CN116657620A - Method for backfilling fertilizer tank by using fluid-state curing regeneration mixture - Google Patents

Abstract

The application discloses a method for backfilling a fertilizer tank by using a fluid curing regeneration mixture, which comprises the following steps: preparing a fluid state curing mixture, cleaning sundries needing to be backfilled in a fertilizer groove, pouring the backfill fertilizer groove by using the fluid state curing mixture, pouring in layers, wherein the pouring height of each layer is not more than 2.0m, and after pouring, sprinkling water for maintenance, wherein the shortest construction interval of each layer is more than 12 hours. The application has high strength and fluidity suitable for pumping construction, not only has high construction speed, but also forms the ready-mixed fluid curing regeneration mixture with high strength, controllable quality, low cost and wide application range.

Description

A method of backfilling fertilizer tanks using fluid solidified recycled mixture

technical field

The invention relates to the technical field of construction engineering, in particular to the technology of backfilling fertilizer tanks with ready-mixed fluid solidified recycled mixture.

Background technique

With the vigorous development of urban construction, the construction land is becoming more and more tense, and it is imperative to maximize the use of the site; therefore, the distance between the structure and the foundation pit enclosure is getting closer and closer, and the fertilizer tank with the characteristics of "narrow, deep and long" Appears more and more frequently in engineering.

For the backfilling of this kind of fertilizer tank, if the backfilling operation is used, there will be great safety hazards in limited space operations, slow construction speed, and high construction costs; especially for deep foundation pits with replacement braces, the vertical and horizontal distances between the braces If it is difficult to pave, it is difficult for the tamping machine to play a role; if there is a rainy period, it will have an adverse impact on the construction period, construction quality, and safety management.

Therefore, in order to ensure the construction quality and safety, plain concrete is generally selected for backfilling the fertilizer tank.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a method for backfilling fertilizer tanks using fluidized solidified recycled mixture, which has high strength and fluidity suitable for pumping construction, and not only has fast construction speed, but also Moreover, the formed ready-mixed fluid solidified recycled mixture has high strength, controllable quality, low cost and wide application range.

The basic idea that the present invention adopts technical solution is:

A method of backfilling a fertilizer tank using a fluid solidified recycled mixture, the method comprising the following steps:

Configure fluid solidification mixture;

Clean up the debris that needs to be backfilled in the fertilizer tank, and use the fluid solidified mixture to pour the backfilled fertilizer tank;

Layered pouring, the pouring height of each layer is not greater than 2.0m, after the pouring is completed, it needs to be sprinkled for maintenance, and the minimum interval between the construction of each layer is more than 12h.

In a preferred embodiment of any of the above schemes, the debris that needs to be backfilled in the fertilizer tank is cleaned up, and the fluid solidified mixture is used to pour the backfilled fertilizer tank, including:

Use an appropriate amount of water to wet the hopper of the pump, the pump chamber and the part where the pipeline is in contact with the mixture, and pump after checking that there is no abnormality in the pipeline;

The pump sends the mixture continuously. When the supply of the mixture is insufficient or the operation is not normal, the pumping speed is slowed down. When the pumping is temporarily interrupted, the pump is used to pump and reciprocate every 5-10 minutes. -3 times.

In a preferred embodiment of any of the above schemes, layered pouring, the pouring height of each layer is not more than 2.0m, and watering is required after the pouring is completed; the shortest interval between each layer of construction is more than 12h, including:

When pouring the mixture, the pouring sequence adopts layered pouring, the height of the layered pouring is ≤2.0m, the end hose is moved evenly, the thickness of each layer is controlled at 30-40cm, and the piles are not poured;

The total thickness of each pouring shall be ≤2.0m. During the next pouring construction, the stubble shall be roughened and watered to keep it moist;

For multi-point pouring, the interval between pumping pouring points is ≤10 meters. After one pouring is completed, the pouring is continued in a circular manner. The construction interval of each layer needs to be more than 12 hours.

In a preferred embodiment of any of the above schemes, the fluid solidified mixture is prepared from raw materials in the following proportions: cement: fly ash: recycled fine aggregate: water = 8:5:65:22.

In a preferred embodiment of any of the above schemes, the standard strength of the fluid solidified recycled mixture is 1.1 MPa, and the standard density is 1.95 g/cm ³ .

In a preferred embodiment of any of the above schemes, the pump runs at a low speed when the pump is running, and the speed is 500-500r/min, and the pressure of the pump and the working conditions of each part are observed, and the delivery pressure is less than or equal to the maximum work of the main oil cylinder of the pump. 1/3 of the pressure.

