Premixed flow state solidified soil construction method

Abstract

The invention belongs to the field of premixed flow-state solidified soil, and particularly relates to a premixed flow-state solidified soil construction method which comprises the steps of basement outer wall waterproof construction, soil material and curing agent selection, premixed flow-state solidified soil mixing, layered backfilling and maintenance. The basement outer wall waterproof construction comprises the steps of wall face repairing, screw hole blocking, waterproof coating brushing, waterproof roll laying, brick wall protection layer building and soil backfilling. The solidified soil filling operation comprises preparation before construction, filling mode selection, time limitation, winter construction requirements, layered filling, filling sequence, large-area foundation cushion layer construction, delivery pump delivery construction matters needing attention, vibration requirements, forbidden matters in the pouring process and severe weather countermeasures; the maintenance comprises watering or covering for moisturizing, and the maintenance time of the top solidified soil is not less than 7 days; according to the method, through accurate waterproof construction, soil material and curing agent optimization, accurate solidified soil mixing, layered backfilling and curing, the quality, safety and efficiency of solidified soil construction are ensured.

Description

Technical Field

[0001] The invention relates to the field of premixed fluidized solidified soil, and in particular to a construction method of premixed fluidized solidified soil. Background Art

[0002] Premixed fluidized solidified soil is equivalent to "concrete" in a broad sense. Concrete is a cement-based cementitious material that solidifies coarse-grained soil (aggregates such as sand and gravel), while premixed fluidized solidified soil is a high-efficiency rock and soil consolidating agent that solidifies fine-grained soil (muddy soil, silt, clay, weathered rock particles, etc.). According to the construction design requirements, solidified soil of different strength grades can be designed; it can effectively fill the gap of ultra-low strength of premixed concrete, has stronger fluidity than concrete, does not require vibration during construction, and can effectively reduce costs and quickly complete construction;

[0003] In the prior art, a patent document with announcement number: CN115401790A discloses a construction method for premixed fluidized solidified soil, which specifically includes the following steps: S1: soil material selection; S2: curing agent selection; S3: solidified soil proportion test; S4: premixed fluidized solidified soil mixing; S5: solidified soil layered backfilling; S6: maintenance, which can ensure the quality of the solidified soil product and improve the construction efficiency; however, in the above steps, the construction site is not waterproofed, which will cause the solidified soil to be affected by water seepage during the construction process, resulting in reduced consistency of the mixture and insufficient strength of the solidified soil, thereby affecting the construction quality. Summary of the invention

[0004] Based on the existing problems of premixed fluidized solidified soil, the present invention proposes a method for constructing premixed fluidized solidified soil.

[0005] A method for constructing premixed fluidized solidified soil proposed by the present invention comprises the following steps:

[0006] S1: Make waterproof and protective layer on the outer wall of the basement;

[0007] S2: soil material selection;

[0008] S3: curing agent selection;

[0009] S4: Mixing of premixed fluidized solidified soil;

[0010] S5: backfilling the solidified soil in layers;

[0011] S6: Maintenance.

[0012] Preferably, the steps for waterproofing the basement exterior wall are as follows:

[0013] A. Repair and level the wall: Before waterproofing, make sure the wall is level and has no cracks, holes or other defects.

[0014] B. Screw hole plugging: Screws are used to fix the wall structure during exterior wall construction. After removing the screws, the holes need to be plugged to prevent moisture penetration;

[0015] C. 1.5 mm thick cement-based penetrating crystalline coating: After the screw holes are sealed, a 1.5 mm thick penetrating crystalline waterproof coating needs to be applied. This coating can penetrate into the concrete to form a waterproof layer.

[0016] D. 1.5 mm thick reactive bonding polymer membrane-based wet-laid waterproofing membrane: After the coating dries, it is necessary to lay a 1.5 mm thick reactive bonding polymer membrane-based waterproofing membrane, which has good adhesion and waterproofing properties;

[0017] E. 120mm thick brick wall protection layer: Build a 120mm thick brick wall on the waterproof membrane as a protective layer for the waterproof layer. The brick wall can provide additional protection to prevent the waterproof layer from external damage;

[0018] F. Backfill soil: Backfill soil on the waterproof layer and protective layer to ensure that the waterproof layer is not damaged.

[0019] Through the above technical solution, it is possible to achieve: 1. Multi-level protection: from the inside to the outside, each layer has its specific protective function, forming a three-dimensional protective network; 2. Complementary effect: the characteristics of different materials complement each other, such as the penetration crystallization effect of coatings and the physical barrier effect of roll materials; 3. Strong adaptability: This system can adapt to different environments and structural requirements and provide reliable waterproofing solutions.

[0020] Preferably, after the waterproof construction of the basement exterior wall is completed, the exterior wall post-casting strip adopts the method of advanced water-stop post-casting strip, and the steps are as follows:

[0021] A. Measurement and setting out:

[0022] Use measuring tools to accurately lay out the location of the exterior wall post-casting strip according to the design drawings to ensure the accuracy of the construction location;

[0023] B. Basic treatment:

[0024] Clean up loose materials, oil stains, slurry, etc. in the post-casting zone to ensure that the base is solid and clean for subsequent construction;

[0025] C. Advance stop reinforcement binding:

[0026] Tie the steel bars according to the design requirements. These steel bars will enhance the tensile strength of the post-cast belt and provide support for the waterproof layer.

