Screw pile foundation based on urease bacterium reinforcement technology and construction method

Abstract

The invention provides a screw pile foundation based on urease bacterium reinforcement technology, which is characterized in that a grouting track which is spiral with a spiral wing plate is pre-arranged in the spiral wing plate of the screw pile, a grouting pipeline is fixed outside the screw pile, and a grouting outlet of the grouting pipeline is communicated with the grouting track in the spiral wing plate; the outer surface of the spiral wing plate is provided with a protruding structure capable of stretching or contracting, and an output opening communicated with the grouting track is formed in the protruding structure. And the spiral pile is connected with a grouting system outside the soil body, so that the cementing liquid and the soil body around the spiral pile form a reinforcing body. According to the spiral pile with the grouting function, the weak soil body around the spiral pile is reinforced through urease bacteria, the shearing strength of the soil body can be improved, the soil body is prevented from loosening and settling, the bonding force between soil and the pile is increased, the overall strength of the soil body is improved, and therefore the pulling resistance of the spiral pile is improved.

Description

Technical Field

[0001] The invention relates to the technical field of foundation reinforcement of civil engineering, and in particular to a screw pile foundation and a construction method based on urease bacteria reinforcement technology. Background Art

[0002] A screw pile is a spiral foundation made of steel or aluminum that is screwed into the soil mechanically or manually to secure the support brackets for the required equipment. Screw piles are usually suitable for softer soil layers. When encountering some deeper soft soil layers in the target operation area, the bearing capacity of the screw pile may be limited. Due to the limitation of the pile length and the deformation nature of the soil layer, the bearing capacity of the screw pile may not be sufficient to meet the design requirements.

[0003] In the above case, in addition to conventional foundation reinforcement technology, microbial grouting reinforcement technology can also be used to improve its bearing capacity and stability. Urease, as an alkaliphilic aerobic Gram-positive bacterium, can use urea as a raw material to hydrolyze NH 4+ and CO3 2- The urease cell wall can attract Ca in the nutrient solution. 2+ , causing them to aggregate outside bacterial cells. At the same time, urea hydrolysis inside the cells continuously generates CO3 2- When it moves to the cell surface, calcium carbonate crystals are generated around the bacteria to enhance soil strength. With the in-depth research on microbial reinforcement technology, microbial reinforcement technology has become mature, but when it is applied to spiral pile reinforcement construction projects, there are also many problems that need to be solved, especially how to quickly and effectively reduce the gap between the spiral pile and the surrounding soil through pouring, and ensure that the bearing capacity of the spiral pile will not be affected in engineering practice, and avoid loosening and settlement of the soil where the spiral pile is located.

[0004] Therefore, it is necessary to design a screw pile foundation and construction method based on urease bacteria reinforcement technology to solve the above-mentioned practical engineering problems and provide a feasible solution for the application of microbial grouting reinforcement technology in screw pile reinforcement. Summary of the invention

[0005] The first object of the present invention is to provide a screw pile foundation that can form an effective reinforcement body between the pile foundation and the surrounding soil. To this end, the present invention adopts the following technical solutions:

[0006] A helical pile foundation based on urease bacteria reinforcement technology, in which a grouting track in the same helical shape as the helical wing plate is pre-opened inside the helical wing plate of the helical pile. A grouting pipe is fixed outside the helical pile, and the grouting outlet of the grouting pipe is communicated with the grouting track in the helical wing plate. A protrusion structure that can be extended or contracted is arranged on the outer surface of the helical wing plate, and an output port communicated with the grouting track is arranged inside the protrusion structure; the helical pile is connected with a grouting system outside the soil body, and the grouting system injects a cementing liquid for microbial reinforcement into the grouting track through a grouting pipe connected to the grouting pipe. The protrusion structure can extend the range of the soil body covered by the cementing liquid, so that the cementing liquid forms a reinforced body with the soil around the helical pile.

