Construction technology of bubble mixed light soil

Abstract

The application discloses a bubble mixed light soil construction process and relates to the technical field of building road construction, and specifically comprises the following steps: first, excavating a roadbed, cutting the surface layer of the roadbed in a net shape to form longitudinal and transverse intersecting cutting marks on the surface layer, and then tamping the roadbed; second, laying a layer of gravel on the tamped roadbed as a cushion layer; third, preparing bubble mixed light soil after the gravel cushion layer is laid; and fourth, laying the bubble mixed light soil on the cushion layer. Since the bottom ends of the gravity guide pipes are initially blocked by the rotating blocking components, the bubble mixed light soil filled with the bubble mixed light soil can gradually descend to the road cushion layer by gravity, and then the rotating blocking components are opened, so that the bubble mixed light soil can directly flow to the road cushion layer without a height difference, and the bubble compression and elimination caused by impact are avoided, and the bulk density is affected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building road construction, in particular to a bubble mixed light soil construction process. BACKGROUND

[0002] The bubble mixed light soil is a new type of environmentally friendly material, which provides an excellent technical means for solving the problems of car jumping in high-grade highway soft foundation embankment, soft soil foundation treatment, differential settlement of new and old roadbeds during highway roadbed widening, stability of high fill embankment, and saving of land resources, and has good popularization value. The bubbles in the bubble mixed light soil have both independent fine characteristics and dispersibility. When filling the foam mixed light soil, the bubbles will be compressed and defoamed due to their own weight, which needs to be controlled.

[0003] A bubble mixed light soil construction process is disclosed in Chinese Patent No. CN110485229B, which comprises the following steps: a. excavating the base and tamping the base; b. laying gravel on the base to form a cushion layer; c. arranging a plurality of positioning members, the positioning members comprising positioning nails and a body, the body comprising a positioning block and reinforcing bars, a plurality of reinforcing bars being arranged in a petal shape and connected to the positioning block, the positioning nails being inserted into the base after sequentially penetrating the positioning block and the cushion layer from top to bottom; d. pouring the foam light soil onto the cushion layer through the disperser to form a surface layer. The scheme forms a barrier to the foam light soil by arranging the positioning members, slows down the flow of the foam light soil, thereby reducing the probability of bubble compression and defoaming, and effectively controlling the bulk density.

[0004] The above-mentioned prior art scheme has the following disadvantages: although the above-mentioned scheme can slow down the flow of the bubble light soil by arranging the positioning members and reduce the probability of bubble compression and defoaming, when the bubble light soil is laid through the disperser, the disperser has a certain height, and the disperser directly discharges material through the discharge hole fixedly arranged at the bottom. The discharge hole has a certain height difference from the road surface, and the distance between the discharge hole and the road surface cannot be adjusted. Therefore, the bubble light soil discharged in this way will hit the road surface when falling, and the bubbles will also be compressed by each other, resulting in bubble elimination, affecting the bulk density, and leading to poor construction effect. SUMMARY

[0005] The present application aims to provide a bubble mixed light soil construction process to solve the technical problem of bubble elimination in the construction process of the bubble mixed light soil in the prior art, affecting the bulk density, and leading to poor construction effect.

[0006] The technical problem solved by the present application can be achieved by the following technical scheme:

[0007] A bubble mixed light soil construction process, the specific steps are as follows:

[0008] The first step is to excavate the road base and make a mesh-like cut on the surface of the road base to create crisscrossing cut grooves. Then, the road base is compacted.

[0009] The second step is to lay a layer of crushed stone as a subbase after the road surface base is compacted.

[0010] The third step is to prepare air-bubble mixed lightweight soil after the crushed stone cushion layer is laid.

[0011] Step 4: Lay the mixed bubble-bubble lightweight soil onto the subbase using a dispersing device. The dispersing device includes a main pipe and a support, with the support connected to the bottom of the main pipe. The bottom of the main pipe has multiple dispersing holes spaced horizontally at equal intervals. Each dispersing hole is equipped with a gravity conduit below it to guide the discharge of the bubble-bubble lightweight soil. The upper end of the gravity conduit is connected to the dispersing hole by a corrugated telescopic pipe to facilitate the raising and lowering of the gravity conduit.