[0027] D. Waterstop steel plate welding:

[0028] Weld water-stop steel plates at key locations of post-cast strips to form an effective waterproof barrier to prevent moisture from passing through construction joints;

[0029] E. External water stop tape pasting:

[0030] Paste external waterstop strips on both sides of the waterstop steel plate, which helps to further improve the waterproof effect and prevent water penetration;

[0031] F. Installation of water-expandable waterstop strips:

[0032] Install water-swellable waterproofing strips, which expand when exposed to water, thus filling any gaps and enhancing waterproofing capabilities;

[0033] G. External brick wall construction:

[0034] After completing the above waterproofing measures, build the outer brick wall to protect the waterproof layer.

[0035] Through the above technical solution, it can be ensured that the building's waterproof layer is not only accurately constructed, but also has long-term effectiveness and durability, thereby ensuring the overall safety and living comfort of the building, while reducing long-term maintenance costs.

[0036] Preferably, clay, silty clay, sandy silt soil, etc. are used with priority, the organic matter content of which is not more than 5%, and the particle size of which is not more than 25 mm. Untreated contaminated soil shall not be used as the raw material for solidified soil.

[0037] Through the above technical solution, clay, silty clay, sandy silt and other materials are given priority and their characteristics are restricted. Overall, the quality, safety, environmental protection and economy of the soil solidification project can be ensured, providing a solid and reliable foundation for construction and infrastructure.

[0038] Preferably, a liquid with cement, lime or fly ash as the main component is used as a curing agent, and the finished curing agent should meet the following technical requirements:

[0039] Fineness: 80μm square hole sieve residue ≤10%;

[0040] Moisture content ≤1%;

[0041] During construction, the fluidity of the solidified soil slurry in the mixed state should be ≥100mm at the beginning, ≥90mm at 30min, ≥80mm at 60min, the initial setting time should be ≥45min, and the final setting time should be <720min.

[0042] Or when the time from mixing to pouring does not exceed 1h, no requirement is made on the fluidity of the slurry.

[0043] Through the above technical solution, by ensuring the fineness and fluidity of the curing agent, the quality and uniformity of the cured soil are improved, thereby improving the quality of the entire project; and reasonable initial setting and final setting time and fluidity requirements make the construction process smoother and reduce the difficulty of construction.

[0044] Preferably, a stirring device is used to evenly stir the soil and the curing agent to form the cured soil, and the steps are as follows:

[0045] A. Add an appropriate amount of soil into the mixing device;

[0046] B. Then add the calculated curing agent according to the proportion of ingredients;

[0047] C. Then add an appropriate amount of water. The amount of water needs to be determined according to the actual moisture content of the soil and the ratio requirements of the curing agent;

[0048] D. When using admixtures, they can be added in the prescribed proportion before or after adding water;

[0049] E. Turn on the stirring device and stir for at least 2 minutes to ensure that all materials are evenly mixed.

[0050] Through the above technical solution, the solidified soil materials are ensured to be mixed evenly, the quality of the solidified soil is improved, and the automated mixing reduces manual errors and improves construction efficiency and speed.

[0051] Preferably, the stirring device is fixedly installed in the middle of the transport vehicle, and L-shaped fixing plates are fixedly provided at both ends of the transport vehicle, and hydraulic cylinders are fixedly provided on both sides of the top of the L-shaped fixing plate, and the output end of the hydraulic cylinder movably passes through the L-shaped fixing plate to the bottom of the L-shaped fixing plate where a support seat is fixed;

[0052] The stirring device includes a stirring drum, and a first feeding pipe penetrating the stirring drum is fixedly provided on the outer wall of the stirring drum near the end of the stirring drum, and the first feeding pipe penetrates the transport vehicle to the outer wall of the top of the transport vehicle, a feeding hopper is fixedly provided on the top of the first feeding pipe, and a first solenoid valve is installed on the outer wall of the first feeding pipe at the bottom of the feeding hopper, a ventilation pipe penetrating the stirring drum is fixedly provided at the other end of the outer wall of the stirring drum, and the first feeding pipe and the ventilation pipe are parallel to each other on the outer wall of the stirring drum, a first discharging pipe penetrating the stirring drum is fixedly provided on the side opposite to the ventilation pipe on the outer wall of the stirring drum, and the first discharging pipe penetrates the transport vehicle to the outside of the bottom of the transport vehicle, and a second solenoid valve is installed on the outer wall of the first discharging pipe;

[0053] A first shaft is rotatably fixed in the middle of the mixing drum, and a second shaft is fixed to a bearing on the outer wall of the first shaft, a third shaft is fixed to a bearing on the outer wall of the second shaft, a fourth shaft is fixed to the bearing on the outer wall of the third shaft, and a fifth shaft is fixed to the bearing on the outer wall of the fourth shaft, and the length of the fifth shaft is smaller than the fourth shaft, smaller than the third shaft, smaller than the second shaft, and smaller than the first shaft, and first stirring blades are fixed to the outer walls of the first shaft, the second shaft, the third shaft, the fourth shaft and the fifth shaft inside the mixing drum, each of the first stirring blades is provided with four mounting grooves, and a second stirring blade is rotatably fixed in the middle of each mounting groove The stirring blade, the first shaft rod, the second shaft rod, the third shaft rod, the fourth shaft rod and the fifth shaft rod all have bearings that pass through the mixing drum to one end of the mixing drum and are fixedly connected to the outside with a second gear. The inner wall of the transport vehicle on the same side as the second gear is fixedly provided with a first motor with the same number as the second gear, and the transmission shaft of each first motor is coaxially fixed with a first rotating shaft through a coupling, and each first rotating shaft is rotationally fixed to the end of the mixing drum, a first gear is fixedly connected to the outer wall of each first rotating shaft, and each first gear is meshed with each second gear, and a first reducer is installed between the first gear on the outer wall of each first rotating shaft and the first motor.

