spreading of the binder, which can not only prevent the binder from clumping or separating in the cylinder 102, but also make the binder reach a uniformly mixed state before spreading.

[0052] In addition, the iron mesh layer 106 can perform secondary filtration of the binder, preventing large particles or lumps of binder from passing directly through the through holes, ensuring that the spread binder has a uniform particle size, and improving the uniformity and stability of the subsequent curing reaction.

[0053] In this embodiment, in construction step 8), the roller 400 is used to compact the solidified soil layer so that the solidified soil layer is compacted and flat and covers the base layer. The roller 400 includes an inner shaft 401, and an outer circumferential cylinder 402 is sleeved on the outer circumference of the inner shaft 401. The outer circumferential cylinder 402 is sleeved on the outer circumference of the inner shaft 401, and there is an annular gap 403 between the outer circumferential cylinder 402 and the inner shaft 401. Multiple vibration springs 404 are provided in the annular interval 403. The multiple vibration springs 404 are arranged at intervals along the circumference of the annular interval 403. The outer end of the vibration spring 404 is connected to the outer peripheral cylinder 402, and the inner end of the vibration spring 404 is connected to the inner shaft 401, so that the outer peripheral cylinder 402 and the inner shaft 401 are elastically connected. The inner shaft 401 is provided with a vibrator 405. The outer circumferential cylinder 402 presses against the solidified soil layer and rolls elastically along the solidified soil layer. The vibrator 405 vibrates in the inner shaft 401 and transmits the vibration to the outer circumferential cylinder 402 through multiple vibration springs 404, so that the outer circumferential cylinder 402 vibrates and rolls on the solidified soil layer.

[0054] The compaction effect and density of the solidified soil layer are improved by the elastic connection of the roller 400 and the vibratory rolling method. In particular, the vibratory rolling method can make the particles in the solidified soil layer more closely arranged, reduce porosity, and improve the density and bearing capacity of the soil layer.

[0055] Compared with traditional static compaction, vibratory rolling can penetrate deeper into the solidified soil layer, especially when the compaction thickness is large or the soil is hard. Its advantages are more obvious, solving the problems of uneven compaction and easy to leave compaction dead corners, thereby improving the construction quality of solidified soil layer.

[0056] In this embodiment, in construction step 8), the outer peripheral cylinder 402 is provided with multiple elastic holes 406 with outer peripheral openings, and the multiple elastic holes 406 are arranged sequentially and at intervals along the circumference of the outer peripheral cylinder 402; a return spring 407 is provided at the bottom of the elastic hole 406, and a pressing head 408 is movably inserted into the elastic hole 406. The inner end of the pressing head 408 is connected to the return spring 407, and the outer end of the pressing head 408 is exposed on the outer periphery of the outer peripheral cylinder 402, forming an arc-shaped head 409; During the vibratory rolling process of the outer circumferential cylinder 402 on the solidified soil layer, when the arc-shaped head 409 presses against the solidified soil layer, the return spring 407 is compressed. The arc-shaped heads 409 of the multiple pressing heads 408 form multi-point vibration pressing against the solidified soil layer. When the arc-shaped head 409 of the pressing head 408 detaches from the solidified soil layer, the return spring 407 drives the pressing head 408 to move outward elastically back to its original position. In this way, the arc-shaped head 409 enables the pressing head 408 to evenly distribute pressure when pressing against the solidified soil layer, reducing damage to the soil surface.

[0057] Moreover, the combination of multi-point elastic compression and vibration can penetrate deep into the solidified soil layer for high-frequency compaction. Especially when dealing with uneven or unevenly hard soil layers, it can better adapt to complex soil conditions, thereby improving the overall strength and stability of the solidified soil layer.

[0058] In this embodiment, the construction steps of the road-mixed roller-compacted soil construction method follow the relevant provisions of the "Technical Specification for Application of Road Solidified Soil" (T / CES737-2020), and especially demonstrate high technical detail and practicality in the construction process.