[0007] Further: The output port of the protrusion structure is arranged in the top direction and / or the bottom direction of the axial direction of the helical pile.

[0008] Further: The protrusion structure includes a limiting base and an output part. The two ends of the limiting base are respectively connected to the helical wing plate and the output part, and an elastically telescopic middle section is arranged between the two ends of the limiting base; the output port is arranged on the output part, so that the cementing liquid can be transported outward through the limiting base and the output part.

[0009] Further: Blades that can cover the protrusion structure are arranged on the helical wing plate, and blade rotating shafts connected to the helical wing plate are arranged on the blades. The blades can be opened and closed around their circumferential directions through the blade rotating shafts. Correspondingly, the arrangement direction of the blade rotating shafts is perpendicular or parallel to the surface of the helical part of the helical wing plate where they are located, so that the blades are opened and closed in a state of fitting with the surface of the helical part where they are located around the blade rotating shafts or in a state of inclination.

[0010] Further: A circuit interface and a grouting pipe interface are arranged on the grouting pipe. A circuit connection section is jointly formed inside the grouting pipe and the helical wing plate, and the circuit connection section is arranged separately from the grouting track; a control element is arranged inside the helical wing plate of the blade rotating shaft, and the control element is electrically connected to the circuit connection section.

[0011] Further: A spring is arranged between the bottom end of the output part and the inner wall of the grouting track of the helical wing plate.

[0012] Further: The grouting system includes a slurry storage barrel and a grouting control device connected by a hose. A temperature control module is arranged inside the slurry storage barrel to ensure that the temperature of the urease bacteria - nutrient solution stored inside the slurry storage barrel is appropriate. A grouting module is arranged inside the grouting control device to control the grouting direction and grouting rate of the cementing liquid in the grouting pipe.

[0013] The second object of the present invention is to provide a construction method that is convenient for reinforcement construction during helical pile reinforcement. For this reason, the present invention adopts the following technical solutions:

[0014] A construction method for a screw pile foundation based on urease bacteria reinforcement technology includes the following steps:

[0015] S1: Prefabricate the screw pile with grouting function in the factory;

[0016] S2: Conduct a survey and leveling of the site, determine the location of poor geology, ensure the site is flat, use a screw drill to drill holes at the pile foundation location, ensure the closure of the protruding structure before screwing the screw pile into the ground; and after screwing the screw pile into the ground, open the blades so that the output part of the protruding structure can extend;

[0017] S3: Preparation of grouting materials: Prepare urease bacteria - nutrient solution, store it in a 4°C refrigerator and transport it to the project site, and conduct proportioning preparation and stirring to ensure the uniformity and quality of the materials. Pour the urease bacteria - nutrient solution into the slurry storage barrel, turn on the temperature control module and keep the solution at a constant temperature of 4 - 10°C;

[0018] S4: Connect the grouting pipe to the grouting pipeline, turn on the grouting control system to adjust the grouting parameters, and start grouting accordingly, while maintaining the continuity and uniformity of grouting;

[0019] S5: Repeat the grouting step until the required number of grouting times is met to form a reinforced body;

[0020] S6: After grouting is completed, wait for the reinforced body to take shape, and install the required support equipment on the upper part of the screw pile.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention uses urease bacteria through the screw pile with grouting function to reinforce the weak soil around the screw pile, which can improve the shear strength of the soil, prevent soil loosening and settlement, increase the bond strength between the soil and the pile, and improve the overall strength of the soil, thereby improving the uplift performance of the screw pile.

[0023] 2. The reinforcement of the screw pile of the present invention can be quickly constructed by mechanical equipment. Compared with the traditional concrete foundation reinforcement method, the construction period is shorter. This helps to improve the project progress and reduce construction time and costs.

[0024] 3. The screw pile of the present invention does not require the use of a large amount of building materials such as cement and sand and gravel during its reinforcement process, reducing the consumption of natural resources. At the same time, no waste and dust are generated during the screw pile reinforcement process, reducing environmental pollution.