[0054] Through the above technical scheme, the design of shafts of different lengths (the first to fifth shafts) and double-layer stirring blades (the first and second stirring blades) can provide a more effective stirring flow field, which is suitable for soils of different viscosities and densities. The design of the L-shaped fixed plate and the hydraulic cylinder enables the mixing drum to remain stable during the mixing process, reduce vibration, and improve the mixing quality. The combination of the first motor and the first reducer provides adjustability of the stirring speed to adapt to different mixing requirements and soil conditions.

[0055] Preferably, the filling operation is as follows:

[0056] A. Preparation before construction:

[0057] Remove garbage, tree roots and other debris from the construction surface to ensure the cleanliness of the construction surface, analyze and remove accumulated water, and take measures to prevent water from accumulating again in the construction area to ensure construction quality;

[0058] B. Solidified soil filling method:

[0059] Observe the conditions on site and select a suitable filling method, including a delivery pump or a chute method, wherein the delivery pump and the feed end of the chute are both connected to the first discharge pipe of the stirring device;

[0060] C. Filling time limit:

[0061] The time from mixing to filling completion shall not exceed 6 hours to ensure the quality of solidified soil;

[0062] D. Winter construction requirements:

[0063] The temperature of the solidified soil entering the mold should not be lower than 5°C, and insulation measures should be taken to prevent low temperature from affecting the solidification effect;

[0064] E. Layered filling requirements:

[0065] Fill in layers, the thickness of each layer should not be greater than 2m, the height difference of adjacent filling areas should not be greater than 1m, and the time interval between two fillings should be determined based on experience or tests, and should not be less than 24 hours;

[0066] F. Filling order:

[0067] When the bottom elevation of the foundation pit is inconsistent, the deep part should be constructed first, and then the shallow part;

[0068] G. Construction of large-area foundation cushion:

[0069] Use wooden boards to separate and construct in sections symmetrically. Make the joints into steps, and the distance between the upper and lower layers should not be less than 1m.

[0070] H. Matters needing attention in conveying construction of conveying pump:

[0071] When discharging materials, care should be taken to avoid direct impact on the basement exterior wall and supporting structure, and to protect the waterproof measures that have been set up;

[0072] I. Vibration requirements:

[0073] When the slump of the solidified soil is less than 150mm, a vibrating device should be used to vibrate it after filling to improve the compactness; the vibrating device can use a flat vibrator or an inserted vibrating rod;

[0074] J. Prohibitions during pouring:

[0075] It is strictly forbidden to add water during the pouring process to avoid affecting the strength and stability of the solidified soil;

[0076] K. Severe weather response measures:

[0077] In case of heavy rain or continuous drizzle, the unhardened surface of the fill should be covered and the opening of new working sections should be suspended to ensure construction safety and quality.

[0078] Through the above technical solution, it can ensure that the construction quality of the solidified soil meets the design requirements, reduce the safety risks in the construction process, improve the construction efficiency, and shorten the construction period;

[0079] Adjusting construction strategies according to different climatic conditions, site environment, filling sequence and layered construction can ensure smooth construction and the long-term stability and durability of the solidified soil foundation.

[0080] Preferably, the conveying pump includes a conveying pipe, and a conveying groove is opened in the middle of the conveying pipe, a support plate is fixedly provided at the lower part of one end of the conveying pipe, and a second motor is fixedly provided on the top of the support plate, and the second motor drive shaft is coaxially fixed with a second rotating shaft through a coupling, the second rotating shaft rotates through the conveying pipe to the other end of the conveying pipe and is rotated and fixed inside, threaded conveying blades are fixedly provided on the outer wall of the second rotating shaft inside the conveying pipe, a second feed pipe that is connected to the conveying groove is fixed at the top of the conveying pipe near the second motor end, and a second discharge pipe that is connected to the conveying groove is fixed at the lower end of the conveying pipe away from the second motor end, a second reducer is installed on the outside of the conveying pipe on the outer wall of the second rotating shaft, and a connecting pipe is detachably fixed on the top of the second feed pipe.

[0081] Through the above technical solution, the design of the threaded conveying blades can effectively push the solidified soil, reduce the resistance during the conveying process, and improve the conveying efficiency, while the second reducer allows the operator to adjust the conveying speed according to construction requirements to adapt to different filling conditions.

[0082] Preferably, the curing steps for the solidified soil are as follows:

[0083] A. After each layer or the top layer is filled, the solidified soil should be maintained;

[0084] B. The curing of solidified soil can be done by watering or covering to keep it moist. When using plastic film for curing, the surface of the solidified soil should be covered tightly and condensed water should be kept inside the film.

[0085] C. The curing time of the top layer of solidified soil shall not be less than 7 days.

[0086] Through the above technical scheme, it can be ensured that the construction quality of the solidified soil meets the design requirements, laying a solid foundation for subsequent construction or use, and helping to improve the durability of the solidified soil and reduce early damage caused by improper maintenance.

[0087] The beneficial effects of the present invention are:

[0088] 1. Through the precise waterproof construction steps in the present invention, including repairing, sealing, applying waterproof coatings, laying waterproof membranes and building brick walls, the waterproof performance of the basement exterior wall is effectively improved, ensuring that the solidified soil is not affected by moisture during the construction process; and the use of polymer membrane-based wet-laid waterproof membranes and externally attached waterstops, as well as water-swelling waterstop strips, these measures further enhance the performance of the waterproof layer and reduce the risk of moisture penetration, thereby ensuring the consistency and strength of the solidified soil and ensuring the construction quality.

