A mud-jacketed cast-in-place pile air-lifting reverse circulation hole cleaning device
Patent Information
- Application Number
- CN202522496200.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-25
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-25
AI Technical Summary
[0004]本实用新型针对现有技术中清孔方法包括正循环或反循环清孔，以及利用掏泥桶手工作业清孔，这些方法在清孔效果上不尽如人意，不能充分清除孔底沉渣，从而严重影响桩承载力的发挥，并且清孔所需时间较长，从而延长施工周期，进而显著增加项目的成本的问题，提出如下技术方案：
能够采用气举反循环将孔底沉渣有效抽出，可以显著提高钻孔的清孔效率，从而确保后续施工的顺利进行，还可以实现携渣流体中沉渣与泥浆的有效分离，并且分离后的洁净泥浆通过泥浆排管回灌至钻孔，大大减少泥浆的外排量和新鲜泥浆的制备量，进而有效实现资源的重复利用。
Smart Images
Figure CN224834951U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of building construction technology, and in particular relates to a mud-wall-protected bored pile air-lift reverse circulation hole cleaning device. Background Technology
[0002] In the construction field, bored piles, as a type of pile foundation that is highly efficient and stable, have been widely used in various building structures. The design of bored piles can be selected as friction type or end-bearing type as needed. Its core advantage lies in its ability to form a tight connection between the concrete pile body and the stratum. However, before concrete pouring, the thickness of the sediment at the bottom of the hole has a decisive influence on its bearing capacity. Therefore, the hole cleaning process has become a crucial step in the construction of bored piles.
[0003] However, existing hole cleaning methods, including forward or reverse circulation cleaning and manual cleaning using a mud bucket, are not satisfactory in terms of cleaning effect. They cannot fully remove the sediment at the bottom of the hole, which seriously affects the bearing capacity of the pile. In addition, the hole cleaning time is long, which prolongs the construction period and thus significantly increases the project cost. Utility Model Content
[0004] This utility model addresses the problem that existing hole cleaning methods, including forward or reverse circulation cleaning and manual cleaning using shovels, are unsatisfactory in their cleaning effect. These methods fail to fully remove sediment from the bottom of the hole, severely impacting the pile's bearing capacity. Furthermore, the long cleaning time extends the construction period and significantly increases project costs. The following technical solution is proposed: A mud-wall borehole cleaning device for cast-in-place piles using air lift reverse circulation includes: Frame for supporting the air-lift reverse circulation hole cleaning device for mud-wall borehole grouting piles; An air compressor is mounted on the frame. The air pipe is connected to the air compressor; The hole cleaning assembly includes a first guide tube, a second guide tube, bolts, nuts, an anti-clogging slag suction component, and a slurry discharge pipe. The first guide tube is connected to the frame, the second guide tube is disposed in the first guide tube, the bolt is inserted into the first guide tube, the bolt is inserted into the second guide tube, the nut is connected to the bolt, the anti-clogging slag suction component is disposed in the second guide tube, and the slurry discharge pipe is connected to the first guide tube.
[0005] Preferably, the system further includes a slurry separation component, which includes a separation chamber, a filter element, a sediment discharge pipe, a guide element, and a mud discharge pipe. The separation chamber is connected to the slurry discharge pipe, the filter element is disposed in the separation chamber, the sediment discharge pipe is connected to the separation chamber, the guide element is disposed in the separation chamber, and the mud discharge pipe is connected to the separation chamber.
[0006] Preferably, the trachea is located inside the first catheter, and the center of the trachea and the center of the first catheter are on the same vertical line.
[0007] Preferably, the second catheter is located below the first catheter, and the second catheter is configured corresponding to the first catheter.
[0008] Preferably, the filter element is located below the slurry discharge pipe, and the sludge discharge pipe is correspondingly arranged with the filter element.
[0009] Preferably, the guide is located below the filter, and the filter and the guide are located at opposite ends of the separation chamber.