[0025] 4. The grouting-functional helical pile reinforcement of the present invention is applicable to various geological conditions, including soft soil foundations, sandy lands, rocks, etc. The helical pile can adapt to different foundation requirements by adjusting the pile length and diameter to ensure the stability and safety of the upper support structure required.

[0026] 5. The grouting-functional helical pile of the present invention can improve the seismic performance of the upper support structure after reinforcement. Through its helical structure, the helical pile can better disperse seismic forces and transmit them to deeper soil layers, improving the overall stability of the foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the structure of the grouting system of the present invention;

[0029] Figure 3 It is a schematic diagram of the helical pile foundation of the present invention;

[0030] Figure 4 It is a schematic diagram of the blades and protruding structures on the helical wing plate of the present invention;

[0031] Figure 5 It is a schematic diagram after the protruding structure of the present invention is unfolded;

[0032] Figure 6 It is a schematic diagram of the grouting pipe interface and the line interface on the grouting pipeline of the present invention;

[0033] Figure 7 It is a schematic diagram of the first perspective of the grouting control device of the present invention;

[0034] Figure 8 It is a schematic diagram of the second perspective of the grouting control device of the present invention;

[0035] Figure 9 It is a schematic diagram of the structure of the reinforced body after the repair outside the helical pile of the present invention is completed.

[0036] The reference signs in the drawings are: 1 - grouting system, 11 - grouting pipe, 12 - slurry storage drum, 13 - temperature control button, 14 - grouting control device, 15 - grouting direction knob, 16 - grouting rate knob, 17 - first blade switch, 18 - second blade switch, 19 - gland, 110 - grouting control motor, 111 - roller, 112 - blade opening and closing motor 1, 113 - blade opening and closing motor 2, 2 - helical pile, 21 - grouting pipeline, 22 - blade, 23 - protruding structure, 231 - limit foundation, 232 - output part, 24 - helical wing plate, 25 - blade rotating shaft, 26 - line interface, 27 - grouting pipe interface, 3 - upper support and photovoltaic module, 4 - reinforced body. Detailed implementation mode

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but it shall not be used as the basis for restricting the present invention.

[0038] In this embodiment, taking the object acted on by the screw pile foundation based on the urease bacteria reinforcement technology as a photovoltaic support as an example, the following description will be given, but it is of course not limited thereto.

[0039] As Figures 1-9 shown, a screw pile foundation based on the urease bacteria reinforcement technology, a grouting track that is the same as the spiral wing plate 24 is pre-opened inside the spiral wing plate 24 of the screw pile 2. A grouting pipe 21 is fixed outside the screw pile 2. The grouting outlet of the grouting pipe 21 is communicated with the grouting track inside the spiral wing plate 24. An extendable or retractable protruding structure 23 is arranged on the outer surface of the spiral wing plate 24. An output port communicated with the grouting track is arranged inside the protruding structure 23; a grouting system 1 is connected and arranged outside the soil body of the screw pile. The grouting system 1 injects a cementing liquid for microbial reinforcement into the grouting track through a grouting pipe 11 connected to the grouting pipe 21. The protruding structure 23 can extend the range of the soil body covered by the cementing liquid, so that the cementing liquid forms a reinforced body 4 with the soil body around the screw pile 2.

[0040] In this embodiment, the protruding structure 23 shrinks inside the spiral wing plate 24 when the screw pile 2 has not been screwed into the ground to ensure that the protruding structure 23 does not affect the normal installation of the screw pile 2; after the screw pile 2 is screwed into the ground, due to the extension function of the protruding structure 23 itself, the screw pile 2 is urged to be in closer contact with the soft soil through the protruding structure 23.

