A powder mixing system for lime-soil roadbed filling construction with lime and its application

Abstract

The present invention relates to the field of road engineering construction, and specifically to a powder mixing system for lime-soil roadbed filling construction with improved lime and its application, comprising mixing equipment, and also comprising: a pre-mixing control box, the pre-mixing control box is connected to the mixing equipment through a flattening connecting tube; a mixing control mechanism, the mixing control mechanism is connected to the two control support plates, and comprises a gravity detection component and an intermittent discharge component; the gravity detection component is connected to the control support plate, the intermittent discharge component is connected to the control support plate, and the intermittent discharge component is electrically connected to the gravity detection component. The powder mixing system proposed in the present invention is simple to operate, and can adjust the amount and inflow speed of the lime entering the mixing equipment according to the state of the lime, so as to ensure that the lime is fully and evenly mixed in the mixing equipment, so as to improve the quality and effect of lime production, and provide quality assurance for the subsequent lime filling construction stage.

Description

Technical Field

[0001] The invention relates to the field of road engineering construction, in particular to a powder mixing system for lime-mixed improved lime-soil roadbed filling construction and application thereof. Background Art

[0002] With the rapid development of transportation infrastructure and urban construction, hundreds of millions of cubic meters of drill slag waste soil are generated every year in engineering construction, which not only consumes a large amount of land resources, but also seriously pollutes the environment. At the same time, due to increasingly stringent ecological and environmental protection policies, many places have continuously tightened the mountain quarrying (slag) industry, and the slag filler faces problems such as tight material supply and gradually rising prices, resulting in a shortage of raw materials for roadbed filling, which seriously restricts urban construction and development. To solve the above two problems, a direct and effective strategy is to use drill slag waste soil as roadbed filling. However, drill slag waste soil generally has the characteristics of fine soil particles, high water content and high compressibility, and cannot be directly used for roadbed filling. Therefore, it is an important issue to be solved in engineering construction to complete the improvement and treatment of drill slag waste soil with low investment, high efficiency and large scale, so as to ensure that the fill roadbed has sufficient strength and stability.

[0003] At present, the traditional road mixing process has high requirements on the original soil source, low recycling rate of slag, poor uniformity of composite material mixing, poor particle fineness compliance rate, weak quality controllability, and easy dust generation during open-air mixing, which leads to environmental problems. Production is restricted by weather factors. Therefore, in view of the above situation, it is urgent to develop a powder mixing system and construction process for lime-modified lime-soil roadbed filling construction to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The object of the present invention is to provide a powder mixing system and construction process for lime-soil roadbed filling construction to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A powder mixing system for lime-soil roadbed filling construction with lime, including mixing equipment,

[0007] It also includes: a premixing control box, the premixing control box is connected to the mixing equipment through a flattening connecting tube, and two control support plates are fixedly installed in the premixing control box, and the two control support plates are arranged opposite to each other;

[0008] and a mixing control mechanism, the mixing control mechanism being connected to the two control support plates, wherein the mixing control mechanism comprises a gravity detection component and an intermittent discharge component;

[0009] The gravity detection component is connected to the control support plate, the intermittent discharge component is located above the gravity detection component and connected to the control support plate, and the intermittent discharge component is also electrically connected to the gravity detection component;

[0010] It also includes: a feed inlet, which is fixedly mounted on the top of the premixing control box and is located directly above the intermittent discharge assembly;

[0011] A discharge port, the discharge port being fixedly mounted at the bottom of the premix control box;

[0012] and a mixing discharge port, the mixing discharge port being connected to the bottom end of the mixing device;

[0013] It also includes: a uniform mixing port, one end of which is fixedly connected to the flattening connecting tube and communicates with the flattening connecting tube;

[0014] And a vibration detection device, wherein the vibration detection device is fixedly mounted on the flattening connecting cylinder.

[0015] As a further solution of the present invention: the gravity detection component includes:

[0016] A detection and pounding control box, the number of which is two, both of which are fixedly connected to the control support plate and symmetrically arranged at both ends of the control support plate;

[0017] Detection blade body 1 and detection blade body 2, the detection blade body 1 and detection blade body 2 are respectively connected to the two detection and pounding control boxes, and the number of the detection blade body 1 and the detection blade body 2 is multiple, and the multiple detection blade bodies 1 and the detection blade bodies 2 are distributed at intervals;

[0018] And a gravity detection part, the gravity detection part is connected with the detection and pounding control box, and is respectively connected with the detection blade body 1 and the detection blade body 2, and the gravity detection part is also electrically connected with the intermittent discharging component.

[0019] As a further solution of the present invention: the intermittent discharge assembly comprises:

[0020] An opening and closing sliding plate 1, wherein the number of the opening and closing sliding plates 1 is two, and the two opening and closing sliding plates 1 are respectively slidably mounted on the two control support plates;

[0021] The second opening and closing sliding plate is two in number, and the two second opening and closing sliding plates are respectively slidably mounted on the two control support plates and are respectively arranged opposite to the two first opening and closing sliding plates;

[0022] A material discharging and blocking unit, wherein the material discharging and blocking unit is respectively connected to the first opening and closing sliding plate and the second opening and closing sliding plate;

[0023] and a driving control unit, wherein the driving control unit is connected to the control support plate and is respectively connected to the first opening and closing sliding plate and the second opening and closing sliding plate.

[0024] As a further solution of the present invention: the discharge plugging unit comprises:

[0025] An inclined material guide plate 1, two sides of which are respectively fixedly connected to the two opening and closing sliding plates 2;

[0026] And an inclined material guide plate 2, the two sides of which are respectively fixedly connected to the two opening and closing sliding plates 1, and the inclined material guide plate 2 is also slidably connected to the inclined material guide plate 1, wherein a material discharge port is provided between the inclined material guide plate 1 and the inclined material guide plate 2, and the material discharge port is located above the detection blade body 1 and the detection blade body 2.