[0089] 2. The mixing device is fixed inside the transport vehicle, so that the preparation and transportation of the solidified soil can be completed on a mobile platform, which improves the flexibility and convenience of construction, and also realizes the on-site preparation and transportation of the solidified soil, reducing the time of material transportation and on-site mixing, and improving the construction efficiency; the design of the hydraulic cylinder and the support seat provides stable support, ensuring the stability and safety of the mixing device during transportation, and through the cooperation of the transport vehicle and the hydraulic cylinder, it can ensure horizontal transportation and transportation requirements with a certain height; the multi-stage shaft rods (the first to the fifth shaft rods) and the mixing blades (the first and second mixing blades) inside the mixing drum ) design can provide sufficient stirring effect, so that the solidified soil can be fully mixed and dispersed during the stirring process, thereby improving the stirring efficiency. Moreover, through the cooperation of the multi-stage shaft (the first to the fifth shaft) and the stirring blades (the first and the second stirring blades), the solidified soil can be evenly mixed in the mixing drum, thus avoiding the situation of insufficient or excessive local mixing and ensuring the quality of the solidified soil. The combination of the first motor and the first reducer provides the adjustability of the stirring speed to meet different stirring requirements. At the same time, the first motor is engaged with the second gear at the end of the mixing drum through the coupling and the first rotating shaft, thereby realizing automatic control of the stirring process.

[0090] 3. The design of the first feed pipe and feed hopper allows the solidified soil to enter the mixing drum from the top of the transport vehicle, and the first discharge pipe allows the solidified soil to be output from the mixing drum to the filling site. The second solenoid valve controls the discharge process, ensuring the flexibility of feeding and discharging. Through the control of the first motor and the first reducer, the operator can easily adjust the mixing speed and mixing time to meet different construction needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] Figure 1 A schematic diagram of the connection between a stirring device and a delivery pump in a method for construction of premixed fluidized solidified soil proposed by the present invention;

[0092] Figure 2 A cross-sectional view of a stirring device for a method of constructing premixed fluidized solidified soil proposed by the present invention;

[0093] Figure 3 This is a diagram showing the internal structure of a stirring device for a method of constructing premixed fluidized solidified soil proposed by the present invention;

[0094] Figure 4 A cross-sectional view of the internal structure of a stirring device for a method for constructing premixed fluidized solidified soil proposed by the present invention;

[0095] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0096] Figure 6 for Figure 4 Enlarged view of point B in the middle;

[0097] Figure 7 A cross-sectional view of a delivery pump for a method of constructing premixed fluidized solidified soil proposed by the present invention.

[0098] In the figure: 1, transport vehicle; 2, stirring device; 3, delivery pump; 4, L-shaped fixing plate; 5, hydraulic cylinder; 6, support seat; 201, stirring drum; 202, first feeding pipe; 203, feeding hopper; 205, first solenoid valve; 206, first discharging pipe; 207, second solenoid valve; 208, first stirring blade; 209, mounting groove; 210, second stirring blade; 211, ventilation pipe; 212, first shaft rod; 213, second shaft rod; 214, third shaft Rod; 215, fourth shaft; 216, fifth shaft; 217, first motor; 218, first rotating shaft; 219, first reducer; 220, first gear; 221, second gear; 301, conveying pipe; 302, conveying trough; 303, second rotating shaft; 304, threaded conveying blade; 305, second discharge pipe; 306, second feed pipe; 307, connecting pipe; 308, support plate; 309, second motor; 310, second reducer. DETAILED DESCRIPTION

[0099] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0100] Embodiment 1:

[0101] A method for construction of premixed fluidized solidified soil,

[0102] 1. First, make waterproof and protective layers on the outer wall of the basement. The steps are as follows:

[0103] 1. First, the steps for waterproofing the exterior wall of the basement are as follows:

[0104] A. Repair and level the wall: Before waterproofing, make sure the wall is level and has no cracks, holes or other defects.

[0105] B. Screw hole plugging: Screws are used to fix the wall structure during exterior wall construction. After removing the screws, the holes need to be plugged to prevent moisture penetration;

[0106] C. 1.5 mm thick cement-based penetrating crystalline coating: After the screw holes are sealed, a 1.5 mm thick penetrating crystalline waterproof coating needs to be applied. This coating can penetrate into the concrete to form a waterproof layer.

[0107] D. 1.5 mm thick reactive bonding polymer membrane-based wet-laid waterproofing membrane: After the coating dries, it is necessary to lay a 1.5 mm thick reactive bonding polymer membrane-based waterproofing membrane, which has good adhesion and waterproofing properties;

[0108] E. 120mm thick brick wall protection layer: Build a 120mm thick brick wall on the waterproof membrane as a protective layer for the waterproof layer. The brick wall can provide additional protection to prevent the waterproof layer from external damage;

[0109] F. Backfill soil: Backfill soil on the waterproof layer and protective layer to ensure that the waterproof layer is not damaged.

[0110] 2. After the waterproof construction of the basement exterior wall is completed, the exterior wall post-casting strip adopts the method of advanced water-stop post-casting strip. The steps are as follows:

[0111] A. Measurement and setting out:

[0112] Use measuring tools to accurately lay out the location of the exterior wall post-casting strip according to the design drawings to ensure the accuracy of the construction location;

[0113] B. Basic treatment:

[0114] Clean up loose materials, oil stains, slurry, etc. in the post-casting zone to ensure that the base is solid and clean for subsequent construction;

[0115] C. Advance stop reinforcement binding:

[0116] Tie the steel bars according to the design requirements. These steel bars will enhance the tensile strength of the post-cast belt and provide support for the waterproof layer.