[0041] Specifically, a plurality of protruding structures 23 are arranged and distributed on the upper surfaces of each spiral part of the spiral wing plate 24. The output port of the protruding structure 23 is preferably arranged in the top direction of the axial direction of the screw pile 2, so that the cementing liquid is output from above the spiral part of the spiral wing plate 24, and it can also avoid affecting the screwing of the screw pile 2 into the ground without setting an opening and closing structure.

[0042] Specifically, the protruding structure 23 includes a limiting base 231 and an output part 232, and both the limiting base 231 and the output part 232 after expansion are in the shape of a frustum of a cone; both ends of the limiting base 231 are respectively connected to the spiral wing plate 24 and the output part 232, and an elastic middle section is arranged between both ends of the limiting base 231. The middle section can be extended by the cementing liquid during grouting; the output port is arranged on the output part 232, so that the cementing liquid can be transported outward through the limiting base 231 and the output part 232.

[0043] In this embodiment, to ensure that the protruding structure 23 is smoothly embedded in the soil, an opening and closing structure is provided for the protruding structure 23 on the helical vane 24; the opening and closing structure includes a blade 22 provided on the helical vane 24 that can cover the protruding structure 23, and a blade rotating shaft 25 is provided on the blade 22 and connected to the helical vane 24. The blade rotating shaft 25 is perpendicular to the surface of the helical part of the helical vane 24 where it is located, so that the blade 22 rotates around the blade rotating shaft 25 and is in a fitting state with the surface of the helical part where it is located for opening and closing.

[0044] Among them, a line interface 26 and a grouting pipe interface 27 are provided on the grouting pipe 21. The grouting pipe 21 and the helical vane 24 together form a line connection section, and the line connection section is arranged separately from the grouting track; a control element is provided inside the helical vane 24 on the blade rotating shaft 25, and the control element is electrically connected to the line connection section.

[0045] Among them, the control element can use a motor connected to the blade rotating shaft 25 through an electric wire. The arrangement of the electric wire is as follows: the electric wire is sequentially led out from the motor and the grouting control system 14, and after being led out, the electric wire is wound around the grouting pipe 11 until the grouting pipe 21. The electric wire led out from the grouting control system 14 and the grouting pipe 11 are fixed to the line interface 26 through a connector and extend into the line connection section of the grouting pipe 21 and the helical vane 24 through the line interface 26.

[0046] At the same time, a spring (not marked in the figure) is provided between the bottom end of the output part 232 of the protruding structure 23 and the inner wall of the grouting track of the helical vane 24. The compressed spring can restore its elastic force when the blade 22 is opened, so that the spring accelerates the extension effect of the output part 232 extending into the soil and further ensures the effective formation of the subsequent solidified body 4.

[0047] In this embodiment, the process of culturing the bacterial medium is as follows: When culturing bacteria, urease is used, which is derived from Bacillus pasteurii. The culturing process is as follows:

[0048] (1) Prepare a bacteria-urea mixture. The culture medium is composed of 20 g / L yeast extract, 15 g / L NH4Cl, and 0.1 mmol / L NiCl2 respectively. After dissolution, its pH is adjusted to 9.25 with 10 mol / L NaOH. The bacteria complete growth after being placed in a shaker for 48 hours, and then the bacteria are taken out of the shaker. The bacteria, deionized water, and 4 mol / L urea are fully mixed under the condition of a volume ratio of 1:4:5 to obtain a bacteria-urea mixture with a urea concentration of 2 mol / L;

[0049] (2) Prepare the nutrient solution: To prepare 1 liter of 2 mol / L CaCl2 and urea solution: 89 g of anhydrous calcium chloride is required; 45.4 g of magnesium chloride pentahydrate is required. 6 g of urea is required; the solution is mixed evenly, and the resulting solution is the 2 mol / L nutrient solution;

[0050] (3) Mix the bacteria-urea mixture with the nutrient solution to obtain a 1 mol / L urease bacteria-nutrient solution.

[0051] Correspondingly, the cementing solution has the optimal performance at about 10°C. To ensure the cementing performance, the grouting system 1 needs to have a temperature regulation function and be kept at a constant temperature of 10°C.