[0027] As a further solution of the present invention: the drive control unit includes:

[0028] A telescopic cylinder, the telescopic cylinder is fixedly connected to the control support plate;

[0029] A lifting slide, the lifting slide is slidably connected to the control support plate and fixedly connected to the output end of the telescopic cylinder, and a gravity detection controller is also fixedly installed on the lifting slide, and the gravity detection controller is electrically connected to the telescopic cylinder and the gravity detection part respectively;

[0030] And a push-pull rod 1 and a push-pull rod 2, one end of the push-pull rod 1 and the push-pull rod 2 are both rotatably connected to the lifting slide plate, and the other ends of the push-pull rod 1 and the push-pull rod 2 are respectively rotatably connected to the opening and closing sliding plate 1 and the opening and closing sliding plate 2.

[0031] As a further solution of the present invention: it also includes: a crushing support, the number of the crushing support is two sets, the two sets of the crushing support are respectively located on both sides of the control support plate, and each set of the crushing support is fixedly installed with a driving motor;

[0032] A crushing crankshaft 1, wherein the crushing crankshaft 1 is rotatably connected to one set of the crushing supports and is fixedly connected to an output end of one of the drive motors, and a plurality of cranks 1 are provided on the crushing crankshaft 1;

[0033] A second crushing crankshaft, wherein the second crushing crankshaft is rotatably connected to another set of the crushing supports and is fixedly connected to an output end of another drive motor, and a plurality of second cranks are arranged on the second crushing crankshaft;

[0034] And a telescopic mashing assembly, the number of the telescopic mashing assembly is two sets, the two sets of the telescopic mashing assembly are respectively connected to the crank one and the crank two, and are respectively connected to the inclined material guide plate two and the inclined material guide plate one.

[0035] As a further solution of the present invention: the telescopic crushing assembly comprises:

[0036] Connecting rods, the number of the connecting rods is multiple, and one end of the multiple connecting rods is rotatably connected to the crank 1 and crank 2 respectively;

[0037] and a cross-shaped blade, wherein the number of the cross-shaped blades is plural, the multiple cross-shaped blades are rotatably connected to the other ends of the multiple connecting rods respectively, and the multiple cross-shaped blades are respectively inserted on the inclined material guide plate 1 and the inclined material guide plate 2, and are slidably connected to the inclined material guide plate 1 and the inclined material guide plate 2 respectively;

[0038] The multiple cross-shaped blades on the first inclined material guide plate and the multiple cross-shaped blades on the second inclined material guide plate are distributed in an interval manner.

[0039] The above-mentioned powder mixing system is applied to the lime-soil roadbed filling construction process of improving lime soil by mixing lime, and the process specifically includes the following steps:

[0040] S1. Original soil preparation stage:

[0041] a. Separate the soil preparation, determine the amount of slag storage according to the production volume of each batch of ash soil, and pile up the slag in an orderly manner according to different slag discharge periods;

[0042] b. Turn over and dry naturally, take temporary drainage and rain protection measures to ensure that the raw soil entering the factory can achieve the best natural drying effect to reduce the amount of ash, and dry naturally for seven days as a time period;

[0043] c. Determination of moisture content before entering the factory. Before the raw soil enters the factory for production, the moisture content of the batch of raw soil must be tested to guide the dosage of ash. The moisture content of the raw soil entering the factory should be controlled below 30% as much as possible;

[0044] S2, lime soil processing stage in the factory:

[0045] First, the original soil and quicklime are quantitatively added and then calcined. After the calcination is completed, the calcination and feeding are carried out in sequence, so that the crushed soil source enters the forced mixer through the conveyor belt for mixing. Finally, after crushing and mixing, it is tested and shipped out of the factory, and then transported to the site for filling construction;

[0046] S3, lime soil filling construction stage:

[0047] The ash soil obtained in step S2 is spread on the road surface, and is rolled and cured. Finally, after the density and ash dosage are tested and meet the requirements, the next layer of construction is carried out.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] 1. This process uses a special consolidation soil powder mixing production line to achieve factory-based centralized production, CNC batching, batch inspection of finished products before leaving the factory, and direct feeding and filling after passing the inspection. Moreover, general engineering waste soil can be recycled as a resource. It realizes the transformation from traditional road mixing technology to factory-based centralized production technology, with more stable and controllable quality; high efficiency of assembly line operation, saving production costs; recycling of construction waste soil, saving resources, and green environmental protection;

[0050] 2. The powder mixing system for lime-doped improved lime-soil roadbed filling construction in this application is simple to operate and can adjust the amount and inflow rate of lime soil entering the mixing equipment according to the state of the lime soil, thereby ensuring that the lime soil is fully and evenly mixed in the mixing equipment, so as to improve the quality and effect of lime soil production, provide quality assurance for the subsequent lime soil filling construction stage, and provide convenience for the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 The present invention is a flowchart of the construction process of lime-soil roadbed filling improved by lime in an embodiment of the present invention.

[0052] Figure 2 This is a flow chart of the processing process of ash soil in a factory in an embodiment of the present invention.

[0053] Figure 3 It is a schematic diagram of the three-dimensional structure of the mixing equipment in an embodiment of the present invention.

[0054] Figure 4 It is a schematic diagram of the three-dimensional structure of the premixing control box in an embodiment of the present invention.

[0055] Figure 5 It is a schematic diagram of the three-dimensional structure of the vibration detection device in an embodiment of the present invention.

[0056] Figure 6 It is a schematic diagram of the three-dimensional structure of the control support plate in an embodiment of the present invention.

[0057] Figure 7 It is a schematic diagram of the three-dimensional structure of the lifting slide plate in an embodiment of the present invention.

[0058] Figure 8 It is a schematic diagram of the three-dimensional structure of the distribution of the inclined material guide plate 1 and the inclined material guide plate 2 in an embodiment of the present invention.