In a preferred embodiment of any of the above schemes, the regenerated fine aggregate is 0-4.75mm regenerated fine aggregate of bricks and tiles, which is regenerated from construction waste through sorting, impurity removal, crushing and screening processes.

In a preferred embodiment of any of the above schemes, the condition monitoring system includes:

A data acquisition module, used to collect data on the physical quantity of the pump through the data acquisition module;

The processor is used to display the collected data through the display, and write the data into the created database, wherein the processor is electrically connected to the governor, so as to send the speed adjustment to the governor. instructions;

a server, connected to the processor, and used to input the data in the database into the database of the server;

The mobile client is used to communicate with the server, retrieve the required data from the server, and display the real-time status of the pump on the mobile client.

In a preferred embodiment of any of the above schemes, the governor includes a microcontroller, a register, a timer module, a thyristor trigger module and an AD conversion circuit, and the processor sends an instruction for speed adjustment to the governor After the pump is started, the discrete pump parameters are obtained through the AD conversion circuit, and then the information is transmitted to the register, and the data is sent to the microcontroller for calculation through the common data interface of the register, so as to obtain the The control amount of the pump is described and transmitted to the timer circuit through the data communication interface. After the time is matched, the thyristor trigger module is turned on immediately to realize the speed regulation of the pump.

In a preferred embodiment of any of the above schemes, the governor further includes:

The parameter correction module is used to communicate with the server through the mobile phone and transmit the correction report data to the processor according to the type of parameters to be corrected, as well as the corresponding actual value and measured value, so as to realize the parameter correction of the governor.

After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

Fluid solidified recycled mixture is a new type of foundation pit backfill mixed material made of recycled construction waste materials, cementitious material, curing agent and water through a mixer. It has fluidity, impermeability, shock resistance, and It has the characteristics of cracking, vibration-free, and convenient construction. After on-site pouring and curing, it has a certain strength after hardening. Its strength level can be prepared through experiments according to design and construction requirements, so as to achieve the effect of reducing costs and increasing efficiency.

According to the current backfilling requirements, it only takes 12 hours to reach the strength of the master for the next step of construction, which can ensure the continuous progress of backfilling, and at the same time ensure that the support in the foundation pit can be removed with backfilling, and the pre-mixed fluid solidified recycled mixture can be backfilled The working surface required for the foundation trench is small, multiple sections can be constructed at the same time, the construction speed is less, the process is less, and the construction period is short.

The fluidity of the ready-mixed fluid solidified recycled mixture can fill all the gaps in the narrow space and the special-shaped structure space. The ready-mixed fluid solidified recycled mixture has the characteristics of self-tightness, and there is no need to use large-scale compaction and rolling equipment during construction. , reducing the impact and damage of the construction on the structural layer, and the ready-mixed fluid solidified recycled mixture will not damage the waterproof layer when pouring, so it is not necessary to use the compact backfill method when backfilling the underground structure exterior wall of the backfill foundation groove Waterproof protection not only saves construction costs but also solves the problem that protection construction cannot be carried out in some small spaces. The solidified recycled mixture is evenly stirred and stable in quality. On-site pouring is less affected by site conditions and construction personnel factors. Batch ready-mixed fluid solidified recycled mixture materials are representative of sampling.

The fluid solidification recycled mixture uses the curing agent to fill and consolidate the soil particles. Therefore, the fluid solidified recycled mixture has impermeability, which can prevent groundwater from damaging the fluid solidified recycled mixture itself. It can be closely combined with the foundation structure to prevent surface water from infiltrating along the interface between the structure and the backfill.

The pre-mixed fluid solidified recycled mixture can be used to backfill the foundation tank, which can solve the problems of high soil requirements, small working surface, difficult tamping, unstable tamping quality, poor integration with the interface of the foundation structure, and inability to dry construction when using lime soil backfilling. Guarantee that there will be no problems such as subsidence after being exposed to water. The effect of backfilling in the foundation groove can reach the effect of plain concrete, but its cost is much lower than that of backfilling with concrete. At the same time, centralized mixing is used during construction. Dust pollution, green environmental protection.

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. Hereinafter, some specific embodiments of the present application will be described in detail with reference to the accompanying drawings in an exemplary rather than restrictive manner. The same reference numerals in the drawings indicate the same or similar components or parts, and those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

Fig. 1 is a schematic flow chart of the method for backfilling a fertilizer tank using a fluidized solidified recycled mixture according to the present invention.