[0052] As Figures 1-9 shown, this embodiment also provides a grouting system. Bolts and other connectors are used to fix the upper bracket and the photovoltaic module 3 on the screw pile 2 with grouting function. The grouting system 1 is connected to the screw pile 2 with grouting function through the grouting pipe 11. This improves the efficiency of grouting construction and solves the construction problem of using urease bacteria hydrolysis reinforcement technology to reinforce the screw pile foundation.

[0053] The grouting system 1 includes a slurry storage barrel 12 and a grouting control device 14 connected by a hose. The slurry storage barrel 12 is a sealed barrel and a temperature control module is provided therein to ensure that the temperature of the urease bacteria-nutrient solution stored inside the slurry storage barrel 12 is appropriate and to ensure that the activity of the urease bacteria-nutrient solution is relatively high. A grouting module is provided inside the grouting control device 14 to control the grouting direction and grouting rate of the cementing liquid in the grouting pipe 11.

[0054] In this embodiment, the temperature control module of the slurry storage barrel 12 realizes temperature control through temperature control equipment and in cooperation with the temperature control button 13. The control button 13 is functionally set as a heating button, a refrigeration button, and a constant temperature button to ensure that the urease bacteria-nutrient solution is kept at a constant temperature of 10°C.

[0055] Among them, the lower part of the slurry storage barrel 12 is equipped with rollers to facilitate the movement of the position during construction.

[0056] In this embodiment, the grouting control system 14 can control the urease bacteria-nutrient solution to be pressed out from the slurry storage barrel 12 through the control equipment, injected into the soil through the grouting pipeline 21, and control the grouting parameters. For this purpose, a grouting direction knob 15, a grouting rate knob 16, a first blade switch 17, and a second blade switch 18 are respectively provided. The grouting control system 14 can adjust the grouting direction to inject into the soil and suck the slurry back through the grouting direction knob 15; the grouting rate can be controlled by the grouting rate knob 16; the grouting direction knob 15 and the grouting rate knob 16 realize the control of the grouting direction and grouting rate through the grouting control motor 110, the gland 19, and the roller 111.

[0057] Among them, the gland 19 and the rollers 111 clamp the pipe section used for grouting. The pipe section used for grouting between the two rollers 111 presents a pillow shape. When the rollers 111 rotate, the elastic grouting pipe 11 will be alternately squeezed and released to pump the cementitious liquid. And as the rollers 111 roll, the elasticity of the pipe section used for grouting will cause the pump pipe to continuously return to its original shape, forming a negative pressure at the pump inlet, promoting the flow of the cementitious liquid and filling the pipeline, achieving the purpose of transmission. The rolling speed and direction of the rollers 111 are controlled by the grouting control motor 110 to control the grouting direction and grouting rate.

[0058] Meanwhile, the above control components are connected to the first vane switch 17 and the second vane switch 18 through wires, so that the first vane switch 17 and the second vane switch 18 respectively control the clockwise and counterclockwise rotation of the vane rotating shaft 25, thereby driving the vane 22 to rotate and open.

[0059] In this embodiment, to ensure better heat insulation of the pipeline, the grouting pipe 11 is made of rubber, and the rubber hose is wrapped with a heat shrinkable sleeve on the outside. The heat shrinkable sleeve is put on the rubber hose, and then heated with a heat source such as a flame or a hot air gun to make it shrink and tightly fit the surface of the hose, forming a heat preservation layer. At the same time, both ends of the grouting pipe 11 are steel threaded knobs, and the outer part of the middle section of the round pipe is the rubber hose provided with the heat shrinkable sleeve, which is used to connect each grouting component and the grouting pipeline 21. Among them, the grouting pipe 11 is divided into two sections. One section is connected to the top of the grouting pipeline 21 and the slurry outlet of the grouting control system 14 at both ends respectively; and the other section is connected to the inlet of the grouting control system 14 and the slurry storage barrel 12 at both ends respectively.

