A pile foundation mud preparation system and construction method

Abstract

This invention provides a pile foundation mud preparation system and construction method, belonging to the field of building construction. The technical solution includes a mud tank, a mud preparation system used in conjunction with the mud tank, a drilling mud circulation system, and a hole cleaning mud circulation system. The beneficial effects of this invention are: the mud preparation component uses self-circulation for rapid mud mixing, resulting in uniform, fast, and high-quality mud preparation; the mud properties can be adjusted at any time by changing the amount of materials added; and sampling and testing can be performed at different locations.

Description

Technical Field

[0001] This invention relates to the field of building construction, and in particular to a pile foundation mud preparation system and construction method. Background Technology

[0002] Currently, bored piles have become the most common building structure foundations, suitable for various geological conditions and developing towards ultra-long and ultra-large sizes. The mud used in pile foundation construction needs to be mixed with materials such as water, clay (bentonite), and additives. With the increasing complexity of special geological conditions and the increasing volume of single piles, the performance and quality requirements of the mud used are becoming increasingly stringent.

[0003] During construction, mud pits are usually set up on-site by digging pits. After filling the pits with water, clay (bentonite) and additives are added and mechanically mixed with an excavator or diluted and dissolved by continuous water injection. This mud preparation method has problems such as occupying land resources, damaging the construction environment, uneven mud mixing and unstable performance, easy material waste, and poor mud quality. In addition, mud is used in the pile foundation drilling and cleaning process. The mud preparation → drilling → cleaning process requires multiple laying of delivery pipelines, which involves repeated moving and connecting of pipelines, a large amount of physical labor in preparation, frequent pipeline damage affecting construction, mud spillage polluting the environment, and poor on-site construction. When using mud, it is necessary to frequently check whether the mud index quality meets the usage requirements and adjust the mud performance at any time according to the test results. At present, mud testing is mostly carried out by taking mud from the pile foundation hole or mud pool. This has problems such as needing to stop the machine and wait during testing, risk of slippage, unrepresentative mud sampling location, and inability to adjust mud performance at any time.

[0004] In summary, existing methods for preparing, using, and testing mud all have varying degrees of problems regarding economy, practicality, and applicability, and pose safety hazards, directly affecting the quality of pile foundation construction. Summary of the Invention

[0005] The purpose of this invention is to provide a pile foundation mud preparation system and construction method that uses a mud preparation component to self-circulate and rapidly mix mud, resulting in uniform mud preparation, high speed, and high quality. At the same time, the mud properties can be adjusted at any time by adjusting the amount of materials added, and sampling and testing can be carried out at different locations.

[0006] This invention is achieved through the following measures: A pile foundation mud preparation system, characterized in that it includes a mud tank, a mud preparation system used in conjunction with the mud tank, a drilling mud circulation system, and a hole cleaning mud circulation system; The mud tank is equipped with a partition wall, which divides the interior of the mud tank into a sedimentation tank and a pulping tank. The mud preparation system includes a clean water well, a clean water pump installed in the clean water well, and the clean water pump connected to the inside of the mud preparation tank via a clean water pipeline. A first mud pump is installed in the mud preparation tank, and a first mud discharge pipeline is installed at the discharge end of the first mud pump. A three-way valve is installed at the free end of the first mud discharge pipeline. One end of the three-way valve is connected to a mud preparation component via a second mud discharge pipeline. The discharge end of the mud preparation component is connected to the inside of the mud preparation tank. The drilling mud circulation system mainly includes a third mud outlet pipeline located at the other end of the three-way valve, the three-way valve, the first mud outlet pipeline, and the first mud pump. The hole cleaning mud circulation system includes a second mud pump and a mud-sand separator. The feed end of the mud-sand separator is connected to the second mud pump, and the discharge end of the mud-sand separator is connected to the interior of the sedimentation tank.

[0007] The invention also has the following specific features: The mud preparation assembly includes a mobile vehicle equipped with a mud hopper. A lower pipe communicating with the interior of the mud hopper is located at the bottom of the mud hopper. The inlet end of the lower pipe is connected to the second slurry outlet pipe, and the outlet end of the lower pipe is connected to the interior of the slurry preparation tank.

[0008] A drive motor is installed at the bottom of the mud hopper, and the motor shaft of the drive motor passes through the side wall of the mud hopper and is located inside the mud hopper. The stirring spiral is installed inside the mud hopper, and the filter screen is installed at the top of the mud storage hopper.

[0009] The mud tank is made of steel, and the partition wall is installed at 1 / 3 of the mud tank.

[0010] Preferably, the inlet of the clean water well and the inlet of the mud preparation device are set diagonally opposite each other, so that the mud and clean water are automatically mixed.

