Micro-hole perfusion pile hole cleaning tool
Patent Information
- Application Number
- CN202522444812.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-18
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-11-18
AI Technical Summary
[0002]在微型孔灌注桩施工过程中，不可避免的会有泥沙或者其他杂物进入打设的孔内，为了保证施工的顺利，必须要将孔内的杂物清出，而且在灌注桩中填充止水材料前，需要清理桩孔内砂层至设计标高，如果清理后没有达到设计标高，可能会导致漏水现象，从而导致基础工程延期，目前常用的灌注桩清孔方法有人工清孔和气路排沙式清孔，人工清孔方式，通过手工一点一点将锁扣内的砂子和水清理出来，工作效率低，清孔效果不理想；气路排沙式清孔是在出沙管上连接进气管并伸入至桩孔中，进气管与空压机连接向桩孔中泵送高压空气，使沙泥沿出沙管排出，这种方式效率高，清孔效果也更好，缺点是：
本实用新型的微型孔灌注桩清孔工装，清孔时将进气管上端与空压机的气管连接，将主管插入至桩孔中，启动空压机使高压空气沿进气管泵送至桩孔内，桩孔内的泥沙随高压空气的泵入而沿主管向上运动，并从排沙管中排出，实现清孔，进气管固定在主管内，不占用主管外的空间，适用于微型孔灌注桩的清孔作业，进气管的上端从主管中伸出与空压机的气管连接，不会进入至桩孔中，避免排沙对进气管与空压机气管连接处的影响，保证空气泵送的可靠性，主管上端盖有帽盖，盖帽将主管上端封闭，使泥沙只能从排沙管排出，在清孔作业一段时间后打开帽盖，用疏通工具从主管上端伸入对主管进行疏通，以防止主管下端被泥沙堵塞，保证排沙的顺畅性，即提高清孔作业的效率，又降低清孔作业的劳动强度。
Smart Images
Figure CN224884720U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a tooling for cleaning micro-hole cast-in-place piles. Background Technology
[0002] During the construction of micro-hole cast-in-place piles, it is inevitable that mud, sand, or other debris will enter the drilled hole. To ensure smooth construction, it is necessary to remove the debris from the hole. Furthermore, before filling the pile with water-stopping material, the sand layer inside the pile hole needs to be cleaned to the design elevation. If the design elevation is not reached after cleaning, leakage may occur, leading to delays in the foundation project. Currently, commonly used methods for cleaning cast-in-place pile holes include manual cleaning and pneumatic sand removal. Manual cleaning involves manually removing sand and water bit by bit from the interlocking hole, which is inefficient and yields unsatisfactory results. Pneumatic sand removal involves connecting an air inlet pipe to the sand outlet pipe and extending it into the pile hole. The air inlet pipe is connected to an air compressor, which pumps high-pressure air into the pile hole, causing the sand and mud to be discharged along the sand outlet pipe. This method is efficient and yields better results. However, its disadvantages are: 1. In order to ensure that the connection between the air pressure outlet pipe and the air inlet pipe is close to the lower end of the outlet pipe, the connection between the outlet pipe and the air inlet pipe in the pile hole during the sand discharge process is prone to loosening, which will cause the air pressure to drop and affect the sand discharge effect.
[0003] 2. For micro-hole grouting columns, the inner diameter of the pile hole is small, requiring the use of a smaller diameter sand discharge pipe to allow the sand discharge pipe and air inlet pipe to enter the pile hole together. This will affect the sand discharge efficiency, increase the risk of the sand discharge pipe being blocked, and increase the labor intensity of the hole cleaning operation. Utility Model Content
[0004] The micro-hole cast-in-place pile cleaning tool provided by this utility model has an air inlet pipe fixed inside the main pipe. It is suitable for cleaning operations of micro-hole cast-in-place piles, ensuring the reliability of air pumping, preventing the lower end of the main pipe from being blocked by mud and sand, and ensuring smooth sand discharge. This improves the efficiency of the cleaning operation and reduces the labor intensity of the cleaning operation.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A tooling for cleaning micro-hole cast-in-place piles includes a main pipe that can extend into the pile hole and an air inlet pipe that introduces high-pressure gas into the pile hole. The air inlet pipe is fixed inside the main pipe and its upper end extends out of the main pipe. The upper end of the main pipe is covered with a cap. An inclined sand discharge pipe is connected to the main pipe and the sand discharge pipe is close to the upper end of the main pipe.
[0006] Preferably, the intake pipe is positioned against the inner wall of the main pipe and is located on the side opposite to the sand discharge pipe. The inner diameter of the main pipe is at least four times the inner diameter of the intake pipe, the inner diameter of the sand discharge pipe is equal to the inner diameter of the main pipe, and the length of the main pipe is 1500~2000mm.