[0059] Fig. 9 It is a schematic diagram of the three-dimensional structure of the feed opening in an embodiment of the present invention.

[0060] Fig.10 It is a schematic diagram of the side view structure of a crushing crankshaft 1 in an embodiment of the present invention.

[0061] Fig.11 It is a three-dimensional structural schematic diagram of the distribution of transmission parts in an embodiment of the present invention.

[0062] Fig.12 It is a schematic diagram of the three-dimensional structure of the crushed crankshaft 2 in an embodiment of the present invention.

[0063] Fig.13 It is a schematic diagram of the three-dimensional structure of the distribution of the detection blade body 1 and the detection blade body 2 in the embodiment of the present invention.

[0064] In the figure: 1-mixing equipment, 2-leveling connecting cylinder, 3-uniform mixing port, 4-premixing control box, 5-feeding port, 6-inspection cover, 7-discharge port, 8-detection vibration equipment, 9-mixing discharge port, 10-control support plate, 11-telescopic cylinder, 12-opening and closing sliding plate 1, 13-push-pull rod 1, 14-inclined guide plate 1, 15-inclined guide plate 2, 16-opening and closing sliding plate 2, 17-push Pull rod two, 18-lifting slide plate, 19-cross-shaped blade, 20-gravity detection controller, 21-crushing support, 22-feeding port, 23-crushing crankshaft one, 24-crank one, 25-connecting rod, 26-transmission part, 27-detection and crushing control box, 28-detection blade one, 29-detection blade two, 30-crushing crankshaft two, 31-crank two, 32-gravity detection part, 33-driving motor. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0067] A powder mixing system for lime-soil roadbed filling construction, please refer to Figure 3-Figure 13 , including a mixing device 1 (here, the device with announcement number CN102015085B or a similar device thereof may be adopted, which is a prior art and will not be described in detail in this case), and also including:

[0068] A premixing control box 4, which is connected to the mixing device 1 through the flattening connecting tube 2, and two control support plates 10 are fixedly installed in the premixing control box 4, and the two control support plates 10 are arranged opposite to each other;

[0069] and a mixing control mechanism, the mixing control mechanism is connected to the two control support plates 10, wherein the mixing control mechanism includes a gravity detection component and an intermittent discharge component;

[0070] The gravity detection component is connected to the control support plate 10, the intermittent discharge component is located above the gravity detection component and is connected to the control support plate 10, and the intermittent discharge component is also electrically connected to the gravity detection component.

[0071] See also Figure 1-Figure 13 , further comprising: a feed port 5, the feed port 5 being fixedly mounted on the top of the premixing control box 4 and being located directly above the intermittent discharge assembly;

[0072] The discharge port 7 is fixedly installed at the bottom of the premix control box 4;

[0073] And a mixing discharge port 9, which is connected to the bottom end of the mixing device 1.

[0074] The invention also includes: a uniform mixing material port 3, one end of which is fixedly connected to the flattening connecting tube 2 and communicates with the flattening connecting tube 2;

[0075] And a detection vibration device 8, which is fixedly installed on the flattened connecting tube 2.

[0076] In the process of mixing ash and soil in step S2 of the ash-soil roadbed filling construction process, first, the mixing equipment 1 and the pre-mixing control box 4 can be fixed in the specified area, so that the height of the pre-mixing control box 4 is greater than the height of the mixing equipment 1, and the crushed ash and soil are fed upward to the top of the feed port 5 through the conveyor belt on the conveyor. At this time, the ash and soil will fall into the pre-mixing control box 4 under the action of its own gravity, and enter the intermittent discharge component, and then, as the ash and soil continue to flow downward, it will enter the flattening connecting tube 2 after passing through the gravity detection component, wherein the gravity detection component has a filtering function, which will block the granular or blocky raw materials in the ash and soil. Please refer to the following content. When the dust particles are relatively uniform and small in size, the gravity detection component will not be put into operation (at this time, the dust particles are uniform and small in size, which is convenient for the mixing operation in the mixing equipment 1 at a later time. Therefore, when the installation amount is not reached in the mixing equipment 1, the intermittent discharge component does not need to be operated to block the dust flowing into the leveling connection tube 2 from the pre-mixing control box 4. After the specified amount of dust is reached in the mixing equipment 1, the intermittent discharge component can be manually operated, or the mixing operation can be carried out synchronously while the dust enters the mixing equipment 1, and the dust that meets the mixing requirements is discharged from the outside of the equipment through the mixing discharge port 9 to enter the next process). , thereby achieving the effect of dynamic mixing and improving production efficiency, which will not be elaborated here), and when a part of the ash and soil has more lumps and larger sizes, at this time, it means that the effect of subsequent ash and soil mixing in the mixing equipment 1 may be affected. Under the filtering effect of the gravity detection component on the ash and soil, when it reaches a certain weight, the gravity detection component will start the intermittent discharge component to stop the ash and soil in the pre-mixing control box 4 from entering the mixing equipment 1, thereby leaving enough mixing time for the ash and soil with larger particle sizes and more particles in the mixing equipment 1. Among them, the mixing equipment 1 can adopt the existing mixer and can be provided with the function of crushing the ash and soil. This will not be elaborated in detail. In addition, when the ash and soil enter the leveling connecting tube 2 in a dispersed state, other reagents, such as a curing agent, can be added to the ash and soil in a dispersed state in the leveling connecting tube 2 through the uniform mixing port 3, so that the curing agent can be fully mixed into the ash and soil in a flowing and dispersed state, thereby facilitating the improvement of the subsequent mixing effect of the ash and soil in the mixing equipment 1. The operation is simple, and the amount and inflow speed of the ash and soil entering the mixing equipment 1 can be adjusted according to the state of the ash and soil, thereby ensuring that the ash and soil are fully and evenly mixed in the mixing equipment 1, so as to improve the quality and effect of ash and soil production, provide quality assurance for the subsequent ash and soil filling construction stage, and provide convenience for the staff.

