Field mixing construction method for Taylor bio-enzyme modified pavement

Abstract

The invention discloses a field mixing construction method for a Taylor bio-enzyme modified pavement. The field mixing construction method comprises the following steps: S1, preparing a working surface; s2, material preparation: preparing clayey soil, quick lime, Thalamin and a water source; s3, preparing equipment; s4, determining the optimal moisture content: determining the optimal moisture content of the batch of clayey soil through a test; s5, raw material mixing: mixing the quick lime with the clayey soil, and then carrying out material covering to obtain a raw material; s6, clinker preparation: adding the raw material into an aqueous solution dissolved with Thaldranase according to the optimal water content in the step s4, stirring, and then carrying out material covering to obtain the clinker; s7, paving, rolling and forming; s8, surface sealing, wherein dry powder cement is applied to the compacted and polished working face; and S9, road nails are sprayed, construction is completed, and the technical problems that in the prior art, a road mixing method has high requirements for the construction environment, and the required time interval from mixing to rolling is very short are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of road construction, and in particular relates to a field-mixing construction method for a Tairan bio-enzyme modified road surface. Background Art

[0002] Tairan Bio-enzyme construction usually adopts road-mixing method. Road-mixing method is a very efficient construction method with fast speed and low operating cost. It is the preferred method, but it often requires a suitable construction environment and good construction equipment. The conditions for road-mixing method are often not available during on-site construction. In addition, road-mixing method uses cement as an energy agent. Because cement has a limited initial setting time, the mixed clinker must be spread and rolled immediately, so the front and rear field equipment must be arranged during construction. However, the construction speed of the front and rear fields is not easy to match, which often causes the front field equipment to stop working and wait for materials (from the start of mixing to the completion of rolling within 5 hours). Therefore, how to solve the time difference between mixing and construction and the progress coordination of the front and rear fields is a difficult problem that technicians in this field have been thinking about. Summary of the invention

[0003] The purpose of the present invention is to provide a method for field mixing of Tairan bio-enzyme modified pavement, so as to solve the technical problems that the road mixing method in the above-mentioned prior art has high requirements on the construction environment and a very short interval between mixing and rolling.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A method for site mixing construction of Tairan bio-enzyme modified pavement comprises the following steps: S1. Work surface preparation: meet the corresponding requirements of the standards according to the highway grade; S2. Material preparation: prepare clay soil, quicklime, terranase and water source; S3. Equipment preparation: prepare large excavators, loaders, pumping equipment, dump trucks, graders and rollers; S4. Determination of optimum moisture content: Determine the optimum moisture content of the batch of clay soil through experiments; S5, raw material mixing: mixing quicklime and clay, and then steaming to obtain raw material; S6, clinker production: adding the aqueous solution in which the tyranase is dissolved to the raw material according to the optimal water content in step s4, stirring, and then stewing the raw material to obtain clinker; S7, paving and rolling: transport the clinker to the working surface by dump truck for paving and compaction; S8, Surface sealing: Spread dry cement on the compacted and polished working surface; S9: Spray road studs to complete the construction.

[0005] In the field-mixing construction method of Tairan bio-enzyme modified pavement of the present invention, the working surface standard in step s1 is: for general roads, it reaches 93 surface requirements; for national and provincial trunk roads, it reaches 95 surface requirements; for expressways, it reaches 96 surface requirements.

[0006] In a method for field mixing construction of a Tairan bio-enzyme modified pavement of the present invention, the tax content measurement in step s4 comprises the following steps: A1. Mixing clay and quicklime in a ratio of 20:1 to obtain a mixture; A2, slowly atomizing and spraying water on the mixture in step A1 and uniformly stirring the mixture, while measuring the amount of water sprayed; A3. When the mixture can be kneaded into a ball by hand after spraying water, and can be broken up by free fall from a certain height, it is the best. Count the amount of water sprayed at this time; A4. Repeat the above steps A1-A3 to obtain multiple optimal water spraying values, average the multiple water spraying values ​​to obtain the optimal water content value, and calculate the water content; A5. Apply the moisture content to the production of the first batch of clinker. During the production process, pay attention to whether the moisture content is appropriate. If not, make fine adjustments to the content.

[0007] In the field-mixing construction method of the Tairan bio-enzyme modified pavement of the present invention, the weight of the clay in step A1 is 10 kg, and the weight of the quicklime is 0.5 kg.

[0008] In the field-mixing construction method of the Tairan bio-enzyme modified pavement of the present invention, the certain height in step A3 is chest height, i.e., 1.3-1.5 meters.