[0060] Correspondingly, when connecting the grouting control system 14 to the bolt piles 2 at each geological weak point, a branch pipe device should be set for the grouting pipe 11 at the slurry outlet of the grouting control system 14, so that the urease bacteria - nutrient solution can smoothly flow into each bolt pile 2 after being sent out from the grouting control system 14.

[0061] Please refer to Figures 1-9 , when installing and reinforcing the spiral pile foundation with grouting function, the specific steps are as follows:

[0062] S1: Prefabricate the spiral pile 2 with grouting function in the factory, pay attention to protecting the grouting port, and do not block the pipeline;

[0063] S2: Conduct a survey and leveling of the site, determine the locations with poor geology, ensure the site is flat, clear away obstacles, and use a screw drill to drill holes at the pile foundation locations. The depth of the screw pile 2 is determined according to soil conditions, design requirements, and wind load requirements of the geographical location; ensure that the blades 22 are closed to the protruding structure 23 before screwing the screw pile 2 into the ground; and after screwing the screw pile 2 into the ground, open the blades 22 by controlling the first blade switch 17 or the second blade switch 18 so that the output part 232 of the protruding structure 23 extends.

[0064] S3: Preparation of grouting materials: Prepare urease bacteria - nutrient solution, store it in a 4°C refrigerator and transport it to the project site. Place the grouting materials and prepare and mix them according to the usage instructions and proportion requirements of the grouting materials to ensure the uniformity and quality of the materials. Pour the urease bacteria - nutrient solution into the slurry storage barrel 12, turn on the temperature control button 13 and keep the solution at a constant temperature of about 10°C.

[0065] S4: Connect the grouting pipe 11 to the grouting pipeline 21, turn on the grouting control system 14 and adjust the grouting parameters so that the urease bacteria - nutrient solution smoothly flows into the grouting pipelines 21 of each screw pile 2 at the geologically weak points after being sent out from the grouting control system 14, and the solution is discharged from the outlet of the protruding structure 23 through the grouting tracks in the grouting pipeline 21 and the spiral wing plates 24, while maintaining the continuity and uniformity of grouting.

[0066] S5: Repeat the grouting steps 7 - 8 times to gradually increase the strength and stability of the screw pile 2 and the soil until the requirements for the designed number of grouting times are met, and thus form the reinforced body 4.

[0067] S6: After the grouting is completed, wait for the reinforced body 4 to take shape, and then install the upper bracket and the photovoltaic module 3 on the upper part of the screw pile 2: Install the bracket on the top of the screw pile 2. According to the design requirements, use bolts or other connecting parts to fix the bracket on the screw pile 2; install the photovoltaic module on the bracket, and use the fixing clamps or other installation systems on the bracket to fix the photovoltaic module on the bracket.

[0068] S7: Connect the cables between the photovoltaic modules and connect the cables to an inverter or other power equipment; ensure the safe connection and insulation of the cables, and ensure that the position and angle of the photovoltaic modules meet the design requirements so that the photovoltaic system works properly.

[0069] The above embodiments are only a relatively optimal technical solution of the present invention. Those skilled in the art should understand that without departing from the principles and essence of the present invention, modifications or replacements can be made to the technical solutions or parameters in the embodiments, and all should be covered within the protection scope of the present invention.

Claims

1. A helical pile foundation based on urease bacteria reinforcement technology, characterized in that: The screw pile (2) is pre - provided with a grouting track which is helical like the helical blade (24) inside the helical blade (24). A grouting pipe (21) is fixed outside the screw pile (2). The grouting outlet of the grouting pipe (21) is communicated with the grouting track in the helical blade (24). A protrusion structure (23) which can be extended or contracted is arranged on the outer surface of the helical blade (24), and an output port communicated with the grouting track is arranged in the protrusion structure (23). The screw pile is connected with a grouting system (1) outside the soil body. The grouting system (1) injects a cementing liquid for microbial reinforcement into the grouting track through a grouting pipe (11) connected to the grouting pipe (21). The protrusion structure (23) can extend the range of the soil body covered by the cementing liquid, so that the cementing liquid forms a reinforced body (4) with the soil around the screw pile (2).