[0011] The mud hopper is made of Q235B steel with a thickness of 2mm. It is in the shape of an inverted trapezoid with an upper opening size of 50cm×50cm, a lower opening size of 8cm×8cm, and a height of 50cm. The lower opening is welded to the lower pipe as a whole.

[0012] The filter screen is made of Q235B steel with a mesh size of 1cm×1cm. The filter screen is welded and fixed to the mud hopper with 2mm steel plates around its perimeter.

[0013] The construction method includes the following steps: S1. The clean water is pumped through the clean water pipeline to the pulping tank; S2. Close the three-way valve switch between the first slurry outlet pipe and the third slurry outlet pipe. Use the first mud pump to transport the clean water in the slurry preparation tank to the mud preparation component through the first slurry outlet pipe and the second slurry outlet pipe. At the same time, pour the bentonite into the mud hopper (10) through the filter screen (12). The clumps filtered out by the filter screen (12) are removed from the site. S3. Start the stirring screw (11) to stir the bentonite and the water pump. When the water level in the slurry tank is 20cm away from the top of the partition wall, turn off the water pump and continue to start the first mud pump to add a certain amount of bentonite. At the same time, stir and slurry through the stirring screw. S4. After the mud has circulated for a period of time, the mud index of the drilling process is tested through the drilling mud test port (18). After the mud index meets the requirements, the three-way valve switch between the first slurry outlet pipe and the second slurry outlet pipe is closed, and the three-way valve switch between the first slurry outlet pipe and the third slurry outlet pipe is opened. The mud is transported to the pile hole through the pipeline for mud wall protection. S5. After the pile foundation is drilled, the cleaning mud is transported to the mud-sand separator (15) by the second mud pump for mud-sand separation. The mud flows into the sedimentation tank (16), and the drill cuttings are removed from the site. After sedimentation in the sedimentation tank (16), the mud flows into the slurry preparation tank (17) for continued recycling. If the mud is insufficient, repeat steps S1-S3 to prepare the slurry. S6. Test the mud index during the hole cleaning process. After the mud index meets the requirements, concrete is poured. Preferably, a three-way valve is installed on the pipeline connecting the feed end of the mud separator and the second mud pump, which can be used to extract mud during the hole cleaning process.

[0014] The beneficial effects of this invention are as follows: the mud preparation component is used to rapidly mix mud through self-circulation, resulting in uniform mud preparation, fast speed, and high quality. At the same time, the mud properties can be adjusted at any time by adjusting the amount of material added, and sampling and testing can be carried out at different locations. This invention uses a dedicated mud preparation device for mud preparation. It features self-circulating and rapid mixing, resulting in uniform, fast, and high-quality mud preparation. The mud properties can be adjusted at any time by adjusting the amount of materials added. This invention can replace the time-consuming and labor-intensive traditional mud preparation methods, saving time. The present invention features a rational layout of mud mixing and conveying pipelines, enabling switching between different processes such as mud preparation, hole forming, and hole cleaning via switches and valves, thereby reducing labor requirements; This invention rationally sets up a three-way switch to fix the mud index detection position, so that the mud performance and quality can be detected at any time during mixing or use, eliminating the safety hazards of sampling at the pile hole location. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the structure of an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the mud preparation component in an embodiment of the present invention.

[0017] The attached diagram is labeled as follows: 5. Three-way valve; 6. Clear water well; 7. Mud tank; 8. First mud pump; 9. Mud preparation assembly; 10. Mud hopper; 11. Agitator screw; 12. Filter screen; 13. Mobile vehicle; 15. Sediment separator; 16. Sedimentation tank; 17. Slurry preparation tank; 18. First slurry outlet pipeline; 19. Clear water pump; 20. Second slurry outlet pipeline; 21. Third slurry outlet pipeline; 22. Second mud pump; 23. Clear water pipeline. Detailed Implementation

[0018] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0019] See Figure 1 and 2 A pile foundation mud preparation system includes a mud tank 7, a mud preparation system used in conjunction with the mud tank 7, a hole-forming mud circulation system, and a hole-cleaning mud circulation system. The mud tank 7 is equipped with a partition wall, which divides the interior of the mud tank 7 into a sedimentation tank 16 and a pulping tank 17. The mud preparation system includes a clean water well 6, which is equipped with a clean water pump 19. The clean water pump 19 is connected to the inside of the mud preparation tank 17 via a clean water pipeline 23. The mud preparation tank 17 is equipped with a first mud pump 8. The discharge end of the first mud pump 8 is equipped with a first mud discharge pipeline 18. The free end of the first mud discharge pipeline 18 is equipped with a three-way valve 5. One end of the three-way valve 5 is connected to the mud preparation component 9 via a second mud discharge pipeline 20. The discharge end of the mud preparation component 9 is connected to the inside of the mud preparation tank 17. The drilling mud circulation system mainly includes a third mud outlet pipe 21 located at the other end of the three-way valve 5, the three-way valve 5, the first mud outlet pipe 18, and the first mud pump 8; The hole cleaning mud circulation system includes a second mud pump 22 and a mud-sand separator 15. The feed end of the mud-sand separator 15 is connected to the second mud pump 22, and the discharge end of the mud-sand separator 15 is connected to the interior of the sedimentation tank 16.