[0077] In one embodiment of the present invention, see Figure 3-Figure 13 , gravity detection components include:

[0078] Detection and crushing control boxes 27, the number of which is two, both of which are fixedly connected to the control support plate 10 and symmetrically arranged at both ends of the control support plate 10;

[0079] A detection blade body 1 28 and a detection blade body 2 29, wherein the detection blade body 1 28 and the detection blade body 2 29 are respectively connected to two detection pounding control boxes 27, and the number of the detection blade body 1 28 and the detection blade body 2 29 is multiple, and the multiple detection blade bodies 1 28 and the detection blade bodies 2 29 are spaced apart from each other;

[0080] And a gravity detection part 32, the gravity detection part 32 is connected to the detection mashing control box 27, and is respectively connected to the detection blade body 1 28 and the detection blade body 2 29, and the gravity detection part 32 is also electrically connected to the intermittent discharging component.

[0081] Intermittent discharge components include:

[0082] An opening and closing sliding plate 12, the number of the opening and closing sliding plates 12 is two, and the two opening and closing sliding plates 12 are slidably mounted on the two control support plates 10 respectively;

[0083] The second opening and closing sliding plate 16, the number of the second opening and closing sliding plate 16 is two, the two second opening and closing sliding plates 16 are respectively slidably mounted on the two control support plates 10, and are respectively arranged opposite to the two first opening and closing sliding plates 12;

[0084] A discharging and blocking unit, which is respectively connected to the opening and closing sliding plate 12 and the opening and closing sliding plate 2 16;

[0085] And a driving control unit, which is connected to the control support plate 10 and is respectively connected to the opening and closing sliding plate 12 and the opening and closing sliding plate 2 16.

[0086] The discharge plugging unit includes:

[0087] An inclined material guide plate 14, both sides of which are fixedly connected to two opening and closing sliding plates 2 16;

[0088] And the inclined material guide plate 2 15, the two sides of the inclined material guide plate 2 15 are respectively fixedly connected to the two opening and closing sliding plates 12, and the inclined material guide plate 2 15 is also slidably connected to the inclined material guide plate 14, wherein a feed discharge port 22 is provided between the inclined material guide plate 14 and the inclined material guide plate 2 15, and the feed discharge port 22 is located above the detection blade body 1 28 and the detection blade body 2 29.

[0089] The drive control unit includes:

[0090] Telescopic cylinder 11, which is fixedly connected to control support plate 10;

[0091] A lifting slide 18, the lifting slide 18 is slidably connected to the control support plate 10, and is fixedly connected to the output end of the telescopic cylinder 11, and a gravity detection controller 20 is also fixedly installed on the lifting slide 18, and the gravity detection controller 20 is electrically connected to the telescopic cylinder 11 and the gravity detection part 32 respectively;

[0092] And a push-pull rod 13 and a push-pull rod 2 17, one end of the push-pull rod 13 and the push-pull rod 2 17 are rotatably connected to the lifting slide 18, and the other end of the push-pull rod 13 and the push-pull rod 2 17 are rotatably connected to the opening and closing sliding plate 12 and the opening and closing sliding plate 2 16 respectively.

[0093] After the ash enters the premixing control box 4, it will enter the space surrounded by the inclined material guide plate 1 14 and the inclined material guide plate 2 15, and under the guidance of the inclined material guide plate 1 14 and the inclined material guide plate 2 15, it will eventually flow through the discharge port 22 to the multiple detection blades 1 28 and the detection blades 2 29. By setting up the multiple detection blades 1 28 and the detection blades 2 29, on the one hand, when the ash flows downward under the action of its own gravity, the ash can contact the detection blades 1 28 and the detection blades 2 29 with a certain impulse, so that some particles or lumps of ash with smaller particles can be broken and flow downward. Among them, the inner bottom wall of the premixing control box 4 is an inclined structure, and the inclined structure is connected to the inlet of the flattening connecting tube 2, so that the broken ash will flow to the flattening connecting tube 2. On the other hand, when the particles are relatively large and there are a lot of large particles of dust, the dust will accumulate on the detection blade body 1 28 and the detection blade body 2 29. When the dust accumulates to a certain amount, the gravity detection part 32 starts working and controls the telescopic cylinder 11 to start, and the telescopic cylinder 11 will pull the detection blade body 1 28 downward. At this time, through the pulling force of the push-pull rod 1 13 and the push-pull rod 2 17, the opening and closing sliding plate 1 12 and the opening and closing sliding plate 2 16 can be synchronized and moved toward each other. When the opening and closing sliding plate 1 12 and the opening and closing sliding plate 2 16 both slide on the control support plate 10 toward the middle of the control support plate 10, they will drive the inclined material guide plate 1 14 and the inclined material guide plate 2 15 to move synchronously, and finally the discharge port 22 will be closed (gravity detection The controller 20 may also adopt the function of controlling the opening and closing of the conveyor at the same time). At this time, the ash and soil in the premixing control box 4 cannot continue to flow downward, and during the blocking process of the inclined guide plate 1 14 and the inclined guide plate 2 15, the gravity detection controller 20 controls the detection and crushing control box 27 to start, wherein the detection and crushing control box 27 may adopt a box structure, and a crankshaft structure is arranged in the box, the box may protect the crankshaft to prevent ash and soil from falling onto the crankshaft, and a plurality of cranks are arranged on the crankshaft, each of which is equipped with a detection blade 1 28 or a detection blade 2 29, and an angle may be set between each crank, or an angle may not be set, all of which are prior art and will not be described in detail here, then when the power source drives the crankshaft to rotate , which will cause multiple detection blades 1 28 and detection blades 2 29 to move back and forth (when there is an angle between the cranks, multiple detection blades 1 28 and detection blades 2 29 will also move asynchronously), as the detection blades 1 28 and detection blades 2 29 move erroneously, the dust particles on top of them can be crushed and made to fall downward until all the dust particles on the detection blades 1 28 and detection blades 2 29 fall down, and in this process, the large dust particles in the mixing equipment 1 are also continuously crushed. Since the large dust particles are mixed in batches, and the larger the particle size and the more large particles there are, the less the amount of mixing in the mixing equipment 1, thereby achieving the purpose of sufficient and uniform mixing, thereby ensuring the quality and effect of production.