2. The helical pile foundation based on the urease bacteria reinforcement technology according to claim 1, characterized in that: The output port of the protrusion structure (23) is arranged towards the top direction and / or the bottom direction of the axial direction of the screw pile (2).

3. The helical pile foundation based on the urease bacteria reinforcement technology according to claim 1, wherein: The protrusion structure (23) includes a limit base (231) and an output part (232). The two ends of the limit base (231) are respectively connected with the helical blade (24) and the output part (232), and an elastically telescopic middle section is arranged between the two ends of the limit base (231). The output port is arranged on the output part (232) so that the cementing liquid can be conveyed outwards through the limit base (231) and the output part (232).

4. A helical pile foundation based on urease bacteria reinforcement technology according to claim 2, characterized in that: A blade (22) which can cover the protrusion structure (23) is arranged on the helical blade (24), and a blade rotating shaft (25) connected with the helical blade (24) is arranged on the blade (22).

5. A helical pile foundation based on urease bacteria reinforcement technology according to claim 4, characterized in that: A line interface (26) and a grouting pipe interface (27) are arranged on the grouting pipe (21). A line connection section is jointly formed inside the grouting pipe (21) and the helical blade (24), and the line connection section is arranged separately from the grouting track. A control element is arranged inside the helical blade (24) of the blade rotating shaft (25), and the control element is electrically connected with the line connection section.

6. The helical pile foundation based on the urease bacteria reinforcement technology according to claim 3, characterized in that: A spring is arranged between the bottom end of the output part (232) and the inner wall of the grouting track of the helical blade (24).

7. A helical pile foundation based on urease bacteria reinforcement technology according to claim 1, characterized in that: The grouting system (1) includes a slurry storage barrel (12) and a grouting control device (14) connected by a hose. A temperature control module is arranged inside the slurry storage barrel (12) to ensure that the temperature of the urease bacteria - nutrient solution stored inside the slurry storage barrel (12) is appropriate. A grouting module is arranged inside the grouting control device (14) to control the grouting direction and grouting rate of the cementing liquid in the grouting pipe (11).

8. A construction method for a screw pile foundation based on urease bacteria reinforcement technology, characterized in that: Using a screw pile foundation based on urease bacteria reinforcement technology as described in any one of claims 1 - 7 for construction, includes the following steps: S1: Prefabricate the screw pile (2) with grouting function in the factory; S2: Conduct a survey and leveling of the site to determine the locations with poor geology, ensure the site is flat, drill holes at the pile foundation locations using a spiral drill rig, and ensure the closure of the protruding structure (23) before screwing the screw pile (2) into the ground; and after screwing the screw pile (2) into the ground, open the blades (22) so that the output part (232) of the protruding structure (23) extends. S3: Preparation of grouting materials: Prepare urease bacteria - nutrient solution, store it in a 4°C refrigerator and transport it to the project site, and carry out proportioning preparation and stirring to ensure the uniformity and quality of the materials. Pour the urease bacteria - nutrient solution into the slurry storage barrel (12), turn on the temperature control module and keep the solution at a constant temperature of 4 - 10°C. S4: Connect the grouting pipe (11) to the grouting pipeline (21), turn on the grouting control system (14) to adjust the grouting parameters, and start grouting accordingly, while maintaining the continuity and uniformity of grouting. S5: Repeat the grouting steps until the requirements for the designed number of grouting times are met to form a solidified body (4). S6: After grouting is completed, wait for the solidified body (4) to take shape, and install the required support equipment on the upper part of the screw pile (2).

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