[0012] As a further aspect of the present invention: a return spring is connected to one side of the top of each gravity conduit and the main pipe; multiple guide sleeves are distributed horizontally at equal intervals below the main pipe, and each gravity conduit slides through the corresponding guide sleeve; a rotating sealing assembly is provided at the bottom of each gravity conduit, which seals the bottom of the gravity conduit, allowing the air-bubbly mixed lightweight soil in the main pipe to flow into the gravity conduit for temporary storage. Then, the gravity conduit slides downward under the gravity of the air-bubbly mixed lightweight soil, and the rotating sealing assembly is rotated to open. During the discharge of the air-bubbly mixed lightweight soil, the gravity conduit gradually rises due to the rebound force of the return spring, causing the air-bubbly mixed lightweight soil to accumulate layer by layer upward.

[0013] As a further aspect of the present invention: the rotary sealing assembly includes a sealing rotating plate and a connecting bushing. The connecting bushing is fixedly connected to one side of the bottom of the gravity conduit. A rotating arm is rotatably connected to the lower side of the connecting bushing via a rotating shaft. The sealing rotating plate is positioned at the bottom of the gravity conduit and is connected to the rotating arm. The rotating arm is used to drive the sealing rotating plate to rotate, thereby controlling the opening and closing of the bottom of the gravity conduit. A linkage component is provided between each rotary sealing assembly at the bottom of the gravity conduit.

[0014] As a further aspect of the present invention: the linkage component includes a timing belt, and each of the connecting bushings is provided with a timing wheel coaxially connected to the corresponding rotating arm. The timing belt is connected to each timing wheel, and the timing belt enables all the timing wheels to rotate synchronously, thereby driving all the rotating arms to rotate synchronously, so that the sealing plate rotates synchronously.

[0015] As a further aspect of the present invention: each of the guide sleeves is provided with a frictional resistance mechanism for controlling the slow ascent of the gravity conduit. The frictional resistance structure includes a friction pad, a push rod, and a first connecting sleeve. The first connecting sleeve is connected to the upper side of the guide sleeve. The push rod is laterally inserted into the first connecting sleeve. The friction pad is connected to the end of the push rod near the gravity conduit. A connecting spring is connected between the end of the push rod away from the gravity conduit and the first connecting sleeve. The connecting spring causes the push rod, along with the friction pad, to abut against the outer wall of the gravity conduit. When the gravity conduit rises under the action of the return spring, the friction pad generates frictional resistance, reducing the rising speed of the gravity conduit.

[0016] As a further aspect of the present invention: a second connecting sleeve is connected to the end of the top rod away from the friction top pad, and a linkage guide bar is vertically slidably inserted inside the second connecting sleeve. Two clamping plates are connected to the bottom end of the linkage guide bar, and a limiting top plate that cooperates with the two clamping plates is coaxially connected to the synchronous wheel; when the sealing plate closes the bottom of the gravity conduit, the limiting top plate is between the two clamping plates and abuts against the linkage guide bar. At this time, the friction top pad and the gravity conduit are in a separated state, and the connecting spring is in a stretched state.

[0017] As a further aspect of the present invention: in the second step of laying the crushed stone subbase, the crushed stone is laid laterally from one side of the roadbed to the other side, and the crushed stone is rolled by rollers during the laying process.

[0018] As a further aspect of the present invention, the specific process for preparing bubble-mixed lightweight soil is as follows: first, a foaming agent and water are mixed to obtain a foaming liquid, and then compressed air is added to the foaming liquid to generate a bubble liquid; then, a curing material and water are stirred and mixed to obtain a cement slurry, and the cement slurry is mixed with the bubble liquid to obtain bubble-mixed lightweight soil.

[0019] As a further aspect of the present invention, the specific mixing method of the cement slurry and the bubble liquid is as follows: the cement slurry and the bubble liquid are respectively introduced into the same container through conduits, and the two conduits move in a circular motion around the inside of the container.

[0020] The beneficial effects of this invention are:

[0021] 1. This invention uses a distributed dispensing device to dispense and lay bubble-mixed lightweight soil. Before dispensing, the bubble-mixed lightweight soil enters each of the distributed gravity conduits through the main pipe. Since the bottom of each gravity conduit is initially sealed by a rotating sealing component, it can gradually descend towards the road subbase by gravity while being filled with bubble-mixed lightweight soil. Then, the rotating sealing component is opened, and the bubble-mixed lightweight soil can flow directly to the road subbase without any drop height, avoiding the impact that causes the bubbles to be compressed and eliminated, thus affecting the bulk density.