Fig. 2 is a schematic flow chart of the method for backfilling the fertilizer tank with the fluidized solidified recycled mixture in the present invention to clean up the debris that needs to be backfilled in the fertilizer tank, and use the fluidized solidified mixture to pour the backfilled fertilizer tank.

Fig. 3 is the layered pouring of the method for backfilling the fertilizer tank using the fluidized solidified recycled mixture according to the present invention. The pouring height of each layer is not greater than 2.0m. After the pouring is completed, watering is required for maintenance. The shortest interval between each layer of construction is more than 12h.

Fig. 4 is a schematic view of the support structure of the method for backfilling the fertilizer tank using the fluidized solidified recycled mixture according to the present invention.

It should be noted that these drawings and text descriptions are not intended to limit the concept scope of the present invention in any way, but illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.

The following embodiments of the present application take the method of backfilling the fertilization tank with fluidized solidified recycled mixture as an example to illustrate the solution of the present application in detail, but this embodiment does not limit the protection scope of the present application.

As shown in Fig. 1, the present invention provides a kind of method that uses fluid solidification recycled mixture to carry out the method for backfilling fertilizer tank, described method comprises the following steps:

Step 11: Configure a fluid solidified mixture, which is prepared from raw materials with the following proportions: cement: fly ash: recycled fine aggregate: water = 8:5:65:22;

Step 12: Clean up the debris that needs to be backfilled in the fertilizer tank, and use the fluid solidification mixture to pour the backfilled fertilizer tank;

Step 13: Concrete in layers, the pouring height of each layer shall not be greater than 2.0m, after the pouring is completed, it needs to be sprinkled with water for maintenance, and the minimum interval between the construction of each layer is more than 12h.

In the method of backfilling the fertilizer tank with the fluidized solidified recycled mixture described in the embodiment of the present invention, according to the current backfilling requirements, it only takes 12 hours to reach the strength of the master for the next step of construction, which can ensure the continuity of backfilling At the same time, it can ensure that the support in the foundation pit can be removed as it is backfilled. The working surface required for backfilling the foundation groove with the pre-mixed fluid solidified recycled mixture is small, and multiple sections can be constructed at the same time. The construction speed is less and the process is short, and the construction period is short.

The fluidity of the ready-mixed fluid solidified recycled mixture can fill all the gaps in the narrow space and the special-shaped structure space. The ready-mixed fluid solidified recycled mixture has the characteristics of self-tightness, and there is no need to use large-scale compaction and rolling equipment during construction. , reducing the impact and damage of the construction on the structural layer, and the ready-mixed fluid solidified recycled mixture will not damage the waterproof layer when pouring, so it is not necessary to use the compact backfill method when backfilling the underground structure exterior wall of the backfill foundation groove Waterproof protection not only saves construction costs but also solves the problem that protection construction cannot be carried out in some small spaces. The solidified recycled mixture is evenly stirred and stable in quality. On-site pouring is less affected by site conditions and construction personnel factors. Batch ready-mixed fluid solidified recycled mixture materials are representative of sampling.

The fluid solidification recycled mixture uses the curing agent to fill and consolidate the soil particles. Therefore, the fluid solidified recycled mixture has impermeability, which can prevent groundwater from damaging the fluid solidified recycled mixture itself. It can be closely combined with the foundation structure to prevent surface water from infiltrating along the interface between the structure and the backfill.

The pre-mixed fluid solidified recycled mixture can be used to backfill the foundation tank, which can solve the problems of high soil requirements, small working surface, difficult tamping, unstable tamping quality, poor integration with the interface of the foundation structure, and inability to dry construction when using lime soil backfilling. Guarantee that there will be no problems such as subsidence after being exposed to water. The effect of backfilling in the foundation groove can reach the effect of plain concrete, but its cost is much lower than that of backfilling with concrete. At the same time, centralized mixing is used during construction. Dust pollution, green environmental protection.

Fluid solidified recycled mixture is consumed and utilized by turning recycled materials into high value-added technical methods of geotechnical engineering materials, which can effectively achieve the reduction, disposal and comprehensive utilization of construction waste in urban construction. At the same time, it has high value for improving the urban environment, saving resources, and improving economic benefits.

