High-pressure jet grouting pile for foundation pit water stopping

Abstract

The utility model provides a high-pressure jet grouting pile for foundation pit water stopping, and relates to the technical field of jet grouting water stopping pile construction. The high-pressure jet grouting pile for foundation pit water stopping comprises a ground, and a guide hole is formed in the outer surface of the ground. According to the high-pressure jet grouting pile for foundation pit water stopping, through cooperation of a guide hole, a clamping block, a telescopic rod and a spring, a sleeve is inserted into the guide hole, two clamping plates are manually close to each other, a drill rod is placed on the inner wall of the sleeve, the clamping block is loosened, the clamping block makes contact with the inner wall of the sleeve, the drill rod is moved downwards, and the clamping block moves downwards in a sliding mode on the inner wall of the sleeve; the clamping block is located on the bottom face of the sleeve and can drive the sleeve to move, the sleeve rod moves upwards along with upward movement of the drill rod, the sleeve rod is taken out of the guide hole by the drill rod, and the problems that after hole guide is conducted in existing construction, soil is loosened, soil on the side wall of the guide hole falls easily, the guide hole is blocked, and therefore the drill rod and a sprayer make contact with the soil in the falling process, and construction efficiency is improved are solved. And a drill rod is difficult to descend to a set position.

Description

Technical Field

[0001] This utility model relates to a high-pressure jet grouting pile, specifically a high-pressure jet grouting pile for foundation pit water stopping, belonging to the technical field of jet grouting water stopping pile construction. Background Technology

[0002] High-pressure jet grouting piles use high-pressure rotating nozzles to inject cement grout into the soil layer and mix it with the soil to form a continuous, overlapping cement-reinforced body. Construction requires less land, has less vibration and lower noise, but it is prone to environmental pollution and has a higher cost. It is not suitable for special soil types where the injected grout cannot solidify. In recent years, high-pressure jet grouting piles have been increasingly widely used in foundation reinforcement treatment, deep foundation pit water-stop curtain and other projects. When using high-pressure jet grouting piles, it is necessary to pre-drill holes at the water-stopping location, and then insert the drill rod and nozzle into the ground through the pre-drill holes.

[0003] However, in existing construction methods, after the pilot hole is drilled, the soil becomes loose, which can easily cause soil to fall off the sidewalls of the pilot hole and block it. This causes the drill rod and nozzle to come into contact with the soil when they fall, resulting in nozzle blockage and difficulty in lowering the drill rod to the designated position. To address these issues, we provide a high-pressure jet grouting pile for foundation pit water sealing. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a high-pressure jet grouting pile for foundation pit water sealing, with the specific technical solution as follows:

[0005] A high-pressure jet grouting pile for foundation pit water sealing includes a ground surface, an inlet hole on the outer surface of the ground surface, a sleeve slidably connected to the inner wall of the inlet hole, a drill rod inside the sleeve, a through hole inside the drill rod, a nozzle connected to the bottom surface of the drill rod, and a locking block outside the drill rod, the outer surface of the locking block being slidably connected to the inner wall of the sleeve.

[0006] Preferably, the outer surface of the drill rod is connected to a threaded sleeve, and the inner thread of the threaded sleeve is connected to a threaded cylinder.

[0007] Preferably, a telescopic rod is connected to the outer surface of the threaded cylinder, one end of the telescopic rod is connected to the outer surface of the locking block, a spring is sleeved on the outside of the telescopic rod, one end of the spring is connected to the outer surface of the threaded cylinder, and the other end of the spring is connected to the outer surface of the locking block.

[0008] Preferably, a wear-resistant rod is connected to the outer surface of the card block, and the outer surface of the wear-resistant rod is in contact with the bottom surface of the sleeve.

[0009] Preferably, the bottom surface of the drill rod is connected to a threaded tube, and the inner wall of the threaded tube is threaded with a screw rod, one end of which is fixedly connected to the outer surface of the nozzle.

[0010] Preferably, a circular plate is connected to the outer surface of the sleeve, and the bottom surface of the circular plate is slidably connected to the upper surface of the ground.

[0011] Preferably, there are two locking blocks, symmetrically distributed at the bottom end of the drill rod.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This high-pressure jet grouting pile for foundation pit water sealing utilizes the cooperation between the pilot hole, casing, drill rod, clamping block, telescopic rod, and spring. When using this device, after the pilot hole is opened in the soil, the casing is inserted into the pilot hole to prevent soil from falling off the inner wall of the pilot hole. The two clamping plates are manually brought close together, and the drill rod is placed on the inner wall of the casing. The clamping block is released, and it contacts the inner wall of the casing. The drill rod is then moved downwards, and the clamping block slides downwards along the inner wall of the casing. When the drill rod reaches the set position, the clamping block will be located at the bottom of the casing, allowing the casing to move. As the drill rod moves upwards, the casing also moves upwards, and the drill rod is carried out of the pilot hole. This solves the problem in existing construction where, after the pilot hole is opened, the soil loosens, causing soil to fall off the side wall of the pilot hole and block it. This results in the drill rod and nozzle coming into contact with the soil during descent, causing nozzle blockage and making it difficult for the drill rod to reach the set position.