[0007] Preferably, the lower end of the air intake pipe is located inside the main pipe, and the distance between the lower end of the main pipe and the main pipe is 100±5mm. The upper end of the air intake pipe is close to the upper end of the main pipe and bends outward and extends 150~200mm out of the main pipe.
[0008] Preferably, the upper end of the air intake pipe has an external thread that connects with the air pipe of the air compressor, and is equipped with a manual valve for controlling the opening and closing of the air intake pipe.
[0009] Preferably, the cap is hinged to the upper end of the main pipe, and a pin is installed on the cap. The pin is inserted into the main pipe to position the cap on the main pipe.
[0010] The beneficial effects of this utility model are: This utility model discloses a tooling for cleaning micro-hole cast-in-place piles. During cleaning, the upper end of the air inlet pipe is connected to the air pipe of an air compressor. The main pipe is inserted into the pile hole, and the air compressor is started to pump high-pressure air into the pile hole along the air inlet pipe. The mud and sand in the pile hole move upwards along the main pipe with the pumped-in high-pressure air and are discharged through the sand discharge pipe, thus achieving hole cleaning. The air inlet pipe is fixed inside the main pipe and does not occupy space outside the main pipe. It is suitable for cleaning operations of micro-hole cast-in-place piles. The upper end of the air inlet pipe extends from the main pipe and connects with the air compressor's air supply. The pipe connection prevents sand from entering the pile hole, avoiding the impact of sand discharge on the connection between the air intake pipe and the air compressor pipe, thus ensuring the reliability of air pumping. The upper end of the main pipe is covered with a cap, which seals the upper end of the main pipe, allowing sand to be discharged only from the sand discharge pipe. After a period of hole cleaning operation, the cap is opened, and a dredging tool is inserted from the upper end of the main pipe to dredge it, preventing the lower end of the main pipe from being blocked by sand and ensuring smooth sand discharge. This improves the efficiency of hole cleaning operation and reduces the labor intensity of hole cleaning operation. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the hole cleaning tool for micro-hole cast-in-place piles in a specific implementation method.
[0012] Figure 2 This is a magnified view of the upper part of the main pipe.
[0013] Figure 3 This is a partially enlarged schematic diagram of the upper part of the intake pipe.
[0014] Figure 4 A schematic diagram of a tool for cleaning micro-hole cast-in-place piles extending into the pile hole. Detailed Implementation
[0015] The following is combined with Figures 1-4 The embodiments of this utility model will be described in detail below.
[0016] A tooling for cleaning micro-hole cast-in-place piles includes a main pipe 1 that can extend into the pile hole 100 and an air inlet pipe 2 that introduces high-pressure gas into the pile hole 100. The air inlet pipe 2 is fixed inside the main pipe 1 and its upper end extends out of the main pipe 1. The upper end of the main pipe 1 is covered with a cap 3. A sand discharge pipe 4 is inclinedly connected to the main pipe 1 and is close to the upper end of the main pipe 1.
[0017] The aforementioned micro-hole cast-in-place pile cleaning fixture connects the upper end of the air inlet pipe 2 to the air pipe of an air compressor during cleaning. The main pipe 1 is inserted into the pile hole 100. The air compressor is started, pumping high-pressure air along the air inlet pipe 2 into the pile hole 100. The mud and sand inside the pile hole 100 move upwards along the main pipe 1 with the pumped-in high-pressure air and are discharged through the sand discharge pipe 4, thus cleaning the hole. The air inlet pipe 2 is fixed inside the main pipe 1 and does not occupy space outside the main pipe 1. It is suitable for cleaning micro-hole cast-in-place piles. The upper end of the air inlet pipe 2 extends from the main pipe 1. The air pipe connected to the air compressor will not enter the pile hole, avoiding the impact of sand discharge on the connection between the air intake pipe and the air compressor pipe, thus ensuring the reliability of air pumping. The upper end of the main pipe 1 is covered with a cap 3, which seals the upper end of the main pipe 1, so that the mud and sand can only be discharged from the sand discharge pipe. After the hole cleaning operation has been going on for a period of time, the cap 3 is opened, and a dredging tool is inserted from the upper end of the main pipe 1 to dredge the main pipe 1, so as to prevent the lower end of the main pipe from being blocked by mud and sand, ensuring the smoothness of sand discharge, which improves the efficiency of hole cleaning operation and reduces the labor intensity of hole cleaning operation.