[0094] In one embodiment of the present invention, see Figure 3-Figure 13 , further comprising: a crushing support 21, the number of the crushing support 21 is two sets, the two sets of crushing supports 21 are respectively located on both sides of the control support plate 10, and each set of crushing supports 21 is fixedly mounted with a driving motor 33;

[0095] A crushing crankshaft 23, which is rotatably connected to one set of crushing supports 21 and fixedly connected to an output end of one of the driving motors 33, and a plurality of cranks 24 are provided on the crushing crankshaft 23;

[0096] A second crushing crankshaft 30, which is rotatably connected to another set of crushing supports 21 and fixedly connected to an output end of another driving motor 33, and a plurality of second cranks 31 are provided on the second crushing crankshaft 30;

[0097] And the telescopic crushing assembly, the number of the telescopic crushing assembly is two sets, the two sets of telescopic crushing assemblies are respectively connected to the crank 1 24 and the crank 2 31, and are respectively connected to the inclined material guide plate 2 15 and the inclined material guide plate 1 14.

[0098] The telescopic mashing assembly includes:

[0099] Connecting rod 25, the number of connecting rod 25 is multiple, and one end of each of the multiple connecting rods 25 is rotatably connected to crank 1 24 and crank 2 31 respectively;

[0100] and a cross-shaped blade 19, wherein the number of the cross-shaped blades 19 is plural, and the multiple cross-shaped blades 19 are rotatably connected to the other ends of the multiple connecting rods 25, respectively, and the multiple cross-shaped blades 19 are respectively inserted on the inclined material guide plate 14 and the inclined material guide plate 2 15, and are respectively slidably connected to the inclined material guide plate 14 and the inclined material guide plate 2 15;

[0101] The plurality of cross-shaped blades 19 on the first inclined material guide plate 14 and the plurality of cross-shaped blades 19 on the second inclined material guide plate 15 are distributed in an interval manner.

[0102] When the ash is transported to the feed port 5 via the conveyor belt, the multiple cross-shaped blades 19 can perform a certain pre-crushing function on the ash when the ash enters between the inclined guide plate 14 and the inclined guide plate 2 15 with a certain impulse. When the inclined guide plate 14 and the inclined guide plate 2 15 are closed, the ash blocked between the inclined guide plate 14 and the inclined guide plate 2 15 may still be of large particle size and with more large particles. In order to ensure the efficiency of subsequent production and avoid frequent blocking, during the period when the inclined guide plate 14 and the inclined guide plate 2 15 are closed, the gravity detection controller 20 can control the drive motor 33 to start, and the two drive motors 33 will simultaneously drive the crushing crankshaft 1 23 and the crushing crankshaft 2 30 to rotate, and drive the multiple cranks 1 24 and the cranks 2 31 to rotate, thereby driving the multiple cross-shaped blades through the multiple connecting rods 25. The body 19 reciprocates on the inclined guide plate 1 14 and the inclined guide plate 2 15, so that the ash and soil blocked between the inclined guide plate 1 14 and the inclined guide plate 2 15 can be crushed. In addition, the angle between the multiple cranks 1 24 and the crank 2 31 can be designed according to actual conditions, so that the cross-shaped blade 19 located on the inclined guide plate 1 14 and the inclined guide plate 2 15 can move in an offset manner, so as to achieve the purpose of sufficient crushing. No further details will be given here. In addition, the crankshaft on the detection and crushing control box 27 can also be connected to the crushing crankshaft 1 23 and the crushing crankshaft 2 30 respectively through the multiple transmission parts 26 set up, so that the cross-shaped blade 19, the detection blade 1 28 and the detection blade 2 29 can be linked together, which can not only save resources, but also can simultaneously perform crushing work during the period when the inclined guide plate 14 and the inclined guide plate 2 15 are blocked, thereby ensuring the efficiency of production work.

[0103] See also Figure 1-Figure 2 The embodiment of the present invention provides a lime-added improved lime-soil roadbed filling construction process, comprising the following steps:

[0104] S1. Original soil preparation stage:

[0105] a. Separate the soil preparation, determine the amount of slag storage according to the production volume of each batch of ash soil, and pile up the slag in an orderly manner according to different slag discharge periods;

[0106] b. Turn over and dry naturally, take temporary drainage and rain protection measures to ensure that the raw soil entering the factory can achieve the best natural drying effect to reduce the amount of ash added. Generally, seven days of natural drying is considered a time period;

[0107] c. Determination of moisture content before entering the factory. Before the raw soil enters the factory for production, the moisture content of the batch of raw soil must be tested to guide the dosage of ash. The moisture content of the raw soil entering the factory should be controlled below 30% as much as possible;

[0108] S2, lime soil processing stage in the factory:

[0109] First, the original soil and quicklime are quantitatively added and then calcined. After the calcination is completed, the calcination and feeding are carried out in sequence, so that the crushed soil source enters the forced mixer through the conveyor belt for mixing. Finally, after crushing and mixing, it is tested and shipped out of the factory, and then transported to the site for filling construction;

[0110] S3, lime soil filling construction stage:

[0111] The ash soil obtained in step S2 is spread on the road surface, and is rolled and cured. Finally, after the density and ash dosage are tested and meet the requirements, the next layer of construction is carried out.