In the embodiment of the present invention, the standard strength of the fluid solidification recycled mixture is: 1.1MPa, and the standard density is (g/cm ³ ): 1.95g/cm ³ ; the uniformity, through the screening and quality of the recycled fine aggregate in the early stage Control, with a specific mixing process, the mixture has good uniformity; strength, according to design requirements and economic costs, the strength can be adjusted between 0.5 ~ 5Mpa. If there is an early strength requirement, the strength for the next step of construction can be achieved by adding admixtures for 12 hours. From economic considerations, the strength level of the fluid solidification recycled mixture should be controlled at 0.5-3.0Mpa; the impermeability, compared with natural soil, the fluid solidification recycled mixture has a greatly improved impermeability, and the permeability coefficient is comparable to that of silt, Loess and other natural soils are reduced by 2 levels; volume stability, fluid solidified recycled mixture usually does not shrink after wet curing at normal room temperature, and in the state of dehydration, the shrinkage tends to be stable after 30 days ; Long-term stability, according to the design requirements, the strength of the fluid solidified recycled mixture can continue to increase within 1 to 2 years, and the hardened body remains stable for a long time. In the underground filling environment with constant temperature and humidity, the long-term stability will be better; Slump: adjust the slump and fluidity according to the construction requirements. When backfilling the fertilizer tank, the slump is controlled within the range of 180±30mm, and pumping or chute construction can be used.

In the method for backfilling fertilizer tanks using fluid solidified recycled mixture described in the embodiment of the present invention, "fluid solidified recycled mixed material" is a kind of construction waste recycled material, adding cementitious material, curing agent and water to pass through The new foundation pit backfill mixed material mixed by the mixer has the characteristics of fluidity, impermeability, earthquake resistance, crack resistance, vibration-free, and convenient construction. After on-site pouring and maintenance, it has a certain strength after hardening. It can be formulated through experiments according to design and construction requirements, and it is also a new process for reducing costs and increasing efficiency. "Fluid solidified recycled mixture" has a wide range of uses and can be used in filling projects, including backfilling of foundation grooves of municipal pipe corridors, backfilling of municipal pipe network burial, backfilling of deep foundation pits of buildings, backfilling of narrow or special-shaped spaces, etc. In the filling project, it can be pumped or poured in the launder without vibrating and forming, which reduces the compaction process of traditional plain soil and lime soil backfill, especially in the filling project of narrow space, it has irreplaceable technical advantages . The recycled construction waste materials used in the "fluid solidified recycled mixture" are screened out through a specific process in the process of resource recycling of construction waste, with a sand content of more than 90% and a sand equivalent of more than 65%. The consumption and utilization of recycled materials into high value-added technology of geotechnical engineering materials can effectively achieve the purpose of reducing and disposing of construction waste in urban construction and comprehensive utilization of construction waste recycling products. Urban environment, saving resources and improving economic benefits have higher value. The material plan is shown in Table 1:

serial number material type Quantity (m ³ ) 1 Fluid curing mixture 4500

The performance of the finished curing agent should meet the following requirements:

As shown in Table 2, the curing agent physical index

serial number index Require(%) 1 Fineness (residue of 80μm square hole sieve) ≤10 2 moisture content ≤1

Curing agent process index requirements, as shown in Table 3:

Note: When the time from stirring to pouring during construction does not exceed 1 hour, there is no requirement for the fluidity of the clean slurry.

Curing agent mixing water requirements, as shown in Table 4:

As shown in Figure 2, in the embodiment of the present invention, the above step 12 may include:

Step 121: Use an appropriate amount of water to moisten the hopper of the pump, the pump chamber, and the parts where the pipeline is in contact with the mixture, and perform pumping after checking that there is no abnormality in the pipeline;

Step 122: When the pump is running, run at a low speed, the speed is 500-500r/min, and observe the pressure of the pump and the working conditions of each part. The delivery pressure is ≤ 1/3 of the maximum working pressure of the main cylinder of the pump;

Step 123: Pump the mixture continuously. When the supply of mixture is insufficient or the operation is not normal, slow down the pumping speed. When the pumping is temporarily interrupted, use the pump to pump every 5-10 minutes Push back and forth 2-3 times.

As shown in Figure 4, in the embodiment of the present invention, the above step 12 may include:

Step 124: When pouring the mixture, the pouring sequence is layered pouring, the layered pouring height is ≤ 2.0m, the end hose is moved evenly, the thickness of each layer is controlled at 30-40cm, and the piles are not poured;

Step 125: The total thickness of each pouring is ≤ 2.0m, and during the next pouring construction, roughen the stubble part and water it to make it moist;

Step 126: Multi-point pouring, the interval between pumping pouring points is ≤10 meters. After one pouring is completed, continue to pour in a cycle. The construction interval of each layer needs to be more than 12 hours. Set a backfill height mark every 2m horizontally. For the bracing structure, when backfilling to a certain distance from the bottom of the bracing, stop pouring, and remove the bracing. After the bracing is removed, carry out waterproof construction at this node, and then continue to pour the fluid solidified soil mixture.