[0117] D. Waterstop steel plate welding:

[0118] Weld water-stop steel plates at key locations of post-cast strips to form an effective waterproof barrier to prevent moisture from passing through construction joints;

[0119] E. External water stop tape pasting:

[0120] Paste external waterstop strips on both sides of the waterstop steel plate, which helps to further improve the waterproof effect and prevent water penetration;

[0121] F. Installation of water-expandable waterstop strips:

[0122] Install water-swellable waterproofing strips, which expand when exposed to water, thus filling any gaps and enhancing waterproofing capabilities;

[0123] G. External brick wall construction:

[0124] After completing the above waterproofing measures, build the outer brick wall to protect the waterproof layer.

[0125] 2. When selecting soil materials, clay, silty clay, sandy silt soil, etc. should be given priority, with an organic matter content of no more than 5% and a particle size of no more than 25 mm. Untreated contaminated soil shall not be used as raw material for solidified soil.

[0126] 3. Selection of curing agent: liquid with cement, lime or fly ash as the main component is used as curing agent. The finished curing agent should meet the following technical requirements:

[0127] Fineness: 80μm square hole sieve residue ≤10%;

[0128] Moisture content ≤1%;

[0129] During construction, the fluidity of the solidified soil slurry in the mixed state should be ≥100mm at the beginning, ≥90mm at 30min, ≥80mm at 60min, the initial setting time should be ≥45min, and the final setting time should be <720min.

[0130] Or when the time from mixing to pouring does not exceed 1h, no requirement is made on the fluidity of the slurry.

[0131] 4. Premixed fluidized solidified soil is mixed, using a stirring device to mix the soil and the solidifying agent evenly to form solidified soil. The steps are as follows:

[0132] A. Add an appropriate amount of soil into the stirring device 2;

[0133] B. Then add the calculated curing agent according to the proportion of ingredients;

[0134] C. Then add an appropriate amount of water. The amount of water needs to be determined according to the actual moisture content of the soil and the ratio requirements of the curing agent;

[0135] D. When using admixtures, they can be added in the prescribed proportion before or after adding water;

[0136] E. Turn on stirring device 2 and stir for at least 2 minutes to ensure that all materials are evenly mixed.

[0137] F. Deviations in the batching process are allowed, so that the curing agent and water are ±2%, soil is ±3%, and admixture is ±1%.

[0138] G. Anti-freeze measures should be taken during winter mixing, and heating water should be used to increase the temperature of the mixture. The mixing water temperature should not exceed 60°C.

[0139] 5. Backfill the solidified soil in layers. The filling operation is as follows:

[0140] A. Preparation before construction:

[0141] Make sure there is no water on the construction surface and that the construction surface has been waterproofed. Then remove garbage, tree roots and other debris on the construction surface to ensure the cleanliness of the construction surface to ensure construction quality.

[0142] B. Solidified soil filling method:

[0143] Observe the conditions on site to select a suitable filling method, including delivery by a delivery pump 3 or a chute method. In this embodiment, a delivery pump 3 is used for delivery. A delivery pump 3 is installed on the first discharge pipe 206 of the stirring device 2, so that the solidified soil is delivered to the construction site by the delivery pump 3 to facilitate filling;

[0144] C. Filling time limit:

[0145] The time from mixing to filling completion shall not exceed 6 hours to ensure the quality of solidified soil;

[0146] D. Winter construction requirements:

[0147] The temperature of the solidified soil entering the mold should not be lower than 5°C, and insulation measures should be taken to prevent low temperature from affecting the solidification effect;

[0148] E. Layered filling requirements:

[0149] Fill in layers, the thickness of each layer should not be greater than 2m, the height difference of adjacent filling areas should not be greater than 1m, and the time interval between two fillings should be determined based on experience or tests, and should not be less than 24 hours;

[0150] F. Filling order:

[0151] When the bottom elevation of the foundation pit is inconsistent, the deep part should be constructed first, and then the shallow part;

[0152] G. Construction of large-area foundation cushion:

[0153] Use wooden boards to separate and construct in sections symmetrically. Make the joints into steps, and the distance between the upper and lower layers should not be less than 1m.

[0154] H. Matters needing attention in conveying construction of conveying pump:

[0155] When discharging materials, care should be taken to avoid direct impact on the basement exterior wall and supporting structure, and to protect the waterproof measures that have been set up;

[0156] I. Vibration requirements:

[0157] When the slump of the solidified soil is less than 150mm, a vibrating device should be used to vibrate it after filling to improve the compactness; the vibrating device can use a flat vibrator or an inserted vibrating rod;

[0158] J. Prohibitions during pouring:

[0159] It is strictly forbidden to add water during the pouring process to avoid affecting the strength and stability of the solidified soil;

[0160] K. Severe weather response measures:

[0161] In case of heavy rain or continuous drizzle, the unhardened surface of the fill should be covered and the opening of new working sections should be suspended to ensure construction safety and quality.

[0162] 6. Maintenance, the maintenance steps are as follows:

[0163] A. After each layer or the top layer is filled, the solidified soil should be maintained;

[0164] B. The curing of solidified soil can be done by watering or covering to keep it moist. When using plastic film for curing, the surface of the solidified soil should be covered tightly and condensed water should be kept inside the film.

[0165] C. The curing time of the top layer of solidified soil shall not be less than 7 days.