[0112] The basic principle of the construction technology of pipeline-type ash-mixed improved drilling slag ash soil roadbed filling is: first add block ash and stewed ash to the naturally air-dried drilling slag waste soil, use hydration reaction to change the occurrence form of pore water in the waste soil, and release a large amount of heat to further evaporate the pore water, thereby reducing the soil moisture content to a reasonable range, and then feed it to the pipeline for crushing, and carry out secondary ash mixing, using the gelling, hardening and expansion effects produced by chemical reactions to modify and bond the particles, improve the mechanical strength of the drilling slag waste soil, and finally carry out multiple forced mixing to make the powder ash and waste soil fully contact, and improve the uniformity and stability of the improved drilling slag waste soil. The basic construction steps are: turn the original drilling slag waste soil over and dry it naturally, transport it to the factory, add block ash and stewed ash and stir it continuously, and enter the feeding bin for pre-treatment of the mixture after being processed by the soil source crusher, and then send it to the crusher for crushing through the conveyor belt, add ground quicklime for secondary ash mixing, mix it evenly in the mixing plant, and carry out product quality inspection after turning and curing, and transport it to the roadbed site for filling after passing the inspection. Specifically include the following:

[0113] S1. Original soil preparation stage:

[0114] a. Separate the soil preparation, determine the amount of slag storage at each batch according to the production volume of each batch of ash soil, and pile up the slag in order according to different slag discharge periods. It is not advisable to mix new and old materials to ensure the natural precipitation time;

[0115] b. Turn over and dry naturally, take temporary drainage and rain protection measures to ensure that the raw soil entering the factory can achieve the best natural drying effect to reduce the amount of ash added. Generally, 7 days of natural drying is considered a time period;

[0116] c. Determination of moisture content before entering the factory. Before the raw soil enters the factory for production, the moisture content of the batch of raw soil must be tested to guide the dosage of ash. The moisture content of the raw soil entering the factory should be controlled below 30% as much as possible;

[0117] S2, lime soil processing stage in the factory:

[0118] a. Production site requirements: closed plant, ceiling height to meet the safe working distance when the top of the simmered soil pile is 5 meters, the site in the plant is fully hardened, and lighting and ventilation holes are set. Equipment configuration: configure the crushing and mixing production line according to the production plan requirements, and equip with sufficient mixing excavators, forklifts, etc., equipped with metering and weighing devices. Material preparation: mainly for the preparation of main materials such as quicklime blocks, ground ash and cement, the minimum preparation quantity should meet the production volume requirements of three batches;

[0119] b. Lime slagging: Calculate the amount of lime slagging according to the weight and moisture content of each batch of raw soil entering the factory. Quantify the raw soil and quicklime to control the lime slagging ratio. The quicklime content should not be less than 6% (effective lime dosage should not be less than 5%). Lime slagging should be carried out in layers, with the thickness of the layers controlled at about 1 meter. Use an excavator to pile the slagging, and the top layer of the slagging should be the soil layer to ensure the lime slagging and precipitation effects. The total height of the slagging should be controlled below 5 meters. The initial lime slagging time is generally controlled at about 48 hours.

[0120] c. Turning and stewing. The turning and stewing is done by excavator or forklift. After the first turning and stewing, the stewing time is controlled at about 24 hours, followed by the second turning and stewing, and the stewing time is controlled at about 12 hours. After the second stewing is completed, the moisture content is measured. When the moisture content reaches below 21%, it can enter the powder mixing production line for further processing. If the moisture content is high, the stewing time needs to be extended to meet the requirements.

[0121] d. Feeding, start the conveyor, use excavators and other lifting equipment to grab soil from the stockpile and put it into the conveyor hopper. The mixed material enters the soil-rock separator through the feeding bin, and the oversized material (greater than 5cm) is separated and removed to reduce the pure soil and avoid the damage of large-sized stones to the equipment. It enters the secondary crushing equipment for more complete crushing, removes the stones in the material source, and realizes the transformation from agglomeration to granulation.

[0122] e. The crushed soil source enters the forced mixer through the conveyor belt, and the curing agent of 1% to 2% is automatically added for the second time through the operation room, and mixed evenly to ensure the ash dosage in the source, mainly to make up for the amount of lime lost during the stewing (turning) process. In actual operation, it should be determined according to the stewing amount of ash. The amount of ground ash should be controlled within 2%, because the time from entering the production line to the on-site construction is generally short, and there is no time to fully digest and produce arching disease (lime digestion produces 1-3 times of volume expansion). Another function of adding ash is to further reduce the water content;

[0123] f. Crushing and mixing: Test run and check the powder mixing production line to ensure the normal working condition of the system. The soil material falls into the crusher through the conveyor belt and is continuously mixed. The process is fully automatic and continuous. After the mixing is completed, the material automatically falls out from the lower port. The primary mixing material is crushed and mixed for deep processing through the high-frequency, high-speed and high-density cone impact of the powder mixer. After deep processing, the fineness modulus of the soil particles reaches 0-5mm (the content of super-sized soil particles should not be greater than 10%), and the maximum particle size of the stone particles is not greater than 4cm, so as to increase the combined surface area of ​​the soil particles and the ash (cement) agent, thereby enhancing the calcification and compaction effect. Designate a special person to supervise the operation status of the system throughout the process, and make timely adjustments if abnormalities are found;

[0124] g. Before leaving the factory, the finished clinker should be stacked in sections according to the batch time period. The clinker after adding cement should be transported to the site in time and completed before the initial setting. Each batch of clinker should be tested in time, and only when the relevant indicators meet the requirements can it be transported to the site for filling construction;

[0125] S3, lime soil filling construction stage:

[0126] a. Site preparation: determine the test section according to the first-piece system requirements, and the length should be controlled at about 200 to 300 meters. Clean, level and compact the site, dig a temporary drainage ditch outside the edge and drain the accumulated water in time, and prepare rainproof cloth according to daily output. Construction equipment preparation: bulldozers, excavators, vibratory rollers, steel-wheel rollers, rubber-wheel rollers (top layer), graders, earth-moving machines (to break up lumps of soil in time) and sealed transport vehicles are configured according to standards. The specific number is configured according to the standard to meet the construction requirements; test the compactness of the foundation before filling. Standardized construction preparation: laying geogrids, grid unloading, layered filling control wires, etc.;