[0014] 2. The high-pressure jet grouting pile for pit water sealing utilizes the cooperation between the drill rod, threaded sleeve, threaded cylinder, telescopic rod, clamping block, and spring. When using this device, if a casing is required, the threaded cylinder is rotated and screwed into the outer surface of the threaded sleeve. The telescopic rod, spring, and clamping block can then be installed on the outer surface of the drill rod. When the casing is not needed, the telescopic rod, spring, and clamping block can be disassembled, achieving the purpose of easy installation and disassembly, and meeting diverse needs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial exploded view of the structure of this utility model;

[0017] Figure 3 This is a partial structural schematic diagram of the present invention;

[0018] Figure 4 An exploded view showing the positional relationship between the threaded pipe and the screw of this utility model;

[0019] Figure 5 For the present utility model Figure 3 Enlarged view of the structure of section A in the middle.

[0020] Attached diagram descriptions: 1. Ground; 2. Pilot hole; 3. Sleeve; 4. Drill rod; 5. Through hole; 6. Nozzle; 7. Clamping block; 8. Threaded sleeve; 9. Threaded cylinder; 10. Telescopic rod; 11. Spring; 12. Wear-resistant rod; 13. Threaded pipe; 14. Screw; 15. Circular plate. Detailed Implementation

[0021] The present invention will now be further described with reference to the accompanying drawings.

[0022] Please see Figure 1-5 As shown, a high-pressure jet grouting pile for foundation pit water sealing includes a ground surface 1. A pilot hole 2 is opened on the outer surface of the ground surface 1. When opening the pilot hole 2, a drilling rig is used to open the pilot hole 2. The drill bit is aligned with the center of the hole position, and the drilling rig is rotated and drilled by a power mechanism. A sleeve 3 is slidably connected to the inner wall of the pilot hole 2.

[0023] A circular plate 15 is connected to the outer surface of the sleeve 3. The bottom surface of the circular plate 15 is slidably connected to the upper surface of the ground 1. The circular plate 15 is located at one end of the sleeve 3 to prevent the sleeve 3 from being completely inside the pilot hole 2 and difficult to remove. When lowering the sleeve 3, the sleeve 3 is lowered manually and the sleeve 3 is pressed tightly against the inner wall of the pilot hole 2. The sleeve 3 is made of PVC sleeve 3, the main component of which is polyvinyl chloride. Other components are added to enhance its heat resistance, toughness and ductility.

[0024] The casing 3 is equipped with a drill rod 4, which is lowered by a jet grouting drill. A jet grouting drill is a mechanical device that can drill and inject grout in underground rock and soil environments. It has two functions: rotary drilling and mud injection. It can be used for soil drilling and for injecting grouting materials in the construction of structures. The outer surface of the drill rod 4 is connected to a threaded sleeve 8, and the threaded sleeve 8 is connected to a threaded cylinder 9. Both the threaded sleeve 8 and the threaded cylinder 9 are made of stainless steel and will not rust even after long-term contact with water.

[0025] The drill rod 4 has a through hole 5 inside, through which mortar is transported. One end of the drill rod 4 is connected to the mortar equipment, which is equipped with a high-pressure pump. The high-pressure pump is one of the important devices for generating high-pressure liquid. The concrete is delivered to the nozzle by driving the high-pressure pump.

[0026] The bottom surface of the drill rod 4 is connected to the nozzle 6, and the bottom surface of the drill rod 4 is connected to the threaded tube 13. The inner wall of the threaded tube 13 is threaded with a screw 14. One end of the screw 14 is fixedly connected to the outer surface of the nozzle 6. The nozzle 6 can be installed by rotating and screwing the screw 14 into the inside of the threaded tube 13, which also facilitates the replacement of the nozzle 6.

[0027] Two locking blocks 7 are symmetrically distributed at the bottom of the drill pipe 4. The locking blocks 7 are arc-shaped to reduce the contact area with the inner wall of the casing 3, thus reducing friction. A telescopic rod 10 is connected to the outer surface of the threaded cylinder 9. One end of the telescopic rod 10 is connected to the outer surface of the locking blocks 7. A spring 11 is sleeved on the outside of the telescopic rod 10. One end of the spring 11 is connected to the outer surface of the threaded cylinder 9, and the other end is connected to the outer surface of the locking blocks 7. When the two locking blocks 7 are manually brought closer together, the spring 11... The telescopic rod 10 shortens as the drill rod 4 is placed on the inner wall of the casing 3. The locking block 7 is released, and the locking block 7 contacts the inner wall of the casing 3. The telescopic rod 10 extends, and the spring 11 extends, causing the locking block 7 to press against the inner wall of the casing 3, thus moving the drill rod 4 downward. The locking block 7 slides downward against the inner wall of the casing 3. When the drill rod 4 moves to the set position, the locking block 7 will be located on the bottom surface of the casing 3. At this time, the spring 11 returns to its original position and extends, and the telescopic rod 10 extends. The telescopic rod 10 can only shorten under the pressure of external force.