[0018] The air intake pipe 2 is positioned against the inner wall of the main pipe 1 and is located on the side opposite to the sand discharge pipe 4. The inner diameter of the main pipe 1 is at least four times the inner diameter of the air intake pipe 2. The inner diameter of the sand discharge pipe 4 is equal to the inner diameter of the main pipe 1. The length of the main pipe 1 is 1500~2000 mm. The outer diameter of the main pipe 1 should be slightly smaller than the inner diameter of the pile hole 100 so that the main pipe 1 can be smoothly inserted into the pile hole 100. The inner diameter of the air inlet pipe 2 is small, so it does not occupy too much internal space of the main pipe 1 and can reduce the pressure loss of the high-pressure gas pumped by the air compressor in the air inlet pipe 2, ensuring that the gas pumped out in the air inlet pipe 2 can effectively blow out the mud and sand. When the hole cleaning operation begins, the lower half of the main pipe 1 should be inserted into the pile hole 100. As the hole cleaning operation progresses, the insertion depth of the main pipe 1 will gradually increase. Therefore, the length of the main pipe 1 is designed to be 1500~2000 mm to ensure that the upper ends of the sand discharge pipe 4 and the air inlet pipe 2 are always above the pile hole 100 during the hole cleaning operation. As can be seen from the attached figure, the sand discharge pipe 4 is located on the right side of the main pipe 1, and the air inlet pipe 2 is located on the left side of the main pipe 1. The two are set opposite each other, with the left side for air intake and the right side for sand discharge without interference.
[0019] The lower end of the air inlet pipe 2 is located inside the main pipe 1, and the distance between them is 100±5mm. The upper end of the air inlet pipe 1 is close to the upper end of the main pipe 1 and bends outward, extending 150~200mm beyond the main pipe. The fact that the lower end of the air inlet pipe 2 does not extend beyond the main pipe 1 and is 100±5mm away from it reduces the contact between the air inlet pipe 2 and the mud and sand, lowers the probability of the air inlet pipe 2 being blocked by mud and sand, improves the reliability of the hole cleaning operation, and avoids affecting the sand blowing effect due to the lower end of the air inlet pipe 2 being too far from the mud and sand. The upper end of the air inlet pipe 1 is close to the upper end of the main pipe 1 and bends outward, extending 150~200mm beyond the main pipe, which facilitates the connection of the upper end of the air inlet pipe 1 with the air pipe of the air compressor.
[0020] The upper end of the air intake pipe 2 has an external thread 21 that connects with the air pipe of the air compressor, and is equipped with a manual valve 21 for controlling the opening and closing of the air intake pipe 2. The external thread 21 allows the air pipe of the air compressor to be reliably and quickly connected to the air intake pipe 2, and the manual valve 21 facilitates the control of the opening and closing of the air intake pipe 2, improving the operational standardization of the hole cleaning operation and reducing labor intensity.
[0021] The cap 3 is hinged to the upper end of the main pipe 1, and a pin 5 is installed on the cap 3. The pin 5 is inserted into the main pipe 1 to position the cap 3 on the main pipe 1. When the pin 5 is inserted into the main pipe 1, the cap 3 cannot be opened, and the cap 3 seals the upper end of the main pipe 1. The mud and sand can only be discharged from the sand discharge pipe 4. When the pin 5 is pulled out of the main pipe 1, the cap 3 can be opened, and a dredging tool can be inserted into the main pipe 1 from the top to dredge the main pipe 1. This prevents the main pipe 1 from being blocked by mud and sand during the hole cleaning operation, ensures the smooth flow of the main pipe 1, improves the hole cleaning efficiency, and reduces the labor intensity of the hole cleaning operation.
[0022] The technical solutions of the embodiments of this utility model have been fully described above with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
Claims
1. A tooling for cleaning micro-hole cast-in-place piles, comprising a main pipe that can extend into the pile hole and an air inlet pipe for introducing high-pressure gas into the pile hole, characterized in that: The air intake pipe is fixed inside the main pipe, and its upper end extends out of the main pipe. The upper end of the main pipe is covered with a cap, and the main pipe is connected to an inclined sand discharge pipe, which is close to the upper end of the main pipe.
2. The tooling for cleaning micro-hole cast-in-place piles according to claim 1, characterized in that: The air intake pipe is positioned against the inner wall of the main pipe and is located on the side opposite to the sand discharge pipe. The inner diameter of the main pipe is at least four times the inner diameter of the air intake pipe, the inner diameter of the sand discharge pipe is equal to the inner diameter of the main pipe, and the length of the main pipe is 1500~2000 mm.
3. The tooling for cleaning micro-hole cast-in-place piles according to claim 2, characterized in that: The lower end of the air intake pipe is located inside the main pipe, and the distance between the lower end of the main pipe and the main pipe is 100±5mm. The upper end of the air intake pipe is close to the upper end of the main pipe and bends outward and extends 150~200mm out of the main pipe.
4. The tooling for cleaning micro-hole cast-in-place piles according to claim 3, characterized in that: The upper end of the intake pipe has an external thread that connects with the air pipe of the air compressor, and is equipped with a manual valve to control the opening and closing of the intake pipe.
5. The tooling for cleaning micro-hole cast-in-place piles according to claim 1, characterized in that: The cap is hinged to the upper end of the main pipe, and a pin is installed on the cap. The pin is inserted into the main pipe to position the cap on the main pipe.