[0059] For example, in the construction of the road base, the subgrade soil is first fully compacted to ensure that its flatness and density meet the design requirements; then, the soil layer is evenly spread using a powder spreader, and the amount of cementitious material spread is controlled, and the mixture is initially mixed twice to ensure that the materials are evenly mixed.

[0060] Next, the mixing water and the curing additive were mixed and sprayed evenly onto the soil, and then deep-mixed at least three times to ensure that the curing reaction was fully carried out.

[0061] During the compaction process, a 400 roller was used to uniformly compact the solidified soil layer 2 to 3 times, ensuring that the thickness of each layer was controlled at around 20cm. This not only met the thickness range of 15 to 25cm, but also improved the density and bearing capacity of the soil layer through a combination of elastic compression and vibration at multiple points.

[0062] In addition, the construction process is controlled to be completed within 3 to 4 hours to ensure that the expected effect is achieved within the initial setting time of the cementitious material; during the curing stage, a combination layer of "non-woven fabric + plastic sheet" is used for covering, and water is sprayed regularly to keep it moist, preventing cracking caused by moisture evaporation.

[0063] Through meticulous operation and improved technology, the construction quality of the solidified soil base layer was enhanced throughout the construction process, thereby achieving a significant improvement in the overall construction quality of the solidified soil.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for constructing road-mixed roller-compacted soil, characterized in that, The construction steps include the following: 1) Determine the construction area of ​​the road and compact the subgrade soil in the construction area to form the base course; 2) Spread soil material on the subbase; 3) Spread the binder on the soil material; 4) Mix the soil and binder to form a preliminary mixture; 5) Mix the curing agent with water to form a curing liquid, and spray the curing liquid onto the initial mixture; 6) Mix the initial mixture with the curing liquid to form solidified soil; 7) Spread the solidified soil evenly on the subbase to form a solidified soil layer; 8) The solidified soil layer is compacted to cover the subbase in a compacted and flat state.

2. The road-mixing roller-compacted soil construction method as described in claim 1, characterized in that, In construction step 1), the construction area of ​​the road is determined by surveying and setting out.

3. The road-mixing roller-compacted soil construction method as described in claim 1 or 2, characterized in that, In construction step 3), the binder is in powder form and is spread on the soil using a powder spreader so that the binder is evenly distributed on the soil.

4. The road-mixing roller-compacted soil construction method as described in claim 3, characterized in that, In construction step 3), the powder spreader includes a mobile body, a horizontally arranged cylinder on the body, a horizontally arranged cylinder cavity in the cylinder, a plate-shaped spreading plate at the bottom of the cylinder, and multiple lower through holes in the spreading plate; a horizontally movable plate is provided on the spreading plate, and multiple upper through holes in the movable plate. The binder is placed in the cylinder cavity, and the machine body moves along the construction area so that the cylinder body moves above the soil. The moving plate moves laterally back and forth relative to the spreading plate so that the upper through hole and the lower through hole are aligned and connected or staggered and separated. When the upper through hole and the lower through hole are aligned and connected, the binder material in the cylinder cavity passes through the upper through hole and the lower through hole in sequence and is spread on the soil material; when the upper through hole and the lower through hole are misaligned and separated, the binder material stagnates in the cylinder cavity.

5. The road-mixing roller-compacted soil construction method as described in claim 4, characterized in that, In construction step 3), multiple upper-layer through holes are arranged in an array on the movable plate, and the top of the movable plate has multiple interval areas, which are located between multiple adjacent upper-layer through holes. The interval area is provided with an elastic column made of elastic material. The diameter of the elastic column gradually decreases from bottom to top, and the elastic column is conical. During the reciprocating movement of the moving plate relative to the spreading plate, the elastic column reciprocates elastically to drive the adhesive on the moving plate through the upper through hole.