[0022] 2. During the discharge process, the gravity conduit of the air-bubble mixed lightweight soil of the present invention experiences less gravity, so it can rise by relying on the return spring, which facilitates the layer-by-layer accumulation and laying of the air-bubble mixed lightweight soil. At the same time, the speed can be reduced by the frictional resistance generated by the friction pad during the rising process, so as to avoid rising too fast and affecting the laying effect of the air-bubble mixed lightweight soil. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a flowchart of the construction process for bubble-mixed lightweight soil according to the present invention;

[0025] Figure 2 This is a schematic diagram of the overall structure of the distributed delivery device in this invention;

[0026] Figure 3 yes Figure 2 Enlarged structural diagram at point A;

[0027] Figure 4 This is a top view schematic diagram of the relative positional distribution of the synchronous pulley, synchronous belt, and gravity guide tube in this invention.

[0028] In the diagram: 1. Main pipe; 2. Support; 3. Gravity conduit; 4. Dispersion hole; 5. Corrugated expansion pipe; 6. Return spring; 7. Linkage guide bar; 8. Second connecting sleeve; 9. Connecting spring; 10. First connecting sleeve; 11. Top rod; 12. Friction top pad; 13. Clamping plate; 14. Limiting top plate; 15. Synchronous pulley; 16. Synchronous belt; 17. Sealing rotating plate; 18. Connecting bushing; 19. Rotary arm; 20. Guide sleeve. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1-4 As shown, a construction process for bubble-mixed lightweight soil includes the following specific steps:

[0031] The first step is to excavate the road base, then make a mesh-like cut on the surface of the road base to create crisscrossing cut grooves. Then, the road base is compacted using equipment. The crisscrossing cut grooves make it easier to expose the hollow areas in the road base so that the hollow areas can be effectively compacted.

[0032] The second step is to lay a layer of crushed stone as a subbase after the road base is compacted. When laying the crushed stone, it is laid horizontally from one side of the road base to the other side. During the laying process, the crushed stone is rolled with rollers to ensure that the crushed stone is compacted on the road base in time and to ensure that the subbase is compact, thereby improving the efficiency of laying the subbase.

[0033] The third step is to prepare the corresponding amount of aerated lightweight soil according to the actual amount of aerated lightweight soil to be laid on the road surface after the crushed stone subbase is laid. The specific steps are as follows: First, the foaming agent and water are mixed to obtain foaming liquid. Then, compressed air is added to the foaming liquid to generate aerated liquid. Then, the curing material and water are stirred and mixed to obtain cement slurry. The cement slurry is mixed with the aerated liquid to obtain aerated lightweight soil. The specific mixing method is as follows: the cement slurry and the aerated liquid are introduced into the same container through conduits. When the two conduits are introduced into the material body, they move in a circular motion around the inside of the container. This can avoid the aerated liquid and cement slurry from accumulating in one place, thereby reducing the probability of squeezing the air bubbles and reducing the elimination of air bubbles, while facilitating the mixing of the two.

[0034] Step 4: The mixed aerated lightweight soil is laid onto the subgrade using a dispersing device, which includes a main pipe 1 and a support 2. The support 2 is connected to the bottom of the main pipe 1 to support it. The main pipe 1 is supported above the roadbed by the support 2. Multiple dispersing holes 4 are equidistantly spaced laterally at the bottom of the main pipe 1. Below each dispersing hole 4 is a gravity conduit 3 for guiding the discharge of the aerated lightweight soil. A corrugated telescopic pipe 5 connects the upper end of the gravity conduit 3 to the dispersing hole 4, facilitating its raising and lowering. This allows the gravity conduit 3 to descend close to the subgrade when the aerated lightweight soil needs to be discharged, preventing the aerated lightweight soil from being destroyed by excessive drop height and ensuring effective control of bulk density.

[0035] Each gravity conduit 3 has a return spring 6 connected to the main pipe 1 at one end. Multiple guide sleeves 20 are distributed horizontally at equal intervals below the main pipe 1. Each gravity conduit 3 slides through the corresponding guide sleeve 20, which facilitates the smooth up-and-down movement of the gravity conduit 3. A rotating sealing component is installed at the bottom of each gravity conduit 3. The rotating sealing component seals the bottom of the gravity conduit 3, allowing the air-bubbly mixed lightweight soil in the main pipe 1 to flow into the gravity conduit 3 for temporary storage. Then, the gravity conduit 3 slides down and lowers under the gravity of the air-bubbly mixed lightweight soil, approaching the cushion layer. When it is necessary to discharge the air-bubbly mixed lightweight soil, the rotating sealing component is rotated open. In this way, the air-bubbly mixed lightweight soil in the gravity conduit 3 is directly discharged onto the cushion layer, eliminating the drop height. During the discharge process, the gravity conduit 3 gradually rises due to the rebound force of the return spring 6, causing the air-bubbly mixed lightweight soil to accumulate layer by layer upwards.