[0009] The present invention provides a method for on-site mixing of Tairan bio-enzyme modified pavement. In the step s5, the mixture is mixed at a ratio of one ton of quicklime to treat 10 cubic meters of clay soil, and the mixture is kept sterile for more than 12 hours.

[0010] The present invention provides a method for field mixing construction of a Tairan bio-enzyme modified pavement, wherein each liter of Tairan enzyme in step S6 processes 15 to 18 m³ of raw material.

[0011] In the field-mixing construction method of a Tairan bio-enzyme modified pavement of the present invention, the Tairan enzyme solution in step s6 is sprayed during two mixing processes.

[0012] In the field-mixing construction method of Tairan bio-enzyme modified pavement of the present invention, in step s6, the raw materials mixed multiple times are concentrated into a large pile of clinker to obtain clinker.

[0013] In the field-mixing construction method of the Tairan bio-enzyme modified pavement of the present invention, after the cement is spread in step S8, a roller is used for static pressure finishing.

[0014] The beneficial effects of the present invention are as follows: a method for the construction of a field-mixed road surface modified by a tairan bio-enzyme is proposed, quicklime is used as an energy agent, and sufficient time is required for the material to be simmered, so that the material has no time limit, and the front and rear field operations can be divided into two sections, that is, the front field equipment can be arranged only after all the clinkers are mixed or enough clinkers have been mixed in the back field. In this way, the equipment in the front and rear fields does not have to wait for work, the equipment efficiency is very high, the construction is naturally faster, and the operation efficiency is high; by measuring the optimal moisture content of different clay soils, the construction quality is improved, and the tairan enzyme can be prevented from volatilizing by spreading cement dry powder, thereby improving the hardness of the road surface. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention is clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0016] A method for field mixing construction of Tairan bio-enzyme modified pavement, the first step: preparation work: 1. Preparation of working surface: For general roads, the requirement of 93 faces is met; National and provincial trunk lines must meet the 95-surface requirement; Expressway, meeting 96 requirements; When required by design documents, follow the design.

[0017] 2. Raw materials: clay soil; quicklime; Tyranase; water; Cement (a small amount is used to seal the surface, about 100-150 m2 per bag).

[0018] 3. Equipment: Backfield equipment: Large excavators; Loader; Large water containers, two; Submersible pumps (with power supply, switch, 30-meter water pipe, nozzle), four; according to the dryness and wetness of the soil, select the flow rate of 1.5m³ / hour, 2.5m³ / hour, 3m³ / hour, 4.5m³ / hour...etc.; One transport dump truck.

[0019] Front field equipment: Small excavator, motor grader, road roller. One each.

[0020] 4. Operation data preparation: The most important indicator data of the field mixing method, which also needs to be controlled by operation, is the "optimal moisture content", which can be obtained by conducting a benchmark test. Here is a simple method for finding the "optimal moisture content".

[0021] Weigh 10 kg of representative soil and mix it with 500 g of quicklime to form a mixture. Then spray water slowly and evenly on the mixture while stirring evenly and accurately measuring the amount of water sprayed. The best water content of the mixture is when it can be kneaded into a ball by hand and can be broken apart by free fall at chest height. Count the amount of water sprayed.

[0022] Repeat this test many times, the best water spray volume is a range, and the average value is calculated to obtain an approximate "optimal moisture content test value" that fully meets the construction requirements. Multiply this test value by 100 to 120 times to get the amount of water needed to be sprayed per cubic meter of mixed material. Please note that due to the representative error of the soil, when spraying the first pile of mixed material, it is necessary to monitor it from time to time and correct the possible data errors.

[0023] Step 2: From raw materials to raw materials: Mix the soil and quicklime at a ratio of 1 ton of quicklime to 10 cubic meters of loose soil. Steep the mixture for more than 12 hours. Stir evenly and then stew for another 12 hours. This completes the process from raw materials to raw materials.

[0024] Step 3: From raw materials to cooked materials: We process 100-120m³ each time according to the processing capacity of large excavators. We dig 100-120m³ of raw materials after the materials are stuffed. According to the test data, we calculate the total amount of water required for the pile, and use this total amount of water as the solvent. Then, we calculate the total amount of tyranase required for the pile, based on the fact that each liter of tyranase can process 15-18m³ of raw materials, and use this total amount of tyranase as the solute. Evenly mix the tyranase solution.

[0025] The excavator starts to move the pile and stir the mixture. At the same time, a submersible pump is used to coordinate with the excavator to spray the Tairan enzyme solution on the pile. The spraying speed should be such that the excavator stirs the mixture twice or more.

[0026] Stir twice more. When finished, pile up the stuffing.