[0010] The beneficial effects of this utility model are as follows: The ability to effectively extract sediment from the bottom of the borehole using air-lift reverse circulation can significantly improve the borehole cleaning efficiency, thereby ensuring the smooth progress of subsequent construction. It can also achieve effective separation of sediment and mud in the sediment-carrying fluid, and the separated clean mud can be reinjected into the borehole through the mud discharge pipe, greatly reducing the amount of mud discharged and the amount of fresh mud prepared, thus effectively realizing the reuse of resources. Attached Figure Description
[0011] Figure 1 The diagram shown is a structural schematic of an air-lift reverse circulation hole cleaning device for drilled and grouted piles with mud wall protection. Figure 2 The diagram shown is a schematic of the installation structure of the separation chamber; Figure 3 The diagram shows the installation structure of the slurry discharge pipe; Figure 4 The diagram shows the installation structure of the filter element; In the diagram: 1. Frame; 2. Air compressor; 3. Air pipe; 4. First conduit; 5. Second conduit; 6. Bolt; 7. Nut; 8. Anti-clogging slag suction component; 9. Slurry discharge pipe; 10. Separation chamber; 11. Filter component; 12. Sediment discharge pipe; 13. Guide component; 14. Slurry discharge pipe. Detailed Implementation
[0012] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.
[0013] Example 1 This utility model provides a mud-wall-protected bored pile air-lift reverse circulation hole cleaning device, such as... Figures 1 to 4 As shown, the system includes: a frame 1, an air compressor 2, an air pipe 3, and a hole cleaning assembly. The frame 1 supports the air-lift reverse circulation hole cleaning device for mud-walled bored piles. The air compressor 2 is mounted on the frame 1 and is equipped with a pressure regulating valve to precisely control the airflow pressure and flow rate. The air pipe 3 is connected to the air compressor 2. The hole cleaning assembly includes a first guide pipe 4, a second guide pipe 5, bolts 6, nuts 7, an anti-clogging slag suction component 8, and a slag discharge pipe 9. The first guide pipe 4 is connected to the frame 1, and the second guide pipe 5 is mounted on the first guide pipe 6. Pipe 4 and bolt 6 are inserted into the first conduit 4 and the second conduit 5. A silicone sealing gasket is provided at the connection between the first conduit 4 and the second conduit 5. Nut 7 is connected to bolt 6. An anti-clogging suction device 8 is provided in the second conduit 5. The anti-clogging suction device 8 can be an anti-clogging suction hood. Slurry discharge pipe 9 is connected to the first conduit 4. Air pipe 3 is located inside the first conduit 4. The center of air pipe 3 is on the same vertical line as the center of the first conduit 4. The second conduit 5 is located below the first conduit 4. The conduit 5 is correspondingly arranged with the first conduit 4, and also includes a slurry separation component. The slurry separation component includes a separation chamber 10, a filter element 11, a sediment discharge pipe 12, a guide element 13, and a mud discharge pipe 14. The separation chamber 10 is connected to the slurry discharge pipe 9, and the filter element 11 is disposed in the separation chamber 10. The filter element 11 can be a filter plate, and multiple filter holes are opened inside the filter element 11. The filter element 11 is kept in an inclined state (the height of the end near the slurry discharge pipe 9 is higher than the height of the end near the sediment discharge pipe 12). The sediment discharge pipe 12... Connected to the separation chamber 10, the guide 13 is set in the separation chamber 10. The guide 13 can be a guide plate. The guide plate is kept in an inclined state (the height of the end near the slurry discharge pipe 9 is lower than the height of the end near the sediment discharge pipe 12). The mud discharge pipe 14 is connected to the separation chamber 10. The filter element 11 is located below the slurry discharge pipe 9. The sediment discharge pipe 12 is set in correspondence with the filter element 11. The guide 13 is located below the filter element 11. The filter element 11 and the guide 13 are located at both ends of the separation chamber 10, respectively.