[0127] b. Spreading: Spreading is done by excavator combined with bulldozer, and it is advisable to pull wire control. The thickness of layered loose paving shall not be greater than 30cm, and the thickness of the first layer shall be controlled at 28cm to ensure the passage of material transport vehicles, but it is necessary to strengthen rolling to ensure the density of the bottom layer. The top surface of layered paving should be set with a horizontal slope of not less than 2% to facilitate drainage, and the excess width of each layer on one side shall be controlled at 50cm;

[0128] c. Rolling. The initial compaction is carried out in sections. The length of each section should be controlled to be about 30 meters away from the paving surface. The initial compaction is carried out by static compaction with a vibratory roller for 2 to 3 times, and then vibratory rolling for 4 times. The compaction is stacked from the middle to both sides in sequence until there is no obvious indentation. Scrape and fill the material. After the static compaction is completed, the surface is scraped flat with a grader. Local material shortages are manually filled, and then vibratory rolling is carried out to ensure the overall compaction effect. Re-compacting. A three-steel wheel roller is used for re-compacting 3 to 5 times to further improve the rolling uniformity and surface flatness. Extrusion is generally carried out in the 96 area with roadbed compaction requirements. A rubber wheel roller is used for rolling 4 to 6 times to ensure that the compaction meets the requirements and the surface can be dense and smooth. Tamping the edges. After each layer of rolling is completed, an excavator or other special machinery is used to repair and compact the loose materials on the slope;

[0129] d. Maintenance: After the lime soil layer mixed with cement is rolled, it must be covered with geotextile to keep it moist for at least 5 days before the upper layer can be constructed. The soil layer mixed with pure lime can be constructed in layers continuously without maintenance. Construction vehicles should be prohibited from driving directly on the surface on rainy days to prevent the wheels from gnawing on the surface. For the top layer or inter-layer construction with a long interval, it must be covered with geotextile for 5 to 7 days before it can be opened to traffic. Measures should be taken to prevent the slope from being eroded by rainwater during the maintenance process;

[0130] e. Testing: After each layer of ash soil is completed, the density and ash dosage tests must be carried out. Only when they meet the requirements can the next layer be constructed. In addition to the above tests, the top layer of the roadbed must also undergo a bend test after maintenance;

[0131] f. According to the implementation of the test section, relevant parameters such as loose laying coefficient, number of rolling times, optimal moisture content, minimum ash content and curing time are sorted out and summarized to provide a basis for the subsequent full-scale construction.

[0132] The surface layer of the foundation of this project is mainly silt and silt sand, with a thickness of generally 15~35m. Below it is a rounded gravel layer with a large thickness variation, which is the bearing layer of the friction pile of this project. Below it is limestone and sandstone, which is the bearing layer of the pile end of the pile foundation of this project. From the perspective of geological conditions, the main components of drill slag are mud mixed with small gravel, sand, sand pebbles, pebbles, etc., and its gradation composition is related to geological conditions and construction technology; before paving the test section, the raw material detection test, standard compaction test, CBR test, EDTA ash dosage standard curve and unconfined compressive strength test of the filler are carried out in accordance with the "Highway Geotechnical Test Regulations" and "Highway Engineering Inorganic Binder Stabilized Material Test Regulations". The soil source test adopts a comprehensive multi-point method for sampling, and physical and mechanical properties related tests are used.

[0133] In summary, compared with the traditional process, the traditional road mixing process has high requirements for the original soil source, low recycling rate of slag, poor uniformity of composite material mixing, poor particle fineness compliance rate, weak quality controllability, and easy dust generation in open-air mixing, which leads to environmental problems, and production is restricted by weather factors;

[0134] This process uses a special consolidation soil powder mixing production line to achieve factory-based centralized production, CNC batching, batch inspection of finished products before delivery, and direct feeding and filling after passing the inspection. Moreover, general engineering waste can be recycled. It realizes the transformation from traditional road mixing process to factory-based centralized production process, with more stable and controllable quality; high efficiency of assembly line operation, saving production costs; recycling of construction waste, saving resources, and green environmental protection

[0135] It should be noted that in the present invention, unless otherwise clearly specified and limited, the terms "slide", "rotate", "fix", "have" and the like should be understood in a broad sense, for example, it can be a welding connection, a bolt connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0136] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A powder mixing system for lime-soil roadbed filling construction, including mixing equipment, characterized in that: Also includes: A premixing control box, the premixing control box is connected to the mixing equipment through a flattening connecting tube, and two control support plates are fixedly installed in the premixing control box, and the two control support plates are arranged opposite to each other; and a mixing control mechanism, the mixing control mechanism being connected to the two control support plates, wherein the mixing control mechanism comprises a gravity detection component and an intermittent discharge component; The gravity detection component is connected to the control support plate, the intermittent discharge component is located above the gravity detection component and connected to the control support plate, and the intermittent discharge component is also electrically connected to the gravity detection component; The gravity detection component comprises: A detection and pounding control box, the number of which is two, both of which are fixedly connected to the control support plate and symmetrically arranged at both ends of the control support plate; Detection blade body 1 and detection blade body 2, the detection blade body 1 and detection blade body 2 are respectively connected to the two detection and pounding control boxes, and the number of the detection blade body 1 and the detection blade body 2 is multiple, and the multiple detection blade bodies 1 and the detection blade bodies 2 are distributed at intervals; and a gravity detection unit, the gravity detection unit is connected to the detection and pounding control box, and is respectively connected to the detection blade body 1 and the detection blade body 2, and the gravity detection unit is also electrically connected to the intermittent discharging assembly; It also includes: a feed inlet, which is fixedly mounted on the top of the premixing control box and is located directly above the intermittent discharge assembly; A discharge port, the discharge port being fixedly mounted at the bottom of the premix control box; and a mixing discharge port, the mixing discharge port being connected to the bottom end of the mixing device; It also includes: a uniform mixing port, one end of which is fixedly connected to the flattening connecting tube and communicates with the flattening connecting tube; And a vibration detection device, wherein the vibration detection device is fixedly mounted on the flattening connecting cylinder.