In the method for backfilling fertilizer tanks using the fluid solidified recycled mixture described in the embodiment of the present invention, the fluid solidified recycled mixture has good construction convenience, especially for filling projects in narrow spaces, it can be used according to construction requirements , adjust the slump and fluidity, use pumping or chute construction, and generally do not need to vibrate during pouring. Fluid curing recycled mixture has the following basic characteristics:

Design ratio: cement: fly ash: recycled fine aggregate: water = 8:5:65:22, standard strength: 1.1MPa, standard density (g/cm ³ ): 1.95g/cm ³ , uniformity: pass Pre-screening and quality control of recycled fine aggregate, with specific mixing process, the mixture has good uniformity; strength, according to design requirements and economic cost, the strength can be adjusted between 0.5-5Mpa, with early strength requirements , the strength of the next step of construction can be achieved by adding admixtures for 12 hours. From economic considerations, the strength level of the fluid solidified recycled mixture should be controlled at 0.5-3.0Mpa; impermeability, compared with natural soil, the fluid state The impermeability of the cured recycled mixture is greatly improved, and the permeability coefficient can be reduced by 2 orders of magnitude compared with natural soils such as silt and loess; the volume stability, the fluid cured recycled mixture is usually not cured after wet curing at normal room temperature. Shrinkage occurs, and in the state of dehydration, the shrinkage tends to be stable after 30 days; for long-term stability, according to the design requirements, the strength of the fluid solidified recycled mixture can continue to increase within 1 to 2 years, and the hardened body remains stable for a long time. In the underground filling environment with constant temperature and humidity, the long-term stability will be better; the slump, according to the construction requirements, adjust the slump and fluidity, when the fertilizer tank is backfilled, the slump is controlled within the range of 180±30mm, which can Construction by pumping or chute.

Precautions for fixed pump connection pump pipe transportation When using a fixed pump connection pump pipe to transport the mixture, the laying of the pump pipe should pay attention to the following requirements:

①The piping route should be as short as possible, using as few bends and hoses as possible, and avoid using too large elbows. No more than 180% of the active hose at the end of the pipe;

② There should be a certain length of horizontal pipe at the outlet of the pump, and then connected to the elbow;

③The pipeline layout should make the pumping direction opposite to the pouring direction of the mixture, so that it is easy to remove the pipe section during the pouring process without adding pipe sections;

④ When the pump truck lays pipes and transports the mixture downwards, if the inclination is 40 to 70, a horizontal pipe with a length equivalent to 5H (H is the drop) should be installed at the lower end of the downhill pipe; The upper end of the inclined pipe is provided with an exhaust piston for deflation;

⑤ When pumping the mixture into the mold, the end hose should be moved evenly frequently to prevent the pipe from bursting due to the accumulation of the mixture and the increase in the pressure-feeding resistance.

⑥ When the mixture is poured to the final stage, the measures of "stopping the pump in sections" should be taken for the pump truck. When the pumping is about to end, the required amount of the mixture should be calculated so as to accurately determine the mixing quantity and avoid too much remaining mixture;

⑦After pumping the mixture, the mixture pump and pump tube should be cleaned in time. After the pump tubes are dismantled, they should be sorted and stacked according to different specifications.

Precautions for Construction in Rainy Season Construction in rainy season should do the following:

(1) The means of transport should have rainproof and anti-skid measures;

(2) The pouring surface should have rainproof measures and an impermeable covering material. When pouring in light rainy weather, the following measures should be taken:

① Properly reduce the mixing water consumption of the mixture and the slump of the mixture at the machine outlet, and appropriately reduce the water-binder ratio of the mixture if necessary;

② Strengthen the drainage in the tank and prevent the surrounding rainwater from flowing into the tank;

③ Do a good job in the protection of the newly poured mixture surface, especially the joints.