[0014] By combining the hole cleaning component with the slurry separation component, air lift reverse circulation can be used to effectively extract sediment from the bottom of the hole, which can significantly improve the hole cleaning efficiency and ensure the smooth progress of subsequent construction. It can also achieve effective separation of sediment and mud in the slurry-carrying fluid, and the separated clean mud is reinjected into the borehole through the mud discharge pipe 14, which greatly reduces the amount of mud discharged and the amount of fresh mud prepared, thereby effectively realizing the reuse of resources.
[0015] In use, first select an appropriate number of conduits as needed. In this example, the first conduit 4 and the second conduit 5 are used. Then, the first conduit 4 and the second conduit 5 are installed by using bolts 6 and nuts 7. Next, the second conduit 5 and the anti-clogging suction device 8 are inserted into the sediment area at the bottom of the borehole. Then, the air compressor 2 is started. The high-pressure airflow generated by the air compressor 2 is delivered to the inside of the second conduit 5 through the air pipe 3. The center of the air pipe 3 is on the same vertical line as the center of the conduit to ensure the uniformity of airflow injection. The high-pressure gas mixes with the mud inside the conduit, forming a low-density gas-liquid mixture, which creates a huge pressure difference between the inside and outside of the conduit. Under this air lift action, the mud at the bottom of the hole carrying sediment is sucked up. The slag-carrying fluid enters the anti-clogging suction device 8, and then flows sequentially through the second conduit 5 and the first conduit 4, finally exiting from the top slurry discharge pipe 9. It then enters the separation chamber 10, where the discharged mixed fluid first falls onto the inclined filter element 11, where larger particles of sediment are trapped and slide down along the inclined filter element 11, finally exiting through the sediment discharge pipe 12. At the same time, the mud separated from the filter holes of the filter element 11 falls onto the guide element 13 under gravity. The guide element 13 is also inclined, which can guide and collect the separated clean mud into the mud discharge pipe 14. Subsequently, the clean mud is reinjected into the borehole through the mud discharge pipe 14 to maintain the pressure balance in the borehole and realize the reuse of mud.
[0016] Specifically, an air compressor 2 is installed at the top of the frame 1, and an air pipe 3 is connected to the bottom of the air compressor 2. A first conduit 4 is fixedly connected to the bottom of the frame 1, and a second conduit 5 is installed at the bottom of the first conduit 4. Bolts 6 are inserted into both the first conduit 4 and the second conduit 5. A nut 7 is threaded to one end of the bolt 6, and the other end of the nut 7 is kept in contact with the outer surface of the first conduit 4. An anti-clogging slag suction component 8 is installed at the bottom of the second conduit 5. A slurry discharge pipe 9 is connected to the top of the first conduit 4, and a separation chamber 10 is fixedly connected to the outer surface of the slurry discharge pipe 9. A filter element 11 is installed inside the separation chamber 10. A sediment discharge pipe 12 is installed inside the separation chamber 10 at the end away from the slurry discharge pipe 9. A guide element 13 is installed inside the separation chamber 10 below the filter element 11. A mud discharge pipe 14 is installed inside the separation chamber 10 at the end closer to the slurry discharge pipe 9.