[0036] The rotary sealing assembly includes a sealing rotating plate 17 and a connecting bushing 18. The connecting bushing 18 is fixedly connected to one side of the bottom of the gravity conduit 3. A rotating arm 19 is rotatably connected to the lower side of the connecting bushing 18 via a rotating shaft. The sealing rotating plate 17 is positioned at the bottom of the gravity conduit 3 and is connected to the rotating arm 19. The rotating arm 19 is used to drive the sealing rotating plate 17 to rotate, thereby controlling the opening and closing of the bottom of the gravity conduit 3.

[0037] Each gravity conduit 3 has a rotating sealing assembly at its bottom that works together with a linkage assembly. The linkage assembly includes a timing belt 16. Each connecting sleeve 18 has a timing wheel 15 that is coaxially connected to the corresponding rotating arm 19. The timing belt 16 is connected to each timing wheel 15. The timing belt 16 can make all the timing wheels 15 rotate synchronously, thereby driving all the rotating arms 19 to rotate synchronously, so that the sealing plate 17 can rotate synchronously.

[0038] Each guide sleeve 20 is equipped with a friction resistance mechanism for controlling the slow ascent of the gravity conduit 3. The friction resistance structure includes a friction pad 12, a push rod 11, and a first connecting sleeve 10. The first connecting sleeve 10 is connected to the upper side of the guide sleeve 20. The push rod 11 is inserted laterally into the first connecting sleeve 10. The friction pad 12 is connected to the end of the push rod 11 near the gravity conduit 3. A connecting spring 9 is connected between the end of the push rod 11 away from the gravity conduit 3 and the first connecting sleeve 10. The connecting spring 9 causes the push rod 11, along with the friction pad 12, to abut against the outer wall of the gravity conduit 3. When the gravity conduit 3 rises under the action of the return spring 6, the friction pad 12 generates friction resistance, reducing the rising speed of the gravity conduit 3 and avoiding affecting the discharge of the bubble-mixed lightweight soil.

[0039] The end of the top rod 11 away from the friction top pad 12 is connected to a second connecting sleeve 8. A linkage guide 7 is vertically slidably inserted inside the second connecting sleeve 8. Two clamping plates 13 are connected to the bottom of the linkage guide 7. A limiting top plate 14 that cooperates with the two clamping plates 13 is coaxially connected to the synchronous wheel 15. When the sealing rotating plate 17 closes the bottom of the gravity conduit 3, the limiting top plate 14 is between the two clamping plates 13 and abuts against the linkage guide 7. At this time, the friction top pad 12 and the gravity conduit 3 are separated, and the connecting spring 9 is in a stretched state to prevent the friction top pad 12 from hindering the gravity conduit 3 from descending after being filled with air-bubbly mixed lightweight soil. When the sealing rotating plate 17 rotates open, the rotating arm 19 and the synchronous wheel 15 rotate synchronously, driving the limiting top plate 14 to rotate and disengage from the clamping plates 13 and the linkage guide 7. Then the connecting spring 9 releases its elasticity, so that the friction top pad 12 abuts against the gravity conduit 3, which facilitates the gravity conduit 3 to slowly rise when discharging air-bubbly mixed lightweight soil.