In case of sudden heavy rain, the following measures should be taken:

① During the pouring process, in case of heavy rain or rainstorm, the feeding should be stopped immediately, and the construction joints should be reserved. The mixed material that has entered the tank should be densely packed and then covered to prevent the rainwater from directly washing the mixed material;

②After the rain, the accumulated water in the tank must be removed first, and the parts washed by the rain should be treated immediately. If the mixture can be reshaped, the joint mixture should be added and then poured. Generally, the mixture has already set in the initial stage. Yes, if the surface is poor, it is necessary to chisel and use the high-grade No. 1 mixture.

On-site rain protection and drainage measures:

① Prepare enough materials and equipment on the construction site, such as straw bags, square logs, steel wire ropes, high-power pumping machines, etc.;

② Guarantee a certain self-generating capacity to ensure the waterproof and drainage needs in case of sudden power failure in the rainy season, and take effective measures for lightning protection devices and leakage prevention;

③ All electromechanical equipment on site should be set up in advance with rainproof grids (covers), and special personnel should be assigned to check frequently during the rainy season. Check the zero-connection and grounding protection device of the electromechanical equipment. It must be checked after each rain to ensure the normal operation of the electromechanical equipment.

Construction points of mixture in rainy season:

① You can first contact the meteorological department to make a short-term weather forecast. Before pouring, you should know the weather forecast in time, and try to use sunny days for construction. If it encounters rainy weather during pouring, you should immediately take measures to cover it with plastic sheets to prevent the newly poured mixture from being washed by rain. If the project must be poured with mixture due to work rush, it must be covered by scaffolding;

② During the construction of the mixture, it is usually required to control the slump of the mixture to meet the construction requirements during the rainy season. Under normal circumstances, it is strictly forbidden to pour the mixture during heavy rain;

③When the mixture delivered by the mixture mixing pump has not reached the initial setting, if it rains, it should be covered with plastic cloth in time to prevent rain.

Earthwork backfill construction should be carried out during the day, and if it is necessary to carry out earthwork backfill construction at night, it should be approved by the construction and supervision units. There should be sufficient lighting facilities for earthwork backfilling at night, and obvious signs should be set up in dangerous areas.

The person in charge of project technical quality, construction workers, quality personnel, civil engineering professional supervision engineers, and side station supervisors should all be present and sign on the side station records. Earthwork backfilling construction should be carried out in strict accordance with the "Earthwork Backfilling Construction Plan", and the filling soil material, layered virtual paving thickness, moisture content, compaction coefficient, and number of tamping times must meet relevant requirements.

Before backfilling, carry out a compaction test on the backfill soil to determine the maximum dry density and optimal water content, and the water content is 10%. Before filling, check whether the water content is within the control range. If the water content is too high, measures such as loosening, drying, and evenly mixing dry sand can be used; if the water content of the backfill is low, pre-drying, wetting, etc. can be used. measure. After treatment, it must pass the inspection before backfilling.

In the method for backfilling fertilizer tanks using fluidized solidified recycled mixture according to the embodiment of the present invention, the temperature information is collected by a temperature data acquisition module, wherein, when the temperature data acquisition module is working, first, it is initialized , first set the data line to high level 1, after a short delay, pull the data line to low level 0, delay 750μs, then pull the data line to high level 1, after the delay, if the data The measurement module can read the low level 0 on the data line, and after a delay of at least 480μs, pull it back to level 1 through the data line. In each data measurement module, the data measurement module only corresponds to one temperature sensor. The measurement module sends the temperature conversion command to start the temperature sensor, the temperature sensor starts the temperature conversion, and the data measurement module reads the temperature data from the temperature sensor. After a period of delay, the data measurement module first sends the initialization command and skips the ROM command , and then the data measurement module sends a read temporary register to the temperature sensor, and the data measurement module command can obtain the temperature data from the temperature sensor. Brick and tile recycled fine aggregate of 0-4.75mm produced by technological regeneration.

In an embodiment of the present invention, the condition monitoring system includes:

A data acquisition module, used to collect data on the physical quantity of the pump through the data acquisition module;

The processor is used to display the collected data through the display, and write the data into the created database, wherein the processor is electrically connected to the governor, so as to send the speed adjustment to the governor. instructions;

a server, connected to the processor, and used to input the data in the database into the database of the server;

The mobile client is used to communicate with the server, retrieve the required data from the server, and display the real-time status of the pump on the mobile client, so that the working status of the pump can be grasped in real time, Therefore, it is convenient to adjust the pump machine.