[0020] The mud preparation component 9 includes a mobile vehicle 13, on which a mud hopper 10 is provided. A lower pipe communicating with the inside of the mud hopper 10 is provided at the bottom of the mud hopper 10. The inlet end of the lower pipe is connected to the second slurry outlet pipe 20, and the outlet end of the lower pipe is connected to the inside of the slurry preparation box 17.

[0021] A drive motor is installed at the bottom of the mud hopper 10. The end of the motor shaft of the drive motor passes through the side wall of the mud hopper 10 and is located inside the mud hopper 10. An agitator 11 is installed therein. A filter screen 12 is installed at the top of the mud storage hopper.

[0022] The mud tank 7 is made of steel, and a partition wall is installed at 1 / 3 of the mud tank 7.

[0023] Preferably, the inlet of the clean water well 6 is diagonally opposite to the mud inlet in the mud preparation device, so that the mud and clean water are automatically mixed.

[0024] The mud hopper 10 is made of Q235B steel with a thickness of 2mm. It is in the shape of an inverted trapezoid with an upper opening size of 50cm×50cm, a lower opening size of 8cm×8cm, and a height of 50cm. The lower opening is welded to the lower pipe as a whole.

[0025] The filter screen 12 is made of Q235B steel with a mesh size of 1cm×1cm. The filter screen 12 is welded and fixed to the mud hopper 10 with 2mm steel plates around its perimeter.

[0026] The construction method includes the following steps: S1. Clean water is pumped by clean water pump 19 and transported to pulping tank 17 through clean water pipeline 23; S2. Close the three-way valve 5 between the first slurry outlet pipe 18 and the third slurry outlet pipe 21. Use the first mud pump 8 to transport the clean water in the slurry preparation tank 17 to the mud preparation component 9 through the first slurry outlet pipe 18 and the second slurry outlet pipe. At the same time, pour the bentonite into the mud hopper 10 (10) through the filter screen 12 (12). The clumps filtered out by the filter screen 12 (12) are removed from the site. S3. Start the mixing screw 11 (11) to mix the bentonite and the water pump. When the water level in the slurry tank 17 is 20cm away from the top of the partition wall, turn off the water pump 19 and continue to start it. First mud pump 8: Add a certain amount of bentonite and mix the slurry through the mixing screw 11. S4. After the mud has circulated for a period of time, the mud index of the drilling process is tested through the drilling mud test port (18). After the mud index meets the requirements, the three-way valve 5 between the first slurry outlet pipe 18 and the second slurry outlet pipe 20 is closed, and the three-way valve 5 between the first slurry outlet pipe 18 and the third slurry outlet pipe 21 is opened. The mud is transported to the pile hole through the pipeline for mud wall protection. S5. After the pile foundation is drilled, the cleaning mud is transported to the mud-sand separator 15 (15) by the second mud pump 22 for mud-sand separation. The mud flows into the sedimentation tank 16 (16), the drill cuttings are removed from the site, and the mud flows into the slurry preparation tank 17 (17) after sedimentation in the sedimentation tank 16 (16) for continued recycling. If the mud is insufficient, repeat steps S1-S3 to prepare the slurry. S6. Test the mud index during the hole cleaning process. After the mud index meets the requirements, concrete is poured. Preferably, a three-way valve 5 is installed on the pipeline connecting the feed end of the mud separator 15 and the second mud pump 22, which can be used to extract mud during the hole cleaning process.

[0027] The technical features of this invention not described can be implemented by or using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this invention, and this invention is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention should also be within the protection scope of this invention.