[0166] Embodiment 2:

[0167] Reference Figure 1-Figure 7In this embodiment, the stirring device 2 and the delivery pump 3 are further described. The stirring device 2 is fixedly installed in the middle of the transport vehicle 1, and L-shaped fixing plates 4 are fixedly provided at both ends of the transport vehicle 1, and hydraulic cylinders 5 are fixedly provided on both sides of the top of the L-shaped fixing plate 4. The output end of the hydraulic cylinder 5 movably passes through the L-shaped fixing plate 4 to the bottom of the L-shaped fixing plate 4, where a support seat 6 is fixed; the stirring device 2 includes a stirring drum 201, and a first feeding pipe 202 that passes through the stirring drum 201 is fixedly provided on the outer wall of the stirring drum 201 near the end of the stirring drum 201, and the first feeding pipe 202 passes through the transport vehicle 1 to the outer wall of the top of the transport vehicle 1, and a A feed hopper 203, on which a scale bar is arranged for measuring the volume of the material, and a first solenoid valve 205 is installed at the bottom of the feed hopper 203 on the outer wall of the first feed pipe 202, a ventilation pipe 211 penetrating the mixing drum 201 is fixedly arranged at the other end of the outer wall of the mixing drum 201, and the first feed pipe 202 and the ventilation pipe 211 are parallel to each other on the outer wall of the mixing drum 201, and a first discharge pipe 206 penetrating the mixing drum 201 is fixedly arranged on the side opposite to the ventilation pipe 211 on the outer wall of the mixing drum 201, and the first discharge pipe 206 penetrates the transport vehicle 1 to the outside of the bottom of the transport vehicle 1, and a second solenoid valve 207 is installed on the outer wall of the first discharge pipe 206;A first shaft 212 is rotatably fixed in the middle of the mixing drum 201, and a second shaft 213 is fixed on the outer wall bearing of the first shaft 212, a third shaft 214 is fixed on the outer wall bearing of the second shaft 213, a fourth shaft 215 is fixed on the outer wall bearing of the third shaft 214, and a fifth shaft 216 is fixed on the outer wall bearing of the fourth shaft 215, and the length of the fifth shaft 216 is smaller than the fourth shaft 215, smaller than the third shaft 214, smaller than the second shaft 213, and smaller than the first shaft 212, and first stirring blades 208 are fixed on the outer walls of the first shaft 212, the second shaft 213, the third shaft 214, the fourth shaft 215 and the fifth shaft 216 inside the mixing drum 201, each of the first stirring blades 208 is provided with four mounting grooves 209, and a fifth stirring blade 208 is rotatably fixed in the middle of each mounting groove 209. The present invention relates to a mixing drum 201 having two stirring blades 210, and the first shaft 212, the second shaft 213, the third shaft 214, the fourth shaft 215 and the fifth shaft 216 are all borne through the mixing drum 201 to one end of the mixing drum 201, and the second gear 221 is fixedly connected to the outside. The same number of first motors 217 as the second gear 221 is fixedly arranged on the inner wall of the transport vehicle 1 on the same side as the second gear 221, and the transmission shaft of each first motor 217 is coaxially fixed with a first rotating shaft 218 through a coupling, and each first rotating shaft 218 is rotatably fixed to the end of the mixing drum 201, and the first gear 220 is fixedly connected to the outer wall of each first rotating shaft 218, and each first gear 220 is meshed with each second gear 221, and a first reducer 219 is installed between the first gear 220 on the outer wall of each first rotating shaft 218 and the first motor 217. The multi-stage shafts (first shaft 212, second shaft 213, third shaft 214, fourth shaft 215, fifth shaft 216) and stirring blades (first stirring blade 208, second stirring blade 210) in the mixing drum 201 can provide sufficient stirring effect to ensure that the solidified soil is evenly mixed during the stirring process, and the raw materials can be fed into the mixing drum 201 through the first feeding pipe 202 and the feeding hopper 203; the stirred solidified soil can be transported to the filling site through the first discharging pipe 206 and the second solenoid valve 207; the combination of the first motor 217 and the first reducer 219 provides the adjustability of the stirring speed to meet different stirring requirements, and the first motor 217 is meshed with the second gear 221 at the end of the mixing drum 201 through the coupling and the first rotating shaft 218, thereby realizing the automatic control of the stirring process. ;

[0168] The delivery pump 3 includes a delivery pipe 301, and a delivery groove 302 is opened in the middle of the delivery pipe 301, a support plate 308 is fixedly provided at the lower part of one end of the delivery pipe 301, and a second motor 309 is fixedly provided on the top of the support plate 308, and a second rotating shaft 303 is coaxially fixed to the transmission shaft of the second motor 309 through a coupling, and the second rotating shaft 303 rotates and penetrates the delivery pipe 301 to the other end of the delivery pipe 301 and is rotated and fixed inside, and a threaded delivery blade 304 is fixedly provided on the outer wall of the second rotating shaft 303 inside the delivery pipe 301, a second feed pipe 306 that penetrates the delivery groove 302 is fixedly provided at one end of the top of the delivery pipe 301 close to the second motor 309, and a second discharge pipe 305 that penetrates the delivery groove 302 is fixedly provided at one end of the lower part of the delivery pipe 301 away from the second motor 309, and a second rotating shaft 303 is fixedly provided on the outer wall of the second rotating shaft 303. A second reducer 310 is installed outside the outer wall conveying pipe 301, and a connecting pipe 307 is detachably fixed on the top of the second feed pipe 306, and the connecting pipe 307 is used for connecting the first discharge pipe 206 and the second feed pipe 306. The design of the threaded conveying blade 304 can effectively push the solidified soil, reduce the resistance during the conveying process, and improve the conveying efficiency. The second reducer 310 is provided to allow the operator to adjust the conveying speed according to the construction requirements to adapt to different filling conditions, and the automated conveying pump 3 reduces the need for manual handling, reduces the labor intensity, and improves the construction safety. Through the closed conveying pipe 301, the solidified soil is not affected by the external environment during the conveying process, and its uniformity and solidification effect are maintained. The structural design of the conveying pump 3 enables it to adapt to various construction sites, whether it is horizontal conveying or conveying with a certain height.