In the embodiment of the present invention, the governor includes a microcontroller, a register, a timer module, a thyristor trigger module and an AD conversion circuit, the processor sends an instruction for speed adjustment to the governor, and the pump After the machine is started, the discretized pump machine parameters are obtained through the AD conversion circuit, and then the information is transmitted to the register, and the data is sent to the microcontroller for calculation through the common data interface of the register, so as to obtain the pump machine parameters. The control quantity is transmitted to the timer circuit through the data communication interface, and the thyristor trigger module is turned on immediately after the time is matched, so as to realize the speed regulation of the pump.

In an embodiment of the present invention, the governor further includes:

The parameter correction module is used to communicate with the server through the mobile phone and transmit the correction report data to the processor according to the type of parameters to be corrected, as well as the corresponding actual value and measured value, so as to realize the parameter correction of the governor.

The function of the governor is to realize the regulation of the pump by controlling the speed of the pump. The governor includes micro-controller, register, timer module, thyristor trigger module and AD conversion circuit and other components. After the processor sends a speed adjustment command to the governor and the pump starts, the AD conversion circuit will obtain the parameters of the pump, discretize these parameters, and then transmit them to the register. The register is a general data interface, which can send data to the microcontroller for calculation and obtain the control quantity of the pump.

In order to control the speed of the pump, the governor uses a timer module to monitor the matching of time. When the pump reaches the preset control amount, the timer module will count according to the set time. When the time reaches the matching requirement, the thyristor trigger module will be turned on immediately to realize the speed regulation of the pump. During the whole process, the governor can also correct the parameters through the parameter correction module, so that the governor has better stability and accuracy.

Through the monitoring and analysis of the above reference factors, a control quantity suitable for the operation of the pump can be calculated, which is used to calculate the control quantity of the pump. The calculation formula is:

Control quantity = K _p * (target speed - current speed) + K _i * (target speed - previous speed) + K _d * (target speed - initial speed);

Among them, K _p , K _i and K _d are proportional, integral and differential constants respectively, the target speed is the expected pump speed, the current speed is the actual measured pump speed, and the previous speed is the measurement at the previous time As a result, the initial speed is the speed at which the pump is started.

In order to control the speed of the pump, the microcontroller in the governor can calculate the obtained speed parameters and transmit the calculation results to the timer module. When the time matches, the thyristor trigger module will be turned on and output a corresponding control signal to the pump. At the same time, the AD conversion circuit can monitor the current and voltage of the pump, and feed this information back to the microcontroller for further control and optimization. By complicating the control quantities and incorporating what the governor includes, more precise and stable control of pump speed and operation, as well as more sensitive current and voltage monitoring can be achieved.

In the pump control system, the AD conversion circuit is usually used to collect and convert analog signals such as current and voltage, so as to realize the monitoring and control of the working state of the pump.

In the AD conversion circuit, the sample and hold circuit, the operational amplifier circuit and the analog-to-digital conversion circuit are three important components. Among them, the sample and hold circuit is used to convert the input analog signal into the voltage signal on the capacitor, which has high precision and stability; the operational amplifier circuit amplifies and filters the voltage signal output by the sample and hold circuit, so that the voltage signal has better The transmission performance; the analog-to-digital conversion circuit converts the amplified voltage signal into a digital signal for storage and processing.

Therefore, the sample and hold circuit needs to accurately control the charging and discharging time of the capacitor through a control device to ensure the high precision and stability of the converted voltage signal. The voltage conversion formula of the sample and hold circuit is:

Among them, V(t) represents the voltage on the capacitor at time t, C represents the capacitance value, and i(x) represents the current.

Amplify and filter the voltage signal converted by the previous sample and hold circuit. Operational amplifier circuits mainly include inverting amplifiers or non-inverting amplifier circuits. Both of these circuits require the use of resistors for feedback control and consume a large amount of power.

Convert the previously collected and amplified analog voltage signal into a digital signal for storage and processing. The analog-to-digital conversion circuit includes sample quantization, sampling control and byte stream output, etc., which can ensure the accuracy and efficiency of the digital output signal. Among them , the digital output formula of the analog-to-digital converter is:

Among them, V _analog represents the analog voltage signal, V _ref represents the reference voltage, n represents the number of bits of the AD converter, and V _dig represents the converted digital signal.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present application. scope.

Claims (10)

1. A method of backfilling a fertilizer slot with a fluidized bed curing regeneration mixture, the method comprising the steps of:

preparing a fluid curing mixture;

cleaning sundries needing to fall back in the backfill fertilizer groove, and pouring the backfill fertilizer groove by using a fluid curing mixture;

and pouring in layers, wherein the pouring height of each layer is not more than 2.0m, and after pouring is completed, water is sprayed for maintenance, and the shortest construction interval of each layer is more than 12 h.