[0027] Repeat the above operation and pile the mixed materials into a large pile for stewing. The mixture that has been stewed for more than 24 hours is called clinker. This is until all the clinker mixing is completed.

[0028] Usually, the backyard gradually becomes full. Arrange a dump truck to transport the clinker to the frontyard and unload it at an appropriate distance, keeping the frontyard in a small pile until all the clinker is mixed.

[0029] Step 4: Spreading and rolling: First, use an excavator to level the mixture. Pay attention to controlling the paving width according to the design, and make sure the edges and corners are full and even.

[0030] The grader is used for precision leveling. Width, elevation, flatness, longitudinal slope, transverse slope, curves and other indicators are controlled according to the design.

[0031] The roller performs static compaction and works in conjunction with the motor grader to perform fine leveling again.

[0032] The road roller compacts the soil.

[0033] Step 5: Surface sealing: To prevent the early volatilization of tyranase, after the roller completes the vibration rolling and the initial finishing, spread dry cement on the working surface. Requirements: 100% coverage and the thinner the better, use a broom to assist if necessary to meet the requirements.

[0034] The cement spreading is completed and the roller is used to compact the cement.

[0035] Step 6: Spray road studs: See Road Spike Operation.

[0036] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0038] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A Tairan bio-enzyme modified pavement field mixing construction method, characterized in that: The following steps are involved: S1. Work surface preparation: meet the corresponding requirements of the standards according to the highway grade; S2. Material preparation: prepare clay soil, quicklime, terranase and water source; S3. Equipment preparation: prepare large excavators, loaders, pumping equipment, dump trucks, graders and rollers; S4. Determination of optimum moisture content: Determine the optimum moisture content of the batch of clay soil through experiments; S5, raw material mixing: mixing quicklime and clay, and then steaming to obtain raw material; S6, clinker production: adding the aqueous solution in which the tyranase is dissolved to the raw material according to the optimal water content in step s4, stirring, and then stewing the raw material to obtain clinker; S7, paving and rolling: transport the clinker to the working surface by dump truck for paving and compaction; S8, Surface sealing: Spread dry cement on the compacted and polished working surface; S9: Spray road studs to complete the construction.

2. The method for field mixing of a Tairan bio-enzyme modified pavement according to claim 1, characterized in that: The working surface standard in step s1 is: for general roads, it meets the 93-surface requirement; for national and provincial trunk roads, it meets the 95-surface requirement; for expressways, it meets the 96-surface requirement.

3. The method for field mixing of Tairan bio-enzyme modified pavement according to claim 1, characterized in that: The tax-inclusive amount measurement in step s4 comprises the following steps: A1. Mixing clay and quicklime in a ratio of 20:1 to obtain a mixture; A2, slowly atomizing and spraying water on the mixture in step A1 and uniformly stirring the mixture, while measuring the amount of water sprayed; A3. When the mixture can be kneaded into a ball by hand after spraying water, and can be broken up by free fall from a certain height, it is the best. Count the amount of water sprayed at this time; A4. Repeat the above steps A1-A3 to obtain multiple optimal water spraying values, average the multiple water spraying values ​​to obtain the optimal water content value, and calculate the water content; A5. Apply the moisture content to the production of the first batch of clinker. During the production process, pay attention to whether the moisture content is appropriate. If not, make fine adjustments to the content.

4. The method for field mixing of Tairan bio-enzyme modified pavement according to claim 3, characterized in that: The weight of the clay in step A1 is 10 kg, and the weight of the quicklime is 0.5 kg.

5. The method for field mixing of Tairan bio-enzyme modified pavement according to claim 3, characterized in that: The certain height in step A3 is chest height, that is, 1.3-1.5 meters.

6. The method for field mixing of Tairan bio-enzyme modified pavement according to claim 1, characterized in that: In the step s5, the mixture is mixed at a ratio of 1 ton of quicklime to 10 cubic meters of clay soil, and the mixture is kept for more than 12 hours.

7. The method for field mixing of Tairan bio-enzyme modified pavement according to claim 1, characterized in that: In step S6, each liter of tyranase is used to treat 15 to 18 m³ of raw material.

8. The method for field mixing of Tairan bio-enzyme modified pavement according to claim 7, characterized in that: In step s6, the Tairan enzyme solution is sprayed during two stirring processes.

9. The method for field mixing of Tairan bio-enzyme modified pavement according to claim 8, characterized in that: In the step s6, the raw materials that have been mixed for multiple times are gathered into a large pile to obtain clinker.

10. The method for field mixing of Tairan bio-enzyme modified pavement according to claim 1, characterized in that: In step s8, after the cement is spread, a roller is used to perform static compaction.