[0040] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A construction process for bubble-mixed lightweight soil, characterized in that, The specific steps are as follows: The first step is to excavate the road base and make a mesh-like cut on the surface of the road base to create crisscrossing cut grooves. Then, the road base is compacted. The second step is to lay a layer of crushed stone as a subbase after the road surface base is compacted. The third step is to prepare air-bubble mixed lightweight soil after the crushed stone cushion layer is laid. Step 4: The mixed bubble-bubble lightweight soil is laid on the subbase using a dispersing device. The dispersing device includes a main pipe (1) and a support (2). The support (2) is connected to the bottom of the main pipe (1). The bottom of the main pipe (1) has multiple dispersing holes (4) at equal intervals. Each dispersing hole (4) is provided with a gravity conduit (3) to guide the bubble-bubble lightweight soil out. The upper end of the gravity conduit (3) is connected to the dispersing hole (4) with a corrugated telescopic pipe (5) to facilitate the lifting and lowering of the gravity conduit (3). Each gravity conduit (3) has a return spring (6) connected to the main pipe (1) on one side of its top end; multiple guide sleeves (20) are distributed horizontally at equal intervals below the main pipe (1), and each gravity conduit (3) slides through the corresponding guide sleeve (20); a rotating sealing component is provided at the bottom of each gravity conduit (3), which seals the bottom of the gravity conduit (3), allowing the air-bubbled lightweight soil in the main pipe (1) to flow into the gravity conduit (3) for temporary storage. Then, the gravity conduit (3) slides down and lowers under the gravity of the air-bubbled lightweight soil, and the rotating sealing component is rotated to open. During the discharge of the air-bubbled lightweight soil, the gravity conduit (3) gradually rises by relying on the rebound force of the return spring (6), allowing the air-bubbled lightweight soil to accumulate layer by layer upwards. The rotating sealing assembly includes a sealing rotating plate (17) and a connecting bushing (18). The connecting bushing (18) is fixedly connected to one side of the bottom of the gravity conduit (3). A rotating arm (19) is rotatably connected to the lower side of the connecting bushing (18) via a rotating shaft. The sealing rotating plate (17) is located at the bottom of the gravity conduit (3), and the sealing rotating plate (17) is connected to the rotating arm (19). The rotating arm (19) is used to drive the sealing rotating plate (17) to rotate and control the opening and closing of the bottom of the gravity conduit (3). A linkage component is provided between the rotating sealing assemblies at the bottom of each gravity conduit (3). The linkage component includes a timing belt (16), and each of the connecting bushings (18) is provided with a timing wheel (15) coaxially connected to the corresponding rotating arm (19). The timing belt (16) is connected to each timing wheel (15). The timing belt (16) can make all the timing wheels (15) rotate synchronously, thereby driving all the rotating arms (19) to rotate synchronously, so that the blocking plate (17) can rotate synchronously. Each of the guide sleeves (20) is provided with a friction resistance mechanism for controlling the slow ascent of the gravity conduit (3). The friction resistance mechanism includes a friction top pad (12), a top rod (11), and a first connecting sleeve (10). The first connecting sleeve (10) is connected to the upper side of the guide sleeve (20). The top rod (11) is inserted laterally into the first connecting sleeve (10). The friction top pad (12) is connected to the end of the top rod (11) near the gravity conduit (3). A connecting spring (9) is connected between the end of the top rod (11) away from the gravity conduit (3) and the first connecting sleeve (10). The connecting spring (9) causes the top rod (11) to bring the friction top pad (12) to abut against the outer wall of the gravity conduit (3). When the gravity conduit (3) rises under the action of the rebound force of the return spring (6), the friction top pad (12) generates friction resistance, reducing the rising speed of the gravity conduit (3). The top rod (11) is connected to a second connecting sleeve (8) at the end away from the friction top pad (12). A linkage guide (7) is vertically slidably inserted inside the second connecting sleeve (8). Two clamping plates (13) are connected to the bottom end of the linkage guide (7). A limiting top plate (14) that cooperates with the two clamping plates (13) is coaxially connected to the synchronous wheel (15). When the sealing plate (17) closes the bottom of the gravity conduit (3), the limiting top plate (14) is between the two clamping plates (13) and abuts against the linkage guide (7). At this time, the friction top pad (12) and the gravity conduit (3) are in a separated state, and the connecting spring (9) is in a stretched state.

2. The construction process for bubble-mixed lightweight soil according to claim 1, characterized in that, In the second step of laying the crushed stone subbase, the crushed stone is laid transversely from one side of the roadbed to the other, and rollers are used to roll the crushed stone during the laying process.

3. The construction process for bubble-mixed lightweight soil according to claim 1, characterized in that, The specific process for preparing bubble-mixed lightweight soil is as follows: First, a foaming agent and water are mixed to obtain a foaming liquid. Then, compressed air is added to the foaming liquid to generate bubble liquid. Next, a solidifying material and water are stirred and mixed to obtain a cement slurry. The cement slurry is then mixed with the bubble liquid to obtain bubble-mixed lightweight soil.

4. The construction process for bubble-mixed lightweight soil according to claim 3, characterized in that, The specific mixing method of cement slurry and aerated liquid is as follows: cement slurry and aerated liquid are introduced into the same container through conduits, and the two conduits move in a circular motion around the inside of the container.

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