2. The method for backfilling a fertilizer tank with a fluid curing and regenerating mixture according to claim 1, wherein the method for cleaning the impurities to be backfilled and the method for pouring the backfilled fertilizer tank with the fluid curing mixture comprises the steps of:

wetting the parts of the hopper, the pump chamber and the pipeline of the pump, which are contacted with the mixture, with a proper amount of water, and pumping after no abnormality occurs in a check pipeline;

the pumping of the mixture is continuously carried out, when the mixture is not supplied enough or the mixture is not normally operated, the pumping speed is slowed down, and when the pumping temporarily stops feeding, the pumping is utilized to carry out pumping and reciprocating pushing for 2-3 times every 5-10 min.

3. The method for backfilling a fertilizer tank by using the fluid curing regeneration mixture according to claim 2, wherein the pouring is performed in layers, the pouring height of each layer is not more than 2.0m, and water spraying maintenance is needed after the pouring is completed; each layer of construction is performed for more than 12 hours at the shortest interval, and comprises the following steps:

when the mixture is poured, layered pouring is adopted in the pouring sequence, the layered pouring height is less than or equal to 2.0m, the end hose is uniformly moved, the thickness of each layer of cloth is controlled to be 30-40cm, and the mixture is not poured in a pile;

the total thickness of each casting is less than or equal to 2.0m, and the next casting construction is performed with napping treatment on the stubble parts and watering and wetting;

and (3) multipoint pouring, wherein the intervals of pumping pouring points are less than or equal to 10 meters, and after one-time pouring is finished, the circulating pouring is continued, and the construction interval time of each layer is more than 12 hours.

4. The method for backfilling a fertilizer tank using a fluid curing regeneration mixture according to claim 3, wherein the fluid curing mixture is prepared from the following raw materials in proportion: and (3) cement: fly ash: regenerating fine aggregate: water=8:5:65:22.

5. The method of backfilling a fertilizer tank with a fluid cure regeneration mixture of claim 4, wherein the fluid cure regeneration mixture has a standard strength of: 1.1MPa, standard density: 1.95g/cm ³ 。

6. The method for backfilling a fertilizer tank by using a fluid curing regeneration mixture according to claim 5, wherein the pump is operated at a low speed, the rotating speed is 500-500r/min, the pressure of the pump and the working condition of each part are monitored in real time through a state monitoring system, and the conveying pressure is less than or equal to 1/3 of the maximum working pressure of a main cylinder of the pump.

7. The method for backfilling a fertilizer tank by using a fluid curing regeneration mixture according to claim 6, wherein the regeneration fine aggregate is a tile regeneration fine aggregate with the size of 0-4.75mm which is formed by regenerating and processing construction waste through the processes of sorting, impurity removal, crushing and screening.

8. The method of backfilling a fertilizer tank with a fluidized bed curing regeneration mixture of claim 7, wherein the condition monitoring system comprises:

the data acquisition module is used for acquiring data of the physical quantity of the pump through the data acquisition module;

the processor is used for displaying the acquired data through the display and writing the data into the created database, wherein the processor is electrically connected with the speed regulator so as to realize the purpose of sending a speed regulation instruction to the speed regulator;

the server is connected with the processor and is used for inputting data in the database into the database of the server;

and the mobile client is used for communicating with the server, retrieving the needed data from the server and displaying the real-time state of the pump on the mobile client.

9. The method for backfilling a fertilizer tank by using a fluid curing regeneration mixture according to claim 8, wherein the speed regulator comprises a microcontroller, a register, a timer module, a thyristor trigger module and an AD conversion circuit, the processor sends a speed regulation instruction to the speed regulator, after the pump is started, the processor obtains discretized pump parameters through the AD conversion circuit, then transmits information to the register, and sends data to the microcontroller for calculation through a data interface common to the register, thereby obtaining the control quantity of the pump, and transmits the control quantity to the timer circuit through the data communication interface, and the thyristor trigger module is turned on immediately after time matching to realize speed regulation of the pump.

10. The method of backfilling a fertilizer slot using a fluidized bed curing regeneration mixture as set forth in claim 9, wherein the governor further comprises:

and the parameter correction module is used for communicating with the server through the mobile phone according to the type of the parameter to be corrected, the corresponding actual value and the corresponding measured value, and transmitting the corrected report data to the processor so as to realize the parameter correction of the speed regulator.