2. A powder mixing system for lime-soil roadbed filling construction with lime-mixed improved soil according to claim 1, characterized in that: The intermittent discharge assembly comprises: An opening and closing sliding plate 1, wherein the number of the opening and closing sliding plates 1 is two, and the two opening and closing sliding plates 1 are respectively slidably mounted on the two control support plates; The second opening and closing sliding plate is two in number, and the two second opening and closing sliding plates are respectively slidably mounted on the two control support plates and are respectively arranged opposite to the two first opening and closing sliding plates; A material discharging and blocking unit, wherein the material discharging and blocking unit is respectively connected to the first opening and closing sliding plate and the second opening and closing sliding plate; and a driving control unit, wherein the driving control unit is connected to the control support plate and is respectively connected to the first opening and closing sliding plate and the second opening and closing sliding plate.

3. A powder mixing system for lime-soil roadbed filling construction with lime-mixed improved soil according to claim 2, characterized in that: The discharge blocking unit comprises: An inclined material guide plate 1, two sides of which are respectively fixedly connected to the two opening and closing sliding plates 2; And an inclined material guide plate 2, the two sides of which are respectively fixedly connected to the two opening and closing sliding plates 1, and the inclined material guide plate 2 is also slidably connected to the inclined material guide plate 1, wherein a material discharge port is provided between the inclined material guide plate 1 and the inclined material guide plate 2, and the material discharge port is located above the detection blade body 1 and the detection blade body 2.

4. A powder mixing system for lime-soil roadbed filling construction with lime-mixed improved soil according to claim 3, characterized in that: The drive control unit comprises: A telescopic cylinder, the telescopic cylinder is fixedly connected to the control support plate; A lifting slide, the lifting slide is slidably connected to the control support plate and fixedly connected to the output end of the telescopic cylinder, and a gravity detection controller is also fixedly installed on the lifting slide, and the gravity detection controller is electrically connected to the telescopic cylinder and the gravity detection part respectively; And a push-pull rod 1 and a push-pull rod 2, one end of the push-pull rod 1 and the push-pull rod 2 are both rotatably connected to the lifting slide plate, and the other ends of the push-pull rod 1 and the push-pull rod 2 are respectively rotatably connected to the opening and closing sliding plate 1 and the opening and closing sliding plate 2.

5. The powder mixing system for lime-soil roadbed filling construction with lime-mixed improved soil according to claim 4 is characterized in that: Also includes: Mashing supports, the number of which is two sets, the two sets of which are respectively located on both sides of the control support plate, and each set of which is fixedly mounted with a driving motor; A crushing crankshaft 1, wherein the crushing crankshaft 1 is rotatably connected to one set of the crushing supports and is fixedly connected to an output end of one of the drive motors, and a plurality of cranks 1 are provided on the crushing crankshaft 1; A second crushing crankshaft, wherein the second crushing crankshaft is rotatably connected to another set of the crushing supports and is fixedly connected to an output end of another drive motor, and a plurality of second cranks are arranged on the second crushing crankshaft; And a telescopic mashing assembly, the number of the telescopic mashing assembly is two sets, the two sets of the telescopic mashing assembly are respectively connected to the crank one and the crank two, and are respectively connected to the inclined material guide plate two and the inclined material guide plate one.

6. A powder mixing system for lime-soil roadbed filling construction with lime-mixed improved soil according to claim 5, characterized in that: The telescopic crushing assembly comprises: Connecting rods, the number of the connecting rods is multiple, and one end of the multiple connecting rods is rotatably connected to the crank 1 and crank 2 respectively; and a cross-shaped blade, wherein the number of the cross-shaped blades is plural, the multiple cross-shaped blades are rotatably connected to the other ends of the multiple connecting rods respectively, and the multiple cross-shaped blades are respectively inserted on the inclined material guide plate 1 and the inclined material guide plate 2, and are slidably connected to the inclined material guide plate 1 and the inclined material guide plate 2 respectively; The multiple cross-shaped blades on the first inclined material guide plate and the multiple cross-shaped blades on the second inclined material guide plate are distributed in an interval manner.

7. The powder mixing system for lime-mixed improved lime-soil roadbed filling construction according to any one of claims 1 to 6 is applied to the lime-mixed improved lime-soil roadbed filling construction process, characterized in that: The construction process specifically includes the following steps: S1. Original soil preparation stage: a. Separate the soil preparation, determine the amount of slag storage according to the production volume of each batch of ash soil, and pile up the slag in an orderly manner according to different slag discharge periods; b. Turn over and dry naturally, take temporary drainage and rain protection measures to ensure that the raw soil entering the factory can achieve the best natural drying effect to reduce the amount of ash, and dry naturally for seven days as a time period; c. Determination of moisture content before entering the factory. Before the raw soil enters the factory for production, the moisture content of the current batch of raw soil needs to be tested to guide the dosage of ash. The moisture content of the raw soil entering the factory is controlled below 30%; S2, lime soil processing stage in the factory: First, the original soil and quicklime are quantitatively added and then calcined. After the calcination is completed, the calcination and feeding are carried out in sequence, so that the crushed soil source enters the forced mixer through the conveyor belt for mixing, and finally the calcined soil source is mixed with the powder mixing system for the calcined soil roadbed filling construction, and then tested and shipped to the site for filling construction; S3, lime soil filling construction stage: The ash soil obtained in step S2 is spread on the road surface, and is rolled and cured. Finally, after the density and ash dosage are tested and meet the requirements, the next layer of construction is carried out.

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