[0169] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for construction of premixed fluidized solidified soil, characterized in that The following steps are involved: S1: Make waterproof and protective layer on the outer wall of the basement; S2: soil material selection; S3: curing agent selection; S4: Mixing of premixed fluidized solidified soil; S5: backfilling the solidified soil in layers; S6: Maintenance.

2. The method for construction of premixed fluidized solidified soil according to claim 1, characterized in that In S1: The steps for waterproofing the basement exterior wall are as follows: A. Repair and level the wall: Before waterproofing, make sure the wall is level and has no cracks or holes. B. Screw hole sealing: Screws are used to fix the wall structure during exterior wall construction. After removing the screws, the holes need to be sealed to prevent moisture penetration; C. 1.5 mm thick cement-based penetrating crystalline coating: After the screw holes are sealed, a 1.5 mm thick penetrating crystalline waterproof coating needs to be applied. This coating can penetrate into the concrete to form a waterproof layer. D. 1.5 mm thick reactive bonding polymer membrane-based wet-laid waterproofing membrane: After the coating dries, it is necessary to lay a 1.5 mm thick reactive bonding polymer membrane-based waterproofing membrane, which has good adhesion and waterproofing properties; E. 120mm thick brick wall protection layer: Build a 120mm thick brick wall on the waterproof membrane as a protective layer for the waterproof layer. The brick wall can provide additional protection to prevent the waterproof layer from external damage; F. Backfill soil: Backfill soil on the waterproof layer and protective layer to ensure that the waterproof layer is not damaged.

3. The method for construction of premixed fluidized solidified soil according to claim 1, characterized in that In S1: After the waterproof construction of the basement exterior wall is completed, the exterior wall post-casting strip adopts the method of advanced water-stop post-casting strip, and the steps are as follows: A. Measurement and setting out: Use measuring tools to accurately lay out the location of the exterior wall post-casting strip according to the design drawings to ensure the accuracy of the construction location; B. Basic treatment: Clean up loose materials, oil stains, slurry and other garbage in the post-casting zone to ensure that the base is solid and clean for subsequent construction; C. Advance stop reinforcement binding: Tie the steel bars according to the design requirements. These steel bars will enhance the tensile strength of the post-cast belt and provide support for the waterproof layer. D. Waterstop steel plate welding: Weld water-stop steel plates at key locations of post-cast strips to form an effective waterproof barrier to prevent moisture from passing through construction joints; E. External water stop tape pasting: Paste external waterstop strips on both sides of the waterstop steel plate, which helps to further improve the waterproof effect and prevent water penetration; F. Installation of water-expandable waterstop strips: Install water-swellable waterproofing strips, which expand when exposed to water, thus filling any gaps and enhancing waterproofing capabilities; G. External brick wall construction: After completing the waterproofing measures, build the outer brick wall to protect the waterproof layer.

4. The method for construction of premixed fluidized solidified soil according to claim 1, characterized in that In S2: priority shall be given to soils such as clay, silty clay, and sandy silt, with an organic matter content of no more than 5% and a particle size of no more than 25 mm. Untreated contaminated soil shall not be used as raw material for solidified soil.

5. The method for construction of premixed fluidized solidified soil according to claim 1, characterized in that In S3: a liquid with cement, lime or fly ash as the main component is used as a curing agent, and the finished curing agent should meet the following technical requirements: Fineness: 80μm square hole sieve residue ≤10%; Moisture content ≤1%; During construction, the fluidity of the solidified soil slurry in the mixed state should be ≥100mm at the beginning, ≥90mm at 30min, ≥80mm at 60min, the initial setting time should be ≥45min, and the final setting time should be <720min. Or when the time from mixing to pouring does not exceed 1h, no requirement is made on the fluidity of the slurry.

6. The method for construction of premixed fluidized solidified soil according to claim 1, characterized in that In S4: using a stirring device (2) to stir the soil and the curing agent evenly to form a solidified soil, the steps are as follows: A. Add an appropriate amount of soil into the stirring device (2); B. Then add the calculated curing agent according to the proportion of ingredients; C. Then add an appropriate amount of water. The amount of water needs to be determined according to the actual moisture content of the soil and the ratio requirements of the curing agent; D. When using admixtures, add them in the prescribed proportion before or after adding water; E. Turn on the stirring device (2) and stir for at least 2 minutes to ensure that all materials are evenly mixed.