[0017] Working Principle: In actual use, the device first selects an appropriate number of conduits as needed. In this example, the first conduit 4 and the second conduit 5 are used. Then, the first conduit 4 and the second conduit 5 are installed using bolts 6 and nuts 7. Next, the second conduit 5 and the anti-clogging suction device 8 are inserted into the sediment area at the bottom of the borehole. Then, the air compressor 2 is started. The high-pressure airflow generated by the air compressor 2 is delivered to the inside of the second conduit 5 through the air pipe 3. The center of the air pipe 3 is on the same vertical line as the center of the conduit to ensure uniform airflow injection. The high-pressure gas mixes with the mud inside the conduit, forming a low-density gas-liquid mixture, resulting in a large pressure difference between the inside and outside of the conduit. Under this airlift action, the mud at the bottom of the borehole, carrying sediment, is sucked into the anti-clogging suction device 8. Subsequently, the sediment-carrying fluid flows sequentially through the second conduit 5 and the first conduit 4, and finally exits from the top slurry discharge pipe 9, then enters the separation chamber 10. The discharged mixed fluid first falls onto the inclined filter element 11, where larger particles of sediment are trapped and slide down along the inclined filter element 11, eventually being discharged through the sediment discharge pipe 12. Simultaneously, the mud separated from the filter holes of the filter element 11 falls onto the guide element 13 under gravity. The guide element 13 is also inclined, which guides and collects the separated clean mud into the mud discharge pipe 14. Subsequently, the clean mud is reinjected into the borehole through the mud discharge pipe 14, maintaining the pressure balance in the borehole and realizing the reuse of mud. It can effectively extract sediment from the bottom of the borehole using air lift reverse circulation, which can significantly improve the borehole cleaning efficiency, thereby ensuring the smooth progress of subsequent construction. It can also achieve effective separation of sediment and mud in the sediment-carrying fluid, and the separated clean mud is reinjected into the borehole through the mud discharge pipe 14, greatly reducing the amount of mud discharged and the amount of fresh mud prepared, thus effectively realizing the reuse of resources.
[0018] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.
Claims
1. A mud-wall-protected bored pile air-lift reverse circulation hole cleaning device, characterized in that, include: Frame (1) is used to support the air-lift reverse circulation hole cleaning device for mud-wall drilling and grouting piles; An air compressor (2) is installed on the frame (1); Air pipe (3) is connected to the air compressor (2); The hole cleaning assembly includes a first guide tube (4), a second guide tube (5), a bolt (6), a nut (7), an anti-clogging slag suction component (8), and a slurry discharge pipe (9). The first guide tube (4) is connected to the frame (1), the second guide tube (5) is disposed on the first guide tube (4), the bolt (6) is inserted into the first guide tube (4), the bolt (6) is inserted into the second guide tube (5), the nut (7) is connected to the bolt (6), the anti-clogging slag suction component (8) is disposed on the second guide tube (5), and the slurry discharge pipe (9) is connected to the first guide tube (4).
2. The air-lift reverse circulation hole cleaning device for drilled and grouted piles with mud wall protection according to claim 1, characterized in that: It also includes a slurry separation component, which includes a separation chamber (10), a filter element (11), a sediment discharge pipe (12), a guide element (13), and a mud discharge pipe (14). The separation chamber (10) is connected to the slurry discharge pipe (9), the filter element (11) is disposed in the separation chamber (10), the sediment discharge pipe (12) is connected to the separation chamber (10), the guide element (13) is disposed in the separation chamber (10), and the mud discharge pipe (14) is connected to the separation chamber (10).
3. The air-lift reverse circulation hole cleaning device for drilled and grouted piles with mud wall protection according to claim 1, characterized in that: The trachea (3) is located inside the first conduit (4), and the center of the trachea (3) and the center of the first conduit (4) are on the same vertical line.
4. The air-lift reverse circulation hole cleaning device for drilled and grouted piles with mud wall protection according to claim 1, characterized in that: The second conduit (5) is located below the first conduit (4), and the second conduit (5) is configured corresponding to the first conduit (4).
5. The air-lift reverse circulation hole cleaning device for drilled and grouted piles with mud wall protection according to claim 2, characterized in that: The filter element (11) is located below the slurry discharge pipe (9), and the sediment discharge pipe (12) is correspondingly arranged with the filter element (11).
6. The air-lift reverse circulation hole cleaning device for drilled and grouted piles with mud wall protection according to claim 2, characterized in that: The guide (13) is located below the filter (11), and the filter (11) and the guide (13) are located at both ends of the separation chamber (10).