Claims

1. A pile foundation slurry preparation system, characterized by, Includes a mud tank, a mud preparation system used in conjunction with the mud tank, a drilling mud circulation system, and a hole cleaning mud circulation system; The mud tank is equipped with a partition wall, which divides the interior of the mud tank into a sedimentation tank and a pulping tank. The mud preparation system includes a clean water well, a clean water pump installed in the clean water well, the clean water pump being connected to the inside of the mud preparation tank via a clean water pipeline, a first mud pump installed in the mud preparation tank, a first mud discharge pipeline installed at the discharge end of the first mud pump, a three-way valve installed at the free end of the first mud discharge pipeline, one end of the three-way valve being connected to the mud preparation component via a second mud discharge pipeline, and the discharge end of the mud preparation component being connected to the inside of the mud preparation tank; The mud preparation assembly includes a mobile vehicle equipped with a mud hopper. A lower pipe communicating with the interior of the mud hopper is provided at the bottom of the mud hopper. The inlet end of the lower pipe is connected to the second slurry outlet pipe, and the outlet end of the lower pipe is connected to the interior of the slurry preparation tank. A drive motor is installed at the bottom of the mud hopper, and the end of the motor shaft of the drive motor passes through the side wall of the mud hopper and is located inside the mud hopper. A stirring spiral is also provided. A filter screen is provided at the top of the mud hopper. The drilling mud circulation system includes a third mud outlet pipeline located at the other end of the three-way valve, the three-way valve, the first mud outlet pipeline, and the first mud pump. The three-way valve is used to close the passage between the first slurry outlet pipe and the third slurry outlet pipe during pulping, so that the first mud pump can transport the clean water in the pulping tank to the mud preparation component through the first slurry outlet pipe and the second slurry outlet pipe. The three-way valve is also used to close the passage between the first slurry outlet pipe and the second slurry outlet pipe and open the passage between the first slurry outlet pipe and the third slurry outlet pipe after the mud index meets the requirements during the drilling process, so that the mud can be transported to the pile hole through the pipe for mud wall protection. The hole cleaning mud circulation system includes a second mud pump and a mud-sand separator. The feed end of the mud-sand separator is connected to the second mud pump, and the discharge end of the mud-sand separator is connected to the inside of the sedimentation tank. A three-way valve is installed on the pipe connecting the feed end of the mud-sand separator to the second mud pump. The three-way valve is used to extract mud during the hole cleaning process.

2. A pile foundation slurry preparation system according to claim 1, characterized in that, The mud tank is made of steel, and the partition wall is installed at 1 / 3 of the mud tank.

3. The pile foundation mud preparation system according to claim 1, characterized in that, The inlet of the clear water well is diagonally positioned opposite the inlet of the mud preparation device, so that the mud and clear water are automatically mixed.

4. The pile foundation mud preparation system according to claim 1, characterized in that, The mud hopper is made of Q235B steel with a thickness of 2mm. It is in the shape of an inverted trapezoid with an upper opening size of 50cm×50cm, a lower opening size of 8cm×8cm, and a height of 50cm. The lower opening is welded to the lower pipe as a whole. The filter screen is made of Q235B steel with a mesh size of 1cm×1cm. The filter screen is welded and fixed to the mud hopper with 2mm steel plates around its perimeter.

5. A construction method using the pile foundation mud preparation system according to any one of claims 1-4, characterized in that, Includes the following steps: S1. The clean water is pumped through the clean water pipeline to the pulping tank; S2. Close the three-way valve switch between the first slurry outlet pipeline and the third slurry outlet pipeline. Use the first mud pump to transport the clean water in the slurry preparation tank to the mud preparation component through the first slurry outlet pipeline and the second slurry outlet pipeline. At the same time, pour the bentonite into the mud hopper through the filter screen. Remove the clumps filtered out by the filter screen from the site. S3. Start the stirring screw to stir the bentonite and water. When the water level in the slurry tank is 20cm away from the top of the partition wall, turn off the water pump, continue to start the first mud pump, add a certain amount of bentonite, and stir and slurry through the stirring screw at the same time. S4. After the mud has circulated for a period of time, the mud index of the drilling process is tested through the drilling mud test port. After the mud index meets the requirements, the three-way valve switch between the first mud outlet pipeline and the second mud outlet pipeline is closed, and the three-way valve switch between the first mud outlet pipeline and the third mud outlet pipeline is opened. The mud is transported to the pile hole through the pipeline for mud wall protection. S5. After the pile foundation hole is formed, the cleaning mud is transported to the mud-sand separator by the second mud pump for mud-sand separation. The mud flows into the sedimentation tank, and the drill cuttings are removed from the site. After sedimentation in the sedimentation tank, the mud flows into the slurry preparation tank for continued recycling. If the mud is insufficient, repeat steps S1-S3 to prepare slurry. S6. Extract the mud during the hole cleaning process through the three-way valve on the pipeline connected to the second mud pump at the feed end of the mud separator, and test the mud index during the hole cleaning process. After the mud index meets the requirements, concrete is poured.

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