7. A method for construction of premixed fluidized solidified soil according to claim 6, characterized in that: The stirring device (2) is fixedly installed in the middle of the transport vehicle (1), and L-shaped fixing plates (4) are fixedly provided at both ends of the transport vehicle (1), and hydraulic cylinders (5) are fixedly provided on both sides of the top of the L-shaped fixing plate (4), and the output end of the hydraulic cylinder (5) movably passes through the L-shaped fixing plate (4) to the bottom of the L-shaped fixing plate (4) where a support seat (6) is fixed; The stirring device (2) comprises a stirring drum (201), and a first feeding pipe (202) which is in communication with the stirring drum (201) is fixedly provided on the outer wall of the stirring drum (201) near the end of the stirring drum (201), and the first feeding pipe (202) passes through the transport vehicle (1) to the outer wall of the top of the transport vehicle (1), a feeding hopper (203) is fixedly provided on the top of the first feeding pipe (202), and a first solenoid valve (205) is installed on the bottom of the feeding hopper (203) on the outer wall of the first feeding pipe (202), and a first solenoid valve (205) is installed on the outer wall of the stirring drum (201) ) a ventilation pipe (211) penetrating the mixing drum (201) is fixedly provided at the other end of the outer wall thereof, and the first feed pipe (202) and the ventilation pipe (211) are parallel to each other on the outer wall of the mixing drum (201), a first discharge pipe (206) penetrating the mixing drum (201) is fixedly provided on the side of the outer wall of the mixing drum (201) opposite to the ventilation pipe (211), and the first discharge pipe (206) penetrates the transport vehicle (1) to the outside of the bottom of the transport vehicle (1), and a second solenoid valve (207) is installed on the outer wall of the first discharge pipe (206); A first shaft (212) is rotatably fixed in the middle of the mixing drum (201), a second shaft (213) is fixed to an outer wall bearing of the first shaft (212), a third shaft (214) is fixed to an outer wall bearing of the second shaft (213), a fourth shaft (215) is fixed to an outer wall bearing of the third shaft (214), a fifth shaft (216) is fixed to an outer wall bearing of the fourth shaft (215), and the length of the fifth shaft (216) is less than that of the fourth shaft ( The outer walls of the first shaft (212), the second shaft (213), the third shaft (214), the fourth shaft (215) and the fifth shaft (216) are all fixed with first stirring blades (208) inside the stirring drum (201), and each of the first stirring blades (208) is provided with four mounting grooves (209), and a first stirring blade (208) is rotatably fixed in the middle of each mounting groove (209). The first shaft (212), the second shaft (213), the third shaft (214), the fourth shaft (215) and the fifth shaft (216) are all connected to the mixing drum (201) by bearings, and the second gear (221) is fixedly connected to the outside of one end of the mixing drum (201). The same number of first motors (217) as the second gears (221) are fixedly provided on the inner wall of the transport vehicle (1) on the same side as the second gears (221), and each first motor (217) The transmission shafts are coaxially fixed with a first rotating shaft (218) via a coupling, and each first rotating shaft (218) is rotationally fixed to the end of the mixing drum (201), a first gear (220) is fixedly connected to the outer wall of each first rotating shaft (218), and each first gear (220) is meshed with each second gear (221), and a first reducer (219) is installed between the first gear (220) on the outer wall of each first rotating shaft (218) and the first motor (217).

8. A method for construction of premixed fluidized solidified soil according to claim 7, characterized in that In S5, the filling operation is as follows: A. Preparation before construction: Remove debris such as garbage and tree roots from the construction surface to ensure the cleanliness of the construction surface, analyze and remove accumulated water, and take measures to prevent water from accumulating again in the construction area to ensure construction quality; B. Solidified soil filling method: Observe the conditions on site and select a suitable filling method, including conveying by a conveying pump (3) or a chute method, wherein the feeding ends of the conveying pump (3) and the chute are both connected to the first discharge pipe (206) of the stirring device (2); C. Filling time limit: The time from mixing to filling completion shall not exceed 6 hours to ensure the quality of solidified soil; D. Winter construction requirements: The temperature of the solidified soil entering the mold should not be lower than 5°C, and insulation measures should be taken to prevent low temperature from affecting the solidification effect; E. Layered filling requirements: Fill in layers, the thickness of each layer should not be greater than 2m, the height difference of adjacent filling areas should not be greater than 1m, and the time interval between two fillings should be determined based on experience or tests, and should not be less than 24 hours; F. Filling order: When the bottom elevation of the foundation pit is inconsistent, the deep part should be constructed first, and then the shallow part; G. Construction of large-area foundation cushion: Use wooden boards to separate and construct in sections symmetrically. Make the joints into steps, and the distance between the upper and lower layers should not be less than 1m. H. Matters needing attention in conveying construction of conveying pump: When discharging materials, care should be taken to avoid direct impact on the basement exterior wall and supporting structure, and to protect the waterproof measures that have been set up; I. Vibration requirements: When the slump of the solidified soil is less than 150mm, a vibrating device should be used to vibrate it after filling to improve the compactness; the vibrating device can use a flat vibrator or an inserted vibrating rod; J. Prohibitions during pouring: It is strictly forbidden to add water during the pouring process to avoid affecting the strength and stability of the solidified soil; K. Severe weather response measures: In case of heavy rain or continuous drizzle, the unhardened surface of the fill should be covered and the opening of new working sections should be suspended to ensure construction safety and quality.

9. A method for construction of premixed fluidized solidified soil according to claim 8, characterized in that: The delivery pump (3) comprises a delivery pipe (301), and a delivery groove (302) is opened in the middle of the delivery pipe (301), a support plate (308) is fixedly provided at the lower part of one end of the delivery pipe (301), and a second motor (309) is fixedly provided on the top of the support plate (308), and a second rotating shaft (303) is coaxially fixed to the transmission shaft of the second motor (309) through a coupling, and the second rotating shaft (303) rotates and passes through the delivery pipe (301) to rotate and be fixed inside the other end of the delivery pipe (301), and the outer wall of the second rotating shaft (303) is arranged on the delivery pipe (301). A threaded conveying blade (304) is fixedly provided inside the tube (301); a second feed pipe (306) communicating with the conveying trough (302) is fixedly provided at one end of the top of the conveying tube (301) close to the second motor (309); a second discharge pipe (305) communicating with the conveying trough (302) is fixedly provided at one end of the lower part of the conveying tube (301) away from the second motor (309); a second reducer (310) is installed outside the conveying tube (301) on the outer wall of the second rotating shaft (303); and a connecting pipe (307) is detachably fixedly provided at the top of the second feed pipe (306).

10. The method for construction of premixed fluidized solidified soil according to claim 1, characterized in that In S6: A. After each layer or the top layer is filled, the solidified soil should be maintained; B. The curing of solidified soil can be done by watering or covering to keep it moist. When using plastic film for curing, the surface of the solidified soil should be covered tightly and condensed water should be kept inside the film. C. The curing time of the top layer of solidified soil shall not be less than 7 days.

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