[0028] The outer surface of the clamping block 7 is connected to a wear-resistant rod 12. The outer surface of the wear-resistant rod 12 is in contact with the bottom surface of the casing 3. When the drill rod 4 is rotated by the rotary jet drilling machine, the wear-resistant rod 12 will contact the bottom surface of the casing 3. The wear-resistant rod 12 can prevent the clamping block 7 from rubbing against the casing 3 and causing wear. The outer surface of the clamping block 7 is slidably connected to the inner wall of the casing 3.

[0029] The telescopic rod 10 in this application is a common electrical device in the prior art. This application will not elaborate on its model or internal structure. It can also be replaced by other power sources.

[0030] In use, this invention works as follows: First, a pilot hole 2 is made at the location where water needs to be stopped. Then, the sleeve 3 is inserted into the pilot hole 2 to prevent soil from falling off the inner wall of the pilot hole 2. The two locking blocks 7 are manually brought closer together, causing the spring 11 to retract and the telescopic rod 10 to shorten. The drill rod 4 is placed on the inner wall of the sleeve 3. The locking blocks 7 are released, and they contact the inner wall of the sleeve 3. The telescopic rod 10 and the spring 11 extend, causing the locking blocks 7 to press against the inner wall of the sleeve 3, thus moving the drill rod 4 downward. The locking blocks 7 slide downward against the inner wall of the sleeve 3. When the drill rod 4 reaches the set position, the locking blocks... Block 7 will be located on the bottom surface of sleeve 3. At this time, spring 11 will return to its original position and extend, telescopic rod 10 will extend, drill rod 4 will be moved upward and grouting will be performed. Drill rod 4 moves upward, driving block 7 to move upward. Block 7 drives sleeve 3 to move upward, so that the position of drill rod 4 and sleeve 3 are consistent. When drill rod 4 slides out of pilot hole 2, sleeve 3 will also slide out of pilot hole 2. When sleeve 3 is no longer needed, threaded cylinder 9 can be rotated and unscrewed from the outer surface of threaded sleeve 8, so that telescopic rod 10, spring 11 and block 7 can be disassembled, so as to facilitate installation and disassembly and meet diverse needs.

[0031] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.

Claims

1. A high-pressure jet grouting pile for foundation pit water stop, comprising a ground (1), characterized in that: The outer surface of the ground (1) is provided with a lead hole (2), the inner wall of the lead hole (2) is slidably connected with a sleeve (3), the inside of the sleeve (3) is provided with a drill rod (4), the inside of the drill rod (4) is provided with a through hole (5), the bottom surface of the drill rod (4) is communicated with a spray head (6), the outside of the drill rod (4) is provided with a clamping block (7), and the outer surface of the clamping block (7) is slidably connected with the inner wall of the sleeve (3).

2. The high-pressure jet grouting pile for foundation pit water stop according to claim 1, characterized in that: The outer surface of the drill rod (4) is connected with a threaded sleeve (8), and the inside of the threaded sleeve (8) is threadedly connected with a threaded cylinder (9).

3. The high-pressure jet grouting pile for foundation pit water stop according to claim 2, characterized in that: The outer surface of the threaded cylinder (9) is connected with a telescopic rod (10), one end of the telescopic rod (10) is connected with the outer surface of the clamping block (7), the outside of the telescopic rod (10) is sleeved with a spring (11), one end of the spring (11) is connected with the outer surface of the threaded cylinder (9), and the other end of the spring (11) is connected with the outer surface of the clamping block (7).

4. The high-pressure jet grouting pile for foundation pit water stop according to claim 1, characterized in that: The outer surface of the clamping block (7) is connected with a wear-resistant rod (12), and the outer surface of the wear-resistant rod (12) is in contact with the bottom surface of the sleeve (3).

5. The high-pressure jet grouting pile for foundation pit water stop according to claim 1, characterized in that: The bottom surface of the drill rod (4) is connected with a threaded pipe (13), the inner wall of the threaded pipe (13) is threadedly connected with a screw rod (14), and one end of the screw rod (14) is fixedly communicated with the outer surface of the spray head (6).

6. The high-pressure jet grouting pile for foundation pit water stop according to claim 1, characterized in that: The outer surface of the sleeve (3) is connected with a circular plate (15), and the bottom surface of the circular plate (15) is slidably connected with the upper surface of the ground (1).

7. The high-pressure jet grouting pile for foundation pit water stop according to claim 1, characterized in that: The clamping block (7) is shared by two, and is symmetrically distributed at the bottom end of the drill rod (4).

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