6. The road-mixing roller-compacted soil construction method as described in claim 5, characterized in that, In construction step 3), a longitudinal shaft protrudes from the interval area, the longitudinal shaft is movably inserted into the lower part of the elastic column, and the longitudinal shaft is eccentrically arranged with respect to the elastic column; the upper part of the elastic column extends above the longitudinal shaft, forming a free segment that is freely and elastically arranged. During the reciprocating movement of the moving plate relative to the spreading plate, the elastic column is squeezed by the binder and rotates eccentrically relative to the longitudinal axis. The free section is squeezed by the binder and swings back and forth relative to the longitudinal axis to drive the binder on the moving plate through the upper through hole.

7. The road-mixing roller-compacted soil construction method as described in claim 4, characterized in that, In construction step 3), the moving plate and the spreading plate are both rectangular in shape, and there is a rectangular spreading interval between the moving plate and the spreading plate; multiple elastic blocks are provided on both sides of the spreading interval, the bottom of the elastic blocks is connected to the side of the spreading plate, and the top of the elastic blocks is connected to the side of the moving plate. The end of the movable plate is connected to a vibration motor, which drives the movable plate to reciprocate tilting relative to the spreading plate, and the elastic block reciprocates elastically.

8. The road-mixing roller-compacted soil construction method as described in claim 4, characterized in that, In construction step 3), a rotating shaft is provided in the cylinder cavity, and the rotating shaft is provided with multiple rotating blades, which are arranged at intervals along the circumference of the rotating shaft. The lower part of the cylinder cavity is recessed to form a recessed groove, the spreading plate is formed at the bottom of the recessed groove, the moving plate is formed in the middle of the recessed groove, and an iron mesh layer is formed at the top of the recessed groove. During the process of spreading the binder on the soil, the rotating shaft drives multiple rotating blades to rotate. The multiple rotating blades rotate and stir the binder in the cylinder cavity. The rotating binder passes through the iron mesh layer, the upper through hole and the lower through hole in sequence and is spread on the soil.

9. The road-mixing roller-compacted soil construction method as described in claim 1 or 2, characterized in that, In construction step 8), a roller is used to compact the solidified soil layer so that the solidified soil layer is compacted and flat and covers the base layer. The roller includes an inner shaft, and an outer circumference sleeve is fitted around the outer circumference of the inner shaft. The outer circumference sleeve is fitted around the outer circumference of the inner shaft, and there is an annular gap between the outer circumference sleeve and the inner shaft. The annular interval is provided with a plurality of vibration springs, which are arranged at intervals along the circumference of the annular interval. The outer end of the vibration spring is connected to the outer circumferential cylinder, and the inner end of the vibration spring is connected to the inner shaft, so that the outer circumferential cylinder and the inner shaft are elastically connected. The inner shaft is provided with a vibrator. The outer circumferential cylinder presses against the solidified soil layer and elastically rolls along the solidified soil layer. The vibrator vibrates in the inner shaft and transmits the vibration to the outer circumferential cylinder through multiple vibration springs, so that the outer circumferential cylinder vibrates and rolls on the solidified soil layer.

10. The road-mixing roller-compacted soil construction method as described in claim 9, characterized in that, In construction step 8), the outer circumferential cylinder is provided with multiple elastic holes with outer circumferential openings, and the multiple elastic holes are arranged sequentially and at intervals along the circumference of the outer circumferential cylinder; a return spring is provided at the bottom of the elastic hole, and a pressing head is movably inserted into the elastic hole. The inner end of the pressing head is connected to the return spring, and the outer end of the pressing head is exposed on the outer circumference of the outer circumferential cylinder, forming an arc-shaped head. During the vibration rolling process of the outer peripheral cylinder on the solidified soil layer, when the arc-shaped head presses against the solidified soil layer, the return spring is compressed, and the arc-shaped heads of the multiple pressing heads form multi-point vibration pressing against the solidified soil layer. When the arc-shaped head of the pressing head detaches from the solidified soil layer, the return spring drives the pressing head to move outward elastically to return to its original position.

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